JPH0461256B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to hot water baths, etc., in which water or hot water heated by a water heater is dropped into the bathtub through the bathtub's heat exchanger or circulation pipe. This invention relates to a hot water supply hopper device that prevents backflow of hot water.

BACKGROUND ART A conventional hot water hopper device of this type has a water inlet 22 at the top and a discharge port 2 at the bottom, as shown in FIG.
3, each having an overflow port 24 on the side wall,
A cylindrical guide body 25 facing the water inlet 22 in the center
has been established.

A part of the water flowing out from the water inlet 22 flows inside the guide body 25, and the other flowing water flows inside the guide body 25.
It passed between the outside of the guide body 25 and the hopper inner wall 26 and fell into the bath water supply pipe 27. (For example, Publication of Utility Model Publication No. 60-27862) Problems to be Solved by the Invention However, with the above configuration, when stopping the dropping into the bathtub when the vertical distance between the bathtub water surface and the hopper is short, the dropping is difficult. Since the force pushing down the water level in the bath water supply pipe 27 generated by the discharge pressure decreases rapidly, the hot water in the bath water supply pipe flows backwards, and the water level in the bath water supply pipe 27 temporarily rises, causing the water to flow out from the overflow port 24. There was a problem with water injection overflowing.

The causes of the above-mentioned backflow are that the hot water itself flows backward due to a sudden decrease in the pushing force into the hot water in the bath hot water supply pipe when the pouring is stopped, and that the air bubbles contained in the hot water mixed in by the hopper There is a draft force due to floating on the water surface inside the pipe.

The present invention solves such conventional problems,
To prevent the backflow of hot water in a bath hot water supply pipe when pouring is stopped, and to make the water level in the bath hot water supply pipe lower than the overflow port.

Means for Solving the Problems In order to solve the above problems, the hot water hopper device of the present invention has a water inlet at the upper end and an outlet at the lower end.
Equipped with a hopper with an overflow port on the side wall,
This nozzle is installed inside the hopper and has an inlet at the center facing the water inlet and an outlet at the lower end. Vertical fins are provided on the outer periphery of the nozzle between the nozzle and the inside of the hopper.

Effects The present invention has the following effects due to the above-described configuration.

The vertical fins installed on the outer periphery of the nozzle break the air bubbles in the hot water mixed in from the hopper into small pieces when the drop stops and when they float in the bath water supply pipe, reducing the draft of air bubbles into the surrounding hot water. At the same time, the fins also act as resistance to the hot water itself flowing back.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

In FIG. 1, 1 is a water heater, 2 is a bath heater, and a heat exchanger 3 constituting the bath heater 2.
is connected to the bathtub 5 via a circulation pipe 4.
A water supply pipe 7 on the upstream side of the heat exchanger 6 of the water heater 1 is connected to the city water supply, and a water supply pipe 8 on the downstream side is led to a hot water usage area. This hot water pipe 8
A bath water supply pipe that communicates with the inside of the heat exchanger 3 of the bath heater 2 branches from the middle of the bath water supply pipe 9A, and the bath water supply pipe 9A has a hot water supply valve 10 that opens when hot water is poured in, and a backflow prevention valve below the hot water supply valve 10. A hopper 11 for cutting the edge of water is provided. The hopper 11 has a cylindrical, funnel-like shape, and is always in communication with the atmosphere via an overflow 12 opened in the side wall, thereby separating the municipal water supply from the bath water.

FIG. 2 is a sectional view of the hopper, FIG. 3 is a side view of the nozzle inside the hopper, and FIG. 4 is a bottom view of the nozzle. 13 is a discharge port provided at the lower end of the hopper 11. Reference numeral 14 denotes a water inlet for dropping hot water from the hot water supply valve 10 into the hopper 11. A distance is placed between the lower end of the water inlet 14 and the upper end of the overflow 12, and that part is defined as a space 15 open to the atmosphere. It is used to cut ties with people. Reference numeral 16 designates a nozzle provided facing the water inlet 14 in the empty angle 15, with a nozzle inlet 17 having a larger diameter than the water inlet 14 facing the water inlet 14 in the center, and a nozzle inlet 17 having a smaller diameter than the water inlet 14 at the lower end. A nozzle outlet 18 is provided. Further, four vertical fins 20 are provided on the outer peripheral surface 19 of the nozzle 16 in a radial manner between the hopper inner wall 21 and the hopper inner wall 21. Note that the fins 20 may be provided on the hopper inner wall 21 side.

In the above configuration, the water surface in the bath water supply pipe 9B is
During static pressure, that is, when the water injection flow rate is zero, the water level is at the same level as the water surface in the bathtub 5, and during dynamic pressure, that is, when water is poured, the water level in the bath hot water supply pipe 9B is lower than the bath water surface due to the drop pressure into the hopper 11. becomes lower,
maintain equilibrium. And when you stop dropping,
As the above-mentioned equilibrium is disrupted, the hot water in the bath hot water supply pipe 9B temporarily flows backward. What promotes this backflow is the draft force caused by air being mixed into the hot water and water by the jet effect of the air nozzle 16 supplied from the overflow port 12, forming bubbles, and floating in the bath hot water supply pipe 9B. However, in the present invention, the above-mentioned bubbles are divided into small pieces by the vertical fins 20 provided on the nozzle outer peripheral surface 19.
The draft force that causes backflow is reduced, and there is also resistance to the hot water itself flowing back.

Therefore, when dropping is stopped when the vertical distance between the water surface of the bathtub 5 and the hopper 11 is short, backflow is reduced and there is an effect that hot water does not overflow from the overflow 12.

Effects of the Invention As described above, according to the present invention, backflow can be prevented when dropping is stopped when the vertical distance between the water surface of the water tank such as a bathtub and the hopper is short, and hot water from the overflow port can be prevented. Effective in preventing overflow. Therefore, for example, the total height of this type of hot water supply type bathtub can be designed to be low, and the degree of freedom in the installation conditions with the bathtub can be increased.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a hot water supply type bathtub employing an embodiment of the present invention, Fig. 2 is an enlarged sectional view of essential parts of an embodiment of the present invention, and Fig. 3 is a side view of the same nozzle. FIG. 4 is a bottom view of the same nozzle, and FIG. 5 is an enlarged sectional view of a conventional hopper. 11...hopper, 12...overflow port, 13...discharge port, 14...water inlet, 16...
Nozzle, 17... Nozzle inlet, 18... Nozzle outlet, 19... Nozzle outer periphery, 20... Fin.

Claims (1)

[Claims] 1. A cylindrical hopper with an overflow port on the side wall is provided, with a lower end outlet connected to the water tank such as a bathtub, and an upper water inlet connected to the city water supply, and a water inlet and a water inlet in the center of the hopper. A hot water supply hopper device such as a hot water supply type bath kettle, which is provided with a nozzle having an opposite inlet and an outlet at the lower end, and has vertical fins provided on the outer periphery of the nozzle between the inside of the hopper and the inside of the hopper.