JPH0137014Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a water tank having a vacuum breaker.

In the case of a cleaning device that is directly connected to a water pipe and uses tap water for cleaning, a vacuum breaker is required as a means to prevent the water in the cleaning device from flowing back into the water pipe. This vacuum breaker consists of a valve hole and a valve that is held within the valve hole and moves in a vertical direction.The center of the valve protrudes like a brim, the upper surface of which serves as a seat surface, and comes into contact with the lower end surface of the valve hole. When water is supplied from the water pipe, the valve is pushed upward by water pressure, and the lower end surface of the valve hole contacts the seat surface of the valve, closing the valve. When the water supply stops, the valve is pushed downward by gravity. As a result, the lower end surface of the valve hole and the seat surface are separated and the water supply pipe communicates with the atmosphere. Conventionally, in water tanks using this type of vacuum breaker, there has been a risk that water droplets may leak into the atmosphere through the valve hole when the valve is opened or closed due to the way water flows around the valve. There was a risk that the water leaking out of the tank could damage electrical parts such as the hot water tank.

The present invention provides a water tank that overcomes these disadvantages.

The water tank of the present invention includes a container-shaped case and a tank housed in the case and having a vacuum breaker on the upper part, wherein the movable valve of the vacuum breaker is connected to the upper wall of the tank. is inserted and held in the valve hole that penetrates the
A bank-like projection surrounding the valve hole is formed on the upper surface of the upper wall, and a bank-like projection surrounding the movable valve is formed on the lower surface of the upper wall of the case facing the bank-like projection. A downward bank-like protrusion is formed that projects inside the tank, and the bank-like protrusion of the tank and the case are overlapped in the height direction, and the radial gap between the two bank-like protrusions is The tank is characterized by a small gap in the height direction between the tank upper wall surface and the tip of the bank-like projection of the case.

In the water tank of the present invention, a bank-like protrusion is formed on the top surface of the tank in which the movable valve of the vacuum breaker is installed, and the water splashed from the valve hole is stored in this bank-like protrusion, and the valve hole is closed again. The water is returned to the tank through the tank. This reduces the possibility of water splashing outside the tank even if water leaks from the valve hole. Furthermore, a bank-like protrusion is formed on the inner lower surface of the case corresponding to the valve so as to extend downward and surround the valve.
The bank-like projection surrounds the valve hole and projects into the space inside the bank-like projection formed on the upper surface of the tank.
Therefore, even if there are water droplets that become splashed from the valve hole into the surrounding gas due to the flow of water, etc., they will fall downward by hitting the embankment-like protrusion formed on the lower surface of the inner side of the case, and the valve hole will fall. Collects on the surface of the upper wall of the tank. In addition, on the upper surface of the tank's upper wall, a bank-like protrusion surrounding the valve hole is formed on the outside of the case's bank-like protrusion. It can be returned into the tank through the valve hole in the upper wall of the tank without leaking to the outside. Additionally, water vapor may scatter from the valve hole from the hot water tank when not being cleaned. However, this water vapor hits a bank-like protrusion formed on the case, is cooled while traveling along the inner surface of the protrusion, and drips onto the tank upper wall surface. This ensures that water comes out from the valve hole.
This prevents droplets, water vapor, etc. from scattering outside the tank, and allows them to be collected back into the tank through the valve hole.

In the water tank of the present invention, the bank-like protrusions for collecting water coming out of the valve hole are integrally formed with the members constituting the tank and the member constituting the case, respectively. Therefore, there are no problems such as an increase in the number of parts or an increase in the number of man-hours required to assemble the water tank. This can be achieved by processing the molds used for manufacturing tanks and cases to form the bank-like protrusions, and the great effect of preventing water scattering can be obtained with a small number of processing steps.

Additionally, water tanks are usually equipped with electrical components such as heaters and thermostats to control hot water, but with this invention, water or droplets coming out of the valve hole can be prevented from scattering outside the tank. can be prevented. Therefore, it is necessary to prevent the risk of electric shock to the human body due to current leakage caused by water adhering to the electrical parts, as well as the occurrence of conduction problems due to rust on the terminals of electrical parts, etc. This has the effect of increasing the safety and reliability of the cleaning device.

Examples will be explained below.

FIG. 1 shows a central sectional view of the water tank of the present invention. This water tank is used as a hot water tank for a shower toilet, and its main components include a box-shaped case 1 made of resin and a hot water tank 2 also made of resin. Case 1 is
An upper part 11 made of resin with a downward opening and a lower part 1 constituting a lower cover made of a steel plate fixed to the lower side of the upper part 11 with screws.
Consists of 2. The hot water tank 2 is housed within this case, and is caulked and fixed to the lower part 12 of the case 1. The hot water tank 2 includes a lid body 21 made of resin and a container body 2 also made of resin.
2, and is fixed with a screw 222 with a sheet 221 interposed between the two. A water supply hole 211 for supplying water from the water pipe 5 is formed in the lid body 21, and an outlet end 211a of the water supply hole 211 opens upward, and a valve chamber 212 is formed therein. The valve chamber 212 is formed by the upper surface of the lid 21 and the lower surface of a valve lid 214 that is watertightly fixed to the lid 21 with an O-ring 213. Valve lid 2
14 is provided with a valve hole 215 that is perforated in the vertical direction. Furthermore, a bank-like projection 217 is formed on the upper surface of the valve lid 214 so as to surround the valve hole 215, and a recess 218 is formed therein. Note that case 1 corresponding to this recess 218
A bank-like protrusion 111 that projects into the recess 218 is formed on the lower surface of the upper portion 11 of the recess 218 . valve 216
As shown in plan views in FIGS. 1 and 2, the valve has an inverted T-shape in cross section and consists of a flange-shaped valve portion 216a protruding from the outer peripheral surface at the lower end and a pillar portion 216b at the upper end. This valve 216 has a pillar portion 216 at the upper end.
Along the axial direction b, a cross-shaped groove is formed in the valve part 21.
It is formed up to the upper end of 6a. Also, the valve part 2
The upper surface of 16a becomes the sheet surface. This valve 21
6 is inserted into the valve hole 215 of the valve cover 214. In the lower lid body 21 of the valve chamber 212,
A tank inlet 219 is formed, and the tank inlet 219
It opens into a tank chamber 223 at the lower end of the tank.
The lid body 21 also has two terminals 31 of the heater 3,
32 is fixed in a watertight manner via an O-ring. A nozzle 4 that spouts water from the tank chamber 223 is fixed to the lower side of the container body 2. This nozzle 4 passes through a through hole provided on the side surface of the case 1 and projects into the toilet bowl (not shown).

In the water tank of this device, tap water supplied from the water pipe 5 passes through the water supply hole 211, pushes up the valve 216, and the upper surface sheet of the valve portion 216a comes into contact with the lower end of the valve hole 215 of the valve cover 214. , cutting off communication between the valve chamber 212 and the outside air. Then, water is supplied to the valve chamber 21 from the water supply hole 211.
2 and further through the tank inlet 219.
It flows into the tank chamber 223. At this time, valve 2
Even if water is discharged from the valve hole 215 to the outside of the tank 2 due to vibration etc. in case 1
The water droplets come into contact with the inner peripheral surface of the bank-like projection 111 provided on the upper part 11 of the valve lid 214, and the water droplets form on the bank-like projection 2 of the valve lid 214.
It falls into the recess 218 of No. 17 and accumulates in this recess 218. This accumulated water then returns to the valve chamber 212 through the valve hole 215 when the water supply from the water pipe 5 is stopped, the valve 216 falls down due to its gravity, and the valve hole 215 opens. or,
It returns to the tank chamber 223 through the tank inlet 219.

Therefore, in the water tank of this embodiment, the water or water droplets that jump out of the valve hole 215 reliably flow into the tank 223 through the valve hole 215, so there is very little risk of water leaking out of the tank. In addition, in this device, a bank-like protrusion 217 is provided on the upper surface of the valve lid 214 and the inner surface of the case, respectively.
111, it is possible to do this by simply changing the shape of the case without requiring any special parts. Such a simple shape can easily prevent water from leaking from the tank.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a water tank according to an embodiment of the present invention, and FIG. 2 is a plan view of a valve used in the water tank of FIG. DESCRIPTION OF SYMBOLS 1... Case, 2... Water tank, 3... Hot water heater, 215... Valve hole, 216... Valve, 111, 217... Embankment-like projection, 218... Recessed part.

Claims (1)

[Scope of Claim for Utility Model Registration] A water tank comprising a container-shaped case and a tank housed in the case and having a vacuum breaker at the top, wherein the movable valve of the vacuum breaker is connected to the upper wall of the tank. It is inserted and held in a valve hole that penetrates the body,
A bank-like projection surrounding the valve hole is formed on the upper surface of the upper wall, and a bank-like projection surrounding the movable valve and of the tank is formed on the lower surface of the upper wall of the case facing the bank-like projection. A downward levee-like protrusion protruding inward is formed, and the levee-like protrusion of the tank and the levee-like protrusion of the case overlap in the height direction,
A water tank characterized in that the radial gap between the two bank-like protrusions and the height gap between the tank upper wall surface and the tip of the bank-like protrusion of the case are small.