JP2619430B2 - 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 in a washing machine or a washing machine, and in general, for the purpose of temporarily stopping hot water supply, the operating mechanism is a one-stop button, a one-stop knob, or the like. I'm 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) To solve the problems, according to the present invention, a hot and cold water mixing valve for mixing hot water and water from a water heater and adjusting the hot water temperature, and A flow control valve for adjusting the amount of hot water supplied by the hot and cold water mixing valve; a temperature detecting means for detecting the temperature of the hot water mixed by the hot and cold water mixing valve; and a desired hot water supply temperature obtained through the hot and cold water mixing valve. Temperature setting means for setting, operating means for instructing start or stop of the hot water supply, and 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 detecting means. And a control unit for controlling the flow regulating valve in accordance with a command to start or stop the hot water supply by the operating means. The hot water / water mixing valve is driven to the comfortable setting temperature position so that the hot water temperature obtained by the water mixing valve becomes the comfortable setting temperature, and then the flow control valve is opened and the hot water temperature is set in the temperature setting means. Valve control judging means proportional to drive the hot / cold water mixing valve so as to reach the set temperature when the hot water supply is restarted.

When switching from a low temperature to a high temperature, be sure to position the valve once at the comfortable setting temperature stored in the memory (appropriate temperature that does not cause burns; therefore, lower than the high temperature to be switched). The position of the valve is changed so as to reach the valve setting position.

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 / water mixing valve for interlocking a hot water supply valve 1a and a 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 the degree position, temperature setting means 8 for setting a desired hot water supply temperature, valve control determining means 9 to 13 each being a component of a control unit, temperature memory Beauty position memory memory, including the respective valves 1,3, a valve speed computing means, mixing valve driving means, and flow adjustment valve drive means. Less than,
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 T _S. Secondly, at the time of one stop which is a stop of hot water supply, data of the temperature memory and the memory 10, the position detecting means 6,
Then, the temperature control is executed by the output signal of the temperature detecting means 4.
That is, when the operation of the hot water supply → stop → hot water supply is performed by the operation of the operating means 5, when shifting from this stop to the hot water supply, first, the opening of the hot / water mixing valve 1 is set to the comfortable set temperature opening, and The hot water supply temperature obtained from the hot and cold water mixing valve 1 is a comfortable set temperature (appropriate temperature that does not cause burns etc.)
The hot-water mixing valve is driven so that the hot-water supply valve is opened, and thereafter the flow control valve 3 is opened to start hot-water supply, and the hot-water supply temperature is set to the set temperature at the time of hot-water supply restart set in the temperature setting means 8. The temperature control is performed by driving the mixing valve 1.

Here, "set the opening of the hot and cold water mixing valve 1 to the comfort setting temperature opening" means that the opening is stored in the memory 10 as position data corresponding to the signal obtained by the position detecting means 6. The opening degree of the hot and cold water mixing valve 1 is set via the mixing valve driving means 12 based on the position data. When the flow control valve 3 is opened, the open position of the flow control valve 3 before the stop is fetched into the memory 10 by the flow control valve position detecting means 7 unless the setting is changed. It is assumed that the flow control valve 3 is opened by being driven again to the opened position.

The valve speed calculating means 11 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 first control described above, normal opening / closing control is executed, and in the second control, the memory 10 is controlled.
Command to move to the valve position stored at the maximum speed at the maximum speed. Such a valve speed calculating means 11 can be constituted by, for example, a table memory in which various patterns of the valve opening / closing speed are stored, and a part of the output signal of the valve control determining means 9 is used as an address signal to generate an opening / closing speed signal. Can be read.

The mixing valve driving means 12 includes a valve control determining means 9.
The hot and cold water mixing valve 1 and the flow control valve 3 according to the control method determined by
For example, a signal for determining the rotation direction of the motor and a PWM signal for controlling the motor are formed.

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 hot water supply stop command is input by operating the operating means 5, the valve control determining means 9 reads the opening degree position of the flow control valve 3 by the flow control valve position detecting means 7 and reads the memory 10
(20), and then closes the flow regulating valve 3 (21). Thereafter, the valve control determining means 9 monitors whether or not restart of hot water supply starts (22Y) or not (22N) (2).
2) When the hot water supply is started, the valve speed calculating means 1 shifts to the valve position previously stored in the memory 10 at full speed so as to open the hot water mixing valve 1 to the comfortable set temperature opening.
1. Activate the mixing valve driving means 12 (23). At this stage, a failure check subroutine is executed to determine whether the hot and cold water mixing valve 1 is operating normally (24). It is checked at regular intervals whether the opening of the hot / water mixing valve 1 has reached the position stored in the memory 10 (25), and the mixing valve driving means 12 is operated until the opening reaches the opening (25N). Repeat steps 23) and (24). As a result, when the hot / water mixing valve 1 reaches the stored opening position (25Y), the flow control valve driving means 12 is operated to open the flow control valve 3 to the valve position stored in step (20) (2).
6). At this stage, while executing the failure check subroutine in the same manner (27), it is checked at regular intervals whether or not the opening of the hot and cold water mixing valve 1 has reached the position stored in the position memory (28). The flow control valve driving means 13 is operated until the pressure reaches (28N), and steps (26),
Repeat (27). Then, as a result, when the flow regulating valve 3 reaches the stored opening position (28Y), the routine returns to the normal temperature control routine (29), and the set temperature at this time set in the temperature setting means 28 and the hot water supply The hot water mixing valve 1 is controlled so that the temperature becomes equal.

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 hot water supply pipes 31a to be connected to each other are connected.

A mixing valve body 32 and a switching valve body 33 are coaxially disposed at the upper and lower ends of the hot and cold water mixing valve 1, respectively.
The switching to the outflow portion 34 and the second outflow portion 35 is performed by the switching valve body 33.

The mixing valve body 32 has a cylindrical shape with an open lower end, has a water inflow hole 32a on the upper side and a hot water inflow 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 hot 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 a reduction gear.

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 as temperature detecting means 4 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 32, and the rotation angle of the mixing valve 32 determines the mixing ratio of the water and the hot water. The drive of the electric motor 12a is controlled based on the detection signal of No. 4 so that the required mixed water temperature is obtained. Since the switching valve body 33 supplies the mixed water to either the first outflow portion 34 or the second outflow portion 35, a switch for selecting the same is provided, and the outflow side which changes according to the rotation angle of the switching valve body 33 is provided. The drive of the electric motor 40 is controlled so that the flow rate of the mixed water to 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 clear from the above description, according to the present invention, in hot water supply after a temporary stop, the previously set temperature is high,
In addition, even when the hot water is re-supplied, hot water of the comfortable set temperature (appropriate temperature that does not cause burns, that is, lower than the high temperature to be switched) is always supplied when hot water is restarted. Since the temperature is controlled to be the set temperature, it is possible to prevent a danger of unexpectedly discharging hot water and causing burns when hot water is restarted in a shower or the like.

[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 memory, 11 is a valve speed calculating means, and 12 is a mixing valve. Drive means.

Continuing from the front page (72) Inventor Shingo Tanaka 2-1-1, Nakashima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Tochiki Kiki Co., Ltd. (72) Shinji Shibata 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka No. 1 Toto Kiki Co., Ltd. (56) References JP-A-59-72527 (JP, A)

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, temperature setting means 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 and cold water mixing valve so as to adjust the hot water supply temperature to the set temperature of the temperature setting means based on the output of the temperature detection means, and the flow control valve in response to a start or stop instruction of hot water supply by the operating means. And a control unit for controlling the temperature of the hot and cold water mixing valve so that the hot water temperature obtained by the hot and cold water mixing valve at the start of hot water supply becomes a comfortable setting temperature. And then the flow control valve is opened and the hot water temperature is set in the temperature setting means at the time of restarting hot water supply. A hot and cold water mixing device comprising valve control determining means for instructing a hot and cold water mixing valve to be driven to a temperature.