JPH0893938A - Mixing valve and water combination device - Google Patents

Abstract

PURPOSE: To provide a mixing valve and a water combination device in which linearity between rotation angle of a valve body and hot/cold water mixed flow quantity is excellent and temperature adjustment is easy. CONSTITUTION: A valve body disposed rotatably within a housing 14 having a hot water inflow path 15 and a cold water inflow path 16, and a mixed flow outflow path 19, having a hot water inlet hole 18 and o cold water inlet hole 19 on side face and an outlet hole on side face, and a partitioning wall 21 between the hot water inlet hole 18 and the cold water inlet hole, are disposed. And thus, hot water and cold water entering through the hot water inlet hole 18 and the cold water inlet hole 19 flow along front and rear of continuous direction and so are mixed together naturally, so that flow interference such as to suppress the other due to dynamic pressure in water flow is prevented. Linearity between rotation angle of a valve body 12 and hot/cold water mixed flow quantity is excellent and stable mixed temperature control is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixing valve and a hot-water mixing apparatus capable of mixing flow rates, for example, mixing hot water and water to supply hot water at an appropriate temperature.

[0002]

2. Description of the Related Art A conventional mixing valve and hot water mixing device of this type (for example, Japanese Utility Model Laid-Open No. 62-119586) are shown in FIGS. 9, 10 and 11. In the figure, 1 is a valve body, 2 and 3 are inlet ports, and 4 is an outlet port. The valve chamber 1a between the inlet ports 2 and 3 of the valve body 1 is formed in a tubular shape, and the tubular valve body 5 having an outer diameter matching the inner diameter of the valve chamber 1a rotates in a watertight manner. It is arranged to be movable. A drive shaft 7 of a stepping motor 6 mounted on the upper end surface of the valve body 1 is fixed to the center of one end 5a of the valve body 5, and the other end 5b is open and communicates with the outlet port 4. In addition, as shown in FIG.
Openings 5c and 5d are formed at one place, and one opening 5c communicates with the inlet port 2 and the other opening 5d.
Communicates with the inlet port 3.

When the valve body 5 is rotated by the stepping motor 6, the opening areas of the inlet ports 2 and 3 are changed, and the valve chamber 1a passes from the inlet ports 2 and 3 through the openings 5c and 5d.
The flow rates of cold water and hot water flowing into the inside are variable. As shown in the flow rate characteristic diagram of FIG. 12, as the rotation angle position θ of the valve element 5 is rotated by the stepping motor 6, the flow rate of cold water increases and at the same time the flow rate of hot water decreases. When the stepping motor 6 is rotated in the reverse direction, the valve body 5 is also rotated in the reverse direction, so that the cold water flow rate decreases and the hot water flow rate increases. The hysteresis of the flow rate characteristic diagram is caused by the backlash of the reduction gear of the stepping motor 6. Further, the linearity of the flow diagram on the hot water side is not good because, in general, the hot water supply pressure acting on the hot water inlet port 3 is lower than the water side supply pressure acting on the hot water inlet port 2, When the opening area of the inlet port 3 starts to be reduced and the opening area of the inlet port 3 starts to be narrowed, the force of the water flow flowing from the inlet port 2 into the opening portion 5c of the valve body 5 blocks the hot water flowing from the inlet port 3 into the opening portion 5d of the valve body 5. This is because the dynamic pressure on the water side acts and the gradient of the decrease in the melt-side flow rate changes with the rotation angle of the valve element 5.

A mixing blade 8 is provided on the other end 5b side of the valve body 5.
Are arranged. The cold water and hot water that have flowed into the valve chamber 1a from the inlet ports 2 and 3 generate a turbulent flow when passing through the mixing blades 8 and are forcibly mixed.

A thermistor 9 for detecting the temperature of cold water and hot water mixed by the mixing blade 8 is arranged in the outlet port 4. The detection signal of the thermistor 9 is output to the electronic controller 10, the deviation amount from the target temperature is obtained here, and a control signal corresponding to the deviation amount is output from the electronic controller 10 to the stepping motor 6.

FIG. 11 shows a water heater equipped with the mixing valve. Reference numeral 111 is an electric water heater, and 112 is a pressure reducing valve. Valve body 1 from electric water heater 111 through pipe 113
While hot water is supplied to the inlet port 3 of the
2. Cold water is supplied through the pipe 114 to the inlet port 2 of the valve body 1.
Is supplied to. The cold water and the hot water supplied to the inlet ports 2 and 3 are forcibly mixed by the mixing blade 8 to become mixed water, and then the temperature is immediately detected by the detecting means 9 in the outlet port 4. The detection signal is output to the electronic controller 10, and the control signal is output from the electronic controller 10 to the stepping motor 6 to change the opening degree of the inlet ports 2 and 3 so that the target temperature is reached. Then, the mixed water adjusted to the target temperature is supplied from the outlet port 4 to each place via the pipe 115.

[0007]

However, in the conventional mixing valve and hot water mixing apparatus as described above, the mixing flow rate change of the hot water and the hot water depending on the conditions of the water supply pressure and the hot water supply pressure is varied. It is bent like 12, and it is difficult to change the mixing temperature smoothly with respect to the rotation angle of the valve body 5, or the electronic controller 10 causes the stepping motor 6 to rotate.
Even if the valve body 5 is drive-controlled to keep it at the target temperature, the mixed hot water temperature hunts and fluctuates, and there is a problem that the response speed when the target temperature is changed becomes slow. .

The present invention is intended to solve the above problems,
It is a first object of the present invention to provide a mixing valve which has excellent linearity in the change of the mixing flow rate of hot and cold water with respect to the rotation angle of the valve element and which can easily change the mixing temperature smoothly with respect to the rotation angle of the valve element.

A second object is that the mixing flow rate of the hot and cold water with respect to the rotation angle of the valve disc is excellent in linearity, and the valve disc can be rotated by a motor to smoothly change the mixing temperature at substantially the same rate of change with respect to the rotation angle. Providing a mixing valve.

A third object is that the mixing flow rate change of the hot and cold water with respect to the rotation angle of the valve element is excellent, and the motor can rotate the valve element to smoothly change the mixing temperature at substantially the same rate of change with respect to the rotation angle. It is an object of the present invention to provide a hot and cold water mixing device capable of controlling a stable mixed hot water temperature without hunting by a mixing valve controller.

A fourth object of the present invention is to provide a hot and cold water mixing apparatus capable of stably controlling the temperature of the mixed hot water discharge even when there are fluctuations in the supply pressures on the hot water side and the water side and imbalances in the supply pressures.

A fifth object of the present invention is to provide a hot and cold water mixing apparatus which has a long service life and can perform stable temperature control of the mixed hot water discharge without hunting without rotating the stepping motor more than necessary.

[0013]

In order to achieve the above first object, a mixing valve of the present invention comprises a housing having a hot water inflow path, a water inflow path, and a mixed outflow path, and is rotatable in the housing. The valve body is provided with a hot water inlet hole and a water inlet hole on the side surface and an outlet hole at the end surface, and a partition wall is provided between the hot water inlet hole and the water inlet hole of the valve body.

In order to achieve the above-mentioned second object, the mixing valve of the present invention comprises a housing having a hot water inflow path, a water inflow path, and a mixed outflow path, and a hot water inlet provided rotatably in the housing. A valve body having a hole, a water inlet hole, and an outlet hole on an end surface, a partition wall provided between the hot water inlet hole and the water inlet hole of the valve body, a motor for rotationally driving the valve body, and the motor Is provided with a rotary power transmission portion for transmitting the rotation of the valve body to the valve body.

In order to achieve the third object, the hot and cold water mixing apparatus of the present invention comprises a housing having a hot water inflow path, a water inflow path, and a mixed outflow path, and a rotatably provided side surface of the housing. A valve body having an inlet hole, a water inlet hole, and an outlet hole at an end surface, a partition wall provided between the hot water inlet hole and the water inlet hole of the valve body, a motor for rotationally driving the valve body, and A mixing temperature detector for detecting the temperature of the mixed hot water downstream of the outlet hole, a temperature setter for setting the mixed hot water temperature, and a comparison calculation based on signals from the mixed temperature detector and the temperature setter to drive the motor. It is provided with a mixing valve controller.

In order to achieve the above-mentioned fourth object, the hot and cold water mixing apparatus of the present invention provides a housing having a hot water inflow path, a water inflow path and a mixed outflow path, and pressures in both the hot water inflow path and the water inflow path. An inflow differential pressure reducing valve that receives and automatically narrows the flow path with a higher pressure according to the differential pressure, and a rotatably provided inside the housing and a hot water inlet hole, a water inlet hole, and an end surface on the side surface. A valve body having an outlet hole, a partition wall provided between the hot water inlet hole and the water inlet hole of the valve body, a motor for rotationally driving the valve body, and a mixed hot water temperature downstream of the outlet hole. A mixing temperature detector for detecting, a temperature setting device for setting the temperature of the mixed hot water, and a mixing valve controller for driving the motor by performing a comparison calculation based on the signals from the mixing temperature detector and the temperature setting device. Is.

In order to achieve the fifth object, the hot and cold water mixing apparatus of the present invention comprises a housing having a hot water inflow path, a water inflow path, and a mixed outflow path, and a hot water rotatably provided inside the housing. A valve body having an inlet hole, a water inlet hole, and an outlet hole on the end surface, a partition wall provided between the hot water inlet hole and the water inlet hole of the valve body, and a stepping motor for rotationally driving the valve body, A position detector that detects at least one rotational position of the output shaft of the stepping motor, and a position detection circuit that resets to zero with a detection signal of the position detector and detects the rotational position of the stepping motor by the number of drive pulses from the position detector. A mixing temperature detector for detecting the temperature of the mixed hot water downstream of the outlet hole, a temperature setter for setting the temperature of the mixed hot water, and based on signals from the mixed temperature detector, the temperature setter, and the position detection circuit. It is provided with a mixing valve controller for driving and controlling the stepping motor.

[0018]

The mixing valve of the present invention comprises a hot water inlet hole rotatably provided in the housing, a valve body having a water inlet hole and a water inlet hole and an end hole at the end face, and a hot water inlet hole of the valve body. By installing a partition wall between the water inlet hole and the water inlet hole, direct flow interference that blocks either flow due to the dynamic pressure of the water flow from the water inlet hole of the valve body or from the hot water inlet hole is prevented. To be done.
Therefore, the linearity of the mixing flow rate change of the hot and cold water with respect to the rotation angle of the valve body is excellent, and the smooth mixing temperature change with respect to the rotation angle of the valve body becomes possible.

In the mixing valve of the present invention, the valve body is provided rotatably in the housing and has a hot water inlet hole, a water inlet hole, and an outlet hole on the end surface, and the valve element is rotationally driven. By providing a partition wall between the motor and the hot water inlet hole and the water inlet hole of the valve body, either flow can be controlled by the dynamic pressure of the water flow from the water inlet hole of the valve body and from the hot water inlet hole. Direct flow interference, such as blocking, is prevented. Therefore, the linearity of the change in the mixing flow rate of the hot and cold water with respect to the rotation angle of the valve body is excellent, and it becomes possible to rotate the valve body by the motor and smoothly change the mixing temperature at the same change rate with respect to the rotation angle of the motor.

The hot and cold water mixing apparatus of the present invention includes a housing having a hot water inflow path, a water inflow path, and a mixing outflow path, and a rotatably provided inside the housing, which has a hot water inlet hole, a water inlet hole, and an end surface. A valve body having an outlet hole, a partition wall provided between the hot water inlet hole and the water inlet hole of the valve body, a motor for rotationally driving the valve body, and a mixed hot water temperature downstream of the outlet hole. A mixing temperature detector for detecting, a temperature setter for setting the temperature of the mixed hot water, and a mixing valve controller for driving the motor by performing a comparison calculation based on the signals from the mixing temperature detector and the temperature setting device are provided. As a result, direct flow interference that blocks either flow due to the dynamic pressure of the water flow from the water inlet hole of the valve body and from the hot water inlet hole is prevented. Therefore, the linearity of the change of the mixing flow rate of the hot and cold water with respect to the rotation angle of the valve body is excellent, the valve body is rotated by the motor, and the mixing temperature can be smoothly changed at almost the same rate of change with respect to the rotation angle, and the hunting is performed by the mixing valve controller. It is possible to control the temperature of the mixed tap water without any problems.

Further, the hot and cold water mixing apparatus of the present invention receives the pressure of both the housing having the hot water inflow path, the water inflow path, and the mixed outflow path, and receives a pressure in accordance with the pressure difference between the housing and the hot water inflow path. Inflow differential pressure reducing valve that automatically narrows the higher flow path, and a valve element that is rotatably provided in the housing and that has a hot water inlet hole and a water inlet hole in the side surface and an outlet hole in the end surface, A partition wall provided between the hot water inlet hole and the water inlet hole of the valve body, a motor that rotationally drives the valve body, a mixing temperature detector that detects a mixed hot water temperature downstream of the outlet hole, By providing a temperature setting device for setting the hot water temperature and a mixing valve controller for driving the motor by performing a comparison calculation based on the signals from the mixing temperature detector and the temperature setting device, the inflow differential pressure reducing valve Even if there is a fluctuation in the supply pressure on the hot water side or the water side or an imbalance in the supply pressure, Each inlet pressure acting on the water inlet hole and the hot water inlet hole of the body becomes a value close. Further, the partition wall prevents direct interference between the water inlet port of the valve body and the direct flow of the water port due to the dynamic pressure of the water stream from the hot water inlet port. Therefore, the linearity of the change of the mixing flow rate of the hot and cold water with respect to the rotation angle of the valve disc is excellent, the motor can rotate the valve disc, and the mixing temperature can be changed smoothly at almost the same rate of change with respect to the rotation angle. Even if there is a fluctuation in the supply pressure or an imbalance in the supply pressure, stable mixed hot water temperature control becomes possible.

Further, the hot and cold water mixing apparatus of the present invention includes a housing having a hot water inflow path, a water inflow path, and a mixing outflow path, and a rotatably provided inside the housing having a hot water inlet hole, a water inlet hole, and an end surface on the side surface. A valve body having an outlet hole, a partition wall provided between the hot water inlet hole and the water inlet hole of the valve body, a stepping motor for rotationally driving the valve body, and a rotational position of an output shaft of the stepping motor. A position detector for detecting at least one position, a position detection circuit for resetting zero with a detection signal from the position detector and detecting the rotational position of the stepping motor based on the number of drive pulses from the position detector, and a mixing downstream of the outlet hole. Mixing temperature detector for detecting hot water temperature, temperature setting device for setting mixed hot water temperature, driving the stepping motor based on signals from the mixing temperature detector, temperature setting device and position detection circuit By providing a mixing valve controller to control, the rotation position of the stepping motor and the valve element can always be recognized by the position detector and the position detection circuit, and stepping is performed from the set temperature of the temperature setting device and the mixing temperature of the mixing temperature detector. The rotation direction of the motor is immediately judged and instructed by the mixing valve controller, and the effective rotation range of the stepping motor, that is, the rotation position at which the rotation does not approach the target temperature even if it rotates more than that, can be accurately recognized. Therefore, it is possible to prevent unnecessary rotation load from being applied to the stepping motor, the valve body, and other rotation transmission parts. Further, the partition wall prevents direct interference between the water inlet port of the valve body and the direct flow of the water port due to the dynamic pressure of the water stream from the hot water inlet port. Therefore, the linearity of the change of the mixing flow rate of the hot and cold water with respect to the rotation angle of the valve element is excellent, the valve element is rotated by the motor, and the mixing temperature can be changed smoothly at almost the same rate of change with respect to the rotation angle. A hot and cold water mixing device with a long life is realized.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a mixing valve 11 showing a first embodiment of the present invention, and FIGS. 2 (a) to 2 (d) are A- of FIG.
FIG. 3 is a sectional view of A, and FIG. 3 is a perspective view of a valve body 12 and a valve shaft 13. In the figure, 14 is a housing, which has a hot water inflow path 15, a water inflow path 16, and a mixing outflow path 17. Reference numeral 12 is a substantially spherical valve body rotatably provided in the housing 14, and the valve body 12 has a hot water inlet hole 18 and a water inlet hole 19 on its side surface and an outlet hole 20 on its end face.
A partition wall 21 is formed between the hot water inlet hole 18 and the water inlet hole 19 inside. Further, as shown in FIG. 3, the tip projection 2 of the valve shaft 13 is provided at the end of the valve body 12 on the side opposite to the outlet hole 20.
A concave groove 23 into which 2 is inserted is formed.

A ring-shaped groove 25 is formed in the shaft seal portion 24 of the valve shaft 13, and an elastic seal member 26 having an X-shaped cross section is provided in the groove 25. Furthermore, the valve shaft 13
A shaft hole 29 into which the drive shaft 28 of the operation knob 27 is inserted is formed at the end portion on the opposite side of the convex portion 22. Shaft hole 29
3 has a shape in which two circular arc portions are symmetrically shaved off as shown in FIG. 3, and the valve body 12 is rotated by the rotation of the drive shaft 28 of the operation knob 27.

Further, the valve body 1 is provided outside the shaft hole 29 of the valve shaft 13.
A rotation angle regulating member 30 that regulates the rotation range angle of 2 is provided. Reference numeral 33 is a temperature detector for detecting the mixing temperature.

Ring-shaped seal members 31 and 32 are mounted between the hot water inflow passage 15 and the valve body 12 of the housing 14 and between the water inflow passage 16 and the valve body 12, respectively.

The operation of this embodiment having the above configuration will be described. FIG. 2A shows a state in which the hot water inlet hole 18 is fully opened and the water inlet hole 19 is fully closed. The water inflow passage 16 and the mixing outflow passage 17 do not communicate with each other, and the housing 14
The seal member 32 between the valve body 12 and the valve body 12 prevents internal leakage on the water side. 2 (b) shows a state in which the hot water inlet hole 18 and the water inlet hole 19 are both half-open, and the hot and cold water is mixed in half and flows out into the mixing outflow passage 17. In FIG. 2 (c), the hot water inlet hole 18 is about 20%. FIG. 2D shows a state in which the water inlet hole 19 is opened and the water inlet hole 19 is opened by about 80%.
Shows the state in which the hot water inlet hole 18 is fully closed and the hot water inlet channel 15 and the mixed outflow channel 17 do not communicate with each other, and the seal member 31 between the housing 14 and the valve body 12 prevents water from entering. Side internal leakage is prevented.

As shown in FIG. 2 (b), the valve body 12 is the hot water inlet hole 1
When the valve 8 and the water inlet hole 19 are both in the half-opened state, hot water first flows into the inside of the valve body 12 from the hot water inlet passage 18 on the side surface of the valve body 12, and then the outlet hole 2 along the partition wall 21.
Flow to 0. At the same time, water flows from the water inflow passage 16 to the water inlet hole 19
Flows into the inside of the valve body 12 and flows along the partition wall 21 to the outlet hole 20. In this way, the hot water and the water are separated by the partition wall 21 formed inside the valve body 12, flow in parallel in the front and back, and reach the mixing outflow passage 17 of the housing 14 through the outlet hole 20 of the valve body 12. In the case of the conventional mixing valve of FIGS. 9 and 10, from the inlet port 2 to the opening 5 of the valve body 5.
The flow of water flowing into the valve body 5 via c and the flow of hot water flowing into the valve body 5 from the other inlet port 3 through the opening 5d collide head-on with each other, and the flow of water with high supply pressure Acts so as to suppress the flow of hot water having a low supply pressure by its dynamic pressure, and the change in the mixed flow rate of hot and cold water with respect to the rotation angle of the valve body 5 bends as shown in FIG. However, in the present embodiment, since the hot water and the water are naturally mixed by the partition wall 21 while keeping the forward flow parallel to each other, the hot water and the water are supplied to the respective inlets. The flow rate can be varied according to the opening degree of the holes 18 and 19, that is, the rotation angle of the valve body 12, and the flow rate characteristic has excellent linearity as shown in the diagram of FIG.

Therefore, the temperature of the mixed hot water can be changed smoothly according to the rotation angle of the operation knob 27, and the temperature of the mixed hot water can be easily adjusted and the usability is good.

As described above, according to this embodiment, the valve body is provided rotatably in the housing 14 and has the hot water inlet hole 18 and the water inlet hole 19 provided on the side surface and the outlet hole 20 at the end surface. 12, hot water inlet hole 18 of valve body 12 and water inlet hole 1
By providing the partition wall 21 between the valve body 12 and
The direct pressure interference of blocking either flow due to the dynamic pressure of the water flow from the water inlet hole 19 and from the hot water inlet hole 18 is prevented. Therefore, the linearity of the change in the mixing ratio of hot and cold water with respect to the rotation angle of the valve body 12 is excellent, and it becomes possible to smoothly change the mixing temperature with respect to the rotation angle of the valve body 12.

FIG. 5 is a configuration diagram of a mixing valve 34 showing a second embodiment of the present invention. The difference from the configuration of the mixing valve 11 of FIG. 1 is that the operation knob 28 for driving the valve body 12 and the drive thereof are driven. The shaft 28 is composed of the motor 35 and the drive shaft 36, and in addition to the function and effect of the mixing valve 11 of the first embodiment of the present invention, the mixed hot water temperature can be smoothly changed according to the rotation angle of the motor 35. It is variable and easy to adjust the temperature of the mixed hot water.

As described above, according to this embodiment, the valve body 12 having the hot water inlet hole 18 and the water inlet hole 19 provided rotatably in the housing 14 and provided on the side surface and the outlet hole 20 on the end face. And by providing the partition wall 21 between the hot water inlet hole 18 and the water inlet hole 19 of the valve body 12, whichever the dynamic pressure of the water flow from the water inlet hole 19 of the valve body 12 and the hot water inlet hole 18 The interference of directly opposed flows that would block the flow is prevented. Therefore, the linearity of the change in the mixing ratio of hot and cold water with respect to the rotation angle of the valve body 12 is excellent, and it becomes possible to smoothly change the mixing temperature with respect to the rotation angle of the valve body 12. Therefore, the linearity of the change of the mixing flow rate of the hot and cold water with respect to the rotation angle of the valve body 12 is excellent, and the valve body 12 is rotated by the motor 35, and the smooth mixing temperature change can be performed at the substantially same change rate with respect to the rotation angle of the motor 35. Become.

FIG. 6 is a block diagram of a hot and cold water mixing apparatus 37 showing a third embodiment of the present invention. A mixing temperature detector for detecting the temperature of the mixed hot water downstream of the outlet hole 20 in the mixing valve 34 of FIG. 33
And a temperature setting device 38 for setting the temperature of the mixed hot water, and a mixing valve controller 39 for driving the motor 35 by performing a comparative calculation based on signals from the mixing temperature detector 33 and the temperature setting device 38. When the set hot water temperature is set by the setting device 38, the mixed hot water temperature is detected by the temperature detector 33, which is a thermistor, and the set temperature signal of the temperature setter 38 and the mixed hot water temperature signal of the temperature detector 33 are mixed. The valve controller 39 takes in and performs a comparison calculation, inputs a drive signal in a direction to eliminate the deviation to the motor 35, controls the rotation of the valve body 12, and adjusts the mixing ratio of hot water and water while adjusting the mixing temperature. To keep the temperature at the set temperature. At this time, in the conventional mixing valve and hot-water mixing apparatus shown in FIGS. 9 to 11, the mixed flow rate change of hot-water with respect to the rotation angle of the valve body 5 is changed as shown in FIG. 12 depending on the conditions of the water-side supply pressure and the hot-water supply pressure. It is difficult to change the mixing temperature smoothly with respect to the rotation angle of the valve body 5, or even if the electronic controller 10 drives and controls the stepping motor 6 and the valve body 5 to keep the temperature at the target temperature. However, in the present embodiment, the hot water and the water flow in the forward direction parallel to each other by the partition wall 21. As the composition is naturally mixed as it is, hot water and hot water are supplied to the inlet holes 18 and 1 respectively.
The flow rate can be varied according to the opening degree of 9, that is, the rotation angle of the valve body 12, and the flow rate characteristics with excellent linearity as shown in the diagram of FIG. 4 can be obtained, and according to the rotation angle of the motor 35 and the valve body 12. As a result, the hot water temperature can be changed linearly and smoothly, and the mixed hot water temperature can reach and be maintained at the target temperature with a quick response without any problems such as hunting.

As described above, according to this embodiment, the housing 14 having the hot water inflow path 15, the water inflow path 16 and the mixed outflow path 17, and the hot water inlet hole 18 formed in the housing 14 so as to be rotatable. And water inlet hole 19 and outlet hole 20 on the end face
12 having a valve, a partition wall 21 provided between the hot water inlet hole 18 and the water inlet hole 19 of the valve body 12, a motor 35 for rotationally driving the valve body 12, and mixing downstream of the outlet hole 20. Mixing temperature detector 33 for detecting hot water temperature, temperature setting device 38 for setting hot water temperature, mixing temperature detector 33 and temperature setting device 38
The mixing valve controller 39 that drives the motor 35 by performing a comparison calculation based on the signal from the water is supplied to either the water inlet hole 19 of the valve body 12 or the hot water inlet hole 18 by the dynamic pressure of the water flow. Direct flow interference that would block the Therefore, the linearity of the change in the mixed flow rate of the hot and cold water with respect to the rotation angle of the valve body 12 is excellent, and the motor 35 drives the valve body 12
The mixing temperature can be smoothly varied with the same change rate with respect to the rotation angle, and the mixing valve controller 39 can perform stable mixing hot water temperature control without hunting.

FIG. 7 is a constitutional view of a hot and cold water mixing apparatus 40 showing a fourth embodiment of the present invention, and FIGS. 2 (a) to 2 (d) are sectional views taken along line AA of FIG. 6 is different from the configuration of the hot and cold water mixing device 37 in FIG.
6 is provided with an inflow differential pressure reducing valve 41 for automatically narrowing the pressure 6, and in addition to the action and effect of the hot and cold water mixing apparatus 37 of the third embodiment of the present invention, fluctuations in supply pressure and supply of hot water and water Even if there is an imbalance in pressure, the respective inlet pressures acting on the water inlet hole 19 and the hot water inlet hole 18 of the valve body 12 are close to each other, and stable mixing is achieved even if there is fluctuation in supply pressure or imbalance in supply pressure. It is possible to control the outlet temperature.

As described above, according to this embodiment, the housing 14 having the hot water inflow path 15, the water inflow path 16 and the mixed outflow path 17, and the pressures of both the hot water inflow path 15 and the water inflow path 16 are applied. An inflow differential pressure reducing valve 41 that automatically narrows a flow path having a higher pressure in accordance with the differential pressure, and a hot water inlet hole 18, a water inlet hole 19 and an end surface on a side surface that is rotatably provided in the housing 14. A valve body 12 having an outlet hole 20 in the interior thereof, and a partition wall 2 provided between a hot water inlet hole 18 and a water inlet hole 19 of the valve body 12.
1, a motor 35 that rotationally drives the valve body 12, and an outlet hole 2
A mixing temperature detector 33 for detecting the temperature of the mixed hot water downstream of 0;
By providing the temperature setting device 38 for setting the temperature of the mixed hot water and the mixing valve controller 39 for driving the motor 35 by performing a comparison calculation based on the signals from the mixing temperature detector 33 and the temperature setting device 38, the inflow differential pressure is increased. The inlet pressures acting on the water inlet hole 19 and the hot water inlet hole 18 of the valve body 12 are close to each other even if the supply pressure fluctuations and the supply pressure imbalances on the hot water side and the water side are caused by the reduction valve 45. Further, the partition wall 21 prevents direct flow interference such as blocking one of the flows due to the dynamic pressure of the water flow from the water inlet hole 19 of the valve body 12 and from the hot water inlet hole 18. Therefore, the linearity of the change in the mixed flow rate of the hot and cold water with respect to the rotation angle of the valve body 12 is excellent, and the motor 3
5, the valve body 12 is rotated, and the mixing temperature can be smoothly changed at almost the same rate of change with respect to the rotation angle thereof, and moreover, the mixing hot water is stable even if there are fluctuations in the supply pressure on the hot water side and the water side and imbalances in the supply pressure. Temperature control becomes possible.

FIG. 8 is a block diagram of a hot and cold water mixing apparatus 42 showing a fifth embodiment of the present invention, and FIGS. 2 (a) to 2 (d) are sectional views taken along the line AA of FIG. The difference from the configuration of the hot and cold water mixing device 37 of FIG. 6 is that a position detector 44 detects at least one rotational position of the drive shaft 36 of the stepping motor 43 that rotationally drives the valve body 12, and a detection signal of the position detector 44. A position detection circuit 4 for resetting the zero to zero and detecting the rotational position of the stepping motor 43 based on the number of drive pulses from there.
5, the mixing temperature detector 33, the temperature setting device 38, and the mixing valve controller 46 for driving and controlling the stepping motor 43 based on the signals from the position detecting circuit 44. In addition to the action and effect of the hot and cold water mixing device 37, the rotational positions of the stepping motor 43 and the valve body 12 can always be recognized by the position detector 44 and the position detection circuit 45, and the set temperature of the temperature setter 38 and the mixed temperature detector 33 are mixed. The rotation direction of the stepping motor 43 is immediately judged and instructed by the mixing valve controller 46 from the temperature, and at the same time, the effective rotation range of the stepping motor 43, that is, rotation beyond that, does not bring the temperature closer to the target temperature. Since the position can be accurately recognized, unnecessary useless rotation load is applied to the stepping motor 43, the valve body 12 and other rotation transmission parts. It is possible to realize a long-life hot and cold water mixing device that can be prevented from being sprayed, and in addition to the characteristics of the mixed hot water temperature change with good linearity by the partition wall 21 and the recognition of the valve disc operating position, a more accurate and stable responsiveness can be obtained. Excellent hot and cold water mixing control is possible. Because temperature deviation and valve body 1
From the current position of 2, the microcomputer of the mixing valve controller 46 performs more advanced control such as learning memory correction such as how many steps in which direction the stepping motor 43 should be rotated. This is because it will be possible.

The drive shaft 3 of the stepping motor 43
The position detector 44 for detecting the rotational position of 6 is configured integrally with the stepping motor 43 by attaching a small permanent magnet to the output stage gear of the reduction gear of the stepping motor 43, attaching a hall element to the substrate at the opposing position. There is.

As described above, according to this embodiment, the housing 14 having the hot water inflow path 15, the water inflow path 16 and the mixing outflow path 17, and the hot water inlet hole rotatably provided in the housing 14 on the side surface. 18 and a water inlet hole 19 and a valve body 12 having an outlet hole 20 on an end face, a partition wall 21 provided between the hot water inlet hole 18 and the water inlet hole 19 of the valve body 12, and the valve body 12 are driven to rotate. The stepping motor 43, the position detector 44 that detects at least one rotational position of the drive shaft 36 of the stepping motor 43, and the detection signal of the position detector 44 are reset to zero, and the number of drive pulses from the stepping motor 43 Position detection circuit 4 for detecting rotational position
5, a mixing temperature detector 33 for detecting the temperature of the mixed hot water downstream of the outlet hole 20, and a temperature setter 38 for setting the temperature of the mixed hot water,
Mixing temperature detector 33, temperature setting device 38, and position detection circuit 4
By providing the mixing valve controller 46 that drives and controls the stepping motor 43 on the basis of the signal from 5, the rotational position of the stepping motor 43 and the valve body 12 can be constantly recognized by the position detector 44 and the position detection circuit 45, and the temperature setting can be performed. From the set temperature of the mixing device 38 and the mixing temperature of the mixing temperature detector 33, the rotation direction of the stepping motor 43 is determined by the mixing valve controller 4
In addition to being immediately instructed by 6, the effective rotation range of the stepping motor 43, that is, the rotation position at which the stepping motor 43 does not approach the target temperature even if it rotates further, can be accurately recognized, so that unnecessary rotation is unnecessary. It is possible to prevent a load from being applied to the stepping motor 43, the valve body 12 and other rotation transmission parts. Further, the partition wall 21 prevents direct flow interference such as blocking one of the flows due to the dynamic pressure of the water flow from the water inlet hole 19 of the valve body 12 and from the hot water inlet hole 18. Therefore, the valve body 12
The linearity of the change in the mixing flow rate of the hot and cold water with respect to the rotation angle is excellent, the valve body 12 can be precisely controlled by the stepping motor 43, and the hot and cold water mixing apparatus can be provided with more stable mixing hot water temperature control and long life.

[0041]

As described in detail above, the mixing valve of the present invention is
A rotatably provided inside the housing, a valve body having a hot water inlet hole provided on a side surface, a water inlet hole, and an outlet hole at an end surface;
By providing a partition wall between the hot water inlet hole and the hot water inlet hole of the valve body, it is possible to directly block either flow by the dynamic pressure of the water flow from the hot water inlet hole or the hot water inlet hole. The flow interference is prevented, the linearity of the change in the mixing ratio of hot and cold water with respect to the rotation angle of the valve body is excellent, and the effect of enabling smooth mixing temperature variation with respect to the rotation angle of the valve body is obtained.

The mixing valve of the present invention has a valve body having a hot water inlet hole rotatably provided in the housing, a water inlet hole provided at the side surface, and an outlet hole at the end face, and hot water of the valve body. By providing a partition wall between the inlet hole and the water inlet hole,
The dynamic pressure of the water flow from the water inlet hole prevents the interference of directly opposing flows that block either flow, and the linearity of the change in the mixing flow rate of the hot and cold water with respect to the rotation angle of the valve body is excellent. The temperature can be varied at almost the same rate of change with respect to the rotation angle of the motor that rotates the valve element, and the effect of facilitating the mixing temperature adjustment by the motor can be obtained.

Further, the hot and cold water mixing apparatus of the present invention includes a housing having a hot water inflow path, a water inflow path, and a mixing outflow path, and a rotatably provided inside the housing having a hot water inlet hole, a water inlet hole, and an end surface. A valve body having an outlet hole, a partition wall provided between the hot water inlet hole and the water inlet hole of the valve body, a motor for rotationally driving the valve body, and a mixed hot water temperature downstream of the outlet hole are detected. By providing a mixing temperature detector, a temperature setting device that sets the temperature of the mixed hot water, and a mixing valve controller that drives the motor by performing a comparison calculation based on the signals from the mixing temperature detector and the temperature setting device, the valve body The dynamic pressure of the water flow from both the water inlet hole and the hot water inlet hole prevents direct flow interference that would block either flow, and the linearity of the change in the mixed flow rate of the hot and cold water with respect to the rotation angle of the valve body is excellent. , The motor rotates the valve body and the rate of change is almost the same for the rotation angle. Smooth the mixing temperature can be varied, the effect of enabling a stable mixed hot water temperature control without hunting or the like in the mixing valve controller.

Further, the hot and cold water mixing apparatus of the present invention receives the pressure of both the housing having the hot water inflow passage, the water inflow passage and the mixing outflow passage and the pressure of the hot water inflow passage and the water inflow passage. Inlet pressure reducing valve that automatically narrows the higher flow path, a valve body that is rotatably provided in the housing and that has a hot water inlet hole and a water inlet hole on the side surface, and an outlet hole on the end surface, and A partition wall provided between the hot water inlet hole and the water inlet hole of the valve body, a motor for rotationally driving the valve body, a mixed temperature detector for detecting the mixed hot water temperature downstream of the outlet hole, and a mixed hot water temperature By setting a temperature setter to set and a mixing valve controller that drives the motor by performing a comparison calculation based on the signals from the mixing temperature detector and the temperature setting device, the inlet side differential pressure reduction valve is used Water inlet hole and hot water inlet even if there is fluctuation in supply pressure or imbalance in supply pressure The respective inlet pressures that act on the valve are close to each other, and there is a direct flow interference that blocks either flow by the partition wall due to the dynamic pressure of the water flow from the water inlet hole of the valve body or from the hot water inlet hole. The linearity of the change of the mixing flow rate of the hot and cold water with respect to the rotation angle of the valve disc is excellent, the valve disc is rotated by the motor, and the mixing temperature can be changed smoothly at almost the same rate of change with respect to the rotation angle. Even if there is a fluctuation in the supply pressure on the side or an imbalance in the supply pressure, there is an effect that stable mixing hot water temperature control is possible.

The hot and cold water mixing apparatus of the present invention has a housing having a hot water inflow path, a water inflow path, and a mixing outflow path, and is rotatably provided in the housing and has a hot water inlet hole, a water inlet hole, and an end surface on the side surface. A valve body having an outlet hole, a partition wall provided between the hot water inlet hole and the water inlet hole of the valve body, a stepping motor that rotationally drives the valve body, and a rotation position of a drive shaft of the stepping motor. A position detector that detects at least one position, a position detection circuit that resets to zero with the detection signal of the position detector and detects the rotational position of the stepping motor based on the number of drive pulses from that position, and the temperature of the mixed hot water downstream of the outlet hole is detected. A mixing temperature detector, a temperature setting device that sets the temperature of the mixed hot water, and a mixing valve controller that drives and controls the stepping motor based on signals from the mixing temperature detector, the temperature setting device, and the position detection circuit are provided. This allows the position detector and the position detection circuit to always recognize the rotational positions of the stepping motor and the valve element, and the mixing valve controller determines the rotation direction of the stepping motor based on the set temperature of the temperature setting device and the mixing temperature of the mixing temperature detector. In addition to being instructed immediately,
Since the effective rotation range of the stepping motor, that is, the rotation position at which it will not approach the target temperature even if it rotates more than that, can be accurately recognized, unnecessary rotation load is applied to the stepping motor, the valve body, and other rotation transmission parts. In addition, the partition wall prevents direct flow interference such as blocking either flow from the water inlet hole of the valve body or the dynamic pressure of the water flow from the hot water inlet hole. The linearity of the change in the mixing flow rate of the hot and cold water with respect to the rotation angle is excellent, the valve body can be precisely controlled to rotate by the stepping motor, and it is possible to obtain a more stable mixing hot water temperature control and to provide a hot and cold water mixing device with a long life.

[Brief description of drawings]

FIG. 1 is a sectional view of a mixing valve showing a first embodiment of the present invention.

FIG. 2 (a) shows a state in which the water inlet hole of the mixing valve is completely closed.
-A sectional view (b) AA sectional view showing a half-open state of the same mixing valve (c) AA sectional view showing a state where the hot water inlet hole 20% and the water inlet hole 80% of the same mixing valve are open (d) ) A sectional view taken along the line AA showing the state in which the hot water inlet hole of the mixing valve is fully closed

FIG. 3 is an exploded perspective view of a valve body of the mixing valve.

FIG. 4 is a flow rate characteristic diagram of the mixing valve.

FIG. 5 is a sectional view of a mixing valve showing a second embodiment of the present invention.

FIG. 6 is a configuration diagram of a hot and cold water mixing apparatus showing a third embodiment of the present invention.

FIG. 7 is a configuration diagram of a hot and cold water mixing apparatus showing a fourth embodiment of the present invention.

FIG. 8 is a configuration diagram of a hot and cold water mixing apparatus showing a fifth embodiment of the present invention.

FIG. 9 is a sectional view of a mixing valve which is a conventional mixing valve.

FIG. 10 is a sectional view of a valve body of the mixing valve.

FIG. 11 is a configuration diagram of a water heater equipped with the mixing valve.

FIG. 12 is a flow rate characteristic diagram of the mixing valve.

[Explanation of symbols]

 11 Mixing valve 12 Valve body 14 Housing 15 Hot water inflow path 16 Water inflow path 17 Mixing outflow path 18 Hot water inlet hole 19 Water inlet hole 20 Outlet hole 21 Partition wall 33 Temperature detector 34 Mixing valve 35 Motor 37 Hot water mixing device 38 Temperature setting 39 Mixing valve controller 40 Hot water mixing device 41 Inflow differential pressure reducing valve 42 Hot water mixing device 43 Stepping motor 44 Position detector 45 Position detection circuit 46 Mixing valve controller

Claims (5)

[Claims] 1. A housing having a hot water inflow path, a water inflow path, and a mixing outflow path, and a valve body rotatably provided in the housing and having a hot water inlet hole, a water inlet hole in a side surface, and an outlet hole in an end surface. And a partition wall between the hot water inlet hole and the water inlet hole of the valve body. 2. A housing having a hot water inflow path, a water inflow path, and a mixing outflow path, and a valve body rotatably provided in the housing and having a hot water inlet hole, a water inlet hole in a side surface, and an outlet hole in an end surface. A partition wall provided between the hot water inlet hole and the water inlet hole of the valve body, a motor for rotationally driving the valve body, and a rotary power transmission unit for transmitting the rotation of the motor to the valve body. Mixed valve. 3. A housing having a hot water inflow path, a water inflow path, and a mixed outflow path, and a valve body rotatably provided in the housing and having a hot water inlet hole, a water inlet hole in a side surface, and an outlet hole in an end surface. A partition wall provided between the hot water inlet hole and the water inlet hole of the valve body, a motor for rotationally driving the valve body, and a mixed temperature detector for detecting the mixed hot water temperature downstream of the outlet hole. A hot and cold water mixing device comprising a temperature setting device for setting a mixed hot water temperature, and a mixing valve controller for driving the motor by performing a comparison calculation based on signals from the mixing temperature detector and the temperature setting device. 4. A housing having a hot water inflow path, a water inflow path, and a mixed outflow path, and a flow path having a higher pressure depending on the pressure difference between the hot water inflow path and the water inflow path. An inflow differential pressure reducing valve that automatically narrows, a valve body that is rotatably provided in the housing, has a hot water inlet hole and a water inlet hole on a side surface, and an outlet hole at an end surface, and a hot water inlet hole of the valve body. And a water inlet hole, a motor for rotating the valve body, a mixing temperature detector for detecting the mixed hot water temperature downstream of the outlet hole, and a temperature setting for setting the mixed hot water temperature. And a mixing valve controller that drives the motor by performing a comparison calculation based on signals from the mixing temperature detector and the temperature setting device. 5. A housing having a hot water inflow path, a water inflow path, and a mixing outflow path, and a valve body rotatably provided in the housing and having a hot water inlet hole, a water inlet hole in a side surface, and an outlet hole in an end surface. And a partition wall provided between the hot water inlet hole and the water inlet hole of the valve body, a stepping motor for rotationally driving the valve body, and a position for detecting at least one rotational position of the output shaft of the stepping motor. A detector, a position detection circuit that resets the detection signal of the position detector to zero and detects the rotational position of the stepping motor by the number of drive pulses from the detector, and a mixing temperature that detects the temperature of the mixed hot water downstream of the outlet hole. A detector, a temperature setting device for setting the temperature of the mixed hot water, and a mixing valve controller for driving and controlling the stepping motor based on signals from the mixing temperature detector, the temperature setting device, and the position detection circuit. Water mixing device.