JPH01121634A - Hot water and cold water mixing device - Google Patents

Abstract

PURPOSE:To perform a stable and efficient control by a method wherein a degree of opening of a mixing valve in the case of refeeding of hot water after one stop can be driven instantaneously to a position of a degree of opening corresponding to a set temperature by a control unit for a hot water mixing device. CONSTITUTION:A control unit is provided with a position sensing means 6 for use in sensing a position of a degree of opening of a mixing valve 1 and a position memory 11 for storing a position of degree of opening of the mixing valve 1 at the time of stopping of feeding of hot water through an operating means 5. The control unit may move the mixing valve 1 to the desired position (for example, a position for fully closing the water side 1b or a position where both water side 1b and hot water side 1a are fully closed) in case of terminating a feeding of hot water so as to keep the operation terminated. In addition, the control unit is provided with a valve controlling and discriminating means 9 for driving the mixing valve 1 to a position of a degree of opening stored in the position memory 11 in case of restarting of a feeding of hot water. Thus, in the case of refeeding of hot water after one stop, it is possible to make an instantaneous driving of a degree of opening of the valve to its original position of degree of opening.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a hot water mixing device that attempts to obtain hot water at a desired temperature by appropriately interlocking and adjusting the amount of hot water supplied and the amount of water supplied, and particularly relates to Concerning improvement of the control unit.

(Prior Art) A hot water mixing device that attempts to obtain hot water at a desired temperature by adjusting the amount of hot water passing through a satsuma valve and the amount of water passing through a water valve is well known. Among these types of hot water mixing devices, there is one that can manually operate a first stop valve to maintain a constant amount of hot water and supply or stop the hot water supply. For example, some washbasin clickers and shower clickers are equipped with this type of mechanism, and in general, the operating mechanism is a one-stop button, one-stop knob, etc. for the purpose of temporarily stopping hot water supply. It is called.

In this case, even if the -degree hot water supply is stopped, the temperature control system continues to operate in preparation for the next hot water supply.

(Problem to be solved by the invention) Therefore, if such a one-stop state continues for more than a certain period of time and the water temperature near the hot water supply mouth drops, the temperature control system will follow the temperature drop and restore the set temperature. This causes the mixing valve to move to the high temperature side. When such control is executed, overshoot occurs when hot water is supplied again, and it takes a long time to reach stable temperature control.

Therefore, according to the present invention, it is an object of the present invention to provide a hot water mixing device that is capable of stable control even when hot water is resupplied after a one-stop hot water supply is stopped.

(Means and effects for solving the problem) In order to achieve this object, the present invention provides a mixing valve for mixing water and water from a water heater to adjust the temperature of the hot water supply, and a mixing valve for adjusting the hot water temperature. a flow control valve that adjusts the amount of hot water supplied by the mixing valve, a temperature detection means that detects the temperature of the hot water mixed by the mixing valve, and a temperature setting device that sets the desired hot water temperature obtained via the mixing valve. an operating means for instructing the start or stop of the hot water supply; and an operating means for driving and controlling the mixing valve to adjust the hot water temperature to the set temperature of the temperature setting device based on the output of the temperature detecting means; A hot water mixing device comprising: a control unit that controls opening and closing of the flow control valve according to a command to start or stop hot water supply, the control unit comprising a position detection means that detects the opening position of the mixing valve; and a position memory for storing the opening position of the mixing valve at the time point based on the output signal of the position detecting means when hot water supply by the means is stopped, and when hot water supply is stopped, the mixing valve is moved to a predetermined position and driving is stopped. The mixing valve is further provided with valve control determining means for driving the mixing valve to the opening position stored in the position memory when hot water supply is resumed.

According to such a configuration, when re-supplying hot water after one-stop, the valve opening can be immediately driven to the original opening position for the set temperature, and therefore stable control can be performed without overshooting. can.

(Embodiments of the Invention) The present invention will be described in detail below with reference to the accompanying drawings. Note that the same reference numerals in each figure indicate similar objects.

FIG. 1 is a system diagram of a hot water mixing device according to an embodiment of the present invention. In the figure, 1 is a mixing valve that adjusts the opening position so that a desired hot water temperature is obtained by interlocking the hot water supply valve 1a and water supply valve 1b with a motor or the like or driving the respective valves, and 2 is a mixing valve 1 for mixing water. 3 is a flow control valve that is opened and closed to supply hot water at a desired flow rate; 4 is a temperature detection means having a thermistor 4a installed in the middle of the mixing pipe 2; and 5 is a start of hot water supply.・Operating means for performing a stop operation; 6 is a mixing valve position detecting means such as a step motor (also serves as a driving motor for the mixing valve 1) for detecting the opening position of the mixed pulp 10; F is a mixing valve position detecting means for detecting the opening position of the flow control valve 3; Flow control valve position detection means for detection; 8 is a temperature setting means for setting a desired hot water supply temperature; 9 to 14 are valve control determination means, which are components of the control unit, respectively; detection of flow control valve position detection means 7; These are a flow adjustment valve position memory that stores values, a mixing valve position memory that stores detection values of the mixing valve position detection means 6, a valve speed calculation means, a valve driving means, and a flow adjustment valve driving means. These configurations will be explained below, focusing on the control unit.

The valve control determining means 9 first compares the output signals of the temperature detecting means 4 and the temperature setting means 8 based on the hot water supply command from the operating means 5, etc., and controls the hot water supply temperature T to approach the set temperature Ts. Second, temperature control is performed using the data in the flow control valve position memory 10 and the mixing valve position memory 11, and the output signal from the position detection means 6.7. That is, when the heating/stopping operation is performed by the operation means 5, the valve speed calculation means 1 issues a command to stop the mixing valve 1 at a predetermined position, for example, at a position where its water supply side is fully closed.
A command to close the one-way flow control valve 3 is outputted to the valve drive means 13 via the valve drive means 2 via the flow control valve drive means 14, and then when the operation means 5 performs a stop → hot water supply operation, the mixing Mixing valve 1 with valve position memory 11
Similarly to the above, a command to drive the flow regulating valve 3 to the opening position stored in the flow regulating valve position memory 10 is output to the valve driving means 13. It outputs to the driving means 14.

The mixing valve position memory 11 uses the hot water supply stop command from the operating means 5 as a set signal S2, and reads the mixing valve opening position at the time of hot water supply from the mixing valve position detecting means 6. Similarly, the flow control valve position memory 10 reads the opening position of the flow control valve 3 at the time of hot water supply from the flow control valve position detection means 7, using the hot water supply stop command from the operating means 5 as a set signal Sl. The contents of these mixing valve and flow control valve position memories 11.10 are read out by a command signal from the valve control determining means 9 itself, and the stored contents of these position memories are read out by a set signal S which is a hot water supply stop command from the operation means 5. It is updated each time it is input.

The valve speed calculating means 12 calculates the opening/closing speed of the valve based on the type of output signal of the valve control determining means 9.6 For example, in the above-mentioned first control, normal opening/closing control is executed; In the second control, a command is given to move to the valve position stored in the mixing valve position memory 11 at, for example, the maximum speed. Such a valve speed calculation means 12 can be configured, for example, by a table memory storing patterns of various valve opening/closing speeds, and uses a part of the output signal of the valve control determining means 9 as an address signal to generate the opening/closing speed signal. Can be read.

The mixing valve driving means 13 is for forming a driving signal for controlling the opening and closing of the mixing valve 1 according to the control method determined by the valve control determining means 9 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 a PWM signal for controlling the motor are generated.

Hereinafter, the operation of the embodiment from the stop of hot water supply to the re-supply of hot water according to the present invention will be explained with reference to the flowchart of FIG. Note that in the following explanation, numbers (18) to (29) correspond to each block number in the flowchart. Also,(
22Y) and (22N) indicate that the decision of the decision block 22 is positive and negative, respectively.

First, when a command to stop hot water supply is generated by operating the operating means 5, a set signal S is generated, and the flow control valve position memory 10 is
The opening position of the flow control valve 3 and the opening position of the mixing valve 1 at the relevant time point are stored in the mixing valve position memory 11 based on the detection values of the respective detection means 7.6 (1
8). As the position detection means, an IC Hall element, a photo coupler, a reed switch, a potentiometer, etc. are used.6 Next, the flow control valve 3 is closed (19), and the mixing valve 1 is set at a predetermined position, for example, on the water side. It is driven to a fully closed position or a position where both the water side and hot water side are fully closed (20), and then stopped (21).

Thereafter, the valve control determining means 9 visually checks whether or not the restart of hot water supply starts (22Y) (22N), and when hot water supply starts, the mixing valve 1 is moved to the valve position stored in the position memory 11. Operate the valve speed calculating means 12 and valve driving means 13 so as to shift at full speed (23)
. At this stage, a subroutine to check whether the mixing valve 1 is operating normally is executed (24). It is checked at regular intervals whether the opening degree of the mixing valve 1 has reached the position stored in the position memory 11 (25), and the valve driving means 13 is operated until the opening degree reaches the position (25).
5N), step (23).

Repeat (24). As a result, when the mixing valve 1 reaches the memorized opening position (25Y), in order to open the flow control valve 3 to the valve position memorized in step 18,
The flow control valve driving means 14 is activated (26). At this stage, while similarly executing the fault check subroutine (27), it is checked at regular intervals whether or not the opening degree of the flow control valve 3 has reached the position stored in the position memory (28). Activate the flow regulating valve driving means 14 until reaching the point (28N), and step (26), (27
) is repeated, and as a result, when the flow control valve 3 reaches the memorized opening position (28Y), the routine returns to the normal temperature control (29), and from then on, the temperature control valve 3 set in the temperature setting means 8 Control is performed so that the set temperature and hot water supply temperature at the time are equal.

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

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

On the left and right sides of the upper end of the hot water mixing valve, short pipes are set up to form a water inflow part 30 and a hot water inflow part 31, respectively.The water inflow part 30 is connected to a water supply pipe 30a, and the hot water inflow part 31 is connected to a water heater, etc. The communicating hot water supply pipes 31a are connected to each other.

A mixing valve body 32 and a switching valve body 33 are arranged coaxially at the upper end and the lower end of the hot water mixing valve 1, respectively, and the switching valve switches the flow path to the first outlet part 34 and the second outlet part 35 at the lower end. Performed by body 5.

The mixing valve body 32 has a cylindrical shape with an open lower end, and 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 from the upper end, and a water passage passing through the inside at the lower end. Flow rectifier 3 for rectifying the mixed water of water and hot water
2d is provided. Further, a water inflow chamber 36 and a hot water inflow chamber 37 communicating with the flow paths from the water inflow section 30 and the hot water inflow section 31 are provided on the left and right sides of the hot water/water mixing valve 1 so as to correspond to the water inflow hole 32a and the hot water inflow hole 32b. It is formed.

The opening centers of the water flow manhole 32a and the hot water inflow hole 32b are set at positions separated by a predetermined angle from the axis of the mixing valve body 32. Therefore, when the mixing valve body 32 is rotated, the water inflow The hole 32a and the hot water inflow hole 32b communicate with the water inflow part 30 and the hot water inflow part 31 at different valve opening degrees, thereby making it possible to mix hot water and water. Further, the opening size and mutual positional relationship of the water inflow hole 32a and the hot water inflow hole 32b are set such that both water and hot water from the water inflow section 30 and the hot water inflow section 31 can be completely closed. When the mixing valve body 32 is rotated from the point where the water is completely cut off, water and hot water are mixed, and when only water is supplied, only the water inlet hole 32a is fully opened or When only hot water is supplied, only the hot water inflow hole 32b can be fully opened.

The switching valve body 33 is similarly cylindrical with an open upper end, and has a mixed water outlet hole 33a in its peripheral wall and a spindle 33b in its lower end. A first outflow chamber 34 communicates with a first outflow portion 34 and a second outflow portion 35 on the left and right sides of the switching valve body 33, respectively.
a and a second outflow chamber 35a are provided.

The above-mentioned mixing valve body 32 and switching valve body 33 are arranged coaxially, and their rotation causes the mixing and flow rate of hot water and the first
, switching the flow path to the second outflow part 34, 35 and stopping the water,
Then, electric motors 12a and 40 for rotationally driving the mixing valve body 32 and the switching valve body 33 are respectively arranged, and the rotation of the output shaft is transmitted to the spindles 32c and 33b via reduction gears 12b and 40a.

A communication passage 41 is formed between the mixing valve body 32 and the switching valve body 33 so as to have a passage axis that coincides with the axis of these valve bodies. An impeller-type flow rate detection device 4 that rotates due to the flow of water is provided on the upper side of the communication channel 41.
2, and a temperature sensor 4 serving as a temperature detection means for detecting the temperature of the mixed water is arranged on the lower side.

Here, the mixing degree of hot water and 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 water and hot water, so it becomes a temperature setting element of the mixed water, and the temperature sensor 4 Based on the detection signal, the electric motor 12a is driven and controlled so that the required mixed water temperature is obtained. In addition, since the switching valve body 33 supplies mixed water to either the first outflow portion 34 or the second outflow portion 35, a switch is provided to select either of these, and the outflow side changes depending on the rotation angle of the switching valve body 33. The electric motor 40 is driven and controlled so that the flow rate of the mixed water can be set.

In the above configuration, the operation panel P includes a switch as the operating means 5 for starting and stopping hot water supply, and a setting device as the temperature setting means 8, and the valve control determining means 9 determines the temperature of the motor 12a based on these pieces of information.

40 to perform control according to the present invention.

(Effects of the Invention) As is clear from the above explanation, according to the present invention, when re-supplying hot water after one-stop, the opening degree of the mixing valve can be immediately driven to the steady-state opening position with respect to the set temperature. Overshoot does not occur, and stable and efficient control can be performed.

[Brief explanation of the drawing]

Fig. 1 is a system diagram of a hot water mixing device according to an embodiment of the present invention, Fig. 2 is a flowchart for explaining the operation of the hot water mixing device according to an embodiment of the present invention, and Fig. 3 shows a hot water mixing valve. It is a cross-sectional front view. In the drawings, 1 is a mixing valve, 2 is a mixing pipe, 3 is a flow control valve, 4 is a temperature detection means, 5 is an operation means, 6 is a mixing valve position detection means, 7 is a flow control valve position detection means, 8
9 is a temperature setting means, 9 is a valve control judgment means, 10 is a flow control valve position memory, 11 is a mixing valve position memory, 12
13 is a valve speed calculation means, 13 is a mixing valve driving means, 1
4 is a flow control valve driving means. Patent applicant: Patent attorney representing Takutokiki Co., Ltd. (Part 2)

Claims (1)

[Scope of Claims] A mixing valve for mixing hot water and water from a water heater to adjust the water supply temperature, a flow control valve for regulating the amount of hot water supplied by the mixing valve, and the mixing valve for controlling the amount of hot water supplied by the mixing valve. a temperature detection means for detecting the temperature of the mixed hot water; a temperature setting device for setting a desired hot water supply temperature obtained via the mixing valve; and an operating means for commanding the start or stop of the hot water supply;
The mixing valve is driven and controlled to adjust the hot water supply temperature to the set temperature of the temperature setting device based on the output of the temperature detection means, and the flow control valve is opened and closed in response to a command to start or stop hot water supply by the operation means. In the hot water mixing apparatus, the control unit includes a position detecting means for detecting the opening position of the mixing valve, and a position detecting means for detecting the opening position of the mixing valve at the time when hot water supply is stopped by the operating means. and a position memory for storing the mixing valve based on the output signal of the position detecting means, and when hot water supply is stopped, the mixing valve is moved to a predetermined position and driving is stopped, and when hot water supply is restarted, the mixing valve is stored in the position memory. A hot water mixing device characterized by comprising a valve control determining means configured to drive the valve to a stored opening position.