JPH0519705Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention mainly relates to an instantaneous water heater.

(Prior Art) Conventionally, as shown in FIG. 5, a hot water outlet pipe 2 connected to a water heater main body 1 is composed of an elbow-shaped rigid pipe 2a and a flexible pipe 2b following this, and the tip of the flexible pipe 2b is It is known to have a tap hole 4 formed therein, and since the tap pipe 2 is generally made of a metal pipe, there is a risk of getting burned if you touch it.

For this reason, it is also known that the tapping pipe 2 is covered with a bellows pipe made of resin.

(Problem that the invention aims to solve) However, in the case of mainly stop-type instantaneous water heaters, the bend of the elbow-shaped rigid pipe 2a is made slightly less than 90 degrees because it is necessary to prevent as much as possible the dripping after the hot water has stopped dispensing. small example
The temperature of the elbow-shaped rigid pipe 2a should be set to about 85 degrees, and if used in cold regions, the bend of the elbow-shaped rigid pipe 2a should be slightly less than 90 degrees to prevent problems caused by water remaining in the hot water outlet pipe 2 and freezing. It is set to a large angle, for example around 95 degrees.

That is, since the elbow-shaped rigid pipe 2a is provided on the root side of the tap water tap 2 so that the user cannot freely change the bending angle, when the tap pipe 2 is covered with a bellows pipe 6 made of resin, the bellows If the pipe 6 has a deep valley depth, it will not only be highly flexible and easy to fit into the elbow-shaped rigid pipe 2a, but also prevent bending parts from becoming fatigued and damaged even after long-term use. Although this is advantageous, if the resin bellows tube 6 gets dirty, it becomes difficult to clean it, especially to wipe off the dirt at the bottom of the bellows tube 6.

That is, in this type of water heater, in order to change the position of the tap water outlet 4, the position of the hot water tap 2 is changed by pinching the hot water tap near the hot water tap 4 by hand, so this part is particularly easily contaminated with dirt from hands, etc., and is often wiped off. etc., but
As mentioned above, if the bellows tube 6 is made to have deep valleys that are easy to bend, it becomes particularly difficult to wipe off the valleys.

The purpose of the present invention is to obtain an instantaneous water heater free of such defects.

(Means for Solving the Problems) In order to achieve the above object, the present invention consists of a hot water outlet pipe connected to the water heater main body, consisting of an elbow-shaped rigid pipe and a flexible pipe connected to the elbow-shaped rigid pipe. In the case where a tap hole is formed at the tip of a flexible pipe and the tap pipe is covered with a bellows pipe made of resin, the valley depth of the portion of the bellows pipe that covers the elbow-shaped rigid pipe is adjustable. It is made deeper than the part that covers the flexible tube.

(Function) When crimping, the elbow-shaped rigid tube portion is covered with a portion where the valley depth of the portion of the accordion tube that covers the elbow-shaped rigid tube is deeper than the portion that covers the flexible tube, and the flexible elbow-shaped rigid tube portion is covered. It is only necessary to cover the flexible pipe portion with a portion where the depth of the valley covering the flexible pipe is lower than this, and with this, the portion of the tapping pipe that is bent by the elbow-shaped rigid pipe becomes fatigued. Moreover, since the easily soiled part is formed as a shallow valley compared to the part covering the elbow-shaped rigid tube part, cleaning such as wiping can be performed relatively easily.

(Example) An example of implementing the present invention will be explained using a stop type instantaneous water heater.

In the drawing, 1 indicates the water heater main body, 2 indicates a hot water outlet pipe protruding from the bottom surface thereof, and the hot water outlet pipe 2 is connected to the lower end of a connecting pipe 3 connected to a heat exchanger (not shown) in the water heater main body 1. It consists of an elbow-shaped rigid tube 2a and a flexible tube 2b following it, and a tap hole 4 is formed at the tip of the flexible tube 2b. A shower head 5 provided at the tip of the pipe 2b
was formed.

In the present invention, the tapping pipe 2 is covered with a bellows pipe 6 made of polypropylene or other resin, and the valley depth l ₁ of one end portion 6a of the bellows pipe 6 is the same as the valley depth of the other portion 6b. It is deeper than L ₂ ,
To explain this in detail, as shown in FIGS. 2 to 4, one end 6a of the bellows tube 6
is formed into a bellows with an outer diameter of 20 mm and a valley depth _l1 of approximately 3 mm, and the other portion 6b has an outer diameter of 17 mm.
mm, with a flat part at the bottom and a semicircular bellows shape at the top with a valley depth _l2 of about 1.5 mm.

For example, with the shower head 5 removed, the bellows pipe 6 is inserted into the hot water tap pipe 2 sequentially with its one end 6a first.
be fitted into. In this way, the elbow-shaped rigid tube 2a can also be easily fitted since the valley is deep.

In the illustrated example, the tapping pipe 2 is provided at the lower end of the connecting pipe 3 so as to be able to swing freely, but this is not always necessary.

The illustrated example shows a so-called stop-start type in which a water valve (not shown) opens and taps hot water at the same time as an internal gas burner (not shown) is ignited by operating the operating knob 7, but the invention is not limited to this. Furthermore, the hot water outlet pipe 2 is not limited to a type that directly protrudes from the water heater main body 1.

(Effect of the invention) In this way, according to the invention, the resin bellows pipe that covers the tap water tap has a deeper valley depth on the elbow-shaped rigid pipe side than the part that covers the flexible pipe. The deep part of the valley can cover the elbow-shaped rigid tube, and since this part has good flexibility, the resin bellows tube will not suffer undue fatigue.
In addition, since the portion covering the flexible tube, which is relatively easily soiled, has a lower valley depth, it is easier to wipe or otherwise clean if it becomes dirty.

[Brief explanation of the drawing]

In the drawings, Fig. 1 is a side view of one example of the implementation of the present invention, Fig. 2 is a side view of the bellows tube, Figs. 3 and 4 are enlarged views of a part thereof, and Fig. 5 is a view before the bellows tube is installed. FIG. 1... Water boiler body, 2... Hot water outlet pipe, 2a... Elbow-shaped rigid pipe, so-called... hot water outlet, 6... Bellows pipe, 6
a...One end.

Claims (1)

[Scope of utility model registration request] The hot water tap connected to the main body of the water heater is composed of an elbow-shaped steel pipe and a flexible pipe connected to the elbow-shaped steel pipe, and a hot water tap is formed at the tip of the flexible pipe, and the hot water tap is connected to a resin bellows. 1. A water heater which is covered with a pipe, and the valley depth of the portion of the bellows pipe that covers the elbow-shaped steel pipe is deeper than that of the portion that covers the flexible pipe.