JPH04155153A - Boiler - Google Patents

Abstract

PURPOSE:To prevent steam from being discharged outside for preventing the surrounding of a boiler from getting damp by providing a cooling device around a pressure relief pipe. CONSTITUTION:An end of an relief pipe 2 is attached at the upper part on the side shell of a boiler water tank 1, facing an air zone S, and the tip of the relief pipe 2 slants down toward a receiving tray 4 on a drain pipe 3. A water-cooled jacket 5 is provided around the circumference of an L-shaped bend 2a of the relief pipe 2. When the temperature in the boiler water tank 1 rises and steam is generated, the steam is discharged outside through the relief pipe 2, however, the steam in the relief pipe 2 is cooled and condensed by the water-cooled jacket 5 provided around the relief pipe 2, and the condensate is discharged outside through the drain pipe 3. Therefore, steam is not discharged outside from the boiler and the surrounding of the boiler is prevented from getting damp.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a storage water heater, and more particularly to an open type storage water heater in which internal pressure is released through an open pipe.

[Conventional technology j Some open-type storage water heaters store high-temperature water (e.g., hot water at about 95°C) that is also used for drinking purposes, and supply it as needed. .

In this type of open storage water heater, an air layer is usually provided at the top of the water heater body that stores hot water, and the air layer is opened to the outside through an open pipe. There is.

[Problems to be Solved by the Invention] In the above-mentioned storage type water heater, steam is often discharged to the outside from the open pipe, partly because the temperature of the stored hot water is high, and the area around the water heater is It had the disadvantage of being damp.

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 and prevents the area around the water heater from becoming damp.

"Means for Solving the Problems" In order to achieve the above object, the present invention has a configuration in which a cooling means is provided on the outer periphery of the pressure relief tube.

"Function" When the steam in the air layer of the water heater passes through the pressure release pipe,
It is cooled and condensed into water by the cooling means on the outer periphery. Therefore, no steam is discharged from the pressure relief tube.

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

First Embodiment FIG. 1 shows a storage type electric water heater as a first embodiment to which the present invention is applied. In the figure, reference numeral 1 denotes a boiler water tank, and water (hot water) is stored inside with an air tank S at the top.

The proximal end side of an open pipe 2 is attached to the upper part of the water heater water tank 1 on the side facing the air layer S, and the tip of the open pipe 2 is connected to the upper part of the drain pipe 3 so that the upper part of the drain pipe 3 faces toward the dish part 4. It is arranged as follows.

A water-cooled cage 5 is provided on the outer periphery of the bent portion 2a of the open tube 2 which is bent into a 5-shape. The water cooling jacket 5 is provided with a temperature sensor inside, and when the inside temperature reaches a predetermined temperature or higher, a solenoid valve (path shown in the figure) is installed in the exhaust pipe extending from the water cooling jacket 5.
The jacket 5 may be opened to replace the water in the jacket 5, and if the warmed water in the water-cooled jacket 5 is used to replenish the water tank 1 of the water heater, heat can be recovered. In addition, in order to increase cooling efficiency, water cooling jar 1
Fins may be provided on the outer periphery of the open tube 2 covered by the kerato 5.

Reference numeral 6 denotes an electric heater, and during heating, the electric heater 6 activates any one of the sensors 7a to 7c disposed below the water surface in the water heater water tank 1, in the air layer S, and at the base end of the open pipe 2. 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 of the water heater water tank 1 and is disposed such that its tip is located at a predetermined depth below the water surface. A pressure pump 10, a check valve 11, a water flow detection switch 12, and a pressure switch 13 are provided in order from the base end of the supply pipe 80 at a portion of the supply pipe 8 that protrudes outward from the water heater water tank 1. , Furthermore, this supply pipe 8 is connected to the water heater water tank 1
It is swung up to a higher position and a faucet 14 is attached to its tip. Further, a controller 15 is interposed between the pressure pump 10 and both switches 2f-12 and 13. The controller 15 is configured so that either the signal from the water flow detection switch I2 or the signal from the pressure switch 13 is turned on (
When it is detected that the pressure in the supply pipe 8 has decreased or that water (hot water) is flowing in the supply pipe 8, the pressure pump 10 is turned on. It is intended to be controlled.

Further, 17 is a water supply pipe that penetrates the side of the vortex I4 water tank 1, and a ball tap 18 is provided at the tip of the water supply pipe so that water can be replenished according to the amount of water used. When replenishing the water supply, water is supplied to the vicinity of the bottom of the water heater water tank l via the vertical pipe 18 so that the hot water at the top and the makeup water do not intersect.

Note that as a water supply system, a solenoid valve may be provided in place of the ball 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 water tank 1.

According to the storage type water heater having the above configuration, the water heater water tank 1 has an air layer S at the upper part, and this air layer S is opened to the atmosphere. The water stored inside can be completely boiled, and hot water at a high temperature of around 100° C. can be supplied from the faucet 17.

Hot water is supplied by opening the faucet 17. At this time, as hot water is discharged from the faucet 17, the pressure in the supply pipe 8 decreases and the pressure switch 13 is turned on, and based on this, the pressure pump is turned on. 11 is in operation. Thereby, hot water supply from the faucet 17 is continued.

When the faucet 17 is turned off, the pressure inside the supply pipe 8 temporarily increases by 2 and the pressure switch 13 is turned off, but since the flow rate detection switch 12 remains on, the pressure pump 10 continues to operate. Therefore, stable hot water is supplied from the faucet 17. Note that when the flow rate detection switch 12 is not provided, the pressure inside the supply pipe 8 changes by adjusting the throttle of the water faucet 17, and the pressure switch 13 detects this and repeatedly turns the pressure pump on and off in a very short period of time. This causes a problem that the amount of water supplied from the faucet 17 is not stable, but this example does not have such a problem.

/JA Boiler When the temperature inside the water tank 1 rises, evaporation progresses inside and the generated steam is discharged to the outside via the open pipe 2 etc. At this time, a water cooling jacket 5 is provided around the outer periphery of the open pipe 2. Therefore, the steam in the open pipe 2 is cooled and condensed by the water-cooled basin 5, and the condensed water is quickly discharged from the drain pipe 3. In particular, in this embodiment, the open tube 2
A water cooling jacket 5 is provided at the downwardly bent bent portion 2a, and since steam tends to accumulate in the bent portion 2a due to its specific gravity, steam can be efficiently condensed.

Therefore, with this water heater, steam is not discharged to the outside and the surrounding area does not get damp.

Second Embodiment FIG. 2 shows a second embodiment of the present invention. This embodiment differs from the first embodiment described above in that in addition to the open pipe 2, an overflow pipe 20 is provided on the side of the water heater water tank 1. Then, the tip of the overflow pipe 20 is inserted into the tray part 4 of the drain pipe 3. Further, a partition plate 21 having a semicircular or U-shaped cross section is provided on the inner peripheral surface of the water heater water tank l so as to cover the proximal opening of the overflow pipe 20, and the lower end of the partition plate 12 is placed at a predetermined position below the water surface. It extends to the depth position.

In this example, due to the difference in evaporation area, the water heater body 1
The steam generated inside is mainly discharged to the outside through the open pipe 2.

Therefore, in order to prevent steam from being discharged to the outside, it is sufficient to provide a cooling means such as a water cooling jacket 5 only on the outer periphery of the open tube 2. In this embodiment, the same components as in the first embodiment are given the same reference numerals.

In each of the above embodiments, a water-cooled jacket 5 is used as a cooling means provided on the outer periphery of the open pipe 2, but the cooling means is not limited to the water-cooled jacket 5 in any way; It may be provided with fins or utilize the Peltier effect.

"Effects of the Invention" As explained above, according to the present invention, since the cooling means is provided on the outer periphery of the open tube, steam passing through the open tube can be cooled and condensed. Therefore, no steam is discharged from the open pipe, which prevents the surrounding area from becoming damp, and is also superior in terms of safety.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the schematic configuration of the first embodiment of the present invention, and FIG.
The figure shows a second embodiment of the invention. 1. Water heater water tank, 2. (Pressure) release pipe, 3. Drain pipe, 5. Water cooling/scalding throat (cooling means), S -. Air layer.

Claims (1)

[Claims] In a water heater in which 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 by a pressure release pipe and an overflow pipe, a cooling means is provided on the outer periphery of the pressure release pipe. A water heater characterized by: