JPS6225616Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a flow rate control device for a stop-start type instantaneous water heater, and is capable of stably varying the amount of hot water by adjusting the opening degree of the hot water tap.

Examples of the present invention will be explained below with reference to the drawings.
1 is a constant flow water governor installed in the water passage 2 of the instantaneous water heater, and has a high pressure chamber 4 divided by a diaphragm 3.
It has a governor valve body 6 that controls the amount of water flowing in conjunction with the diaphragm 3, and the movement of the diaphragm 3 is transmitted to a gas valve (not shown) to open and close it. Reference numeral 7 designates a low pressure generation ventilate provided in the passageway 2, and reference numeral 8 designates a low pressure introduction pipe which communicates with the low pressure chamber 5 from the side wall of the ventilator 7. 9 is a heat exchanger disposed downstream of the ventilate 7 and heated by a burner (not shown); 10 is a hot water tap provided at the end of the water passage 2; Reference numeral 11 denotes a constant pressure water governor disposed between the high pressure chamber 4 and the ventilate 7 of the constant flow water governor 1, and the valve body 12 slides as the water flow pressure changes, and the conical valve portion 13 of the constant flow water governor 11 slides. It is configured to control the amount of water flowing by adjusting the opening degree of the water hole 14. Reference numeral 15 denotes a spring that constantly presses the valve body 12 in the direction in which the valve portion 13 opens the water passage hole 14 .

Generally, in a stop-start instant water heater, the water temperature is adjusted using a manual water temperature regulator installed between the constant-flow water governor and the ventilator, which opens and closes the gas valve in conjunction with each other. In that case, it is necessary to go all the way to the equipment, which is extremely cumbersome to operate. Therefore, if the hot water temperature could be adjusted from the hot water supply point, the usability would be dramatically improved, but a constant pressure water governor 11 is installed between the constant flow water governor 1 and the ventilate 7.
In a conventional system without a water heater, when the hot water tap 10 is throttled to reduce the flow rate, the pressure difference between the high and low pressure chambers of the water governor 1 becomes small, causing the gas valve to close, or as shown in Figure 3. As shown in the figure, if the primary water supply pressure increases, the flow rate will eventually reach around the maximum flow rate, regardless of the opening of the hot water tap, even though the hot water tap is closed. It was very difficult to adjust the amount of hot water stably using No. 10.

Therefore, in the present invention, since a constant pressure water governor 11 is arranged between the constant flow water governor 1 and the ventilate 7,
When the tip plug 10 is squeezed, the back pressure P applied to the valve part 13 of the valve body 12 increases, pushing up the valve body 12 and narrowing the opening of the water passage hole 14 to reduce the amount of water flowing. The same effect can be obtained as if a temperature regulator was installed and adjusted, and the amount of hot water is stabilized at each flow rate depending on the opening degree of the tip plug 10, as shown in FIG. Of course, bench yuri 7
Since the flow rate is throttled before the fire, the water pressure applied to the low pressure chamber 5 is maintained at a low pressure, and the differential pressure between the high pressure chamber 4 and the low pressure chamber 5 does not decrease, causing the gas valve to close and extinguish the fire. There isn't. Thus, Figure 2,
As is clear from a comparison of the water pressure-flow rate characteristic diagrams in Figure 3, the constant pressure water governor 11 acts over a wider range to control the flow rate to a constant level, regardless of the opening degree of the tap. A stable flow rate can be obtained depending on the opening degree of the tip of the water heater, and the flow rate control of the water heater can be improved.

As described above, in the present invention, a valve part that slides in response to water flow pressure is disposed on the secondary side of the water flow hole between a constant flow water governor and a ventilee that operates the constant flow water governor. At the same time, the valve part is equipped with a constant pressure water governor equipped with a spring that biases the water passage hole in the opening direction, so the flow rate can be stably varied as the hot water tap is narrowed down. This has the excellent effect of making it possible to control the temperature of the tip.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention;
FIG. 2 is a water pressure-flow characteristic diagram at various opening degrees of the stopper same as above, and FIG. 3 is a water pressure-flow characteristic diagram of a conventional product. 1... constant flow water governor, 7... bench lily,
11...Constant pressure water governor.

Claims (1)

[Scope of utility model registration request] Between the constant flow water governor and the ventilator that operates the constant flow water governor, a valve part that slides in response to water flow pressure is disposed on the secondary side of the water flow hole, and the valve part is connected to the water flow hole. A flow control device for a stop-start instantaneous water heater, which is equipped with a constant pressure water governor equipped with a spring that biases the water governor in the opening direction.