JPH07104045B2 - Water heater - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to water heaters. In particular, the invention provides that the combustion products flow directly from the water heater through the outer wall to the outside of the space in which the water heater is installed, and the combustion air is located inside the water heater. The present invention relates to a gas (or oil) -fired water heater of a type that directly flows from the outside of a space into a combustion chamber of a water heater through a sealed passage.

DESCRIPTION OF THE PRIOR ART The water heater according to the present invention uses combustion air sucked directly from the outside and improves the efficiency by preheating the combustion air. Also, in order to guide the flow of combustion air around the outer surface of the inner jacket and the inner surface of the outer jacket 360 degrees,
Pilot outage due to excessive ventilation
e) is significantly reduced. Also, the combustion air space surrounding the wall of the tank provides additional insulation for the water in the tank to further reduce heat loss. To the Applicant's knowledge, none of the prior art water heaters have the advantages described above.

SUMMARY OF THE INVENTION The present invention comprises a watertight tank means (10) comprising a tank wall (12) and a top head member (14) and a bottom head member (16) welded to the wall; below the bottom head member. A combustion chamber (48) located in the combustion chamber (48); a burner means (50) provided in the combustion chamber; and a combustion product extending upward in the watertight tank means (10) from the combustion chamber (48) to the top head. A furnace tube means (18) that is guided upward through a member; a space directly connected to the furnace tube means (18) from which combustion products are generated, Combustion product exhaust means (6
4) and; combustion air transmission means (66) for directly guiding combustion air to the combustion chamber (48) through the outer wall, the first jacket being separated from the tank wall and surrounding the tank wall. A first air passage space (102) between the member (26) and a second jacket member (32) spaced apart from the first jacket member and surrounding the first jacket member; Space between the first and second jacket members (102)
Are arranged concentrically so as to form the first air passage space (102), and a pair of top members (28, 34) fixed to the tops of the first and second jacket members.
Including a third air passage space (100) formed by
A space between the top members is a combustion air transmission means that constitutes the third air passage space (100) through which combustion air penetrates; a water introduction inlet welded to the top head member (14). And a pair of diaphragm members (58, 60) mounted around the inlet fitting (52) and the outlet fitting (54). ,
Each of the diaphragm members is provided with an upper sealing portion (68) and a lower sealing portion (72) at both ends of a substantially cylindrical body portion (70), and the upper sealing portion (68) has an outer top member (68). Said pair of diaphragm members (58, 60) sealingly engaged with said lower sealing portion (72) and said lower sealing portion (72) sealingly engaged with said inlet fitting (52) or outlet fitting (54). And a water heater including.

Therefore, the above configuration of the present invention has the following advantages.

The inlet and outlet fittings 52, 54, and both diaphragm members 58, 60 are all provided on the upper part of the tank, and both the water supply pipe and the drain pipe are simply installed from the outside of the upper part of the tank.
Since it is sufficient to connect the pipe to the above in a small work space from above, for example, in Japanese Utility Model Publication No. 56-2364.
The pipe connecting work is extremely easy as compared with the long size water supply pipe 11 and the drain pipe 12 which require complicated installation work as in No. 3.

Moreover, since it is not necessary to extend the extension portions of the water supply pipe and the drainage pipe to the side of the tank immediately and the side space can be reduced accordingly, the degree of freedom in selecting the location for installing the tank is increased, which is convenient.

The diaphragm members 58, 60 may be substantially cylindrical or conical members that connect the fixtures 52, 54 and the outer top member 34 disposed immediately outside thereof, and therefore, the above-mentioned Japanese Utility Model Publication No. 56-23643. As described above, the diaphragm member may have a short size and a small size in comparison with a large size water supply pipe 11 and a drainage pipe 12 which are large and difficult to inspect and remove. If the pipe is removed, the entire diaphragm can be easily confirmed from the outside of the tank, so inspection and attachment / detachment of the diaphragm is extremely easy, and maintenance is easy.

Since the furnace tube means 18 is directly connected to the combustion product exhaust means 64, the flame tube 1 as shown in Japanese Utility Model Publication No. 56-23643.
The exhaust passage from which combustion product exhaust from 5 is once guided through the space between the tank wall 6 and the inner shell 17 and then inverted at the lower end and further guided upward to the exhaust duct 1 is quite long. On the other hand, as soon as the combustion product exhaust exits the furnace tube means, it reaches the exhaust means, and the length of the exhaust passage after the furnace tube means becomes extremely short. Therefore, since the resistance of the exhaust gas becomes small, in the gas burner of the method of naturally sucking air under the atmospheric pressure as in the present invention, the ventilation to the burner becomes good without delay, and efficient combustion is achieved. This can be done and performance can be improved.

In the above Japanese Utility Model Publication No. 56-23643, the exhaust gas of combustion products is exhausted in comparison with the exhaust gas which once flows outside the tank wall from the upper part to the bottom part and may overheat the entire water heater, especially the bottom part. As soon as it exits the furnace tube means, it reaches the exhaust means, so there is no danger of overheating the water heater by pulling the tank, and safety can be improved. Further, the structure can be simplified by the amount that the inner case is not required.

DESCRIPTION OF THE PREFERRED EMBODIMENT A water heater according to the present invention comprises a liquid tight tank 10 comprising a tank wall 12 and a top head member 14 and a bottom head member 16 welded to the wall. The tank 10 further includes a furnace barrel 18 welded to the bottom head member 16, extending upward through an opening 20 in the top head member 14 and welded to the head member 14.

The tank has a skirt member 22 fixed to the bottom of the tank wall 12.
Have. Around the lower portion of the skirt, a plurality of openings 24 are provided spaced apart from each other. The function of the opening will be described later in detail. The skirt member 22 serves as an extension of the tank wall 12.

A first jacket member 26 is located around and spaced from the tank wall 12. Top and bottom members 28 and 30 are secured to the jacket member. The first jacket member 26 has a plurality of openings 38 spaced about its lower portion, the function of which will be described in detail below.

A second jacket member 32 is spaced from and surrounds the first jacket member 26. Second jacket member 32
The top and bottom members 34 and 36 are fixedly attached.

The space between the wall 12 above the opening 38 and the first jacket member 26 and the space between the tank top 14 and the jacket top 28 are filled with a suitable insulating material 40.

Below opening 38, between first jacket member 26 and second jacket member 32 is filled with a suitable insulating material 42.

The water heater assembly described above is mounted on a base assembly 44, the interior of which is filled with suitable insulation 46.

The combustion chamber 48 is located below the bottom head 16 and a suitably structured gas (or oil) fired burner 50 is provided within the combustion chamber.

The water heater tank 10 is provided with an inlet fitting 52, an outlet fitting 54 and a discharge fitting 56. With a specially designed circle,
The non-metal diaphragm member 58, 60, 62 is the fitting 52, 54,
Mounted around 56.

As clearly shown in FIGS. 1 and 4, the central furnace barrel 18 is connected to the outlet assembly 64 and the jacket top member 34 is connected to the combustion air inlet assembly 66. .

The diaphragm members 58, 60, 62 are of identical construction and each include a grooved upper flange 68, a conical body 70, and a sealing tip 72.

The end 72 of the diaphragm member 62 is sealingly attached to the fixture 56 and the flange 68 is seated in the opening 74 of the second jacket member 32. The end 72 of the diaphragm member 58 is sealingly attached to the fixture 52 and the flange 68 is seated in the opening 76 in the top member 34. The end 72 of the diaphragm 60 is hermetically attached to the fixture 54 and the flange 68 is seated in the opening 78 in the top member 34.

Referring to FIGS. 2, 3 and 4, the outlet assembly 64.
Consists of a curved tubular portion 106 and a straight tubular portion 108. Between one end of the portion 106 and the furnace tube 18, and the portion 106
The joint between the other end and the component 108 is the same. Each joint consists of an outwardly flared end of the tube itself and an inwardly flared member 112 frictionally fitted to the ends of the tubes 106,108. A hot gasket material 114 is located between the flared portions 110, 112.

The ventilation cap assembly 84 (see FIG. 2) includes an exhaust pipe 86,
It is composed of a wind deflector 88 fixed to the end of the tube 86 and an air intake grid member 90 mounted on the outside of the tube 86. Another screen member 116 having a large number of holes 92 is attached to the end of the exhaust pipe 86. The lattice member 9
The zero wall 93 is perforated as indicated at 94. FIG. 2 shows only a representative portion of the holes 92,94.

A groove 109 is provided at one end of the straight pipe portion 108, and an O
A ring-shaped sealing member 111 is seated. The straight portion 108 is telescopically inserted into the exhaust pipe 86, and the O-ring 111 seals the connection portion therebetween.

Combustion air inlet assembly 66 comprises a curved tube section 118, a first straight tube section 120 and a second straight tube section 122. Curved portion 118 is connected to top member 34 at one end. Straight part 120
Has an inwardly reduced diameter end 124 that is press fit into the end of the curved portion 118. A groove 126 is provided at the end of the straight portion 122, in which the sealing synthetic material 128 is retained.
The straight portion 122 extends through the opening 80 in the wall 82 and is telescopically inserted into the portion 120, with a sealing synthetic material 128 sealing the connection between the two portions. The straight part
122 is provided with a flange 130 to secure the straight section 122 to the outside of the wall 82 by suitable fittings (not shown).

From the above description of the outlet assembly 64, the combustion air inlet assembly 66 and the exhaust cap assembly 84, the horizontal spacing of the water heater with respect to the wall 82 is between the vent members 108,86 and the combustion air members 120,122. It can be adjusted to some extent easily due to the retractable relationship of. The aforementioned structure facilitates installation of the water heater.

5 and 6 show an inlet door assembly for a water heater. As shown in FIG. 5, the combustion chamber 48 of the water heater has a removable inlet door assembly 1 consisting of corresponding door members 136 and 138.
34 are provided. The heat insulating member 140 adheres to the back of the door members 136 and 138 in the assembled position.

The door members 136, 138 are provided with outwardly extending flange portions 142, 144. Gasket parts 146,148 are door members 136,1
38 and the inner surfaces of the flange portions 142 and 144. Grooves 150,152 are provided in the gasket portions 146,148 to allow door members to be aligned around the gas pipes 154,156. The gas pipes 154 and 156 are connected to a constant temperature controller (not shown) having a conventional structure. The door member 136 is provided with a monitoring window 158.

FIG. 6 shows the entrance door assembly 134 in the assembled position.
As shown, the door member is removably affixed to the jacket 32 by means of a fixture 160, and the door bulge portion 142,
The 144 are fixed to each other by a fixture 162. The door assembly, when assembled as shown in FIG. 6, effectively seals the combustion chamber 48 from the space in which the water heater is located.

During operation, combustion air from the outside of the building where the water heater is installed is sucked through the holes 94 of the lattice member 90. The combustion air flows in a space 98 between a concentrically arranged exhaust outlet assembly 64 and combustion air inlet assembly 66. From there, combustion air flows radially across the top of the water heater through the space 100 between the jacket top members 28, 34 and the diaphragm members 58, 60 at the inlet fitting 54 and outlet fitting 52. Prevent air leakage.

The combustion air is concentrically arranged on the first and second jacket members 2
The space 102 between 6, 32 continues to flow downward. The diaphragm member 62 blocks air leakage at the exhaust fitting 56.

Combustion air from the space 102 passes through the opening 38 in the first jacket member 26 and the first jacket member 26 and the skirt member.
It flows into the space 104 between 22 and. From the space 104, combustion air flows through the openings 24 in the skirt 22 into the combustion chamber 48. The skirt 22 along with the jacket members 26, 32 seals the combustion chamber 48 from direct entry of air from sources other than the vent cap assembly 84. The flow of the above-mentioned combustion air is shown by a solid arrow in FIG.

Combustion air flowing into the combustion chamber 48 sustains combustion in the burner 50. Combustion products from the burner 50 flow upward from the combustion chamber 48 into the furnace tube 18. The combustion products flow upward through the furnace tube 18, then through the outlet assembly 64, and then the holes 92.
Through the atmosphere. The flow of the aforementioned combustion products is indicated by the dotted arrows in FIG.

Effect of the Invention Since the combustion air is taken in from the outside of the building, there is no influence on the temperature condition of the space where the water heater is installed, that is,
No warm air is removed from the space during the heating period and no chilled air is removed from the space during the cooling period.

The combustion air flowing on the outer surface of the outlet assembly 64 and the outer surface of the first jacket member 26 is preheated, which improves efficiency. Conversely, the combustion products flowing through the outlet assembly 64 are
Being cooled, the combustion products can be discharged directly outside without the need for a conventional chimney.

Finally, since the flow of combustion air is directed downwardly around the outer surface of the first jacket member 26 into the combustion chamber 48, the problem of pilot outage due to excessive ventilation is significantly reduced. In addition, the space for the combustion air that surrounds the jacket 26
102 additionally imparts an adiabatic effect to the water in tank 10 to reduce collateral heat loss.

[Brief description of drawings]

1 is a side view of a water heater constructed according to the present invention, FIG. 2 is an enlarged partial view of a ventilation cap assembly, FIG. 3 is a sectional view taken along line 3-3 of FIG. 4 is a detailed view of the vent pipe and combustion air inlet pipe assembly, FIG. 5 is an exploded perspective view of the water heater inlet door assembly, and FIG. 6 is a perspective view of the inlet door assembly in the assembled position. Reference numerals 10: tank, 12: tank wall, 14 and 16: head member, 18: furnace tube, 20: opening, 22: skirt member, 28, 30: top member and bottom member, 26, 32: jacket member , 48: combustion chamber, 50: burner,
52, 54, 56: Fixture, 58, 60, 62: Diaphragm, 64: Exhaust port assembly, 66: Combustion air inlet assembly, 84: Exhaust cap assembly, 84: Exhaust pipe, 90: Lattice member, 92 : Hole, 134: Entrance door assembly

Claims (3)

[Claims] 1. Watertight tank means (10) comprising a tank wall (12) and a top head member (14) and a bottom head member (16) welded to said wall; located below said bottom head member. A burner means (50) provided in the combustion chamber; a combustion product extending upward in the watertight tank means (10) from the combustion chamber (48) to the top head member; A furnace tube means (18) that is guided upwards through; a combustion product that is directly connected to the furnace tube means (18) from the furnace tube means and an outer wall of a space in which a water heater is installed. Combustion product exhaust means (6
4) and; combustion air transmission means (66) for directly guiding combustion air to the combustion chamber (48) through the outer wall, the first jacket being separated from the tank wall and surrounding the tank wall. A first air passage space (102) between the member (26) and a second jacket member (32) spaced apart from the first jacket member and surrounding the first jacket member; Space between the first and second jacket members (102)
Are arranged concentrically so as to form the first air passage space (102), and a pair of top members (28, 34) fixed to the tops of the first and second jacket members.
Including a third air passage space (100) formed by
A space between the top members is a combustion air transmission means that constitutes the third air passage space (100) through which combustion air penetrates; a water introduction inlet welded to the top head member (14). A fixture (52) and an outlet fixture (54) for extracting hot water, and a pair of diaphragm members (58,60) mounted around the inlet fixture (52) and the outlet fixture (54). ,
Each of the diaphragm members is provided with an upper sealing portion (68) and a lower sealing portion (72) at both ends of a substantially cylindrical body portion (70), and the upper sealing portion (68) has an outer top member (68). Said pair of diaphragm members (58, 60) sealingly engaged with said lower sealing portion (72) and said lower sealing portion (72) sealingly engaged with said inlet fitting (52) or outlet fitting (54). And a water heater including. 2. The water heater according to claim 1, wherein the combustion product exhaust means (64) is the furnace tube means (1).
A water heater including an outlet assembly (64) connected to the upper end of 8) and extending into the opening in the outer wall. 3. The water heater according to claim 2, wherein the combustion air transmission means (66) is the exhaust pipe (64).
A water heater that includes a combustion air inlet assembly that is concentrically arranged around the outside of the chamber and that forms a second air passage space (98) through which combustion air flows.