JPH0230526Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a flow rate regulating device mainly used in water heaters.

(Prior Art) Conventionally, a deformable elastic ring and a core body inserted through the elastic ring are provided in a water passageway, and the gap between the elastic ring and the core body is reduced by deforming the elastic ring in accordance with the fluid pressure flowing in the water flow passageway. The flow rate adjustment device that narrows the
It is known from Publication No. -23059.

However, this system allows water to pass through a narrow gap between the elastic ring and the core body, so if this is applied to a water heater, for example, water accumulated in a heat exchanger, etc. can be drained to prevent freezing. However, there is an inconvenience that water remains in the area and freezes, making it impossible for water to flow into the water passage when used again.

(Problems to be Solved by the Invention) An object of the present invention is to provide a device that can prevent such freezing.

(Means for Solving the Problems) The present invention includes a deformable elastic ring and a center body inserted through the elastic ring in the water passage, and the pressure of the fluid flowing through the water passage of the elastic ring is In a flow rate regulating device that narrows the gap between the elastic ring and the core body by corresponding deformation, at least one of the elastic ring or the core body is moved away from the other when water is drained from the water passage.

(Example) An example of the present invention will be explained in the case of an instantaneous water heater.

Drawing 1 shows a water heat exchanger, 2 shows a heating part that heats the water heat exchanger 1, 3 shows a water passage connected to the water heat exchanger 1, and 4 shows a flow rate provided near the water supply pipe connection part of the water heat exchanger 3. The regulating device 5 indicates a water drain opening opened at the lower side of the flow regulating device 4, and 6 indicates a drain plug attached thereto.The flow regulating device 4 includes a deformable elastic ring 7 having a flat or circular cross section. and a center body 8 through which the elastic ring 7 is inserted, and the flow rate is adjusted by narrowing the gap between the elastic ring 7 and the center body 8 by deforming the elastic ring 7 according to the fluid pressure flowing in the water passage. This structure is not particularly different from that disclosed in Japanese Patent Publication No. 51-23059.

The present invention is such a flow regulating device 4 in which one of the elastic ring 7 and the core body 8 is moved in a direction away from the other, and the second one is moved away from the other.
3 and 3, the seat 9 of the elastic ring 7 is movably provided along the inner circumferential surface of the passageway 3, and the seat 9 is provided with a spring on the side that resists the water flow indicated by the arrow. 10, and when water is passed through, the water pressure causes the elastic ring 7 to approach the center body 8, that is, the center body 8
The center body 8 is held in the position shown in FIG. 3, surrounding the outer periphery of the center body, but when the water flow is cut off, it is moved by the spring 10 to a position away from the center body 8 shown in FIG. However, it goes without saying that the catch seat 9 can be moved in the direction away from the seat 9 by its own weight.

Incidentally, the core body 8 was supported within the water flow channel 3 via a thermoelent 11, so that the flow rate could also be adjusted depending on the water flow temperature. 12 is a screw for adjusting the distance between the core body 8 and the salmon cup 9. Fourth
6 to 6, the elastic ring 7 is fixed and the core body 8 is
An example is shown in which the side is moved,
The one shown in FIG.
3 protrudes, and the operating rod 13 moves the core body 8 in a direction away from the elastic ring 7 when draining water.

5 and 6, a shaft 14 is provided in the water passage 3, and a shaft 8 is provided along the shaft 14.
was provided to be slidable, and when water was passed through it, it was pushed by the water pressure and moved to a position approaching the elastic ring 7, as shown in FIG.

(Function) In this case, when draining water using the drain valve 6, the elastic ring 7 and the core body 8 are always separated, so water accumulates in that part and freezes both, and when the drain plug 6 is used again, the elastic ring 7 and the core body 8 are separated. Water will not be unable to flow through the waterway.

(Effect of the invention) As described above, according to the invention, the inconvenience of freezing of the flow rate regulating device can be avoided by simply moving either the elastic ring or the core body away from the other during water drainage. It has the effect of eliminating it.

[Brief explanation of the drawing]

Figure 1 is a side view showing one example of implementing the present invention;
The figure is an enlarged sectional view of the main part, FIG. 3 is a diagram of its operating state, and FIG. 4 is a sectional view of a part of its modification.
FIG. 5 is a cross-sectional view of a modified example, and FIG. 6 is a diagram showing an operating state. 3... Water passageway, 4... Flow rate adjustment device, 7... Elastic ring, 8... Core body.

Claims (1)

[Scope of utility model registration request] A deformable elastic ring and a center body inserted through the elastic ring are provided in the water passage, and the elastic ring is deformed in accordance with the pressure of the fluid flowing in the water flow passage, thereby narrowing the gap between the elastic ring and the core body. A flow rate regulating device in which either the elastic ring or the core body is moved in a direction away from the other at least when water is drained from the water flow channel.