JP5155902B2 - Mixing valve device - Google Patents

Description

  The present invention relates to a mixing valve device that mixes water and hot water while appropriately adjusting the mixing ratio so that the water can be taken out as mixed water at a predetermined temperature.

  Of the mixing valves that receive the supply of water and hot water, adjust the ratio of the water and hot water to make a mixed state, and send it out as mixed water of a predetermined temperature, the rotary type is a substantially cylinder disposed in the housing The valve body is rotated manually or automatically to adjust and control the mixing ratio of hot and cold water to obtain mixed water at the temperature desired by the user. Some are disclosed in Japanese Unexamined Patent Publication No. 2008-57666.

JP 2008-57666 A

  The conventional mixing valve has a configuration shown in the above-mentioned patent document, and is a mechanism that can appropriately adjust the mixed water to a desired temperature, but when the water supply is shared with other water-using devices such as waterworks, As the water is used in other equipment, the amount of water supplied may suddenly drop or stop supplying. In such a situation, almost only hot water is supplied to the inside of the mixing valve. When adjustment is performed by automatically moving the valve body, such as an electric motor, the valve body is forcibly detected after the mixed water temperature detector detects an abnormally high temperature. To reduce the amount of inflow of hot water or to stop sending mixed water with a separate control valve, so it is completely impossible for hot water to flow downstream from the mixing valve. There was a problem that it was impossible to stop and there was a danger of people coming into contact with such hot water.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a mixing valve device that can ensure safety without causing only hot water to accidentally flow out even when water supply to the valve is delayed. And

  The mixing valve device according to the present invention includes a housing in which water and hot water inflow ports leading from the outside to an internal space are formed, and a plurality of holes formed in a peripheral side surface in the space of the housing. A substantially cylindrical and hollow valve body that is rotatably arranged, and the valve body communicates with each inlet and each hole with respect to each inlet of water and hot water in the housing. In the mixing valve device, the rotation angle is adjusted so as to change, and the mixed water at a predetermined temperature obtained by adjusting the ratio of the amount of water and hot water supplied to the hollow part of the valve body can be sent out of the housing. The valve body is movable within a predetermined range to a position where the valve body is displaced at least in the longitudinal direction of the valve body with respect to the hot water inlet, and the valve body and the housing are brought into contact with both ends, respectively. From the position where the hole communicates with the hot water inlet A valve body moving spring disposed in an arrangement that presses and urges the valve body in the longitudinal direction toward a position where the valve body is not allowed to pass; A pressure receiving portion that is received in a direction opposite to the urging direction of the body moving spring, and a water introduction path that guides water from the water inflow port to the pressure receiving portion in the housing so that water pressure can be applied to the pressure receiving portion. In a state in which water is supplied to the water inlet and the pressure receiving portion receives water pressure, the valve body is held at a longitudinal position where the holes can communicate with the inlets, while the water inlet In a state where water is not supplied, the valve body moves to a position where at least the hole does not communicate with the hot water inlet in accordance with the biasing force of the valve body moving spring.

  As described above, according to the present invention, in a state where the water and hot water constituting the mixed water are normally supplied, the valve body allows the water hole and the water inlet of the housing to communicate with each other due to the water pressure of the water. The ratio of water and hot water inflow can be adjusted by rotating the valve body. On the other hand, if there is a problem with the water supply, the valve body will move to the valve body movement spring because sufficient water pressure is not applied to the pressure receiving part. In the abnormal state where water does not reach the inflow port by moving in the longitudinal direction with the energization of the valve and the valve body closes at least the inflow port of hot water, the pressure receiving part at the end does not receive an appropriate water pressure The valve body is immediately moved by the urging force of the valve body moving spring, and the valve body quickly closes the hot water inlet. Inflow of water is suppressed, and hot water is accidentally discharged downstream A situation can be prevented, it is possible to ensure the safety.

  In addition, the mixing valve device according to the present invention is provided in the escape passage, the escape passage connecting the outlet of the mixed water in the housing and the water introduction passage, and the escape flow as necessary. A relief valve body that opens and closes the passage, and is disposed closer to the outlet than the relief valve body in the relief flow path, and is arranged to urge the relief valve body in the relief flow path opening direction, and the ambient temperature is A temperature-sensitive spring made of a shape memory material that is deformed so as to move the relief valve body to the escape passage opening position when the temperature becomes higher than the normal use temperature range of the mixed water, and the relief valve body in the relief passage closing direction. The escape valve body is arranged to be energized and is held in a state in which the escape valve body is closed in the normal use temperature range of the mixed water, while the escape passage of the relief valve body accompanying the deformation is in a high-temperature deformation state of the temperature-sensitive spring. A relief valve body holding spring that allows movement to the open position It is.

  As described above, according to the present invention, the relief passage that communicates with the water introduction passage and the outlet and the relief valve body that opens and closes the relief passage are provided, and the relief water is released by the biasing force of the relief valve body holding spring in the normal use temperature range of the mixed water. When the valve body closes the escape passage, while the mixed water reaches an abnormally high temperature, the temperature-sensitive spring made of shape memory material placed in the escape passage comes into contact with the hot mixed water that has reached from the outlet. Deformation, moving the relief valve body to the release passage opening position, and the water pressure in the water introduction passage is released to the outlet side through the opened release passage, so that the mixed water becomes hot even if water is supplied normally. In an abnormal condition, the valve body with reduced water pressure received by the pressure receiving part can move and the hot water inlet can be closed quickly. The sex can be further enhanced.

  Further, the mixing valve device according to the present invention includes a temperature sensor that detects the temperature of the mixed water as necessary, and a part of the water introduction path when the temperature sensor detects an abnormal temperature state of the mixed water. And a control valve part for releasing the water pressure applied to the pressure receiving part to the outside.

  As described above, according to the present invention, when the temperature sensor detects an abnormal temperature state of the mixed water, the control valve part opens the water introduction path partially, and the pressure receiving part releases the water pressure of the introduction path. By moving the valve body in a state where it is not possible to receive sufficient water pressure to hold the valve body position against the biasing force of the moving spring, the mixed water becomes hot even if water is supplied normally. In an abnormal state, the hot water inlet can be quickly closed, the situation where the mixed water leaves the normal temperature state and becomes high temperature is detected, the hot water flow is suppressed, and the hot hot water flows downstream Can be prevented appropriately and safety can be improved.

It is a schematic block diagram of the mixing valve apparatus which concerns on the 1st Embodiment of this invention. It is a bottom view of the mixing valve apparatus which concerns on the 1st Embodiment of this invention. It is AA schematic sectional drawing of FIG. It is BB sectional drawing of FIG. It is a communication state explanatory view of each inflow mouth and outflow mouth at the time of mixing and sending out of water and hot water of the mixing valve device concerning a 1st embodiment of the present invention. It is a communication state explanatory view of each inflow mouth and outflow mouth at the time of hot water inflow mouth full open of the mixing valve device concerning a 1st embodiment of the present invention. It is a communication state explanatory view of each inflow mouth and outflow mouth at the time of sending out only water of the mixing valve device concerning a 1st embodiment of the present invention. It is valve body movement state explanatory drawing at the time of the water non-supply in the mixing valve apparatus which concerns on the 1st Embodiment of this invention. It is valve body movement state explanatory drawing at the time of the mixed water abnormal high temperature in the mixing valve apparatus which concerns on the 1st Embodiment of this invention. It is a relief valve body movement state explanatory view at the time of mixed water abnormal high temperature in the mixing valve device concerning a 1st embodiment of the present invention. It is valve body position explanatory drawing at the time of mixed water normal temperature in the mixing valve apparatus which concerns on the 2nd Embodiment of this invention. It is valve body position explanatory drawing at the time of the mixed water abnormal high temperature in the mixing valve apparatus which concerns on the 2nd Embodiment of this invention.

(First embodiment of the present invention)
Hereinafter, a mixing valve device according to a first embodiment of the present invention will be described with reference to FIGS.
In each of the drawings, the mixing valve device 1 according to the present embodiment includes a housing 10 in which a substantially circular hole is formed, and a rotation and longitudinal movement of the housing 10. A substantially cylindrical valve body 20 provided, a valve body moving spring 30 that presses and biases the valve body 20 in one direction in the longitudinal direction of the valve body in the housing 10, and a valve body 20 provided at the end of the valve body 20 A pressure receiving portion 26 that receives water pressure from the generated water, a water introduction path 15 that allows water to be introduced from the water inlet 12 to the pressure receiving portion 26 in the housing 10, and allows the water pressure to be applied to the pressure receiving portion 26. The relief flow path 16 that connects the mixed water outlet 14 and the water introduction path 15, the relief valve body 40 that is disposed in the relief flow path 16 to open and close the relief flow path 16, and the relief flow path 16. A temperature sensitive spring 41 for urging the relief valve body 40 in the direction of opening the relief flow passage 16; A relief valve body holding spring 42 for urging the relief valve body 40 in the relief flow path 16 in the closing direction, a temperature sensor 50 for detecting the temperature of the mixed water in which water and hot water are mixed, and the temperature sensor 50 and an actuator 60 that adjusts the rotation angle of the valve body 20 in accordance with the difference between the temperature obtained at 50 and a predetermined set temperature.

  The housing 10 has a structure in which a water inlet 12, a hot water inlet 13, and a mixed water outlet 14 leading to a gap where the valve body 20 is mounted are formed. In the housing 10, the inlets 12 and 13 and the outlet 14 are arranged in the order of the outlet 14, the water inlet 12, and the hot water inlet 13 from one side in the longitudinal direction of the valve body (pressure receiving portion 26 side). The water inlet 12, the hot water inlet 13, and the outlet 14 are respectively drilled from different outer surfaces of the housing 10 toward the internal gap. The water inlet 12 is connected to a water supply source, the hot water inlet 13 is connected to a hot water supply source, and the outlet 14 is connected to a downstream flow path 80 of the mixing valve.

  The housing 10 is provided with a pressure chamber 19 that faces the pressure receiving portion 26 at the end of the valve body 20 and is a space isolated from the gap portion. In addition, the pressure chamber 19 and the water inlet are provided. A water introduction path 15 is also provided that allows water to be supplied to the water inlet 12 so that the water is supplied to the water inlet 12 and a predetermined water pressure is applied to guide the water to the pressure receiving portion 26 and to apply the water pressure to the pressure receiving portion 26. The The housing 10 is further provided with a relief passage 16 for communicating the water introduction passage 15 and the mixed water outlet 14, and a relief valve body for opening and closing the relief passage 16 in the middle of the relief passage 16. 40, a temperature-sensitive spring 41 made of a shape memory material that biases the relief valve body 40 in a position closer to the outflow port 14 than the relief valve body 40 in the opening direction of the flow path 16, and from the opposite side of the temperature-sensitive spring 41 A relief valve body holding spring 42 that biases the relief valve body 40 in the direction of closing the relief flow path 16 is provided.

  The valve body 20 is formed of a substantially cylindrical body having a hollow portion 21 and a plurality of holes on the outer peripheral surface through which water and hot water are passed, and the inner peripheral surface of the cylindrical surface of the housing 10 inside the housing 10. It is configured to be slidable in contact with the surface and to be rotatable and movable within a predetermined range in the longitudinal direction, and to the water and hot water inlets 12 and 13 in the housing 10 through the holes on the outer peripheral surface. The rotation angle is adjusted by the actuator 60 so as to change the communication state with the actuator 21.

A water inflow hole 22, a hot water inflow hole 23, and an outflow hole 24 are provided on the outer peripheral surface of the valve body 20 so as to correspond to the water inlet 12, the hot water inlet 13, and the outlet 14 on the housing 10, respectively. When the valve body 20, which is formed in the order of the outflow hole 23, the water inflow hole 21, and the hot water inflow hole 22 from one side in the body longitudinal direction and whose rotation angle is adjusted by the actuator 60, moves to one side in the rotation direction. The communication area between the hot water inlet 13 and the hot water inflow hole 23 is narrowed to reduce the inflow amount of hot water, and the communication area between the water inlet 12 and the water inflow hole 22 is widened to increase the inflow amount of water. When 20 moves in the other direction of rotation, the communication area between the hot water inlet 13 and the hot water inflow hole 23 is expanded to increase the amount of hot water inflow, while the communication area between the water inlet 12 and the water inflow hole 22 is narrowed. The amount of inflow is reduced.
Further, the hollow portion 21 communicating with the water inflow hole 22, the hot water inflow hole 23, and the outflow hole 24 of the valve body 20 serves as a flow path of mixed water in which the inflowed water and hot water are mixed.

  In this way, the valve body 20 adjusts the ratio of the amount of water and hot water flowing into the hollow portion 21 by changing the communication state of each of the inflow holes 22 and 23 with respect to the water inlet 12 and the hot water inlet 13. The mixed water at a predetermined temperature obtained by mixing can be sent out of the housing 10 through the hollow portion 21 through the outflow hole 24 and the outflow port 14. In addition, since the outflow hole 24 is formed in a smaller diameter portion than the outer peripheral position that is in sliding contact with the inner peripheral surface of the housing 10 of the valve body 20, the outflow hole 24 communicates with the outflow port 14 regardless of the rotation angle of the valve body 20. .

  At the other end portion in the longitudinal direction of the valve body 20, a connecting shaft portion 25 with the actuator 60 is disposed so as to be relatively movable in the longitudinal direction while being integrally rotatable. It is the structure which can accept | permit the movement of the valve body 20, transmitting this rotational force. A valve body moving spring 30 is disposed around the connecting shaft portion 25.

  The spring 30 for moving the valve body is a coil spring formed of a general spring material that has the property of not easily corroding by contact with water or hot water, but the spring force does not change greatly depending on the temperature. The valve body 20 and the housing 10 are brought into contact with both ends on the other side in the longitudinal direction of the valve body 20, so that the valve body 20 is directed to one side of the valve body longitudinal direction, that is, the valve body 20 is applied with water pressure to the pressure receiving portion 26. Is an arrangement in which an urging force is applied in the opposite direction to control the communication state between each hole of the valve body 20 and the inlets 12 and 13 and the outlet 14 of the housing 10.

  The urging force of the valve body moving spring 30 is less than the pressing force due to the water pressure applied from the water to the pressure receiving portion 26 in the normal supply state of water, and allows the valve body 30 to move in accordance with the water pressure. In the state where the water pressure is not sufficiently applied to the pressure receiving portion 26 such as when the pressure occurs, the valve body 20 is moved in the direction opposite to the direction of the water pressure received by the pressure receiving portion 26 with respect to the housing 10 to move the valve body 20 to each hole and each inlet. And the position which makes communication with an outflow port small, especially the hot water inflow hole 23 will be hold | maintained in the position which does not communicate with the hot water inflow port 13 completely.

  The pressure receiving portion 26 is attached to one end portion in the longitudinal direction of the valve body 20 and is movable in the valve body longitudinal direction integrally with the valve body 20, while being relatively rotatable with respect to the valve body 20. Thus, the valve body 20 is configured not to move when the rotation angle is adjusted. The pressure receiving portion 26 faces the pressure chamber 19 in the housing 10 and receives water pressure from the water guided through the water introduction path 15 in a state where water is supplied to the water inlet 12 and water pressure is applied. In this mechanism, the valve body 20 and the valve body 20 are kept in the state of maximum movement to the other in the longitudinal direction of the valve body.

  The relief valve body 40 is arranged in the middle of the relief flow path 16 so as to be sandwiched between the temperature-sensitive spring 41 and the relief valve body holding spring 42, and comes into contact with the first reduced diameter portion 17 of the relief flow path 16. In this configuration, it is possible to switch between a state in which the escape passage 16 is closed and a state in which the release passage 16 is opened apart from the first reduced diameter portion 17.

  The temperature-sensitive spring 41 has both ends abutting on the relief valve body 40 and the second reduced diameter portion 18 of the relief flow path 16 at positions closer to the outlet 14 than the relief valve body 40 in the relief flow path 16, respectively. Made of shape memory material arranged in a direction in which the relief valve body 40 is pressed and urged in a direction away from the first reduced diameter portion 17 of the relief flow path 16, that is, the release valve body 40 opens the relief flow path 16. The configuration is a coil spring.

  The temperature-sensitive spring 41 has, for example, only hot water flowing into the hollow portion 21 of the valve body 20 and flowing into the outlet 14 when the ambient temperature, that is, the escape passage 16 becomes higher than the normal use temperature range of the mixed water. In a situation where hot water that has not been cooled by water and maintained at a high temperature exists around the spring, such as when it reaches the escape passage 16, it is deformed by the ambient temperature exceeding the transformation point and the distance between both ends of the coil spring is increased. By trying to return to the predetermined memory shape, an urging force larger than that in the normal operating temperature range is generated, and the urging force of the relief valve body holding spring 42 is overcome to release the relief valve body 40 from the closed position. And the relief channel 16 is opened to bring the water introduction channel 15 into communication with the outlet 14.

  The relief valve body holding spring 42 is a coil spring formed of a general spring material that has the property of not easily corroding by contact with water or hot water, but the spring force does not change greatly with temperature. The direction in which the relief valve body 40 is pressed against the first reduced diameter portion 17 of the escape passage 16 at a position closer to the water introduction passage 15 than the relief valve body 40 in the passage 16, that is, the relief valve body 40 blocks the relief passage 16. It is the structure which presses and urges in the direction to do. The urging force of the relief valve body holding spring 42 exceeds the urging force of the temperature sensing spring 41 in a state where the temperature sensing spring 41 is not deformed due to high temperature in the normal use temperature range of the mixed water, and causes the relief valve body 40 to move. While the escape passage 16 is held at the closed position, the temperature-sensitive spring 41 is allowed to move to the open side of the relief valve body 40 due to the deformation in the high temperature deformation state.

The temperature sensor 50 is a known sensor that detects the temperature of the mixed water and outputs temperature information as an electrical signal, and will not be described in detail.
The actuator 60 adjusts a rotation angle by rotating the valve body 20 according to a difference between a temperature obtained by a temperature sensor and a predetermined set temperature preset by a user. The operation in the normal use temperature range of water is the same as that of a known electric actuator provided with an operation control system based on the detected temperature, and detailed description thereof is omitted.

  However, when the temperature sensor 50 detects an abnormal temperature state of the mixed water, the actuator 60 moves to an angular position where the hot water inlet hole 23 of the valve body 20 is in a minimum communication state with the hot water inlet 13 of the housing 10. Then, the position adjustment control operation for rotating the valve body 20 in one of the rotational directions is executed.

  Next, the operation state in the mixing valve device according to the present embodiment will be described. As a premise, the temperature of the mixed water desired by the user for use of the mixed water is set in advance to the actuator 60 of the mixing valve device 1, and water or hot water is appropriately supplied from the supply side. Each of the inlets is reached, and the pressure of the supplied water is applied to the pressure receiving portion 26, and the pressure receiving portion 26 and the valve body 20 are in a state of being close to the other side in the longitudinal direction of the valve body by the water pressure. .

  When an instruction to start delivery of the mixed water is given based on the curan operation on the downstream side of the mixing valve by the user, the temperature of the mixed water in the downstream flow path 80 is acquired by the detection output from the temperature sensor 50 and set in advance. The rotation angle of the valve body 20 is adjusted by the actuator 60 so that the temperature acquired from the temperature sensor 50 matches the measured temperature.

  In a state where the valve body 20 communicates the water inlet 12 and the hot water inlet 13 of the housing 10 together with the hollow portion 21 of the valve body through the inflow holes 22 and 23 (see FIG. 5), water is supplied. Water and hot water flow into the hollow portion 21 through the inflow holes 22 and 23 from the hot water inlet 12 and the hot water inlet 13 to which hot water is supplied, and the water and hot water are mixed in the hollow portion 21 to form mixed water. Water reaches the outlet 14 through the outflow hole 24, and the mixed water is sent from the outlet 14 to the downstream flow path 80.

  In this case, the closed state of the valve body 20 with respect to the water inlet 12 and the hot water inlet 13 varies depending on the angular position of the valve body 20, and the size of the communication region with respect to the inflow holes 22 and 23 of the water inlet 12 and the hot water inlet 13 is large. An amount of water or hot water corresponding to the amount flows into the hollow portion 21, and mixed water having a temperature corresponding to the ratio of water and hot water is obtained. Thus, the ratio of the water flowing from the water inlet 12 and the hot water flowing from the hot water inlet 13 is adjusted by adjusting the communication state between the water inlet 12 and the hot water inlet 13 and the respective inlet holes 22 and 23 by the valve body 20. Obtain the desired mixed water temperature as appropriate. Each time the set temperature is changed, the ratio of water and hot water is changed by changing the rotation angle of the valve body so that the temperature obtained from the temperature sensor 50 matches the set temperature.

  However, when the valve body 20 completely closes the hot water inlet 13 and only the water inlet 12 communicates with the hollow portion 21 (see FIG. 7), only water flows into the hollow portion 21 and only this water flows. The water reaches the outlet 14 and is supplied to the downstream flow path 80 as it is.

  Thus, while water and hot water are appropriately supplied to the water inlet 12 and the hot water inlet 13, the longitudinal position of the valve body 20 is maintained by the water pressure applied to the pressure receiving portion 26, and the water and hot water are held in the hollow portion 21. The mixed water obtained by mixing is kept in the normal use temperature range, the temperature sensitive spring 41 of the escape passage 16 is not in a high temperature deformation state, and the escape passage 16 does not change from the closed state. In addition, the release of water pressure from the water introduction path 15 does not occur.

  On the other hand, if the water supply suddenly drops or stops due to water use in other applications on the water supply side or a malfunction of the supply system, only hot water supply from the hot water supply source is normal. By continuing, the ratio of the inflow of hot water from the hot water inlet 13 to the valve body hollow portion 21 in the housing 10 becomes abnormally large, and as it is, it is not cooled by the mixed water outlet 14 and kept at a high temperature. At this time, the water pressure applied to the pressure receiving part 26 through the water inlet 12, the water introduction path 15, and the pressure chamber 19 is significantly reduced due to a water supply failure. The pressing force disappears, the valve body 20 rapidly moves to one side in the longitudinal direction of the valve body by the urging force of the valve body moving spring 30, and the valve body 20 does not connect the hot water inflow hole 23 and the hot water inlet 13. It reaches the position where the inlet 13 is blocked, and the hot water inlet 1 The stopping quickly the flow of hot water into the hollow portion 21 (see FIG. 8). By blocking the communication between the hot water inlet 13 side and the outlet 14 in this way, high temperature hot water can be reliably prevented from flowing out of the mixing valve through the valve body hollow portion 21, and safety can be ensured.

  Further, although the water supply is normally performed and the water pressure applied to the pressure receiving portion 26 is maintained in a normal state, the rate of inflow of the hot water from the hot water inlet 13 into the valve body hollow portion 25 due to other problems or the like. However, when the temperature becomes abnormally large, hot water that is not cooled sufficiently with water and kept at a high temperature will be discharged from the outlet 14 as it is, but at this time, hot mixed water reaches the escape passage 16 from the outlet 14 and escapes. When the temperature-sensitive spring 41 of the passage 16 comes into contact with the mixed water that has reached a temperature exceeding the transformation point at which the shape is preset in the memory, it is rapidly deformed to extend its entire length, and the relief valve body 40 is released. It moves to the position where the flow path 16 opens, and water is discharged from the water introduction path 15 to the outflow port 14 side through the flow path 16 (see FIG. 10). In this way, the water pressure in the water introduction path 15 is lowered and the water pressure is not appropriately applied to the pressure receiving portion 26, so that the valve body 20 is rapidly moved in one direction in the longitudinal direction of the valve body by the urging force of the valve body moving spring 30 as described above. The inflow of hot water from the hot water inlet 13 into the hollow portion 21 is quickly stopped (see FIG. 9).

  However, even in a state where the valve body 20 moves and closes the hot water inlet 13, the water inlet 12 and the outlet 14 partially communicate with the water inlet hole 22 and the outlet hole 24 of the valve body 20, respectively. Since it is not completely closed, the temperature of the water supply and the mixed water returns to normal, and the water immediately flows into the valve body hollow portion 21 before an appropriate water pressure is applied to the pressure receiving portion 26. The outlet 14 will be reached. In this way, when the valve body 20 is moved by water pressure and hot water can flow into the hollow portion 21, the water comes out from the outlet 14 in advance and the hot water can be reliably cooled in the hollow portion 21, which is safe. Is secured.

  As described above, in the mixing valve device according to the present embodiment, when the water and hot water constituting the mixed water are normally supplied, the valve body 20 is formed in the outer holes 22 and 23 and the housing 10 by the water pressure of the water. When the water and hot water inflow ports 12 and 13 are held in positions where they can communicate with each other and the flow rate of water and hot water can be adjusted by the rotation of the valve body 20, the pressure receiving portion When sufficient water pressure is not applied to the valve body 26, the valve body 20 moves in the longitudinal direction as the valve body moving spring 30 is biased, and the valve body 20 closes the hot water inlet 13. In an abnormal state where the pressure does not reach the valve body 20, the valve body 20 that has not received an appropriate water pressure at the end pressure receiving portion 26 is immediately moved by the urging force of the valve body moving spring 30, and the valve body 20 is moved to the hot water inlet 13. Will be closed promptly, mixing due to water supply failure In abnormal high temperature capable of becoming situation, suppressed the inflow of hot water, a situation can be prevented that accidentally high-temperature water flowing downstream can ensure safety.

(Second embodiment of the present invention)
Note that, in the mixing valve device according to the first embodiment, the temperature of the mixed water due to a malfunction is present despite the situation in which the water supply to the water inlet 12 continues and the water pressure is appropriately applied to the pressure receiving unit 26. In response to an abnormally high value, a relief passage 16 that connects the water introduction passage and the outlet and a mechanism that opens and closes the relief passage 16 are provided to the downstream passage 80 of the high-temperature mixed water. However, instead of these, as a second embodiment, when the temperature sensor 50 detects an abnormal temperature state of the mixed water, as shown in FIGS. It is also possible to provide a control valve unit 70 that opens a part of 15 to release water pressure and lowers the water pressure applied to the pressure receiving unit 26 to move the valve body 20.

  The control valve unit 70 is connected to the water introduction path 15 and when the temperature sensor 50 detects an abnormal temperature state of the mixed water, the control valve unit 70 is connected to the water introduction path 15 from the outlet 14 or the downstream side flow path 80. A valve that releases the pressure of water in an open state toward a low-pressure flow path, and that receives the urging force of the valve body moving spring 30 by reducing the water pressure applied to the pressure receiving portion 26 through the water introduction path 15. The body 20 moves to one side of the valve body longitudinal direction.

  Regarding the operating state of the mixing valve device according to the second embodiment, when water or hot water is normally supplied and the mixed water is in the normal use temperature range, the supply amount of water suddenly decreases or is supplied. The case where is stopped is the same as in the first embodiment. On the other hand, although the water supply is normally performed and the water pressure applied to the pressure receiving portion 26 is maintained in a normal state, the rate of inflow of hot water from the hot water inlet 13 into the valve body hollow portion 25 due to other problems or the like. Is abnormally large, the hot water is not sufficiently cooled by the water in the hollow portion 21 and mixed water that maintains the high temperature of the hot water is generated, and the temperature sensor 50 detects an abnormally high temperature of the mixed water. Based on this, the control valve unit 70 opens the water introduction path 15 and causes water to flow out from the water introduction path 15 (see FIG. 12). In this way, the water pressure in the water introduction passage 15 is lowered and the water pressure is not appropriately applied to the pressure receiving portion 26, whereby the valve body 20 rapidly moves in one direction in the valve body longitudinal direction, and the hot water from the hot water inlet 13 to the hollow portion 21 is moved. The inflow of water is stopped quickly, and high temperature mixed water can be reliably prevented from being sent to the downstream side of the mixing valve.

  In the mixing valve device according to each of the above embodiments, the rotation angle of the valve body 20 for adjusting the temperature of the mixed water is adjusted by the actuator 60. A configuration in which the rotation angle of the valve body is manually adjusted such that the user directly moves the attached handle or the like can also be adopted.

  In the mixing valve device according to each of the above embodiments, only the hot water inlet 13 with respect to the hollow portion 21 of the valve body 20 is accompanied by the movement of the valve body 20 in a state where the water pressure is not properly applied to the pressure receiving portion 26. Is closed, and the water inlet 12 and outlet 14 are not completely blocked. However, the present invention is not limited to this, and the amount of movement of the valve body by the spring when the water pressure drops, the inflow hole and the outflow in the valve body It is also possible to adjust the size of the hole so that the valve body moves and the water inlet and outlet together with the hot water inlet are closed with respect to the hollow part of the valve body.

DESCRIPTION OF SYMBOLS 1 Mixing valve apparatus 10 Housing 12 Water inlet 13 Hot water inlet 14 Outlet 15 Water introduction path 16 Escape flow path 17 1st reduced diameter part 18 2nd reduced diameter part 19 Pressure chamber 20 Valve body 21 Hollow part 22 Water inflow hole 23 Hot water inflow hole 24 Outflow hole 25 Connecting shaft part 26 Pressure receiving part 30 Valve body moving spring 40 Relief valve body 41 Temperature sensing spring 42 Relief valve body holding spring 50 Temperature sensor 60 Actuator 70 Control valve part 80 Flow path

Claims (3)

A housing in which each inlet of water and hot water leading from the outside to the internal gap is drilled, and a plurality of holes are drilled in the peripheral side surface so as to be rotatable in the gap of the housing. A cylindrical and hollow valve body, and with respect to each inlet of water and hot water in the housing, the rotation angle of the valve body is adjusted so as to change the communication state between each inlet and each hole, In a mixing valve device capable of sending out a mixed water of a predetermined temperature obtained by adjusting a ratio of an inflow amount of supplied water and hot water into the hollow portion of the valve body, out of the housing,
The valve body is movable within a predetermined range to a position where the valve body is not communicated by shifting the hole in the longitudinal direction of the valve body at least with respect to the inlet of the hot water,
Both ends of the valve body and the housing are brought into contact with each other so that the valve body is pressed and urged in one direction in the longitudinal direction of the valve body from a position where the hole does not communicate with the inlet of the hot water. A spring for moving the valve body,
A pressure receiving portion that is disposed at the end of the valve body and receives a water pressure from the supplied water in a direction opposite to a biasing direction of the valve body moving spring;
A water introduction path that guides water from the water inlet to the pressure receiving portion in the housing and allows the water pressure to be applied to the pressure receiving portion;
In a state in which water is supplied to the water inlet and the pressure receiving portion receives water pressure, the valve body is held at a longitudinal position where the holes can communicate with the inlets, while the water inlet In the state where water is not supplied, the valve body moves to a position where at least the hole does not communicate with the hot water inlet in accordance with the biasing force of the valve body moving spring. The mixing valve device according to claim 1,
An escape passage for connecting the outlet of the mixed water in the housing and the water introduction path;
A relief valve element disposed in the relief flow path and opening and closing the relief flow path;
It is arranged closer to the outlet than the relief valve body in the escape passage, and is arranged to urge the relief valve body in the release passage opening direction, and the ambient temperature is higher than the normal use temperature range of the mixed water. A temperature-sensitive spring made of a shape memory material that is deformed so as to move the relief valve body to the release passage position when the temperature becomes high;
The escape valve body is arranged so as to be urged in the direction of closing the escape flow path, and the escape valve body is kept in the closed flow path closed state in the normal use temperature range of the mixed water, while in the high temperature deformation state of the temperature sensitive spring A mixing valve device comprising: a relief valve body holding spring that allows the relief valve body to move to the relief flow path opening position in accordance with the deformation. In the mixing valve device according to claim 1 or 2,
A temperature sensor for detecting the temperature of the mixed water;
And a control valve portion that opens a part of the water introduction path and releases the water pressure applied to the pressure receiving portion to the outside when the temperature sensor detects an abnormal temperature state of the mixed water. Valve device.

Images