JP2011069475A - Automatic faucet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic faucet having a configuration including a power generator for generating electric power by receiving action of the water flowing in a water flow passage formed by a faucet body and a fixed flow rate valve for limiting quantity of water to be discharged from a discharge port to the fixed quantity in the inside of the faucet body and capable of facilitating removal of the fixed flow rate valve from the faucet body. <P>SOLUTION: This automatic faucet incorporates a mixing valve 5 for adjusting temperature of water and hot water, a solenoid valve for opening and closing the water flow passage 10, and a sensor for detecting a user in the faucet body 3. The faucet body 3 has a cover part constituted by a plurality of cover members to prevent its disassembling. The mixing valve 5 is constituted as an assembly unit 50 being integrally removable from the faucet body 3 without requiring disassembly of the cover part. The fixed flow rate valve 30 is arranged in the inside of the mixing valve 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an automatic faucet that automatically discharges water by detecting a user's hand or the like.

  2. Description of the Related Art Conventionally, there is an automatic faucet that discharges water only while detecting a hand or the like that has been provided by a user by a sensor. Such automatic faucets are highly convenient, and are hygienic because non-contact water discharge (water outflow / stop) is performed, and there is no “forgetting to close” by the user. In addition, it is spreading widely because of its high water-saving effect.

  The automatic water stop function in such an automatic water faucet includes an electromagnetic valve that opens and closes a water passage to a water outlet from which water is discharged, and a control unit that controls opening and closing of the electromagnetic valve based on the output of the sensor. Realized by configuration. Some automatic faucets are equipped with a generator that generates electric power under the action of water flowing through a water passage in order to supply electric power to a sensor, a solenoid valve, a control unit, and the like. By providing a generator in the automatic faucet, an external power source is not required, and the degree of freedom in installing the automatic faucet is dramatically improved. And in the automatic faucet, for the purpose of downsizing, etc., the solenoid valve, the control unit, and the generator are installed on the installation surface of the counter of the wash basin etc. to the faucet body that constitutes the spout Some are built in (see, for example, Patent Document 1 and Patent Document 2).

  Such an automatic faucet includes, for example, a constant flow valve for limiting the amount of water discharged from the water outlet to a certain amount inside the faucet body as described in Patent Document 1. is there. In an automatic water faucet equipped with a constant flow valve, the flow rate of water flowing through the water passage is limited by the constant flow valve, so that the performance of the generator may not be fully utilized. In other words, according to the constant flow valve, since the pressure loss about the water flowing through the water passage becomes large, it may not be possible to secure the desired amount of power generation in the generator, and the performance of the generator may not be fully demonstrated. is there. Such a phenomenon caused by the operation of the constant flow valve is likely to occur when sufficient pressure cannot be obtained for water supplied to the automatic faucet at the installation site of the automatic faucet.

  Therefore, for an automatic faucet equipped with a constant flow valve, it may be necessary to remove the constant flow valve from the faucet body in order to ensure the amount of power generated by the generator, depending on the situation at the installation site. However, as in Patent Document 1, for example, in a conventional automatic faucet, a constant flow valve accommodated in the faucet body is supported with respect to a faucet body part that forms an accommodation space such as an electromagnetic valve. . For this reason, the work for removing the constant flow valve from the faucet body is troublesome due to the support structure of the constant flow valve for the faucet body and the relationship with other parts built into the faucet body such as a solenoid valve. There is a problem that it takes. Specifically, when removing the constant flow valve from the faucet body, an operation of disassembling the faucet body composed of a plurality of members is required.

  On the other hand, some automatic faucets have a configuration capable of adjusting the temperature of water discharged from the spout by mixing hot water and water supplied to the faucet body. As a configuration for adjusting the temperature of the water discharged from the water outlet, a mixing valve for adjusting the mixing ratio of hot water and water supplied to the faucet body is provided, for example, as in Patent Document 1. And this mixing valve is comprised as an assembly unit which can be removed integrally by pulling out with respect to a faucet body, without requiring decomposition | disassembly of a faucet body.

JP 2008-248474 A JP 2004-336882 A

  The present invention has been made in view of the background art as described above, and the problem to be solved is the effect of the water flowing in the water passage formed by the faucet body inside the faucet body. Provide an automatic faucet that can easily remove the constant flow valve from the faucet body in a configuration that includes a generator that generates electricity and a constant flow valve for limiting the amount of water discharged from the spout to a certain amount There is to do.

  The automatic faucet of the present invention is discharged from the faucet by adjusting the mixing ratio of hot water and water supplied to the faucet body through a predetermined path and the faucet body constituting the spout. A temperature control unit for adjusting the temperature of hot water, a solenoid valve that opens and closes a water passage formed inside the faucet body, a generator that generates power by the action of hot water flowing through the water passage, and a user A sensor for detecting, and a control unit for controlling opening and closing of the solenoid valve based on an output signal from the sensor, and the temperature control unit, the solenoid valve, and the sensor are incorporated in the faucet body The water faucet body has an outer edge portion that is configured to be disassembled by a plurality of cover members, and the temperature adjusting portion is configured to remove the water without requiring disassembly of the outer edge portion. Assembly unit that can be removed integrally with the plug body And is intended to be constructed, the temperature control unit, the constant flow valve for the hot water discharge amount is limited to a certain amount from the water discharge port is one that is provided. With such a configuration, the constant flow valve can be easily removed from the faucet body without disassembling the outer edge composed of a plurality of cover members, so depending on the situation of the automatic faucet installation site The required constant flow valve removal work and the constant flow valve maintenance work accompanying the removal of the constant flow valve are facilitated.

  Preferably, the solenoid valve is a diaphragm type solenoid valve having a valve member movably provided so as to open and close the water passage according to a pressure difference between the upstream side and the downstream side in the water passage. The adjusting portion is provided on the upstream side in the water passage with respect to the electromagnetic valve. With such a configuration, a sufficient pressure difference is obtained between the upstream side and the downstream side of the solenoid valve by the flow of hot water previously limited by the constant flow valve, so that it is not affected by the pressure loss due to the constant flow valve, The performance of the diaphragm type solenoid valve can be ensured.

  In addition, it is preferable that a strainer that allows hot water led to the constant flow valve to pass therethrough is provided in the temperature control unit. With such a configuration, the strainer can be easily taken out from the faucet body together with the temperature control unit, so that the strainer can be easily maintained.

  Preferably, the temperature adjustment unit is provided so as to perform an operation according to an operation for adjusting the temperature of the hot water, and forms a mixing space for joining the hot water and water, and the hot water supply path. A first opening capable of communicating with the mixing space and a second opening capable of communicating the water supply path with the mixing space, and through the first opening by the operation. A valve body that adjusts a mixing ratio of the hot water and water by changing a communication area of the mixing space with respect to the hot water supply path and a communication area of the mixing space with respect to the water supply path through the second opening. And a support member that supports the strainer with respect to the valve body and forms a hole portion that secures the water passage, and allows the hot water that has passed through the strainer to pass through the hole portion, and is fixed to the valve body. And a nut member that forms an opening for securing the water passage on the downstream side of the support member in a state of being fixed to the valve body, and includes the strainer and the support The member and the constant flow valve are supported in a state of being sandwiched between the valve body and the nut member fixed to the valve body. With such a configuration, since the constant flow valve and the strainer are only held inside the valve body by the nut member, the constant flow valve and the strainer can be easily removed, and the maintenance thereof can be easily performed. it can.

  Preferably, the nut member has a slit portion for tightening the valve body by the screw portion. With such a configuration, the attaching / detaching operation of the nut member with respect to the valve body can be easily performed, so that the maintenance operation of the constant flow valve and the strainer can be simplified.

  According to the present invention, in order to limit the amount of water discharged from the water generator and the generator that generates electricity under the action of the water flowing through the water passage formed by the water faucet body to the inside of the faucet body, to a certain amount. The constant flow valve can be easily removed from the faucet body.

The side sectional view showing the whole automatic faucet composition concerning one embodiment of the present invention. 1 is a front cross-sectional view showing an overall configuration of an automatic faucet according to an embodiment of the present invention. Explanatory drawing which shows the structure of the mixing valve which is a temperature control part. The partial expanded sectional view which shows the structure of the mixing valve which is a temperature control part. The disassembled perspective view which shows the structure of the mixing valve which is a temperature control part.

  The present invention provides an automatic faucet having a constant flow valve in a faucet body that incorporates a solenoid valve or the like, and disposing the constant flow valve in a temperature control portion that is detachably provided to the faucet body. Therefore, it is intended to facilitate the removal of the constant flow valve from the faucet body, which may need to be removed depending on the situation of the installation site of the automatic faucet. Embodiments of the present invention will be described below.

  First, the whole structure of the automatic faucet 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. The automatic faucet 1 is installed on an installation surface 2 such as a counter of a washstand, for example. The automatic faucet 1 includes a faucet body 3 that is a part fixed on the installation surface 2 and that constitutes the water outlet 4.

  The faucet body 3 includes a base portion 3a that is a columnar portion configured in a direction substantially perpendicular to the installation surface 2, and a side opposite to the side fixed to the installation surface 2 of the base portion 3a (upper side in FIG. 1). A horizontal portion 3b extending from the end portion in a substantially horizontal direction (a direction substantially perpendicular to the base portion 3a). The faucet body 3 is formed in a substantially L shape as a whole by the base 3a and the horizontal portion 3b.

  The water discharge port 4 is configured by attaching a foam cap 4 a as a water discharge port member to an opening 3 c formed at the tip of the horizontal portion 3 b of the faucet body 3. The water outlet 4 is provided so as to open, for example, facing a wash bowl or the like included in the washstand. In the following description, the direction perpendicular to the installation surface 2 (the vertical direction in FIG. 1) is the vertical direction of the automatic water faucet 1.

  The automatic faucet 1 is of a hot and cold mixed type. For this reason, the automatic faucet 1 includes a mixing valve 5 for adjusting the temperature of hot water discharged from the water outlet 4. That is, in the automatic faucet 1, hot water and water supplied to the faucet body 3 through a predetermined path are mixed in the mixing valve 5, and hot water with adjusted temperature is discharged from the spout 4.

  Specifically, as shown in FIG. 2, in the faucet body 3, a hot water supply port 7 to which a hot water supply pipe 6 to which hot water is supplied is connected and a water supply port to which a water supply pipe 8 to which water is supplied are connected. 9 are formed. Hot water obtained by a hot water heater (not shown) or the like is supplied to the hot water supply pipe 6, and water guided from tap water or the like is supplied to the water supply pipe 8. Then, the hot water supplied from the hot water supply pipe 6 to the faucet body 3 and the water supplied from the water supply pipe 8 to the faucet body 3 are mixed at an adjustable mixing ratio in the mixing valve 5. The water is discharged from the water outlet 4 through the water passage 10 formed inside. The mixing valve 5 is provided in the lower part of the base 3 a of the faucet body 3.

  The temperature adjustment of the hot and cold water by the mixing valve 5 is performed by rotating the handle 20 provided outside the faucet body 3. That is, the mixing valve 5 operates so as to change the mixing ratio between the hot water supplied from the hot water supply pipe 6 and the water supplied from the water supply pipe 8 in conjunction with the operation of the handle 20. For this reason, the handle 20 is connected and fixed to the mixing valve 5 via the opening 3d formed in the lower part of the base 3a of the faucet body 3. As described above, in the automatic faucet 1, the mixing valve 5 adjusts the mixing ratio of hot water and water supplied to the faucet body 3 through a predetermined path to thereby discharge hot water discharged from the water outlet 4. It functions as a temperature control unit for adjusting the temperature.

  The automatic faucet 1 discharges water from the water outlet 4 by detecting a hand or the like that is provided by the user. For this reason, the automatic water tap 1 includes a sensor 11 for detecting a user. The sensor 11 is disposed in the vicinity of the water outlet 4 in the faucet body 3 (see FIG. 1).

  Specifically, the sensor 11 is provided so as to follow the foam cap 4 a constituting the water discharge port 4. The sensor 11 is provided such that its directing direction substantially coincides with the hot water discharge direction from the water outlet 4.

  Thus, the hot water obtained by the mixing valve 5 is automatically discharged from the water outlet 4 through the water passage 10 in a state where the user is detected by the sensor 11 provided in the vicinity of the water outlet 4. The On the other hand, in a state where the user is not detected by the sensor 11, the automatic faucet 1 is in a water stop state. In order to perform automatic spout water by such a sensor 11, the automatic faucet 1 includes a solenoid valve 12 that opens and closes the water passage 10 to the spout 4, and opens and closes the solenoid valve 12 based on an output signal from the sensor 11. The control part 13 which controls is provided.

  The electromagnetic valve 12 is disposed above the mixing valve 5 at the base 3 a of the faucet body 3. The electromagnetic valve 12 is provided in the middle of the water passage 10 and allows the hot water obtained by the mixing valve 5 to pass therethrough and opens and closes the water passage 10 by operating the valve member 12a. That is, in the automatic water faucet 1, water discharge from the water discharge port 4 is started when the electromagnetic valve 12 is opened, and water discharge from the water discharge port 4 is stopped when the electromagnetic valve 12 is closed. The solenoid valve 12 is electrically connected to the control unit 13 and opens and closes in response to a control signal from the control unit 13.

  The control unit 13 is disposed above the electromagnetic valve 12 in the faucet body 3. The control unit 13 is connected to the sensor 11 and receives a detection signal about the presence / absence of detection of the user, which is an output signal from the sensor 11. And the control part 13 makes the solenoid valve 12 an open state by receiving the signal output from the sensor 11 in the state in which the sensor 11 is detecting the user.

  The automatic faucet 1 also includes a generator 14 that generates power by the action of hot water flowing through the water passage 10. The generator 14 is configured on the upstream side of the water outlet 4 in the water passage 10 in the horizontal portion 3 b of the faucet body 3. The generator 14 is an axial generator that is provided in the middle of the water passage 10 and has a portion that is rotated by the water flow of the hot water flowing through the water passage 10 while allowing the hot water obtained by the mixing valve 5 to pass therethrough.

  The electric power generated by the generator 14 is charged in a capacitor built in the control unit 13. The electrical energy stored in the capacitor is used for driving the sensor 11, the electromagnetic valve 12, the control unit 13, and the like, for example. A backup battery 15 for supplying power to a capacitor built in the control unit 13 is provided above the electromagnetic valve 12 in the faucet body 3. The backup battery 15 supplies power to the capacitor built in the control unit 13 when the automatic faucet 1 is used or when power generation by the generator 14 is not performed for a long period of time.

  In the automatic water faucet 1 of the present embodiment having the above-described configuration, the water stop state is maintained with the electromagnetic valve 12 being closed. In the water stop automatic faucet 1, hot water and water supplied through the hot water supply pipe 6 and the water supply pipe 8 are blocked by the closed electromagnetic valve 12 through the mixing valve 5. When the user of the automatic faucet 1 holds his / her hand under the spout 4 with respect to the automatic faucet 1 in the water stop state, the user's hand is detected by the sensor 11. The control unit 13 receives the output signal from the sensor 11 that has detected the user's hand, and opens the electromagnetic valve 12.

  As a result, the state in which hot water is blocked by the electromagnetic valve 12 in the middle of the water passage 10 is released, and hot water and water supplied through the hot water supply pipe 6 and the water supply pipe 8 are released from the electromagnetic valve 12 in the water passage 10. It flows out and is discharged from the spout 4 through the generator 14. Here, the generator 14 generates power by the flow of hot water passing through the generator 14. And if a user's hand moves to the position which is not detected by the sensor 11, the solenoid valve 12 will be closed by the control part 13 based on the output signal from the sensor 11, and discharge of the hot water from the spout 4 will stop automatically. .

  As described above, the automatic faucet 1 of the present embodiment includes the mixing valve 5, the sensor 11, the electromagnetic valve 12, the control unit 13, and the generator 14, and these are built in the faucet body 3. . And in the automatic water tap 1, the water tap main body 3 has an outer edge part comprised so that decomposition | disassembly is possible with a some cover member.

  The faucet body 3 includes a body portion 21 and a cover portion 22 as an outer edge portion that covers the body portion 21. The main body 21 supports the mixing valve 5 and the electromagnetic valve 12 included in the automatic faucet 1. Specifically, the mixing valve 5 has a substantially cylindrical outer shape as a whole. Therefore, the main body 21 has a substantially cylindrical hole 21a corresponding to the outer shape of the mixing valve 5, and supports the mixing valve 5 in a state where the mixing valve 5 is inserted into the hole 21a. In addition, the substantially cylindrical shape which is the shape of the hole 21a is the cylinder axis direction in the horizontal direction (left-right direction in FIG. 2) substantially orthogonal to the extending direction (left-right direction in FIG. 1) of the projected horizontal portion 3b. .

  The electromagnetic valve 12 has a substantially cylindrical outer shape at a portion that supports a valve member 12 a that constitutes a portion that opens and closes the water passage 10. For this reason, the main body 21 has a substantially cylindrical recess 21b that opens upward corresponding to the outer shape of the solenoid valve 12, and the solenoid valve is fitted with a portion that supports the valve member 12a in the recess 21b. 12 is supported. The main body 21 is accommodated in the base 3 a portion of the faucet main body 3.

  Thus, the main body 21 that supports the mixing valve 5 and the electromagnetic valve 12 forms the water passage 10 so that hot water and water supplied to the faucet main body 3 pass through the mixing valve 5 and the electromagnetic valve 12. As described above, the hot water supply port 7 to which the hot water supply pipe 6 is connected and the water supply port 9 to which the water supply pipe 8 is connected are located below the hole portion 21a that supports the mixing valve 5 in the main body portion 21. It is formed to open.

  Moreover, the generator 14 comprised in the horizontal part 3b of the faucet main body 3 as mentioned above is connected to the part of the water flow path 10 formed in the main body part 21 via the water conduit member 23 (FIG. 1). That is, hot water that flows downstream from the portion of the water passage 10 formed in the main body portion 21 flows into the generator 14 through the water passage pipe member 23.

  The cover part 22 includes a lower cover body 24 and an upper cover body 25. The lower cover body 24 constitutes a portion of the base portion 3 a of the faucet body 3 and a lower portion of the horizontal portion 3 b in the cover portion 22. The upper cover body 25 forms an upper ceiling portion in the cover portion 22. That is, the lower cover body 24 forms a space for housing the main body portion 21 that supports the mixing valve 5 and the electromagnetic valve 12 and opens the upper portion of the cover portion 22 over substantially the entire surface. And the upper cover body 25 comprises a part of cover part 22 as a lid-shaped member so that the opening part of the upper side of the lower cover body 24 may be covered.

  The lower cover body 24 and the upper cover body 25 constituting the cover portion 22 are on the opposite side (the right side in FIG. 1) to the side where the horizontal portion 3b extends in the faucet body 3 in a state where they are assembled together. It is fixed on the back side by a fastening member 26 such as a screw. Therefore, the cover portion 22 is configured to be disassembled into a plurality of parts including the lower cover body 24 and the upper cover body 25 by removing the fastening member 26. That is, in this embodiment, the cover part 22 is an outer edge part comprised so that decomposition | disassembly is possible by the lower cover body 24 and the upper cover body 25 which are several cover members.

  As described above, the lower cover body 24 and the upper cover body 25 constituting the cover portion 22 accommodate the mixing valve 5, the electromagnetic valve 12, the generator 14, the sensor 11, and the control unit 13 built in the faucet body 3. To form a space. In other words, the cover portion 22 constituted by the lower cover body 24 and the upper cover body 25 is formed with a portion of the opening 3 c that exposes the water discharge port 4 to the outside, a hot water supply port 7, and a water supply port 9 in the faucet body 3. A substantially entire portion other than the opening portion for opening the lower end portion side of the main body portion 21 to be opened downward is covered. The lower cover body 24 and the upper cover body 25 are formed using metal, resin, or the like as a material.

  In the present embodiment, the cover portion 22 constituting the faucet body 3 is constituted by the lower cover body 24 and the upper cover body 25 which are two cover members that can be disassembled. You may be comprised by three or more cover members. Further, the shape of the faucet body 3 is not particularly limited, and an appropriate shape is adopted corresponding to various designs. Further, the main body portion 21 constituting the faucet body 3 may be a part formed integrally with the cover portion 22 constituting the faucet body 3.

  Further, in the automatic faucet 1 of the present embodiment, the mixing valve 5 is configured as an assembly unit that can be removed integrally with the faucet body 3 without requiring the cover portion 22 to be disassembled. In other words, the mixing valve 5 is attached to and detached from the faucet body 3 in a state where the lower cover body 24 and the upper cover body 25 are assembled and fixed by the fastening member 26 to integrally form the cover portion 22. Configured to be possible.

  Specifically, the mixing valve 5 is removed from a portion of the faucet body 3 where the handle 20 is provided. That is, as shown in FIG. 3A, when removing the mixing valve 5 from the faucet body 3, the handle 20 is first removed. Similarly, as shown in FIG. 3A, the fixing member 27 for fixing the mixing valve 5 to the faucet body 3 is removed from the state where the handle 20 is removed. The fixing member 27 has a substantially cylindrical outer shape. The fixing member 27 has a hole portion 27a into which a portion connected to the handle 20 of the mixing valve 5 is inserted by the inner peripheral surface, and has a screw portion 27b on the outer peripheral surface.

  The fixing member 27 allows a part of the mixing valve 5 to be connected to the handle 20 through the opening 3d of the mixing valve 5 inserted and supported in the hole 21a of the main body 21. And fixed to the main body portion 21 by the screw portion 27b. For this reason, an inner peripheral screw portion 21 c that engages with the screw portion 27 b of the fixing member 27 is formed at the opening end portion of the hole portion 21 a of the main body portion 21 on the opening portion 3 d side.

  Then, as shown in FIG. 3B, the mixing valve 5 is pulled out from the hole 21 a of the main body 21 in a state where the handle 20 and the fixing member 27 are removed, and is integrally removed. That is, the mixing valve 5 having a substantially cylindrical outer shape is pulled out in the cylinder axis direction, and is extracted as an integrated assembly unit 50 from the hole 21 a of the main body 21.

  On the other hand, when the mixing valve 5 is attached to the faucet body 3, the mixing valve 5 as the assembly unit 50 is inserted into and supported by the hole 21a by being inserted into the hole 21a of the main body 21. The fixing member 27 is screwed and fixed to the main body 21. The handle 20 is connected to and fixed to the mixing valve 5 via a fixing member 27 between the handle 20 and the mixing valve 5.

  Thus, in the configuration in which the mixing valve 5 can be integrally removed from the faucet body 3 without requiring the cover portion 22 to be disassembled, the amount of hot water discharged from the water outlet 4 is fixed to the mixing valve 5. A constant flow valve 30 is provided for limiting the amount. That is, the constant flow valve 30 is incorporated in the mixing valve 5 configured as an integral assembly unit 50.

  In the present embodiment, the constant flow valve 30 is incorporated at the end of the mixing valve 5 opposite to the side to which the handle 20 is connected. At the end of the mixing valve 5 opposite to the side to which the handle 20 is connected, an outlet 5a through which hot water from the mixing valve 5 in the water passage 10 flows is formed. That is, hot water obtained by mixing hot water and water in the mixing valve 5 flows out from the outlet 5 a while being limited to a predetermined flow rate by the constant flow valve 30.

  According to the automatic faucet 1 of the present embodiment as described above, a generator 14 that generates power by receiving the action of water flowing through a water passage 10 formed by the faucet body 3 inside the faucet body 3; In the configuration including the constant flow valve 30 for limiting the amount of water discharged from the water discharge port 4 to a certain amount, the constant flow valve 30 can be easily detached from the faucet body 3.

  That is, in the automatic faucet 1, the constant flow valve 30 is incorporated in the mixing valve 5 configured as an assembly unit 50 that can be attached to and detached from the faucet body 3 as described above. For this reason, the constant flow valve 30 can be removed from the mixing valve 5 removed from the faucet body 3. That is, in order to remove the constant flow valve 30 from the faucet body 3, it is only necessary to remove the mixing valve 5 from the faucet body 3 and remove the constant flow valve 30 from the removed mixing valve 5.

  Therefore, the constant flow valve 30 can be removed from the faucet body 3 without disassembling the cover portion 22 composed of the lower cover body 24 and the upper cover body 25. This eliminates the problem of troublesome work for removing the constant flow valve 30 from the faucet body 3 due to the relationship with other components built into the faucet body 3 such as the electromagnetic valve 12. The valve 30 can be easily removed from the faucet body 3. As a result, the removal work of the constant flow valve 30 required depending on the situation of the installation site of the automatic faucet 1 and the maintenance work of the constant flow valve 30 accompanied by the removal of the constant flow valve 30 are facilitated.

  Moreover, in the automatic water tap 1 of this embodiment, the solenoid valve 12 is a diaphragm type solenoid valve. The mixing valve 5 is provided upstream of the electromagnetic valve 12 in the water passage 10.

  That is, the solenoid valve 12 has a valve member 12a that is movably provided so as to open and close the water passage 10 according to a pressure difference between the upstream side (primary side) and the downstream side (secondary side) in the water passage 10. The valve member 12a is movably supported by a diaphragm formed of a stretchable / flexible material such as rubber.

  In the present embodiment, as described above, in the electromagnetic valve 12 supported by the concave portion 21b formed in the main body portion 21 constituting the faucet main body 3, the valve member 12a is formed on the primary side and the secondary side by the diaphragm. It is supported to move up and down according to the difference in water pressure. In addition, since the thing of a well-known structure can be used as the diaphragm type solenoid valve 12, detailed description about the solenoid valve 12 is abbreviate | omitted.

  Thus, by providing the mixing valve 5 on the upstream side of the diaphragm type electromagnetic valve 12, the constant flow valve 30 incorporated in the mixing valve 5 is positioned on the upstream side of the electromagnetic valve 12. If the constant flow valve 30 is positioned on the downstream side of the diaphragm type electromagnetic valve 12, the pressure difference between the upstream side and the downstream side of the electromagnetic valve 12 may be reduced due to the pressure loss caused by the constant flow valve 30. In such a case, a sufficient pressure difference for good opening / closing operation of the diaphragm type solenoid valve 12 is not obtained between the upstream side and the downstream side of the solenoid valve 12, and the solenoid valve 12 is difficult to open / close. The problem of becoming may occur. Such a problem is likely to occur, for example, when the solenoid valve 12 is continuously opened and closed.

  Therefore, by providing the constant flow valve 30 upstream of the solenoid valve 12, a sufficient pressure difference is obtained between the upstream side and the downstream side of the solenoid valve 12 due to the flow of hot water previously limited by the constant flow valve 30. It is done. Thereby, the performance of the diaphragm type electromagnetic valve 12 can be ensured without being affected by the pressure loss due to the constant flow valve 30.

  Further, in the automatic faucet 1 of the present embodiment, the mixing valve 5 is provided with a strainer 31 that allows hot water led to the constant flow valve 30 to pass therethrough. Accordingly, the strainer 31 disposed on the upstream side of the electromagnetic valve 12 in the water passage 10 in order to ensure the operation of the electromagnetic valve 12 can be easily removed from the faucet body 3.

  That is, the mixing valve 5 is configured as an assembly unit 50 that can be attached to and detached from the faucet body 3 as described above. For this reason, by providing the strainer 31 inside the mixing valve 5, the strainer 31 can be easily taken out from the faucet body 3 together with the mixing valve 5. Thereby, the maintenance of the strainer 31 can be easily performed.

  Below, the structure of the mixing valve 5 is demonstrated concretely using FIG. 4 and FIG. As shown in FIGS. 4 and 5, the mixing valve 5 includes a spindle 41 as a valve body, a strainer 31 mounted inside the spindle 41, and a support member 43 that supports the strainer 31 with respect to the spindle 41. The constant flow valve 30 and the nut member 44 are provided.

  The spindle 41 is a member configured in a substantially cylindrical shape as a whole, and is provided so as to perform an operation corresponding to an operation for adjusting the temperature of the hot water. In the present embodiment, the spindle 41 is rotated by the rotation operation of the handle 20 as an operation for adjusting the temperature of the hot water. The handle 20 has a substantially cylindrical outer shape, and is attached to the spindle 41 so that the direction of the cylinder axis is the direction of the rotation axis.

  The spindle 41 has a reduced diameter portion 41a on one end side in the cylinder axis direction. The reduced diameter portion 41 a is a portion that protrudes outside the faucet body 3 through the opening 3 d of the cover portion 22 in a state where the mixing valve 5 is mounted on the faucet body 3. The handle 20 is attached to the reduced diameter portion 41 a of the spindle 41.

  The handle 20 is fixed to the reduced diameter portion 41 a of the spindle 41 by using at least one of a screw screwed along the cylinder axis direction of the spindle 41 and a screw screwed along the radial direction of the spindle 41. The That is, as shown in FIG. 4, when the handle 20 is fixed to the spindle 41 with a screw screwed along the cylinder axis direction of the spindle 41, the reduced diameter portion 41a is formed along the axial direction in the reduced diameter portion 41a. A screw hole 41b that opens to the tip surface of 41a is used. That is, in this case, a screw for fixing the handle 20 to the spindle 41 passes through the handle 20 along the cylinder axis direction of the spindle 41 and is screwed into the screw hole 41b.

  Further, as shown in FIG. 4, when the handle 20 is fixed to the spindle 41 by screws screwed along the radial direction of the spindle 41, screw holes formed so as to penetrate the handle 20 along the radial direction. 20a is used. That is, in this case, a screw for fixing the handle 20 to the spindle 41 passes through the handle 20 along the radial direction of the spindle 41 and is screwed in the radial direction with respect to the reduced diameter portion 41a.

  The spindle 41 to which the handle 20 is fixed in this way rotates integrally with the handle 20 that is rotated. That is, the spindle 41 is provided so as to perform a rotation operation in which the cylinder axis direction is the rotation axis direction as an operation corresponding to the rotation operation of the handle 20. In the following description, with respect to the cylinder axis direction of the spindle 41 (left and right direction in FIG. 4), the side to which the handle 20 is attached (right side in FIG. 4) will be referred to as the “handle side” in the mixing valve 5. The side where the outlet 5a is formed (the left side in the figure) is referred to as the “outlet side”.

  The spindle 41 forms a mixing space 5b in which hot water and water flowing into the mixing valve 5 from each of the hot water supply pipe 6 and the water supply pipe 8 are joined. In the present embodiment, the mixing space 5b is formed by a substantially cylindrical internal space 41c that opens to the outlet side in the spindle 41. Accordingly, a hot water hole 45 communicating with the hot water supply port 7 and a water hole 46 communicating with the water supply port 9 are formed in the peripheral wall portion forming the mixing space 5 b in the spindle 41. That is, the hot water from the hot water supply pipe 6 connected to the hot water supply port 7 and constituting the hot water supply path flows into the mixing space 5b through the hot water hole 45, and is connected to the water supply port 9 to connect the water supply path. The water from the water supply pipe 8 which comprises comprises flows into the mixing space 5b through the water hole 46. Hot water in the mixing space 5b flows out from the outlet 5a and is guided to the solenoid valve 12 side.

  Thus, in the mixing valve 5 according to the present embodiment, the hot water hole 45 of the spindle 41 functions as a first opening that allows the hot water supply path to communicate with the mixing space 5b. The water hole 46 that 41 has functions as a second opening that allows the water supply path to communicate with the mixing space 5b. The spindle 41 is connected to the hot water supply path of the mixing space 5b via the hot water hole 45 by the rotating operation associated with the rotation operation of the handle 20, and the water supply path of the mixing space 5b via the water hole 46. The mixing ratio of hot water and water is adjusted by changing the communication area.

  In other words, the rotation of the spindle 41 changes the hot water supply path formed in the main body 21 and the communication area of the mixing space 5b with respect to each of the water supply paths (opening area of the communicating part). In other words, the rotation of the spindle 41 changes the opening area of the hot water hole 45 with respect to the hot water supply path and the opening area of the water hole 46 with respect to the water supply path. In this way, the communication area of the mixing space 5b through each of the hot water hole 45 and the water hole 46 changes, so that hot water that flows into the mixing space 5b through the hot water hole 45 and the water hole 46, respectively. Alternatively, the amount of water changes, and the mixing ratio of hot water and water in the mixing space 5b changes. Therefore, the mixing ratio of hot water and water in the mixing valve 5 is adjusted by adjusting the rotation amount of the spindle 41 by the handle 20.

  In the present embodiment, the spindle 41 is rotatably supported with respect to the hole 21 a of the main body 21 via the spindle case 47. The spindle case 47 is a substantially cylindrical member that opens on both sides in the cylinder axis direction, and is attached to the spindle 41 by inserting the spindle 41 from one side (outlet side) opening.

  Specifically, the spindle case 47 has an inner peripheral surface shape corresponding to the outer shape of the spindle 41. The spindle case 47 is attached to the spindle 41 by the spindle 41 being inserted into the spindle case 47 from one side (outlet side) opening from the reduced diameter portion 41a side. In the spindle 41, an O-ring 41 r is formed on the outer peripheral surface of the spindle 41 for sealing between the inner peripheral surface of the spindle case 47 and the outer peripheral surface of the spindle 41 to prevent water leakage to the handle 20 side. The outer circumferential groove is fitted. In a state where the spindle case 47 is mounted on the spindle 41, the reduced diameter portion 41a of the spindle 41 protrudes from the opening on the other side (handle side) of the spindle case 47, and the hot water hole 45 and the water A portion including the peripheral wall portion in which the hole 46 is formed is covered from the outside by the spindle case 47.

  Accordingly, the spindle case 47 is formed with a hot water communication hole 47a and a water communication hole 47b that allow the hot water hole 45 and the water hole 46 of the spindle 41 to communicate with the hot water supply port 7 and the water supply port 9, respectively. The The hot water communication hole 47 a communicates with the hot water supply port 7 through a hot water passage 21 d formed in the main body portion 21, and the water communication hole 47 b also passes through the water passage 21 e formed in the main body portion 21. It communicates with the water inlet 9.

  The spindle case 47 is supported so as not to rotate with respect to the main body 21 in a state where the spindle case 47 is inserted into the hole 21 a of the main body 21. That is, the spindle case 47 is positioned with respect to the main body portion 21 in the rotation direction in which the cylindrical axis direction is the rotation axis direction. The spindle case 47 has a positioning convex portion 47c which is a protruding portion formed on the outer peripheral surface portion for positioning in the rotation direction with respect to the main body portion 21. On the other hand, a positioning recess 21 f that is a notch corresponding to the positioning protrusion 47 c of the spindle case 47 is formed in the hole 21 a of the main body 21. The spindle case 47 is supported so as not to rotate with respect to the main body portion 21 by fitting the positioning convex portion 47c into the positioning concave portion 21f. In the spindle case 47, an O-ring 47 r for sealing between the hole portion 21 a and the spindle case 47 to prevent water leakage to the handle 20 side is formed in an outer peripheral groove formed on the outer peripheral surface of the spindle case 47. It is fitted.

  Thus, the spindle 41 can be rotated with respect to the main body 21 via the spindle case 47 by being inserted so as to be relatively rotatable with respect to the spindle case 47 that is supported so as not to rotate with respect to the main body 21. Supported by The rotation of the spindle 41 changes the communication area of the hot water hole 45 and the water hole 46 with respect to the hot water communication hole 47a and the water communication hole 47b, that is, the area where the opening positions overlap each other. The mixing ratio of hot water and water flowing into the mixing space 5b changes.

  The ratio of hot water flowing into the outlet 5a increases as the spindle 41 rotates in one direction, and the ratio of water flowing into the outlet 5a increases as the spindle 41 rotates in the other direction. The correspondence relationship between the rotation of the spindle 41 (rotation direction / rotation amount) and the mixing ratio of hot water and water includes the hot water hole 45, the water hole 46, and the hot water communication hole communicating with each of them. It is set according to the shape, opening area, etc. of 47a and the water communication hole 47b.

  The rotation range of the spindle 41 that rotates with respect to the main body 21 is limited by the rotation range of the handle 20 attached to the spindle 41 with respect to the main body 21. The rotation range of the handle 20 relative to the main body 21 is limited via the spindle case 47 that is supported so as not to rotate relative to the main body 21 as described above.

  Specifically, the spindle case 47 has an arcuate protrusion 47 d along the circumferential direction of the spindle case 47 on the end surface portion on the handle side. The protrusion 47d acts on the handle 20 attached to the spindle 41, so that the rotation range of the handle 20 is limited. That is, the handle 20 is provided with a shape portion that regulates the rotation of the handle 20 by contacting the protrusion 47d at a predetermined position in each of the one rotation direction and the other rotation direction. A slip washer 48 interposed between the spindle 41 and the spindle case 47 is attached to the reduced diameter portion 41 a of the spindle 41.

  The strainer 31 is for passing hot water led to the constant flow valve 30 and has a cylindrical shape along the inner peripheral surface of the spindle 41 forming the mixing space 5b. The strainer 31 includes a frame portion 31a along the cylindrical outer shape, and a transmission portion 31b that is a portion that is formed as a net-like or porous portion in the cylindrical outer shape and transmits hot water. The strainer 31 is supported by the support member 43 in a state where the strainer 31 is inserted from the opening side into the internal space 41 c opening to the outlet side in the spindle 41.

  The support member 43 supports the strainer 31 with respect to the spindle 41. The support member 43 supports the strainer 31 inserted into the internal space 41 c of the spindle 41 while being sandwiched between the support member 43 and the spindle 41. The support member 43 is a substantially cylindrical member, and has a flange portion 43a that is a diameter-expanded portion at one end portion (an end portion on the outflow side) in the cylinder axis direction. The support member 43 is inserted into the internal space 41c of the spindle 41 from the side opposite to the side on which the flange portion 43a is formed, and the portion of the flange portion 43a is engaged by the step portion 41d formed in the internal space 41c. By being stopped, it is positioned with respect to the spindle 41 in the cylinder axis direction.

  The support member 43 supports the strainer 31 between the support member 43 and the spindle 41 in a state where the end of the strainer 31 on the outlet side is inserted. For this reason, the support member 43 has a support hole 43 b into which one end of the strainer 31 is inserted. Thus, the strainer 31 is mounted in the mixing valve 5 in a state where it is inserted into the internal space 41c of the spindle 41 from one end side in the cylinder axis direction and supported by the support member 43 from the other end side in the cylinder axis direction. .

  The strainer 31 mounted in the mixing valve 5 is supported in a manner along the inner peripheral surface of the spindle 41 that secures the mixing space 5b and forms the mixing space 5b. Therefore, the mixing space 5 b is substantially formed as an internal space of the strainer 31.

  Further, in the strainer 31, a plurality of engaging protrusions 31c are formed in the frame portion 31a. In the present embodiment, a total of six engaging protrusions 31c are provided at three locations at substantially equal intervals in the circumferential direction at both ends of the strainer 31 in the cylinder axis direction. The strainer 31 is engaged with the inner peripheral surface forming the internal space 41c of the spindle 41 by the engagement protrusion 31c on one end side (handle side) in the cylinder axis direction, so that the rotation direction is relative to the spindle 41. Is positioned. Similarly, the strainer 31 is rotated by engaging the engagement protrusion 31c on the other end side (outlet side) in the cylinder axis direction with the inner peripheral surface forming the support hole 43b of the support member 43. It is positioned with respect to the support member 43 in the direction. As a result, the spindle 41 and the support member 43 are in a relative non-rotatable relationship via the strainer 31 that is positioned in the rotational direction with respect to each.

  The support member 43, which is a substantially cylindrical member, forms a hole 43 c that secures the water passage 10 by its inner peripheral surface. The hole 43 c includes a support hole 43 b that supports one end of the strainer 31, and opens to both ends of the support member 43 in the cylinder axis direction. And the support member 43 allows the hot water which passed through the strainer 31 (the permeation | transmission part 31b) to pass through the hole 43c. That is, the support member 43 allows the hot water that has passed through the strainer 31 obtained in the mixing space 5b to pass through the hole 43c to the outlet side while the strainer 31 is supported between the support member 43 and the spindle 41. .

  The constant flow valve 30 is located on the outlet side with respect to the support member 43. The constant flow valve 30 has a substantially disk-like outer shape as a whole, and is incorporated in the mixing valve 5 in a posture in which the central axis direction (the left-right direction in FIG. 4) substantially coincides with the cylinder axis direction of the spindle 41 and the like. .

  The constant flow valve 30 includes an O-ring 30a and an upstream valve member 30b and a downstream valve member 30c that sandwich the O-ring 30a from both sides in the central axis direction (left-right direction in FIG. 4). In the constant flow valve 30, when the upstream valve member 30b receives the pressure of hot water passing through the hole 43c of the support member 43, the O-ring 30a is crushed by the upstream valve member 30b and the downstream valve member 30c. . Thereby, the flow path formed between the upstream valve member 30b and the downstream valve member 30c is narrowed, and the flow rate of the hot water passing through the constant flow valve 30 is limited to a certain amount.

  The nut member 44 is a substantially cylindrical member, and is fixed by being screwed into the opening end portion of the internal space 41 c with respect to the spindle 41. For this reason, the nut member 44 has a screw portion 44 a for fixing to the spindle 41. The screw portion 44 a is formed on the outer peripheral surface of the nut member 44. In this embodiment, a diameter-expanded portion 41e is formed at the end on the outlet side of the spindle 41, and the nut member 44 is formed on the inner peripheral surface of the diameter-expanded portion 41e that forms the open end of the internal space 41c. A screw portion 41f corresponding to the screw portion 44a is formed. That is, the nut member 44 is fixed to the enlarged diameter portion 41 e by engaging the screw portion 44 a with the screw portion 41 f of the spindle 41.

  The nut member 44 has a flange portion 44b that is a diameter-expanded portion at one end portion (the end portion on the outlet side) in the cylinder axis direction. The nut member 44 is in contact with the end surface of the spindle 41 on the opening side (outlet side) while being fixed to the spindle 41.

  Further, the nut member 44 forms an opening 44 c that secures the water passage 10 on the downstream side of the water passage 10 of the support member 43 while being fixed to the spindle 41. That is, the substantially cylindrical nut member 44 forms an opening 44c that secures the water passage 10 by its inner peripheral surface. The opening 44c formed in the nut member 44 accommodates the constant flow valve 30 in a state where the nut member 44 is fixed to the spindle 41, and forms an outlet 5a of the mixing valve 5.

  Thus, in this embodiment, the outlet 5a of the mixing valve 5 is formed by the nut member 44 fixed to the spindle 41. Accordingly, the hot water that has passed through the strainer 31 obtained in the mixing space 5b flows out from the outlet 5a formed by the opening 43c of the nut member 44 through the hole 43c of the support member 43 and the constant flow valve 30. .

  As described above, in the mixing valve 5 having the spindle 41, the strainer 31, the support member 43, the constant flow valve 30, and the nut member 44, the strainer 31, the support member 43, and the constant flow valve 30 are connected to the spindle 41 and this. The nut member 44 fixed to the spindle 41 is supported in a sandwiched state.

  That is, for the spindle 41, the strainer 31 is inserted into the internal space 41c. The strainer 31 inserted into the internal space 41 c is sandwiched between the spindle 41 by the support member 43 and is positioned and supported. The support member 43 that supports the strainer 31 between the spindle 41 and the spindle 41 is fitted into the spindle 41 using a step on the inner peripheral surface that forms the internal space 41c. The constant flow valve 30 is positioned by being sandwiched between the support member 43 and the nut member 44 screwed into the spindle 41 in a state where the constant flow valve 30 is disposed on the outlet side of the support member 43.

  Therefore, the strainer 31, the support member 43, and the constant flow valve 30 are sequentially fitted (inserted) into the internal space 41c from the opening side of the internal space 41c of the spindle 41, and the nut member 44 is opened in the internal space 41c. By being screwed into the end portion, it is supported while being sandwiched between the spindle 41 and the nut member 44.

  As a result, the spindle 41 and the nut member 44 fixed to the spindle 41, and the strainer 31, the support member 43, and the constant flow valve 30 accommodated in the spindle 41 by being sandwiched between them are integrated. An assembly is configured. Then, by attaching the spindle case 47 to the assembly, an assembly unit 50 (see FIG. 3B) that can be removed integrally with the faucet body 3 is formed as described above. . That is, the assembly valve 50 is inserted into the hole 21 a of the main body 21 constituting the faucet body 3, fixed by the fixing member 27, and attached to the handle 20, so that the mixing valve 5 included in the automatic faucet 1 is provided. Composed.

  In the mixing valve 5 configured as described above, as the handle 20 rotates, the assembly including the spindle 41, that is, the spindle 41 and the nut member 44 are used to connect the strainer 31, the support member 43, and the constant flow valve 30. The sandwiching configuration rotates integrally with the spindle case 47 positioned on the main body 21. The rotation of the assembly including the spindle 41 changes the communication area of the mixing space 5b with respect to the hot water supply path via the hot water hole 45 and the communication area with respect to the water supply path via the water hole 46, The mixing ratio of hot water and water in the mixing valve 5 is adjusted. And the hot water obtained in the mixing space 5b flows out from the outflow port 5a through the hole 43c of the support member 43 and the constant flow valve 30, and is guided to the electromagnetic valve 12 side.

  According to the mixing valve 5 of the present embodiment configured as described above, the constant flow valve 30 and the strainer 31 are merely held inside the spindle 41 by the nut member 44. Easy to remove. That is, the constant flow valve 30 and the strainer 31 are supported by being sandwiched by the nut member 44 fixed to the spindle 41 inside the spindle 41 without being fastened by a screw portion or the like.

  For this reason, in the assembly unit 50 to be removed from the faucet body 3, the constant flow valve 30 and the strainer 31 can be easily removed simply by removing the nut member 44 from the spindle 41. Thereby, the maintenance of the constant flow valve 30 and the strainer 31 can be easily performed.

  The nut member 44 to be screwed into the spindle 41 has a slit portion 44d for tightening the spindle 41 with the screw portion 44a. The slit portion 44d is formed on an end surface portion of the nut member 44, which is a substantially cylindrical member, on the side where the outlet 5a is formed while being fixed to the spindle 41.

  The slit portion 44 d is formed as a groove-shaped portion along the radial direction of the nut member 44 at the end surface portion on the outlet side of the nut member 44. Therefore, the slit portion 44 d is formed as a pair of cutout portions facing each other in the radial direction of the nut member 44 at the end surface portion that opens in a cylindrical shape in the nut member 44. In the present embodiment, the slit portion 44d has a bottom surface 44e of the slit portion 44d extending from the radially outer side to the inner side of the nut member 44 so that the groove depth increases toward the axial center position of the nut member 44 (axial center position). The slope is down. (See FIG. 4). Thus, the slit portion 44 d formed on the nut member 44 is a shape portion on which a tool such as a flat-blade screwdriver acts to rotate the nut member 44.

  Thus, by forming the slit portion 44d in the nut member 44, for example, by using a tool such as a flathead screwdriver, the attaching / detaching operation of the nut member 44 with respect to the spindle 41 can be easily performed. As a result, it is possible to easily attach and detach the constant flow valve 30 and the strainer 31 that require the nut member 44 to be removed from the spindle 41 in order to take out the spindle 41 as described above. As a result, the maintenance work of the constant flow valve 30 and the strainer 31 can be simplified.

  However, the shape portion for causing the tool or the like to act on the nut member 44 is not limited to the slit portion 44d. Therefore, the shape portion for causing the tool or the like to act on the nut member 44 may be, for example, a double-chamfer shape for sandwiching the nut member 44 from the outer peripheral side with a tool such as a wrench.

1 Automatic faucet 3 Faucet body 4 Water outlet 5 Mixing valve (temperature control unit)
5b Mixed space 6 Hot water supply pipe 8 Water supply pipe 10 Water passage 11 Sensor 12 Solenoid valve 12a Valve member 13 Control part 14 Generator 22 Cover part (outer edge part)
24 Lower cover body (cover member)
25 Upper cover body (cover member)
30 Constant flow valve 31 Strainer 41 Spindle (valve)
43 support member 43c hole 44 nut member 44a screw 44c opening 44d slot 45 hot water hole (first opening)
46 Water hole (second opening)
50 assembly units

Claims (5)

For adjusting the temperature of the hot water discharged from the water outlet by adjusting the mixing ratio of hot water and water supplied to the water faucet body via a predetermined path and the water faucet body constituting the water outlet A temperature control unit, an electromagnetic valve that opens and closes a water passage formed inside the faucet body, a generator that generates electricity by the action of hot water flowing through the water passage, a sensor for detecting a user, A control unit that controls the opening and closing of the solenoid valve based on an output signal from the sensor, the temperature control unit, the solenoid valve, and the sensor are automatic faucets built in the faucet body,
The faucet body has an outer edge configured to be disassembled by a plurality of cover members,
The temperature control part is configured as an assembly unit that can be removed integrally with the faucet body without requiring disassembly of the outer edge part,
An automatic water faucet, wherein a constant flow valve for limiting a discharge amount of hot water from the water discharge port to a constant amount is provided in the temperature control unit. The solenoid valve is a diaphragm type solenoid valve having a valve member movably provided so as to open and close the water passage according to the pressure difference between the upstream side and the downstream side in the water passage.
The automatic water faucet according to claim 1, wherein the temperature control unit is provided on the upstream side of the water passage with respect to the electromagnetic valve.   The automatic water faucet according to claim 1 or 2, wherein a strainer that allows hot water led to the constant flow valve to pass therethrough is provided in the temperature control unit. The temperature control unit is
It is provided so as to perform an operation according to an operation for adjusting the temperature of the hot water, and forms a mixing space for joining the hot water and water, and allows the hot water supply path to communicate with the mixing space. A second opening that allows the first opening and the water supply path to communicate with the mixing space, and communication with the hot water supply path of the mixing space through the first opening by the operation. A valve body for adjusting a mixing ratio of the hot water and water by changing an area and a communication area of the mixing space with respect to the water supply path via the second opening;
A support member that supports the strainer with respect to the valve body and forms a hole portion that secures the water passage, and allows hot water that has passed through the strainer to pass through the hole portion;
A nut member having a screw part for being fixed to the valve body, and forming an opening for securing the water passage on the downstream side of the support member in a state of being fixed to the valve body. ,
The said strainer, the said supporting member, and the said constant flow valve are supported in the state pinched | interposed by the said valve body and the said nut member fixed to this valve body, The any one of Claims 1-3 characterized by the above-mentioned. An automatic faucet according to claim 1.   The automatic water faucet according to claim 4, wherein the nut member has a slit portion for tightening the valve body with the screw portion.

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