JPS582349B2 - Mizuseigiyoki - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention solves the problem of large water flow noise caused by excessive water flow when equipment is used in areas with high water pressure. The purpose of the present invention is to suppress the occurrence of cavitation by flowing through this water passage, and to obtain a water controller that does not generate instantaneous water flow sound when a water stop valve is opened.

For equipment that has a water passage part, such as a top-type gas instantaneous water heater,
When the inlet water pressure is high, if you open the stop valve or stop faucet all at once, the high pressure flow directly passes through the governor room and into the diaphragm room, and in the case of a bias system, flows from there to the heat exchanger. The water flows through the main water passage and the bypass passage which flows directly to the outlet without passing through the heat exchanger, and the water flows to the bypass passage where the water flows directly to the outlet, where they meet near the outlet and reach the hot spring day.

The flow through the main water passage creates a pressure difference in front and behind the diaphragm, which activates the diaphragm.The governor actuator, which is installed to follow the movement of the diaphragm, also works at the same time, stabilizing the flow rate through the water passage. However, during this period from when the stop valve is opened until the governor operates normally, a flow rate that exceeds the predetermined flow rate will flow depending on the magnitude of the inlet water pressure, albeit for a short period of time.

Therefore, excessive flow flows in each of the main water passage and the bypass water passage, and this causes cavitation to occur in parts with high water flow resistance, such as parts of the penturi or the flow rate adjustment part, which causes resonance in the heat exchanger, etc. This was causing a loud water flow noise.

On the other hand, when the bypass passage is fully closed (minimum flow rate) or close to it, it becomes almost the main passage only, and the governor actuator rises and the governor acts suddenly, causing sudden pressure on the downstream side. It caused a drop and a water hammer sound.

In this way, two types of water flow noises with different characteristics are generated due to the sudden opening of a water shutoff valve or the like when the water pressure is high.

The phenomenon is also the same in a series type waterway configuration that does not have a bypass passage, but in this type, the resistance at the throttle part cannot be made as large, so the water flow noise is lower than in the bypass type. .

In any case, when the equipment starts to be used in areas with high water pressure, water passing noise occurs, and if the water controller has a stop structure, the water passing noise becomes particularly loud, which has resulted in complaints.

This is the appearance of conventional products, but there are some that use a method to reduce the occurrence of cavitation by slightly devising the venturi structure, but this reduces the water flow noise somewhat, but the water hammer noise that occurs at the minimum flow rate had no effect.

The present invention solves these conventional problems, and one embodiment thereof will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a main body, and a cap 2 is provided with a diaphragm 3 in between.The vertical movement of the diaphragm 3 is transmitted to the outside by a shaft 4, and is used to open and close gas valves and the like.

Water enters from the inflow part 5, passes through the water stop part 7 formed by the water stop valve 6 and the body 1, and reaches the governor chamber 8.

It passes through the governor part 10 formed by the gapper 9 and the body valve seat part, enters the diaphragm high pressure chamber 11, further passes through the flow rate adjustment part 13 formed by the flow rate regulator 12 and the body 1,
After passing through a venturi section 14 which generates a pressure differential that drives the diaphragm 3, the water passes from the water pipe 15 to the heat exchanger 16.

The low pressure generated in the venturi section 14 is led to a low pressure chamber 17 on the back side of the diaphragm.

The hot water heated by the heat exchanger 16 passes through the hot water pipe 18, enters the body 1 again, passes through the outlet part 19, and enters the hot water outlet pipe 20.
Go outside.

In addition, in FIG. 1, from the diaphragm chamber 11 to the heat exchanger 16
In addition to the water passage entering the outlet 1 without passing through the heat exchanger 16
9, which shows a bypass waterway configuration having a bypass adjustment section 22 midway.

21 is a drain plug.

Further, an instantaneous water passage 23 is provided from the diaphragm high pressure chamber 11 to bypass the flow rate adjustment part 13 and the venturi part 14, and a pressure response device A is provided in the middle thereof.

Its configuration is shown in Figure 2, with diaphragm high pressure chamber 1
A hydraulic response device A is provided so as to oppose the flow from the heat exchange channel 1 to the heat exchange channel, and a valve body 25 is always energized by a spring 26 on a valve seat 24.

This hydraulic response device A does not operate near the pressure of the diaphragm high pressure chamber 11 in normal use, but has a valve structure and a spring 26 strength set such that it opens when high pressure is applied to the diaphragm high pressure chamber 11. .

Therefore, when the water pressure at the inlet portion 5 is standard pressure, even if the stop valve 6 is opened and water is allowed to flow, this device A does not operate, and there is no difference from the case where this device A is not present.

However, when the inlet water pressure becomes high pressure, high pressure acts on the water passage when the water stop valve 6 is opened, and for a moment until the governor section 10 reaches the control range, high pressure water also flows after the diaphragm high pressure chamber 11. In this case, the high-pressure water causes the hydraulic response device A shown in Fig. 2 to open, and the momentary bypass water passage 2 opens.
3, and the instantaneous pressure rise in the diaphragm high pressure chamber 11 is suppressed.

Therefore, the instantaneous excessive flow rate passing through the flow rate adjustment section 13 and the venturi part 14, which have large water flow resistance, is greatly reduced, and the occurrence of cavitation is significantly reduced, resulting in a significant reduction in water flow noise.

In this case, the passage diameter of the instantaneous bypass passage 23 is set to be smaller than the passage diameter of the venturi part 14 to reduce the water flow resistance of this passage 23, so that even if an excessive flow momentarily flows through the instantaneous bypass passage 23, , it is necessary to design so that cavitation does not occur significantly.

Next, when the governor operates and the normal state is established, the pressure in the diaphragm high pressure chamber 11 is also reduced, and the hydraulic response device A is also closed, preventing water from passing through the instantaneous bypass passage 23 and returning to the normal operating state.

In addition, by installing this device, the water hammer sound that occurs when the flow rate adjustment unit 13 is fully closed at the minimum flow rate can significantly suppress the instantaneous pressure rise in the diaphragm high pressure chamber 11, thereby alleviating the sudden pressure drop. It will become smaller.

It should be noted that if the outlet of the instantaneous bypass waterway is provided after the flow rate adjustment part and the constriction part such as a venturi, the effect will be the same even if it is provided somewhere from the heat transport path to the outlet.

The functions of each part are the same as those of conventional products, so detailed explanations are omitted, but they are as follows.

The water stop section 7 opens and closes the water by human operation, and the governor section 10 performs a governor function in conjunction with the operation of the diaphragm 3 so that the flow rate is constant even when water droplets fluctuate. When it flows, it functions to open the gas valve.

Further, the flow rate adjustment section 13 is operated by a person to change the opening area and adjust the flow rate to obtain a desired temperature rise.

Further, the drain plug 21 is used to drain water after use of the equipment to prevent damage to the equipment due to freezing and expansion of residual water in cold regions.

As explained above, according to the water controller of the present invention, by providing an instantaneous bypass passageway and a water pressure response device, the instantaneous water flow noise that occurs when the stop valve is opened when equipment is used in a high water pressure area can be suppressed. This phenomenon can be eliminated, and there is no discomfort caused by noise every time the device is used.

[Brief explanation of the drawing]

FIG. 1 is a cutaway view of a water controller showing an embodiment of the present invention, and FIG. 2 is a sectional view of a hydraulic response device. 5... Inflow section, 10 Governor section, 11...
・Diaphragm high pressure chamber, 13...Flow rate adjustment section,
23... Conduit, A... Water pressure response device.

Claims (1)

[Claims] 1. A water passage configuration from the water inflow section to the diaphragm high pressure chamber through the governor section and from the heat transfer path to the outlet via a passage having a flow rate adjustment section and/or a ventilator section, and the diaphragm high pressure An instantaneous bypass water passage is formed, which flows from the chamber to the downstream side of the throttling part by bypassing the throttle part, and is disposed at a distance from the throttle part, and high pressure water is passed from the diaphragm high pressure chamber side into the instantaneous bypass water passage. A water controller equipped with a hydraulic response device that opens the valve and allows water to flow when the water is activated.