JPS6146845A - hot water boiler - Google Patents

Abstract

PURPOSE:To make an instantaneous agitating and mixing of water and hot water, promote a stable temperature sensing and at the same time a generation of dew water is prevented by a method wherein when water is fed to an upper water collection header, the fed water is circulated in the header and a hot water temperature sensor is arranged at a side opposite to the circulating direction of water. CONSTITUTION:A water feeding pipe 6 is arranged at an upper header 3 having a relative low temperature at a burner fixing part. Water feeding from the water feeding pipe 6 is circulated and fed as indicated by an arrow C by a circulation pipe 9 in respect to the circumferential direction of the upper header 3. The fed water is mixed with hot water instantaneously and then a stable hot water temperature can be detected by a temperature sensor 10 arranged at the opposite side of the opening of the circulation pipe 9. Amount of the water direction toward each of the vertical pipes 4 become uniform, so that a natural convection flow is generated in the vertical pipe 4 and thus no dew water is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Application Field 8A 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 Structure and Problems Conventionally, this type of hot water boiler has a structure 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, and a water supply pipe 26 attached to the upper part of the upper header 21.
and a temperature sensor 27 attached to a hot water supply pipe 26 and a heat exchanger 24.

Here, 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.

The other water descends in the vertical pipe 23 near the water supply pipe 25, as indicated by the arrow. Therefore, for example, the temperature sensor 27
If it is attached to the lower header 22, the temperature detector 27 will always turn ON to detect the temperature even if the hot water is continuously discharged from the hot water pipe 26 and a small amount of hot water is discharged because the temperature of the lower header 22 is low. Therefore, the boiler operates continuously, and therefore, boiling water comes out from the hot water supply pipe 26. In this case, if you lower the temperature setting of the temperature detector 27 to prevent boiling, the temperature detector 27 will detect the temperature frequently by turning ON and OFF, which will cause the boiler to operate intermittently and prevent boiling water from coming out. There was a dispute that if you boil water from water with the water supply turned off, you won't get hot water because the temperature setting is low. Next, if the temperature sensor 27 is attached to the vertical pipe 23, the amount of canned water in the vertical pipe 23 is small, and the vertical pipe 23 is where heat is exchanged by the burner, so the temperature distribution inside the pipe is uneven. becomes. Therefore, stable temperature detection cannot be performed. Furthermore, if the temperature sensor 27 is placed in 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.
The water temperature fluctuates so much that stable temperature detection becomes impossible. Furthermore, since the flame formed by the burner section 28 hits the lower header 22 in front of the burner section 28, the flame formed by the burner section 28 hits the lower header 22.
Even in 2, the temperature distribution is uneven on the front, back, left and right sides of the flame.
Therefore, the vertical pipe 23 and the upper header 21 are also affected by the uneven temperature of the lower header 22, making temperature detection even more difficult. Furthermore, the supplied water advances toward the lower header 22 in the vertical pipe 23 near the water supply pipe 25, and the vertical pipe 23 near the water supply pipe 25 is cooled.
There was a problem in that during combustion, water condensed on the outer surface of the vertical pipe 23 and fell into the combustion chamber, causing water to accumulate.

Purpose of the Invention In view of these conventional problems, it is an object of the present invention to eliminate defects in hot water supply performance by making it possible to perform appropriate temperature detection, and to also prevent the generation of condensed water. be.

Structure of the Invention In order to achieve the above object, the hot water boiler of the present invention connects an annularly formed upper ladder 21 and a lower header 22 vertically through a plurality of vertical pipes 23, and connects a water supply pipe 25 and a hot water supply pipe to the upper header 21. Equipped with a pipe 26 and a temperature sensor 27, the water supplied from the water supply pipe 25 is supplied to the upper rudder 21.
It is equipped with means for turning inside.

The present invention has the above configuration, so that if the supplied water has no swirling force, the mixing of hot water and water will be very slow and the temperature will not be stable, but if the supplied water has a high velocity swirling force, Hot water and water are instantly stirred and mixed, but the temperature sensor 27
If it is located in front of the opening of the revolving pipe, it will not be cooled by the supplied water and the set temperature of the temperature detector 27 will have to be lowered as described in the conventional example, resulting in a problem. Therefore, the temperature detector 27 is provided on the opposite side of the opening of the swirl pipe, and the water supply pipe 25 provided with the swirl pipe is located near the burner attachment portion 28 because the flame formed by the burner is It hits the front of the burner of the lower header 22, and the temperature rise in that part is higher than other parts.
In the vertical pipe 23 and the upper header 21, the temperature is higher in those parts, so by circulating the water supply from the lower temperature part near the burner mounting part 28, it is more effective. By promoting the mixing of water and thirst, the temperature of the hot water in the upper header 21 is stabilized as described above. Therefore, the hot water supply performance can be improved by stably detecting the temperature in the upper header 21, and the water supplied in a swirling manner flows uniformly into each vertical pipe 23. It is heated while causing natural convection with the hot water in the vertical pipe 23. For this reason, the water flowing toward the vertical pipe 23 is not concentrated in one part, so that only the vertical pipe 23 near the water supply pipe 25 is cooled, and no condensation water is generated.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on FIG. 1.2.

In the figure, 1 is a combustion chamber, 2//''i is an annular lower header surrounding the combustion chamber 1, 3 is an annular upper header, and the upper header 3 and lower header 2 are connected vertically by multiple vertical pipes 4. 6.7 is a water supply pipe and a hot water supply pipe installed in the upper header 3 at the top of the heat exchanger 5. 8 is a water supply pipe and a hot water supply pipe installed in the lower header 2 at the bottom of the heat exchanger 5. The water supply vibro is located to the left of the burner 8 mounting part. 9 is a rotating pipe installed inside the water supply vibro. The lower end of this swirl pipe 9 is closed, and the opening is closed. It is provided at the center of the upper header 3 and at a location located in the circumferential direction. 10 is a temperature sensor located on the opposite side of the opening of the swirl pipe 9 and housed in the upper header 3.

The operation in the above configuration will be explained.

During combustion in the hot water boiler, burner 8 is exposed to flame.
The temperature of the front heat exchanger section 5 becomes higher than the other sections. On the other hand, the water supplied from the water supply pizoro is transferred in the circumferential direction of the upper header 3 as shown by the arrow C through the revolving pipe 9 installed in the water supply vibro installed in the upper header 3 where the temperature is relatively low where the burner 8 is attached. Swirling water supply is performed for. For this reason, the supplied water and hot water are instantaneously and effectively stirred and mixed within the upper header 3, depending on the swirling force and position of the supplied water. Therefore, the temperature sensor 10 provided on the opposite side of the opening of the swirl pipe 9 can obtain a stable temperature of a mixture of water and hot water, and can perform stable temperature detection.
The hot water supply performance can be fully satisfied. Moreover, by supplying water in a rotating manner, 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 vibro, and will flow through the vertical pipe 4 toward the lower header 2 due to the inertial force of the water supply pressure. Therefore, unlike other vertical pipes 4, the vertical pipe 4 near the water supply vibro generates dew water during combustion because it is cooled by water, and the condensed water accumulates on the bottom of the combustion chamber 1, resulting in poor combustion performance. However, with the swirling water supply, the water flows uniformly into each vertical pipe 4 and is heated while causing natural convection within each vertical pipe 4, so there is no possibility of condensation.

Effects of the Invention As described above, according to the present invention, the water is supplied from the swirling pipe provided in the water supply pipe located in the lower water temperature area of the upper header, and the temperature is detected at a location opposite to the swirling direction. By installing a container, the water and hot water are instantly and effectively stirred and mixed to produce a stable water temperature, making it possible to perform stable temperature detection and satisfy the hot water supply performance. , the water supply flows uniformly to each vertical pipe through the swirling water supply.The water supply flows into each vertical pipe and is heated while causing natural convection, which prevents condensation water from forming on the surface of the vertical pipes during combustion.
Satisfies combustion performance.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a hot water boiler showing one embodiment of the misfire J, FIG. 2 is a cross-sectional view of the same boiler, and FIG. 3 is a vertical cross-sectional view of a conventional hot water boiler. 2 Lower header, 3... Upper header, 4-... Vertical pipe, 6- Water supply pipe, 7 Hot water supply pipe, 10 Temperature detector, Name of agent: Patent attorney Toshio Nakao and 1 other person Figure 1 and Figure 2 Figure 3

Claims (2)

[Claims] (1) An upper header and a lower header formed in an annular shape are vertically connected by a plurality of vertical pipes, and the upper header is equipped with a water supply pipe, a hot water supply pipe, and a temperature sensor, and the water supplied from the water supply pipe is transferred to the A hot water boiler having means for pivoting within the upper header. (2) The water supply pipe is located to the left or right of the burner attachment part of the upper header, and a turning pipe as a turning means is provided in the water supply pipe, the lower end of the turning pipe is closed, and the opening is in the upper header. 2. The hot water boiler according to claim 1, further comprising a temperature sensor provided at a central portion located in the circumferential direction and on the opposite side of the swirl pipe opening.