JP2956400B2 - Hot water mixing control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art FIG.
(For example, Japanese Patent Laid-Open No. 1-312)
No. 279). In FIG. 8, 1 is a hot water flow path, 2 is 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 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 element 4 and the water side valve element 6, and a piston 9 which operates by a pressure difference between the primary pressure PH <b> 1 after decompression of hot water and water and PC <b> 1. I have. Then, even if the pressure of the hot water or the 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 the water and the PC2 are always kept equal. Further, a bias means 10 is provided on the valve shaft 8, and the bias means 10 is connected to an end of the valve shaft 8, and is provided so as to sandwich the bobbin 11 and the coil 12 wound and insulated on the bobbin 11. And the coil 12 is connected to the control unit 1 via a flexible portion 14.
8 is connected.

When a current flows from the control means 18 to the coil 12, the current crosses the magnetic field generated by the permanent magnet 13, so that a bias force is applied to the valve shaft 8 by Fleming's law. For this reason, the automatic pressure adjustment point is shifted by the amount of the bias force. For example, the secondary pressure PH2 and the PC2 of hot water and water are constantly adjusted at a point of 2: 1. As a result, the tapping temperature increases. . Thus, the temperature of the mixed hot water is changed by changing the current to the coil 12. The control means 18 superimposes a minute AC signal when a current flows through the coil 12.
This is to reduce the hysteresis characteristics of the magnetic circuit of the bias means 10 and the sliding resistance at the start of driving. Reference numeral 19 denotes a mixing section of hot water and water. After mixing, the hot water is discharged through a flow rate control opening / closing valve 20. The control means 18 biases the bias means 10 and the flow rate control on / off valve drive means 21 to adjust the temperature so as to match the value of the setting means 17.

[0004]

However, in the above configuration, when the supply water temperature increases, the driving amount of the mixing valve increases, and as a result, the space between the hot water side valve element and the hot water side valve seat is wide,
The space between the water valve body and the water valve seat becomes very narrow. In this state, when a change in the flow rate is requested from the setting means, the gap between the valve body and the valve seat is narrow and the sensitivity of the valve is high. Therefore, operating the flow control valve at a normal speed causes a change in the pressure in the mixing section,
As a result, the temperature of the mixed water greatly changes.

The present invention solves such a conventional problem. If the driving amount of the mixing valve is large, the valve sensitivity is increased. If the flow rate is changed, the speed is changed according to the driving amount of the mixing valve. It is a first object to reduce temperature fluctuations such as the above.

Further, if the set temperature is changed when the valve body and the valve seat are similarly narrow, the valve sensitivity is increased, so that the transient temperature fluctuation is large, and in some cases hunting may occur. . A second object of the present invention is to adjust the change time of the set temperature when the valve sensitivity is high in accordance with the driving amount of the mixing valve.

Similarly, when the driving amount of the mixing valve is large and the valve sensitivity is high, if a normal temperature control is performed, the valve sensitivity becomes high and a hunting state occurs due to a slight disturbance or the like. Sometimes. Third of the present invention
It is an object of the present invention to adjust the control gain according to the driving amount of the mixing valve during normal tapping to reduce the instability due to the increased valve sensitivity.

[0008]

According to the present invention, there is provided a hot and cold water mixing control apparatus comprising: a hot water flow path and a water flow path; a mixing valve for adjusting flow rates of the hot water flow path and the water flow path; A mixing valve driving means for driving the mixing valve, a flow control on / off valve, a flow control on / off valve driving means for driving the flow control on / off valve, and a driving amount of the mixing valve driving means and the flow control on / off valve driving means , A setting unit for setting a flow rate, and a driving amount detecting unit for detecting a driving amount of the mixing valve driving unit, wherein the control unit performs the setting in accordance with a signal from the driving amount detecting unit. And a flow control valve control means for controlling a drive change amount of the flow control valve when the set flow rate is changed from the means.

According to another aspect of the present invention, there is provided a hot water mixing control apparatus comprising: a hot water flow path and a water flow path; a mixing valve for adjusting flow rates of the hot water flow path and the water flow path; Mixing valve driving means for driving a flow control on-off valve,
Flow rate control on / off valve driving means for driving the flow rate control on / off valve; control means for controlling the drive amounts of the mixing valve driving means and the flow rate control on / off valve driving means; and mixed hot water temperature detecting means for detecting mixed hot water temperature Setting means for setting the temperature of the mixed hot water, and driving amount detecting means for detecting a driving amount of the mixing valve driving means, wherein the control means receives a signal from the setting means in accordance with a value of the driving amount detecting means. Mixing valve control means for adjusting the driving change amount of the mixing valve when the set temperature is changed.

In order to further achieve the third object, a hot water mixing control apparatus according to the present invention comprises a hot water flow path and a water flow path, a mixing valve for adjusting flow rates of the hot water flow path and the water flow path, and a mixing valve. , A flow control on / off valve, a flow control on / off valve driving means for driving the flow control on / off valve, and a drive amount of the mixing valve driving means and the flow control on / off valve driving means. Control means for detecting a driving amount of the mixing valve driving means; and a driving amount detecting means for detecting a driving amount of the mixing valve driving means, wherein the control means changes a control coefficient of a driving amount of the mixing valve according to a value of the driving amount detecting means. It has valve control means.

[0011]

According to the present invention, when the flow rate is changed when the driving amount of the mixing valve is large and the sensitivity of the valve is high, the speed of the flow rate change is changed to reduce the fluctuation of the tapping temperature.

Further, when the temperature is changed when the driving amount of the mixing valve is large and the sensitivity of the valve is high, the time of the temperature change is changed according to the driving amount of the mixing valve, and the transient temperature fluctuation is small and stable. Do.

Further, when tapping is continued when the driving amount of the mixing valve is large and the sensitivity of the valve is high, the control coefficient of the mixing valve is adjusted according to the driving amount of the mixing valve to prevent hunting or the like. Hot water stably.

[0014]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a hot and cold water mixing control device, and the same parts as those in FIG. Reference numeral 22 denotes an urging means, which includes the automatic pressure regulating valve 3 and the urging means 2.
2, the mixing valve 23 is formed. Numeral 24 denotes a mixing valve driving means for applying a variable bias force to the mixing valve 23 in opposition to the force of the urging means 22. The mixing valve driving means 24 has a first plunger 25 made of a magnetic material, and a first coil 26 which is waterproof and insulated around the first plunger 25, and the first coil 26 is a control means. 18. The mixed hot water temperature is detected by the mixed hot water temperature detecting means 15.

The flow rate is adjusted downstream of the mixing section 19 by a flow control on-off valve 20. The flow rate control on-off valve 20 is provided with a valve housing 27, a conical flow control valve body 28 for adjusting the flow rate in the valve housing, and a corresponding valve seat 29. The flow control valve element 28 and the primary pressure of the fluid (mixing section 1
9), a diaphragm 30 having a groove as a flexible pressure receiving body is connected between the flow control valve body 28 and the valve casing 27, and the groove 30a is further deepened to control the flow rate. Regardless of the lift amount of the valve body 28, the effective pressure receiving area is configured to always be equal to the diameter of the valve seat 29. The back pressure chamber 31 completely separated from the primary side by the diaphragm 30 and the secondary side of the flow control valve body 28 are:
The communication is established by the communication hole 32. The flow control valve body 28 is
The spring 34 as the urging means 33 causes the valve seat 29
Is urged in the direction of contact. Further, there is a second coil 35 and a pipe 36 having one end face sealed.
The second plunger 37 driven by the amount of current supplied to the coil 35 slides in the pipe 36. The second plunger 37 is configured to interlock with the flow control valve body 28 via a shaft 38. The second coil 35, the pipe 36, and the second plunger 37 use the flow control on-off valve driving means 2.
1 are formed.

In the above configuration, the control means 18 adjusts the flow rate by controlling the amount of current supplied to the second coil 35. To control the flow rate to 0 (stop), the control means 18 controls the flow rate.
When the power supply to the second coil 35 is cut off, the flow control valve body 28 urged by the spring 34 comes into contact with the valve seat 29, and the fluid stops flowing. When the second coil 35 is energized, the second plunger 37 is sucked or pushed out,
Against the urging force of the spring 34, the flow control valve body 28
And the fluid (mixed water) starts to flow. That is,
The control means 18 controls the flow rate by adjusting the flow control valve body 28 to an arbitrary lift amount by changing the amount of current supplied to the second coil 35.

FIG. 2 shows an example of the control means 18. 40 is a mixing valve control means for inputting signals from the mixing hot water temperature detecting means 15 and the setting means 17 to calculate the driving amount of the mixing valve 23, and 41 is a mixing valve driving means (first
The first driving amount setting means 44 for setting the driving amount of the coil 26, the driving amount detecting means 44 for inputting the signal of the first driving amount setting means and detecting the driving amount of the mixing valve 23, the reference numeral 42 A flow control on / off valve control means 43 for inputting a signal of the means 17 and an output of the drive amount detection means 44 to calculate a drive amount of the flow control on / off valve 20, 43 is the flow control on / off valve control means 42
Is a second drive amount setting means for setting the drive amount of the flow rate control on / off valve drive means 21 by the signal of. Next, the operation of the present invention will be described. When temperature control is performed, when a current is passed from the control means 18 to the first coil 26, the first coil 26 made of a magnetic material
Plunger 25 applies a biasing force to valve stem 8 according to Fleming's law. When the bias force and the urging force of the urging means 22 are balanced, the automatic pressure regulating valve 3 is balanced. Therefore, the balance point of the automatic pressure regulating valve 3 can be moved by changing the current flowing through the first coil 26. For example, when the current is small, the force of the urging means 22 is stronger, so that the water-side valve body 6 opens more widely than the hot-water-side valve body 4, and the temperature of the mixed hot water decreases. When the current is increased, the plunger 25 is pushed out in opposition to the force of the urging means 22 to open the hot-water-side valve body 4 and, as a result, the temperature of the mixed hot water is increased.

As described above, the control means 18 inputs the signal of the mixed hot water temperature detecting means 15 and the signal of the setting means 17 so that the mixed valve control means 40 and the first mixing valve control means 40 adjust the mixed hot water temperature to the set temperature. The amount of current flowing through the first coil 26 is varied by the drive amount setting means 41 to adjust the mixing valve 23.

In the case of ordinary tapping, no problem occurs with the above method, but the valve sensitivity of the mixing valve may be increased by the manual force of the first drive amount setting means.
In this case, if a disturbance to the mixing valve such as a normal flow rate change is applied, hunting or the like may occur and the operation may become unstable. The reason will be described with reference to FIG. In FIG. 3, the first
The horizontal axis represents the output of the drive amount setting means 42 as the mixing valve drive amount, and the valve opening degree between the hot-side valve body 4 and the hot-side toilet seat 5 of the mixing valve 23 and the water-side valve body 6 and the water-side toilet seat 7 The vertical axis represents the valve opening between the two. When the water temperature is high in summer or the like, for example, the water temperature rises to about 30 ° C. and the supply hot water temperature is about 80 ° C., the temperature is set to an appropriate temperature.
In order to obtain a mixed hot water temperature of ° C., it is only necessary to mix the hot water a little, and the driving amount of the mixing valve 23 may be small as near the point in FIG. In this case, the opening degree of the hot water side becomes small, and as a result, the valve sensitivity of the mixing valve increases. Similarly, when the water temperature is low and the supply hot water temperature is low, it is sufficient to mix the water a little, and the driving amount of the mixing valve 23 increases as shown in the vicinity of the point c in FIG. In this case, the valve opening on the water side becomes small, and the valve sensitivity as the mixing valve increases. Thus, the valve sensitivity of the mixing valve 23 changes according to the size of the first drive amount setting means. In the state where the valve sensitivity is raised, even a small disturbance reacts very sensitively to the mixing valve 23, so that hunting or the like is generated (normally, mixing is performed near the point b in FIG. 3). .

Therefore, the present invention takes the following measures to prevent the above phenomenon. During normal tapping, the mixing valve control means 40 is driven such that the temperature detected by the mixing water temperature detecting means 15 matches a preset temperature (or a temperature set by the setting means 17; hereinafter, referred to as a set temperature). The first drive amount setting means 41
, The current flowing through the first coil 26 is adjusted. When the water temperature is near the point x in FIG. 4D, the driving amount of the mixing valve is appropriate, and when the valve opening is near the point in FIG. 3B, the valve sensitivity of the mixing valve is not so high and stable.

However, when the water temperature is high and the opening degree on the hot water side is small in summer or the like as shown at the point y in FIG. 4D, the valve sensitivity of the mixing valve increases. In this state, when the setting means 17 instructs to change the set flow rate, when the normal speed, for example, the flow rate control opening / closing valve 20 is operated as shown in FIG. As a result, disturbance has occurred in the mixing valve 23. For this reason, the balance cannot be maintained temporarily, and the temperature of the mixed hot water undergoes a large transient fluctuation as shown in FIG.

For this reason, the flow control on / off valve control means 42 detects the output of the first drive amount setting means 41 by the drive amount detection means 44 and changes the drive change amount of the flow control on / off valve according to the mixing valve drive amount. Thus, the transient fluctuation is reduced. For example, as shown in FIG. 4 (a) a, the control coefficient of the flow control on / off valve is conventionally fixed regardless of the driving amount of the mixing valve, and is changed by the driving amount of the mixing valve as shown in FIG. 4 (a) b. In particular, as described above, the control coefficient of the flow rate control on / off valve is reduced near the high water temperature, the small mixing valve drive amount, and the high valve sensitivity of the hot water side valve body, so that the flow rate is changed slowly. Similarly, the control coefficient of the flow control on-off valve is also reduced in the vicinity where the driving amount is large and the valve sensitivity of the water side valve body is high.

Accordingly, when the water temperature is at the point y in FIG. 4D, the mixing valve drive amount is p. The control coefficient of the flow control on-off valve 20 corresponding to p is q in FIG. 4A, which is lower than the conventional value a. For this reason, when there is an instruction from the setting means 17 to change the set flow rate, FIG.
As shown in y, the change in the driving amount of the flow control on-off valve 20 is small,
It takes time to stabilize at the changed flow rate. When the flow rate is changed slowly, the pressure change in the mixing section 19 does not become steep, and as a result, the disturbance applied to the mixing valve 23 is reduced, and the mixing valve control means 40 can perform control for sufficiently maintaining the hot water temperature. As shown in FIG. 4 (c) y, the transient fluctuation of the mixed hot water temperature is reduced and the mixed hot water is not accompanied by discomfort.

As shown in FIG. 4 (d) z, when the water temperature further rises and the amount of mixing valve failure decreases, the control coefficient of the flow control on / off valve is further reduced. As a result, the time required for changing the flow rate is reduced as shown in FIG. ) It becomes longer like z. However, the stability of the mixed hot water temperature is improved, and the temperature becomes the same as in FIG.

Another embodiment of the present invention will be described with reference to FIGS. In the above embodiment, the same parts as those of the control means in FIG. 2 are denoted by the same reference numerals, detailed description is omitted, and different parts will be mainly described.

FIG. 5 shows an example of the control means 18. Numeral 40 is a mixing valve control means for inputting signals from the mixed hot water temperature detecting means 15 and the setting means 17 and an output from the driving amount detecting means 44 to calculate a driving amount of the mixing valve 23.

Although no problem arises when normal tapping is performed, the valve sensitivity of the mixing valve may be increased by the output of the first drive amount setting means as in the above embodiment.
In this case, if the normal set temperature change is performed, the operation of the mixing valve may become unstable due to hunting or the like.

Therefore, the present invention takes the following measures to prevent the above phenomenon. When the water temperature is near the point x in FIG. 6D, the driving amount of the mixing valve is appropriate, and when the valve opening is near the point in FIG. 3B, the valve sensitivity of the mixing valve is not so high and stable. However, when the water temperature is high in summer or the like and the valve opening on the hot water side is small, as shown at point y in FIG. 6 (d), the valve sensitivity of the mixing valve increases. In this state, if there is an instruction from the setting means 17 to change the mixed hot water temperature, if the set temperature is suddenly changed as shown in FIG. 6B, the temperature deviation will suddenly increase, and the mixing valve drive will be started. The means 40 causes a current to flow through the first coil via the first drive amount setting means 41 so as to operate the mixing valve with a large control amount. As a result, the mixing valve 23 operates sensitively due to sudden operation despite the high valve sensitivity, and the temperature of the mixed hot water undergoes a large transient fluctuation as shown in FIG. 6C. Therefore, the mixing valve control means 40
Represents the output of the first drive amount setting means 41 as the drive amount detection means 4
This transient fluctuation is reduced by changing the number of divisions of the set temperature according to the detected amount and the driving amount of the mixing valve.

For example, in the prior art, the set temperature was immediately set to the value immediately after the change of the set temperature regardless of the drive amount of the mixing valve. However, as shown in FIG. change. The number of divisions of the set temperature in the vicinity where the water temperature is high, the mixing valve drive amount is small, and the valve sensitivity of the hot water side valve body is high is increased, so that the apparent set temperature change is reduced and the temperature change is performed slowly. Similarly, the number of divisions of the set temperature is increased near a region where the driving amount is large and the valve sensitivity of the water-side valve body is high. Therefore, when the water temperature is at point y in FIG.
The driving amount of the mixing valve becomes p. The division number of the set temperature corresponding to p is q in FIG. If q is 3, when the setting means 17 instructs to change the set temperature,
As shown in FIG. 6B, the set temperature is not changed immediately but is divided into three stages. It takes time for the temperature of the mixed hot water to stabilize to the changed temperature as shown in FIG. 6 (c). However, if the temperature is changed slowly, the mixing valve 23 having a high valve sensitivity does not react sensitively and the temperature of the mixed hot water does not change. The steep overshoot and hunting can be suppressed, and the set temperature can be changed with ease and the discomfort is eliminated. When the water temperature further rises and the mixing valve drive amount decreases as shown in FIG. 6 (d) z, the number of divisions of the set temperature is further reduced, and as a result, the time required for changing the flow rate becomes as shown in FIG. 6 (b) z. become longer. However, the stability when the set temperature of the mixed hot water is changed is desired, as shown in FIG. 6C.

FIG. 5 shows another embodiment of the present invention.
This will be described with reference to FIG. Although no problem occurs when normal tapping is performed, the valve sensitivity of the mixing valve may be increased by the output of the first drive amount setting means as in the above embodiment. In this case, if the normal mixing valve control is performed, the mixing valve becomes unstable, and in the worst case, hunting or the like occurs, and the control becomes impossible.

Therefore, the present invention takes the following measures to prevent the above phenomenon. When the water temperature is near the point x in FIG. 7B, the driving amount of the mixing valve is appropriate, and when the valve opening is near the point in FIG. 3B, the valve sensitivity of the mixing valve is not so high and stable. However, when the water temperature is high in summer or the like and the valve opening on the hot water side is small, as shown at point y in FIG. 7B, the valve sensitivity of the mixing valve increases. In this state, the control coefficient of the mixing valve control means 40 is changed in order to maintain the temperature of the mixed hot water stably (for example, in PID control, the proportional coefficient is reduced). For example, as shown in FIG. 7A, the control coefficient of the mixing valve in the related art is constant regardless of the driving amount of the mixing valve.
The value is changed according to the mixing valve drive amount as shown in b. In particular, as described above, the control coefficient of the mixing valve in the vicinity where the water temperature is high, the driving amount of the mixing valve is small, and the valve sensitivity of the hot water side valve body is high is reduced, and
The drive amount of the drive amount setting means 41 is slowly changed. Similarly, the control coefficient of the mixing valve in the vicinity where the driving amount is large and the valve sensitivity of the water side valve body is high is reduced.

When the upstream of the water flow path 2 is exposed to the atmosphere outside the house, the water temperature may be significantly different from that in a normal state because the part is heated by solar heat or cooled by cold air. . Here, a case where the pipe is heated will be described. When the hot water is started, the heated water is
As shown in (b), it flows toward the mixing valve 23 with time. If the supply hot water temperature does not change, the driving amount of the mixing valve will be as shown in FIG.
As shown in (c), as the water temperature increases, the temperature becomes smaller. For this reason, the sensitivity of the water-side valve body is increased, and if the mixing valve control coefficient is constant as in FIG. e)
It gradually becomes hunting like a.

To prevent this, the mixing valve control means 40 detects the output of the first driving amount setting means 41 by the driving amount detecting means 44 and changes the control coefficient of the mixing valve control means 40 according to the mixing valve driving amount. To stabilize the temperature of the mixed water. When the water temperature rises with time as shown in FIG. 7B, the driving amount of the mixing valve becomes smaller as shown in FIG. 7C. In accordance with this, the mixing valve control coefficient is gradually reduced as shown in FIG. As a result, the temperature of the mixed hot water is reduced as shown in FIG.
And a stable temperature can be maintained. As described above, by reducing the valve operation coefficient in the future, the mixing valve 23 having a high valve sensitivity does not react sensitively, the fluctuation of the mixed hot water temperature can be suppressed, and a stable hot water temperature can be obtained comfortably. .

The case where the piping is cooled will be described. When the tapping is started, the cooled water flows toward the mixing valve 23 with time as shown in FIG. If the supply hot water temperature does not change, the driving amount of the mixing valve increases as the water temperature decreases, as shown in FIG. 7 (g). For this reason, the sensitivity of the hot water side valve body increases, and the mixing valve 23 operates sensitively when the mixing valve control coefficient is constant as shown in FIG. i) It gradually becomes hunting like a.

In order to prevent this, when the water temperature falls with time as shown in FIG.
As shown in FIG. In accordance with this, the mixing valve control coefficient is gradually increased as shown in FIG.

As a result, the temperature of the mixed hot water can be maintained at a stable temperature as shown in FIG.

[0037]

As described above, according to the apparatus for controlling mixing of hot and cold water of the present invention, the following effects can be obtained.

(1) By changing the drive change amount of the flow control on-off valve in accordance with the drive amount of the mixing valve, the control coefficient of the flow control on-off valve near the valve sensitivity of the mixing valve is reduced, and the flow rate is changed slowly. To do. As a result, the change in the driving amount of the flow control on-off valve is small, and it takes time until the flow rate to be changed is stabilized. The disturbance becomes small, and the mixing valve control means can perform control for sufficiently maintaining the hot water temperature. Accordingly, the temperature of the mixed hot water has a small transient fluctuation and does not cause any discomfort.

(2) When the set temperature is changed, the apparent set temperature change is reduced by changing the division number of the set temperature according to the driving amount of the mixing valve so that the temperature change is performed slowly. It takes time to stabilize the temperature after the change, but if the temperature is changed slowly, the mixing valve with high valve sensitivity does not react sensitively, and it is possible to suppress the sharp overshoot and hunting of the mixed water temperature, The set temperature can be changed with care and the discomfort disappears.

(3) Further, a control coefficient (for example, a proportional coefficient in PID control) of the mixing valve control means is changed according to the mixing valve driving amount. As a result, the mixing valve having a high valve sensitivity does not react sensitively, and it is possible to suppress the fluctuation of the mixed hot water temperature, and to obtain a comfortable and stable hot water temperature.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a hot and cold water mixing control device of the present invention.

FIG. 2 is a control block diagram of the apparatus.

FIG. 3 is a characteristic diagram of the opening degree of the mixing valve with respect to the driving amount of the mixing valve of the apparatus

FIG. 4 (a) is a diagram showing a relationship between a driving amount of a mixing valve and a flow control on / off valve control coefficient in the same device. FIG. 4 (b) is a diagram showing a relationship between time and a driving amount of a flow regulating on / off valve in the same device. (D) Relationship between water temperature and mixing valve drive amount in the same device

FIG. 5 is a control block diagram of a hot and cold water mixing control device according to a second embodiment of the present invention.

FIG. 6 (a) is a diagram showing a relationship between a driving amount of a mixing valve and a set temperature division in the device. FIG. 6 (b) is a diagram showing a relationship between a time and a set temperature in the device. Figure (d) Relationship between water temperature and mixing valve drive amount in the same device

FIG. 7A is a diagram showing a relationship between a mixing valve control coefficient and a driving amount in a hot water mixing control device according to a third embodiment of the present invention. FIG. 7B is a diagram showing a relationship between time and water temperature in the device. (D) Relationship between time and mixing valve control coefficient in the same device (e) Relationship between time and mixed hot water temperature in the same device (f) Time and water temperature in the same device (G) Relationship between time and mixing valve drive amount in the same device (h) Relationship between water temperature and mixing valve control coefficient in the same device (i) Relationship between water temperature and mixed hot water temperature in the same device Figure

FIG. 8 is a sectional view of a conventional hot and cold water mixing control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot water flow path 2 Water flow path 3 Automatic pressure regulating valve 18 Control means 20 Flow control valve opening / closing valve 24 Mixing valve drive means

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G05D 23/00-23/32

Claims (3)

(57) [Claims] A mixing valve for adjusting a flow rate of the hot water flow path and the water flow path; a mixing valve for driving the mixing valve; a mixing valve driving means for driving the mixing valve; Flow rate adjusting on / off valve driving means for driving an adjusting on / off valve; controlling means for controlling the driving amount of the mixing valve driving means and the flow rate adjusting on / off valve driving means; setting means for setting a flow rate; and the mixing valve driving means The control means adjusts a drive change amount of the flow rate control valve when the set flow rate from the setting means is changed according to a signal of the drive amount detection means. A hot and cold water mixing control device having a flow control valve control means. 2. A hot water flow path and a water flow path, a mixing valve for adjusting a flow rate of the hot water flow path and the water flow path, a mixing valve driving means for driving the mixing valve, a flow control opening / closing valve, Flow rate adjusting on / off valve driving means for driving the adjusting on / off valve, control means for controlling the driving amount of the mixing valve driving means and the flow rate adjusting on / off valve driving means, and mixed hot water temperature detecting means for detecting mixed hot water temperature; Setting means for setting the temperature of the mixed hot water, and driving amount detecting means for detecting a driving amount of the mixing valve driving means, wherein the control means sets a temperature from the setting means in accordance with a value of the driving amount detecting means. A hot and cold water mixing control device having a mixing valve control means for adjusting a driving change amount of the mixing valve when changing the temperature. 3. A hot water flow path and a water flow path, a mixing valve for adjusting a flow rate of the hot water flow path and the water flow path, a mixing valve driving means for driving the mixing valve, a flow control opening / closing valve, Flow rate control on / off valve driving means for driving the control on / off valve; control means for controlling the drive amount of the mixing valve drive means and the flow rate control on / off valve drive means; and drive quantity for detecting the drive amount of the mixing valve drive means A hot and cold water mixing control device having a mixing valve control means for changing a control coefficient of a drive amount of the mixing valve in accordance with a value of the drive amount detection means;