JPS6238191Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a hot water boiler used for hot water supply, space heating, etc. More specifically, the invention relates to a hot water boiler used for hot water supply, space heating, etc. A water tank is formed between the outer cylinder and a combustion chamber at the inner lower part of the inner cylinder, and a baffle body is provided above the combustion chamber to promote heat transfer through contact between the high temperature combustion gas and the inner cylinder. Regarding a hot water boiler that heats and generates hot water in a water tank through an inner cylinder, its purpose is to have a large combustion chamber in proportion to the heat output of the burner, so that a good and stable combustion state can be obtained, and also to The purpose is to make it possible to reduce noise.

Conventionally, in this type of hot water boiler, for example, ASHRAE GUIDE AND DATA BOOK,
As stated in the right column of page 328 of CHAPTER 26, 1969 edition of the EQUIPMENT edition, and as shown in Figure 5, a plurality of buttfuls of the buttful body d are attached to the inner cylinder a of the housing c consisting of an inner cylinder a and an outer cylinder b. The plates e... are formed in a spiral shape, and the buff-full body d is connected to the inner cylinder a.
It is shown that it was inserted into the
-93656 publication, as shown in Figure 6, the inner cylinder a
A housing c consisting of an outer cylinder b and a full plate g
A plurality of ...... are shown arranged in a stair-like manner.

However, in these conventional hot water boilers, the combustion chamber is narrowed by the space occupied by the buttful body inserted into the inner cylinder. Unable to increase volume, resulting in poor combustion,
This caused problems such as noise generation.

In other words, if the combustion chamber is small in relation to the heat output of the burner, not only will there be insufficient contact between the unburned components and the air, resulting in poor combustion, but also the pressure in the combustion chamber will become unreasonably high due to the combustion gases. As a result, the static pressure of the air supply fan increases, which increases fan noise and contributes to burner noise.

The purpose of this invention is to provide a hot water boiler that can have a large combustion chamber volume without increasing the size of the casing, can burn the burner in a good and stable state, can reduce noise, and has good thermal efficiency. It is in.

The structure of the present invention is to form a housing consisting of an inner cylinder and an outer cylinder, and a water tank is provided between the inner cylinder and the outer cylinder of the housing, and a combustion chamber is provided at the bottom of the inner cylinder. Attaching to the upper part of the chamber is a buttful body consisting of a cylinder with a lid that has an open bottom and an outer diameter slightly smaller than the inner diameter of the inner cylinder, and provides a plurality of ventilation holes in the body of the buttful body, A cylindrical sound-absorbing cylinder is provided above the buff-full body and continuous with the buff-full body, and first and second annular passages for combustion gas are formed between the buff-full body, the sound-absorbing cylinder, and the inner cylinder. It is.

Therefore, the space occupied by the buff-full body in the inner cylinder can be effectively used as a part of the combustion chamber.
Not only can combustion be stabilized, but combustion noise can be reduced. Furthermore, since the sound-absorbing tube is provided continuously above the buff-full body, not only can combustion noise be further muffled by the sound-absorbing tube, but also the sound-absorbing tube can further reduce combustion noise. The combustion gas blown into the first annular passage between the inner cylinder and the inner cylinder is directly raised along the inner cylinder in the second annular passage, and as a result, the heat transfer area of the inner cylinder is utilized more effectively. It can be done.

Hereinafter, embodiments of the present invention will be described based on the drawings.

A is the hot water boiler case, B is the casing, C
is the top of the exhaust stack. The housing A has a double cylinder structure consisting of an inner cylinder 1 and an outer cylinder 2, and has an inner cylinder 1 and an outer cylinder 2.
A water tank 3 is formed between the two. 4 is aquarium 3
5 shows the water supply pipe connection port for the hot water, and 5 shows the hot water outlet pipe. Reference numeral 6 denotes a fire port provided on the lower side surface of the housing A, and a burner 7 using oil or the like as fuel is inserted into the fire port 6 via a wind tunnel 61. This wind tunnel 61
A fan housing 8 is connected to the fan housing 8, and a Shirotsuko-type air supply fan F is connected to the fan housing 8.
is installed inside the housing 8, and a fan drive motor M is attached outside the housing 8.

The casing B is formed by a bottom frame 9, side plates 10 and a top plate 11 standing upright on the four sides around the bottom frame 9. The top plate 11 is detachably fitted to the upper outer side of the side plate 10, and among the side plates 10,
The front side plate 10a is detachably attached to the other side plate 10 portion. Both left and right edges of the front plate 10a are bent into a channel shape as shown in the second drawing, and there is a gap between the lower edge of the front plate 10a and the front edge of the bottom frame 9, and between the upper edge of the front plate 10a and the top plate 1.
1. There is a combustion air intake port 1 between each leading edge.
2a and 12b are formed. Reference numeral 13 denotes a water stop plate that prevents the suction of rainwater caused by external wind through the suction port 12a, and is mounted on the bottom frame 9. Further, the top plate 11 is provided with a drainage slope that becomes higher toward the front side plate 10a, and a hanging plate portion 11a at the front edge of the top plate 11 is located slightly forward of the front side plate 10a. is formed to be longer than the hanging plate portion on the rear edge side of the top plate 11 to prevent rainwater from being sucked in from the suction port 12b.

The inside of the housing A is constructed as follows.

That is, a combustion chamber 14 of the burner 7 is formed in the inner lower part of the inner cylinder 1, and a baffle body 15 is provided in the upper part of the combustion chamber 14. Furthermore, a cylindrical sound-absorbing tube 16 is integrated above the buffle body 15 and continuous with the buffle body 15. In addition, this sound absorbing cylinder 16 is supported in a detachable manner on a shielding plate 17 mounted on the upper part of the inner cylinder 1 via a plurality of support plates 18 in the circumferential direction attached to the shielding plate 17. When cleaning 15, use the shielding plate 17.
The structure is such that the sound absorbing cylinder 16 and the buff-full body 15 can be removed as one piece from the inner cylinder 1 by lifting.

As shown in the figure, the buff-full body 15 is formed of a cylindrical body 15b with a lid 15a that is open at the bottom, and a plurality of circumferential ventilation holes 19 are provided in the body of the buff-full body 15, that is, in the side wall of the cylinder body 15b. ... are formed in two stages, upper and lower, and a first annular passage 20 is formed between the outer circumferential surface of the body of the buff-full body 15 and the inner circumferential surface of the inner cylinder 1. Furthermore, an annular bulge 15c having an outer diameter several millimeters smaller than the inner diameter of the inner cylinder 1 is formed at the lower end of the buff-full body 15. The sound-absorbing cylinder 16 is formed of a cylindrical body 16a that is fitted into the buff-full body 15 and fixed to the buff-full body 15 by suitable means such as screwing or welding, and a sound-absorbing material 16b attached to the outer periphery of the cylindrical body 16a. A second annular passage 21 connected to the first annular passage 20 is formed between the outer peripheral surface of the sound absorbing material 16b and the inner peripheral surface of the inner cylinder 1. A cylindrical body 22 having a smaller diameter than the inner diameter of the sound absorbing tube 16 and having a lower opening located near the upper opening of the sound absorbing tube 16 is fixed to the center of the shielding plate 17 in a penetrating manner,
A ventilation passage 23 is formed by the cylinder 22 . In this way, the cylinder 22 forming the ventilation passage 23 of the shielding plate 17 has a smaller diameter than the sound-absorbing cylinder 16, and the lower opening of the cylinder 22 hangs down close to the upper opening of the sound-absorbing cylinder 16. In this case, heat radiation loss during shutdown can be suppressed. That is,
When combustion in the burner 7 is stopped, the air in contact with the inner cylinder 1 is heated by the hot water stored in the water tank 3, and cold air from the outside flows into the case A due to a draft effect due to the density difference. , warm air rising along the inner cylinder 1 stays on the outer periphery of the cylinder 22, resulting in heat radiation loss (reduction in hot water temperature) due to draft action.
is suppressed. Although not shown, the cylindrical body 22
If the lower end side of the sound absorbing tube 16 is extended and the lower opening of the outer circumferential tube 22 is located within the upper opening of the sound absorbing tube 16, the above effect will be even more remarkable.

Further, a sound-absorbing box 24 having a larger opening area than the air passage 23 is attached to the upper part of the shielding plate 17, and a sound-absorbing plate 25 is provided inside the sound-absorbing box 24 at a position facing the upper part of the air passage 23. There is. This sound absorption board 25
is attached to the sound absorbing box 2 via a suitable support piece (not shown).
4, and a sound absorbing material 25b attached to the lower surface of the metal plate 25a.As shown in FIG. A wire 25d having a portion 25c is connected to a metal plate 25a and a sound absorbing material 25b.
and the presser foot 25e, and in this state the wire d
This is done by bending the lower end and locking the lower surface of the sound absorbing material 25b.

The exhaust pipe top C is formed by an exhaust pipe 26 for connection, a large-diameter exhaust pipe 27 that opens upward and downward, and a wind direction plate 28 inserted into the exhaust pipe 27. , is formed by joining a conical plate with a larger diameter than the connecting exhaust pipe 26 and an inverted conical plate, and rainwater flowing down the upper surface of the conical plate is inverted at this joint. A water first ring 29 is provided to prevent the pipe from falling into the connecting exhaust pipe 26 along the conical plate.

In FIG. 1, broken line arrows indicate the flow of combustion air, and solid line arrows indicate the flow of combustion gas.

According to the above configuration, since the inside of the baffle body 15 is used as a part of the combustion chamber 14, the actual volume of the combustion chamber 14 relative to the output of the burner 7 is large compared to the dimensions of the housing A, and the combustion chamber 14 is good and Since a stable combustion state is obtained and the pressure increase in the combustion chamber 14 is suppressed, the static pressure of the air supply fan F does not increase unduly, and burner noise is reduced.

Furthermore, since the buff-full body 15 is formed by the cylinder body 15b with a lid, the high-temperature combustion gas flows along the inner circumferential surface of the inner cylinder 1 through the vent hole 19 in the body of the buff-full body 15. , and Batsuful body 1
5, the high temperature combustion gas flowing through the first annular passage 20 on the outer periphery of the baffle body 15 flows directly through the second annular passage on the outer periphery of the sound absorbing cylinder 16, and then flows along the inner cylinder 1. It will rise.

Therefore, the heat transfer area of the inner cylinder 1 is effectively utilized, heat transfer through contact with high-temperature combustion gas is carried out sufficiently, the heat transmission coefficient is increased, and burner noise and combustion gas passing noise are also reduced. It is.

In the above embodiment, the cylindrical body 15b of the buff-full body 15 is formed in a cylindrical shape with a uniform diameter over the entire length of the upper and lower sides. The flow rate of combustion gas in the annular passage 20 increases as it goes upwards, and the flow resistance increases accordingly. Therefore, in order to keep the flow rate of combustion gas almost constant, the diameter of the passage body 15b is made smaller toward the upper end. It may be configured and implemented to reduce an increase in flow resistance due to an increase in flow by forming the flow.

Further, the ventilation hole 19 may be opened in the radial direction of the cylinder 15b, but for example, the ventilation hole 19 may be opened in the radial direction of the cylinder 15b.
The ventilation holes 19 are formed in the cylindrical body 15b by punching or the like.
If the combustion gas exiting the vent hole 19 is opened in the tangential direction of the cylinder body 15b and rises while swirling around the cylinder body 15b, heat transfer through contact with the inner surface of the inner cylinder 1 can be carried out more efficiently. It is.

As described above, the present invention includes attaching a buttful body consisting of a cylindrical body with a lid and opening the bottom surface to the upper part of a combustion chamber, providing a plurality of ventilation holes in the body of the buttful body, and Since a sound-absorbing cylinder is provided above the buff-full body that is continuous with the buff-full body, the inside of the buff-full body can be used as a part of the combustion chamber, and the combustion gas flows through the plurality of vent holes provided in the buff-full body to the inner cylinder side. This allows for effective heat exchange between the combustion gas and the water in the water tank, allowing for a large combustion chamber volume for the burner output without increasing the size of the casing. Since a combustion state is obtained and the combustion chamber is substantially enlarged, the internal pressure of the combustion chamber can be lowered, noise can be reduced, and heat exchange can be improved. Moreover, since the combustion gas blown into the first annular passage by the buff-full body directly flows into the second annular passage formed by the sound absorbing cylinder and the inner cylinder, the heat transfer area of the inner cylinder is reduced. can be used more effectively and can be muted,
Furthermore, since the buff-full body and the sound absorbing tube are installed in succession, there is no waste of space.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the hot water boiler according to the present invention, with FIG. 1 being a longitudinal side view, FIG. 2 being a cross-sectional front view of the casing showing the combustion air inlet, and FIG. 3 being a cross-sectional view of the casing. , Fig. 4 is a sectional view of installing the sound absorbing material, Fig. 5 is a partially cutaway front view showing a conventional example, and Fig. 6 is a partially cutaway front view showing a conventional example.
The figure is a vertical cross-sectional perspective view showing another conventional example. 1...Inner cylinder, 2...Outer cylinder, 3...Aquarium, 14...
...Combustion chamber, 15...Buffed body, 16...Sound absorbing tube, 19...Vent hole, 20...First annular passage, 2
1...Second circular passage.

Claims (1)

[Scope of utility model claims] A housing consisting of an inner cylinder 1 and an outer cylinder 2 is formed, a water tank 3 is provided between the inner cylinder 1 and the outer cylinder 2 of the housing, and a combustion chamber 14 is provided in the lower part of the inner cylinder 1. At the top of the combustion chamber 14, a buffful body 15 consisting of a cylindrical body with a lid whose lower surface is open and whose outer diameter is slightly smaller than the inner diameter of the inner cylinder 1 is attached. In addition to providing air holes 19, a cylindrical sound absorbing tube 16 is provided above the buffful body 15 and continuous with the buffful body 15, so that the buffful body 1
A hot water boiler characterized in that first and second annular passages 20 and 21 for combustion gas are formed between the inner cylinder 1 and the sound absorbing cylinder 1.