JPH01123922A - Hot and cold water mixing device - Google Patents

Abstract

PURPOSE:To prevent inadvertently discharging high temperature water during resupplying hot water by reducing the speed of opening and closing a hot and cold water mixing valve while the hot water supply is being stopped to a low speed and at the same time continuing the temperature control while a sensed temperature is in a specified range of temperature so that the hot water reaches a set temperature and stopping the temperature control if the hot water temperature is not in the specified range of temperature. CONSTITUTION:Firstly a valve control judgement device 9 compares the output signals of a temperature sensor 4 and temperature setting device 8 during the hot water supply based on the instruction of hot water supply from an operator 5, etc. and the output signals from the temperature setting device 8 and controls to bring the supply hot water temperature closer to a set temperature TS. And, during the one stop which is the time of stopping the supply hot water based on the output signals of the temperature detection device 4 and the temperature data TM of a temperature memory 10 and with the drive speed of a hot and cold water mixing valve 1 kept at a low speed when the detected temperature T is within the range (T>=TS-TM) of a specified temperature TM from the set temperature TS the temperature control which is the first control is made. If the detected temperature T is not within the specified temperature range from the set temperature TS(T<TS-TM), the drive of the hot and cold water mixing valve 1 is stopped.

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 stop the hot water supply by operating a flow control valve based on a hot water supply stop command. For example, there are washbasin clickers and shower clickers that have this type of mechanism, and in general, they are used for the purpose of temporarily stopping hot water supply.
The operating mechanism is called a one-stop button, one-stop knob, etc.

In such devices, even if hot water supply is stopped once, the temperature control system is activated in preparation for hot water supply again, and therefore, such a one-stop state continues for more than a certain period of time, causing the water temperature near the hot water supply opening to drop. In this case, the temperature control system will move the hot water mixing valve to the high temperature side in order to follow the temperature drop and restore the set temperature. Therefore, if such control is executed, hot water at an abnormally high temperature may be supplied when hot water is supplied again, which may result in dangerous situations such as burns.

Therefore, such a problem should be solved. In the past, as shown in Japanese Patent Publication No. 62-31232, for example, there is a system in which the drive of the hot water mixing device by the temperature control system is stopped when hot water supply is temporarily stopped.

(Problem to be Solved by the Invention) However, even with such prior art, when the preset temperature during the previous hot water supply is higher than the desired hot water temperature when reheating, etc. If you restart hot water supply carelessly without changing the settings, unexpectedly high temperature water will be discharged, which is dangerous.

Therefore, an object of the present invention is to provide a hot water mixing device that is highly safe by ensuring that hot water at an appropriate temperature that is not too high is discharged when hot water supply is restarted, and then supplying hot water at a set temperature. do.

(Means and effects for solving the problems) In order to solve the above problems, the present invention provides a hot water mixing valve for mixing hot water and water from a water heater to adjust the hot water supply temperature, and this hot water mixing valve. a flow control valve for adjusting the amount of hot water supplied by the hot water mixing valve, a temperature detection means for detecting the temperature of the hot water mixed by the hot water mixing valve, and a temperature for setting the desired hot water supply temperature obtained via the hot water mixing valve. a setting device, an operating means for instructing the start or stop of the hot water supply, and driving and controlling the hot water mixing valve to adjust the hot water temperature to the set temperature of the temperature setting device based on the output of the temperature detection means; A hot water mixing device comprising: a control unit that controls opening and closing of the flow regulating valve based on a command to start or stop hot water supply from the operating means, wherein the control unit controls the opening and closing speed of the hot water mixing valve to a low speed when hot water supply is stopped; At the same time, if the temperature detected by the temperature detection means is within a predetermined temperature range, a command is issued to continue temperature control so that the detected temperature becomes the temperature set in the setting device, while the temperature detection means Valve control determining means is provided for issuing a command to stop the temperature control when the detected temperature of the device is not within the predetermined temperature range.

According to such a configuration, when re-supplying hot water after one-stop, if the set temperature of the setting device is within the predetermined temperature range, safe hot water at the set temperature is always discharged, while if the set temperature is within the predetermined temperature range. Even if the temperature is not within the temperature range, hot water with a temperature higher than the highest temperature within the temperature range will not be discharged, resulting in excellent safety. Furthermore, when hot water supply is started and stopped frequently, it is not necessary to stop the control each time, and excellent responsiveness can be achieved.

(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, reference numeral 1 denotes a hot water mixing valve that adjusts the opening position of the hot water supply valve 1a and the water supply valve 1b by interlocking the hot water supply valve 1a and the water supply valve 1b with a motor or the like or driving the respective valves to obtain the desired hot water temperature, and 2 the hot water mixing valve 1. 3 is a flow regulating valve that is opened and closed to supply a desired flow rate of hot water; 4 is a temperature detection means having a temperature such as a thermistor 4a provided in the middle of the mixing pipe 2; 5
Reference numeral 1 indicates an operation means for starting and stopping hot water supply, 6 indicates a position detection means such as a step motor (also serves as a drive motor for the hot water mixing valve 1), and 7 indicates a flow control valve 3. 8 is a temperature setting means for setting a desired hot water temperature; 9 to 14 are valve control determining means, temperature memory and position, which are components of the control unit, respectively; These are a memory, 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 during hot water supply based on the hot water supply command from the operating means 5 and the output signal of the temperature setting means 8, and determines the hot water temperature T. is controlled so that it approaches the set temperature Ts. Second, temperature control is executed using the data in the temperature memory 10 and the position memory 11 and the output signal of the temperature detection means 4 during one-stop operation when hot water supply is stopped. That is, when the operating means 5 is operated to switch from hot water supply to stop, the valve driving means 13 drives the hot water mixing valve 1 at a low speed via the valve speed calculating means 12, and the flow regulating valve driving means 14 The flow control valve 3 is closed and the following control is performed. First, based on the output signal of the temperature detection means 4 and the temperature data TM of the temperature memory 10, the detected temperature T is changed from the set temperature Ts of the temperature setting device to a predetermined temperature TM.
If it is within the range (T≧TS TM), the temperature control, which is the first control described above, is performed while the driving speed of the hot water mixing valve 1 is kept at a low speed.

On the other hand, if the detected temperature T is not within the predetermined temperature range from the set temperature T3 (T<Tll-TM), the driving of the hot water mixing valve 1 is stopped. At this time, hot water mixing valve 1
The stop position is a position where the hot water mixing valve 1 forms hot water at a predetermined temperature based on the position data of the position detecting means 6 and the position memory 11.

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. For example, in the above-mentioned first control, normal opening/closing control is executed, and in the second control, when the above-mentioned temperature control is continued, it is performed at a low speed, and when it is stopped, the valve position stored in the position memory 11 is executed. command to move at 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 valve driving means 12 forms a driving signal for controlling the opening and closing of the hot water mixing valve 1 and the flow control valve 3 according to the control method determined by the valve control determining means 9 and the calculation speed determined by the valve speed calculating means 12. For example, it forms a signal that determines the rotation direction of the motor and a PWM signal for controlling the motor.

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 (2o) to (31) correspond to each block number in the flowchart. Also,(
Codes such as (21Y) and (21N) indicate that the judgment of the judgment block (21) is positive and negative, respectively.

First, when a command to stop hot water supply is manually given by operating the operating means 5, the valve control determining means 9 lowers the driving speed of the hot 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). Then temperature memory 1o
The temperature data TM and the detected temperature T from the temperature detection means 4 are read (22) and (23) respectively, and it is determined whether the detected temperature T is within a predetermined temperature range from the set temperature Ts of the temperature setting device, that is, T≧T. It is determined whether or not sTM is satisfied (24), and if it is within the range (24Y), the forming temperature of the hot water in the hot water mixing valve 1 becomes the temperature set in the temperature setting means 8. The temperature is controlled as follows (25).

Of course, in this case, the valve is driven at a low speed due to the conditions in step 20.

Then, it is necessary to determine whether hot water supply has been resumed or not26.
), if it is still stopped (26N), return to step 22, while if hot water supply is restarted (26Y), the flow control valve 3 is opened (27), and the normal temperature control routine (28)
Return to

On the other hand, in step 24, if the detected temperature T is not within the predetermined temperature range (24N), the hot water mixing valve 1 is opened to a predetermined value while referring to the output signal of the position detection means 6 based on the position data of the position memory 11. (29), and the drive control is stopped (30). After that, it is necessary to determine whether hot water supply has been resumed or not.31)
, If it is still stopped, please wait 31 N),
When hot water supply is restarted (3'lY), the flow control valve 3 is opened (27), and the process returns to the temperature control routine (28).

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 part 30 and the hot water inflow part 31 are provided on the left and right sides of the hot water/hot water mixing valve 1 so as to correspond to the water inflow hole 32a and the hot water inflow hole 32b. 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
, switches the flow path to the second outlet 34,35. And an electric motor 12a for rotationally driving the mixing valve body 32 and the switching valve body 33.

40 respectively, and the rotation of the output shaft is controlled by the reducer 11.
a, 12a to the spindle 32C133b.

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 description, according to the present invention, when re-supplying hot water after one-stop, if the set temperature of the setting device is within the predetermined temperature range, the safe hot water at the set temperature is always available. On the other hand, even if the set temperature is not within the predetermined temperature range, hot water with a temperature higher than the highest temperature within the temperature range will not be discharged, resulting in excellent safety. Furthermore, when hot water supply is frequently started and stopped, it is not necessary to stop the control each time, and excellent responsiveness can be achieved.

[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 drawing, 1 is a hot water mixing valve, 2 is a mixing pipe, and 3 is a hot water mixing valve.
1 is a flow control valve, 4 is a temperature detection means, 5 is an operation means, 6 is a position detection means, 8 is a temperature setting stage, 9 is a valve control determination means, 10 is a temperature memory, 12 is a valve speed calculation means,
13 is a valve driving means. Patent applicant: TOTOKIKI CO., LTD.

Claims (2)

[Claims] (1) A hot water mixing valve for mixing hot water and water from the water heater to adjust the hot water supply temperature, a flow control valve for adjusting the amount of hot water obtained by the hot water mixing valve, and the hot water 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 through the hot water mixing valve; an operating means for commanding the start or stop of the hot water supply; and the temperature detection means. Driving and controlling the hot water mixing valve to adjust the hot water supply temperature to the set temperature of the temperature setting device based on the output of the means, and opening and closing the flow control valve according to a command to start or stop hot water supply from the operating means. In the hot water mixing device comprising a control unit, the control unit slows down the opening/closing speed of the hot water mixing valve when hot water supply is stopped, and when the temperature detected by the temperature sensor is within a predetermined temperature range. While issuing a command to continue temperature control so that the detected temperature becomes the temperature set in the setting device, if the temperature detected by the temperature detection means is not within the predetermined temperature range, stopping the temperature control. A hot water mixing device characterized by comprising a valve control determination means for issuing a command. (2) In the apparatus according to claim 1, when the temperature control is stopped, the valve control determining means changes the open/close position of the hot water mixing valve to a position where hot water at a predetermined temperature is formed. A hot water mixing device characterized in that it issues a command such as.