JPH02271176A - Flowrate control device - Google Patents

Abstract

PURPOSE:To enable flowrate adjustment and stopping water upon power failure by providing an electrically actuated clutch for transmitting the driving force of a motor to a valve body during power supply and interrupting the force transmission during power failure, and an energizing means after the clutch for actuating the valve body toward a closing direction. CONSTITUTION:When a power switch is pressed with a setting unit 53, a solenoid is electrically energized, thereby forming the condition wherein a driving force can be transmitted via a clutch 23. When a hot water supply switch corresponding to an outlet 31 or an inlet 32 is pressed, a valve body 9 or 10 is opened to the predetermined angle upon a signal from a valve position detector 24. A flowrate is totalled with a flowrate sensor 54 and when the total reaches the predetermined value, a flow control valve 25 is closed, thereby stopping the hot water supply. When it is desired to change a flowrate, an increase or decrease is instructed with the setting unit 53. Then, the flowrate is adjusted with a signal from the valve position detector 24. If there is any power failure during operation, the solenoid loses an adsorption force and the clutch 23 is disengaged. As a result, valve bodies 9 and 10 automatically close a flow passage due to the operation of springs 7 and 8, and hydraulic pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a fluid flow rate control device that controls the flow rate of hot water or water and also performs water shutoff.

2. Description of the Related Art Conventionally, there has been a flow control device of this type as shown in FIG. (For example, Japanese Utility Model Publication No. 61-2438) In FIG. 5, water supplied from a water supply channel 1 passes through a solenoid valve 2 and is supplied to a water supply target. In the middle of water supply channel 1,
A flow rate detection means 3 is provided which detects the water flow rate and outputs a flow rate signal corresponding to the water flow rate. When you set the flow rate integrated value you want to obtain with the setting device 4 and start water supply, the flow rate detected by the flow rate detection means 3 is integrated by the controller 5, and when it reaches the flow rate integrated value set with the setting device 4, , the solenoid valve 2 is closed to fill the bathtub with a predetermined amount of water. Electricity used for these controls is supplied from a power source 6.

Problems to be Solved by the Invention However, the above configuration has the following problems.

(1) The solenoid valve 2 only opens and closes the flow path and cannot adjust the flow rate. For this reason, it was inconvenient when it was desired to reduce the flow rate. In addition, if an instantaneous water heater is used as a water heater, the hot water supply capacity is limited, so in winter there are times when the flow rate is too high and the desired water temperature cannot be obtained. It was impossible to raise the temperature of the water by squeezing it.

(2) Since the solenoid valve 2 is opened and closed rapidly, water hammer often occurs when water is stopped. A solution to this problem was to use a pilot-operated solenoid valve, but this often resulted in malfunction in a short period of time due to scale components in the hot water adhering to the small holes.

In addition, as a countermeasure to these problems, there was a method of using an electric valve that is powered by a motor, but in this case, it has the disadvantage that it cannot be closed during a power outage, and in particular, a power outage occurs during the flow integrated water supply to fill the bathtub with hot water. This often caused the bathtub to overflow with hot water.

The present invention solves these conventional problems.
Water stops and flows without water hammer! The object of the present invention is to provide a flow rate control device that can automatically stop hot water supply in the event of a power outage.

Another object of the present invention is to provide a flow rate control device that allows manual valve operation by cutting off electricity during power outage or failure.

Furthermore, it is an object of the present invention to provide a flow rate control device that can control the opening degree of a valve and does not require valve position adjustment when attaching and detaching the valve and motor or during manual operation.

Means for Solving the Problems In order to solve the above problems, the flow rate control device of the present invention includes:
A valve body, a motor that drives the valve body, an electrically operated clutch that transmits the driving force of this motor to the valve body at 11T4 and disconnects it when electricity is not energized, and a clutch that biases the valve body in the closing direction. The structure includes a biasing means provided therein.

Further, the valve body is configured to include a manual opening/closing means for the valve body after the clutch.

Further, the valve position detecting means for the valve body is provided after the clutch, and the valve position setting device is provided with a controller that controls the motor by comparing signals from the valve position detecting means and the valve position setting device. be.

Operation With the above-described configuration, the flow rate control device of the present invention adjusts the flow rate by controlling the valve with the motor, performs slow operation when closing, and prevents water hammer.In addition, in the event of a power outage, the clutch controls the transmission with the motor. The valve body is closed by a biasing means.

In addition, the valve body opening/closing means provided after the clutch allows manual opening/closing when the valve is not energized.

In addition, since the valve position detection means is provided after the clutch, even if the motor is removed or the valve is opened or closed manually, the relationship between the valve position and the valve position detection means will not be disturbed, and readjustment will not be necessary. It is possible to control the valve opening without having to do so.

Embodiment Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

1 to 3 show a first embodiment of the present invention.

A spring 7 is provided inside the valve frame body 6 as a biasing means in the closing direction.
A valve body 9, 10 is provided which is energized at 8 and has a valve seat 11.1.
The valve seats 11 and 12 can be contacted to shut off water, and the flow rate can be controlled by adjusting the distance between the valve seats 11 and 12. A shaft 13.14 is inserted into the valve body 11.12, and is driven by an external drive unit via a sealing material 15.16, a plug 17.18, and a roller 19.20 provided on the head. . The drive unit includes a motor 21 and a gear box 22
, an electric clutch 23, a valve position detector 24 serving as a valve position detection means, a cam 25, arms 26, 27, a manual operation knob 28, and the like. This flow rate control valve 29 is designed to be able to supply hot water by switching between two locations;
The fluid entering from 0 can be selectively supplied to the outlet 3I or 32.

Figure 2 shows details of the drive section.

One gear in the gear box 22 is configured as a clutch 23, and a large i\T 33 and a small tooth 34 can be connected by a meshing part 35, and an iron core 37 is attracted by energizing a solenoid 36. The meshing structure is such that the mesh is disconnected by the seven springs 36 that are connected together and de-energized. Further, the manual operation knob 2 is provided after this clutch 23, and the valve position detection means 24 is also provided after the clutch 23.

The valve position detection means 24 detects the optical sensor 3 by passing or blocking light through a through hole provided in the disc 38.
A pulse signal is obtained at 9, and the origin is detected by a mechanical switch 40. That is, the valve body 9. The valve position is known by counting whether the pulses are directed in the clockwise or counterclockwise direction with both opening points of the IO as the origin.

FIG. 3 shows the overall configuration of a hot water mixing device.

The hot water and water that come through the hot water route 41 and the water route 42 are maintained.

After passing through inspection water stop valves 43, 44, filters 45, 46, and check valves 47, 48, the pressure is balanced by a pressure balance valve 49, and mixed by a mixing valve 50. The mixed water temperature is detected by a thermistor 51 and compared with a temperature set value in a setting 153 by a controller 52, and the mixing valve 15 is feedback-controlled. The flow rate of the mixed hot water is detected by a flow rate sensor, the flow rate value is integrated by a controller 52, and when a set value set by a setter 53 is reached, a flow rate control valve 29 is closed. The setting device 53 is also equipped with a selection switch for the outlets 31 and 32, which are tap holes, a flow rate value change switch, a power switch, and the like.

Next, the operation of this embodiment will be explained. When the power switch is pressed on the setting device 53, the solenoid 36 is energized and the clutch 23 is placed in a state where driving force can be transmitted.

When the hot water supply switch corresponding to the outlet 31 or 32 is pressed, the valve body 9 or IO is opened to a predetermined opening degree using the signal from the valve position detector 24. The flow rate is integrated using the signal from the flow rate sensor 54, and when it reaches a predetermined value, the flow rate control valve 29 is closed and hot water supply is stopped.

If you want to change the flow rate value during hot water supply, you can make the adjustment by instructing an increase or decrease with the setting device 53. This adjustment is performed using the signal from the valve position detector 24. The speed of the motor 2I during adjustment is controlled to be slower than the speed during opening and closing in order to facilitate adjustment.

Furthermore, in order to prevent water hammer when closing, the speed is controlled to be slower than when opening. If the temperature cannot be obtained even if the hot water side is fully opened with the mixing valve 50, reduce the flow rate with the flow control valve 29 while monitoring the signal from the flow rate sensor 54.If an instantaneous water heater is used as the water heater , the temperature can be obtained by restricting the flow rate. This control can also be performed using only the signal from the valve position detector 24 without using the signal from the flow rate sensor 54. It is also possible to adjust the flow rate by using the signal from the valve position detector 24 when opening and closing, and by using the signal from the flow rate sensor 54 when adjusting the flow rate.

In particular, when an absolute flow rate value is desired during weight adjustment or when the flow rate adjustment speed does not need to be very fast, the signal from the flow rate sensor 54 can be used.

If a power outage occurs during use, the clutch 23 is disengaged because the solenoid 36 loses its suction force, and the valve assembly 9 or 10 is held against the valve seat 1 by the force of the spring 7 or 8 and water pressure.
It is biased in one or twelve directions and the flow path is automatically closed.

Since the load on the gears on the upper stage of the motor 21 and clutch 23 is reduced, hot water can also be tapped in the event of a power outage by manually operating the manual operation knob 28. During this manual operation, the valve position detector 24 detects the valve body 9. Alternatively, since it operates together with 10, the water stop position can correspond to the origin without changing the relative positional relationship.

Furthermore, even if used for a long period of time, malfunctions will not occur because the valve structure does not have small holes like the pilot type. In particular, by using a motor, the speed can be reduced and the driving force is sufficient, so compared to systems such as electromagnetic valves, a larger output can be obtained and sticking can be reliably prevented.

FIG. 4 shows another embodiment of the invention. This is a system in which the valve is rotationally driven by a drive unit having a motor 55, a gear box 56, a clutch 57, and a valve position detection means 58. On the valve side, valve bodies 63 and 64 are provided back to back and biased by a spring 65 in a valve body 62 having an opening 59 and an outlet 60. Move forward and backward by movement. The connection part with the drive part is serration 6B.
are connected with a free seat in the axial direction. The screw 67 is composed of a high-lead three-thread screw, and when the connection with the motor 55 is broken by the clutch 57, due to the force of the spring 65 and water pressure acting on the valve body 63 or 64, which is alternatively opened. The shaft 66 is rotated and moves in the closing direction.

Effects of the Invention As described above, according to the flow rate control device of the present invention, the following effects can be obtained.

(1) Since the valve body is driven by a motor, the valve body can be placed in any desired position, making it possible to adjust the flow rate, and even when closing the valve, it can be opened at a gentle speed that does not cause water hammer. Furthermore, since the connection with the motor is severed by the clutch during a power outage, the valve body and the biasing means can be operated in the closing direction to shut off water, eliminating the problem of overflowing during a power outage.

Furthermore, since it is motor-driven, it is possible to eliminate the small holes required in pilot-operated solenoid valves, thereby increasing reliability.

(2) Since there is a means for manually opening and closing the valve body after the clutch, hot water can be easily turned on and off manually in the event of a power outage or failure of the control system.

(3) By providing a valve position detection means after the clutch, the valve position can be controlled without disrupting the positional relationship with the valve even if there is manual operation or removal of the motor, and control using the flow rate sensor signal is possible. Compared to this, it is possible to control the response quickly, especially when opening the valve.

[Brief explanation of drawings]

1(a) is a partially cutaway front view showing a flow control device according to a first embodiment of the present invention, FIG. 1(b) is a side view of the same, and FIG. 3 is an overall configuration diagram of the same, FIG. 4 is a partially cutaway front view of the second embodiment, and FIG. 5 is an overall configuration diagram of a conventional flow rate control device. 6... Valve body, 7, 8... Spring (biasing means), 9, lO... Valve body, 11.12...
... Valve seat, 21 ... Motor, 23 ...
・Clutch, 24... Valve position detector, 28...
...Manual operation knob (opening/closing means), 52...
- Controller, 53...Setting device (valve position setting device). Name of agent: Patent attorney Shigetaka Awano (1 person) Figure 1 rα〃 Figure 2 Figure 3 Figure 4 Figure 5

Claims (3)

[Claims] (1) A valve seat provided inside a valve body, a valve body, a motor provided outside the valve body that drives this valve body, and a driving force of this motor is transmitted to the valve body when energized, and when not energized. A flow control device comprising: an electrically operated clutch that is sometimes disconnected; and a biasing means provided after the clutch that biases the valve body toward the valve seat. (2) The flow rate control device according to claim (1), further comprising a manual valve opening/closing means after the clutch. (3) A valve position detection means provided after the clutch, a valve position setting device for setting the valve position, and a controller for controlling the motor by comparing the signals of the valve position setting device and the valve position detection means. A flow rate control device according to claim (1).