JPH0211975A - Automatic pressure-regulating valve system - Google Patents

Abstract

PURPOSE:To dispense with any individual flow sensors by attaching a blade, rotating with both hot and cold water flows, to an automatic pressure-regulating valve for a combination device, while detecting the extent of rotation in the automatic pressure-regulating valve, and installing a flow detecting means for detecting both hot and cold water quantities. CONSTITUTION:A piston 21, operating with a secondary pressure differential after decompression, is locked to an intermediate position of a connecting shaft 8 for connecting a hot-water side valve body 4 and a cold-water side valve body 6 to each other, decompressing each primary pressure of a hot-water passage 1 and a cold-water passage 2, thereby constituting an automatic pressure-regulating valve. Two blades 10, 10, rotating with both hot and cold water flows, are attached to these valves 4, 6. An outer circumference of the piston 21 is magnetized, while a magnetoresistant element 24 is set up at the outside. With this formation, when hot water flows, the piston 21 rotates at rotational frequency conformed to the flow rate which is thus detected by a detector 25 via the magnetoresistant element 24.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an automatic pressure regulating valve device such as a hot water mixing device for mixing hot water and water to obtain hot water at an appropriate temperature.

2. Description of the Related Art A conventional hot water mixing device using this type of automatic pressure regulating valve device is shown in FIG. 3 is provided. The automatic pressure regulating valve 3 includes a hot water side valve body 4 that reduces the primary pressure P141 of the hot water flow path 1, a hot water side valve seat 5, a water side valve body 6 that reduces the pressure of the primary pressure Pc1 of the water flow path 2, and a water side valve body 4 that reduces the primary pressure P141 of the hot water flow path 1. The valve seat 7, a connecting shaft 8 connecting the hot water side valve body 4 and the water side valve body 6, and a connecting shaft 8 fixed at an intermediate position between the hot water side valve body 4 and the water side valve body 6, and the secondary pressure PH□, P02 after depressurization of the hot water and water.
A piston 9 that operates with a pressure difference of , valve bodies 4 and 6, and a valve seat 5
．． 7 or in order to prevent the piston 9 from sticking and improve pressure regulation performance, the valve body 4.6 is configured with a vane 10 provided on the surface of the valve body 4.6 on the piston 9 side so as to be rotated by the action of water flow and hot water flow. Even if the pressure of hot water or water suddenly changes, the automatic pressure regulating valve 3 moves with that pressure, and the two pressures P, I2 and P for hot water and water are
The mixing ratio of hot water and water is varied by moving the temperature control valve 12 energized by the motor 11 from side to side to change the mixing temperature. After mixing, hot water is discharged via a flow rate adjustment valve 14, and its temperature is detected by a thermistor 15, and its flow rate is detected by a flow rate sensor 16, and the values are adjusted to match the value of the setting device 17. The controller 18 is the motor 11
And flowing! The regulating on-off valve 14 is energized.

Problems to be Solved by the Invention However, this type of hot water mixing device requires a separate flow rate sensor 16 to detect the flow rate, which causes many problems such as increasing the size of the hot water mixing device, increasing pressure loss, and increasing cost. It had

The present invention solves this problem by eliminating the need for individual flow rate sensors and detecting the flow rate using an automatic pressure regulating valve.
The purpose of the present invention is to provide an automatic pressure regulating valve device that eliminates the problems of increasing the size of a hot water mixing device, increasing pressure loss, and increasing costs.

Means for Solving the Problems In order to solve the above problems, the automatic pressure regulating valve device of the present invention has the following features:
It is equipped with a flow rate detection means that detects the amount of hot water and water by detecting the rotation of the automatic pressure regulating valve.

Function: With the above configuration, the flow rate is measured using an automatic pressure regulating valve, so a separate flow rate sensor is not required. By using this automatic pressure regulating valve device, the hot water mixing device can be made smaller, have lower pressure loss, This allows cost reduction.

Example An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 is a sectional view showing a schematic configuration of an automatic pressure regulating valve device showing one embodiment of the present invention. Here, the same components as the conventional automatic pressure regulating valve are indicated by the same numbers. This automatic pressure regulating valve device has almost the same structure as the conventional one, but the difference from the conventional automatic pressure regulating valve is that the piston 21 has a magnetized outer circumference.
is used to detect the rotation of this piston 21 and determine the amount of hot water,
The point is that a flow rate detection means 22 for detecting the amount of water is provided in the gauging 23 at a position corresponding to the piston 21.

This flow rate detection means 22 is connected to the piston 21 of the casing 23.
It is composed of a magnetoresistive element 24 fixed at an outer periphery holding position and a detection circuit 25 that reads changes in the resistance value of this magnetoresistive element 24.

In the above configuration, when hot water flows, the piston 2 rotates due to the action of the blades 10. The number of rotations almost corresponds to the total amount of hot water and water. When the piston 21 rotates,
The magnetization of the outer periphery causes a change in the magnetic field proportional to the rotational speed, and the resistance value of the magnetoresistive element 24 in the magnetic field changes. The flow rate can be detected by reading the periodic resistance value changes with the detection circuit 25.

Although the above configuration shows a configuration in which the flow rate is detected by capturing the rotation of the piston 21, the same effect can be obtained by using a configuration in which the rotation of the valve body or blades is detected. Further, the crossing of a mark provided on a vane or a piston may be detected using, for example, an optical sensor, without using magnetic changes, and the present invention is not limited to this embodiment.

Effects of the Invention As described above, the automatic pressure regulating valve device of the present invention is equipped with a flow rate detection means that detects the rotation of the automatic pressure regulating valve to detect the amount of hot water and the amount of water. A flow rate sensor is no longer required, resulting in the following features.

(1) When applied to a hot water mixing device, the device can be configured to be small, so it does not get in the way even in a narrow bathroom, and the protrusion from the wall can be reduced, making it safer.

(2) Since the pressure loss in the water flow path and hot water flow path is reduced, it is optimal for cases that require a large flow rate, such as in a pine surge shower, and the degree of system flexibility is improved.

(3) Costs can be reduced by eliminating the need for individual flow rate sensors.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a schematic configuration of an automatic pressure regulating valve device according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a schematic configuration of a hot water mixing device having a conventional automatic pressure regulating valve device. 1... Hot water flow path, 2... Water flow path, 4... Hot water side valve body,
5... Hot water side valve seat, 6... Water side valve body, 7... Water side valve seat, 8... Connection shaft, 10... Vane flow rate detection means, 2
1...Piston, 22...Flow rate detection means, 23...
- Casing, 24... Magnetoresistive element, 25... Detection circuit.

Claims (1)

[Claims] 1. A hot water side valve body, a hot water side valve seat, a water side valve body, and a water side valve seat that reduce the primary pressure of two flow paths, a hot water flow path and a water flow path;
A piston is fixed at an intermediate position of the connecting shaft connecting the hot water side valve body and the water side valve body, and is operated by a secondary pressure difference after pressure reduction of the hot water and water, and a piston is provided on the piston side side of both valve bodies. an automatic pressure regulating valve equipped with a blade that rotates the piston with a flow of hot water and a flow of water, and a flow rate detection means for detecting the rotation of the automatic pressure regulating valve to detect the amount of hot water and the amount of water. .