JPH0211832B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a configuration that contributes to improving the hot water supply performance of hot water boilers used in water heaters and household heating equipment.

Conventional configuration and its problems Conventionally, this type of hot water boiler has been configured as shown in FIG. That is, a heat exchanger 24 in which an annularly formed upper header 21 and a lower header 22 are vertically connected by a plurality of vertical pipes 23, a water supply pipe 25 and a hot water supply pipe 26 attached to the upper part of the upper header 21, and a heat exchanger 24 attached and a temperature sensor 27.

When water enters the heat exchanger 24 from the water supply pipe 25 during combustion in the boiler, a portion of the water spreads into the upper header 21 as shown by arrow a.
Other water descends in the vertical pipe 23 near the water supply pipe, as shown by arrow b. For example, if the temperature sensor 27 is located in the lower header 22, the hot water supply pipe 2
Since the temperature of the lower header 22 is low, the temperature detector 27 always detects the temperature in the ON state even when a small flow of hot water is being discharged from the continuous hot water supply from the boiler. pipe 2
6. Boiling water comes out.

In this case, when the temperature setting of the temperature detection is lowered, the temperature detector 27 performs ON and OFF temperature detection, which causes the boiler to operate intermittently and prevents boiling water from coming out, but the water supply is stopped. When boiling water from water, there was a problem in that the temperature setting was low, so hot water could not be obtained.

Next, if the temperature sensor 27 is located in the vertical pipe 23,
Since the amount of water in the vertical pipe 23 is small and the vertical pipe 23 is a place where heat is exchanged, the temperature distribution within the pipe becomes uneven. Therefore, stable temperature detection cannot be performed.

Next, if the temperature sensor 27 is located on the upper header 21,
During continuous hot water dispensing, the supplied water and the hot water obtained by combustion slowly mix in the upper header 21, resulting in large fluctuations in the temperature of the hot water, making stable temperature detection impossible.

As mentioned above, there are problems with the hot water supply performance, and since the supplied water moves toward the lower header 22 in the vertical pipe 23 near the water supply pipe, the vertical pipe near the water supply pipe 25 is cooled.
There was a problem in which water condensed on the outer surface of the vertical pipe 23 during combustion, fell into the combustion chamber, and accumulated.

OBJECTS OF THE INVENTION The present invention eliminates these conventional problems, and eliminates problems in hot water supply performance by making it possible to perform appropriate temperature detection, and also prevents the generation of dew condensation.

Structure of the Invention In order to achieve this object, the hot water boiler of the present invention has an annularly formed upper header and a lower header connected vertically by a plurality of vertical pipes, and a feed water temperature sensor is equipped on the upper header, and A pipe is provided in the water supply pipe, the lower end of the pipe is closed off, and an opening for supplying water into the upper header is located in the center of the upper header and is provided in a circumferential direction.

With this configuration, water is supplied to the upper header while being rotated at a high speed. Therefore, the swirling force of the supplied water becomes large.

If the supplied water does not have swirling force, the hot water and water will mix very slowly and the water temperature will not be stable. However, if the supplied water has swirling force, the hot water and water will be instantaneously stirred and mixed. The temperature will become stable. Because of this, stable temperature detection can be performed in the upper header, so the hot water supply performance can be satisfied, and the water supplied in a swirling manner flows uniformly into each vertical pipe. The water is heated through natural convection with the hot water in the vertical pipes. For this reason, the water flowing toward the vertical pipes is not concentrated in one part, so only the vertical pipes near the water supply pipes are cooled and no condensation water is generated.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on FIGS. 1 and 2.

In the figure, 1 is a combustion chamber, 2 is an annular lower header surrounding the combustion chamber 1, and 3 is an annular upper header. The upper header 3 and the lower header 2 are vertically connected by a plurality of vertical pipes 4. A heat exchanger 5 is formed. 6,7
are a water supply pipe and a hot water supply pipe installed in the upper header 3 above the heat exchanger 5. Reference numeral 8 denotes a pipe provided within the water supply pipe 6. The lower end of the pipe 8 is closed, and an opening is provided at a position located in the center of the upper header 3 and in the circumferential direction. 9
is a temperature sensor attached to the upper header 3.

The operation will be explained below.

During combustion of the boiler, the water supplied from the water supply pipe 6 is supplied to the upper header 3 in a circumferential direction as shown by an arrow C through a pipe 8 provided within the water supply pipe 6. For this reason, water and hot water are instantaneously stirred and mixed in the upper header 3 by the swirling force of the supplied water. If there is no swirling force, the hot water and water will mix slowly, resulting in uneven temperature distribution within the upper header 3, making it impossible to perform good temperature detection. This eliminates the problem of creating a stable hot water temperature, allows stable temperature detection, and satisfies the hot water supply performance. Moreover, by rotating the water supply, the amount of water directed toward each vertical pipe 4 becomes uniform. If the water supply does not have a turning force, it will concentrate on the vertical pipe 4 near the water supply pipe 6, and the inertia of the water will cause the vertical pipe 4 to
Pass through to the lower header 2. For this reason, unlike other vertical pipes 4, the vertical pipe 4 near the water supply pipe 6 is cooled by water, which causes condensation water during combustion, which accumulates on the bottom of the combustion chamber 1, causing combustion. Although this had a negative effect on performance, the swirling water supply allows water to flow uniformly into each vertical pipe 4.
Since heating occurs while generating natural convection in each vertical pipe 4, there is no possibility of condensation water forming.

Effects of the Invention As described above, according to the present invention, water and hot water are instantaneously stirred and mixed in the upper header, producing a stable temperature of the hot water, making it possible to perform stable temperature detection. This makes it possible to satisfy the hot water supply performance. Furthermore, the water supply flows uniformly into each vertical pipe due to the swirling water supply system, and is heated while causing natural convection. Therefore, it is possible to prevent the formation of dew water on the surface of the vertical pipe during combustion, and the combustion performance can be satisfied.

[Brief explanation of drawings]

Fig. 1 is a plan view of a hot water boiler showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the same boiler, and Fig.
The figure is a longitudinal sectional view of a conventional hot water boiler. 2...Lower header, 3...Upper header, 4...Vertical pipe, 6...Water supply pipe, 8...Pipe, 9...
Temperature detector.

Claims (1)

[Claims] 1 An upper header and a lower header formed in an annular shape are vertically connected by a plurality of vertical pipes, the upper header is equipped with a water supply pipe, a hot water supply pipe, and a temperature sensor, and a pipe is provided within the water supply pipe, and the pipe A hot water boiler characterized in that an opening for closing off the lower end and supplying water into the upper header is located in the center of the header and in a circumferential direction.