JPH0331894Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] Industrial Application Field The present invention relates to a fluid mixing valve used, for example, when adjusting the mixing ratio of cold water and hot water to obtain desired hot water.

BACKGROUND ART Conventionally, water heaters and the like often use a mixing faucet or the like to mix cold water and hot water to obtain hot water at an appropriate temperature. Furthermore, there are mixing valves for the same purpose that are equipped with a temperature sensor inside the outlet port, and devices that adjust the mixing ratio by driving the valve actuator according to the difference between the detected temperature and the set temperature are also known. It is being

In a mixing valve equipped with such a sensor, cold water and hot water that flow into the valve body collide and mix and flow out from the outlet port. When the water is small, the mixed water reaches the outlet port without being sufficiently mixed, resulting in inaccurate detection of the temperature of the mixed water, resulting in a decrease in temperature control characteristics.

If a means is adopted in which the temperature sensor is provided at a position sufficiently distant from the inlet port of the valve in order to detect the temperature after the water flow has sufficiently mixed, there is a problem in that the response is delayed.

Problems to be Solved Accordingly, the present invention aims to enable accurate measurement of the average properties of mixed fluids, such as temperature, and to adjust them with high response speed. The aim is to provide a means of achieving complete fluid mixing in short flow paths.

[Structure of the idea]

Means for Solving the Problems The present invention is a fluid mixing valve for achieving the above object, and includes a valve body having an outlet port and a plurality of inlet ports, and a valve body having an outlet port and a plurality of inlet ports, and a valve body having an outlet port and a plurality of inlet ports. The valve body includes a valve body that can be changed in relation to the temperature, and a sensor that is provided near the outlet port and that can detect the temperature of the mixed fluid, and the position where the valve body is installed is different from the position where the sensor is installed. A mixer made of a perforated plate formed in a conical shape is provided in the flow path between the valves so that the top thereof faces the installation position of the valve body.

The mixer used in the present invention has the axis of its conical surface located approximately along the central axis of the flow from the inlet port to the outlet port in the valve, and has many small through holes provided in the conical surface. It consists of a conical perforated plate fixedly provided through which fluid flows from one side to the other.

Effect Fluid flowing into the valve from multiple inlet ports is
By passing through the small holes provided in the conical perforated plate, local turbulence is generated and a sufficient mixing effect is obtained, so that the fluid has stable average characteristics by the time it reaches the outlet port. It comes to show that.

Embodiment An embodiment of the present invention is shown in FIGS. 1 and 2. 1 is a valve body, 1a and 1b are inlet ports, and 1c is an outlet port. Inside the valve chamber 1d is a valve body 2 that swings between the two inlet ports 1a and 1b.
It is provided so as to be driven by an actuator 4 via a stem 3. When the valve body 2 approaches the inlet port 1a and its opening degree decreases, the opening degree of the inlet port 1b increases. When cold water flows in from the outlet port 1c, the temperature of the water flowing out from the outlet port 1c decreases.

Reference numeral 5 denotes a mixer formed from a perforated plate into a conical shape, and is fixed within the valve body 1 so that the inside communicates with the outlet port 1c. On the conical side surface of the mixer 5, a large number of square-shaped through holes 5a are arranged in rows, for example, and when the water flow passes through from the outside to the inside, each creates a turbulent flow and interacts with each other to produce a mixing effect. Increase. Although the shape of the through hole 5a is not particularly limited, a rectangular shape has a greater mixing effect than a circular shape. In addition, the appropriate apex angle A of the conical surface is about 20 to 60°.
If the value of A is too small, the length will be large, making it impossible to downsize the mixing valve, and if the value of A is too large, the mixing effect will be reduced.

Reference numeral 6 denotes a temperature sensor for detecting the temperature of the outflow water, and is provided near the outlet port 1c away from the porous plate 5.

[Effect of idea]

The fluid mixing valve of the present invention has a structure in which fluids flowing in from a plurality of inlet ports are completely mixed when flowing through a perforated plate body formed in a conical shape, and exhibit uniform properties when exiting from an outlet port. As a result, the detection sensor provided near the outlet port can detect fluid characteristics with high response speed, and the mixing ratio can be controlled more stably and easily.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the fluid mixing valve of the present invention, and FIG. 2 is a partially cutaway front view of the fluid mixing porous plate. 1...Valve body, 1a, 1b...Inlet port, 1
c...Exit port, 1d...Valve chamber, 2...Valve body,
3... Stem, 4... Actuator, 5... Mixer, 5a... Through hole, 6... Sensor.

Claims (1)

[Scope of utility model registration request] A valve body having an outlet port and a plurality of inlet ports, a valve body capable of changing the degree of opening of the plurality of inlet ports in relation to each other, and a valve body provided near the outlet port to control the temperature of the mixed fluid. A mixer comprising a perforated plate formed in a conical shape in a flow path between the installation position of the valve body and the sensor installation position, the top of which is connected to the valve body. A fluid mixing valve characterized by being installed so as to face the installation position of the fluid mixing valve.