JP2009283319A - Arrangement structure of coolant flow control valve in fuel cell system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suitably absorb vibration given a motor fitted at a coolant flow control valve. <P>SOLUTION: The coolant flow control valve 24 fitted through a mounting member 80 to an air compressor 30 for supplying air to a fuel cell stack for controlling a circulation volume of a coolant, and rubber-made piping tubes 84a, 84b connected, respectively, to an inlet port 40a through which the coolant is guided into the coolant flow control valve 24 and an outlet port 40b through which the coolant is guided out. A vibration-alleviating direction of the mounting member 80, a motor shaft direction of a valve-driving part suitable for the coolant flow control valve 24, and a bending direction of the piping tubes 84a, 84b as seen from the coolant flow control valve 24 are all set in the same direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an arrangement structure of a refrigerant flow rate control valve for controlling a flow rate of a refrigerant for cooling a fuel cell in a fuel cell system.

  Conventionally, a fuel cell constructed by stacking a plurality of fuel cells each sandwiching a solid polymer electrolyte membrane between an anode and a cathode and sandwiched by a separator has been developed, and this fuel cell is mounted on an automobile. And used as a power source battery for the automobile.

  In this type of fuel cell, for example, hydrogen gas (fuel gas) is supplied to the anode and air (oxidant gas) is supplied to the cathode, so that the hydrogen gas is ionized and flows inside the solid polymer electrolyte membrane. It moves so that electric energy can be obtained outside the fuel cell. In this case, for example, a refrigerant system is configured including a radiator, a refrigerant pump, a motor for driving the refrigerant pump, and the like, and the fuel cell is cooled by circulating the refrigerant along the refrigerant system.

With regard to this type of refrigerant system, for example, Patent Document 1 discloses that when the fuel cell operates at a predetermined output, the power generation efficiency of the fuel cell can be improved by intermittently stopping the refrigerant pump. The technical idea is disclosed.
JP 2005-518077 gazette

  By the way, in order to reduce the size and cost of the fuel cell system, the air compressor that supplies air to the fuel cell and the refrigerant pump that circulates the refrigerant can be driven by a single drive motor. Proposed.

  In this case, the refrigerant pump is provided so as to be driven simultaneously with the air compressor. For example, the refrigerant pump is driven together with the air compressor even when the refrigerant does not need to be circulated as in the low temperature startup. In some cases, a refrigerant flow rate control valve that restricts the flow rate of the refrigerant when the fuel cell system is started at a low temperature may be provided.

  The refrigerant flow control valve includes, for example, a valve body that is a so-called butterfly valve that opens and closes a pipe passage through which the refrigerant flows, a DC motor that rotationally drives the valve body between a fully closed state and a fully open state, It is comprised by the transmission mechanism etc. which transmit the rotational motion of DC motor to the said valve body.

  However, the motor shaft (motor shaft) of the DC motor disposed in the refrigerant flow control valve has some backlash along the motor shaft direction (motor shaft direction), and the motor shaft direction with respect to the DC motor. When strong vibration is applied, there is a concern that the brush and the motor coil constituting the DC motor may be damaged.

  Further, if a buffer mechanism for buffering vibration in the motor axial direction is provided inside the DC motor, there is a problem that the refrigerant flow rate control valve is increased in size and the number of parts is increased and the cost is increased.

  Further, since the refrigerant flow control valve hardly operates during normal operation of the fuel cell system, it always contacts the motor shaft of the DC motor and the bearing that rotatably supports the motor shaft at the same location. Is held in the state. In the case where the contact is maintained at the same part, for example, when vibration is applied from the body of a fuel cell vehicle or an air compressor to which the refrigerant flow rate control valve is attached, the contact part of the motor shaft and the bearing In some cases, a large load is applied locally, and damage to the DC motor may be greater than when a load is applied while the DC motor is operating.

  The present invention has been made in view of the above points, and can suitably buffer vibration applied to a motor provided in a refrigerant flow control valve without increasing the size of the fuel cell system. It is an object of the present invention to provide a refrigerant flow control valve arrangement structure in a fuel cell system.

In order to achieve the above object, the present invention provides a fuel cell that generates electricity by an electrochemical reaction between a fuel gas and an oxidant gas, an air compressor that supplies air to the fuel cell as the oxidant gas, and a refrigerant passage. A refrigerant pump that circulates the refrigerant along, a refrigerant flow rate control valve that has a motor and controls the flow rate of the refrigerant that cools the fuel cell, an inlet port into which the refrigerant is introduced to the refrigerant flow rate control valve, and An arrangement structure of the refrigerant flow rate control valve in a fuel cell system including piping tubes respectively connected to outlet ports from which the refrigerant is derived,
A pump unit in which the refrigerant flow rate control valve and the air compressor, or between the refrigerant flow rate control valve and the refrigerant pump, or a unit in which the air compressor and the refrigerant pump are unitized, and the refrigerant flow rate. One of the vibration reducing direction of the vibration isolating elastic body provided between the control valve, the motor shaft direction of the motor, and the piping tube connected to the inlet port or the outlet port is formed of a rubber material. The bending direction of the one piping tube viewed from the refrigerant flow control valve is set in the same direction.

  According to the present invention, the motor axial direction of the motor provided in the refrigerant flow control valve, the vibration absorption direction of the elastic body for vibration isolation, and the bending direction of the rubber piping tube connected to the refrigerant flow control valve are determined. By setting each in the same direction, it is possible to preferably alleviate the vibration applied to the motor shaft of the motor provided in the refrigerant flow rate control valve, and to avoid damage to the motor.

  As a result, according to the present invention, for example, relatively large vibrations generated in an air compressor, or in the piping tube due to the synergistic action of the vibration absorbing action by the vibration isolating elastic body and the vibration absorbing action by the rubber pipe tube. Various vibrations such as vibrations generated by the refrigerant flowing through the refrigerant are suitably absorbed (buffered), and vibration toughness with respect to the refrigerant flow control valve can be improved. The vibration-proof elastic body is a pump unit in which the refrigerant flow control valve and the air compressor, the refrigerant flow control valve and the refrigerant pump, or the air compressor and the refrigerant pump are integrated into a unit. And the refrigerant flow rate control valve.

  In the present invention, the air compressor, the refrigerant pump, or the two or more disk-shaped mount members that support the pump unit in which the air compressor and the refrigerant pump are integrated into a unit are provided in the radial direction. When arranged in parallel, the pump unit in which the air compressor, the refrigerant pump, or the air compressor and the refrigerant pump are unitized in a unit perpendicular to the radial direction of the mount member is swung. The small direction and the motor shaft direction of the motor are respectively set in the same direction.

  According to the present invention, by arranging the refrigerant flow control valve so that the motor axial direction of the motor provided in the refrigerant flow control valve coincides with, for example, the direction in which the air compressor swings less, Vibration applied to the motor can be suppressed. Note that the motor shaft direction of the motor provided in the refrigerant flow control valve, and the direction in which the swing of the refrigerant pump substituting for the air compressor or the pump unit in which the air compressor and the refrigerant pump are integrated into one unit are small. May be matched.

  That is, for example, when two or more disk-shaped mount members that support the refrigerant flow rate control valve, for example, supporting an air compressor or the like, are arranged in parallel in the radial direction, the radial direction of the mount member By setting the motor shaft direction of the motor provided in the refrigerant flow control valve in the orthogonal direction, vibration (swing) applied to the motor is buffered, and vibration toughness for the motor can be improved. .

  An arrangement structure of the refrigerant flow rate control valve in the fuel cell system capable of suitably buffering the vibration applied to the motor provided in the refrigerant flow rate control valve without increasing the size of the fuel cell system can be obtained. .

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a circuit configuration diagram of a fuel cell system to which a refrigerant flow rate control valve arrangement structure is applied in a fuel cell system according to an embodiment of the present invention.

<Configuration of fuel cell system>
As shown in FIG. 1, the fuel cell system 10 includes a refrigerant system 11 that circulates a refrigerant. The refrigerant system (cooling system) 11 includes a fuel cell stack 12 that generates electricity by an electrochemical reaction between a fuel gas (for example, hydrogen gas) supplied to the anode and an oxidant gas (for example, air) supplied to the cathode. And a radiator 14 that functions as a cooler for cooling the refrigerant, and a circulation passage (refrigerant passage) 16 for circulating the refrigerant between the fuel cell stack 12 and the radiator 14.

  The fuel cell system 10 includes a refrigerant pump 18 provided in the circulation passage 16 for circulating the refrigerant at a predetermined flow rate, and a passage provided in the bypass passage 20 for bypassing the radiator 14 through which the refrigerant flows. A flow path switching valve 22 that switches to either the circulation passage 16 or the bypass passage 20 and a refrigerant flow rate control valve 24 that controls the amount of refrigerant flowing along the circulation passage 16 are provided.

  The flow path switching valve 22 functions as a thermostat valve that is a temperature control mechanism that adjusts the flow rate of the refrigerant to the radiator 14 and adjusts the temperature of the refrigerant supplied to the fuel cell stack 12. Moreover, as a refrigerant | coolant which distribute | circulates the said refrigerant | coolant type | system | group 11, fluorinated carbon-type refrigerant | coolants, such as liquid refrigerant | coolants, such as ethylene glycol and an antifreeze, and CFC (trademark) are contained, for example.

  The fuel cell system 10 further includes an air supply system 26 that supplies air as an oxidant gas to the cathode of the fuel cell stack 12, and the air supply system 26 communicates with the cathode of the fuel cell stack 12. An air compressor 30 that supplies compressed air along the supply passage 28 and a humidifier 32 that humidifies the compressed air supplied from the air compressor 30 are provided.

  In this case, a single drive motor 34 that rotates the refrigerant pump 18 and the air compressor 30 coaxially and simultaneously is provided. That is, the motor shaft 34 a of the single drive motor 34 is shared by the rotation drive shaft of the refrigerant pump 18 and the rotation drive shaft of the air compressor 30, and the rotational motion of the motor shaft 34 a of the drive motor 34 is the same as that of the refrigerant pump 18. The rotary drive shaft and the rotary drive shaft of the air compressor 30 are provided so as to be transmitted simultaneously.

  Furthermore, the fuel cell system 10 includes a hydrogen supply system that supplies fuel gas (hydrogen gas) to the anode of the fuel cell stack 12, and this hydrogen supply system is a hydrogen that communicates with the anode of the fuel cell stack 12. A hydrogen tank (not shown) for supplying hydrogen gas along the supply passage 36 and a shut-off valve (not shown) for opening and closing the hydrogen supply passage 36 are provided.

  In the fuel cell system 10, a drive signal is derived for the drive motor 34 that energizes and deactivates the refrigerant pump 18 and the air compressor 30, and the valve is switched with respect to the flow path switching valve 22. An ECU (Electric Control Unit) functioning as a control means for deriving a signal (valve operation control signal) is provided. The ECU is constituted by an electronic control unit including a microcomputer including a RAM, a ROM, a CPU, an I / O port and the like (not shown).

  The fuel cell system 10 configured as described above is mounted on a fuel cell vehicle (not shown), and electric power generated by the fuel cell stack 12 is supplied to a travel motor (main motor) 38 (see FIG. 6) described later. The fuel cell vehicle travels as the tire rotates by the travel motor 38.

<Configuration of refrigerant flow control valve>
FIG. 2 is a schematic configuration diagram of a refrigerant flow rate control valve that controls (limits) the flow rate of the refrigerant flowing through the circulation passage. The refrigerant flow control valve 24 is formed of a so-called butterfly valve, and includes an inlet port 40a (see FIG. 3) into which the refrigerant fed from the refrigerant pump 18 is introduced and an outlet port 40b through which the refrigerant is led out to the fuel cell stack 12. (See FIG. 3) provided with a valve body 42, and a disc-shaped valve body 44 that is disposed inside the valve body 42 and opens and closes a refrigerant passage 43 that communicates the inlet port 40a and the outlet port. , A valve drive unit 48 that functions as a motor and rotationally drives the valve body 44 by a predetermined valve opening, and a rotation that transmits the rotational driving force of the valve drive unit 48 to the valve body 44. It is comprised from the driving force transmission part 50. FIG.

  The valve mechanism portion 46 is rotatably supported in the valve body 42 via a bearing (not shown) and is rotatably connected to the rotary shaft 52 so as to rotate integrally with the rotary shaft 52. A disc-shaped valve body 44 that moves, a pair of oil seals 54 a and 54 b that surround the outer peripheral surface of the rotary shaft 52 with the valve body 44 interposed therebetween, and the valve provided at one end of the rotary shaft 52. An opening sensor 56 that detects a valve opening (rotation angle) of the body 44 and a return spring 58 that is engaged with the rotating shaft 52 and returns the valve body 44 to an initial state.

  In this case, the planar shape (circular shape) of the valve body 44 has substantially the same shape as the cross section of the refrigerant passage 43 and is provided so as to rotate in a direction perpendicular to the refrigerant flow direction. That is, by adjusting the rotation angle of the valve body 44 that rotates integrally with the rotary shaft 52, the fully closed state in which the refrigerant is prevented from flowing along the refrigerant passage 43, and the refrigerant passage 43 The valve element 44 can be controlled to a desired valve opening degree between the fully opened state in which the refrigerant flows to the maximum. In FIG. 2, a normally open butterfly valve is employed, and a fully open state in which the valve element 44 is positioned substantially horizontally is shown. When the valve body 44 is fully closed, the circulation of the refrigerant through the circulation passage 16 is stopped, and the cooling action on the fuel cell stack 12 is stopped.

  The valve drive unit 48 is composed of a brushed DC motor, and includes a motor housing 60, a pair of stators (permanent magnets) 62 a and 62 b fixed to the inner wall of the motor housing 60 so as to face each other, and the rotating shaft 52. And a motor shaft 66 rotatably supported by a pair of bearings 64a and 64b, and a coil 68 wound around an iron core (not shown) and connected to the motor shaft 66 to rotate integrally. And a child 70. 2 and 3, the axial direction (motor shaft direction) of the motor shaft 66 disposed in the valve driving unit 48 is indicated by an arrow “motor shaft direction”. In this embodiment, a DC motor is described as an example of the motor. However, the present invention is not limited to this, and the motor includes at least a stepping motor (pulse motor), a servo motor, and the like. .

  The rotational driving force transmission unit 50 is formed on a pinion 72 attached to one end of the motor shaft 66, a first gear 74 that meshes with a tooth portion of the pinion 72, and a shaft portion 74 a of the first gear 74. The second gear 76 is engaged with the tooth portion and connected to the rotating shaft 52.

  In this case, by switching the direction of the current supplied to the coil 68 of the rotor 70, the rotational force is generated by the repulsive force and the attractive force of the magnetic force generated between the stators 62a and 62b and the rotor 70 (coil 68). Is generated. The rotational force generated by the valve drive unit 48 is transmitted to the rotary shaft 52 via the pinion 72, the first gear 74, and the second gear 76 connected to the motor shaft 66, and is fixed to the rotary shaft 52. The disc-like valve body 44 rotates and is set to a predetermined valve opening.

<Arrangement structure of refrigerant flow control valve>
FIG. 3 is a partial cross-sectional side view showing the arrangement structure of the refrigerant flow control valve, and FIG. 4 is a partial cross-sectional plan view of the refrigerant flow control valve shown in FIG.

  When the valve body 44 is fully closed, the refrigerant pipe between the refrigerant pump 18 and the refrigerant flow control valve 24 becomes high pressure, and the refrigerant flow control valve 24 shortens the pipe length of the refrigerant pipe that becomes high pressure. In addition, it is mounted on the outer side wall 30 a of the air compressor 30 in the vicinity of the refrigerant pump 18. In the present embodiment, an arrangement structure in which the mount member 80 that functions as the vibration-proof elastic body is provided between the refrigerant flow control valve 24 and the air compressor 30 is illustrated below, but the present invention is not limited thereto. For example, the anti-vibration elastic body includes a pump unit (not shown) in which the air compressor 30 and the refrigerant pump 18 are integrally formed as a unit between the refrigerant flow control valve 24 and the refrigerant pump 18. You may arrange | position between the refrigerant | coolant flow control valves 24.

  As shown in FIGS. 3 and 4, the refrigerant flow rate control valve 24 is fixed to the outer side wall 30 a of the air compressor 30 via a bracket 78 formed in a substantially L shape. Between the outer side wall 30a of the air compressor 30 and the bracket 78, for example, a mount member 80 made of an elastic body such as rubber is formed in a disk shape, and the mount member 80 is fastened with a bolt or the like. The member 82 is fastened to the air compressor 30.

  The mount member 80 functions as an anti-vibration elastic body so that the motor shaft direction of the valve drive unit 48 of the refrigerant flow rate control valve 24 and the vibration absorption direction of the mount member 80 match or substantially match. It is arranged. As described above, by causing the motor shaft direction and the vibration absorption direction to coincide or substantially coincide with each other, vibration in the motor shaft direction of the valve drive unit 48 provided inside the refrigerant flow control valve 24 is absorbed (buffered), and the motor Damage to the brush (not shown) and the coil 68 due to the vibration of the shaft 66 can be suitably avoided.

  In other words, a relatively large vibration is generated by attaching the refrigerant flow rate control valve 24 to the air compressor 30 via the mount member 80 so that the motor shaft direction and the vibration absorption direction of the mount member 80 match or substantially match. The vibration from the air compressor 30 is buffered, and the vibration is buffered to be applied to the valve drive unit 48 of the refrigerant flow rate control valve 24, so that the valve drive unit 48 can be suitably protected.

  Further, as shown in FIGS. 3 and 4, between the refrigerant pump 18 and the inlet port 40a of the refrigerant flow control valve 24 and between the outlet port 40b of the refrigerant flow control valve 24 and the fuel cell stack 12, A pair of piping tubes 84a and 84b made of a rubber elastic body are connected to each other. The pipe tubes 84 a and 84 b are once bent in a predetermined direction as viewed from the refrigerant flow rate control valve 24, and then fixed through a fixing member 86.

  In this case, the bending direction of the piping tubes 84a and 84b is set to a direction that coincides with or substantially coincides with the motor shaft direction of the valve drive unit 48 of the refrigerant flow control valve 24. At that time, the rubber pipe tubes 84a and 84b bent so as to coincide with the motor shaft direction have a spring property along the direction of the arrow A, so that the vibration applied to the refrigerant flow control valve 24 is more suitable. Can be absorbed into.

  Therefore, the motor shaft direction of the valve drive unit 48 of the refrigerant flow control valve 24, the vibration absorption direction of the mount member 80, and the bending direction of the rubber piping tubes 84a and 84b are set in the same direction or substantially the same direction. Thus, it is possible to appropriately reduce the vibration applied to the motor shaft 66 of the valve drive unit 48 and to avoid damage to the valve drive unit 48.

  As a result, for example, a relatively large vibration generated in the air compressor 30 due to the cooperative action of the vibration absorbing action by the mount member 80 and the vibration absorbing action by the rubber pipe tubes 84a and 84b, Various vibrations such as vibrations generated in the vehicle body and vibrations generated by the refrigerant flowing through the piping tubes 84a and 84b are suitably absorbed (buffered), and the vibration toughness with respect to the refrigerant flow control valve 24 can be improved.

  In the present embodiment, the piping tube 84a connected between the refrigerant pump 18 and the inlet port 40a of the refrigerant flow control valve 24, and the connection between the outlet port 40b of the refrigerant flow control valve 24 and the fuel cell stack 12 are connected. However, the present invention is not limited to this, and only one of the piping tubes 84a (84b) is bent in the same direction or substantially the same direction as the motor shaft direction. May be. In the present embodiment, since no buffer mechanism for buffering vibration is provided in the refrigerant flow control valve 24, the refrigerant flow control valve 24 is not increased in size, and the fuel cell system 10 is reduced in size and weight. Can be achieved.

  FIG. 5 schematically shows the spring properties of the pipe tubes 84a and 84b by replacing the pipe tubes 84a and 84b with spring members, and the spring properties of the pipe tubes 84a and 84b extending and contracting along the arrow A direction. Therefore, transmission of vibration to the refrigerant flow control valve 24 is preferably suppressed.

  6A is a side view showing the arrangement direction of the refrigerant flow rate control valve with respect to the air compressor, and FIG. 6B is an arrow view seen from the arrow X direction shown in FIG. 6A. The same components as those in FIG. 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 6A and 6B, the air compressor 30 is disposed so as to be supported at three points on the traveling motor 38 via first to third support members 88a to 88c. The first to third support members 88 a to 88 c have a bracket 90 having a lower end portion fixed to the traveling motor 38 and a rubber disc-shaped mount member 80 provided to the upper end portion, and are fixed by a fastening member 82. Has been. By supporting the air compressor 30 via the plurality of mount members 80, it is possible to suppress the vibration generated in the air compressor 30 from being transmitted to the travel motor 38.

  In this case, among the first to third support members 88a to 88c, the first support member 88a and the second support member 88b are arranged to face each other (see FIG. 6A), and the mount member of the first support member 88a. The radial direction of 80 and the radial direction of the mount member 80 of the second support member 88b are parallel to each other, and the radial direction of the mount member 80 of the third support member 88c is that of the first support member 88a and the second support member 88b. It is set to be orthogonal to the radial direction of the mount member 80.

  In other words, the mount member 80 of the first support member 88a is disposed on the front side of the fuel cell vehicle, the mount member 80 of the second support member 88b is disposed on the rear side, and the vehicle body as viewed from the rear side of the fuel cell vehicle. The mount member 80 of the third support member 88c is disposed on the left side of the first support member 88c.

  In this way, when the air compressor 30 is supported on the traveling motor 38 at three points via the plurality of mount members 80, the vibration / swing (swing range) applied to the air compressor 30 is as shown in FIG. ) And increases along the vehicle width direction (left and right direction) of the fuel cell vehicle, and decreases along the front-rear direction of the fuel cell vehicle as shown in FIG. In other words, the rotational moment in the compressor 30 increases along the vehicle width direction (left-right direction) of the fuel cell vehicle, and decreases along the front-rear direction of the fuel cell vehicle.

  Accordingly, in the present embodiment, the refrigerant flow control valve 24 is arranged so that the motor shaft direction of the valve drive unit 48 and the direction in which the air compressor 30 swings are coincident or substantially coincide with each other. The vibration given to 48 can be suppressed.

  Thus, the direction in which the swing range of the air compressor 30 to which the refrigerant flow control valve 24 is attached is small and the motor shaft direction of the valve drive unit 48 of the refrigerant flow control valve 24 are set in the same direction or substantially the same direction. Thus, the vibration with respect to the valve drive unit 48 is buffered, and damage to the valve drive unit 48 can be suitably avoided.

  In other words, two or more mount members 80 (the mount member 80 of the first support member 88a and the mount member 80 of the second support member 88b) that support the mounting partner member of the refrigerant flow rate control valve 24 are parallel in the radial direction. In the case where the refrigerant flow rate control valve 24 is disposed, the refrigerant flow rate control valve 24 extends in a direction perpendicular to the radial direction of the mount member 80 (the direction connecting the mount member 80 of the first support member 88a and the mount member 80 of the second support member 88b). By setting the motor shaft direction of the valve drive unit 48, vibration (swing) applied to the valve drive unit 48 is buffered, and vibration toughness with respect to the valve drive unit 48 can be improved.

  The direction of the motor shaft of the valve drive unit 48 provided in the refrigerant flow control valve 24 and the refrigerant pump 18 supported via a plurality of mounting members 80 instead of the air compressor 30 or the air compressor 30 and the refrigerant By matching the direction of small oscillation of a pump unit (not shown) in which the pump 18 is unitized with the pump 18, vibration toughness with respect to the valve drive unit 48 can be improved as described above.

1 is a circuit configuration diagram of a fuel cell system to which an arrangement structure of refrigerant flow rate control valves in a fuel cell system according to an embodiment of the present invention is applied. It is a schematic block diagram of the refrigerant | coolant flow control valve shown by FIG. It is a partial cross section side view which shows the arrangement structure of the said refrigerant | coolant flow control valve. It is a partial cross section top view of the refrigerant | coolant flow control valve shown by FIG. It is the schematic diagram which represented typically the spring property of the rubber piping tubes connected to the said refrigerant | coolant flow control valve. (A) is the side view which showed the arrangement | positioning direction of the refrigerant | coolant flow control valve with respect to an air compressor, (b) is the arrow line view seen from the arrow X direction shown by (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Fuel cell system 11 Refrigerant system 12 Fuel cell stack 18 Refrigerant pump 24 Refrigerant flow control valve 30 Air compressor 40a Inlet port 40b Outlet port 48 Valve drive part (motor)
66 Motor shaft (motor shaft)
80 Mount member (elastic body for vibration isolation)
84a, 84b Piping tube

Claims (2)

A fuel cell that generates electricity by an electrochemical reaction between a fuel gas and an oxidant gas; an air compressor that supplies air to the fuel cell as the oxidant gas; a refrigerant pump that circulates refrigerant along a refrigerant passage; and a motor. A refrigerant flow rate control valve that controls a flow rate of the refrigerant that cools the fuel cell, an inlet port through which the refrigerant is introduced, and an outlet port from which the refrigerant is led out. An arrangement structure of the refrigerant flow rate control valve in a fuel cell system including a piping tube,
A pump unit in which the refrigerant flow rate control valve and the air compressor, or between the refrigerant flow rate control valve and the refrigerant pump, or a unit in which the air compressor and the refrigerant pump are unitized, and the refrigerant flow rate. One of the vibration reducing direction of the vibration isolating elastic body provided between the control valve, the motor shaft direction of the motor, and the piping tube connected to the inlet port or the outlet port is formed of a rubber material. The arrangement structure of the refrigerant flow control valve in the fuel cell system, wherein the bending direction of the one pipe tube as viewed from the refrigerant flow control valve is set in the same direction. In the arrangement structure of the refrigerant flow rate control valve in the fuel cell system according to claim 1,
Two or more disk-shaped mount members that support the air compressor, the refrigerant pump, or the pump unit in which the air compressor and the refrigerant pump are unitized are arranged in parallel in the radial direction. In the meantime, the air compressor, the refrigerant pump, or the pump unit in which the air compressor and the refrigerant pump are integrated as a unit are perpendicular to the radial direction of the mount member, and the motor has a small swinging direction. The arrangement of the refrigerant flow rate control valves in the fuel cell system is characterized in that the motor shaft directions are set in the same direction.

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