JPS6337599Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a residual water discharge device used to prevent freezing of water heaters.

(Prior Art) Conventionally, when a water heater is not in use during the winter, a drain plug is generally provided below the waterway to prevent water from freezing inside the waterway.

However, a small amount of water remaining inside a heat exchanger such as a water heater immediately after draining water becomes water droplets that travel down the pipe wall of the waterway and drip downward, collecting in the horizontal waterway and becoming residual water as the outside temperature drops. There is a disadvantage that the residual water freezes and blocks the waterway, and when it is reused, the frozen water does not thaw quickly and it takes a long time for the water to flow, so it is desired to be able to quickly drain the residual water.

(Problems to be Solved by the Invention) An object of the present invention is to provide a residual water discharge device that meets such demands.

(Means for solving the problem) The present invention provides a part of the water supply pipe with a pool of water that drips down the pipe wall, and a siphon pipe that drains the collected water from the pool. It consists of

(Example) The present invention will be explained below with reference to the drawings.

FIG. 1 shows an example of implementing the present invention.
The illustrated residual water discharge device connects the water supply pipe 1 to the upper pipe 1.
a and a lower tube 1b, inflate the end of the upper tube 1a, insert the lower tube 1b into this bulge 4, and provide a communication port 5 between the upper end of the upper tube 1a and the lower tube 1b. At the same time, a water pool 2 is formed between the bulge 4 and the lower pipe 1b, one side 3a of the siphon pipe 3 is exposed near the bottom of the water pool 2, and the other side 3b penetrates the wall of the lower pipe 1b. The water droplet W passes through the communication port 5 and collects in the water pool part 2, and the collected water passes through the siphon pipe 3 and passes through the lower pipe 1b to the outside. I made it eject. FIG. 2 is an explanatory diagram of the configuration of an example of a water heater using the residual water discharge device of the present invention.
Water control with internal diaphragm 9 etc., 1
0 is a water connection port that supplies water to the water control 6;
Reference numeral 11 denotes a water drainage pipe with a stopper 12 that can be opened and closed at the end, 13 a heat exchanger, 14 an outlet for hot water heated through the heat exchanger 13, and 15 a water outlet for heating the heat exchanger 13. A burner 16 indicates a fuel passage for supplying fuel to the burner 15 and the pilot burner 15a, and a gas control 17 for controlling the supply of fuel is interposed in the fuel passage 16.
18 is the water control 6, the heat exchanger 13,
A water heater frame 19 surrounding the burner 15, gas control 17, etc. is a water bypass path connected to the outlet path 14.

Such a water heater is not particularly different from conventionally known water heaters.

The device of the present invention has a water control unit 6 that controls water droplets W that are most likely to be collected in such water heaters.
The heat exchanger 13 is disposed in a vertical portion of the water supply pipe 1 that connects the water pipe 1 with the heat exchanger 13.

Next, to explain its operation, consider the case where the tap 12 of the drain pipe 11 is opened to drain the water inside when it is not in use during the winter. The small amount of water remaining in the exchanger 13 becomes water droplets and drips down the tube wall, and the thin tubes are formed by the action of the surface tension of the residual water that collects in the horizontal part of the waterway (for example, the ventilate 7 part in the second diagram). However, according to the present invention, this residual water is collected in the water reservoir part 2 and the siphon pipe 3 is operated to discharge the residual water. That is, the water remaining in the water pool 2 immediately after draining is drained from the siphon pipe 3 by the siphon action, and the water remains in the water pool 2 immediately after the water is drained.
becomes empty, and then the small amount of water remaining in the heat exchanger 13 becomes water droplets W that travel along the pipe wall of the water supply pipe 1 and drip downward, passing through the communication port 5 and forming the water pool 2.
However, when the water level rises and reaches the upper part 3c of the siphon pipe 3, the siphon pipe 3 causes a siphon action, and the remaining water is sent through the lower pipe 1b to water. It can be discharged to the outside from the drain pipe 11, and at this time, when the residual water passes through the drain pipe 11, air is sucked in from the outlet, and this air causes water to remain in the thin tubes of, for example, the ventilator 7. There's nothing to do. Although air is introduced into the siphon tube 3 upon completion of the discharge, this air is pushed away by the water flow guided to the upper tube 1a via the lower tube 1b and is removed without causing any inconvenience when it is reused.

The one shown in Figure 3 has a plug 22 at the end that can be opened and closed.
The water draining device 21 consists of a main pipe 23 and a branch pipe 24, which are connected to the lower parts of a high pressure water chamber 25 and a low pressure water chamber 26 of a water governor 8, which are divided into two by a diaphragm 9, as shown in the figure. When the stopper 22 is opened, not only the water in the high-pressure water chamber 25 but also the water in the low-pressure water chamber 26 can be discharged at the same time. Even in this case, no residual water is generated in the low-pressure water chamber 26, so water will not freeze in the low-pressure water chamber 26 due to non-use during the winter, and this will help prevent damage to the diaphragm 9. When used in conjunction with a standing water discharge device, the effectiveness of preventing water heaters from freezing will be further enhanced.

(Effect of the invention) As described above, according to the invention, a part of the water supply pipe is provided with a water pool for water droplets that drip down the pipe wall, and a siphon pipe is provided in the water pool to discharge the water that has collected there. Therefore, during normal water draining work, the water droplets that remain inside are collected and discharged to the outside all at once, and since no water remains inside, freezing can be prevented and water can be recirculated without any problems. It has the advantage of being simple in structure and easy to manufacture.

[Brief explanation of the drawing]

Figure 1 is an enlarged cross-sectional side view of one example of implementing the present invention;
FIG. 2 is an explanatory diagram of the configuration of a water heater using the residual water draining device of the present invention, and FIG. 3 is a cutaway side view of one example of the water draining device. 1...Water supply pipe, 2...Water pool, 3...Siphon pipe, W...Water drop.

Claims (1)

[Scope of utility model registration request] This residual water discharge device comprises a part of a water supply pipe provided with a water reservoir for water droplets that drip down the pipe wall, and a siphon pipe for discharging the water collected in the water reservoir.