JPH045957Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a bus water heater that is installed inside a bus and used to boil water and serve passengers.

``Prior Art'' Conventional bath water heaters of this type have either a rectangular outer shape as shown in FIG. 5, or a round outer shape as shown in FIG. 6. In FIGS. 5 and 6, a lid 11 is attached to the top surface so as to be openable and closable, and a valve 12 for draining hot water is provided on the bottom surface.

In this way, two types of external shapes were mainly used, and for those with a rectangular external shape, the tank housed inside was also square, that is, a tank with a rectangular horizontal cross section was used. On the other hand, for those with a round external shape, the tank housed inside was also round, that is, a tank with a circular horizontal cross section was used.

In this way, it is necessary to make two types of tanks depending on their external shapes, which increases the overall price of the water heater. In addition, square tanks are required to be relatively thin with a rectangular cross section, and cleaning the inside of such a thin square tank is relatively difficult.

"Means for Solving the Problems" In this invention, the horizontal cross-sectional shape at any position of the tank housed inside is made into a substantially uniform ellipse.

Since the tank is elliptical in this way, it can be used for both square-shaped and round-shaped tanks, and there is no need to prepare two types of tanks.

``Example'' FIG. 1 shows a horizontal sectional view when this invention is applied to a device with a rectangular outer shape. That is, an oval tank 15 is housed within a vertical rectangular case 14. The case 14 is a rectangular tube whose upper and lower end surfaces are closed, and its horizontal cross section is rectangular. The tank 15 has an oval cylindrical shape, and the axis of the tank 15 and the case 1
4 axes are almost aligned. A heat insulating layer 16, for example glass wool, is wrapped around the outer peripheral surface of the tank 15. Fig. 2 shows a somewhat more concrete cross-section of the AA line in Fig. 1. A heating means 17 such as a heater is attached to the bottom surface of the bottom plate 15a of the tank 15. The tank 1 is connected to the partition plate 18 provided near the bottom plate 14a of the case 14 by means of metal fittings 19.
5 is held in a case 14.

A hole 21 is made in the center of the bottom plate 15a of the tank 15, one end of a drain pipe 22 is inserted and fixed into the hole 21, a valve 12 is installed in the middle of the drain pipe 22, and a knob 23 for opening and closing the valve 12 is connected to the case 14. It protrudes more outward. A hot water supply port 24 protrudes below the valve 12 from the case bottom plate 14a. The water placed in the tank 15 is heated by the heating means 17, but a temperature fuse 25 is installed near the heating means 17 to prevent abnormal heating.

An opening 26 is formed in the upper plate 14b of the case 14, and an opening 2 in the tank 15 is formed opposite to this opening 26.
7 is open. A pin 28 protrudes from the center of the inner surface of the lid 11 of the case, and an inner lid 29 is attached to the pin 28.
A packing 31 is attached to the peripheral edge of the inner cover 29, and a coil spring 32 is interposed between the cover 11 and the inner cover 29.
The peripheral edge of the tank opening 27 elastically suppresses the peripheral edge of the tank opening 27. A plurality of locking pieces 33 are fixed to protrude from the case top plate 14b onto the lid 11.
A protrusion 34 is attached to the circumferential surface of the case 11 so as to be freely removable and removable, and the protrusion 34 is always projected to the outside by a spring 35. When the lid 11 is covered with the case 14 and rotated, it is held by the locking piece 33. Then, the projection 34 is inserted into and engaged with the small hole formed in the peripheral wall of the opening 26, and the lid 11 is attached to the case 14. To remove the lid 11 from the case, the projection 34 can be removed from the small hole 35 by moving the knob 36 against the biasing force of the spring 35.

Figure 3 shows the lower part of the BB cross section in Figure 1. That is, when the water level gauge 41 is attached to the tank 15,
A cutout window 42 is formed at one corner of the case 14, and a water level gauge 41 is arranged to extend vertically, facing the cutout window 42. The upper end of the water level gauge 41 is the joint 43
The lower end of the water level gauge 41 communicates with the drain pipe 22 on the valve 12 through the connecting tube 44 through the heat insulating layer 16.

Oval tank 1 for case with vertical round shape
FIG. 4 shows an example in which 5 is accommodated. This tank 15
A heat insulating layer 16 is also wrapped around the outer circumferential surface of.
In this case, the water level gauge 41 is provided in a space provided between the tank 15 and the case 14, that is, at any position on the short axis of the tank 15 shown by the dotted line. As shown in FIG. 1 in the angle gauge case 14, a water level gauge may be provided at a corner indicated by a dotted line 41'. From this point of view, as shown in Figure 1, the tank is provided with a hole 45 for a water level gauge at one end of the short diameter, and similarly, a hole 45 for a water level gauge is provided at one end of the short diameter of the tank, corresponding to the two corners of the rectangular case shown in Figure 1. Each use hole 45 is provided, and only one of these is actually used, and the other two are closed.

``Effects of the invention'' As stated above, according to this invention, the tank is made oval, so it can be commonly used for both vertical square cases and round cases. , it is possible to make a water heater at a lower cost than if each round tank was made separately.
Moreover, as shown in the previous embodiment, since an oval tank is used, a small amount of space is created in both the square case and the round case, but this space can be effectively used for arranging a water level gauge, etc.

[Brief explanation of the drawing]

Fig. 1 is a horizontal sectional view of an example in which this invention is applied to a square case, Fig. 2 is a sectional view taken along line AA in Fig. 1, Fig. 3 is a view showing the lower part of the BB line sectional view in Fig. 1, and Fig. 4
The figure is a horizontal sectional view showing an example in which this invention is applied to a round case, FIG. 5 is a perspective view showing the outer shape of a square water heater, and FIG. 6 is a perspective view showing the outer shape of a round water heater.

Claims (1)

[Scope of claim for utility model registration] A tank is installed inside a bus and housed in a vertical square or round case, and water is poured into the tank, and the water inside the tank is heated by heating means installed at the bottom of the tank. A water heater for a bath that heats a water heater, wherein the tank has an oval shape with a horizontal cross section that is substantially uniform at any position.