JPH054501B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a hot water washer mainly used for cleaning the anus etc. after defecating in a toilet, and more specifically relates to the configuration of its hot water tank. be.

Configuration of conventional example and its problems For example, in the conventional hot water washer shown in FIG. Hot water is force-fed to the vicinity of the bottom of the hot water tank 7 and heated by a heater 8, and is ejected from a nozzle 10 via a hot water pipe 9.

Reference numeral 11 denotes a controller, which operates the solenoid valve 4 and the variable flow rate pump 5 using a knob 12. Reference numeral 13 is a vacuum break valve for releasing residual water from the tap water pipe 9 when the operation is stopped, and reference numeral 14 is a water outlet for drainage, which is closed by a stopcock 15.

The hot water tank 7 is equipped with other temperature control means, a temperature safety device, a float switch, etc., but these are not shown.

FIG. 2 is an enlarged sectional view showing a hot water tank, which has specifications of a hot water storage capacity of 1, a heater output of 850 W, hot water temperature control of 30 to 45°C, and a hot water jetting rate of 0.4 to 1/min.

In the standby state of such an indirect water supply hot water storage type hot water washing machine, the electromagnetic on-off valve 4 is closed, the variable flow pump 5 is stopped, the hot water tank 7 is full of water, and the heater 8 is kept at a constant temperature by the temperature control means. is maintained. Further, when the heater 8 is not used for a long time, the heater 8 may be turned off and placed in a dormant state. In winter in cold regions, freezing may occur in the hot water tank 7, so remove the stopcock 15 and open the water outlet 1.
Drain from 4. However, with this configuration, it takes some time to finish draining water, which is inconvenient for the user.

Next, as an important characteristic of the hot water storage type hot water tank 7,
There is a change in the tapping temperature, that is, an error response. Ideally, when cold water with a high specific gravity is pumped to the vicinity of the bottom of the hot water tank 7 and the hot water is pushed upwards, a temperature stratification phenomenon occurs, resulting in complete extrusion without mixing of hot water and cold water.

Figure 3 shows the transient response curve when hot water is continuously tapped.Curve A shows no drop in the hot water temperature until the hot water volume reaches 1000 ml when the hot water is completely extruded.

However, in the actual hot water tank 7, some mixing is unavoidable, and in the conventional example, the hot water temperature drops from about 800 ml as shown by curve B, reducing the user's pleasure.

This is because, in FIG. 2, part of the cold water pumped from the water inlet pipe 6 flows upward through the space between the heaters 8, but it hits the bottom of the hot water tank 7 and spreads toward the periphery. This is due to the strong entrainment flow α that bounces off the body surface of the body. Therefore, when hot water is continuously tapped, the amount of usable hot water at a constant temperature decreases, and the hot water temperature drops before the stored hot water is used up.
Significantly impairs the user's pleasure. Furthermore, if the depth of the hot water tank 7 is increased to compensate for this, there will be a problem in making the hot water washer compact, and it will also be disadvantageous in terms of cost.

Purpose of the invention The present invention solves the above-mentioned conventional problems.
To construct a hot water tank that can drain smoothly and quickly and has excellent transient response, and to increase the amount of constant-temperature usable hot water without being disadvantageous in terms of compactness or cost. purpose.

Structure of the Invention In order to achieve the above object, the hot water washer of the present invention has the following features:
A spiral rib is formed on the bottom of the hot water tank, and the water inlet pipe is opened above the center of the spiral.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below based on the drawings.

FIG. 4 is a longitudinal sectional view of the hot water tank, in which four spiral ribs 16 are formed on the bottom surface of the hot water tank 7a. The water inlet pipe 6 opens above the center of the vortex, and a water outlet 17 and a stopcock 18 are provided directly below it. Stopcock 1
The tip of number 8 protrudes from the bottom of the hot water tank in a chevron shape.

Figure 5 is a cross-sectional view showing the bottom of the hot water tank.
The expression of flow is when cold water is pumped.

The operation of the above configuration will be explained below.
When the stopper 18 is removed and the water drain port 17 is opened, water is drained as a left-handed swirling flow guided by the spiral rib 16 on the bottom of the hot water tank 7a. (In the opposite direction to the flow shown in FIG. 5) That is, it overlaps with the swirling action caused by the earth's rotation, and the drainage is completed smoothly and quickly.

Next, when the hot water washer enters the operating state from the standby state, the cold water pumped from the water inlet pipe 6 is supplied to the stop valve 18.
Since the water is separated at the tip and the direction is continuously changed by the spiral ribs 16, a swirling flow that advances toward the outer periphery and a diffusion flow that hits the spiral ribs 16 and advances upward are generated.

The cold water pumped from the water inlet pipe 6 in this manner pushes up the hot water in a generally uniform and slow upward flow across the cross section of the hot water tank, and there is very little entrainment flow.

Therefore, the mixing of cold water and hot water during tapping is reduced, the transient response is improved, and curve C in FIG. 3 is obtained.

In this way, according to this embodiment, when discharging hot water, a left-handed swirling flow is induced to make it smooth and quick, and when continuously dispensing hot water, a right-handed swirling flow is induced to disperse and homogenize the upward flow of cold water. It has the advantage of increasing the amount of hot water and having no effect on cost or compactness.

Effects of the Invention According to the present invention, the following effects can be obtained.

That is, the mixing of cold water and hot water in the hot water tank during operation is reduced, and the amount of constant-temperature usable hot water when hot water is continuously dispensed is increased, so that the user does not experience any loss of pleasure due to a drop in the dispensed hot water temperature.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing a conventional hot water washer, Fig. 2 is an enlarged sectional view of the same hot water tank, Fig. 3 is a comparison diagram of transient response of the hot water tank, and Fig. 4 is an embodiment of the present invention. FIG. 5 is a longitudinal cross-sectional view of a hot water tank showing an example, and FIG. 5 is a cross-sectional view showing the bottom surface of the hot water tank. 6... Water inlet pipe, 7a... Hot water tank, 8...
... Heater, 9 ... Hot water tap, 13 ... Vacuum break valve, 16 ... Spiral rib, 17 ... Water outlet, 18
...Stopcock.

Claims (1)

[Claims] 1. A toilet hot water washer in which one or more spiral ribs are formed on the bottom of a hot water tank having a hot water outlet pipe, a water inlet pipe is opened on the center of the spiral of the spiral ribs, and a heater is arranged near this opening. .