JP6155140B2 - Photosensitive panel drive device for tracking sunlight - Google Patents

Description

  In the present invention, a solar panel (solar panel), a solar heat collector, or the like that receives sunlight and uses the energy (hereinafter referred to as “light receiving panel” in this specification) is the most resistant to sunlight. The present invention relates to a light receiving panel driving device that tracks sunlight so as to be directed in a direction where light can be effectively received.

  2. Description of the Related Art Conventionally, a solar light tracking device is known in which a light receiving panel such as a solar cell panel (solar panel) or a solar heat collector is directed to an angle at which light can be received most effectively with respect to sunlight. For example, the structure which changes the angle of attack while rotating the support | pillar of a solar cell module is known (refer patent document 1, 2).

  Also, a solar power generation system is known in which the inclination angle (attack angle) and azimuth angle (turning angle) of the solar cell panel with respect to the panel mounting column are changed by a turning cylinder and a undulation cylinder, respectively (see Patent Document 2).

  In this photovoltaic power generation system, the cylinder-driven fluid pressure circuit is a hydraulic / pneumatic pressure conversion means for undulation control (for tilt angle adjustment) that converts air pressure (compressed gas pressure) to oil pressure (incompressible fluid pressure). And a hydraulic / pneumatic pressure converting means for turning control (for adjusting the azimuth angle) for converting air pressure (compressed gas pressure) into hydraulic pressure (incompressible hydraulic pressure).

  In this solar power generation system, the fluid pressure circuit has a pneumatic circuit (compressed gas pressure circuit as a compressed gas supply source) for supplying compressed air (compressed gas) to the hydraulic pressure / pneumatic pressure converting means, It has a hydraulic control circuit for cylinder drive control for driving and controlling the undulation cylinder and the swing cylinder with the hydraulic pressure from the air pressure conversion means.

JP 2003-322418 A Japanese Patent Laying-Open No. 2005-039148 JP 2012-054381 A

  The solar light tracking devices described in Patent Documents 1 and 2 are gears and worm gears (screws) at any one of the azimuth angle and the angle of attack so that the light receiving panel is directed to the most effective angle with respect to sunlight. Or other mechanical transmission means.

  Such mechanical transmission means such as gears and worm gears have backlash and the like necessary for meshing of the gears, so when tracking sunlight, the light receiving panel flutters, etc., and is always smooth and stable. It cannot be moved, and it causes wear and breakage of the tooth surface, the azimuth angle and angle of attack change greatly, and the sunlight cannot be accurately tracked. There is also a problem in durability.

  In the photovoltaic power generation system described in Patent Document 3, a swing cylinder and a undulation cylinder are used. In order to drive the swing cylinder and the undulation cylinder, hydraulic / pneumatic pressure conversion means for undulation control, and for the swing control are used. It has a hydraulic pressure / pneumatic pressure conversion means (for adjusting the azimuth angle) and a pneumatic circuit for supplying compressed air (compressed gas) to the hydraulic pressure / pneumatic pressure conversion means, and has a large energy loss for driving the pneumatic pump motor. .

  Accordingly, the structure becomes complicated, and the swivel cylinder and the undulation cylinder use a single rod type cylinder. Therefore, when the rod extends from the cylinder, the volume of the cylinder chamber opposite to the rod, and the rod The volume of the cylinder chamber on the rod side when drawn into the cylinder is different from the volume of the rod.

  Therefore, a tank (or a replenishing device) that absorbs the fluid of this different volume is required, and the configuration of the hydraulic circuit becomes complicated.

  The present invention solves such a conventional problem and realizes a light receiving panel driving device that tracks sunlight that drives the light receiving panel toward an angle at which light can be received most effectively with respect to sunlight. Is an issue.

  In order to solve the above-described problems, the present invention provides a light receiving panel, a column, a cylinder mounting bracket, a first directional tilt angle driving cylinder, a second directional tilt angle driving cylinder orthogonal to the first directional direction, and a fluid pressure. A light receiving panel driving device for tracking sunlight having a circuit, the lower surface of the light receiving panel being supported by the upper end of a support column so as to be tiltable in all directions, and a first direction tilt angle driving cylinder And the second direction tilt angle drive cylinder is driven so that the tilt angle is changed toward the first direction direction and the second direction direction, and the first direction tilt angle drive cylinder and the second direction direction are driven. The tilt angle drive cylinder is a double rod type cylinder having a drive rod extending from one end side thereof to change the tilt angle of the light receiving panel and a floating rod extending from the other end side. Providing a light-receiving panel driving device for tracking the sun, which is a dust.

  In order to solve the above-described problems, the present invention tracks sunlight including a light receiving panel, a column, a cylinder mounting bracket, a first directional tilt angle driving cylinder, a second directional tilt angle driving cylinder, and a fluid pressure circuit. A light receiving panel driving device, the lower surface of the light receiving panel is supported on the upper end of the support column so as to be tiltable in all directions, and the first direction tilt angle driving cylinder and the second direction driving cylinder Is a double rod type cylinder provided with a drive rod and a floating rod respectively extending from both sides of the piston, and the drive rod of the first direction-direction tilt angle drive cylinder is the lower surface of the light receiving panel and is in the first direction Is supported so as to be tiltable in all directions, and the drive rod of the second direction-direction tilt angle drive cylinder is the lower surface of the light receiving panel. And is supported so as to be tiltable in all directions on either side of the second direction, the fluid pressure circuit includes a fluid pump and a channel switching valve, and the channel switching valve is The piston is connected to the drive chamber on the drive rod side of the piston and the idle chamber on the floating rod side, and the fluid pump is switched by a flow path switching valve to send fluid to either the drive chamber or the idle chamber. Provided is a light receiving panel driving device that tracks sunlight.

  The center of the lower surface of the light receiving panel is supported by the upper end of the support column, and the drive rod of the first direction inclination angle driving cylinder passes through the center of the light receiving panel and is centered on the first direction line extending in the first direction. The drive rod of the second directional tilt angle drive cylinder supported on either side is either side with respect to the center on the second directional line extending in the second directional direction through the center of the light receiving panel. It is preferable that the structure is supported by the above.

  The fluid used for the first direction-direction tilt angle drive cylinder and the second direction-direction tilt angle drive cylinder is preferably a vehicle coolant.

According to the light receiving panel driving apparatus for tracking sunlight according to the present invention, the following effects are produced.
(1) It is not the structure which turns a support | pillar according to the movement of the sun. Since the configuration is controlled by the tilt angle drive cylinder, there is no mechanism such as a reduction gear and a drive screw, and the overall configuration is simplified.

  Since both rod type fluid cylinders are used as the east-west tilt angle drive cylinder and the north-south tilt angle drive cylinder, the total volume of fluid does not change regardless of the position of the piston. There is no increase or decrease in the fluid in the fluid pressure circuit based on the change in volume that occurs when it is closed or pulled.

  Therefore, a tank or the like for absorbing the fluid of the changed volume is unnecessary, and the cost can be reduced. In addition, it is possible to drive the light receiving panel accurately so that the light receiving panel is directed to an angle at which light can be received most effectively with respect to sunlight, thereby effectively utilizing solar energy.

It is the perspective view which looked at the Example of the light reception panel drive device which tracks sunlight of this invention from diagonally upward. It is the perspective view which looked at the Example of the light reception panel drive device which tracks sunlight of this invention from the downward direction. It is a figure explaining a part of light-receiving panel drive device of the said Example. It is a figure explaining the fluid pressure circuit of the light reception panel drive device of the said Example, (a) is a figure which shows the whole structure of a fluid pressure circuit, (b) is a figure explaining the modification of a fluid pressure circuit. is there. It is a block diagram explaining the outline | summary of the structure which controls the pump and three-position solenoid valve of the said Example.

  EMBODIMENT OF THE INVENTION Embodiment for implementing the light-receiving panel drive device which tracks sunlight which concerns on this invention is described with reference to drawings based on an Example.

(overall structure)
1-5 is a figure explaining the Example of the light-receiving panel drive device which tracks the sunlight based on this invention. As shown in FIGS. 1 and 2, the light receiving panel driving device 1 for tracking sunlight according to the present invention includes a light receiving panel 2, a support column 3, a cylinder mounting bracket 4, and a first direction-direction tilt angle driving cylinder. 5 and a second direction-direction tilt angle drive cylinder 6.

  In the present specification, the “direction direction” in the “first direction direction” and the “second direction direction” means a predetermined direction (eg, east) and a direction (west) opposite to the predetermined direction. ) (Eg, east-west direction). And “any one of the first direction directions” refers to a predetermined direction (eg, east) or the opposite direction (west). The same applies to the second direction, and “any one of the second directions” refers to a predetermined direction (eg, south) or the opposite direction (north).

  The light receiving panel 2 is a solar cell panel (solar panel), a solar heat collector, a solar condensing reflector solar light collector, etc., and uses solar energy (sunlight or solar heat) to generate power, collect heat, collect heat. It is used for light and lighting. In this embodiment, the light receiving panel 2 has a rectangular plate shape, but may have a circular or polygonal outer shape and may be curved like a concave mirror. In the light receiving panel 2 in FIG. ) Is shown.

  In the present embodiment, for example, as shown in FIG. 2, the light receiving panel 2 has one pair of sides directed in a first direction (for example, east-west direction) and the other pair of sides set in a first direction. Installed in a second direction perpendicular to the direction (for example, north-south direction).

  Here, the configuration in which the first direction direction and the second direction direction are orthogonal includes a configuration in which the first direction and the second direction are orthogonal to each other. If the light receiving panel is tilted toward the sun by the first direction tilt cylinder 5 and the second direction tilt cylinder 6, the first direction and the second direction are not orthogonal. Even if it is a structure, the structure which cross | intersects at an appropriate angle may be sufficient.

  In FIG. 2, for convenience of explanation, a first direction line 13 extending in the first direction (for example, the east-west direction) passing through the center 12 of the lower surface 11 of the light receiving panel 2 and the second direction passing through the center 12 are shown. The second direction direction lines 14 extending in the direction direction (for example, north-south) are indicated by alternate long and short dash lines.

  Although the lower end of the column 3 is not shown, it is fixed to the ground or a building, and the light receiving panel 2 can be tilted in all directions by a joint 17 or the like as shown in FIG. Is attached. The mounting location is preferably the center 12 of the lower surface 11 of the light receiving panel 2 in consideration of the stability of the tilting operation and the like.

  The cylinder mounting bracket 4 is fixed to the column 3, and is used to mount the first direction-direction tilt angle drive cylinder 5 and the second direction-direction tilt angle drive cylinder 6. FIG. 3 is a view showing a more specific configuration of the cylinder mounting bracket 4. As shown in FIG. 3, the cylinder mounting bracket 4 includes a column fixing member 18 and a pair of cylinder support members 19.

  The column fixing member 18 fixes the entire cylinder mounting bracket 4 to the column 3 by being fixed to the column 3 with screws or the like. The pair of cylinder support members 19 are U-shaped, and are rotatably attached to the column fixing members 18 by pins 20. The pair of cylinder support members 19 respectively support the first direction-direction tilt angle drive cylinder 5 and the second direction-direction tilt angle drive cylinder 6 by a pin 20 so as to be tiltable.

  Each of the first direction-direction tilt angle drive cylinder 5 and the second direction-direction tilt angle drive cylinder 6 is a double rod type, and each has a piston 24 as shown in FIG. A drive rod 25 having a base end fixed to one surface of the piston 24 extends outward from one end side of the cylinders 5 and 6, and an idle rod 26 having a base end fixed to the other surface of the piston 24 is provided. The cylinders 5 and 6 extend outward from the other end side.

  As shown in FIG. 3, the tip of the first direction-direction tilt angle drive rod 25 is one of the first direction directions on the lower surface 11 of the light receiving panel 2 (for example, east-west if east-west direction). A ball joint (which may be a cruciform joint) 27 is attached to any one side so as to be tiltable in all directions.

  Further, the tip of the second direction-direction tilt angle drive rod 25 is either one of the second direction directions on the lower surface 11 of the light receiving panel 2 (for example, one of the north and south in the case of the north-south direction). On the side, a ball joint (which may be a cross joint) 27 is attached to be tiltable in all directions.

  More preferably, specifically, in the present embodiment, the tip of the first directional tilt angle drive rod 25 is mounted on the first directional line 13 extending in the first directional direction on the lower surface 11 of the panel. ing. The tip of the second direction-direction tilt angle drive rod 25 is attached on the second direction-direction line 14 extending in the second direction on the lower surface 11 of the light receiving panel 2.

(Fluid pressure circuit)
A fluid pressure circuit 31 of the light receiving panel driving apparatus 1 for tracking sunlight according to the present invention will be described with reference to FIG. The first direction-direction tilt angle drive cylinder 5 and the second direction-direction tilt angle drive cylinder 6 are each provided with fluid pressure circuits 31 having exactly the same configuration, so here the first direction-direction tilt angle drive cylinder is provided. The fluid pressure circuit 31 for the cylinder 5 will be described, and the description of the fluid pressure circuit 31 for the second directional tilt angle drive cylinder 6 will be omitted.

  Of the two chambers defined by the piston 24 of the first direction-direction tilt angle drive cylinder 5, in this specification, the drive rod 25 side is referred to as a “drive chamber”, and the idle rod 26 side chamber is referred to as an “idle chamber”. " The drive chamber 32 and the idle chamber 33 are each communicated with the fluid pressure circuit 31. A three-position electromagnetic valve 36 and a fluid pump 37 are disposed in the fluid pressure circuit 31.

  That is, the outlet-side flow path 38 of the fluid pump 37 is connected to the first hole 41 of the three-position electromagnetic valve 36, and the inlet-side flow path 39 of the fluid pump 37 is connected to the second hole 42 of the three-position electromagnetic valve 36. Yes. The flow path 45 from the drive chamber 32 is connected to the third hole 43 of the three-position electromagnetic valve 36, and the flow path 46 from the idle chamber 33 is connected to the fourth hole 44 of the three-position electromagnetic valve 36.

  The three-position solenoid valve 36 functions as a flow path switching valve. However, instead of the three-position solenoid valve 36, a two-position three-way valve 59 is used as a modification of the fluid pressure circuit as shown in FIG. It is good also as the structure which used individually.

  4A and 5, the three-position electromagnetic valve 36 and the pump 37 take in the sun direction information signal 47 from the tracking sensor 49 that recognizes the direction of the sun, and drive signals to the three-position electromagnetic valve 36 and the pump 37. In response to the drive signal from the pump / solenoid valve control device 50 that outputs the pump 37, the pump 37 is driven so that the light receiving panel has an optimum inclination angle, and the switching operation of the three-position solenoid valve 36 is performed. .

  Or, a pump / solenoid valve control that incorporates an algorithm (program) that determines the direction of the sun from information such as position (latitude, longitude, altitude, etc.) and time (year, month, day, hour, minute, second). In response to the drive signal from the device 50, the pump 37 is driven and the three-position solenoid valve 36 is switched to open and close so that the light receiving panel has an optimum inclination angle.

  The present invention is characterized by a light receiving panel drive mechanism for driving the light receiving panel 2, and the tracking sensor and algorithm control for controlling the switching opening and closing of the three-position electromagnetic valve 36 are not directly subject to the invention. Since there is no description, the detailed explanation is omitted.

  As the fluid pump 37, an electromagnetic fluid pump, a gear fluid pump, or the like is used. The fluid pump 37 receives the signal from the pump / solenoid valve control device 50 and performs an on-off operation. However, when the solenoid valve is closed, the pump is turned off. 38 (the flow path from the outlet of the fluid pump 37 to the first hole 41 of the three-position solenoid valve 36) does not become overpressure.

  As described above, since the first direction-direction tilt angle drive cylinder 5 and the second direction-direction tilt angle drive cylinder 6 are both rod-type cylinders, the piston 24 is driven at any position (for example, driven from the cylinder). In principle, the capacity in the fluid pressure circuit 31 does not fluctuate even when the rod is fully extended and retracted. Therefore, an auxiliary tank (or a replenishing tank) for the fluid that is necessary in the case of fluctuation is unnecessary.

  Depending on the structure of the fluid pressure circuit, the fluid may leak and decrease, or depending on the environment in which the fluid is used, the fluid may contract due to a drop in ambient temperature. As a result, the fluid pressure circuit 31 may have a negative pressure, causing air to enter from the outside and causing problems such as unstable fluid operation.

  In order to solve such a problem, as indicated by a dotted line in FIG. 4A, an auxiliary tank 54 is optionally connected in parallel to each other in the inlet side flow path 39 of the fluid pump 37 in the auxiliary tank flow path 57. It is good also as a structure connected through the stop valve 55, the check valve 56, and the relief valve 58 which are arrange | positioned.

  The check valve 56 may not be operated at all times, but may be used when the flow rate in the fluid pressure circuit 31 decreases and the fluid pressure circuit 31 becomes negative pressure. In the case of an overpressure state due to the volume expansion of the fluid due to an increase in the ambient air temperature, it is possible to cope with this by appropriately designing the strength of the piping material of the fluid pressure circuit, but a relief valve 58 is provided. The fluid may be allowed to escape to the auxiliary tank 54, and when the temperature drops again, the fluid is returned to the fluid pressure circuit 31 through the check valve 56. The stop valve 55 is normally closed, but is opened when it is necessary to replenish the fluid pressure circuit 31 with fluid.

  The volume of the fluid pressure circuit 31 including the fluid pump 37, the solenoid valve 36, and the first direction-direction tilt angle drive cylinder 5 does not change, and a fluid having a flow rate corresponding to the volume is filled in the fluid pressure circuit 31. . Since the fluid pressure circuit 31 is a closed circuit, basically the fluid filled in the fluid pressure circuit 31 is separated from a change caused by a small amount of leakage from the first direction-direction tilt angle drive cylinder 5. The flow rate does not change.

  As the fluid, vehicle coolant or the like is used. For example, it is a coolant having a lifetime of 10 years or longer, including an ethylene glycol (30% to 50%) aqueous solution, a leakage inhibitor, a corrosion inhibitor, a rust inhibitor, and the like. The reason for this is that such a vehicle coolant has a low freezing temperature and solidifies when it leaks and touches the air, so it rarely continues to ooze out like hydraulic oil, and is also available when it becomes necessary. Easy.

(Function)
The operation of the light receiving panel driving apparatus 1 for tracking sunlight having the above configuration will be described. In FIG. 5, in response to the feedback signal 47 from the tracking sensor 49, the pump / solenoid valve control device 50 sends a drive signal to the three-position solenoid valve 36 and the fluid pump 37 to correct the deviation from the optimum inclination angle of the light receiving panel. The three-position solenoid valve 36 is appropriately opened and closed, and the fluid pump 37 is turned on and off to control the cylinder so that the light receiving panel 2 has an optimum inclination angle.

  In this case, first, the first direction-direction tilt angle drive cylinder 5 is controlled to tilt the light receiving panel 2 to the optimum tilt angle with respect to the first direction-direction angle, and then the second direction-direction tilt angle drive. The cylinder 6 is controlled to tilt the light receiving panel 2 to the optimum tilt angle with respect to the angle in the second direction. The order may be simultaneous or reverse.

  Specifically, in the fluid pressure circuit 31 of the first directional tilt angle drive cylinder 5, the three-position solenoid valve 36 performs an appropriate opening / closing operation to send the fluid from the fluid pump 37 to the drive chamber 32 and the drive rod. 25 is pulled into the first direction-direction tilt angle drive cylinder 5 and the idle rod 26 is extended, or fluid from the fluid pump 37 is sent into the idle chamber 33 and the idle rod 26 is sent to the first direction-direction tilt angle. The retractable drive rod 25 is extended into the drive cylinder 5.

  In this manner, the light receiving panel 2 faces the sun around the joint 17 of the center 12 of the light receiving panel 2 by operating the first direction-direction tilt angle driving cylinder 5 to expand and contract the drive rod 25. Tilt to adjust the angle of the light receiving panel 2 in the first direction.

  Next, in the fluid pressure circuit 31 of the second direction-direction tilt angle drive cylinder 6, the three-position solenoid valve 36 performs an appropriate opening / closing operation to send the fluid from the fluid pump 37 to the drive chamber 32 and to drive the drive rod 25. The idle rod 26 is drawn into the second direction-direction tilt angle drive cylinder 6 or the idle rod 26 is extended, or the fluid from the fluid pump 37 is sent into the idle chamber 33 and the idle rod 26 is sent to the second direction-direction tilt angle drive cylinder 6. The retractable drive rod 25 is extended inside.

  In this manner, the light receiving panel 2 faces the sun around the joint 17 of the center 12 of the light receiving panel 2 by operating the second direction-direction tilt angle driving cylinder 6 to extend and contract the drive rod 25. Tilt to adjust the angle of the light receiving panel 2 in the second direction.

  As described above, by sequentially adjusting the angle of the light receiving panel 2 in the first direction and the inclination angle of the light receiving panel 2 in the second direction, the light receiving panel 2 is most effective for sunlight. The angle can be adjusted to an angle at which light can be received (in the case where the front face of the panel faces the sun, or in the case of using a mirror on the light receiving panel and reflecting in another direction).

  In the light receiving panel driving device 1 that tracks sunlight, the light receiving panel 2 itself is not configured to rotate, but the first direction inclination angle driving cylinder 5 and the second direction inclination angle driving cylinder 6 are sequentially operated to receive light. Since the panel 2 is tilted in the direction of the sun, the light receiving panel 2 can be tilted in a balanced and stable manner, and the output wire may be wound around the support column and damaged like a swivel solar panel. There is no.

  Without using mechanical transmission means such as gears that cause backlash, the first direction-direction tilt angle drive cylinder 5 and the second direction-direction tilt angle drive cylinder 6 are both rod-type cylinders, Since the pressure circuit is a closed circuit, the flow rate of the fluid does not change depending on whether the drive rod is extended or retracted from the cylinder.

  Accordingly, a tank (or a tank for replenishment) for absorbing the amount of change in the flow rate of the fluid due to the stroke of the piston is unnecessary, the configuration of the fluid pressure circuit can be simplified, and the cost can be reduced. . Further, since there is no influence on the operation of the drive rod due to the flow resistance, etc. that occurs when such a tank is provided, the drive rod 25 is operated smoothly, and the light receiving panel 2 is accurately It is possible to tilt.

  As mentioned above, although the form for implementing the light-receiving panel drive device which tracks sunlight concerning the present invention was explained based on the example, the present invention is not limited to such an example, and claims It goes without saying that there are various embodiments within the scope of the technical matters described in the scope.

  In the above embodiment, the light receiving panel 2 has been described. As such a light receiving panel, a lens is attached to the surface (eg, a concentrating power generation element module), a mirror surface is formed to collect sunlight, and light energy. Alternatively, a light collecting device or a daylighting device that uses thermal energy may be used.

  The light receiving panel driving device for tracking sunlight according to the present invention having the above-described configuration includes a solar energy utilization device (eg, solar power generation device, daylighting device, etc.), a solar thermal energy utilization device (eg, solar thermal power generation device, solar heat). It can be applied to various solar energy utilization devices such as hot water heaters, etc., and it can be used as a driving range for the entire sky, which is a feature of this proposal. Therefore, the present invention can be applied to a tracking driving device loaded on a moving body such as a ship, or a tracking type in a place where the sun is located in any direction of east, west, south, and north, just below the equator.

1 Light receiving panel drive
2 Light receiving panel
3 props
4 Cylinder mounting bracket
5 First direction tilt angle drive cylinder
6 Second direction tilt angle drive cylinder
11 Underside of light receiving panel
12 Center of bottom
13 First direction line
14 Second direction line
17 Ball joint
18 Prop fixing member
19 Cylinder support member
20 pins
24 piston
25 Drive rod
26 idle rod
27 Ball joint
31 Fluid pressure circuit
32 Drive room
33 Playroom
36 Three-position solenoid valve
37 Fluid pump
38 Fluid outlet side flow path
39 Inlet flow path of fluid pump
41 First hole of 3-position solenoid valve
42 2nd hole of 3 position solenoid valve
43 Third hole of 3-position solenoid valve
44 4th hole of 3 position solenoid valve
45 Flow path from drive room
46 Flow path from idle room
47 Solar direction information signal 54 Auxiliary tank
55 Stop valve
56 Check valve 57 Auxiliary tank flow path 58 Relief valve 59 Two-position three-way valve

Claims (4)

A light receiving panel for tracking sunlight comprising a light receiving panel, a column, a cylinder mounting bracket, a first direction tilt angle drive cylinder, a second direction tilt angle drive cylinder orthogonal to the first direction, and a fluid pressure circuit A driving device comprising:
The lower surface of the light receiving panel is supported by the upper end of the support column so as to be tiltable in all directions. The first direction direction tilt angle driving cylinder and the second direction direction tilt angle driving cylinder support the first direction direction. And the tilt angle is driven toward the second direction,
The first direction-direction tilt angle drive cylinder and the second direction-direction tilt angle drive cylinder each have a drive rod extending from one end side thereof to change the tilt angle of the light receiving panel, and an idle rod extending from the other end side. A light receiving panel driving device for tracking sunlight, wherein the light receiving panel driving device is a double rod type cylinder. A light receiving panel driving device for tracking sunlight comprising a light receiving panel, a column, a cylinder mounting bracket, a first direction tilt angle driving cylinder, a second direction tilt angle driving cylinder, and a fluid pressure circuit. The lower surface of the column is supported by the upper end of the column so that it can tilt in all directions.
The first direction-direction tilt angle drive cylinder and the second direction-direction drive cylinder are double-rod type cylinders having a drive rod and a floating rod extending from both sides of the piston,
The drive rod of the first direction-direction tilt angle drive cylinder is supported to be tiltable in all directions on either side of the first direction direction on the lower surface of the light-receiving panel,
The drive rod of the second direction tilt angle drive cylinder is supported so as to be tiltable in all directions on the lower surface of the light receiving panel and on either side of the second direction.
The fluid pressure circuit has a fluid pump and a flow path switching valve,
The flow path switching valve is connected to the driving chamber on the drive rod side of the piston and the idler chamber on the floating rod side, and the fluid pump is switched by the flow path switching valve to supply fluid to either the driving chamber or the idle chamber A light receiving panel driving device for tracking sunlight, characterized by being sent. The center of the lower surface of the light receiving panel is supported by the upper end of the column,
The drive rod of the first direction tilt angle drive cylinder is supported on either side with respect to the center on the first direction line extending through the center of the light receiving panel in the first direction direction,
The drive rod of the second direction tilt angle drive cylinder is supported on either side with respect to the center on the second direction line extending through the center of the light receiving panel in the second direction. The light-receiving panel drive device which tracks sunlight according to claim 2.   4. The sun according to claim 1, wherein the fluid used in the first direction-direction tilt angle drive cylinder and the second direction-direction tilt angle drive cylinder uses a vehicle coolant. A light receiving panel drive that tracks light.

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