JPS61109987A - Thermostat mixing valve - Google Patents

Abstract

PURPOSE:To automatically control the temperature of mixed water that does not have a residual deviation due to a change in the hot water pressure by feeding the electrical signal to a control section based on the detected temperature of the mixed water, and automatically adjusting the opening ratio of a water valve and a hot water valve by actuators upon comparing the detected temperature with a setting temperature. CONSTITUTION:A temperature senser 8 is disposed in the way of a mixed water passage 7, and the detected temperature is transduced into an electrical signal which is fed to a controller 9. The controller 9 is electrically connected to actuators 5, 5, and, upon receiving the electrical signal from the temperature senser 8, compares the detected temperature with a set temperature so as to supply an operating signal to the actuators to adjust the opening ratio of a water valve 2 and a hot water valve 4 to the same temperature as the set temperature. The opening ratio of the water valve 2 and the hot water valve 4 is adjusted through the actuators 5 for the automatic control of the mixed water temperature to the set temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a thermostatic mixing valve that is particularly useful in water supply systems requiring highly temperature-controlled water supply.

(Prior art) Conventional thermostatic mixing valves use wax nilemene or bimetal as the temperature sensing body for mixed water, and utilize the movement of the temperature sensing body, which expands and contracts depending on the temperature change of the mixed water. , the temperature of the mixed water is controlled by moving the water valve and hot water valve.

Fig. 11 shows the operating principle of a thermostatic mixing valve whose temperature sensing element is a wax element, Fig. 12 shows its operating flowchart 1~, Fig. 13 shows its block diagram, and Fig. 14 shows its operation flowchart. Temperature control I performance is shown.

In this thermostatic mixing valve, the temperature sensing element 51 located in the mixed water flow path 50 [the water flow path 52 d'
3 and the mixed water flow path 5 which flows in and passes through the positive flow path 53.
It reacts to the temperature change of the mixed water in the tank 0, and more specifically, when the temperature of the mixed water increases, it expands and moves the rod 54 upward, and the water flows through the rod 54 and the actuating rods 55 and 56 in an integrally interlocking manner. The opening degree of the water valve 57 is increased and the opening degree of the hot water valve 58 is decreased, and when the mixed water temperature is low, the rod 54 is contracted and moved downward, and the opening degree of the water valve 57 is decreased. The opening of the hot water valve 58 is increased to automatically control the mixed water temperature to a set temperature. The temperature of the mixed water is set by adjusting the opening ratio of the water valve 57 and the hot water valve 58 by raising or lowering the rod 54 using a lever or handle for temperature adjustment, and the set temperature is adjusted by operating the lever or handle. This is the configuration you are changing.

(Problems to be Solved by the Invention) The first problem is that, for example, if you use a shower in another location, the temperature of the shower will change due to the fluctuations in water pressure that occur. There is a problem in that a temperature difference, that is, a residual deviation, always occurs when the temperature is changed and the temperature is almost stable.

As shown in the graph showing the temperature control performance in Figure 14, this residual deviation is approximately 3 between the shower temperature a before the lift pressure level b fluctuates and the shower temperature a2 at the time when the temperature has stabilized at the changed temperature.
℃, and the same is true for bimetals, but this is an unavoidable problem unique to wax element moisture sensitive bodies.

The second problem is setting the mixing water temperature, which is done by operating a lever or handle that is integrally provided as part of the thermostatic mixing valve, and the temperature setting is limited to the valve position. The problem is that settings cannot be performed from a remote location away from the valve.

The third problem is that the temperature setting is controlled by a lever or handle, and the temperature cannot be set unless the lever or handle is moved by tilting or turning.

(Means for Solving the Problems) In order to solve the above-mentioned first to third problems all at once, the present invention has a basic configuration that converts the temperature of mixed water into an electrical signal using a temperature sensor. Then, this electrical signal is sent to the drive unit as an operating signal through the control unit, and the drive unit is operated to adjust the opening ratio of the water valve and/or hot water valve, making it possible to automatically control the mixed water temperature to the set temperature. It is something. For more details,
A water valve is provided in the middle of the water flow path, and a hot water valve is provided in the middle of the hot water flow path, and a drive unit having a motor that can vary the opening ratio of both valves is connected to the water valve and/or the hot water valve. The mixed water flow path with which the tidal flow path communicates is equipped with a temperature sensor that senses the temperature of the mixed water in the path and converts the sensed temperature into an electrical signal, and this temperature sensor is connected to the drive unit and the temperature sensor. A control unit that can control the operation by comparing the electrical signal received from the controller with an electrically settable temperature and sending an operating signal to the drive unit to adjust the opening ratio of the water valve and hot water valve to the same temperature as the set temperature. It is characterized by being configured by contacting.

Further, to explain the drive unit of the present invention in detail, the drive unit may be a drive unit provided exclusively for the water valve and the hot water valve, or a drive unit provided for both the water valve and the hot water valve. It is a driving part for a water valve or a hot water valve.

The 111111 section receives an electric signal from the temperature sensor, sends an operating signal to the drive section, controls the operation of the drive section, sends an operating signal for a set temperature to the drive section, and controls the operation of the drive section. A control unit that sends operating signals for water stop and water supply to the drive unit to control the operation, or a control unit that receives electrical signals from a temperature sensor and sends operating signals to the drive unit to control the operation of the drive unit. This is a control unit that sends an operation signal for the set temperature to the drive unit and controls the operation 1211.

(Function) A temperature sensor senses the temperature of the mixed water passing through the mixed water flow path and converts the sensed temperature into an electrical signal.The control unit that receives this electrical signal compares it with the set temperature and drives the required operating signal. The drive unit automatically adjusts the opening ratio between the water valve and the hot water valve, and the temperature of the mixed water passing through the mixed water flow path is automatically controlled to a set temperature.

The set temperature is controlled by the control section 1i11, and the opening degrees of the water valve and the hot water valve are automatically set by the drive section.

(Example) Examples of the present invention will be described below.

FIG. 1 shows the basic configuration of the present invention, and a thermostatic mixing valve A includes a water valve 2 in the middle of a water flow path 1 and a hot water valve 4 in the middle of a hot water flow path 3. 4 is connected to a drive unit 5 having a motor that can vary the opening ratio of both valves, and a mixed water flow path 7 in which the water flow path 1 and the hot water flow path 3 communicate with each other is connected to a drive unit 5 that is sensitive to the temperature of the mixed water in the path. The temperature sensor 8 is connected to the drive unit 5, and the electric signal received from the temperature sensor 8 is compared with a set temperature that can be set electrically. Then, an operating signal for adjusting the opening ratio of the water valve 2 and the hot water valve 4 to the same temperature as the set temperature is sent to the drive section 5 and communicated by the control section 9, which controls the operation.

2 to 4 show a specific embodiment.

Water valve 2 is in the middle of water flow path 1 of valve body A+, hot water flow path 3
On the way, hot water valves 4 are provided so as to be rotatable about the vertical J-axis, and these water valves 2. (The rotation shafts 10 of the drive unit 5 are integrally connected to the upper end shafts of the water valve 3 and the hot water valve 4, respectively, and the water valve 2 is driven by the drive unit 5 to rotate in the forward and reverse directions. It is possible to increase or decrease the opening ratio of the notch-like opening 11 with respect to the valve seat hole 12 on the mixed water flow path 7 side, and the hot water valve 4 is similarly driven by the drive unit 5 to rotate in forward and reverse directions to close the valve seat of the mixed water flow path 7011. The frontage ratio of the cutout opening 13 to the hole 14 can be increased or decreased.

The drive unit 5 outputs the driving force of the motor 6 to the rotating shaft 10 via a deceleration element, and these drive units 5 are connected to the water valve 2 and the hot water valve 4.
The opening of both valves is controlled by controlling the direction of rotation so that the opening ratio of both valves does not increase or decrease at the same time, and so that the opening ratio of one increases or decreases relative to the other. By adjusting the ratio, the temperature of the mixed water can be adjusted by adjusting the ratio between the water reaching the mixed water flow path 7 and the field.

A temperature sensor 8 is leaked in the middle of the mixed water flow path 7, and this temperature sensor 8 senses the temperature of the mixed water passing through the flow path 7, converts the sensed temperature into an electrical signal, and also outputs the same electrical signal. It is connected to and communicates with the control section 9 so that signals can be sent to the control section 9.

The control unit 9 is connected to the drive units 5 and 5, and this control unit 9 receives an electric signal from the temperature sensor 8, compares it with the set temperature, and adjusts the water valve to the same temperature as the set temperature. 2 and hot water valve 4
An operating signal is sent to the drive unit to adjust the opening ratio of the water valve 2 and the hot water valve 4 through the double layer moving part 5, thereby making it possible to automatically control the mixed water temperature to the set temperature. .

In addition, the Il@ section 9 sends an operating signal for the set temperature to the double-layer moving section 5 in response to an electrically settable set temperature, and sends the water valve 2 and the hot water valve through the double-layer moving section 5. 4 is made adjustable, and also sends operating signals for water supply/stopping and water supply amount to the double-layer moving part 5.
Through this, the water valve 2 and the hot water valve 4 can be opened and closed and controlled to a desired degree of opening.

The temperature setting of the mixed water temperature in this 1III11 section 9, water supply/stopping, and water supply (2) operations can be electrically processed by turning a Daicel or pressing a push button.

As a result, the temperature of the mixed water passing through the mixed water flow path 7 is automatically controlled to the set temperature, and the water supply/stop and water supply amount can be controlled by touch operations such as push buttons.

In the example of refusing, a control example without differential control by the control unit 9 and a control example with differential control will be explained.

Figures 5 to 7 show the operation flowchart (Figure 5), block diagram (Figure 6), and temperature control performance (Figure 7) in J3 in a control example without differential control. The process is carried out as shown in flowcharts 1 to 1, and every time the mixed water temperature changes due to fluctuations in the pumping pressure level b, the temperature sensor 8 senses the detected temperature TW, converts the sensed temperature TW into an electrical signal, and sends the signal to the control section. 9, the control unit 9 compares the set temperature Ts and the sensed temperature Tw, and if the sensed temperature TW is lower than the set temperature TS by -0.5°C or more, the hot water valve is turned on at a speed proportional to the temperature difference. Reduce the opening ratio of water valve 2 to 4 and measure the 1 stomach of the output m4 degrees 1-M, and if the sensed temperature Tw is 0.5℃ or more higher than the set temperature S, the temperature will be proportional to the temperature difference. At this speed, the opening ratio of the water valve 2 to the hot water valve 4 is increased to measure the decrease in the outlet temperature TM, and as a result, if the detected temperature Tw is within ±0.5°C or the same temperature as the set temperature, By fixing the opening ratio of the water valve 2 to the hot water valve 4,
The temperature of the mixed water passing through the mixed water flow path 7 is automatically controlled to be the same as the set temperature Ts.

In this control example, as shown in the graph showing the temperature control performance in Fig. 7, the set temperature TS, that is, the shower temperature a before positive pressure fluctuation.
The temperature difference between the shower temperature A2 and A2 when the temperature is stabilized immediately after the water pressure fluctuates is as small as 0.5℃, and the difference is within 1℃, so small that it is hardly felt by the human body, and there is virtually no residual deviation. does not occur.

Figures 8 to 10 are an operation flowchart (Figure 8), a block diagram (Figure 9), and a control example with differential control.
The temperature control performance (Fig. 10) is performed as shown in operation flowchart 1. Whenever the mixed water temperature changes due to fluctuations in the pumping pressure level b, the temperature sensor 8 is sensed and converts the sensed temperature Tw into an electric signal and sends it to the control unit 9, and the control unit 9 compares the set temperature TS and the sensed temperature Tw and determines whether the sensed temperature Tw is -0.5 lower than the set temperature TS. The opening ratio of the water valve 2 to the hot water valve 4 is reduced at a speed proportional to the temperature lower than °C to measure the rise in the outlet temperature TM, and the sensed temperature Tw is 0.5% lower than the set temperature T5.
If it is higher than ℃, the temperature difference and the opening ratio of the water valve 2 to 4 are increased to measure the decrease in the outlet temperature TM, and as a result, the detected temperature Tw is within ±0.5℃ or the same temperature as the set temperature. In this case, the opening ratio of the water valve 2 to the hot water valve 4 is fixed, and the temperature of the mixed water passing through the mixed water flow path 7 is automatically controlled to the same temperature as the set temperature TS.

In this control example, as shown in the graph showing the temperature control performance in Fig. 10, below the set temperature S, that is, Yue change! The temperature difference between the shower temperature a of IJ rWi and the shower temperature a2 when the temperature has stabilized after fluctuations in water pressure is as small as 0.5 degrees Celsius, so small that it is barely noticeable to the human body. ℃, virtually no residual deviation occurs.

In addition, the shower temperature a1 immediately after the hot water pressure fluctuates is determined by the temperature control reaction processing by the temperature sensor 8, the control unit 9, and the drive unit 5, which is quick and has excellent responsiveness.
The time it takes for the shower temperature to return to the changed temperature a2 is 5.
Only 2 seconds compared to wax elmmen that takes 1 to 2 seconds.
The operating time is as short as seconds, the operational response to external disturbances such as fluctuations in hot water pressure is sharp, and temperature control is well managed.

As another embodiment, in the embodiment described above, the control unit 9
Controlling the opening ratio of the water valve 2 and the hot water valve 4 through the both-side moving parts 5 by +2[1 by rotating both valves in opposite directions at the same time,
By adjusting the opening ratio in inverse proportion, it is possible to shorten the adjustment time by h4. In this case, the drive unit 5 is capable of moving the water valve 2 and the hot water valve 4 to the rotation side with one drive unit.

Further, it is also possible to configure the water supply system so that water supply, water stoppage, and water supply direction adjustment are performed by operating a lever or a handle, as in conventional products.

As another embodiment, only one of the water valve 2 and the hot water valve 4 is controlled by the temperature sensor 8, the control unit 9, and the drive unit 5,
It is also possible to automatically control the temperature of the mixed water with the water valve 2 or hot water valve 4 operated by a lever or handle fixed.

(Effects of the invention) ■ With respect to hot water pressure fluctuations, there is no difference between the mixed water temperature C when the temperature stabilizes at the changed temperature after the hot water pressure fluctuations and the set temperature before the positive pressure fluctuations, and there is virtually no residual deviation. .

■ There is no residual deviation due to fluctuations in hot water pressure, and the temperature change is controlled to a minimum so that the difference is so small that it cannot be felt by the human body.The mixed water temperature can be automatically controlled to a temperature that is virtually the same as the set temperature, and is stable. Water supply C is available.

■ Control the set temperature of the mixed water You can freely set the temperature by adjusting the opening ratio of the water valve and hot water valve with electrical commands through the drive part, for example, by pressing the push button and viewing the digital display. This can be done by touch operation, etc.

- The control section, the temperature sensor, and the drive section are electrically connected, so that there is no problem even if only the control section is moved to a remote location, and requests for remote control can be met.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the basic operating principle 4 of the nermostat mixing valve-f of the present invention. FIG. 2 shows an embodiment of the present invention, and is a partially cutaway front view. Figure 3 is a vertical cross-sectional side view taken along the line ■-■. Fig. 4 is a partially enlarged cross-sectional plan view taken along the line IV-IV; Fig. 5 is a control section without differential control by the control unit; Figure 7 is a graph showing the temperature control performance. Figure 8 shows an example of control with differential control by the control unit (
), Figure 9 is the same block diagram,
FIG. 10 is a graph showing the temperature control performance. , Fig. 11 is a configuration diagram showing the basic operating principle of a conventional thermostatic dispensing valve, and Fig. 12 is an opening operation flowchart 1-
13 is a block diagram of the same, and FIG. 14 is a graph showing the temperature control performance. In the figure, 1 is a water flow path, 2 is a water valve, 3 is a hot water flow path, 4 is a hot water valve, 5 is a drive unit, 6 is a motor 7 is a mixing water flow path, 8 is a temperature sensor 9 is a control unit Patent Applicant: Toto Beski Co., Ltd. company t
○Figure 10t ○
Proceedings FtJ Seiju December 1, 1980 1, Display of the case 1982 Patent Application No. 230864 2, Name of the invention Thermostatic mixing valve 3, Person making the amendment Relationship to the case Patent applicant Name ( (Name) (AO8) Totoki Co., Ltd. 4, Agent address: 5-14-7-5 Hakusan, Bunkyo-ku, Tokyo Date of amendment order (voluntary amendment) Showa year, month, day, 6, ? Ili positive target drawing

Claims (1)

[Claims] A water valve is provided in the middle of the water flow path, and a hot water valve is provided in the middle of the hot water flow path, and a drive unit having a motor that can vary the opening ratio of both valves is connected to the water valve and/or the hot water valve. The mixed water flow path with which the hot water flow path communicates is equipped with a temperature sensor that senses the temperature of the mixed water in the path and converts the sensed temperature into an electrical signal, and this temperature sensor is connected to the drive unit and the temperature sensor. A control unit that can control the operation by comparing the electrical signal received from the sensor with an electrically settable temperature and sending an operating signal to the drive unit to adjust the opening ratio of the water valve and hot water valve to the same temperature as the set temperature. A thermostatic mixing valve consisting of a contact.