JPS6219893Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a heat exchanger for a water heater.

BACKGROUND TECHNOLOGY If the water in a water heater is left without being drained when the temperature is below freezing in cold weather, the water may freeze and destroy the heat exchanger body. Therefore, when the heat exchanger is not used for a long time in freezing temperatures or at night, the water in the water heater is drained to prevent the heat exchanger from freezing and breaking. A conventional heat exchanger is shown in FIGS. 1 and 2. That is, a first pipe 2 for water circulation is wound around the outer peripheral surface of the heat exchanger main body 1 in a coil shape, and the upper end of the heat exchanger main body 1 is connected to the first pipe 2 and has a meandering shape. A second pipe 3 is provided, and the water is configured to be warmed by the heat exchanger body 1 while passing through the series passage of the first pipe 2 and the second pipe 3.

Problems to be solved by the invention When draining water from the first and second pipes 2 and 3 attached to the heat exchanger body 1, if the water heater is tilted, Even if this is done, water 4 remains inside the second pipe 3 located at the upper part of the heat exchanger main body 1, as shown in FIG. this water 4
Although the heat exchanger main body 1 is unlikely to be destroyed even if it freezes, it completely blocks the water passage. Therefore, when reusing the water, the water passage is blocked, so even if water is passed through the water heater, the water does not flow, and eventually the water inside the second pipe 3 located at the top of the heat exchanger body 1 is The drawback is that the water heater cannot be used until the frozen area thaws.

An object of the present invention is to provide a heat exchanger that can completely drain water even when the water heater is installed at an angle.

Means for Solving the Problems In the heat exchanger of the present invention, a first pipe for water circulation is wound around the outer peripheral surface of the heat exchanger body in a coil shape, and the upper end of the heat exchanger body is provided with the first pipe for water circulation. A second pipe connected to the first pipe and arranged in a meandering manner is provided, and the water is configured to be warmed by the heat exchanger body while passing through the series passage of the first pipe and the second pipe. The right and left bent portions of the second pipe arranged in a meandering manner are connected to one end of a common drain pipe through a branch portion, and a drain plug is provided at the other end of each drain pipe. It is characterized in that it is connected to a drain part having a water drain part.

Effect According to this configuration, one water drain pipe having a water drain part is connected to each of the left and right bent parts of the second pipe through a branch part, so that water can be drained from any part of the second pipe. Even water can be collected and drained into the drainage pipe on the right or left side.

EXAMPLE Below, Figures 3 and 4 show an example of implementing the present invention.
This will be explained based on the diagram. In the figure, 11 is a heat exchanger main body of a water heater, and this heat exchanger main body 1
A first pipe 12a for water circulation is wound around the outer circumference of the pipe 1 in a coil shape. Heat exchanger body 1
The second pipe 12b located at the upper end of the heat exchanger body 11 is arranged in a meandering manner, and its bent portions 12c protrude outward from both ends of the heat exchanger body 11. The above configuration is the same as the conventional one shown in FIGS. 1 and 2. In such a heat exchanger, the present invention connects the bent portions 12c with one drain pipe 14 via the branch portions 13, and connects the bent portions 12c with one water draining pipe 14 at the tip of the pipe 14 than the second pipe 12b. A drain part 15 is provided on the lower side, and a drain plug 1 is provided in the drain part 15.
6 is provided.

Therefore, as shown in FIG.
1 is tilted lower to the right side, open the drain plugs 16, 16 of the left and right drain sections 15, 15, and the upper drain section 15 will function as an air purge. and lower water drain part 1
The water 17 in the second pipe 12b can be completely drained from the second pipe 12b. Note that the water in the first pipe 12a flows down the first pipe 12a and is completely drained out because the first pipe 12a is wound in a coil shape.

If you want to reuse the water heater after draining the water, tighten the drain plugs 16, 16 at both ends and let the water flow into the first and second pipes 12a, 12b.The water will flow immediately and it will be ready for use. becomes.

Effects of the Invention As described above, the present invention connects the right and left bent portions of the second pipe arranged in a meandering manner to one end of a common water draining pipe through a branch portion. Since a drain portion having a drain plug is connected to the other end of the drain pipe, the following effects can be obtained.

1 Even if water is drained with the water heater tilted, the water in the first and second pipes can be completely drained, and especially the water in the second pipe located at the upper end of the heat exchanger body can be drained completely. Even in sub-zero temperatures, the water heater can be reused immediately as long as the water is drained without leaving any residue.

2. Since the water drain part is provided in the second pipe located at the upper end of the heat exchanger body, the water in the second pipe can be completely drained regardless of whether the heat exchanger body is tilted to the left or right.

3 The bent part of the second pipe is connected to the water draining part via the branching part, so water can be drained from any part of the bending part, and the branching part is connected to the water draining part. Since it is connected to the water draining part through the pipe, water can be drained without opening many water drain valves, and the processing work is easy.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional example, FIG. 2 is a partially cutaway front view of the same, FIG. 3 is a perspective view showing an example of the implementation of the present invention, and FIG. 4 is a partially cutaway front view of the same. DESCRIPTION OF SYMBOLS 11...Heat exchanger main body, 12a...1st pipe, 12b...2nd pipe, 12c...bending part, 14...water draining pipe, 15...water draining part, 16...water Stopper, 17...Water.

Claims (1)

[Claims for Utility Model Registration] 1. A first pipe for water circulation is wound around the outer peripheral surface of the heat exchanger body in a coil shape, and the upper end of the heat exchanger body is connected to the first pipe, and a second pipe arranged in a meandering manner, the water is heated in the heat exchanger body while passing through the series passage of the first pipe and the second pipe, and the water is arranged in a meandering manner. Each of the right and left bends of the second pipe is connected to one end of a common drain pipe through a branch part, and the other end of each drain pipe is provided with a drain part having a drain plug. Heat exchanger for connected water heater. 2 Claim No. 1 for Utility Model Registration characterized in that a water drain part is provided below the second pipe
A heat exchanger for a water heating device as described in Section 1.