JPS5986852A - Hot-water boiler - Google Patents

Abstract

PURPOSE:To contrive the improvement of heat exchanging efficiency, lower the height of a can body, and compact the whole apparatus by a method wherein the heat exchanging between a can body and an exhaust gas is contrived to perform on the inner wall and the outer wall of the can body. CONSTITUTION:A cold water is supplied into the bottom part of a can body 3 from a water supplying pipe 18, raised up to the small diameter part of the upper part of the can body 3 after slightly heated by the periphery wall of a combustion chamber 4. On the other hand, a combustion exhaust gas is introduced into an inner heat exchanging chamber 5 after raised up from the combustion chamber 4, then introduced into an outer heat exchanging chamber 6 through penetrating holes 9 of the can body 3 with a buffer 7. Then the exhaust gas is raised up and introduced into the inner heat exchanging chamber 5 by the regulation of an outer buffer 8. In such a manner, the combustion exhaust gas is alternatively introduced into the outer heat exchanging chamber 6 and the inner heat exchanging chamber 5 through the penetrating holes 9 of the can body 3 by the regulation of the inner buffer 7 and the outer buffer 8. The heat exchanging is performed with an inner wall 1 of the can body 3 at the inner heat exchanging chamber 5, and performed with an outer wall 2 at the heat exchanging chamber 6.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water boiler that increases heat exchange efficiency and is compact.

The structure of the conventional example and its problems A plurality of horizontal baffles are provided in the can body flue, and the exhaust gas flow paths are arranged alternately on the outer periphery of the flue in these horizontal baffles.

However, due to the large diameter of the flue, when exhaust gas passes through the center of the flue, it is less effective in terms of heat exchange function. There are few routes. In addition, thermal efficiency was low because only the inner wall surface of the can was effectively used for heat exchange.

A conventional example will be explained with reference to FIG. 1. 1 is a can forming a water storage portion 2 and a flue 16 inside; 3 is a burner provided at the bottom of the can; Fuel spray nozzle 4. Blow pole 5. A vaporizing tube 7 having a flame hole 6, an auxiliary combustion tube 8 for evaporating fuel. It consists of 9 burner rings. 10 is a baffle for exhaust gas control installed in the flue 15 above the burner 3;
014 is a chimney (
(not shown).

As mentioned above, there are few paths that contribute to heat exchange among the exhaust gas paths, and only the inner wall surface of the can body contributes to heat exchange, so the thermal efficiency is low.

Purpose of the Invention The present invention is intended to eliminate the drawbacks of the conventional method, and at the same time effectively uses both sides of the can body for heat exchange, and at the same time reduces the diameter of the flue to reduce the contribution to heat exchange in the exhaust gas system. The aim is to improve efficiency.

Structure of the Invention In order to achieve the above object, a combustion chamber is provided in the lower part of the cylindrical can body, and the can body is made small in diameter in the upper part of the combustion chamber, and at the same time, internal heat exchange chambers are provided inside and outside the can body.

An external heat exchange chamber is formed, a pan full plate is provided in this heat exchange chamber, and multiple through holes are provided in the can body directly below the baler plate to guide the combustion exhaust gas alternately to the internal heat exchange chamber and the external heat exchange chamber. As a result of this, the height of the can body can be reduced at the same time as the heat exchange efficiency is increased, making it possible to make the entire device more compact.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 2 and 3. Reference numerals 1 and 2 denote inner and outer walls forming a can body 3, and a combustion chamber is provided at the bottom of the can body 3. 4, and the upper part of the combustion chamber 4 is made smaller in diameter to form an internal heat exchange chamber 5 and an external heat exchange chamber 6. 7,
8 is an inner baffle and an outer baffle provided in the inner heat exchange chamber 5 and the outer heat exchange chamber 6, and 9 is an inner baffle and an outer baffle 8.
10 is a through hole provided in the can body directly below, and 10 is a heat insulating material provided around the outer periphery of the external heat exchange chamber. 11 is a burner provided in the combustion chamber 4, and a fuel spray nozzle 12. Combustion air blower 13.
A large number of air injection holes 14 are provided in the peripheral wall installed in the center of the combustion chamber 4.
A cylindrical auxiliary combustion cylinder 16 is provided concentrically with the middle cylinder 15, and the like. 17 is an exhaust pipe that guides exhaust gas to a chimney (not shown). 18 and 19 are water supply pipes and hot water supply pipes of the can body 3.

Next, the present invention will be explained in detail.
The cold water supplied from the water supply pipe 18 to the bottom of the can body 3 by the flame formed in the combustion chamber 1 is slightly heated on the peripheral wall of the combustion chamber 4, and then rises to the small diameter part at the top of the can body 3. On the other hand, the combustion exhaust gas rises from the combustion chamber 4 and is guided to the internal heat exchange chamber 6, passes through the through hole 9 of the can body 3 through the internal baffle 7, and enters the external heat exchange chamber 6. The combustion exhaust gas is regulated by the outer baffle 8 and guided to the internal heat exchange chamber 5.In this way, the combustion exhaust gas passes through the through hole 9 of the can body 3 by the inner baffle 7 and the outer baffle 8, and flows into the external heat exchange chamber 6. Heat exchange room 6
guided alternately. In the internal heat exchange chamber 5, heat exchange is performed on the inner wall 1 of the can body 3, and in the external heat exchange chamber 6, heat exchange is performed on the outer wall 2. In the external heat exchange chamber 6, the combustion exhaust gas directly contacts the exterior, so the temperature rise is prevented by the heat insulating material 1o.The exhaust gas whose temperature has decreased after heat exchange is discharged from the exhaust pipe 14 to the chimney. On the other hand, the high temperature water after heat exchange is supplied through the hot water supply pipe 19.

Effects of the Invention (1) Heat exchange between the can body and the exhaust gas is carried out on the inner and outer walls of the can body, so that high heat exchange efficiency can be obtained.

(2) Since the inner and outer walls of the can can be effectively used as heat exchange areas, the height of the can can be lowered, and the entire device can be made more compact.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional example; FIGS. 2 and 3 are sectional views showing an embodiment of the present invention; FIG.
FIG. 3... Can body, 4... Combustion chamber, 5...
...Internal heat exchange room, 6...External heat exchange room, 7...
...Inner baffle, 8...Outer baffle, 9.
...Through hole. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure/2 7)3 Figure

Claims (1)

[Claims] A combustion chamber is provided at the bottom of the cylindrical can body, and at the top of this combustion chamber, the can body is made smaller in diameter, and at the same time an internal heat exchange chamber and an external heat exchange chamber are formed inside and outside the can body, and a baffle plate is installed in this heat exchange chamber. A hot water boiler with multiple through holes in the can body directly below the baffle plate to guide combustion exhaust gas alternately to an internal heat exchange chamber and an external heat exchange chamber.