JP2013096593A - Combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combustion device preventing members arranged in a lower part of a stand from being exposed to high temperature.SOLUTION: The stand 51 having a mounting part 66 is provided inside a casing 10. A combustion case 7 is installed in a space formed in an upper part than the mounting part 66. Non-heat-resistant members 4 such as a resin pipe, a valve, a pump, a resin container, electric equipment and electric wiring are arranged in a space formed in a lower part than a top face part 62. An air layer is provided between a secondary heat exchange case 15 of the combustion case 7 and the mounting part 66 of the stand 51.

Description

  The present invention relates to a latent heat recovery type combustion apparatus. In particular, the present invention relates to a latent heat recovery type combustion apparatus employing a reverse combustion type.

  In recent years, in order to improve the heat exchange efficiency of heat generated when a burner is burned, a latent heat recovery type combustion apparatus that recovers even the latent heat of combustion gas has become widespread in the market. Since this latent heat recovery type combustion apparatus mainly recovers heat generated when water vapor in the combustion gas is liquefied, a large amount of drain is generated in a heat exchanger that performs latent heat recovery. And it is known that this drain will show the acidity, the nitrogen oxide produced | generated at the time of combustion melt | dissolves.

Therefore, in the latent heat recovery type combustion apparatus, a heat exchanger that recovers sensible heat and a heat exchanger that recovers latent heat are separately mounted to deal with drainage.
The former heat exchanger that recovers sensible heat is called a primary heat exchanger, while the latter heat exchanger that recovers latent heat is called a secondary heat exchanger.

  It is recommended that the secondary heat exchanger that recovers latent heat be made of bare pipe without fins in the water pipe in order to promote drainage. Further, a drain discharge system such as a neutralizer for discharging drain to the outside is provided at the lower part of the secondary heat exchanger.

By the way, there exists a form called a reverse combustion system as one form of a combustion apparatus (for example, patent document 1).
In other words, the reverse combustion method is one in which the burner is disposed downward. FIG. 20 shows a layout of a typical reverse combustion type combustion apparatus 200.

As shown in FIG. 20, the combustion device 200 has a combustion case 202 disposed substantially at the center of the housing 201. The combustion case 202 has a combustion unit 203, a primary heat exchanger 205, and a secondary heat exchanger 206. Is built-in.
Further, an exhaust cylinder 211 for exhausting combustion gas to the outside is disposed on the left side of the casing 201 of the combustion apparatus 200. Specifically, the exhaust pipe 211 is disposed so as to extend inside and outside the casing 201 of the combustion apparatus 200 and is connected to the upper left side of the secondary heat exchanger 206.

  That is, when combustion gas is generated in the combustion unit 203, the combustion gas first proceeds downward, passes through the primary heat exchanger 205, and flows into the secondary heat exchanger 206. The combustion gas that has flowed into the secondary heat exchanger 206 changes the flow direction of the combustion gas from the lower direction to the upper direction in the secondary heat exchanger 206, passes through the exhaust pipe 211, and is exhausted to the outside. Is done.

  Further, as shown in FIG. 21, the primary heat exchanger 205 and the secondary heat exchanger 206 each include a series of heat receiving pipes 218 through which hot water to exchange heat with the combustion gas flows. A water inlet side pipe 222 and a hot water outlet side pipe 223 located outside 202 form a series of hot water supply systems 220 within the casing 201 of the combustion apparatus. Non-heat-resistant members such as a water amount adjusting valve and a temperature sensor are arranged in the middle of the incoming water side pipe 222 and the outgoing hot water side pipe 223.

  In the combustion apparatus 200, hot water that has passed through the water inlet side pipe 222 flows through the secondary heat exchanger 206, and then flows through the primary heat exchanger 205, so that heat is sequentially exchanged, and then via the hot water outlet side pipe 223. It is supplied toward the hot water supply destination.

  Further, in the combustion case 202, a recovery unit (not shown) that recovers drain generated when the latent heat of the secondary heat exchanger 206 is recovered is provided inside the secondary heat exchanger 206, and the recovery unit A drain discharge system 212 for flowing drain toward the lower side of the combustion apparatus 200 is connected. That is, the drain discharge system 212 is located below the casing 201 with respect to the secondary heat exchanger 206, and includes a neutralizer introduction side pipe 216 that connects a recovery unit (not shown) and the neutralizer 215. The drain external discharge pipe 217 guides the drain neutralized by the neutralizer 215 to the outside.

  By the way, in the case of the combustion apparatus which employ | adopted the reverse combustion system as mentioned above, the combustion case 202 will occupy most of the celestial region improvement part of a combustion apparatus as shown in FIG. In other words, it is necessary to house the members that form the drain discharge system 212 and the hot water supply system 220 in a space other than the combustion case 202. Therefore, conventionally, a frame 225 is provided in the housing 201 to form a space for housing members constituting the drain discharge system 212, the hot water supply system 220, etc., and members constituting the drain discharge system 212, the hot water supply system 220, etc. Is housed. Specifically, the combustion case 202 is placed on the gantry 225, the interior of the casing 201 is partitioned in the vertical direction by the gantry 225, and non-heat-resistant members such as a drain discharge system 212 and a hot water supply system 220 are provided below the gantry 225. Is housed.

  In recent years, combustion apparatuses such as a hot-water supply apparatus tend to be downsized. That is, the space for installing residential equipment has been reduced due to the recent increase in apartment houses and the like. Since it is necessary to install residential equipment in a limited space, there is a high need for a small-sized combustion apparatus from the market. However, in the reverse combustion type combustion apparatus, as described above, most of the casing is occupied by the combustion section and the heat exchanger, so there is no space at the upper position of the casing. Therefore, in order to reduce the size by providing a gantry, non-heat-resistant members such as the drain discharge system 212 and the hot water supply system 220 are packed in the lower part of the gantry to be densely packed. In other words, the non-heat-resistant member is arranged close to or in contact with the gantry.

JP 2010-7968 A

Under such circumstances, the gantry becomes hot as the inside of the combustion case becomes hot during operation, and heat is transferred to the equipment below. That is, when a low heat-resistant member (non-heat-resistant member) such as a water amount adjusting valve or a temperature sensor housed below the pedestal contacts, there is a risk of deterioration due to heat. Moreover, even if it did not contact a mount, the atmosphere of the lower part of a mount became high temperature, and there existed a possibility that the durability of the apparatus accommodated in the lower part of the mount might fall.
As a countermeasure, it is conceivable that the non-heat-resistant member installed at the lower part of the gantry is separated from the gantry. However, if the refractory member is separated from the gantry, the combustion apparatus becomes large, and the market needs cannot be met.

  Therefore, the present invention solves the above-described problems, and an object of the present invention is to provide a combustion apparatus that can prevent a member disposed in the lower portion of the gantry from being exposed to high temperatures.

  The invention according to claim 1 for solving the above-described problem includes a combustion section that generates combustion gas and discharges the combustion gas downward in a casing, and a combustion gas generated in the combustion section. A combustion apparatus having a flow path conversion unit that converts the direction from the top to the bottom direction to the upward direction, and provided with a heat receiving bowl in the flow path conversion unit through which a liquid flows. A mount having a mounting plate portion, the mount being fixed to the casing, and a combustion section and a flow path converting section are located in a space formed above the mounting plate section, and the flow path The conversion unit is fixed to the mounting plate unit, and the space formed below the mounting plate unit includes at least one of resin piping, valves, pumps, resin containers, electrical equipment, and electrical wiring. Between the flow path conversion unit and the mounting plate unit, There is a gap over a constant area in a combustion apparatus, wherein an air layer is formed.

According to the configuration of the present invention, at least one of a resin pipe, a valve, a pump, a resin container, an electric device, and an electric wiring is disposed in the space formed below the mounting plate portion. .
That is, members having low heat resistance such as resin pipes, valves, pumps, resin containers, electrical equipment, and electrical wiring are disposed in a space formed below the mounting plate portion. As mentioned above, when the combustion device is operated, the temperature in the combustion part becomes high, and heat is transferred to the mounting plate part via the flow path conversion part, so that the gantry becomes high temperature. There is a risk of exposure and deterioration.
However, according to the configuration of the present invention, an air layer is formed because there is a gap between the flow path conversion unit and the mounting plate unit over a predetermined region. In the region, heat transfer between the flow path conversion unit and the mounting plate unit can be prevented. Therefore, as a whole, heat transfer to the space formed below the placement plate portion can be reduced. In other words, since the space formed below the mounting plate portion can be prevented from being exposed to high temperatures, for example, even in a reverse combustion type combustion apparatus, the space formed below the mounting plate portion can be It is possible to install resin pipes, valves, pumps, resin containers, electrical equipment, and electrical wiring that are vulnerable to heat and downsize the combustion device.

  According to the second aspect of the present invention, the flow path conversion unit has a gas introduction port into which the combustion gas is introduced and a gas discharge port through which the combustion gas is discharged, and the combustion gas is converted from the gas introduction port to the flow passage. Part of the bottom surface of the flow path conversion part is fixed to the mounting plate part, and the bottom surface of the flow path conversion part is in the flow direction of the combustion gas. The combustion apparatus according to claim 1, wherein the combustion apparatus is inclined in a direction in which the downstream side is downward.

According to the configuration of the present invention, the flow path conversion unit has a gas introduction port into which the combustion gas is introduced and a gas discharge port through which the combustion gas is discharged, and the combustion gas flows from the gas introduction port to the flow channel conversion unit. And flows to the gas outlet. In other words, the high-temperature combustion gas introduced from the gas inlet is deprived of heat by the liquid in the heat receiving bowl in the flow path conversion portion and discharged from the gas outlet. That is, the temperature of the fuel gas decreases from the gas inlet to the gas outlet.
And according to the structure of this invention, a part of bottom face part of a flow-path conversion part is fixed with respect to the mounting plate part of a mount, and the bottom face part of a flow-path conversion part follows the flow direction of combustion gas. And the downstream side is inclined downward. In other words, the bottom surface portion of the flow path conversion portion is inclined downward in the flow direction of the combustion gas, and the downstream portion thereof is fixed on the mounting plate portion of the gantry. That is, the mounting plate portion of the gantry is fixed on the downstream side where the temperature of the fuel gas is lowered, and a gap is formed on the upstream side where the temperature of the fuel gas is high, thereby forming an air layer. Therefore, the amount of heat transfer between the flow path conversion unit and the mounting plate unit can be reduced, and the space formed in the lower part of the mounting plate unit can be further lowered in temperature.

  According to a third aspect of the present invention, the housing has a front lid that can be removed on the front side, and there is an engaging portion between the mounting plate portion and the flow path converting portion. The joint portion prevents the flow path conversion unit from moving upward, but allows the flow path conversion unit to move toward the front lid side direction and the back side direction, and the flow path conversion unit is mounted from the front lid side. The engagement portion is engaged by moving it to the back side of the body, and conversely, the engagement is released by moving the flow path conversion portion from the back side of the housing toward the front lid body side. 3. The combustion apparatus according to claim 1, wherein there is a fixing member that fastens the surface of the flow path conversion unit on the front lid side and the mount.

According to the structure of this invention, the said engaging part engages by moving a flow-path conversion part from the front cover body side to the back side of a housing | casing, and conversely toward the front cover body side from the back | inner side of a housing | casing. The engagement is released by moving the flow path converter. In other words, the placement plate part of the gantry and the flow path conversion part are fixed by sliding the flow path conversion part from the front lid side to the back side of the housing. On the other hand, the placement plate part and the flow path conversion part of the gantry are removed by sliding the flow path conversion part from the back side of the housing toward the front lid side. That is, there is no need to lift when installing the flow path conversion unit on the mounting plate part of the gantry, and there is no need to lift when removing the flow path conversion unit from the mounting plate part of the gantry. It is possible to work even with a weak worker when attaching or detaching. In addition, work efficiency is high because it can be attached or detached by an easy operation.
In addition, according to the configuration of the present invention, since there is a fixing member that fastens between the front lid side surface of the flow path conversion unit and the gantry, during normal use, the lid side direction and the back side direction are directed. The movement of the flow path conversion unit can be restricted.

  Further, the mounting plate portion has an opening that communicates the upper surface side and the lower surface side of the mounting plate portion, and a cantilevered engagement piece that engages with the opening is provided at the bottom of the path conversion portion. (Claim 4).

  In the fifth aspect of the present invention, the engagement piece has a distance maintaining part that maintains a distance between the flow path converting part and the mounting plate part, and the distance maintaining part mounts the flow path converting part. The combustion apparatus according to claim 4, wherein the combustion apparatus is maintained in a posture inclined with respect to the mounting plate portion.

  According to the configuration of the present invention, since the engagement piece has the interval maintaining portion that maintains the interval between the flow path conversion portion and the mounting plate portion of the gantry, the formation of the air layer is easy.

  The neutralization device for neutralizing the drain generated in the flow path conversion unit is disposed below the mounting plate unit, and the mounting plate unit includes a front lid. It has a notch groove extending from the body side to the back side of the housing, and the neutralizer introduction side pipe connecting the flow path conversion part and the neutralizer is movable along the extending direction of the notch groove (Claim 6).

  According to the configuration of the present invention, since there is a gap over the predetermined region between the flow path conversion unit and the mounting plate unit and an air layer is formed, the lower part than the mounting plate unit. Heat transfer to the formed space can be reduced. Therefore, it is possible to prevent the members arranged at the lower part of the gantry from being exposed to high temperatures.

It is a perspective view of the combustion apparatus of the embodiment of the present invention. It is a front view of the combustion apparatus of an embodiment of the present invention, and has removed the front lid. It is a perspective view which shows the positional relationship of the secondary heat exchanger of FIG. 2, and a mount frame. It is a disassembled perspective view of the secondary heat exchanger of FIG. It is a perspective view of the case main body of FIG. It is a top view of the case main body of FIG. It is the perspective view seen from another visual field of the case main body of FIG. It is a perspective view of the mount frame of FIG. It is a perspective view of the space | interval maintenance member of FIG. It is BB sectional drawing of the space | interval maintenance member of FIG. It is a side view of the space | interval maintenance member of FIG. FIG. 10 is a perspective view of the fixing member of FIG. 9. It is a perspective view which shows the state which attaches a fixing member to the case main body of FIG. It is a perspective view which shows the state which attaches a space | interval maintenance member to the case main body of FIG. It is explanatory drawing which shows the state which attaches a fixing member to the mount frame of FIG. It is explanatory drawing which shows the state which attached the fixing member to the mount frame of FIG. It is explanatory drawing which shows the positional relationship of the mount frame of FIG. 16, and a case main body. It is explanatory drawing which shows the state which attaches a fastening element to the mount frame of FIG. It is a perspective view which shows the modification of a mount frame. It is explanatory drawing which shows the basic layout of the combustion apparatus of a reverse combustion system. It is an operation principle diagram of the prior art and this embodiment.

Below, the combustion apparatus 1 which concerns on 1st Embodiment of this invention is demonstrated.
The combustion apparatus 1 of the present embodiment is specifically a hot water supply apparatus, and includes a hot water supply system 220 as in the conventional case. The combustion device 1 includes a combustion unit 2 that generates combustion gas, a primary heat exchanger 3 that recovers sensible heat, and a secondary heat exchanger 5 that recovers latent heat, a so-called latent heat recovery type combustion device. It is.
The basic layout of the external appearance of the combustion apparatus 1 is the same as that of the prior art, and is formed by the front lid body 9 and the housing 10 as shown in FIG. That is, the front surface of the housing 10 is closed by the front lid body 9.
The basic layout inside the combustion apparatus 1 is the same as that of the prior art, and includes a combustion part 2 and an exhaust pipe 6 erected in parallel with the combustion part 2 in the width direction (left-right direction). ing.

First, the main configuration of the combustion apparatus 1 will be described.
As shown in FIGS. 2 and 3, the combustion apparatus 1 divides the space in the housing 10 in the vertical direction with reference to the gantry 51. That is, the inside of the housing 10 is divided into a heating area 41 positioned above and a storage area 43 positioned below, with the top surface portion 62 of the gantry 51 as a reference. A combustion case 7 is mainly disposed in the heating region 41, and a drain discharge system 212 such as a neutralizer 215 and a primary heat exchanger 3 and a secondary heat exchanger are mainly disposed in the storage region 43 as in the conventional case. A water inlet side pipe 222 and a hot water outlet side pipe 223 (see FIG. 22) connected to the heat receiving pipe 5 are arranged.

  First, when looking at the heating region 41 above the gantry 51, the combustion apparatus 1 has a combustion case 7 disposed substantially at the center of the housing 10 as shown in FIG. And the primary heat exchanger 3 and the secondary heat exchanger 5 are incorporated. Specifically, the combustion case 7 includes a burner side case 11, a substantially rectangular parallelepiped primary heat exchange case 12 that is long in the height direction (vertical direction), and a secondary heat exchange that is long in the width direction (left and right direction). The case 15 is formed so as to be connected to communicate with each other inside. The burner side case 11 constitutes a part of the combustion section 2, the primary heat exchange case 12 constitutes a part of the primary heat exchanger 3, and the secondary heat exchange case 15 constitutes the secondary heat exchanger 5. Part of

An exhaust cylinder 6 for exhausting combustion gas to the outside is disposed on the left side in the width direction w of the casing 10 of the combustion apparatus 1. Specifically, the exhaust cylinder 6 is disposed so as to extend inside and outside the housing 10 of the combustion apparatus 1 and is connected to the upper left side of the secondary heat exchange case 15.
That is, the combustion case 7 forms a combustion gas flow path 8 connected to the exhaust pipe 6 from the combustion part 2 as indicated by an arrow in FIG. And the combustion gas flow path 8 can distribute | circulate the combustion gas produced | generated in the combustion part 2 to the exhaust pipe 6 by changing the flow direction of a combustion gas from a height direction lower direction to an upper direction. .

  The combustion unit 2 is a so-called reverse combustion type combustion unit, and forms a flame downward by a burner (not shown). The combustion unit 2 includes a fuel spray nozzle, a combustion cylinder, and the like (not shown) as well as known ones.

In other words, when the liquid fuel burns in the combustion section 2 and combustion gas is generated, the combustion gas is exhausted to the outside through the combustion gas flow path 8. Specifically, the generated combustion gas first proceeds downward, passes through the primary heat exchanger 3, and flows into the secondary heat exchanger 5. Then, the combustion gas flowing into the secondary heat exchanger 5 changes the flow direction of the combustion gas from the lower direction to the upper direction in the secondary heat exchanger 5, passes through the exhaust pipe 6, and is exhausted to the outside. Is done.
In addition, the combustion apparatus 1 of this embodiment has an air blower which is not shown in figure, the air required for combustion is supplied with the air blower, and also the combustion gas produced | generated by the combustion part 2 is flowed downward.

  The primary heat exchanger 3 is a known gas / liquid heat exchanger, and is disposed downstream of the combustion unit 2 in the flow direction of the combustion gas. The primary heat exchanger 3 includes a copper heat receiving pipe through which hot water flows and fins (not shown). That is, the combustion gas that has reached the primary heat exchanger 3 can exchange heat with the fin in addition to the heat receiving pipe, so that hot water flowing through the heat receiving pipe is efficiently heat exchanged. Further, the primary heat exchange case 12 penetrates in the height direction.

The secondary heat exchanger 5 has a heat receiving pipe 32 (see FIG. 3) through which hot water to exchange heat with the combustion gas flows. The heat receiving pipe 32, the heat receiving pipe of the primary heat exchanger 3, the incoming water side pipe 222 and the outgoing hot water side pipe 223 form a series of hot water supply systems 220 (see FIG. 22) in the casing 10 of the combustion apparatus 1. Forming.
Specifically, from the upstream side of the hot water flow direction, the incoming water side pipe 222, the heat receiving pipe 32 of the secondary heat exchanger 5, the heat receiving pipe of the primary heat exchanger 3, and the hot water outlet side pipe 223 are connected in series. Yes. That is, in the combustion apparatus 1, the hot water that has passed through the water inlet side pipe 222 flows through the secondary heat exchanger 5 and then flows through the primary heat exchanger 3, so that heat is sequentially exchanged, and then the hot water side pipe 223. It is supplied toward the hot water supply destination. In other words, the hot water that has passed through the water inlet side pipe 222 flows upward in the vertical direction.

The secondary heat exchanger 5 is disposed below the primary heat exchanger 3 and directly communicates with both the primary heat exchanger 3 and the exhaust pipe 6.
That is, the secondary heat exchanger 5 has a space extending in the width direction of the combustion device 1 (the left-right direction w in FIG. 2) inside the secondary heat exchange case 15. The secondary heat exchanger 5 is also in communication with the exhaust pipe 6 disposed on the side (left side in the width direction w) of the combustion unit 2. Therefore, the secondary heat exchanger 5 allows the combustion gas flowing downward in the combustion section 2 to flow from the primary heat exchanger 3 side, and causes the combustion gas to flow toward the exhaust pipe 6. That is, the secondary heat exchanger 5 can be turned up so that the flow direction of the combustion gas flowing downward is directed upward.

On the other hand, when looking at the storage area 43 below the gantry 51, a drain discharge system 212 and a part of the hot water supply system 220 are arranged between the gantry 51 and the bottom surface of the housing 10 as shown in FIG. Yes. Specifically, a neutralizer 215 is provided on the bottom surface of the housing 10. A neutralizer introduction side pipe 216 connecting the recovery unit (not shown) and the neutralizer 215 is connected to the upper portion of the neutralizer 215, and the neutralizer 215 neutralizes the lower portion of the neutralizer 215. A drain external discharge pipe 217 that guides the drain that has been discharged to the outside is connected. That is, the drain discharged from the secondary heat exchanger 5 is introduced into the neutralizer 215 via the neutralizer introduction side pipe 216 and is neutralized in the neutralizer 215. Then, it is discharged from the neutralizer 215 to the outside through the drain external discharge pipe 217.
Further, the neutralizer 215 of this embodiment is connected to a neutralizer water supply pipe (not shown) through which hot water supplied from a water supply source passes so as to reliably form a water seal in the neutralizer 215. Yes.

  In addition, in the space between the neutralizer 215 and the gantry 51, a part of the incoming water side pipe 222 and the outgoing hot water side pipe 223 are arranged. That is, the non-heat-resistant member 4 is arranged in the space between the neutralizer 215 and the gantry 51 as shown in FIG. Examples of the non-heat-resistant member 4 include members constituting the drain discharge system 212, the hot water supply system 220, and the like, for example, resin piping, valves, pumps, resin containers, electrical equipment, electrical wiring, and the like.

That is, the non-heat-resistant members 4 constituting the drain discharge system 212, the hot water supply system 220, and the like are concentrated in the space below the gantry 51 and above the neutralizer 215. Therefore, heat may be transferred from the secondary heat exchange case 15 to the gantry 51, and the space below the gantry 51 may become high temperature.
Therefore, the present invention is characterized by the structure of the secondary heat exchanger 5 and the gantry 51, particularly the structure of the secondary heat exchange case 15 and the gantry 51.

Hereinafter, the secondary heat exchanger 5 and the gantry 51 which are the features of the present embodiment will be described in more detail.
In the following description, unless otherwise specified, the positional relationship between the top, bottom, left, and right is described based on the normal installation position (FIG. 3). That is, the back direction of the housing 10 from the front lid 9 side is the front-rear direction.
As shown in FIGS. 3 and 4, the secondary heat exchanger 5 includes a secondary heat exchange case 15 and a pipe member 16. The secondary heat exchange case 15 is a rectangular box formed by a case main body 17, a lid member 18, and a part of the pipe line member 16.

The case body 17 is made of a material resistant to rust such as stainless steel, and is formed of a bottom surface portion 21 and three peripheral wall portions 22, 23, 24 as shown in FIGS.
The bottom surface portion 21 is a plate material having a rectangular shape in plan view. The bottom surface portion 21 is provided with a gentle slope to collect drainage. The bottom surface portion 21 is provided with a groove (not shown) for guiding the drain. Further, a neutralizer introduction side pipe 216 for draining is connected to the bottom surface portion 21. The neutralizer introduction side pipe 216 is a member that discharges drain to the neutralizer 215 (see FIG. 2). The neutralizer introduction side pipe 216 is located on the peripheral wall portion 23 side as shown in FIG. Specifically, it is located in the vicinity of the corner formed by the peripheral wall portion 22 and the peripheral wall portion 23. In other words, it is provided on the downstream side in the fuel gas flow direction when the combustion apparatus 1 is operated. That is, the neutralizer introduction side pipe 216 is a projection surface from above the gas introduction port 26 (on the primary heat exchanger 3 side) of the lid member 18 when the secondary heat exchanger 5 as shown in FIG. It deviates from the above, and is located on the projection surface from the upper side (exhaust tube 6 side) of the gas outlet 27 of the lid member 18. Therefore, since the combustion gas introduced from the gas inlet 26 does not directly hit the neutralizer introduction side pipe 216, the wind pressure of the fuel gas applied to the neutralizer introduction side pipe 216 can be reduced. Thereby, the water seal height required for the neutralizer 215 can be reduced. That is, the height of the neutralizer 215 can be reduced.

The peripheral wall portions 22 and 24 form a peripheral wall on the long side of the case body 17 as shown in FIG.
Positioning protrusions 60a and 60b are provided at substantially the center of the outer surface of the peripheral wall 22 as shown in FIG. The positioning protrusions 60a and 60b are arranged in parallel in the width direction w. The positioning protrusion 60a and the positioning protrusion 60b have different sizes. Specifically, the size of the positioning protrusion 60b located on the right side in the width direction w is larger than the size of the positioning protrusion 60a located on the left side in the width direction w in FIG. Further, between the positioning protrusions 60a and 60b, fixing holes 76a and 76b capable of fixing a known fastening element are provided.
Positioning protrusions 61a and 61b are provided at substantially the center of the outer surface of one peripheral wall 24 as shown in FIG. The positioning protrusions 61a and 61b are arranged in parallel in the width direction w. The positioning protrusion 61a and the positioning protrusion 61b have different sizes. Specifically, the size of the positioning projection 61b located on the right side in the width direction w is larger than the size of the positioning projection 61a located on the left side in the width direction w in FIG. Further, between the positioning protrusions 61a and 61b, fixing holes 77a and 77b capable of fixing a known fastening element are provided.

  As shown in FIG. 5, the peripheral wall portion 23 is located between the peripheral wall portions 22 and 24 described above, and forms a peripheral wall on one short side of the case body 17.

Next, the lid member 18 will be described.
The lid member 18 is a substantially rectangular lid having a gas inlet 26 and a gas outlet 27 as shown in FIG.
The gas inlet 26 is an opening through which the combustion gas that has flowed down from the combustion section 2 through the combustion gas flow path 8 (see FIG. 2) when the combustion apparatus 1 is operated is introduced into the secondary heat exchange case 15. The gas inlet 26 is a rectangular opening.

  The gas inlet 26 is provided at a position according to one short side of the lid member 18. More specifically, the gas inlet 26 is formed at a position close to the water inlet side header 30 and the water outlet side header 31 side of the pipe line member 16. With reference to the case body 17, the gas inlet 26 is formed at a position on the opposite side of the peripheral wall portion 23.

The gas discharge port 27 is an opening through which the combustion gas exchanged in the secondary heat exchange case 15 is discharged to the exhaust tube 6. The gas outlet 27 is a substantially rectangular opening, and its area is smaller than that of the gas inlet 26 described above.
The gas outlet 27 is formed at a position away from the water inlet side header 30 side and the water outlet side header 31 side (see FIGS. 4 and 5) of the pipe line member 16. With reference to the case body 17, the gas outlet 27 is formed at a position on the peripheral wall 23 side (see FIG. 4).

  The gas inlet 26 and the gas outlet 27 are formed over almost the entire region of the lid member 18 in the short direction l.

Subsequently, the pipe line member 16 will be described.
As shown in FIG. 4, the pipe line member 16 is an annular heat exchange flow including the plurality of (six in this embodiment) heat receiving pipes 32, the water inlet header 30, and the water outlet header 31. Road. Further, the pipe member 16 is provided with a wall surface member 33 constituting a short side wall surface of the secondary heat exchange case 15.

If it demonstrates sequentially, the inflow side header 30 will be connected to the one end side of each heat receiving pipe 32, and the outflow side header 31 will be connected to the other end side. The heat receiving pipe 32 is formed of a pipe having excellent thermal conductivity and a smooth surface. That is, the heat receiving pipe 32 is a so-called bare pipe. Further, the heat receiving tubes 32 are arranged in parallel at regular intervals. The intervals between the heat receiving tubes 32 are equal.
As shown in FIG. 4, each heat receiving pipe 32 of the pipe line member 16 is divided into a main body part 35 that mainly performs heat exchange and an entrance / exit pipe part 36.
The main body portion 35 is a portion that constitutes an elliptical loop when seen in a plan view, constitutes a spiral structure, and the elliptical portions overlap in five steps.

  On the other hand, the entrance / exit pipe part 36 is composed of an exit side pipe part 45 and an entrance side pipe part 46. The outlet side header 31 is connected to the proximal end of the outlet side pipe part 45, and the inlet side header 30 is connected to the end of the inlet side pipe part 46.

The above-described outlet side pipe part 45 and the inlet side pipe part 46 are parallel to the bottom surface part 21 of the case body 17 as shown in FIG. The plane including the bundle of the heat receiving tubes 32 and the plane including the bundle of the heat receiving tubes 32 of the inlet side pipe portion 46 are parallel to each other.
Further, there is a height difference between the outlet side pipe part 45 and the inlet side pipe part 46. That is, the outlet side pipe part 45 is in the upper part and the inlet side pipe part 46 is in the lower part.

As shown in FIG. 4, the outlet tube portion 45 and the inlet tube portion 46 are inserted through the wall surface member 33.
The above is the description of the configuration of the secondary heat exchanger 5.

Next, the gantry 51 will be described.
As shown in FIG. 8, the gantry 51 on which the secondary heat exchanger 5 is mounted includes a rectangular top surface portion 62, side walls 63 and 64 erected downward from the short side and the long side of the top surface portion 62. , A bending fixing portion 69 is provided. That is, the storage space 65 is partially surrounded by the top surface portion 62, the side wall portions 63 and 64, and the bending fixing portion 69. The storage space 65 can store the non-heat-resistant members 4 such as the drain discharge system 212 and the hot water supply system 220 inside.

A mounting portion 66 that protrudes upward from the top surface portion 62 is provided at a substantially central position of the top surface portion 62 of the gantry 51. The placement portion 66 is formed by a placement surface 67 and walls 68 a to 68 d that connect the four sides of the placement surface 67 and the top surface portion 62. Each of the wall portions 68a to 68d is gently inclined. That is, the mounting surface 67 and the top surface portion 62 are continuous in a step shape via the wall portions 68a to 68d.
The placement surface 67 is inclined with respect to the top surface portion 62. Specifically, the mounting surface 67 is inclined downward from the rear in the front-rear direction l to the front. In other words, the wall portion 68c (the height from the top surface portion 62 to the placement surface 67) located at the rear is higher than the wall portion 68a located at the front. That is, the height decreases from the rear to the front in the front-rear direction, and the top surface portion 62 and the placement surface 67 are close to each other.
The placement surface 67 is inclined downward from the right side to the left side in the width direction w. In other words, the wall portion 68b (height from the top surface portion 62 to the placement surface 67) located on the right side in FIG. 8 is higher than the wall portion 68d located on the left side (side wall portion 63 side). That is, the width is lowered from the right side to the left side in the width direction w, and the top surface portion 62 and the placement surface 67 are close to each other.
That is, it is inclined downward in the direction of the arrow shown in FIG.

Further, the top surface portion 62 of the gantry 51 has a latch receiving portion 70. The latch receiving portion 70 is a portion that can be engaged with the engagement piece 90 of the interval maintaining member 80. Although the latch receiving part 70 is a rectangular hole, as shown in FIG. 8, the engaging wall 72 is provided in the edge of the opening part 71 in the front-back direction l back side. The engagement wall 72 is raised compared to the other top surface portion 62. Specifically, it is raised by the thickness of the engagement piece 90. In other words, an opening formed by the other top surface portion 62 and the inner wall of the engagement wall 72 is formed in a front view. That is, the opening 71 is an opening that communicates the top surface portion 62 in the vertical direction, and is open toward the front in the front-rear direction l. Therefore, the engagement receiving portion 70 can insert the engagement piece 90 of the interval maintaining member 80.
The latch receiving portion 70 is located on the right side in the width direction w from the placement portion 66. If the assembly completion as shown in FIG. 3 is used as a reference, the gas inlet 26 is located.

  A notch groove 73 is provided in the vicinity of the side wall portion 63 of the top surface portion 62 of the gantry 51. The cutout groove 73 has a substantially “U” shape in plan view. The cutout groove 73 extends from the front surface of the top surface portion 62 in the front-rear direction l toward the rear. Specifically, the cutout groove 73 extends in parallel with the side wall portion 63. As shown in FIG. 2, the neutralizer introduction side pipe 216 can be inserted when the assembly is completed.

The bending fixing portion 69 located at the front portion of the gantry 51 is a portion that is bent in a direction intersecting the top surface portion 62. The bending fixing portion 69 has a fixing hole 59 at the substantially center in the width direction w. The fixing hole 59 is a hole capable of fixing a known fastening element.
The above is the description of the configuration of the gantry 51.

Next, the interval maintaining member 80 will be described.
The interval maintaining member 80 is formed by bending a thin metal plate after punching. The interval maintaining member 80 is a member that connects the gantry 51 and the secondary heat exchange case 15. When the combustion apparatus 1 is used, the interval maintaining member 80 is attached, and when the secondary heat exchange case 15 is removed for maintenance or the like, it is detached from the secondary heat exchange case 15 and used.

  As shown in FIG. 9, the interval maintaining member 80 includes a substantially rectangular main body 81, an engaging portion 82 provided on one side of the main body 81, and a fixing portion provided on a side facing the engaging portion 82. 83 and support portions 85 and 86 provided on the remaining sides. The engaging portion 82 and the support portions 85 and 86 are erected downward on the main body portion 81, and the fixing portion 83 is erected upward on the main body portion 81. That is, the engaging portion 82 and the support portions 85 and 86 and the fixing portion 83 extend in the facing direction. As shown in FIG. 10, the overhang length H1 of the right support portion 85 is longer than the overhang length H2 of the left support portion 86. That is, the main body 81 is inclined with respect to a plane including the front end surfaces of the support portions 85 and 86. Specifically, the angle α of the main body 81 with respect to the plane is 1 degree to 3 degrees.

  The engaging portion 82 located in front of the front-rear direction l in FIG. 9 is an engagement piece 90 that can be inserted into a locking receiving portion 70 of the gantry 51 described later, and a connection that connects the main body portion 81 and the engagement piece 90. Part 88. The engagement piece 90 protrudes in a direction intersecting with the connection portion 88 and is connected to the connection portion 88 in a cantilever manner. The interval between the main body 81 and the engagement piece 90 increases from the proximal direction side in the protruding direction (the connection portion 88 side) toward the distal end side. And the angle made by the connection part 88 and the engagement piece 90 is an obtuse angle. Further, the angle β formed between the surface including the front end surface in the protruding direction of the support portion 85 and the surface including the engagement piece 90 shown in FIG. 11 is 5 degrees to 30 degrees. That is, when the secondary heat exchange case 15 is attached to the gantry 51 as shown in FIG. 15, the top surface portion 62 of the gantry 51 can be slid along the front end surface in the protruding direction of the support portions 85 and 86.

The fixing portion 83 located at the rear of FIG. 9 is a substantially rectangular portion, and is bent in a direction intersecting the main body portion 81. Specifically, the fixing portion 83 is bent in a direction orthogonal to the main body portion 81, and is a corner portion formed by the bottom surface portion 21 and the peripheral wall portion 24 of the secondary heat exchange case 15 (see FIG. 7). It is possible to cover.
A plurality of through holes 91 are provided on the distal end side (side facing the main body portion 81) of the fixing portion 83. A known fastening element can be inserted into the through hole 91.
Further, on both sides of the fixing portion 83 in the width direction w, there are positioning holes 92 in which a part of the fixing portion 83 is cut out. The positioning hole 92 is sized to fit the positioning protrusions 61 a and 61 b of the peripheral wall portion 24 of the secondary heat exchange case 15. That is, the opening area of the positioning hole 92 located on the right side in the width direction w is larger than the opening area of the positioning hole 92 located on the left side in the width direction w. When attaching the interval maintaining member 80 to the peripheral wall portion 24 of the secondary heat exchange case 15 as shown in FIG. 14, the positioning protrusions 61a and 61b and the positioning holes 92 corresponding to the positioning protrusions 61a and 61b are different in size. Can prevent the interval maintaining member 80 from being attached in the opposite direction by mistake.

The support portions 85 and 86 bent downward from both sides in the width direction w of the main body portion 81 are portions that maintain the distance between the secondary heat exchange case 15 and the top surface portion 62 of the gantry 51.
The lengths of the support portions 85 and 86 in the projecting direction are gradually shortened from the fixed portion 83 side toward the engaging portion 82 side as shown in FIG. In other words, the front end surfaces of the support portions 85 and 86 are inclined with respect to the surface including the main body portion 81.
The above is the description of the configuration of the interval maintaining member 80.

Next, the fixing member 95 will be described.
The fixing member 95 is a substantially rectangular flat plate as shown in FIG. The fixing member 95 has an inverted “convex” shape when viewed from the front.
A through hole 96 is provided in the upper part of the fixing member 95 (upper part in the longitudinal direction h). A known fastening element can be inserted into the through hole 96. The through holes 96 are provided at positions corresponding to the fixing holes 76a and 76b of the peripheral wall portion 22 of the secondary heat exchange case 15 when the secondary heat exchange case 15 is attached to the gantry 51 as shown in FIG. .
On the other hand, in the lower part of the fixing member 95 (lower part in the longitudinal direction h), there is a through hole 97 as shown in FIG. A known fastening element can be inserted into the through hole 97. The through hole 97 is provided at a position corresponding to the fixing hole 59 (see FIG. 8) of the top surface portion 62 of the gantry 51 when the secondary heat exchange case 15 is attached to the gantry 51 as shown in FIG.
Further, on both sides of the fixing member 95 in the width direction w, there are positioning holes 93 in which a part of the fixing member 95 is cut out. The positioning hole 93 is sized to fit the positioning protrusions 60a and 60b (see FIG. 5) of the secondary heat exchange case 15. That is, the opening area of the positioning hole 93 located on the right side in the width direction w is larger than the opening area of the positioning hole 93 located on the left side in the width direction w in FIG. When attaching the fixing member 95 to the peripheral wall portion 22 of the secondary heat exchange case 15 as shown in FIG. 13, the positioning protrusions 60a and 60b and the positioning holes 93 corresponding to the positioning protrusions 60a and 60b are different in size. It is possible to prevent the fixing member 95 from being attached in the opposite direction by mistake.

Subsequently, in accordance with a general attachment procedure, the positional relationship between the secondary heat exchanger 5 and the gantry 51, particularly the positional relationship between the secondary heat exchange case 15 and the gantry 51, is mainly used with reference to FIGS. I will explain.
For ease of understanding, FIGS. 13 to 19 show only members involved in the connection between the secondary heat exchange case 15 and the gantry 51.

First, as shown in FIG. 13, the fixing member 95 is attached to the peripheral wall portion 22 of the secondary heat exchange case 15 with a known fastening element.
At this time, the positioning protrusions 60 a and 60 b are inserted into the positioning holes 93. In other words, the positioning protrusions 60a and 60b sandwich the fixing member 95. That is, movement in the direction along the joint surface between the peripheral wall portion 22 and the fixing member 95 is restricted. Therefore, when attaching a fastening element, it is hard to shift | deviate and it is easy to position.
The through hole 96 and the fixing holes 76a and 76b communicate with each other, and a fastening element is inserted across the through hole 96 and the fixing holes 76a and 76b.
A part of the fixing member 95 protrudes downward from the peripheral wall portion 22. That is, the lower part of the fixing member 95, more specifically, the vicinity of the through hole 97 protrudes from the peripheral wall portion 22.

Next, as shown in FIG. 14, the interval maintaining member 80 is attached to the peripheral wall portion 24 of the secondary heat exchange case 15 with a known fastening element.
At this time, the positioning protrusions 61 a and 61 b are inserted into the positioning holes 92. In other words, the positioning protrusions 61 a and 61 b sandwich the fixing portion 83 of the interval maintaining member 80. That is, the movement in the direction along the joint surface of the fixed portion 83 of the peripheral wall portion 24 and the interval maintaining member 80 is restricted. Therefore, when attaching a fastening element, it is hard to shift | deviate and it is easy to position.
The through hole 91 and the fixing holes 77a and 77b communicate with each other, and a fastening element is inserted across the through hole 91 and the fixing holes 77a and 77b.
The interval maintaining member 80 covers the peripheral wall portion 24 and the bottom surface portion 21 of the secondary heat exchange case 15. That is, the main body 81 of the spacing member 80 is located below the bottom surface 21.

Next, the secondary heat exchange case 15 to which the fixing member 95 and the interval maintaining member 80 are attached is attached to the gantry 51 by sliding it backward as indicated by an arrow in FIG. Note that the gantry 51 is fixed to the housing 10 in advance.
At this time, the neutralizer introduction side pipe 216 moves along the extending direction of the notch groove 73.
The bottom surface portion 21 is placed on the placement surface 67 of the gantry 51, and the secondary heat exchange case 15 is inclined in the front-rear direction l and the width direction w as shown in FIGS.
Further, as shown in FIG. 16, the engaging portion 82 is engaged with the locking receiving portion 70. Specifically, the engagement piece 90 has entered the opening 71, and the engagement wall 72 is in contact with the connection portion 88. Further, the support portions 85 and 86 are placed on the top surface portion 62 as shown in FIG. 17, and the support portions 85 and 86 allow the gap 98 (hatching in FIG. 17) between the bottom surface portion 21 and the top surface portion 62. ) Is formed. The gap 98 functions as an air layer and prevents heat transfer due to the contact between the bottom surface portion 21 and the top surface portion 62.
The gap 98 is formed at least on the gas inlet 26 side. That is, with reference to the flow of fuel gas when the combustion apparatus 1 is operating, the gap 98 is formed upstream of the secondary heat exchange case 15 in the flow direction of the combustion gas as shown in FIG.

Finally, it fixes with a well-known fastening element like FIG.
At this time, the through hole 97 of the fixing member 95 and the fixing hole 59 of the mount 51 are in communication with each other, and a fastening element is inserted across the through hole 96 and the fixing holes 76a and 76b.

  According to the combustion apparatus 1 of the present invention, a gap is formed between the gantry 51 and the secondary heat exchange case 15, and an air layer is formed. Therefore, in the region where the air layer is formed, the flow path conversion is performed. Heat transfer between the part and the mounting plate part can be prevented. Therefore, as a whole, heat transfer to the space formed below the placement plate portion can be reduced. That is, it is possible to prevent the space formed below the placement portion 66 of the gantry 51 from being exposed to high temperatures.

  In the above-described embodiment, the rectangular hole-shaped locking receiving portion 70 is provided on the gantry 51. However, the present invention is not limited to this, and may be an engagement piece as shown in FIG. In this case, the engagement pieces are engaged with each other.

  In the embodiment described above, a rectangular hole-shaped locking receiving portion 70 is provided on the gantry 51 and the secondary heat exchange case is inclined to form the gap 98 and the air layer. However, the method for forming the air layer is not particularly limited. For example, the bottom surface of the case for secondary heat exchange may be stepped to form a gap and form an air layer.

  In the embodiment described above, the secondary heat exchange case 15 to which the fixing member 95 and the interval maintaining member 80 are attached is slid rearward in a state where the gantry 51 is attached to the housing 10 in advance. The present invention is not limited to this, and any structure may be used as long as it is moved relative to one side in the front-rear direction.

DESCRIPTION OF SYMBOLS 1 Combustion apparatus 2 Combustion part 9 Front cover body 10 Case 15 Case for secondary heat exchange (flow path conversion part)
21 Bottom portion 26 Gas inlet (gas inlet)
27 Gas outlet (gas outlet)
32 heat receiving pipe 51 gantry 62 top surface part (mounting plate part)
65 Storage space 70 Locking receiving portion (engaging portion)
71 Opening (Opening)
73 Notch groove 82 Engagement part 85,86 Support part (space | interval maintenance part)
90 engaging piece 95 fixing member 98 gap 215 neutralizer 216 neutralizer introduction side piping

Claims (6)

A combustion section that generates combustion gas and discharges the combustion gas downward in the housing, and a flow path that converts the direction of the combustion gas generated in the combustion section from the vertical direction to the upward direction. There is a conversion unit, a combustion apparatus provided with a heat receiving soot in the flow path conversion unit through which liquid flows,
Provided with a gantry with a mounting plate inside the housing,
The gantry is fixed to the housing, and a combustion section and a flow path conversion section are located in a space formed above the mounting plate section, and the flow path conversion section is fixed to the mounting plate section. In the space formed below the mounting plate part, at least one of resin piping, valves, pumps, resin containers, electrical equipment, and electrical wiring is arranged,
A combustion apparatus, wherein an air layer is formed between the flow path conversion unit and the mounting plate unit with a gap over a predetermined region. The flow path conversion unit has a gas inlet through which combustion gas is introduced and a gas outlet through which the combustion gas is discharged.
Combustion gas flows from the gas inlet to the gas outlet through the flow path converter,
A part of the bottom surface portion of the flow path conversion portion is fixed to the mounting plate portion, and the bottom surface portion of the flow path conversion portion is inclined in a direction in which the downstream side is downward along the flow direction of the combustion gas. The combustion apparatus according to claim 1. The housing has a removable front lid on the front side,
There is an engagement part between the mounting plate part and the flow path conversion part, and the engagement part prevents the flow path conversion part from moving upward, but the front lid side direction and the back side The flow path conversion part is allowed to move in the direction, and the engagement part is engaged by moving the flow path conversion part from the front lid side to the back side of the housing, and conversely the back side of the housing The engagement is released by moving the flow path conversion unit from the front lid side to
The combustion apparatus according to claim 1, wherein there is a fixing member that fastens a surface between the front cover body side of the flow path conversion unit and the mount. The mounting plate portion has an opening that communicates the upper surface side and the lower surface side of the mounting plate portion,
The combustion apparatus according to any one of claims 1 to 3, wherein a cantilever engagement piece that engages with the opening is provided at a bottom portion of the flow path conversion portion. The engagement piece has an interval maintaining unit that maintains an interval between the flow path conversion unit and the mounting plate unit,
The combustion apparatus according to claim 4, wherein the interval maintaining unit maintains the flow path converting unit in an inclined posture with respect to the mounting plate unit. It has a neutralizer that neutralizes the drain generated in the flow path conversion unit,
The neutralizer is arranged below the mounting plate part,
The mounting plate portion has a notch groove extending from the front lid side to the back side of the housing,
The combustion apparatus according to claim 4 or 5, wherein the neutralizer introduction side pipe connecting the flow path conversion unit and the neutralizer is movable along the extending direction of the notch groove.

Images