JPS5818037Y2 - Mizubulb - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a water valve for an instantaneous water heater.

In conventional instantaneous water heater water valves, the pressure difference between the low-pressure side and the high-pressure side occurs at the same time as the water flow, so the diaphragm is suddenly raised, and the gas valve connected to the operating pin is instantaneously opened, causing the gas to flow. There was a risk that the burner would suddenly flow out and instantly ignite the burner, causing an explosion or flames overflowing from the appliance.

The present invention has been improved to eliminate such drawbacks, and will be explained below based on an embodiment shown in the drawings.

Reference numeral 1 denotes an ice chamber, and the interior of the water chamber 1 is divided into a low-pressure side water chamber 3 at the top and a high-pressure side water chamber 4 at the bottom via a diaphragm 2 that moves appropriately in response to water pressure in the center of the interior of the water chamber 1 .

A water governor 5 is located at the center of the diaphragm 2 and at the bottom.
, an operating pin 6 is provided at the top to open and close the gas valve via an O-ring 7, and a low-pressure side water chamber 3 and a water chamber 1 are provided.
A relatively large diameter buffer chamber 10 with a narrowed middle and lower end is connected between the circuit and the Venturi tube 9 provided in the waterway 8
are provided, and the intermediate constricted portion 10a and the lower end constricted portion 10b
A cup-shaped fluidic element 11 is built into the empty chamber 10C formed between the intermediate constriction part 10a and the cup-shaped fluid element 11 that delays water suction by generating a vortex when water is sucked into the low-pressure side ice chamber. are doing.

In the water valve of the instantaneous water heater configured in this way, when the main water flow occurs, the pressure in the throttled part of the venturi tube 9 becomes low, and the water in the water chamber 3 on the low pressure side of the diaphragm 2 is sucked out into the venturi tube 9. However, at this time, the intermediate constriction section 10 of the buffer chamber 10
The water flow becomes faster at the a and the lower end constricted portions 10b, and this water flow hits the cup-shaped fluid element 11 to generate a vortex.

Therefore, water gradually flows into the Venturi tube 9 portion, and no sudden pressure difference occurs between the low-pressure side water chamber 3 and the high-pressure side water chamber 4.

Therefore, the water pressure in the low-pressure side ice chamber 3 is gradually lowered, the diaphragm 2 is gradually raised, the operating pin 6 is pushed up, the gas valve is opened with a slow operation, and the gas gradually flows, so that sudden ignition does not occur.

Conversely, when the main water flow stops, the water starts flowing into the low-pressure side water chamber 3, the resistance in the water channel 8 decreases, the water pressure rises rapidly, and the diaphragm 2 suddenly drops.

Therefore, the gas valve connected to the operating pin 6 is suddenly closed, the gas is stopped, and the fire is stopped instantly.

By providing a water valve in this way, the gas can be ignited and extinguished smoothly, which is of very high practical value.

[Brief explanation of drawings]

The figure is a cross-sectional view of the structure of the present invention. 1: Water chamber, 2: Diaphragm, 3: Low pressure side ice chamber, 4: High pressure side water chamber, 8: Water channel, 9: Venturi tube, 10: Buffer chamber, 10a: Intermediate throttle section, 10b: Lower end throttle section, 10C
: Vacant room, 11: Cup-shaped fluidic element.

Claims (1)

[Scope of utility model registration request] An ice chamber is provided that is divided into a low-pressure ice chamber and a high-pressure ice chamber by a diaphragm, a Venturi tube is provided in the waterway leading to the high-pressure ice chamber, and the moment when the narrow diameter portion of this Venturi tube is communicated with the low-pressure ice chamber. In the water valve of a water heater, a relatively large-diameter buffer chamber with a narrowed middle and lower end is inserted into the circuit that communicates the small-diameter portion of the Venturi tube with the low-pressure side ice chamber, and this A cup-shaped fluid element is provided in the empty space formed between the constriction part and the lower end constriction part, which opposes the intermediate constriction part and slows down the suction by generating a vortex flow when water is sucked into the low-pressure side ice compartment. A water valve for an instantaneous water heater that is characterized by a built-in water valve.