JP2012225341A - Hydraulic power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic power generator capable of supplying power to electric equipment even in an environment without supply of power from a commercial power supply without putting a burden on the environment.SOLUTION: In a hydraulic power generator 21 having a water turbine 1A rotated by receiving a water current and a power generation part 1B converting the rotational power obtained by the water turbine 1A into electric power, the hydraulic power generator includes: a jet port 14E adjusting a flow rate and an angle of the water striking a vane 20 of the water turbine 1A and adjusting an opening area and/or the number so that rotational power allowing efficient power generation is obtained in response to the water turbine 1A; and a holding member 14' fixing a positional relationship between the jet port 14E and the water turbine 1A and forming a guide flow channel 14C guiding the water to the jet port 14E.

Description

  The present invention relates to a hydroelectric generator, and more particularly, to a hydroelectric generator that is installed corresponding to environments having different water flow conditions such as water pressure, flow rate, and pressure loss due to a faucet.

  Conventionally, effective utilization of energy resources has been carried out by using a hydroelectric generator in combination with a faucet equipped with an electromagnetic valve or the like for controlling the flow of water. Patent Document 1 describes a hydraulic turbine that includes a water turbine that is rotated by a water flow controlled by a faucet and a power generation unit that converts the rotational force of the water turbine into electric power. It becomes possible to generate electric power by using it.

JP 2004-100625 A

  However, in the configuration as shown in Patent Document 1, the ratio of change in water pressure and flow rate varies depending on the structure of the faucet by combining the faucet and the hydroelectric generator. There is a need to do it.

  For example, a faucet for hand-washing or a faucet for urinal washing has a relatively low flow rate and is likely to have a short opening time. A large amount of water flows through the stopper for a relatively long time.

  In addition, the amount of power required varies depending on the electrical equipment as a load. In the case of a system that requires relatively large power, such as a warm water toilet seat, heated toilet seat, footlight, and bathroom light, the hydroelectric generator must output a large amount of power. In the case of the system, the hydroelectric generator does not need to output a large amount of power.

  For this reason, when flowing a large amount of water to a hydroelectric generator in a system that requires a large amount of power, if the water applied to the hydraulic turbine is narrowed by a nozzle with a small opening area, this nozzle Since the load becomes large, a situation occurs in which a large flow of water cannot flow through the hydroelectric generator. Moreover, since the flow rate of the water sprayed from the nozzle becomes faster, there is a concern that the water turbine rotates at a higher speed and its life is shortened.

  On the other hand, in a system that consumes relatively little power, when flowing a small amount of water that has been squeezed by a faucet or the like to the hydroelectric generator, if the nozzle opening area is too large, Therefore, the flow velocity of the water acting on the water turbine becomes slow, the force applied to the water turbine becomes weak, and there arises a problem that the water turbine cannot rotate or cannot obtain enough power to be used effectively. In particular, in an automatic faucet for washing hands, the flow rate may be reduced by the user operating a manual valve provided in the flow path, which may result in the inability to generate power by the hydroelectric generator. there is a possibility. Therefore, in order to give a rotational force to the water wheel, it is necessary to apply water to the water wheel with a jet, and for that purpose, the nozzle shape needs to have a small diameter.

  In the conventional hydroelectric generator, the nozzle is formed in the main body block in which the water turbine is accommodated. Therefore, it is necessary to form a main body block having a different shape according to the environment in which the hydroelectric generator is installed. Design changes are required. For example, as shown in FIG. 2 of Patent Document 1, it may be possible to adopt a configuration in which the blades of a water turbine are rotated without changing the flow of water.

  The present invention has been made in consideration of the above-mentioned matters, and its purpose is to adjust the flow rate to suit different environments of water flow conditions such as water pressure, flow rate, and pressure loss due to faucets. It is an object of the present invention to provide a hydroelectric generator that can be used.

  In order to solve the above problems, a first invention is a hydroelectric generator having a water turbine configured to rotate by receiving a flow of water, and a power generation unit that converts rotational force obtained by the water turbine into electric power. An injection port having an opening area and / or number adjusted to adjust the angle and flow rate at which the water hits the blades of the turbine and to generate a rotational force that enables efficient power generation according to the turbine is provided. There is provided a hydroelectric generator characterized by comprising a holding member that fixes the positional relationship between the mouth and the water turbine and forms an introduction flow path for introducing water into the injection port (Claim 1).

  According to the hydraulic power generator having the above-described configuration, the opening area and / or the number of the injection ports are adjusted so as to generate a rotational force that enables efficient power generation according to the water turbine. It can be efficiently transmitted to the water turbine. Since the holding member forms an introduction flow path for introducing water into the injection port, water can be efficiently introduced into the injection port, and the injection port is formed in the holding member. The shape and opening area can be changed by replacing only the holding member, and only the mold of the small holding member needs to be corrected. Therefore, the shape and opening area can be easily adjusted to the water flow environment. By forming the injection port in the holding member, the number of molds for manufacturing the hydroelectric generator can be reduced.

  That is, when the flow rate of water is large, the pressure loss due to the hydroelectric generator can be reduced by increasing the opening area of the injection port and increasing the number of injection ports, and output relatively large power. can do. On the other hand, when the flow rate of water is small, by reducing the opening area of the injection port and reducing the number of injection ports, the water turbine can be rotated with a small flow rate, and electric power can be output.

  According to a second aspect of the present invention, in the hydraulic power generator having a water wheel configured to rotate in response to a flow of water and a power generation unit that converts a rotational force obtained by the water wheel into electric power, the water hits a blade of the water wheel. A nozzle body having an injection port whose opening area and / or number is adjusted to adjust the angle and flow rate and generate a rotational force that enables efficient power generation according to the water wheel, and the nozzle body and the water wheel A hydraulic power generator is provided, characterized by comprising a holding member that fixes the positional relationship and forms an introduction flow path for introducing water into the injection port (Claim 2).

  According to the hydraulic power generator having the above-described configuration, the opening area and / or the number of the injection ports are adjusted so as to generate a rotational force that enables efficient power generation according to the water turbine. It can be transmitted efficiently to the water wheel, and the rotational force that the water flow gives to the water wheel can be adjusted. The power generation unit has the most efficient rotation speed for generating power, but the opening area and / or number of the injection ports are adjusted so that the power generation unit has the most efficient rotation speed under normal water usage conditions. As a result, the power generation efficiency can be increased.

  Moreover, since the injection port is formed in the nozzle body, the water channel shape and the opening area of the injection port can be changed by replacing only a small nozzle body. In other words, in order to change the groove formed in the hydroelectric generator body as in the prior art, a large-scale mold correction is required. Can be easily adjusted to the water flow environment.

  When the position where the nozzle body and the holding member are joined is provided with a position shift prevention step (Claim 3), the position of the nozzle body with respect to the blades of the water turbine can be held more reliably, so that stable rotation of the water turbine is maintained. Can do.

  The injection port has a slit shape, the height of which is within the height of the blade of the turbine wheel, the opening area is adjusted by the height and / or width of the slit, and the circumference is different from the number of the blade of the turbine wheel. In the case where they are formed at equal intervals in the direction (Claim 4), the opening area can be easily adjusted, and the water sprayed from the spray port can be surely generated with a larger rotational force. Can be applied to the blades of the water wheel.

  Further, a rectifier circuit connected to the power generation unit of the hydroelectric generator for rectification, a storage voltage adjustment circuit connected to the rectifier circuit for adjusting the voltage to an appropriate voltage for storage, and adjusted by the voltage conversion circuit. A capacitor that stores the stored power, a discharge voltage adjustment circuit that adjusts the power stored in the capacitor to a voltage required for the load, and either the output of the discharge voltage adjustment circuit or the output of the primary battery are selectively connected. By providing a power supply unit that has a selective connection circuit, the capacitor can be further charged according to the power obtained from the power generation unit and the power stored in the capacitor, so the capacitor is fully charged from the initial charged state. The rotational force for rotating the water wheel to the state can be kept constant, and efficient power generation and storage can always be performed.

  As described above, according to the present invention, it is possible to achieve various flow rates by providing the minimum necessary component variations in accordance with the optimal water discharge flow rate that changes depending on the environment such as the faucet fitting including the solenoid valve and water pressure. Can be matched.

  Further, even when the faucet fitting is changed, the hydroelectric generator can be adjusted in accordance with this.

It is a figure showing the whole automatic faucet system composition using the hydroelectric generator of the present invention. It is a partial cutting top view which shows the structure of the hydroelectric generator of 1st Embodiment. It is a longitudinal cross-sectional view which shows the structure of the said hydroelectric generator. It is a top view which shows the modification of an injection nozzle. It is a longitudinal cross-sectional view which shows another modification of an injection nozzle. It is a top view which shows another modification of an injection outlet. It is a longitudinal cross-sectional view which shows the structure of the hydroelectric generator of 2nd Embodiment. (A) And (B) is the partial cutaway top view and longitudinal cross-sectional view which show the structure of the hydroelectric generator of 3rd Embodiment. (A)-(D) are the longitudinal cross-sectional view which shows the structure of the holding member used by 3rd Embodiment, a perspective view, a bottom view, and a side view.

  FIG. 1 is a block diagram showing a configuration of an automatic faucet system 2 using a hydroelectric generator 1 according to the present invention. The automatic faucet system 2 includes a hydroelectric generator 1 that generates power using a flow of water, A power supply unit 3 that stores the power generated by the hydroelectric generator 1 and supplies a stable power, and detects the human body using the power supplied from the power supply unit 3, thereby discharging and stopping water. An automatic faucet control circuit 4 that performs switching and an electromagnetic valve 5 that can cut off the flow of water are provided. Reference numeral 6 denotes a backup power source of the automatic faucet system 2 such as a primary battery, and 2A denotes a water outlet of the automatic faucet system 2.

  The power supply unit 3 includes a rectifier circuit 3A that converts AC power generated by the hydroelectric generator 1 into DC power, and a storage voltage adjustment circuit 3B that is connected to the rectifier circuit 3A and adjusts the voltage to an appropriate voltage for storage. The capacitor 3C for storing the power adjusted by the voltage conversion circuit 3B, the discharge voltage adjusting circuit 3D for adjusting the power stored in the capacitor 3C to a voltage required for the load, and the output of the discharge voltage adjusting circuit 3D or A selective connection circuit 3E for selectively connecting any one of the outputs of the backup power source 6;

  The automatic faucet control circuit 4 includes a power supply circuit 4A that receives power obtained from the power supply unit 3, an electromagnetic valve drive circuit 4B that opens and closes the electromagnetic valve 5, a control circuit 4C, and a human body detection sensor 4D. .

  The hydroelectric generator 1 includes a water wheel 1A inserted into a water flow and a power generation unit 1B connected to the water wheel 1A. The power generation unit 1B includes, for example, a rotor 1Ba including a permanent magnet and the rotor. And a fixing element 1Bb provided with a coil C disposed at a position close to 1Ba. Since the power generation unit 1B is provided with the coil C on the fixed element 1Bb side, electrical wiring to the coil C is facilitated, but the coil C may be provided on the rotor 1Ba side.

  As shown in FIGS. 2 and 3, the hydroelectric generator 1 according to the first embodiment includes a main body 10 having a female screw portion 10 </ b> A and a male screw portion 10 </ b> B at its ends so as to be interposed in a water flow path, The rotating shaft 12 that rotatably supports the water wheel 1A in the water wheel housing portion 11 formed in the water channel of the main body 10 and the angle and flow rate at which water hits the blades of the water wheel 1A are adjusted, and the water wheel 1A can be efficiently used. A nozzle body 13 having an injection port 13A, the opening area and / or number of which is adjusted so as to generate a rotational force capable of generating power, and the positional relationship between the nozzle body 13 and the water turbine 1A are fixed and water is injected. A holding member 14 that forms an introduction flow path to be introduced into the port 13A, a partition wall 15 that holds the water wheel 1A in a state where the water wheel 1A is housed in the water wheel housing portion 11 while the holding member 14 is pressed, and a partition wall 15 Magnetic material Comprising a coil holding portion 16 for fixing in a state of being arranged fixed element 1Bb including coil at a position close to the rotor 1Ba with.

  In addition, 10C is a bearing of the rotating shaft 12 provided in the main body 10, 15A is a bearing of the rotating shaft 12 provided in the partition wall 15, and 15B is sandwiched between the partition wall and the main body 10 to ensure a watertight state. It is a ring.

  The water turbine accommodating portion 11 is a substantially cylindrical space having an inner diameter that allows the water turbine 1A to be rotatably accommodated, and includes a guide wall 11A that guides the lower end portion of the water turbine 1A.

  The rotary shaft 12 supports the seven blades 20 provided in the water wheel 1A and supports the rotor 1Ba in connection.

  The nozzle body 13 is provided with four injection ports 13A in the circumferential direction thereof, and is fitted to the outer peripheral portion of the upper end portion of the guide wall 11A on the inner peripheral surface of the lower end portion thereof, thereby having a positional relationship with the water turbine 1A. A number of misalignment prevention steps 13C corresponding to the number of the injection ports 13A are provided on the outer peripheral surface of the portion having the concave portion 13B that is positioned and held at a fixed position and does not overlap the injection port 13A at the upper end thereof. Prepare.

  The shape of the injection port 13A provided in the nozzle body 13 is formed at an angle so that water can be injected as close to the circumferential direction as possible from the outer periphery as shown in FIG. 2, and the shape is a slit shape. It is. The height H can be set within the height of the blade 20 of the water turbine 1A, such as 1 to 3 mm, and the width W is 0.5 to 1.0 mm. That is, the product of the height H and the width W is the opening area of the injection port 13A, and the total opening area obtained by multiplying the opening area by the number of nozzles has a great influence on the water flow even at the maximum flow rate of water flowing through the power transmission mechanism 1. Set to a level that does not give In the present embodiment, four injection ports 13A having a height H of 3 mm and a width W of 1 mm are formed at equal intervals for each rotation angle of 90 ° so that a relatively large flow rate can flow. An example is shown.

  The holding member 14 includes the position deviation prevention means 14A fitted to the position deviation prevention means 13C, a protective flange 14B that protects the blades 20 of the water turbine 1A in a state where the water wheel 1A is housed in the water wheel accommodating portion 11, and a nozzle. A flow path forming flange 14D that forms an annular introduction flow path 14C between the stepped portions 10D of the main body 10 in a state where the body 13 is positioned at a predetermined position.

  The partition wall 15 is a metal plate that includes a cylindrical portion 15C interposed between the rotor 1Ba and the fixing element 1Bb, and an outer peripheral portion thereof is connected to the main body 10 while being watertight by the O-ring 15B. The coil holding portion 16 is a plate-like member that reliably keeps the watertight state by pressing the partition wall 15 against the main body 10.

  The blade 20 has a pressure receiving surface 20A for receiving water flowing from the outer periphery through the injection port 13A, and the number thereof is different from the number of the injection ports 13A, and preferably an odd number. In the present embodiment, seven blades are formed, but the present invention is not limited to seven blades 20. A cylindrical guide ring 20B is provided at a position corresponding to the guide wall 11A at the lower end portion of the blade 20, and even if the water turbine 1A rotates at a position deviated from the center by some force, the blade 20 directly It is comprised so that it may not collide with the target guide wall 11A and the nozzle body 13. FIG.

  Hereinafter, the operation of the hydroelectric generator 1 having the above-described configuration will be described using the automatic faucet system 2 of FIG. 1 as an example. When the automatic faucet system 2 detects that the sensor circuit 4D intermittently radiates sensor light such as infrared rays using the electric power obtained from the power supply unit 3 and the user reaches out, the control circuit 4C detects this detection signal. In response, the solenoid valve 5 is opened via the solenoid valve drive circuit 4B.

  When the solenoid valve 5 is opened, water flows into the main body 10 connected to the downstream side of the solenoid valve 5 using the female screw portion 10A and the male screw portion 10B, and the hydroelectric generator 1 generates power. At this time, the water flowing in from the female screw portion 10A is guided to the holding member 14 and the annular introduction passage 14C between the nozzle body 13 and the step portion 10D, and through the injection port 13A communicating with the introduction passage 14C. A flow rotating in the circumferential direction is formed and injected into the nozzle body 13.

  Since water injected from the injection port 13A is injected at an angle substantially perpendicular to the pressure receiving surface 20A of the blade 20, it is possible to give a powerful rotational force to the water turbine 1A. In addition, since the shape of the injection port 13A is a slit, it is efficiently injected into the outer portion of the blade 20 as a uniform laminar flow, so that a rotational force can be efficiently applied and the injection port 13A has a high height. Since the height H is within the height of the blade 20 of the water wheel 1A, the water to be sprayed surely generates a rotational force on the blade 20.

  The water which hits the blades 20 and gives a rotational force to the water wheel 1A flows downward in FIG. 3 and flows downstream through the male screw portion 10B, thereby discharging water from the water outlet 2A. Furthermore, since the number of the blades 20 and the number of the injection ports 13A are different, the relationship between the blades 20 and the injection ports 13A is different in the rotation direction, so that rotation unevenness can be suppressed as much as possible.

  On the other hand, the rotor 1Ba having a permanent magnet is rotated by the rotational force obtained by the water turbine 1A, whereby an AC electromotive force is generated in the coil C in the fixed element 1Bb. This AC power is converted into DC by the rectifier circuit 3A. Then, the voltage is adjusted to be adjusted to be stored in the capacitor 3C by the storage voltage adjustment circuit 3B. The two capacitors 3C1 and 3C2 connected in series need to stop the storage when one of the voltages V1 and V2 reaches the rated voltage (full storage). Are not the same voltage, the capacitors 3C1 and 3C2 are not fully charged.

  For example, when the voltage V1 of the capacitor 3C1 at the start of charging is higher than the voltage V2 of the capacitor 3C2, if the capacitors 3C1 and 3C2 are charged in the same manner, the capacitor 3C1 reaches the rated voltage earlier, but the charging is completed. A situation occurs in which the capacitor 3C2 does not reach the rated voltage, and a situation in which both the capacitors 3C1 and 3C2 cannot be fully charged occurs. Therefore, the storage voltage adjustment circuit 3B monitors the terminal voltages V1 and V2 of the capacitors 3C1 and 3C2, so that either of the capacitors 3C1 and 3C2 is not fully charged first, The stored voltage to each of the capacitors 3C1 and 3C2 is controlled so that 3C2 becomes the rated voltage in the same way (at the same time).

  The power stored in the capacitor 3C is adjusted by the discharge voltage adjustment circuit 3D so that the voltage is larger than the backup power supply 6, and the selective connection circuit 3E selectively supplies power from the discharge voltage adjustment circuit 3D side. Supply to circuit 4A. At this time, no current flows from the backup power supply 6, so the backup power supply 6 is not consumed.

  When the user stops using the automatic water tap, the sensor circuit 4D does not detect the user, and the control circuit 4C closes the electromagnetic valve 5 via the electromagnetic valve drive circuit 4B, thereby stopping the flow of water. Thus, the generation of electric power by the hydroelectric generator 1 is stopped. That is, when the automatic faucet control circuit 4 is driven using the electric power stored in the capacitor 3C and the capacitor 3C is completely discharged, the output voltage of the booster circuit 3D becomes lower than the output voltage of the backup power source 6, and hence the backup is performed thereafter. Power supply from the power source 6 is performed.

  In the hydraulic power generator 1 of the present invention, the flow rate of water flowing to the hydroelectric power generator 1 can be adjusted according to the environment by the injection port 13A provided in the nozzle body 13, so that, for example, an electromagnetic valve in the automatic faucet system 2 Even when a flow restrictor is provided on the upstream side of 5, or when used in an area where the water pressure is low, this can be dealt with.

  FIG. 4 is a view showing a modified example of the nozzle body 13 that is used when a flow passage restriction is provided in the automatic water faucet system 2. 4A shows a case where the number of injection ports 13A is three, FIG. 4B shows a case where the number of injection ports 13A is two, and FIG. 4C shows a case where the number of injection ports 13A is one. It is. As shown in FIGS. 4 (A) to 4 (C), by adjusting the number of injection ports 13A, the momentum of water injected from the injection ports 13A can be maintained even with a small flow rate. It is possible to apply a rotational force to 1A.

  FIG. 5 is a view showing another modification of the nozzle body 13. 5A shows an example in which the injection port 13A is formed at a height H1 that is 75% of the height of the blade 20, and FIG. 5B shows that the injection port 13A has a height H2 that is half the height of the blade 20. FIG. 5C shows an example in which the injection port 13A is formed at a height H3 that is 25% of the height of the blade 20. As shown in FIGS. 5A to 5C, the flow rate of water flowing to the hydroelectric generator 1 can also be adjusted by changing the heights H1 to H3 of the injection port 13A.

  FIG. 6 is a view showing still another modified example of the nozzle body 13. 6 (A) to 6 (C) show examples in which the width of the injection port 13A is adjusted to W1, W2, and W3, respectively. As shown in FIGS. 6 (A) to 6 (C), it is possible to adjust the flow rate of water flowing to the hydroelectric generator 1 by changing the widths W1 to W3 of the injection port 13A. Since the width W of the injection port 13A can be easily increased, it is suitable for increasing the flow rate of the hydroelectric generator 1.

  Moreover, it becomes possible to adjust the flow volume of the water sent to the hydroelectric generator 1 by a wide span by using the modification shown in FIGS. 4 to 6 in combination. In any case, when the hydroelectric generator 1 is installed in different environments such as the water pressure and flow rate of the water source and the pressure loss of the faucet, the number of the injection ports 13A is not changed without changing the overall structure of the hydroelectric generator 1. Since this can be dealt with by replacing the nozzle body 13 in which at least one of the height H and the width W is changed, the manufacturing cost can be minimized.

  FIG. 7 is a diagram illustrating a configuration of the hydroelectric generator 21 according to the second embodiment. In the example shown in FIG. 7, the difference from the hydroelectric generator 1 of the first embodiment is that the holding member 14 ′ includes four injection ports 14 </ b> E in the circumferential direction, and the guide is provided on the inner peripheral surface of the lower end portion. It is the point which has the recessed part 14F positioned and hold | maintained in the predetermined position which fixed the positional relationship with the water turbine 1A by fitting to the outer peripheral part of the upper end part of wall 11A. Since the other structure is the same as the hydroelectric generator 1 of 1st Embodiment, the detailed description is abbreviate | omitted.

  Also in the hydroelectric generator 21 of the second embodiment, the environment (water pressure, flow rate, water, etc.) where the hydroelectric generator 21 is installed is adjusted by adjusting the height H, width, and number of the injection ports 14E formed in the holding member 14 ′. It can be adjusted according to the pressure loss of the stopper.

  In other words, it is possible to adapt to the environment by changing the shape of the injection port 14E formed in the holding member 14 ′ without changing the overall configuration of the hydroelectric generator 21, so that it can be adapted to any environment at low cost. An installable hydroelectric generator 21 can be manufactured. In addition, since the number of parts can be reduced by one as compared with the hydroelectric generator 1 of the first embodiment, the number of molds can be reduced accordingly, and the manufacturing cost can be reduced accordingly.

  8A and 8B are diagrams showing the configuration of the hydroelectric generator 31 according to the third embodiment, and FIGS. 9A to 9D are diagrams showing the configuration of the holding member 14 ′ used in the hydroelectric generator 31. It is. The hydroelectric generator 31 of the third embodiment differs from the hydroelectric generator 21 of the second embodiment in the following points.

  First, the planar view shape of the main body 10 is not a rectangular shape but a substantially circular shape (see FIG. 8A), and is more compact. Further, the number of the injection ports 14E provided in the holding member 14 ′ is two instead of four (see FIGS. 8A and 8B and FIGS. 9A to 9D), and the blade 20 of the water turbine 1A is provided. Is 13 sheets instead of 7 sheets (see FIG. 8A).

  The installation position of the O-ring 15B sandwiched between the partition wall 15 and the main body 10 to ensure a watertight state is moved to the back side of the main body 10 from the position shown in FIG. 7 (FIG. 8B )reference).

  The permanent magnet M of the rotor 1Ba can be easily attached to the rotor body by a snap fit S (see FIG. 8B).

  A pair of iron cores 16A sandwiching the fixing element 1Bb from above and below is used as the coil pressing portion 16, and the tips of both iron cores 16A (parts facing the permanent magnet M) extend in the vertical direction and engage with each other in a range that does not contact each other. A tooth portion is provided.

  Since the structure of the other hydroelectric generator 31 of 3rd Embodiment is the same as the hydroelectric generator 21 of 2nd Embodiment, the detailed description is abbreviate | omitted.

DESCRIPTION OF SYMBOLS 1,21 Hydroelectric generator 1A Water wheel 1B Power generation part 13 Nozzle body 13A Injection port 14, 14 'Holding member 14C Introduction flow path 14E Injection port 20 Blade

Claims (4)

In a hydroelectric generator having a water turbine configured to rotate in response to a flow of water, and a power generation unit that converts rotational force obtained by the water turbine into electric power,
An injection port having an opening area and / or number adjusted to adjust the angle and flow rate at which the water hits the blades of the turbine and to generate a rotational force that enables efficient power generation according to the turbine is provided. A hydroelectric generator comprising: a holding member that fixes a positional relationship between the mouth and the water wheel and forms an introduction flow path for introducing water into the injection port. In a hydroelectric generator having a water turbine configured to rotate in response to a flow of water, and a power generation unit that converts rotational force obtained by the water turbine into electric power,
A nozzle body provided with an injection port whose opening area and / or number is adjusted so as to adjust the angle and flow rate at which the water hits the blades of the water wheel and generate a rotational force that enables efficient power generation according to the water wheel; A hydroelectric generator comprising: a holding member that fixes the positional relationship between the nozzle body and the water wheel and forms an introduction flow path for introducing water into the injection port.   The hydroelectric generator according to claim 2, further comprising a misalignment prevention step portion at a joint portion between the nozzle body and the holding member. The injection port has a slit shape, the height of which is within the height of the blade of the turbine wheel, the opening area is adjusted by the height and / or width of the slit, and the circumference is different from the number of the blade of the turbine wheel. The hydroelectric generator according to any one of claims 1 to 3, wherein the hydroelectric generator is formed at equal intervals in a direction.

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