JP2762529B2 - Hot water mixing control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot and cold water mixing control device for adjusting a mixing ratio of hot water and water to obtain an optimum mixed hot water temperature.

2. Description of the Related Art Conventionally, this type of hot and cold water mixing apparatus is as shown in FIG.

In FIG. 3, reference numeral 1 denotes a hot water flow path, 2 denotes a water flow path, and an automatic pressure regulating valve 3 is provided in association with each flow path. The automatic pressure regulating valve 3 includes a hot water side valve body 4 and a hot water side valve seat 5 for reducing the primary pressure PH1 of the hot water flow path 1, a water side valve body 6 for reducing the primary pressure PC1 of the water flow path 2, and a water side. It comprises a valve seat 7, a valve shaft 8 connecting the hot water side valve body 4 and the water side valve body 6, and a piston 9 which operates with a pressure difference between the primary pressure PH <b> 1 and the PC <b> 1 after decompression of hot water and water. Thus, even if the pressure of hot water or water changes suddenly, the automatic pressure regulating valve 3 moves at that pressure, and acts so that the secondary pressure PH2 of the hot water and water and PC2 are always kept equal. The mixing ratio of hot water and water is varied by moving the hot water regulating valve 12 energized by the motor 11 left and right to change the mixing temperature. Reference numeral 13 denotes a mixing portion of hot water and water. After mixing, hot water is discharged through a flow rate control opening / closing valve 14, and its temperature is detected by a mixed hot water temperature detecting means (for example, a thermistor) 15, and its flow rate is detected by a flow rate detecting means 16. The control means 18 energizes the motor 11 and the flow control on-off valve 14 so as to match the value of the setting means 17.

Problems to be Solved by the Invention However, in the above configuration, since the pressure regulating valve 3 and the hot water regulating valve 12 are independent, the shape becomes large, the pressure loss becomes large, and a problem arises when a large flow rate is required. Becomes Further, the response to the temperature change is slow because the hot water regulating valve 12 is energized by the motor.

A first object of the present invention is to solve such a conventional problem. A first object of the present invention is to drive a valve shaft directly by a variable bias means as compared with a motor to quickly adjust a temperature to supply a stable mixed hot water temperature and to stop the tapping. When the signal of the tapping stop detecting means for detecting the tapping indicates the tapping stop state, the supply of the driving force to the variable bias means is stopped, the power consumption is reduced, and the position of the valve shaft at the tapping stop is stored. To set the valve shaft at the time of tapping again to the position at the time of tapping stop. A second object of the present invention is to stop the supply of the driving force to the variable bias means after a lapse of a predetermined time, when the signal of the hot water stop detecting means for detecting the stop of hot water shows that the hot water is stopped. Is to carry out the conversion.

Means for Solving the Problems In order to achieve the first object, a hot water mixing apparatus of the present invention includes a hot water flow path and a water flow path, a hot water side valve body that adjusts flow rates of the hot water flow path and the water flow path, and Controlling the water-side valve body, a valve shaft that opposes the forces of the outlet pressures of the hot-water-side valve body and the water-side valve body to each other, a variable bias unit that applies a variable bais force to the valve shaft, and the variable bias unit. Control means, a valve shaft position detecting means for detecting a position of the valve shaft, and a hot water stop detecting means for detecting a stop of hot water, wherein the control means outputs a signal from the hot water stop state to a hot water stop state. The storage means stores a signal of the valve shaft position detection means, and the main control means outputs a signal for stopping the supply of the driving force to the variable bias means. To set the valve shaft at the valve shaft position is there.

Further, in order to achieve the second object, the hot and cold water mixing control means of the present invention comprises: a hot water flow path and a water flow path; a hot water side valve element and a water side valve element for adjusting a flow rate of the hot water flow path and the water flow path; A valve shaft that opposes the forces due to the outlet pressures of the hot water side valve element and the water side valve element, variable bias means for applying a variable bias force to the valve shaft, control means for controlling the variable bias means, Valve shaft position detecting means for detecting the position of the valve shaft;
A tapping stop detecting means for detecting a tapping stop, wherein the control means, when a signal from the tapping stop detecting means indicates a tapping stop state, a storage means for storing a signal from the valve shaft position detecting means; Timer means; and main control means for outputting a signal for stopping supply of driving force to the variable bias means when the value of the timer means reaches a constant value. The valve shaft is set at the shaft position.

With the above configuration, the supply of the driving force to the mixing valve urging means is stopped by detecting the hot water stop state to save the power of the hot and cold water mixing control device, and the valve shaft position at the time of stop is stored. By doing so, at the time of re-watering, the valve shaft is returned to the position set when it was stopped last time.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of the hot and cold water mixing apparatus, and the same parts as those in FIG. 3 are denoted by the same reference numerals.

Reference numeral 19 denotes an urging unit, and 20 denotes a variable bias unit that applies a variable bias force in opposition to the force of the urging unit 19. The variable bias means 20 includes a plunger 21 made of a magnetic material,
Waterproof and insulated coil around the plunger 21
22. The coil 22 is connected to the control means 18. The flow control on-off valve 14 is driven by a flow control on-off valve driving unit 23. The closed position of the flow control on-off valve 14 is detected by closed position detecting means 24. The position of the valve shaft 8 is detected by the valve shaft position detecting means 25, and the position signal is sent to the control means 18.

FIG. 2 shows an example of the control means 18. 26 is the main control means
27 is an urging amount setting unit, 28 is a storage unit, and 29 is a timer unit.

 Next, the operation of the configuration of the present invention will be described.

When a current flows from the control means 18 to the coil 22, the plunger 21 made of a magnetic material applies a bias force to the valve shaft 8 according to Fleming's law. When the biasing force and the urging force of the urging means 19 are balanced, the automatic pressure regulating valve balances.

Therefore, the balance point of the automatic pressure regulating valve 3 can be moved by changing the current flowing through the coil 22.

For example, when the current is small, the force of the urging means 19 is stronger, so that the water-side valve body 6 opens more than the hot-water-side valve body 4, and the tapping temperature decreases.

When the current is increased, the plunger 21 is pushed out against the force of the urging means 19, so that the hot-water-side valve body 4 opens, and as a result, the hot-water tapping temperature increases.

In this way, the control means 18 adjusts the current flowing through the coil 22 so that the tapping water temperature becomes the set temperature by inputting the signal of the mixed hot water temperature detecting means 15 and the signal of the setting means 17.

The variable bias means 20 driven by an electromagnetic drive can operate faster than a conventional motor-driven valve, and can adjust the temperature quickly and supply a stable mixed hot water temperature.

Further, the operation when stopping tapping will be described. The case where the flow rate detecting means 16 is used as the hot water supply stop detecting means will be described. When tapping is stopped by the setting unit 17 or when tapping is stopped due to interruption of water supply or the like, the main control unit 26 detects a decrease in the flow rate by a signal from the flow rate detection unit 16. When the flow rate is below a certain amount, it becomes difficult to control the temperature of the mixed hot water to the set value, so that the main control means 26
A signal for stopping the supply of the driving force (current) to the coil 22 via the signal 27 is issued. At this time, the driving force (current) to the coil 22
Means for detecting the position of the valve shaft 8 before the supply of oil is stopped
Detected by 25 and stored in the storage means 28. Therefore, the main control means 26 supplies the driving force (current) to the coil 22 via the urging amount setting means 27 so as to return the valve shaft to the position stored in the storage means 28 at the time of re-water supply. Thereby, the supply of the driving force to the coil 22 is stopped after the hot water is stopped, so that the power of the hot and cold water mixing control device can be saved. Furthermore, when the hot water is re-started, the valve shaft is immediately set to the previous position, so that the fluctuation of the hot water temperature immediately after the hot water is reduced and a comfortable hot water can be supplied. Also, when the driving force to the coil 22 is stopped, the valve shaft 8 is pushed by the urging means 11, and the hot-water-side valve body 4 is almost fully opened, so that even if the flow control on-off valve 14 is opened due to malfunction or the like, the tapping water temperature becomes higher than the set temperature. It is safe without becoming. In addition, a flow rate detecting means for detecting a flow rate of the mixed hot water amount as a hot water stop detecting means.
If 16 is used, it is possible to reliably detect the hot water stop state.

Next, the operation when the tapping is stopped using the timer means 29 will be described. The case where the flow rate detecting means 16 is used as the hot water supply stop detecting means will be described. When the tapping is stopped by the setting unit 17 or when tapping is stopped due to water cutoff or the like, the main control unit 26 detects a decrease in the flow rate by a signal from the flow rate detection unit 16. If the flow rate is below a certain amount, it becomes difficult to control the temperature of the mixed hot water to the set value, so the main control means
26 fixes the position of the valve shaft 8 by setting the supply of the driving force to the coil 22 to a constant value via the urging amount setting means 27. Further, a signal is sent to the timer means 29 to start. Timer means 29
Starts, and outputs a signal to the main control means 26 when the value exceeds a certain value. When the signal from the timer means 29 is input, the main control means 26 sends a signal to the urging amount setting means 27 to stop supplying the driving force to the coil 22. At this time, the value of the timer means 29 is reset, and the position of the valve shaft 8 before the supply of the driving force (current) to the coil 22 is stopped is determined by the valve shaft position detecting means 25.
And stored in the storage means 28. Therefore,
The main control means 26 supplies a driving force (current) to the coil 22 via the urging amount setting means 27 so as to return the valve shaft to the position stored in the storage means 28 when the hot water is re-started. Accordingly, the supply of the driving force to the coil 22 is stopped when a certain period of time has elapsed after the stop of tapping, so that the power of the hot and cold water mixing control device can be saved. Furthermore, when the hot water is re-started, the valve shaft is immediately set to the previous position, so that the fluctuation of the hot water temperature immediately after the hot water is reduced and a comfortable hot water can be supplied. When the driving force to the coil 22 is stopped, the valve shaft 8 is pushed by the urging means 11, and the hot-water-side valve body 4 is almost fully closed, so that the tapping temperature is higher than the set temperature even if the flow control on-off valve 14 is opened due to malfunction or the like. It is safe without becoming. If the flow rate detecting means 16 for detecting the flow rate of the mixed hot water is used as the hot water stopping means, the hot water stopped state can be reliably detected.

Next, a case where the urging amount setting means 27 is used as the valve shaft position detecting means will be described. When the main control means 26 issues a signal for stopping the supply of the driving force (current) to the coil 22 via the urging amount setting means 27 when the tapping is stopped, the previously set urging amount is stored in the storage means 28. Remember. Storage means at the time of hot water
The driving force (current) is supplied to the coil 22 using the biasing amount stored in 28. Thereby, the supply of the driving force to the coil 22 is stopped after the hot water is stopped, so that the power of the hot and cold water mixing control device can be saved. Furthermore, when the hot water is re-started, the valve shaft is immediately set to the previous position, so that the fluctuation of the hot water temperature immediately after the hot water is reduced and a comfortable hot water can be supplied. When the driving force to the coil 22 is stopped, the valve shaft 8 is pushed by the urging means 11, and the hot-water-side valve body 4 is almost fully opened, and the flow rate adjusting on / off valve is erroneously operated.
Even if 14 is open, the tapping temperature will not be higher than the set temperature and it is safe.

In each of the above embodiments, the flow rate detecting means 16 is used as the hot water supply stop detecting means. However, the same effect as in the above embodiment can be obtained by using the closing position detecting means 24 or the setting means 17. When the closing position detecting means 24 is used, when the flow control on / off valve 14 is closed, the closing position detecting means 24 causes the main control means.
26 detects stop of hot water. Since the closing position detecting means 24 is used as the hot water stop detecting means, the hot water stopped state can be detected at low cost. When using the setting means 17,
The main control means 26 receives the hot water stop signal from the setting means 17 and detects the hot water stop. Since the setting means 17 is used as the tapping stop detecting means, the tapping stop state can be detected quickly.

In each of the above embodiments, the main control unit 25 detects the stop of hot water as the flow rate detection unit 16 and the closing position detection unit 2.
4. One of the setting means 17 is used, but when two or more of these signals are input and at least one of the signals indicates the stop of tapping, the tapping is stopped and the coil is set in the same manner as in the above embodiment. An operation of stopping the supply of the driving force to 22 may be performed.

Further, if the position of the valve shaft 8 is always transmitted to the main control means via the storage means 28, fine water temperature control can be performed by switching the gain depending on the valve shaft position.

In a normal use condition, the mixing valve 3 operates in the same manner as before when the water pressure fluctuates, and if the pressure receiving areas of the hot water side valve body 4, the water side valve body 6 and the piston 9 are made equal, the secondary pressure PH2 becomes P
C2 maintains the state at the balance point by the urging means 19 and the variable bias means 20.

Further, since the pressure regulating valve and the hot water regulating valve can be integrated into one, the size can be reduced.

Effect of the Invention As described above, the hot water mixing control device of the present invention includes a hot water flow path and a water flow path, a hot water side valve element and a water side valve element for adjusting the flow rates of the hot water flow path and the water flow path, A valve shaft that opposes the force of the outlet pressure of the valve body and the water-side valve body to each other, a variable bias unit that applies a variable bias force to the valve shaft, a control unit that controls the variable bias unit, A valve shaft position detecting means for detecting a position, and a tapping stop detecting means for detecting stop of tapping, wherein the control means is adapted to detect the valve shaft position detecting means when a signal from the tapping stop detecting means indicates a tapping stop state. And main control means for issuing a signal for stopping the supply of the driving force to the variable bias means.When the hot water is re-started, the valve shaft is moved to the valve shaft position stored in the storage means. Variable when detecting hot water stop condition Since the supply of the driving force to the bias means is stopped, power saving of the hot and cold water mixing control device can be achieved. Further, by storing the position of the valve shaft before the supply of the driving force (current) is stopped, the valve shaft is immediately set to the previous position when the hot water is re-started, and the fluctuation of the hot water temperature immediately after the hot water is discharged is reduced, so that it is comfortable. Hot water can be supplied. Further, it is possible to prevent a failure in which heat generation of the variable bias means is suppressed by stopping the supply of the driving force. Further, since the pressure regulating valve and the hot water regulating valve can be integrated into one, the shape can be made small, so that when used in a bathroom, the protruding portion can be made small, which is safe.

Further, the present invention provides a hot water flow path and a water flow path, a hot water side valve element and a water side valve element for adjusting the flow rates of the hot water flow path and the water flow path, and an outlet pressure of the hot water side valve element and the water side valve element. A valve shaft that opposes forces to each other, a variable bias unit that applies a variable bias force to the valve shaft, a control unit that controls the variable bias unit, and a valve shaft position detection unit that detects a position of the valve shaft. A tapping stop detecting means for detecting a tapping stop, wherein the control means stores a signal of the valve shaft position detecting means when a signal of the tapping stop detecting means indicates a tapping stop state, and a timer to start Means, and a main control means for outputting a signal for stopping the supply of the driving force to the variable bias means when the value of the timer means becomes a constant value,
At the time of hot water re-starting, the valve shaft is set to the valve shaft position stored in the storage means, so that the stop of hot water is detected, and after a certain period of time, the supply of the driving force to the variable bias means is stopped, and the hot water mixing control device Power saving can be achieved. Further driving force (current)
By storing the position of the valve shaft before stopping the supply of water, the valve shaft is immediately set to the previous position at the time of hot water supply again,
Fluctuations in hot water temperature immediately after tapping are reduced, and comfortable hot water can be supplied. Further, it is possible to prevent a failure in which heat generation of the variable bias means is suppressed by stopping the supply of the driving force. If the tapping and stopping are repeated in a short time, the processing of the timer means is not completed, and the mixing valve remains at the position where the tapping was stopped. It can supply comfortable hot water.

[Brief description of the drawings]

FIG. 1 is a sectional view of a hot and cold water mixing control apparatus according to one embodiment of the present invention, FIG. 2 is a control block diagram of the hot and cold water mixing control apparatus, and FIG. 3 is a cross sectional view of a conventional hot and cold water mixing control apparatus. 1 hot water flow path, 2 water flow path, 4 hot water side valve element, 6
Water-side valve element, 8 ... valve shaft, 19 ... urging means, 20 ... variable bias means, 15 ... mixed hot water temperature detecting means, 16 ... flow rate detecting means, 17 ... setting means, 18 ... Control means, 24 ... closing position detecting means, 25 ... valve shaft position detecting means.

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hiroaki Yonekubo 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-56-129919 (JP, A) JP-A-61-125533 (JP, A) JP-A-63-153363 (JP, A) JP-A-61-96488 (JP, A A) (58) Field surveyed (Int. Cl. ⁶ , DB name) F16K 31/06 F16K 11/00-11/24

Claims (2)

(57) [Claims] 1. A hot water flow path and a water flow path, a hot water side valve element and a water side valve element for adjusting flow rates of the hot water flow path and the water flow path, and an outlet pressure of the hot water side valve element and the water side valve element. A valve shaft that opposes forces to each other, a variable bias unit that applies a variable bias force to the valve shaft, a control unit that controls the variable bias unit, and a valve shaft position detection unit that detects a position of the valve shaft. Having hot water stop detection means for detecting the stop of hot water,
The main control means includes a storage means for storing a signal from the valve shaft position detection means and a signal for stopping supply of driving force to the variable bias means when a signal from the hot water stop detection means indicates a hot water stop state. Means for setting a valve shaft to a valve shaft position stored in the storage means at the time of re-starting hot water. 2. A hot water flow path and a water flow path, a hot water side valve element and a water side valve element for adjusting a flow rate of the hot water flow path and the water flow path, and an outlet pressure of the hot water side valve element and the water side valve element. A valve shaft that opposes forces to each other, a variable bias unit that applies a variable bias force to the valve shaft, a control unit that controls the variable bias unit, and a valve shaft position detection unit that detects a position of the valve shaft. Having hot water stop detection means for detecting the stop of hot water,
The control means includes a storage means for storing a signal from the valve shaft position detection means when a signal from the hot water stop detection means indicates a hot water stop state, a timer means for starting, and a variable means when the value of the timer means becomes a constant value. A hot-water mixing control device comprising a main control unit for outputting a signal for stopping supply of driving force to the bias unit, and determining a valve shaft at a valve shaft position stored in the storage unit when the hot water is re-started.