JPH04155154A - Boiler - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a storage type water heater, and in particular, an air layer is provided in the upper part of the water heater body that stores hot water, and the air layer is opened to the outside. This invention relates to an open storage type water heater.

``Prior art'' An open storage type water heater stores high-temperature water (for example, a fan at about 95°C) that is also used for drinking purposes, and supplies it as needed. There is.

This type of open-type storage water heater has a water heater body in which water is stored up to a predetermined height so as to have an air layer at the top, and a water heater that extends outward from above the predetermined height of the water heater body. The boiler is equipped with an extending overflow pipe, and the pressure inside the boiler body is released to the outside through the overflow pipe, and the boiler is heated to a predetermined level.

When rising, the internal hot water C is discharged to the outside through the overflow pipe.

[Problems to be Solved by the Invention] In the above-mentioned storage type water heater, steam is often discharged from the overflow pipe to the outside due to the high temperature of the stored hot water. There was a drawback that it made me feel impatient.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a water heater that prevents steam from being discharged to the outside through the Napa flow pipe and prevents the area around the boiler from becoming damp.

"Means for Solving the Problem" In the invention described in claim I, the inner end of the overflow pipe C is inserted with its tip below the hot water surface so that the inner end thereof faces downward, and
An open pipe is provided to open the air layer of the water heater body to the outside, and a cooling means is provided on the outer periphery of the open pipe.

In the invention recited in claim ZEE, in addition to the invention recited in claim 1, the open pipe is 11° higher than the overflow pipe.
The configuration is such that it can be set to the diameter.

In the invention according to claim 3, a cooling means is provided on the outer periphery of the overflow pipe which also serves as an open pipe.

) "Function" E In the invention described in claim 1, since the inner end of the overflow pipe is inserted below the hot water level, almost no steam is discharged from the overflow pipe. At this time,
Since the water heater body is open to the outside via the open pipe, the internal pressure of the water heater body does not rise or fall more than necessary.

Note that since the open tube has a cooling means on its outer periphery, the steam passing through the open tube is condensed and is not discharged outside as steam.

In the second aspect of the invention, the open pipe is set to have a smaller diameter than the overflow pipe, and the amount of steam discharged through the open pipe can be reduced accordingly. Note that the overflow pipe functions to discharge excess hot water or water to the outside, whereas the open pipe functions to maintain the internal pressure of the water heater constant, and gas flows through the pipe rather than liquid. Since the resistance is low, problems are unlikely to occur even if the open pipe is small.

In the third aspect of the invention, since the cooling means is provided on the outer periphery of the overflow pipe, the steam passing through the overflow pipe is condensed by the cooling means, and the steam is difficult to be directly discharged from the overflow pipe.

"Example" Embodiments of the present invention will be described below with reference to the drawings.

FIRST EMBODIMENT FIG. 1 is a diagram to which the present invention is applied! The storage type electric water heater which is an example is shown. In the figure, reference numeral 1 denotes a water heater body, and hot water (water) is stored therein to a predetermined height so as to have an air tank S at the top.

2 is an overflow pipe arranged inside the water heater main body l. The overflow pipe 2 passes through the bottom plate 1a of the water heater main body, rises into the water heater main body 1, has a curved inner end, and has its tip inserted under the water surface. The height of the curved portion of the overflow pipe 2 is set at the upper limit of the hot water level, and when the water level rises further, the hot water is discharged to the outside through the overflow pipe 2. The outer end of the overflow pipe 2 is arranged so that the upper part of the drain pipe 3 faces the tray part 4.

The air layer S of the water heater body X is an open pipe 5 passing through the cover plate 1b.
is open to the outside world. The open pipe 5 is set to have a smaller diameter than the overflow pipe 2. The open tube 5 is provided with a water cooling jacket 6 on the outer periphery of the rising portion, and the tip thereof is formed in a 0-shape. The water cooling jacket 6 is equipped with a temperature sensor inside, and when the inside temperature reaches a predetermined temperature or higher, a solenoid valve (not shown) installed in an exhaust pipe extending from the jacket is opened to lower the temperature inside the jacket 6 via a water supply pipe. In addition, water cooling jacket 6
A structure may be adopted in which the heated water inside is returned to the water heater main body l to recover heat. Note that in order to increase cooling efficiency, fins or the like may be provided on the outer periphery of the open tube 5 covered by the water-cooled jacket 6.

Reference numeral 7 denotes an electric heater, and during heating, the electric heater 7 detects any one of the sensors 7a to 7c disposed below the water surface in the water heater main body i, in the air layer S, and at the base end of the open pipe 5. When one sensor detects boiling (actually, when the sensor detects that the surrounding atmospheric temperature is higher than a predetermined temperature), it is controlled to be stopped after a predetermined period of time.

A supply pipe 8 passes through the bottom plate 1a of the water heater body 1, and is disposed such that the inner end of the supply pipe 8 is located at a predetermined depth below the water surface. A pressure pump lO5 check valve 11, a water flow detection switch 12, and a pressure switch 13 are provided in order from the proximal end of the supply pipe 8 in a portion of the supply pipe 8 that protrudes outward from the water heater main body l. This supply pipe 8 is swung up to a higher position than the water heater main body l, and a faucet 1 is attached to its tip.
4 is installed. Further, a controller 15 is interposed between the pressure pump lO and the switches 12, 13. The controller 15 turns on when either the signal from the water flow detection switch 12 or the signal from the pressure switch 13 is turned on (when it detects that the pressure in the supply pipe 8 has decreased, or when there is hot water in the supply pipe 8). ) is turned on when it detects that there is a flow.

Further, 17 is a water supply pipe that passes through the side of the water heater main body l, and a hole tap 18 is provided at the tip of the water supply pipe, so that water is replenished according to the amount of water used. When replenishing water, the water is supplied to the vicinity of the bottom of the water heater body l via the vertical pipe 19 so that the hot water at the top and the replenishment water do not intersect.

Note that as a water supply system, a solenoid valve may be provided in place of the pole tap 18, and the solenoid valve may be turned on and off by a sensor attached to a predetermined height position inside the water heater body 1.

According to the storage type water heater having the above configuration, an air layer S is provided at the upper part of the IIJ boiler main body l, and this air layer S
Since it is open to the atmosphere, the water stored in the water heater body 1 can be completely boiled, and hot water at a high temperature of around 100° C. can be supplied from the faucet 14.

The water supply to the field is performed by opening the faucet 14, or at this time, as hot water is discharged from the faucet 14, the pressure in the supply pipe 8 decreases and the pressure switch 3 is turned on, and based on this, pressure is supplied. The pop lO becomes operational. Thereby, hot water supply from the faucet 14 is continued.

When the faucet 14 is turned down, the pressure inside the supply pipe 8 temporarily increases and the pressure switch 13 is turned off, but the flow rate detection switch 12
remains off, so the pressure pump 10 continues to operate. Therefore, stable hot water is supplied from the faucet 14. Note that when the flow rate detection switch 12 is not provided,
The pressure inside the supply pipe 8 changes due to the throttle adjustment of the faucet 14, and the pressure switch 13 detects this and turns the pressure pump 10 on and off in a very short period of time, causing the amount of hot water supplied from the faucet 14 to become unstable. Although there is a possibility that a problem may occur, such a problem does not occur in this embodiment.

As the temperature inside the water heater rises, evaporation occurs internally,
The generated steam attempts to be discharged to the outside via the overflow pipe 2 and the like. However, the inner end of the overflow pipe 2 is inserted below the hot water level, and due to the difference in evaporation area, the steam generated within the water heater body 1 is not sufficiently discharged from the overflow pipe 2. In addition, the diameter of the open pipe 5 is set smaller than the diameter of the overflow pipe 2, and a water cooling jacket 6 is provided around the outer periphery of the open pipe 5, which condenses the steam that is about to be discharged and boils the water. Although the steam is returned to the inside of the vessel body 1, the steam is not discharged to the outside from the open pipe 5 either. Therefore, with this water heater, steam is not discharged to the outside and the surrounding area is not damp.

Second Embodiment FIG. 2 shows a second embodiment of the present invention. The difference between this embodiment and the first embodiment described above is that the overflow pipe 2
This is because it is provided so as to pass through the side part 1b of the water heater body l instead of the bottom part 1a. Accordingly, a drain pipe 3 is connected to the outer end of the overflow pipe 2. In this embodiment, the same components as those in the first embodiment described above are given the same reference numerals.

In the case of this embodiment as well, almost no steam is discharged from the overflow pipe 2, which prevents the area around the water heater from getting damp, and also reduces the capacity of the water heater body l compared to the first embodiment. Benefits that can be increased.

Third Embodiment FIG. 3 shows a third embodiment of the present invention. The feature of this embodiment is that the overflow pipe 2 that passes through the bottom plate lλ of the water heater body 1 has this function without using an open pipe, and that The point is that a water cooling jacket 6 is provided on the part that protrudes.

That is, the upper end of the overflow pipe 2 remains upright without being bent and opens into the upper air layer S of the water heater body 1, and the air layer S is opened to the outside via the overflow pipe 2. It should be noted that in this embodiment as well, the same components as in the above-described embodiment are given the same reference numerals.

In the case of this embodiment, the steam generated within the water heater body i tries to be discharged to the outside through the overflow pipe 2, but the steam is cooled by the water cooling jacket 6 at the lower end of the overflow pipe 2 and condensed. , since it is discharged in the form of water droplets,
Steam is not discharged to the outside through the overflow pipe 2.

Fourth Embodiment FIG. 4 shows a fourth embodiment of the present invention. A feature of this embodiment is that the overflow pipe 2 used in the third embodiment is provided so as to pass through the side portion 1c of the water heater main body l instead of the bottom plate 1a. Connect the inner end of the overflow pipe 2 to the water heater body l.
opening into the upper air layer S of the water heater body 1.
This is similar to the third embodiment in that the drain pipe 3 is connected to the outwardly projecting end of the drain pipe 3.

This embodiment also provides the same effects as the third embodiment described above.

In each of the above embodiments, the water-cooled jacket 6 is used as the cooling means provided on the outer periphery of the open pipe 5 or the overflow pipe 2.
However, the present invention is not limited to this, and it is also possible to simply provide heat radiation fins on the outer periphery of these tubes, or to utilize the Peltier effect.

"Effects of the Invention" According to the invention as claimed in claim 1, since the inner tip of the overflow pipe is inserted below the hot water level, almost no steam is discharged from the overflow pipe, and moreover, the water heater body is not discharged through the open pipe. Since it is open to the outside, it is possible to prevent the internal pressure of the 7#1 boiler body from rising or falling more than necessary. Further, since the steam passing through the open pipe is cooled and condensed by the cooling means on the outer periphery, the steam is not discharged to the outside even through the open pipe.

In the second aspect of the invention, since the open pipe is set to have a smaller diameter than the overflow pipe, the amount of steam discharged through the open pipe can be reduced accordingly. Note that since gas mainly passes through the open pipe, there is almost no effect even if the diameter is small.

In the invention of claim 3, since the steam passing through the overflow pipe is cooled and condensed by the cooling means, no steam is discharged from the overflow pipe.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a schematic configuration of a first embodiment of the present invention;
2 is a sectional view showing a second embodiment of the present invention, FIG. 3 is a sectional view showing a third embodiment of the present invention, and FIG. 4 is a sectional view showing a fourth embodiment of the present invention.
It is a sectional view showing an example. l... - Water heater body, 2... Overflow discharge pipe, 3... Drain pipe, 5... Open pipe, 6. Water cooling jacket (cooling means), S... Air layer.

Claims (1)

[Scope of Claims] 1) A water heater body that stores hot water up to a predetermined height so as to have an air layer in the upper part, and a water heater body that extends outward from above the predetermined water surface height of the water heater body. In a water heater equipped with an overflow pipe, the inner end of the overflow pipe is inserted with its tip under the hot water surface so that its inner end faces downward, and an open pipe is provided to open the air layer of the water heater body to the outside. 1. A water heater characterized in that a cooling means is provided on the outer periphery of the open pipe. 2) The water heater according to claim 2, wherein the open pipe is set to have a smaller diameter than the overflow pipe. 3) A water heater body that stores hot water up to a predetermined height so as to have an air layer at the top, and an overflow pipe that extends outward from above the predetermined height of the water heater body. A water heater, characterized in that a cooling means is provided on the outer periphery of the overflow pipe.