JPH03181690A - Hot water/cool water mixing device - Google Patents

Abstract

PURPOSE:To set the opening of a valve port accurately and quickly, and to regulate minutely the mixing ratio of the hot water and the cool water, and the temperature and the flow amount of the mixture water accurately, by providing a mixing valve and a driving part on a straight line, and bringing a driving shaft and a spool in contact with the position on the same vertical line to allow the spool to move linearly. CONSTITUTION:A mixing valve 41 and its driver 26 are arranged on a straight line, and a driving shaft 28 in the driver 26 and a spool 53 of the mixing valve 41 are brought in contact with the position on the same vertical line so as to compose a spool 53 capable of moving linearly. As a result, the movement of the driving shaft 28 can be transmitted to the spool 53 linearly and without receiving any large sliding friction, and the opening degree of a valve port 49 can be set accurately and rapidly. And by operating the spool 53 linearly with no error, the minute adjustment of the mixing ratio of the hot water and the cool water, the temperature and the flow amount of the mixture water, and the like, can be carried out accurately.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement in a hot water mixing device that automatically mixes hot water and cold water to a desired temperature, thereby making it possible to dispense hot water at an appropriate temperature.

[Conventional technology]

2. Description of the Related Art Conventionally, a hot water mixing device is well known in which a hot water valve and a water valve are appropriately adjusted to obtain hot water at a desired temperature. This type of mixing device requires manual operation, so it takes time to produce water at the appropriate temperature, and it is uneconomical because a considerable amount of hot water is unnecessarily drained until the appropriate temperature is obtained. .

For this reason, as an apparatus for automatically mixing hot water and water, for example, wax (heat-sensitive agent) is pre-sealed in a case equipped with a hot water flow path, a cold water flow path, and a mixing water flow path that communicates with both flow paths. a temperature sensing element with a shaft rod that protrudes and retracts from the inlet and exit port due to thermal expansion and contraction of the temperature sensing element; a control valve that maintains the temperature of the mixed water at a set temperature by the operation of the temperature sensing element; and a control valve that moves in a linear direction. Hot water mixing valves with a built-in so-called automatic temperature control function are commercially available, and are equipped with an operation section for setting the temperature of mixed water to be dispensed. This hot water mixing valve is very convenient as it allows you to obtain hot water at the appropriate temperature without having to operate the valve by setting the operating part to the position of the desired hot water output temperature. , the response speed is relatively slow, and as a result, if the temperature of the water is changed frequently, it becomes slow to follow the temperature change, and there is a risk that hot or cold water may be spouted. Sometimes, when trying to use only tap water for cooking, washing, etc., even if the wax shrinks, it is difficult to move the shaft rod to completely follow the shrinkage of the wax. It was difficult to close the valve and there was a risk that hot water would leak out unnecessarily.

[Problems to be solved by the invention]

In order to solve the above-mentioned problems, electronic hot water mixing devices have recently been developed. As this mixing device, for example, as shown in FIG. The mixed water of hot water and water mixed in the shower 7 or faucet is passed through the mixing pipe 6.
7a to discharge water, and a mixed water temperature detection sensor 9 installed in the mixing pipe 6. When hot water is drawn, when the hot water temperature is set with the operation unit 10, the mixed water temperature detection sensor 9 detects the water temperature. The control unit 13 selects the deviation between the detected hot water temperature and the set temperature, sends the selected output signal to the drive unit 11 of the mixing valve device 5, and the drive unit 11 controls the mixing valve device 5. By adjusting and setting the degree of opening and closing of a valve body (not shown), the mixing ratio of hot water and water is adjusted to the outlet temperature set by the operation unit 10, and this mixed water is controlled by a command from the drive unit 12. A hot water mixing device 14 is well known in which water is discharged from the shower 7 or the flush valve 7a through a switching valve device W8 having a discharge channel.

An electric motor is normally used in the drive unit 11.12 that drives the valve bodies of the mixing valve device 5 and the switching valve device 8, and this motor is generally attached to the outside of each valve device 5.8. The flow path is opened and closed by rotating the valve body within the valve device.

However, since the electric motor is installed outside each valve device 5, 8 so that its current-carrying part (e.g., coil) does not come into contact with hot water or water, the valve body in each valve device 5, 8 and the drive The rotating shafts to be connected are fitted into the wall of each valve device 58 via sealing members such as O-rings and gaskets. Therefore, when driving the valve body, in order to prevent water leakage, a sealing member is attached to the rotating shaft under a constant pressure. Since it is necessary to drive the motor with high torque, there is a problem in that an electric motor with a large drive torque is required.

In particular, when finely adjusting the temperature of mixed water based on the mixing ratio of hot water and water, it is difficult to rotate the valve body by a small angle in a short time due to the relationship with the seal pressure, and it is difficult to obtain mixed water at the desired temperature. There was a time-consuming problem.

In addition, the seal member into which the rotating shaft of the electric motor is inserted becomes fatigued due to the sliding friction that occurs each time the rotating shaft rotates, or deteriorates over time due to the cooling and thermal effects of hot water. There was a risk that the watertight function would deteriorate and water leakage would occur.

Furthermore, if a power outage occurs while the hot water mixing device 14 is in use, the electric motor only needs to supply water, not mixed water, because the valve element of the mixing valve device 5 remains at the hot water temperature position. Even in this case, there is a problem in that hot water at the set hot water temperature is discharged, and the hot water in the water heater 1 is used unnecessarily.

In view of the above-mentioned problems, the present invention directly connects the mixing valve section and the driving section that drives the mixing valve section in accordance with the temperature of tapped water, and
By reciprocating and linearly moving the drive shaft of the drive unit to open and close the valve body of the mixing valve with an opening degree that corresponds to the hot water temperature, hot water and water can be mixed quickly and reliably at the desired salinity. The purpose of the present invention is to provide a hot and cold water mixing device.

[Means to solve the problem]

The hot water mixing device of the present invention includes a drive section using a linear solenoid, and a mixing valve section directly attached to the bottom of the drive section in a straight line. A projecting plunger, a guide tube that slides and guides the plunger so that it can move up and down, and a fixed iron core for attracting the plunger that is connected to the lower side of the guide tube via a connecting tube made of a non-magnetic material such as brass. and a coil wound around the outside of the guide tube and the fixed iron core, and the mixing valve section has an inlet for hot water and cold water on one side of the valve body, and an inlet for hot water and cold water on the other side. A mixed water outlet is provided which communicates with each of the hot water and cold water inlets via a mixing chamber in the valve main body, and a mixing chamber is provided in the mixing chamber so as to be in separable contact with a drive shaft passing through the drive unit. A spool that raises and lowers the water is fitted loosely, and this spool has a valve body that opens and closes the hot water inlet side in the mixing chamber relative to the outlet side, and a buffer hole with a cold water flow path drilled inside the valve body under the valve body. A piston is connected to the piston, and a piston is connected between the valve body and the floor surface inside the valve body, and the valve body is pressed toward the drive unit to connect the hot water inlet and mixed water outlet in the mixing chamber. A compression spring is inserted to close the valve port that communicates with the mixing valve part, and a heat insulating material is interposed on the mixing valve part with the drive shaft in contact with the spool, so that the drive part is aligned in a straight line. Since the hot water mixing device was constructed by attaching the hot water mixing device and adding a control device for driving and controlling the driving section, its operation is as follows.

[Function] According to the present invention, when the coil of the drive unit is not energized, the valve body of the mixing valve unit is biased by a compression spring to communicate the hot water inlet side and the mixed water outlet side in the mixing chamber. When the valve port is closed to prevent hot water from flowing out and the coil of the drive unit is energized, the control device controls the current energized to the drive unit in accordance with the hot water temperature, and the energized current is The plunger is moved toward the fixed iron core by a suction force proportional to , and the spool is pushed by the drive shaft within the range of movement of the plunger, and the valve body opens the valve opening to ensure the flow rate of hot water to obtain the hot water temperature. The hot water is opened at the valve opening, the hot water flows into the mixing chamber from the valve port, mixes with the cold water that has already flowed into the mixing chamber, and the mixed water corresponding to the hot water outlet temperature flows out from the mixed water outlet. Mixed water corresponding to the temperature of the hot water can be obtained quickly and easily, and since the drive unit is configured to receive a current corresponding to the hot water temperature according to a command from the control device, this allows the valve opening of the mixing chamber to The degree of opening of the valve can be maintained constant, and when the set value of the hot water temperature is changed, the amount of electricity applied to the drive unit is immediately changed by a command from the control device, and the degree of opening of the valve port is changed.
In order to correct the area so that mixed water of the changed outlet temperature can be obtained and to change the degree of opening of the valve port, a space is provided in the drive part within the range in which the plunger can move so that hot water can flow in. Because of this structure, the pressure inside the drive part and the hot water inlet are the same, and therefore, the plunger can be quickly and reliably moved to a predetermined position with small electric power without requiring a particularly large suction force. As a result, the drive unit has been made smaller and lighter, and in the event of a power outage,
As the suction force of the plunger is eliminated, the plunger immediately returns to its original position and the valve body closes the valve opening by the biasing force of the compression spring, preventing unnecessary outflow of hot water during power outages and discharging only cold water. Since the plunger is immersed in hot water, there is no need for a sealing member to prevent water leakage, which eliminates the problems associated with this, and ensures smooth and good operation of the drive unit consisting of a linear solenoid. The scale is characterized by being able to quickly and easily obtain mixed water at a desired temperature.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 schematically shows the state of use of a hot water mixing device according to the present invention, and the same reference numerals as those shown in FIG. 8 indicate the same parts.

In FIG. 1, 15 is a water supply pipe, which is branched in two directions in the middle of the pipe, and one is connected to the water heater 1 and the other is connected to the hot water mixing device 16, and 17 is a water supply pipe that connects the hot water supply Ia1 and the drought mixing device 16. The connecting hot water supply pipe 18 is a mixing water pipe piped between the outlet side of the hot water mixing device 16 and the cooker 18a, and a mixed water temperature detection sensor (hereinafter referred to as a temperature detection sensor) is installed in the middle of the pipe to detect the temperature of the mixed water. ) 19 is attached, and its detection signal is sent to the control device 20. Also, 21
is a hot water temperature detection sensor installed in the middle of the hot water supply pipe 17 (
(hereinafter referred to as a hot water detection sensor), its detection signal is also sent to the control device 20. In FIG. 1, 22 is a pressure reducing valve, 23 is a safety valve, 24 is a drainage drain, and 25 is a water supply cock.

Next, the structure of the hot water mixing device 16 of the present invention will be explained with reference to FIG.

In FIG. 2, 26 indicates a driving part of the hot water mixing bag M16, and 41 also indicates a mixing valve part of the mixing device 16. When tightened with the tightening bolt 43 (see Figure 4),
They are connected and fixed in a straight line in the direction of the shield.

As shown in FIG. 2, the drive unit 26 of the hot water mixing bag M20 uses a near solenoid that can arbitrarily change the suction force in proportion to the applied current. A plunger 29 with a drive shaft 28 protruding downward that is loosely fitted into the hole 28a via a bearing, a guide cylinder 30 made of a magnetic material that accommodates and guides the plunger 29 in a vertically movable manner, and the guide cylinder 30 and a fixed iron core 27. A connecting tube 31 made of non-magnetic metal such as brass that connects and fixes the two on the same axis, and the center in the height direction on the outside of the guide tube 30 and the fixed iron core 27 is the center in the axial direction of the connecting tube 31. A coil 32 is wound across the two members 30 and 27 in a state where the coil 32 is substantially aligned with the position of the coil 32, a metal case 33 loosely fitted on the outside of the coil 32, and an upper open end of the case 33. A correction core 34, which also serves as a cap of the case 33, is attached using a tightening screw 33a. A through hole 35 for filling the guide tube 30 with hot water is bored in each of the fixed core 27 and the plunger 29 so that the fixed core 27 and the plunger 29 can communicate with each other. Spacers 36 made of non-magnetic metal are interposed between the upper ends of the auxiliary iron cores 34 and the auxiliary iron cores 34, respectively. Furthermore, the guide tube 3
An O-ring 37 is watertightly sandwiched between the upper end of the coil 0 and the case 33 to prevent hot water from leaking to the coil 32 side.

The configuration of the mixing valve section 41 will now be explained with reference to FIG. 2.

The mixing valve section 41 includes a valve main body 47, which has an inlet 44 for hot water and an inlet 45 for cold water on one side, and an outlet 46 from which a mixture of hot water and water flows out on the other side. A mixing chamber 48 is provided in the main body 47 and communicates the inflow port 44, 45 with the outflow port 46, and a mixing chamber 48 whose upper end protrudes toward the fixed core 27 side and comes into contact with the lower end of the drive shaft 28, and which is located in the center of the body. For example, a valve body 50 made of ceramic or hard rubber with excellent heat resistance is fitted to open and close the valve port 49 of the matchmaking chamber 48, and a large-diameter space 51 is bored inside at the lower end to open and close the valve body 50. A buffer piston 52 with small diameter holes a and b opened at the upper and lower ends thereof is screwed onto the spool 53, which is loosely fitted into the mixing chamber 48 so as to be movable together with the drive shaft 28, and a valve body 47. A closing nut 55 having a recessed hole 54 screwed onto the lower open end of the buffer piston 52 and slidingly guiding the lower end of the buffer piston 52 is interposed between the inner end of the closing nut 55 and the valve body 50. A compression spring 56 is inserted to press and bias the valve body 50 in the direction of closing the valve port 49 at all times.
2, the spool 53 is biased by the compression spring 56, and with the valve port 49 closed by the valve body 50, the spool 53 is positioned on the same line as the drive shaft 28. They are designed to touch each other.

In addition, 60 in FIG. 2 is an operating rod for manually operating the spool 53, and has a semicircular locking step 61 at the tip.
The wall of the valve main body 47 is penetrated from the upper side of the mixed water outlet 46 in a watertight manner to project into the mixing chamber 48, and the operating rod 6
When the locking step 61 of 0 is engaged with the engagement recess 62 cut out in a U-shape along the axial direction of the spool 53 and the operating rod 60 is rotated, the spool 53 is moved by the compression spring 56. It is provided so that it can be lowered within the radius of the operating rod 60 against force to manually open the valve port 49.

Next, an overview of the control device 20 that controls the movement range of the plunger 29 of the drive unit 26 will be explained with reference to FIG.

The control device 20 uses a constant voltage 1ifi of class 211, which is obtained by stepping down the commercial power supply 65 to a required voltage, performing full-wave rectification, and making the voltage constant.
A power supply circuit 66 that outputs Vcc and Vdd, a one-chip 4-bit microcomputer (hereinafter referred to as microcomputer) 67, and an input terminal of the microcomputer 67;
A temperature detection sensor 19 connected to the input terminal rz, a volume 69 for setting hot water temperature connected to the input terminal rz via the A/D converter 68, a hot water detection sensor 21 connected to the input terminal ■,
An emergency cutoff circuit 70 connected to the output terminal 01 of the microcomputer 67, a current detection circuit 72 connected to the output terminal O2 via a DC voltage variable circuit 71, and a current detection circuit 72 connected to the output terminal O3 and connected to the DC voltage variable circuit 71. Current limiting circuit 73, output terminal 0. D/A converter 74 connected to output terminal 0.
and an operation display section 75 connected to.

Then, a constant voltage power supply V output from one side of the power supply circuit 66
cc is supplied to the coil 32 of the linear solenoid constituting the drive unit 26 via the emergency cutoff circuit 70 → DC voltage variable circuit 71 → current detection circuit 72, and is supplied to the other constant voltage power supply Vd.
d connects each sensor 19, 21 and connects the microcomputer 67, A/
The power is supplied to each of the D-D/A converters 6B and 14° and each of the circuits as an operating power source.

Note that the DC voltage variable circuit 72 is connected to the coil 32 of the drive section 26.
The D/A converter 74 converts the number of digital steps output from the microcomputer 67 into an analog value and outputs the signal corresponding to the current supplied to the microcomputer 67 from the input terminal IS to the microcomputer 67. 67.

The microcomputer 67 has a program set in a ROM or the like as outlined below.

(1) A function to compare the temperature detection signal (il pressure value) of the mixed water detected by the temperature detection sensor 19 and the value converted to an analog value by the D/A converter 74 and input to the microcomputer 67 (2) Function (3) Comparing the number of digital steps compared with the set value of the hot water temperature (digital value input from the volume 69 to the A/D converter 68 to the microcomputer 67) Function (4) to output an output signal corresponding to the comparison value based on the result to the variable DC voltage circuit 71. A function (4) to output the output signal corresponding to the comparison value based on the result to the variable DC voltage circuit 71. Compare the set value with the current control circuit-73.
(5) A function of outputting a command so that the current supplied to the coil 32 becomes constant ), the function (6) outputs an output signal corresponding to the drop to the current limiting circuit 73.
) When the temperature of the mixed water is detected by the temperature detection sensor 19 to be higher than the set hot water temperature, for example, about 10% over the set temperature, it is determined that there is an abnormality, a stop signal is output to the cutoff circuit 70, and the DC voltage variable circuit is Function to stop current supply to 71 (7) A function to display the operating state of hot water mixing device 16, etc. are programmed.

In addition, in FIGS. 1 and 7, 76 is the control device 20.
The power switch 77 is a display scale for setting the hot water temperature provided in the control device f20.

Next, the operation will be explained.

When using the hot water mixing device 16, at the same time as turning on the power switch 76 of the control device 20, the volume 69 is operated to set the outlet temperature of the mixed water dispensed from the hot water input ring 18a to a desired temperature position on the display scale 77. do. When the collar 18a is opened in this state, the water remaining in the mixing wood pipe 18 is spouted out. Further, the operation display section 75 lights up to indicate that the control device 20 is in the operating state.

However, when the power switch 76 is turned on, the temperature detection sensor 19 provided in the mixing water pipe 18 detects the water temperature in the mixing water pipe 18 and sends the detection signal to the microcomputer 67. The microcomputer 67 compares the value of the detection signal with the analog value input from the D/A converter 74, further compares the resulting digital step number with the set value of the hot water temperature, and outputs an output based on the comparison result. The signal is output to the DC voltage variable circuit 71. That is, the water temperature in the mixing water pipe 18 is set to about 20°C, and the hot water temperature is set to about 4°C, which is suitable for washing hair, for example.
When set to 0°C, the water temperature in the mixing water pipe 18 is
It is necessary to raise the temperature by 0° C. Therefore, the output gaO of the microcomputer 67 sequentially outputs a command signal to the DC voltage variable circuit 71 to increase the voltage. Therefore, the voltage value of the DC voltage variable circuit 71 gradually increases, and the current detection circuit 72
i fi (if! is increased sequentially to drive unit 2
The coil 32 of No. 6 is energized.

When the coil 32 is energized, as shown in FIG.
Due to the magnetic flux (solid arrow) flowing through the plunger 29
is gradually attracted to the fixed iron core 27 side as shown by the dashed line. In this case, the reason why the plunger 29 is not rapidly attracted toward the fixed core 27 by energizing the coil 32 is that the auxiliary core 34, which also serves as a cap for the case 33, is provided above the plunger 29. That is, as described above, the magnetic flux generated by energizing the coil 32 flows from the guide tube 30 to the plunger 29, and the magnetic flux flowing through the plunger 29 is divided into the fixed iron core 27 side and the auxiliary iron core 34 side. Therefore, when the plunger 29 is attracted to the fixed core 27 side, it is when the attraction force acting on the auxiliary core 34 side is overcome, and as long as the force to attract the plunger 29 is also acting on the auxiliary core 34 side. , the plunger 29 is not quickly attracted to the fixed iron core 27 side.

Further, in the present invention, in order to cause the suction force acting on the plunger 29 to act slightly stronger on the fixed iron core 27 side than on the auxiliary iron core 34 side, the lower end of the plunger 29 before the plunger 29 operates and the fixed iron core 27 The gap G formed between the coil 32 and the upper end surface is set at a substantially intermediate position between the center of the coil 32 in the height direction and the lower end of the coil 32. Therefore, when the coil 32 is energized, the plunger 29 completely removes the attraction force on the auxiliary iron core 34 side, and moves toward the fixed iron core 27 side by an attraction force proportional to the energized current.

When the plunger 29 moves toward the fixed core 27, the drive shaft 2B also descends at the same time, pushing down the spool 53 loosely fitted into the mixing chamber 48 of the valve body 47 against the force of the compression spring 56. For this reason, the valve body 50 fitted on the spool 53
drops downward to open the valve port 49. When the valve port 49 is opened, the hot water flowing from the hot water supply jlIil through the hot water supply pipe 17 → the hot water inlet 44 from the upper part of the valve port 49 of the mixing chamber 48 into the cavity in the drive unit 26 flows into the space below the valve port 49. side mixing chamber 4
8, mixed with the cold water already flowing into the mixing chamber 48, and discharged as mixed water from the drain 18a through the mixing water pipe 18 from the mixed water outlet 46 of the valve main body 47. The temperature of the mixed water flowing into the mixing water pipe 18 from the valve main body 47 is detected by the temperature detection sensor 19, and the detection signal is inputted to the microcomputer 67 manually. If the temperature of the mixed water has not reached the set temperature, the microcomputer 67 compares the value of the detection signal with the set temperature value, and outputs the mixed water from the output terminal 02 of the microcomputer 67 to the DC voltage variable circuit 71. Command signals are sequentially output to further increase the voltage corresponding to the difference between the temperature of 1 and the set temperature.
The current value applied to 2 is increased. As a result, the plunger 29 is further attracted (moved) toward the fixed core 27,
The spool 53 is pushed down by the drive shaft 28 to widen the opening of the valve port 49 and increase the flow rate of hot water flowing into the mixing chamber 4B. Therefore, the mixing ratio of hot water to cold water increases, and the outlet temperature of the mixed water is gradually increased.

When the temperature of the mixed water flowing through the mixing water pipe 18 reaches the preset hot water temperature, a detection signal of the current value to be energized to the coil 32 of the drive section 26 is input from the current detection circuit 72 to the input terminal (4) of the microcomputer 67. be done. Therefore, based on the input signal, the microcomputer 67 outputs a command signal from its output terminal O1 to the current limiting circuit 73 to maintain a constant current flowing through the coil 32, and thereby, the DC voltage variable circuit 71 The voltage applied to 32 is held constant. Therefore, the current necessary to maintain the set temperature is supplied to the coil 32, and the degree of opening of the valve port 49 is kept constant.In other words, the current flowing to the coil 32 is controlled at a constant current, so that the amount of hot water flowing through the coil 32 is kept constant. As a result, a mixture of hot water and water at a set temperature is discharged from the collar 18a.

Note that when the amount of hot water output from the water heater 1 increases and the temperature of the hot water flowing into the mixing valve section 41 drops below the set value (approximately 85°C), the hot water detection sensor 21 detects the dropped temperature and detects the drop. The detection signal is sent to the human power @I of the microcomputer 67. Based on the drop detection signal, the microcomputer 67 sequentially sends output signals corresponding to the temperature drop from its output terminal O1 to the current limiting circuit 73, and sends a command to direct current to increase the voltage applied to the coil 32 of the drive unit 26. The voltage is sent to the variable voltage circuit 71, and the voltage applied to the coil 32 is increased until the temperature of the mixed water can be maintained at the set temperature. As a result, the current value flowing through the coil 32 increases, causing the plunger 29 to be further attracted to the fixed iron core 27 side and pushing down the spool 53 as shown in FIG. Machine 1
The amount of water flowing from the pump is increased to maintain the outlet temperature of the mixed water at the set temperature.

Next, the plunger 29 of the drive unit 26 is attracted to the fixed iron core 27 side by the current value applied to the coil 32,
When trying to return to the original position, the empty space inside the drive unit 26 is filled with
Since the hot water is flowing through the fixed iron core 27 and the through hole 35 provided in the plunger 29, the pressure in the cavity of the drive section 26 and the hot water supply pipe 17 are the same, so the plunger 29 is connected to the coil. The movement accompanying the increase/decrease in the bow suction force when the current applied to the bow 32 is varied can be smoothly and reliably performed with a small amount of electric power, since there is no resistance caused by a pressure difference.

Further, since the spool 53 that moves together with the movement of the plunger 29 is attached with a buffer piston 52 having a hollow space 51 inside, when the spool 53 descends, the buffer piston 52 becomes empty. Since the water flowing into the hole 51 and the concave hole 54 of the closing nut 55 slowly descends while being discharged into the mixing chamber 48 from the small diameter holes a and b, the rapid descent of the spool 53 This is suppressed by the slowing of the descending speed caused by the damping piston 52 discharging water from the cavity 51 and the resulting damping effect. Therefore, a chattering phenomenon occurs due to the synergistic effect of the waving phenomenon caused by the rapid descent of the spool 53 and the biasing force of the compression spring 56 (the spool 53
The phenomenon of rocking movement within the valve port 49 can be reliably prevented.
By accurately maintaining the opening degree at a predetermined setting value, it becomes possible to maintain the flow rate of hot water at a fixed constant at all times.

Furthermore, when checking the flow rate of hot water when the hot water mixing device 16 is first used, or when mixed water is required in the event of a power outage, the operating rod 60 can be manually rotated in the direction in which the spool 53 descends. , the engagement recess 6 of the spool 53 is secured by the semicircular locking step 61 at the tip of the operating rod 60.
Since the lower end edge of 2 is pushed downward and the spool 53 is pushed down against the force of the compression spring 56, the hot water mixing device 16 of the present invention can continue to supply hot water even during power outages. The hot water inside the machine 1 can be easily used.

Furthermore, when the power switch 76 is turned off, the power supply to the coil 32 of the drive section 26 is cut off, so that the attraction force of the plunger 29 toward the fixed iron core 27 is eliminated. Then, the compression spring 56 that is constantly biasing the spool 53 in the upward direction
The force causes the spool 53 to be pushed up to a position where the valve body 50 closes the valve port 49, thereby closing the valve port 49 and pushing the plunger 29 back to its original position. As a result, hot water does not come out due to the closure of the valve port 49, and only cold water can be used. This is very convenient, as it allows you to use only cold water during times when you don't need much hot water, such as in the summer, and avoid wasting the use of hot water.
There is an advantage that the water heater can be used efficiently.

In addition, in the present invention, when dispensing the mixed water, the power switch 76 is turned off.
Although the embodiment has been described in which mixed water is obtained by inputting
The hot water mixing device 16 may be used by setting only the outlet temperature of the mixed water. In this case, the mixing water pipe 18 retains mixed water at a temperature close to the temperature set on the display scale 77. There is an advantage that mixed water at a desired temperature can be obtained relatively quickly.

Further, although an example has been described in which the driving section 26 made of a linear solenoid of the present invention is attached to the upper part of the mixing valve section 41, the driving section 26 is attached to the lower side of the mixing valve section 41, and cold water is constantly flowed into the coil 32. This also applies to a structure designed to cool the air.

〔Effect of the invention〕

As explained above, in the hot water mixing device of the present invention, the mixing valve section and its driving section are arranged in a straight line, and the drive shaft in the driving section and the spool of the mixing valve section are positioned on the same vertical line. Since the spool is configured to move in a straight line while being in contact with each other, the movement of the drive shaft can be directly transmitted to the spool without being subjected to large sliding friction, and the opening degree of the valve port can be adjusted accurately and quickly. Can be set to .

Furthermore, by operating the spool linearly without error, it becomes possible to accurately adjust the mixing ratio of hot water and water, the temperature and flow rate of the mixed water, etc.

Furthermore, in the event of a power outage or when the power to the drive unit is cut off, the suction force of the plunger disappears, the spool automatically returns to its original position, and the valve port can be closed, reducing the waste of hot water in the water heater. It is possible to avoid unnecessary use.

Furthermore, since the mixing valve section is equipped with an operating rod for manually lowering the spool, a mixture of hot water and water can be easily obtained as needed during power outages.

Furthermore, when the spool is lowered, there is a buffer piston attached to its lower end, so although the spool moves in a straight line,
The shock-absorbing piston suppresses rapid movement and allows movement within a minute range.This allows the opening degree of the valve port to be set accurately, ensuring that hot water and water are mixed reliably and the mixed water at the set temperature is maintained. can be obtained quickly and easily.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram showing an embodiment of the hot water mixing device of the present invention, Fig. 2 is a front view showing a longitudinal section of the hot water mixing device of the present invention, and Fig. 3 shows the operating state of the hot water mixing device. 4 is a plan view, FIG. 5 is a sectional view taken along line A-A in FIG. 2, FIG. 6 is an explanatory diagram showing the flow of magnetic flux, and FIG. The block diagram shown in FIG. 8 shows the configuration of an embodiment of a conventional hot water mixing device. 16. Hot water mixing device W 26. Drive section 29. Plunger 2. Coil 41. Mixing valve section 47 Valve body section 48. Mixing chamber 49 Valve port 50. Valve body 5211 Impact piston 53. Spool 6
0・Operation rod 61・Locking step 62・Engagement recess

Claims (3)

[Claims] (1) Inside the valve body, an inlet for hot water and an inlet for cold water are individually opened on one side, and an outlet for mixed hot water and water is opened on the other side. A mixing chamber is formed which communicates with the outflow port, and within this mixing chamber, a valve port is provided approximately in the center of the mixing chamber, and a spool equipped with a valve body that freely opens and closes the valve port is mounted using a compression spring. The mixing valve is configured by fitting the valve body loosely so that it can move up and down with the valve body biased toward the valve port side, and a plunger at a position on the vertical line of the spool that changes the suction force of the plunger in proportion to the energized current. A hot water mixing device, characterized in that the driving portion for causing the mixing of hot water and water is attached to the mixing valve portion by bringing the driving shaft protruding from the plunger into contact with the spool at a position on the same vertical line. (2) A U-shaped engagement recess is formed in the center of the body of the spool, and an operating rod with a semicircular locking step formed at a position corresponding to the engagement recess is connected to the mixing valve part. The spool is movably and watertightly inserted through the spool to engage the locking step and the mixing recess, and the spool is manually lowered by the operating lever within the radius dimension of the operating lever. Claim 1
The hot water mixing device described. (3) The low-speed mixing device according to claim 1, characterized in that a buffer piston is connected to the lower end of the spool, the buffer piston having a hollow space inside to allow the passage of hot water/water.