JPS5822837A - Heat exchanger of hot water boiler - Google Patents

Abstract

PURPOSE:To improve the re-using performance of the titled heat exchanger in cold weather by a method wherein the ends of adjoining fin pipes are connected together by joints each having an inner diameter larger than that of each of the fin pipes so that even when water remaining in the joints freezes, a space allowing the water to pass therethrough is formed in each of the joints. CONSTITUTION:The heat exchanger 12 provided above burner 11 in the hot water boiler is of such structure that a drum pipe 14 for supplying water to the heat exchanger 12 is fixed aslant to the outer circumference of a drum 13, while fins 15 for collecting the combustion heat from the burner 11 are arranged at the upper part of the drum 13 and a plurality of hollow fin pipes 16 are fixed to the fins 15. With the above structure, one end of the outermost fin pipe 16 communicates with the upper end of the drum pipe 14 and the ends of the adjoining fin pipes are connected together by means of the joints 17, each of which is formed in the shape of letter U and whose inner diameter is about 1.2 times that of each of the fin pipes 16. As a consequence, the joints 17 are prevented from being blocked due to the freezing of water remaining therein.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat exchanger for a water heater.The present invention relates to a heat exchanger for a water heater. The purpose is to be able to measure the improvement of usage performance.

In general, water heaters have the problem that when the winter temperature drops below 0°C, the water inside the water heater freezes and becomes red when reused.

Conventionally, freezing was prevented by methods such as keeping warm with anti-freeze heaters or draining water, but this poses major problems when considering power outages, water outages, energy conservation, and resource conservation, so it is common practice to drain water from water heaters. It was being done. However, in conventional heat exchangers for water heaters, the inner diameter of the fin pipe (1) and the inner diameter of the joint (as shown in Figure 1) are almost the same, so if the water heater is tilted, the Even if the water inside the heat exchanger is drained, the joint at the end of the heat exchanger's fin pipe (1)
If water remains and the inner diameter is small, if the liquid level is at about 60% or more of the inner diameter, the interior of the joint mortar will be blocked due to surface tension and volumetric expansion of water due to freezing. For this reason, there was a major problem in that water could not be passed during reuse, and the joint could not be used until the ice in the joint had melted. Therefore, if the diameter of the fin pipe is IOW, it is necessary to install the water heater at an inclination of about 6 cm or less. However, in actual construction, it is necessary to perform foundation work, water supply work, hot water supply work, and gas piping work, and at the end, use a leveling level to measure the height to 1IljI just like with precision equipment. Considering the above, it was a very difficult problem.

The present invention eliminates the drawbacks of the conventional technology, and the following is a drawing showing an example of the implementation of the present invention.
In Figure 0, which will be explained based on , the mouse is a burner in a water heater (not shown), and (2) is a heat exchanger provided above the burner (C). os is a drum that collects the combustion heat of the burner (2) and guides it upward.

(B) is a drum pipe that supplies water to the heat exchanger (2), and is fixed to the outer periphery of the drum (2) with an inclination. ＠ is a fin to collect the combustion heat of the burner seaweed, and the drum (2
) are provided in large numbers at regular intervals. o4・-・
is a plurality of hollow fin pipes that penetrate through holes in the fin (2) and are fixed to the fin (2), and one end of the fin vibe tube located at one end is communicated with the upper end of the drum vibe Sakaki, Also, the mutually adjacent ends of the fin pipe (to) are connected with a joint (b), so that the fin pipe m
- is like a single wooden pipe bent into a meandering shape to allow water to flow through it. The n-type joint 4 is formed into a U-shape, and its inner diameter is approximately L2 times larger than the inner diameter of the fin pipe (2).

(to) is the outlet of the fin pipe (to) located at the other end, and is connected to the hot water supply outlet of the water heater.

In the above configuration, when water is drained in cold weather, the water in the heat exchanger (b) is drained out of the water heater through the drum pipe. At this time, the drum pipe (b) is sloped along its entire length, so it takes a long time.

If the water heater is installed horizontally, the inside of the fin pipe (2) and fitting (b) will not be blocked by residual water, but if it is installed at an angle, water will remain inside the fitting (b). do. However, since the joint (B) is U-shaped and has an inner diameter larger than the inner diameter of the fin vibe, the allowable tilt angle of the heat exchanger (B) before the inside of the joint (B) is clogged with residual water is wide. growing. Since the inside of the joint (2) of heat exchanger 0 is not blocked by residual water, even if the outside temperature drops below 0℃ and the residual water freezes after draining, water can be passed through and it can be reused immediately. can.

The heat exchanger for a water heater of the present invention as described above is characterized in that the ends of adjacent fin pipes are connected by a joint having an inner diameter larger than the inner diameter of the fin pipes, and as follows: The effects described above can be obtained.

■ Since the permissible installation angle for water heaters for draining and reuse is greatly increased, restrictions on installation work such as foundation work, water supply work, hot water supply work, gas piping work, etc. are greatly reduced.

■ There is more leeway than ever before against frost heave effects and secular changes in cold regions.

■ Since the structure is simple, water heaters for freezing prevention can be supplied to the market at extremely low cost.

[Brief explanation of the drawing]

Fig. fi1 is a sectional view of a main part of the conventional example, Figs. 1 and 2 are a plan view showing an example of the implementation of the present invention, Fig. Kametomi is a partially cutaway side view of the same, and Fig. 14 is a sectional view of the same part. (B) - Burner, (2) - Heat exchanger, (2) - Drum, (B) - Drum pipe, @4^ fin, (C) - Fin pipe, (2) - Fitting agent Harumoto Yoshihiro

Claims (1)

[Claims] A heat exchanger for a water heater, characterized in that the ends of adjacent fin pipes are connected by a joint having an inner diameter larger than the inner diameter of the fin pipes. ! L m Hand diameter is approximately 14@ than the inner diameter of the fin pipe.
The patent claim characterized by the above-mentioned large red pit
tli1 item heat exchanger for water heater.