JP2018072009A - Water quantity sensor device and water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water quantity sensor capable of suppressing false detection even when the flow rate of hot water to be detected is small.SOLUTION: A water quantity sensor device according to one embodiment of the present invention includes a water quantity detection unit, a bearing unit, and a flow regulating member. The water quantity detection unit has a rotating shaft and a waterwheel. The waterwheel includes a plurality of blades extending along the rotating shaft while being inclined with respect to the rotating shaft. The waterwheel rotates about the rotating shaft. The bearing unit is arranged on the upstream side of the water quantity detection unit in the flow of hot water. The bearing unit supports the rotating shaft. The bearing unit has a plurality of first ribs. The first rib extends in a direction intersecting the rotating shaft. The flow regulating member is arranged on the upstream side of the bearing unit in the flow of hot water. The flow regulating member regulates the flow of hot water. The flow regulating member has a plurality of second ribs. The second rib extends in a direction intersecting the rotating shaft. Each of the second ribs is disposed between adjacent first ribs as viewed from a direction parallel to the rotating shaft.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water amount sensor device and a hot water device.

  Conventionally, a water amount sensor described in Japanese Patent Publication No. 7-37906 (Patent Document 1) is known. The water amount sensor described in Patent Literature 1 includes a main body casing, a water amount detection unit, a rectification unit, and a sensor unit.

  The main body casing houses a water amount detection unit, a rectification unit, and a sensor unit, and has a substantially cylindrical shape. The water amount detection unit includes a rotation bearing and an impeller including a rotation shaft and a blade portion. The rotating bearing includes mixed flow blades. The rectification unit is disposed upstream of the water amount detection unit. A rectification | straightening part has a flat blade, and arranges the flow of the inflowing water. The sensor unit includes a sensor that detects the rotation of the impeller.

Japanese Patent Publication No. 7-37906

  However, in the water amount sensor described in Patent Document 1, no special consideration is given to the relative positional relationship between the mixed flow blade and the flat plate blade. For this reason, in the water amount sensor described in Patent Document 1, the impeller may rotate and the amount of water may be detected even if the flow rate of water to be detected is small. As a result, in the water amount sensor described in Patent Document 1, there is a risk of erroneous detection.

  The present invention has been made in view of the above-mentioned problems of the prior art. More specifically, the present invention provides a water amount sensor and a hot water device that can suppress erroneous detection when the flow rate of hot water to be detected is small.

  The water amount sensor device according to an aspect of the present invention includes a water amount detection unit, a bearing unit, and a rectifying member. The water amount detection unit has a rotating shaft and a water wheel. The water wheel includes a plurality of blades. The blades extend along the rotation axis while being inclined with respect to the rotation axis. The water wheel rotates about the rotation axis. A bearing part is arrange | positioned in the upstream of the flow of hot water rather than the water quantity detection part. The bearing portion supports the rotating shaft. The bearing portion has a plurality of first ribs. The first rib extends in a direction intersecting the rotation axis. The rectifying member is disposed upstream of the bearing portion in the hot water flow. The rectifying member rectifies hot water. The rectifying member has a plurality of second ribs. The second rib extends in a direction intersecting the rotation axis. Each of the second ribs is disposed between the first ribs adjacent to each other when viewed from the direction parallel to the rotation axis.

  In the water amount sensor according to one aspect of the present invention, each of the second ribs is disposed between adjacent first ribs. Therefore, the flow rate of the hot water that has passed between the second ribs is attenuated by contact with the first ribs. That is, the force by which the hot water that has reached the water amount detection unit rotates the water wheel is weakened by the first rib. Therefore, when the flow rate of hot water to be detected is small, the water turbine is difficult to rotate. Therefore, according to the water amount sensor device of one embodiment of the present invention, erroneous detection when the flow rate of hot water to be detected is small can be suppressed.

  In the water amount sensor device described above, the first rib and the second rib are 0.4 times or more and 0.6 times or less of an angle obtained by dividing 360 ° by the number of the first ribs when viewed from the direction parallel to the rotation axis. The angle may be made. In this case, when the hot water passing between the second ribs contacts the first rib, the direction of the hot water that has reached the water amount detection unit is inclined toward the direction in which the blades incline, and the direction in which the blades incline. Nearly parallel. As a result, the force that hot water that has reached the water amount detection unit rotates the water wheel is further weakened. Therefore, in this case, erroneous detection when the flow rate of hot water to be detected is small can be further suppressed.

  The hot water apparatus which concerns on 1 aspect of this invention is equipped with said water amount sensor apparatus and a flow volume adjustment part. The flow rate adjusting unit has a water inlet port, a first water outlet port, and a second water outlet port. The first water outlet port communicates with the water inlet port. The second water outlet port communicates with the water inlet port and is connected to the water amount sensor device. The flow rate adjusting unit adjusts the flow rate of hot water flowing from the water inlet port to the first water outlet port and the second water outlet port.

  The hot water device may further include a pouring electromagnetic valve. The pouring solenoid valve is connected to the water amount sensor device. In the hot water apparatus described above, the third pipe connected to the hot water supply passage having the first pipe connected to the water inlet port and the second pipe connected to the first water outlet port and the hot water solenoid valve. You may further provide the pouring route which has piping. The water amount sensor device may be formed integrally with the pouring electromagnetic valve.

  In the hot water device described above, even if hot water is flowing to the first output port side, a certain amount of hot water may also flow to the second outlet port side. When the dimensions of the flow rate adjustment unit and the water amount sensor are reduced, the distance between the water amount sensor device and the flow rate adjustment unit is reduced, and the flow rate of the hot water reaching the water amount sensor device is increased. As a result, the influence of the hot water flowing on the second water discharge port side cannot be ignored. Since the hot water device includes the water amount sensor device, even if a small amount of hot water flows to the second output port side, erroneous detection is unlikely to occur. Therefore, according to the hot water device of one embodiment of the present invention, erroneous detection when the flow rate of hot water to be detected is small can be suppressed.

  According to the water amount sensor device and the hot water device according to one aspect of the present invention, erroneous detection when the flow rate of hot water to be detected is small can be suppressed.

It is sectional drawing of the water quantity sensor apparatus which concerns on embodiment. It is a disassembled perspective view of the water quantity sensor apparatus which concerns on embodiment. It is a top view of the bearing part and rectification | straightening member in the water quantity sensor apparatus which concern on embodiment. It is a schematic diagram of the hot water apparatus which concerns on embodiment. It is sectional drawing in the vicinity of the flow volume adjustment part of the hot water apparatus which concerns on embodiment, and the pouring solenoid valve. It is sectional drawing of the water quantity sensor apparatus which concerns on a comparative example. It is a schematic diagram which shows the flow of the hot water in the water quantity sensor apparatus which concerns on embodiment. It is a schematic diagram of the hot water apparatus which concerns on a comparative example.

(Configuration of the water amount sensor device according to the embodiment)
Below, the structure of the water quantity sensor apparatus which concerns on embodiment is demonstrated with reference to FIGS. 1-3. In the drawings, the same or corresponding parts are denoted by the same reference numerals. Moreover, you may combine arbitrarily at least one part of embodiment described below. Furthermore, dimensional relationships such as length, width, thickness, and depth are changed as appropriate for clarity of the drawings, and do not represent actual dimensional relationships.

  As shown in FIGS. 1 and 2, the water amount sensor device according to the embodiment includes a water amount detection unit 1, a bearing unit 2, and a rectifying member 3. The water amount detection unit 1, the bearing unit 2, and the rectifying member 3 are accommodated in a housing 4. The housing 4 preferably has a cylindrical shape that is open at both ends.

  The water amount detection unit 1 is a part that detects the amount of hot water flowing through the water amount sensor device. The water amount detection unit 1 includes a rotating shaft 11 and a water wheel 12.

  The water wheel 12 has a water wheel main body 12a and a blade 12b. The turbine body 12a has a hollow cylindrical shape. For example, the water wheel main body 12a has a cylindrical shape. The turbine body 12a has an inner peripheral surface and an outer peripheral surface. The inner peripheral surface is a surface on the inner peripheral side of the turbine body 12a. The outer peripheral surface is a surface on the outer peripheral side of the turbine body 12a. A rotating shaft 11 is inserted on the inner peripheral surface side. Thereby, the water wheel 12 is attached to be rotatable about the rotation shaft 11.

  The blades 12b are formed on the outer peripheral surface. The blade 12 b is formed so as to be inclined with respect to the rotation shaft 11. More specifically, the blade 12b is inclined on the outer peripheral surface along the longitudinal direction of the turbine body 12a (that is, along the rotation shaft 11) while being inclined with respect to the longitudinal direction of the turbine body 12a (that is, rotated). It extends (inclined with respect to the axis 11).

  A part of the blade 12b is provided with a magnetic body (not shown) such as a magnet. Moreover, the water amount detection part 1 has a magnetic field detection part (not shown). The magnetic field detector is a Hall element, for example. As the blade 12b rotates, the magnetic field around the blade 12b changes. This change in the magnetic field is detected by the magnetic field detector. Thereby, the water quantity detection part 1 detects the quantity of the hot water flowing through the water quantity sensor.

  The bearing portion 2 includes a first bearing portion 21 and a second bearing portion 22. The bearing part 2 is a part which supports the rotating shaft 11 rotatably. The 1st bearing part 21 is arrange | positioned in the flow direction of the hot water used as a detection target at the upstream rather than the water quantity detection part 1. FIG. The 1st bearing part 21 has the center part 21a, the frame part 21b, and the 1st rib 21c.

  A concave portion 21aa is provided in the central portion 21a. One end of the rotating shaft 11 is inserted into the recess 21aa. Thereby, the rotating shaft 11 is rotatably supported by the first bearing portion 21. The frame part 21b is arranged around the center part 21a with a gap. In plan view (as viewed from a direction parallel to the rotation axis 11), the frame portion 21b has an annular shape.

  The first rib 21c connects the central portion 21a and the frame portion 21b. The first rib 21 c extends in a direction intersecting with the rotation shaft 11. Preferably, the first rib 21 c extends in a direction orthogonal to the rotation shaft 11. The first rib 21 c also extends in a direction parallel to the rotation shaft 11. A plurality of first ribs 21c are provided. Each of the first ribs 21c is arranged at equal intervals. The number of first ribs 21c is preferably four. However, the number of the first ribs 21c is not limited to this.

  The 2nd bearing part 22 is arrange | positioned rather than the water quantity detection part 1 in the direction of the flow of the hot water used as a detection target. The second bearing portion 22 has a recess 22a. The other end of the rotating shaft 11 is inserted into the recess 22a. Thereby, the rotating shaft 11 is rotatably supported by the second bearing portion 22.

  The rectifying member 3 is a part that rectifies hot water to be detected that flows into the water amount sensor. The rectifying member 3 is disposed on the upstream side of the first bearing portion 21 in the direction of the hot water to be detected.

  The rectifying member 3 includes an inner frame portion 31, an outer frame portion 32, and a second rib 33. The inner frame portion 31 and the outer frame portion 32 have an annular shape in plan view. The diameter of the outer frame portion 32 is larger than the diameter of the inner frame portion 31. In a plan view, the outer frame portion 32 is arranged on the outer side of the inner frame portion 31 with an interval. The flow regulating member 3 may have a water entry filter part 34. The water entry filter unit 34 is, for example, a collection net. The water entry filter unit 34 collects foreign matter mixed in the hot water to be detected. The water entry filter part 34 is arrange | positioned in the upstream end in the direction of the flow of the hot water used as a detection target.

  The second rib 33 connects the inner frame portion 31 and the outer frame portion 32. The second rib 33 extends from the outer periphery of the inner frame portion 31 toward the inner periphery of the outer frame portion 32 in a direction intersecting the rotation shaft 11. Preferably, the second rib 33 extends in a direction orthogonal to the rotation shaft 11. The second rib 33 also extends in a direction parallel to the rotation shaft 11. The width of the second rib 33 in the direction from the outer periphery of the inner frame portion 31 toward the inner periphery of the outer frame portion 32 may be narrower on the upstream side in the flow direction of hot water to be detected.

  A plurality of second ribs 33 are provided. The number of second ribs 33 is equal to the number of first ribs 21c. For example, when the number of the first ribs 21c is four, the number of the second ribs 33 is also four. The second ribs 33 are arranged at equal intervals in plan view.

  As shown in FIG. 3, each of the second ribs 33 is disposed between adjacent first ribs 21 c in plan view. That is, the second rib 33 is disposed at a position that does not overlap the first rib 21c in plan view.

  From another viewpoint, the angle θ formed by the first rib 21c and the second rib 33 exceeds 0 ° in plan view. Here, the angle θ is rotated more clockwise than the first rib 21c and the first rib 21c when the first bearing portion 21 and the rectifying member 3 are viewed from the first bearing portion 21 side. This is the angle formed by the second rib 33 closest to the position.

  The angle θ is preferably a value in a range of ± 20% of an angle obtained by dividing the angle of the adjacent first rib 21c by 2, and ± 10% of an angle obtained by dividing the angle of the adjacent first rib 21c by 2. A value in the range is more preferable. That is, the angle θ is preferably 0.4 to 0.6 times the value obtained by dividing 360 ° by the number of the first ribs 21c, and is preferably a value obtained by dividing 360 ° by the number of the first ribs 21c. More preferably, it is 0.45 times or more and 0.55 times or less. For example, when the number of the first ribs 21c is 4, the angle θ is preferably 36 ° or greater and 54 ° or less, and more preferably 40.5 ° or greater and 49.5 ° or less.

(Configuration of the hot water device according to the embodiment)
Below, the structure of the hot water apparatus which concerns on embodiment is demonstrated with reference to FIG.4 and FIG.5.

  As shown in FIG. 4, the hot water device according to the embodiment includes a flow rate adjusting unit 5 and a water amount sensor device 6. The water amount sensor device 6 is a water amount sensor device according to the above embodiment. The hot water device according to the embodiment includes a hot water supply channel 7, a pouring channel 8, and a pouring electromagnetic valve 9. The hot water supply channel 7 is a channel that supplies heated clean water to a currant or the like. The pouring channel 8 is a channel for supplying heated clean water to the bathtub 10.

  The flow rate adjusting unit 5 is a water amount servo, for example. As shown in FIG. 5, the flow rate adjustment unit 5 includes a main body 51, a valve body 52, a valve shaft 53, and a drive unit 54. The main body 51 has a water inlet port 51a, a first water outlet port 51b, a second water outlet port 51c, and a valve seat 51d. The flow rate adjusting unit 5 is a part that adjusts the flow rate of hot water flowing from the water inlet port 51a to the first water outlet port 51b and the flow rate of hot water flowing from the water inlet port 51a to the second water outlet port 51c.

  The water inlet port 51 a, the first water outlet port 51 b, and the second water outlet port 51 c are in communication with each other within the main body 51. One end of the pipe 71 is inserted into the water inlet port 51a. One end of the pipe 72 is inserted into the first water outlet port 51b. The water amount sensor device 6 is connected to the second water outlet port 51c. The valve seat 51d extends in a direction from the inner peripheral surface of the water inlet port 51a toward the center of the water inlet port 51a.

  The valve body 52 is disposed in the main body 51 so as to face the valve seat 51d. The valve body 52 has a flat plate shape, for example. The valve body 52 is provided with a through hole in the vicinity of the center. The valve body 52 is attached to the valve shaft 53 by inserting one end of the valve shaft 53 into the through hole. The other end of the valve shaft 53 is attached to the drive unit 54.

  The drive unit 54 moves the valve shaft 53 forward or backward. For the drive unit 54, for example, a stepping motor or the like is used. Thereby, the space | interval of the valve body 52 and the valve seat 51d changes, and the flow volume of the hot water which flows into the 1st outflow port 51b and the 2nd outflow port 51c from the inflow port 51a is adjusted.

  The other end of the pipe 71 is connected to one end of the heat exchanger 74. One end of a pipe 73 is connected to the other end of the heat exchanger 74. The other end of the pipe 73 is connected to the water supply. A burner 75 is disposed in the vicinity of the heat exchanger 74. The heat exchanger 74 heats clean water supplied from the pipe 73 by heat exchange with the combustion gas emitted from the burner 75.

  The heated clean water flowing through the pipe 71 is supplied to a currant or the like connected to the other end of the pipe 72 via the flow rate adjusting unit 5 and the pipe 72. That is, the pipe 71, the pipe 72, and the pipe 73 constitute the hot water supply channel 7.

  The pouring electromagnetic valve 9 has a main body 91, a valve body 92, a plunger 93, and an electromagnetic solenoid 94. The main body 91 has a water inlet 91a, a water outlet 91b, and a valve seat 91c. A space is formed inside the main body 91. The internal space of the main body 91 communicates with the outside at the water inlet 91a and the water outlet 91b. The valve seat 91 c is disposed inside the main body portion 91.

  The valve body 92 is disposed at a position facing the valve seat 91 c inside the main body 91. The valve body 92 is attached to the plunger 93. The electromagnetic solenoid 94 moves the plunger 93 forward or backward. Thereby, opening / closing between the valve body 92 and the valve seat 91c is performed, and opening / closing of the pouring electromagnetic valve 9 is switched.

  A water volume sensor device 6 is connected to a water inlet 91 a of the pouring electromagnetic valve 9. The water amount sensor device 6 may be formed integrally with the pouring electromagnetic valve 9. More specifically, the water inlet 91 a of the pouring electromagnetic valve 9 may be the housing 4 of the water amount sensor device 6.

  One end of a pipe 81 is connected to the water discharge portion 91 b of the pouring electromagnetic valve 9. The bathtub 10 is connected to the other end of the pipe 81. When the hot water solenoid valve 9 is opened, the heated clean water flowing through the pipe 71 is supplied to the bathtub 10 via the hot water solenoid valve 9 and the pipe 81 (note that the hot water solenoid valve 9 Is closed when heated water is supplied to the currant or the like via the hot water supply channel 7). That is, the pipe 81 constitutes the pouring channel 8. The water amount sensor device 6 detects the amount of hot water flowing through the pouring channel 8.

(Effects of water volume sensor device and hot water device according to embodiment)
Below, the effect of the water quantity sensor apparatus which concerns on embodiment is demonstrated by contrasting with a comparative example.

  As shown in FIG. 6, the water amount sensor device according to the comparative example includes a water amount detection unit 1, a bearing unit 2, a rectifying member 3, and a housing 4, similarly to the water amount sensor device according to the embodiment. Yes. However, unlike the water amount sensor device according to the embodiment, the water amount sensor device according to the comparative example is arranged such that the second rib 33 overlaps the first rib 21c. That is, in the water amount sensor device according to the comparative example, the angle θ is 0 °.

  In the water amount sensor device according to the comparative example, as described above, the first rib 21c and the second rib 33 are disposed so as to overlap each other, so that hot water passing between the second ribs 33 is transferred to the first rib 21c. Do not touch. Therefore, in the water amount sensor device according to the comparative example, the hot water reaches the water amount detection unit 1 without the flow rate being attenuated. Therefore, in the water amount sensor device according to the comparative example, the water wheel 12 is likely to rotate even when the flow rate of hot water to be detected is small. That is, in the water amount sensor device according to the comparative example, there is a high possibility that erroneous detection occurs when the flow rate of hot water to be detected is small.

  On the other hand, in the water amount sensor device according to the embodiment, as described above, since the first rib 21c and the second rib 33 are arranged so as not to overlap, the hot water passing between the second ribs 33 is the first. It contacts the rib 21c. As a result, the flow rate of the hot water reaching the water amount detection unit 1 is attenuated, and the force for rotating the water wheel 12 is weakened. Therefore, in the water amount sensor device according to the embodiment, it is difficult for erroneous detection to occur when the flow rate of hot water to be detected is small.

  As shown in FIG. 7, in the water amount sensor device according to the embodiment, when the angle θ is not less than 0.4 times and not more than 0.6 times the value obtained by dividing 360 ° by the number of the first ribs 21c, The hot water that has passed between the two ribs 33 is inclined in a direction in which the blades 12b are inclined by contact with the first ribs 21c (see arrows in FIG. 7). That is, the traveling direction of the hot water passing between the second ribs 33 becomes close to the direction in which the blades 12b are inclined by the contact with the first ribs 21c.

  Therefore, in this case, the hot water that has reached the water amount detection unit 1 is further weakened in the force of rotating the water wheel 12, and the false detection is less likely to occur when the flow rate of the hot water to be detected is small.

  Below, the effect of the hot water apparatus which concerns on embodiment is demonstrated by contrasting with a comparative example.

  As shown in FIG. 8, the hot water device according to the comparative example is similar to the hot water device according to the embodiment in that the flow rate adjusting unit 5, the hot water supply channel 7, the pouring channel 8, and the pouring electromagnetic valve 9 are provided. have. The hot water device according to the comparative example includes a water amount sensor device 6a. The water amount sensor device 6a is a water amount sensor device according to the above comparative example.

  The hot water solenoid valve 9 is closed, the valve body 52 of the flow rate adjusting unit 5 and the valve seat 51d are almost fully opened, and hot water is supplied from a currant or the like via the hot water supply passage 7. In this state, the hot water from the water inlet port 51a flows mainly to the first water outlet port 51b side. Even in this state, a small amount of hot water flows also to the second water outlet port 51c side.

  As described above, in the water amount sensor device 6a, even if the amount of hot water reaching the water amount detection unit 1 is small, the water wheel 12 is likely to rotate. Therefore, in the hot water device according to the comparative example, the water amount sensor device 6a is poured even though the pouring electromagnetic valve 9 is closed due to the influence of a small amount of hot water flowing toward the second water outlet port 51c. There is a risk of erroneous detection that hot water has flowed into the flow path 8.

  In particular, when the flow rate adjusting unit 5 and the water amount sensor device 6a are downsized, the distance between the water amount sensor device 6a and the flow rate adjusting unit 5 is shortened, and the momentum of hot water flowing into the water amount sensor device 6a is relatively strong. Become. Therefore, in the hot water device according to the comparative example, when the flow rate adjustment unit 5 or the water amount sensor device 6a is downsized, the above-described erroneous detection is further likely to occur.

  On the other hand, as described above, in the water amount sensor device 6, when the amount of hot water reaching the water amount detection unit 1 is small, the water wheel 12 is difficult to rotate. Therefore, according to the hot water device according to the embodiment, even if a small amount of hot water flows to the second water outlet port 51c side, it flows into the water amount sensor device 6 due to the downsizing of the flow rate adjusting unit 5 or the water amount sensor device 6. Even if the momentum of the hot water becomes relatively strong, it is difficult for the water amount sensor device 6 to erroneously detect that the hot water has flowed into the pouring channel 8. As a result, according to the hot water device according to the embodiment, it is possible to accurately determine the failure of the pouring electromagnetic valve 9.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is shown not by the above-described embodiment but by the scope of claims, and is intended to include meanings equivalent to the scope of claims and all modifications within the scope.

  DESCRIPTION OF SYMBOLS 1 Water quantity detection part, 11 Rotating shaft, 12 Water wheel, 12a Water wheel main body, 12b Blade | wing, 2 Bearing part, 21 1st bearing part, 21a Center part, 21aa Recessed part, 21b Frame part, 21c 1st rib, 22 2nd Bearing part, 22a Concave part, 3 Current regulating member, 31 Inner frame part, 32 Outer frame part, 33 Second rib, 34 Incoming filter part, 4 Housing, 5 Flow rate adjusting part, 51 Main body part, 51a Incoming port, 51b First Water outlet port, 51c Second water outlet port, 51d Valve seat, 52 Valve body, 53 Valve shaft, 54 Drive unit, 6, 6a Water quantity sensor device, 7 Hot water supply channel, 71, 72, 73 Piping, 74 Heat exchanger, 75 Burner, 8 Pouring channel, 81 Piping, 9 Pouring solenoid valve, 91 Main body, 91a Inlet, 91b Outlet, 91c Valve seat, 92 Valve body, 93 Plunger, 94 Electromagnetic solenoid Ido, 10 bathtub.

Claims (6)

A water amount detection unit having a rotation shaft and a water wheel that rotates around the rotation shaft and includes a plurality of blades extending along the rotation shaft while being inclined with respect to the rotation shaft;
A bearing unit that is disposed upstream of the water amount detection unit in the flow of hot water, supports the rotating shaft, and has a plurality of first ribs extending in a direction intersecting the rotating shaft;
A plurality of second ribs arranged on the upstream side in the flow of the hot water from the bearing portion, extending in a direction intersecting the rotation axis, and a rectifying member for rectifying the hot water,
Each of the second ribs is a water amount sensor device that is disposed between the first ribs adjacent to each other when viewed from a direction parallel to the rotation axis.   The first rib and the second rib form an angle that is not less than 0.4 times and not more than 0.6 times the angle obtained by dividing 360 ° by the number of the first ribs when viewed from a direction parallel to the rotation axis. The water amount sensor device according to claim 1.   The water flow sensor device according to claim 1, wherein the rectifying member has a water filter part. The water amount sensor device according to any one of claims 1 to 3,
A water inlet port; a first water outlet port that communicates with the water inlet port; and a second water outlet port that communicates with the water inlet port and to which the water amount sensor device is connected. A hot water apparatus comprising: a flow rate adjusting unit that adjusts a flow rate of hot water flowing through the first water discharge port and the second water discharge port. A pouring solenoid valve connected to the water volume sensor device;
A hot water supply passage having a first pipe connected to the water inlet port and a second pipe connected to the first water outlet port;
The hot water apparatus according to claim 4, further comprising a pouring channel having a third pipe connected to the pouring solenoid valve.   The hot water device according to claim 5, wherein the water amount sensor device is formed integrally with the pouring electromagnetic valve.

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