JPH0328669B2 - - 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 within the vertical pipe 23 near the water supply pipe 25, as shown by arrow b. For example, if the temperature sensor 27 is attached to the lower header 22,
Even in the case of a small flow of hot water from the hot water supply pipe 26, the temperature of the lower header 22 is low, so the temperature detector 27 always turns ON to detect the temperature, so the boiler operates continuously. Then, boiling water comes out from the hot water supply pipe 26. In this case, if you lower the temperature setting of the temperature sensor 27 to prevent boiling, the temperature sensor 27 will frequently turn ON and OFF to detect the temperature, which will cause the boiler to operate intermittently and prevent boiling water from coming out, but the water supply will When boiling water with the water turned off, there was a problem in that the temperature setting was too low to get hot water. Next, the temperature sensor 27 is connected to the vertical pipe 23.
If it is installed in the pipe, the amount of canned water in the vertical pipe 23 is small, and since the vertical pipe 23 is a place where heat is exchanged by the burner, the temperature distribution inside the pipe becomes uneven. Therefore, stable temperature detection cannot be performed. Furthermore, if a temperature sensor 27 is attached to the upper header 21, during continuous hot water dispensing, the water supplied and the hot water obtained by combustion mix slowly in the upper header 21, so that the temperature of the hot water can be increased. The fluctuation in temperature is large, making stable temperature detection impossible. or,
Since the flame formed by the burner section 28 hits the lower header 22 section in front of the burner section 28, the temperature distribution becomes uneven in the lower header 22 as well in the front, back, right and left directions of the flame. Header 2
1 is also affected by the uneven temperature of the lower header 22, making temperature detection even more difficult. Furthermore,
The supplied water flows through the vertical pipe 2 near the water supply pipe 25.
3 toward the lower header 22, and the water supply pipe 2
The vertical pipe 23 near No. 5 was cooled, and 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 water.

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 has an annularly formed upper header 3 and a lower header 2 connected vertically by a plurality of vertical pipes 4, and a water supply pipe 6 and a hot water supply pipe 7 connected to the upper header 3. and a temperature sensor 10, the water supply pipe 6 is located near the burner attachment part 8, and has a swing pipe 9 in the water supply pipe 6 whose lower end is closed and has an opening on the side. is the center of the upper header 3,
The temperature sensor 10 is oriented in the circumferential direction of the upper header 3, and the temperature sensor 10 is provided on the opposite side of the opening of the swirl pipe 9.

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 water temperature will not be stable, but the supplied water has a high velocity swirling force. Then, hot water and water are stirred and mixed instantly, but if the temperature sensor 27 is located in front of the opening of the swirl pipe, it is cooled by the supplied water, so the set temperature of the temperature sensor 27 is set as described in the conventional example. This causes problems because it has to be lowered to a certain level. Therefore, the temperature sensor 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 to avoid the flame formed by the burner. hits the front of the burner of the lower header 22, and the temperature rise in that part is higher than in other parts, so the vertical pipe 23,
In the upper header 21, the temperature is higher in that part, so by circulating the water from the lower temperature part near the burner attachment part 28, water and hot water can be more effectively distributed. As mentioned above, the temperature of the hot water in the upper header 21 is stabilized. Therefore, the hot water supply performance can be improved by making stable temperature detection possible 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 FIGS. 1 and 2.

In the figure, 1 is a combustion chamber, 2 is an annular lower header that surrounds the combustion chamber 1, and 3 is an annular upper header. It forms an exchanger 5. 6 and 7 are water supply pipes and hot water supply pipes installed in the upper header 3 above the heat exchanger 5. 8 is a burner attached to the lower header 2 at the bottom of the heat exchanger 5. The water supply pipe 6 is located to the left of the burner 8 mounting portion. Reference numeral 9 denotes a turning pipe installed inside the water supply pipe 6, and the lower end of this turning pipe 9 is closed.
The openings are provided at the center of the upper header 3 and at locations located in the circumferential direction. 10 is a temperature sensor located on the opposite side of the opening of the swirl pipe 9 and attached to the upper header 3.

The operation in the above configuration will be explained.

During combustion in the hot water boiler, the temperature of the portion of the heat exchanger 5 in front of the burner 8, which is exposed to the flame of the burner 8, becomes higher than other portions. On the other hand, the water supplied from the water supply pipe 6 is passed through the circle of the upper header 3 as shown by the arrow c through the turning pipe 9 provided in the water supply pipe 6 installed in the upper header 3 where the temperature is relatively low where the burner 8 is attached. Water supply is performed in a circular manner in the circumferential direction. For this purpose, depending on the turning force and the turning position of the water supply, the upper header 3
Inside, the supplied water and hot water are instantaneously and effectively stirred and mixed. Therefore, the temperature sensor 10 installed on the opposite side of the opening of the swing pipe 9 can obtain a stable temperature of the mixed water and hot water, and can perform stable temperature detection to ensure sufficient hot water supply performance. I can be satisfied. 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 be concentrated in the vertical pipe 4 near the water supply pipe 6 and will flow toward the lower header 2 through the vertical pipe 4 due to the inertial force of the water supply pressure. 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. This had a negative effect on performance, but with the swirling water supply, water flows uniformly into each vertical pipe 4 and is heated while causing natural convection within each vertical pipe 4, eliminating the possibility of condensation. .

Effects of the Invention As described above, according to the present invention, water is supplied in a rotating manner from a rotating pipe provided in a water supply pipe located in a place where the water temperature is low in the upper header, and temperature is detected in a place located on the opposite side of the rotating direction. By providing a container, water and hot water are instantaneously and effectively stirred and mixed to produce a stable water temperature, which allows stable temperature detection and satisfies hot water supply performance. Furthermore, the swirling water supply allows the water to flow uniformly into each vertical pipe and is heated while causing natural convection, preventing the formation of condensed water on the surface of the vertical pipes during combustion, and achieving satisfactory combustion performance.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional 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. 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, 1
0...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, and the upper header is equipped with a water supply pipe, a hot water supply pipe, and a temperature sensor, and the water supply pipe is located near the burner attachment part and , a swing pipe having a closed lower end and an opening on the side is provided in the water supply pipe; A hot water boiler with a temperature detector installed on the opposite side of the swirl pipe opening.