JP2577403B2 - Hot water mixing equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water mixing apparatus for obtaining hot water at a desired temperature by appropriately adjusting the amount of hot water supplied and the amount of supplied water. Related to improvement of control unit.

(Prior Art) A hot water mixing apparatus for obtaining hot water at a desired temperature by adjusting the amount of hot water passing through a hot water valve and the amount of water passing through a water valve is well known. Some of this type of hot water mixing apparatus can stop hot water supply by operating a flow control valve based on a hot water supply stop command. For example, there is a type in which this type of mechanism is provided to a wash basin or a shower basin.In general, for the purpose of temporarily stopping hot water supply, the operation mechanism is provided with a one-stop button, a one-stop knob, or the like. Calling.

In such a device, even if the hot water supply is stopped once, the temperature control system is operating in preparation for the hot water supply again, and thus such a one-stop state has been maintained for a certain period of time or more, and the temperature of the hot water near the hot water supply port has dropped. In this case, the temperature control system shifts the hot and cold water mixing valve to the high temperature side in order to recover the set temperature following the temperature decrease. Therefore, if such control is performed, hot water having an abnormally high temperature may be supplied when hot water is supplied again, and a dangerous case such as burns may occur.

Therefore, in order to solve such a problem, there has been a configuration in which the driving of the hot water mixing device by the temperature control system is stopped when the hot water supply is temporarily stopped, as disclosed in Japanese Patent Publication No. 62-31232, for example.

(Problems to be Solved by the Invention) However, even in the conventional technique, when the set temperature at the time of the previous hot water supply is higher than the desired hot water supply temperature at the time of re-hot water supply, etc. If hot water supply is restarted carelessly without any change, unexpectedly high-temperature hot water will be discharged, which is still dangerous.

In view of the above, an object of the present invention is to provide a hot and cold water mixing apparatus with high safety by making sure that hot water of an appropriate temperature that is not so high is always discharged at the time of restarting hot water supply and then supplying hot water at a set temperature. I do.

(Means and Actions for Solving the Problems) In order to solve the above problems, the present invention relates to a hot water mixing valve for mixing hot water from a water heater and water to adjust the hot water temperature, and a hot water mixing valve. A flow control valve for adjusting the hot water supply amount obtained by the above, a temperature detecting means for detecting the temperature of the hot water mixed by the hot water mixing valve, and a temperature for setting a desired hot water supply temperature obtained through the hot water mixing valve. A setter, operating means for instructing start or stop of the hot water supply, and drive control of the hot and cold water mixing valve to adjust the hot water supply temperature to the set temperature of the temperature setter based on an output of the temperature detecting means; A hot water mixing apparatus comprising: a control unit that controls opening and closing of the flow control valve in response to a hot water supply start or stop command by the operating means. The control unit includes: an opening position of the mixing valve. And a position memory for storing predetermined opening position data. When the hot water supply is stopped by the operating means, the opening position of the mixing valve is compared with the predetermined opening position data and Is closed or the water side is opened, a command is issued to continue the drive control with the drive speed of the mixing valve low, and the opening position of the mixing valve is set to the predetermined opening position. When compared with the data, the valve is provided with a valve control determining means for issuing a command to stop the drive control when it is at the opening position for opening the hot water side or closing the water side. At the time of hot water supply after the top, when the set temperature of the setter is below the predetermined temperature, safe hot water of the set temperature is always discharged, but even when the set temperature is not below the predetermined temperature, That the highest temperature higher than the hot water belonging to the 囲内 is discharged is excellent in without safety. Also, when the hot water supply is started and stopped frequently, the control does not necessarily have to be stopped each time, and excellent responsiveness can be achieved.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In each drawing, the same reference numeral indicates the same object.

FIG. 1 is a system diagram of a hot water mixing apparatus according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a hot / cold water mixing valve for interlocking a hot water supply valve 1a and a hot water supply valve 1b by a motor or the like or driving the respective valves to adjust an opening position so as to obtain a desired hot water temperature. Mixing pipe for sending hot water mixed in the above, 3 is a flow control valve which is opened and closed to supply hot water of a desired flow rate, 4 is temperature detecting means having a thermistor 4a provided in the middle of the mixing pipe 2, and 5 is hot water supply Means for starting / stopping the operation, 6 is a position detecting means such as a step motor for detecting the opening position of the hot water mixing valve 1 (also serving as a driving motor for the hot water mixing valve 1), and 7 is an opening of the flow regulating valve 3. Flow control valve position detecting means for detecting a degree position, temperature setting means 8 for setting a desired hot water supply temperature, 9 to 13 each being a valve control determining means which is a component of a control unit, flow control valve Motion means, mixing valve 1
, A position memory for storing the predetermined start position, valve speed calculating means, and valve driving means. Hereinafter, these configurations will be described focusing on the control unit.

Firstly, the valve control determining means 9 compares the output signals of the temperature detecting means 4 and the temperature setting means 8 during hot water supply based on a hot water supply command from the operating means 5 and the output signal of the temperature setting means 8 to determine the hot water supply temperature T. Is controlled to approach the set temperature Ts. Secondly, when the operation of the hot water supply is stopped by the operation of the operating means 5, the driving of the mixing valve 1 by the valve driving means 13 via the valve speed calculating means 12 is reduced and the flow control valve is controlled. The flow control valve 3 is closed while the output signal of the flow control valve position detecting means 7 is monitored by the driving means 14, and the following control is performed.

First, the output signal P of the position detecting means 6 is compared with the position data PM of the position memory 11, and the detected signal P is compared with the position data PM.
If the value is equal to or less than the value, the temperature control as the first control described above is performed while the driving speed of the mixing valve 1 is kept low.

Here, the value of the position data PM is an output value of the position detecting means 6 corresponding to the opening position at which the mixing valve forms hot water at a predetermined temperature, and at the opening position corresponding to a value larger than this value PM, 1 forms hot water at a temperature higher than a predetermined temperature. Accordingly, the above-described temperature control at a low speed is executed when the detected temperature is equal to or lower than the predetermined temperature.

On the other hand, when the detection signal P is larger than the value of the position data PM, the driving of the mixing valve 1 is stopped. At this time, the stop position of the mixing valve 1 may be, for example, a position for forming hot water having an appropriate temperature that is neither too cold nor too hot below the predetermined temperature.

The valve speed calculating means 12 calculates the opening / closing speed of the valve based on the type of the output signal of the valve control determining means 9. For example, in the above-described first control, normal opening / closing control is executed, and in the second control, when the above-described temperature control is continued, the speed is low. Command to move at speed. Such a valve speed calculating means 12 can be constituted by, for example, a table memory in which various patterns of the valve opening / closing speed are stored. Can be read.

The mixing valve driving means 12 includes a valve control reverse means 9.
In order to form a drive signal for controlling the opening and closing of the hot and cold water mixing valve 1 according to the control method determined by the control method and the calculation speed determined by the valve speed calculation means 12. For example, a signal for determining the rotation direction of the motor and the motor control PW for
Form an M signal, etc.

Hereinafter, the operation of the embodiment from stop of hot water supply to re-hot water supply according to the present invention will be described with reference to the flowchart of FIG. In the following description, the numbers (20) to (29) correspond to the respective block numbers in the flowchart. Also, (22
Codes such as (Y) and (22N) are in the decision block (22).
Are positive and negative, respectively.

First, when a command to stop hot water supply is input by operating the operating means 5, the valve control determining means 9 lowers the driving speed of the hot and cold water mixing valve 1 via the valve speed calculating means 12 and the valve driving means 13 (20), The flow control valve 3 is closed by the flow control valve driving means 14 (21). Thereafter, the position data PM of the position memory 10 and the detected position P from the position detecting means 6 are read (22) and (23), respectively, and whether the detected position P is smaller than the position data PM, that is, whether P <PM is satisfied or not. Is determined (24), and if the condition is satisfied (24Y), temperature control is performed so that the hot water forming temperature of the hot / water mixing valve 1 becomes the temperature set in the temperature setting means 8 (25). . Of course, in this case, the driving speed of the valve is low at the step S20.

Then, it is determined whether the hot water supply has been resumed (2.
6) If it has been stopped before (26N), the process returns to step 22, while if hot water supply is resumed (26Y), the flow regulating valve 3 is opened (27) and the process returns to the normal temperature control routine (28). .

On the other hand, if the detected position T is not smaller than the position data PM in the step 24 (24N), the hot water mixing valve 1 is driven to the opening position for forming hot water of an appropriate temperature as described above (29), Stop the drive control (3
0). Then, it is determined whether or not the hot water supply has been resumed (31). If the hot water was previously stopped, the process waits (31N).
When the hot water supply is restarted (31Y), the flow control valve 3 is opened (27), and the process returns to the temperature control routine (28).

FIG. 3 is a sectional front view showing a hot water mixing valve according to the present invention, and the hot water mixing valve will be described below.

The hot and cold water mixing valve 1 is housed inside the box A,
This is installed at a location convenient for supplying hot water to a bathroom or a kitchen, for example.

On the left and right ends of the hot and cold water mixing valve, a short pipe is set up and the inside thereof is formed as a water inflow section 30 and a hot water inflow section 31, respectively. The water inflow section 30 is provided with a water supply pipe 30a and the hot water inflow section 31 is provided with a water heater or the like. The hot water supply pipes 31a to be connected to each other are connected.

At the upper and lower ends of the hot water mixing valve 1, a mixing valve body 32 and a switching valve body 33 are coaxially arranged, respectively.
The flow path switching to the outflow portion 34 and the second outflow portion 35 is performed by the switching valve body 5.

The mixing valve body 32 has a cylindrical shape with an open lower end, has a water inlet hole 32a on the upper side and a hot water inlet hole 32b on the lower side, and has a spindle 32c protruding at the upper end while passing through the inside at the lower end. A rectifier 32d for rectifying mixed water of water and hot water is provided. Further, the water inflow chamber 36 and the hot water inflow chamber 37 communicating with the flow passages from the water inflow section 30 and the hot water inflow section 31 correspond to the water inflow holes 32a and the hot water inflow holes 32b, respectively, on the left and right sides of the hot and cold water mixing valve 1. Is formed.

The center of the opening of the water inflow hole 32a and the hot water inflow hole 32b is set at a position separated by a predetermined angle with respect to the axis of the mixing valve body 32. Therefore, when the mixing valve body 32 is rotated, Hole 32
a and the hot water inflow hole 32b have different valve opening degrees.
An operation of mixing the hot water and the water can be performed by communicating with the hot water and the hot water inflow portion 31. In addition, the sizes of the water inflow holes 32a and the hot water inflow holes 32b so that both the water and the hot water from the water inflow portion 30 and the hot water inflow portion 31 can be completely closed, and the positional relationship therebetween are provided. Then, when the mixing valve body 32 is rotated from the time when the mixing valve body 32 is completely shut off, mixing of water and hot water is performed, and when only water is supplied, only the water inflow hole 32a is fully opened or When supplying only hot water, only hot water inflow hole 32b can be fully opened.

Similarly, the switching valve body 33 has a cylindrical shape whose upper end is open, and has a mixed water outflow hole 33a formed on a peripheral wall thereof, and further has a spindle 33b provided at a lower end thereof. And this switching valve body 3
The first outflow portion 34 and the second outflow portion 3
5 are provided with a first outflow chamber 34a and a second outflow chamber 35a, respectively.

The mixing valve body 32 and the switching valve body 33 are coaxially arranged, and the rotation of the mixing valve body 32 and the switching valve body 33 switches the mixing and flow rate of hot water and water, and further switches the flow path to the first and second outflow portions 34 and 35. And
Electric motors 12a and 40 for rotating the mixing valve body 32 and the switching valve body 33 are arranged, respectively, and the rotation of the output shaft is transmitted to the spindles 32c and 33b via the reduction gears 11a and 12a.

A communication flow path 41 is formed between the mixing valve body 32 and the switching valve body 33 so as to have a flow path axis coinciding with the axis of these valve bodies. Further, an impeller type flow rate detecting device 42 which rotates by the flow of water is provided on the upper side of the communication flow path 41, and a temperature sensor 4 serving as temperature detecting means for detecting the temperature of the mixed water is provided on the lower side. Is arranged.

Here, the degree of mixing of the hot water and the water is determined by the rotation of the mixing valve body 32, and the rotation angle of the mixing valve body 32 determines the mixing ratio of the water and the hot water.
The electric motor 12a is drive-controlled so that the required mixed water temperature can be obtained based on the detection signal of. Also, switching valve element 3
3 supplies the mixed water to either the first outflow portion 34 or the second outflow portion 35. Therefore, a switch for selecting these is provided, and the mixed water to the outflow side is changed depending on the rotation angle of the switching valve body 33. The drive of the electric motor 40 is controlled so that the flow rate can be set.

In the above configuration, the operation panel P includes a switch serving as operating means 5 for starting and stopping hot water supply, and a setting device serving as temperature setting means 8, and the valve control determining means 9 drives the motors 12a and 40 based on the information. Then, the control according to the present invention is performed.

(Effects of the Invention) As is apparent from the above description, according to the present invention, at the time of hot water supply after one-stop, if the set temperature of the setter is equal to or lower than the predetermined temperature, safe hot water of the set temperature is always supplied. On the other hand, even when the set temperature is not lower than the predetermined temperature, hot water that is higher than the maximum temperature belonging to the temperature range is not discharged and the safety is excellent. Also, when the hot water supply is started and stopped frequently, the control does not necessarily have to be stopped each time, and excellent responsiveness can be achieved.

[Brief description of the drawings]

FIG. 1 is a system diagram of a hot water mixing apparatus according to an embodiment of the present invention, FIG. 2 is a flowchart for explaining the operation of the hot water mixing apparatus according to the embodiment of the present invention, and FIG. 3 shows a hot water mixing valve. It is sectional front view. In the drawing, 1 is a hot and cold water mixing valve, 2 is a mixing pipe, 3
Is a flow regulating valve, 4 is a temperature detecting means, 5 is an operating means, 6 is a position detecting means, 8 is a temperature setting means, 9 is a valve control determining means, 10 is a flow regulating valve driving means, 11 is a position memory, and 12 is a position memory. Valve speed calculating means 13 is a valve driving means.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Shingo Tanaka, Inventor Shingo Tanaka 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Prefecture 2-1-1, Totoki Kiki Co., Ltd.

Claims (1)

(57) [Claims] 1. A hot-water mixing valve for mixing hot water and water from a hot-water heater to adjust hot-water temperature, a flow control valve for adjusting a hot-water supply amount obtained by the hot-water mixing valve,
Temperature detecting means for detecting the temperature of hot water mixed by the hot and cold water mixing valve; a temperature setting device for setting a desired hot water supply temperature obtained through the hot and cold water mixing valve; and operating means for instructing start or stop of the hot water supply Controlling the hot water mixing valve to adjust the hot water temperature to the set temperature of the temperature setting means based on the output of the temperature detector, and controlling the flow control by a hot water supply start or stop command by the operating means. A water / water mixing apparatus including a control unit that controls opening and closing of a valve, wherein the control unit includes: a position detection unit that detects an opening position of the mixing valve; and a position memory that stores predetermined opening position data. When the hot water supply is stopped by the operating means, when the opening position of the mixing valve is in the opening position where the hot water side is closed or the water side is opened in comparison with the predetermined opening position data. In this case, while the drive speed of the mixing valve is set to a low speed, a command to continue the drive control is issued, and the opening position of the mixing valve is compared with the predetermined opening position data to open the hot water side or close the water side. A hot-water mixing device, comprising valve control determining means for issuing a command to stop the drive control when the opening position is at the established opening position.