JPS6027862Y2 - Hot water supply hopper for hot water bath kettle - Google Patents

Description

[Detailed description of the invention] This invention is a hot water supply type bathtub in which water or hot water heated by a water heater is dropped into the bathtub through the heat exchange circuit of the bathtub.
This relates to a hot water hopper that prevents dirty water from a bathtub from flowing back into city water, and is intended to reduce various noises caused by air being taken in during the water flow.

First, an example of a hot water supply type bath pot according to the present invention will be explained with reference to FIG. 1. 1 is a water heater, 2 is a bath heater;
A heat exchanger 3 constituting the bathtub is connected to a bathtub 5 via a circulation pipe 4.

In the heat exchanger 6 of the water heater 1, a hot water pipe 7 on the upstream side is connected to the city water supply, and a hot water pipe 8 on the downstream side is led to a hot water usage point.

A bath hot water supply pipe that communicates with the inside of the heat exchanger 3 of the bath heater 2 is branched from the middle of this hot water supply pipe, and the bath hot water supply pipe 9 is connected to a hot water supply valve 10 such as a solenoid valve that opens when hot water is poured in, and A hopper 11 for preventing backflow is provided below the hot water supply valve 10.

The hopper 11 is cylindrical and funnel-shaped, and is always in communication with the atmosphere through an overflow port 12 opened in the side wall, and serves as a barrier between city water and bath water.

13 is a discharge port 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, and a distance is placed between the lower end of the water inlet 14 and the upper end of the overflow port 12, making this part an open space 15 to the atmosphere.
This works to prevent cross connections.

Reference numeral 16 denotes a guide body provided facing the water inlet 14 in the space 15, which has a circular hole 17 with a smaller diameter than the water inlet 14 facing the water inlet 14 in the center, and an arc-shaped slit in the periphery. A hole 18 is provided on the bottom surface of the hopper 11 with a nozzle-shaped lower end extending from the periphery of the circular hole 17.
A nozzle cylinder 20 is vertically provided and faces directly above the discharge port 13 with a gap 19 between it and the inner wall.

Reference numeral 21 denotes a cylindrical partition wall that stands between the circular hole 17 and the slit hole 18 on the upper surface of the guide body 16, and its upper end is positioned slightly below the lower end of the water inlet 14.
A gap 22 through which hot water passes is formed above the partition wall 21.

In this configuration, the bath water supply pipe 9 is opened by opening the hot water supply valve 10.
The hot water flowing into the bathtub 5 passes through the hopper 11 and falls into the bathtub 5, but in the past, there was no guide body as in the present proposal, and the hot water spouted from the water inlet 14 directly fell into the outlet 13 with force. Therefore, air is easily drawn in at this time, and the water passes through the bath water supply pipe 9 with air still mixed in, producing the sound of water flowing and the noise of this mixed air turning into large bubbles and floating in the bathtub. was.

Furthermore, the water spouting from the water inlet 14 was falling with force onto the water surface in the bath water supply pipe 9, which was at the same level as the bathtub water surface, making a loud noise.

Therefore, in the present invention, in order to improve these problems, the guide body 16 is provided as described above. The flow is divided into a flow that overflows from the upper passage gap 22 and falls from the slit hole 18.

The water falling from the slit hole 18 falls in the form of a cylindrical curtain, and flows into the discharge port 13 so as to surround the rod-shaped water stream that is ejected from the circular hole 17 while being guided by the nozzle tube 20.

Of these, the one that is likely to entrain air as it ejects is the water flow from the nozzle tube 20, which ejects and falls with relatively little resistance. The water stream flows in a curtain shape and acts to separate the water stream from the nozzle tube 20 from the air near the overflow port 12, so that air is not taken into the water stream from the nozzle tube 20 to a large extent. This makes it possible to significantly reduce the water flow noise and the bubble separation noise in the bathtub, which are conventional.

Note that the flow ejected from the water inlet 14 is resisted by the small-diameter circular hole 17 and its force is weakened, and the flow from the slit hole 18 is weakened while passing over the partition wall 21, so the bath water supply pipe 9 The force of falling onto the water surface is greatly reduced compared to the conventional method, and the noise generated at the water surface can also be reduced.

As described above, according to the present invention, in the hopper installed to prevent dirty water from the bathtub from backflowing into city water, it is possible to greatly reduce the amount of air mixed in with the water injection flow, and to increase the force of the water injection. By alleviating this, the sound of running water emitted by a flow of air mixed with water, the noise when mixed air becomes bubbles in the bathtub and rises to the surface, and the noise when water falls on the falling surface can be significantly reduced. This has a great effect on making this type of hot water supply type bathtub quieter.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an example of a hot water supply type bath pot according to the present invention, FIG. 2 is a longitudinal cross-sectional view showing an embodiment of the main part of the present invention, and FIG. 3 is a plan view of a guide body. 2...Bath heater, 3...Heat exchanger,
Death...Hot water supply pipe, 9...Bath water supply pipe, 11
...Hopper, 12 ...Overflow port, 13
...Discharge port, 14...Water inlet, 16.
... Guide body, 17 ... Hole, 18 ...
...Slit hole.

Claims (1)

[Scope of utility model registration request] A hopper to prevent backflow installed in a bath water supply pipe that branches from the water supply pipe to the inside of the heat exchanger of the bath heater, and has a water inlet at the top, a discharge port at the bottom, and an overflow port on the side wall. The cylindrical hopper is characterized by having a hole in the center facing the water inlet and having a smaller diameter than the water inlet, and a guide body facing the water inlet and having a slit hole in the periphery. Hot water hopper for hot water bath kettle