JP6070364B2 - Hot water storage system - Google Patents

Description

  The present invention relates to a hot water storage and hot water supply apparatus, and more particularly to an apparatus having a structure capable of ensuring the rigidity of an auxiliary heat source machine fixed to an exterior case.

  2. Description of the Related Art Conventionally, hot water storage and hot water supply devices that can generate hot water and store hot water and supply it to a desired hot water supply destination have been put to practical use. This type of hot water storage and hot water supply system is a large-capacity hot water storage tank for storing hot water, a hot water supply pipe connected to the lower part of the hot water storage tank, a hot water supply pipe connected to the upper part, and a lower part of the hot water storage tank via a heat source device. A circulation heating pipe that circulates and heats water to the upper part of the hot water storage tank, an auxiliary heat source device that heats the hot water when the temperature of the hot water stored in the hot water storage tank is insufficient, and the like are provided.

  As the auxiliary heat source machine, a combustion apparatus for burning fuel gas is generally incorporated. This type of combustion device is a blower fan that takes in combustion air from the outside, a plurality of burners that mix and burn combustion air and fuel gas, and heat exchange between the heat of combustion and water to heat water And a heat collecting cylinder for exhausting the exhaust gas after heat exchange to the outside.

  In the above auxiliary heat source machine, not only a combustion apparatus equipped with a sensible heat recovery heat exchanger that utilizes sensible heat of exhaust gas, but also after heat exchange by a sensible heat recovery heat exchanger in order to improve thermal efficiency. A latent heat recovery type combustion apparatus equipped with a latent heat recovery heat exchanger that uses the latent heat of exhaust gas has also been put into practical use.

  By the way, the above-mentioned combustion apparatus is generally composed of a plurality of cans such as a burner can body in which a plurality of burners are housed and a heat exchanger can body in which a heat exchanger is housed. With regard to the can connecting structure for connecting these cans, for example, a structure as disclosed in Patent Document 1 is disclosed. That is, in Patent Document 1, a flange portion is formed at each portion where the burner can body and the heat exchanger can body overlap, and the flange portions are joined together by caulking and joining, thereby heat exchange with the burner can body. A structure in which a container body is connected is disclosed.

JP-A-6-11192

  In the conventional hot water storage and hot water supply apparatus, the auxiliary heat source machine (combustion apparatus) is fixed to a columnar frame member that constitutes an outer case for housing various devices. Generally, the auxiliary heat source machine incorporated in the hot water storage and hot water supply apparatus is not necessarily housed in a dedicated box-shaped case member, and various cans such as a burner can body and a heat exchanger can body constituting the auxiliary heat source machine. In some cases, the outer surface of the body is exposed, and the body is directly fixed to the columnar frame member. However, the columnar frame member has a problem that its rigidity is lower than that of the box-shaped case member.

  Therefore, if the columnar frame member is bent due to vibration caused by earthquake or transportation, the auxiliary body of the auxiliary heat source can be connected to the can body (the connection portion between the burner can body and the heat exchanger can body, the heat exchanger can body Since the stress tends to concentrate on the connecting portion between the exhaust tube and the exhaust collecting cylinder, etc., there is a possibility that the can connecting portion may be damaged. In particular, when the auxiliary heat source machine is a latent heat recovery type, the height of the auxiliary heat source machine increases and the number of can body connection portions increases, so the possibility of damage to the can body connection portion is significantly increased. Therefore, if the number of fixing points between the auxiliary heat source machine and the frame member is increased in order to ensure the rigidity of the auxiliary heat source machine, the number of assembly steps of the hot water storage hot water supply device will increase and it will be difficult to remove the auxiliary heat source machine during maintenance. Problems arise.

  The object of the present invention is to provide a hot water storage and hot water supply apparatus that can secure the rigidity of the auxiliary heat source machine with an easy structure and low cost without increasing the number of fixing points between the frame member and the auxiliary heat source machine. It is to be.

  The hot water storage and hot water supply apparatus according to claim 1 is a hot water storage and hot water supply apparatus including a frame member that forms part of an exterior case, wherein the heat source device for heating the hot water is fixed to the frame member. The heat source unit is composed of a burner unit that burns fuel, a heat exchanger unit that is disposed above the burner unit and exchanges heat between the combustion heat generated by the burner unit and hot water, and an upper part of the heat exchanger unit. And an exhaust collecting cylinder for discharging the exhaust after heat exchange by the heat exchanger section forward, and an upper front end of the exhaust collecting cylinder and a lower rear end of the burner part are directly connected to the frame member. Alternatively, the reinforcing member is provided with a fixing member that connects the lower end portion of the front end of the exhaust collecting cylinder and the front end portion of the heat exchanger portion while being fixed through a fixing bracket.

  According to a second aspect of the present invention, there is provided the hot water storage and hot water supply apparatus according to the first aspect, wherein the heat exchanger section includes a sensible heat recovery heat exchanger and a latent heat recovery heat disposed above the sensible heat recovery heat exchanger. And the reinforcing member connects the lower end portion of the front end of the exhaust collecting cylinder and the upper flange portion of the front end of the case member that houses the sensible heat recovery heat exchanger. .

  According to the first aspect of the present invention, the front end upper part of the exhaust collecting cylinder and the rear end lower part of the burner part are fixed to the frame member directly or via the fixing bracket, and the lower end part of the front end of the exhaust collecting cylinder and the heat exchanger are fixed. Since the reinforcing member for connecting the front end portion of the unit is provided, the exhaust collecting cylinder and the heat exchanger portion can be stably connected by the reinforcing member.

  In other words, when the front end upper part of the exhaust collecting cylinder and the lower rear end lower part of the burner part are fixed to the frame member, if the frame member bends, stress concentrates on the can connecting part between the exhaust collecting cylinder and the heat exchanger part. Because it becomes easier, the reinforcement member improves the connection strength between the exhaust collecting cylinder and the can body connecting portion of the heat exchanger part, thereby preventing the can connecting part between the exhaust collecting cylinder and the heat exchanger part from being damaged. Leakage can be prevented. By simply installing a reinforcing member, the connection strength of the can connecting part can be improved, so that the rigidity of the auxiliary heat source machine can be secured easily and at a low cost. The frame member and the auxiliary heat source machine Since there is no need to increase the number of fixing points, the increase in the number of assembling steps of the hot water storage hot water supply device is suppressed and the maintainability of the auxiliary heat source machine is not impaired.

  According to invention of Claim 2, a heat exchanger part is provided with the heat exchanger for sensible heat collection | recovery, and the heat exchanger for latent heat collection | recovery arrange | positioned at the upper part of this heat exchanger for sensible heat collection | recovery, Since the lower end portion of the front end of the exhaust collecting cylinder and the upper flange portion of the front end of the case member that accommodates the sensible heat recovery heat exchanger are connected, the reinforcing member is attached so as to sandwich the latent heat recovery heat exchanger. By installing, the can body connecting part for connecting the sensible heat recovery heat exchanger and the latent heat recovery heat exchanger and the can connecting part for connecting the latent heat recovery heat exchanger and the exhaust collecting cylinder are strengthened. .

It is a perspective view of the frame member and auxiliary heat source machine of the hot water storage hot-water supply apparatus which concerns on an Example. It is a fragmentary perspective view of a frame member and an auxiliary heat source machine. It is a partial front view of a frame member and an auxiliary heat source machine. It is a schematic block diagram of an auxiliary heat source machine. It is a longitudinal cross-sectional view of an auxiliary heat source machine. It is a fragmentary perspective view from the upper part of the auxiliary heat source machine of the state which removed the exhaust gas collection cylinder. It is a fragmentary perspective view from the lower part of the auxiliary heat source machine of the state which removed the exhaust gas collection cylinder. It is a perspective view of a reinforcing member. It is a front view of a reinforcing member. It is a side view of a reinforcing member.

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

First, the overall configuration of the hot water storage and hot water supply apparatus 1 incorporating a latent heat recovery combustion apparatus as an auxiliary heat source machine will be briefly described.
As shown in FIG. 1, a hot water storage and hot water supply apparatus 1 has functions such as hot water storage, hot water supply, hot water supply to a hot water heating terminal such as a floor heating panel, hot water supply to a bath, and reheating, etc. The auxiliary heat source unit 3 includes various pipes (not shown) such as a water supply pipe, a hot water supply pipe, and a heating circulation pipe, most of which are integrally housed in the exterior case 4.

  The hot water storage hot water supply device 1 includes, for example, an exhaust heat recovery heat exchanger of a fuel cell power generation device that can heat hot water in the hot water storage tank 2 as an external heat source device, and the fuel cell power generation device and the hot water storage hot water supply device 1. A fuel cell cogeneration system is configured by combining with a heating circulation passage for circulating hot water between them, but detailed description of the configuration other than the hot water storage hot water supply device 1 is omitted. Moreover, you may employ | adopt another heat source machine (for example, heat pump type heat source machine) as an external heat source machine.

Next, the exterior case 4 will be described.
As shown in FIG. 1, the exterior case 4 is configured as a box made of thin steel plate by fixing a plate-shaped exterior plate (not shown) to a columnar frame member 5. The auxiliary heat source unit 3 for heating hot water is fixed to the frame member 5, and a specific fixing structure of the auxiliary heat source unit 3 will be described later.

  The frame member 5 that forms a part of the outer case 4 includes four vertical racks 5a extending in the vertical direction, fixed to the lower end portions of the four vertical racks 5a, and a pair of lower end racks 5b extending in the front-rear direction. From a pair of upper racks 5d fixed to the upper part of the vertical rack 5a and extending in the front-rear direction and fixed to the upper ends of the four vertical racks 5a and extending in the left-right direction, etc. It is configured. A fixing bracket 7 for fixing the lower end of the auxiliary heat source device 3 is installed between the pair of middle racks 5c so as to extend in the left-right direction.

Next, the auxiliary heat source unit 3 (corresponding to a heat source unit) will be described.
As shown in FIGS. 1 to 7, the auxiliary heat source unit 3 is fixed to the upper portion of the frame member 5, burns fuel gas, and is stored in the hot water storage tank 2 using sensible heat and latent heat contained in the exhaust. A gas water heater (a so-called latent heat recovery combustion device) that heats hot water or hot water flowing through a heating circulation pipe is configured.

  The auxiliary heat source unit 3 is arranged at the upper part of the burner unit 9 for blowing the combustion air from the outside, the burner unit 9 for mixing and burning the combustion air and the fuel gas taken in by the blower fan 8. The heat exchanger unit 11 that exchanges heat between the combustion heat and hot water by the burner unit 9, and is disposed on the top of the heat exchanger unit 11 and exhausts the heat after the heat exchange by the heat exchanger unit 11 forward Various pipes such as an exhaust collecting cylinder 12, a water inlet pipe 13a, a hot water outlet pipe 13b, and a drain pipe 13c are provided.

  The burner unit 9 includes, for example, a plurality of burners 14 for burning fuel, a box-shaped burner can body 15 containing these burners 14, and the like. A lower fixing member 16 having an L-shape in a side view that can be fixed to the fixing bracket 7 is provided at the lower rear end of the burner can body 15 (see FIG. 5). Further, a blower fan 8 is provided at the lower end of the burner can body 15. The heat exchanger unit 11 includes a sensible heat recovery unit 18 and a latent heat recovery unit 19 disposed above the sensible heat recovery unit 18. An exhaust collecting cylinder 12 is provided at the upper end of the latent heat recovery unit 19.

  The sensible heat recovery unit 18 includes a sensible heat recovery heat exchanger 21 that mainly recovers sensible heat of the exhaust, and a lower heat exchanger can body 22 (corresponding to a case member) that houses the sensible heat recovery heat exchanger 21. ) Etc. The lower heat exchanger can body 22 is configured as a copper box-shaped body. An upper flange portion 22 a is formed at the upper end portion of the lower heat exchanger can body 22, and a lower flange portion 22 b is formed at the lower end portion of the lower heat exchanger can body 22. The lower flange portion 22b of the lower heat exchanger can body 22 and the flange portion 15a formed at the upper end portion of the burner can body 15 are joined by caulking and screw fastening.

  The latent heat recovery unit 19 includes a latent heat recovery heat exchanger 23 that mainly recovers latent heat of exhaust after sensible heat recovery, an upper heat exchanger can body 24 that accommodates the latent heat recovery heat exchanger 23, and the like. The upper heat exchanger can body 24 is configured as a box-shaped body made of a stainless steel sheet. An expansion portion 24 a that protrudes forward and extends in the left-right direction is formed on the front plate portion of the upper heat exchanger can body 24, and a lower flange portion 24 b is formed on the bottom plate portion of the upper heat exchanger can body 24. An exhaust port 23 opened above the latent heat recovery heat exchanger 23 is formed in the top plate portion of the upper heat exchanger can body 24, and a paragraph portion 24c stepped downward is formed.

  The upper flange portion 22a of the lower heat exchanger can body 22 and the lower flange portion 24b of the upper heat exchanger can body 24 are joined by caulking and screw fastening. Further, a front end plate portion 24 d extending downward is provided on the bottom plate portion of the upper heat exchanger can body 24. The front end plate portion 24d is fixed to the upper flange portion 22a of the lower heat exchanger can body 22 through a plurality of screws 24e.

  The exhaust collecting cylinder 12 is configured as a rectangular parallelepiped box-shaped body made of a thin stainless steel plate. The exhaust collecting cylinder 12 is provided with a main body case 27 that forms an exhaust passage 28 for exhaust gas that rises via the latent heat recovery heat exchanger 23, and for exhausting the exhaust that has flowed through the exhaust passage 28 of the main body case 27 to the outside. The exhaust top 29 is mainly configured.

  Inside the main body case 27, a split member 31 for splitting the exhaust gas flowing into the exhaust passage 28 into an exhaust flow toward the front and an exhaust flow toward the rear, and a sound absorbing material holding member 32 for holding the sound absorbing material 33. Etc. are provided. An exhaust introduction port 34 connected to the exhaust port 25 of the latent heat recovery heat exchanger 23 is formed at the bottom of the main body case 27.

  The main body case 27 is configured to protrude forward from the front end of the latent heat recovery unit 19 and to protrude rearward from the rear end of the latent heat recovery unit 19. A base plate 35 that forms a part of the bottom portion is fixed to the bottom portion of the main body case 27 via a plurality of flange portions 27a and a plurality of screws 27b (see FIG. 5). The exhaust collecting cylinder 12 is attached to the upper end portion of the upper heat exchanger can body 24 via a base plate 35.

  The base plate 35 is formed in a rectangular plate shape in plan view. An opening 35 a that communicates with the exhaust port 25 is formed at the center of the base plate 35, and a bent plate portion 35 b that is bent downward is formed at the front end of the base plate 35. A pair of long holes 35c are formed in the bent plate portion 35b adjacent to each other on the left and right. The upper end portion of the reinforcing member 41 is engaged with the pair of long holes 35c. The specific structure of the reinforcing member 41 will be described later.

  An upper fixing member 36 having a crank shape in a side view is provided on the upper front end of the main body case 27. A lower vertical plate portion 36 a of the upper fixing member 36 is fixed to the upper front end of the main body case 27. The upper vertical plate portion 36b of the upper fixing member 36 is formed with a pair of cut and raised pieces 36c that are bent rearward and engageable with a pair of engaging small holes 5e formed in the upper end rack 5d. Yes.

  In the auxiliary heat source unit 3, the incoming water supplied from the inlet pipe 13 a is heated by the latent heat of the exhaust in the latent heat recovery heat exchanger 23, and then supplied to the sensible heat recovery heat exchanger 21. After being heated by the exchanger 21, it is supplied to the hot water discharge pipe 13b. A tray 13d that receives drain (condensed water) generated by the latent heat recovery is provided immediately below the latent heat recovery heat exchanger 23. The drain recovered in the tray 13d passes through the drain pipe 13c and is a neutralizer (not shown). After being neutralized by being sent to (Omitted), it is discharged out of the instrument.

Next, a fixing structure for the frame member 5 of the auxiliary heat source machine 3 will be described.
As shown in FIG. 1 to FIG. 3, the auxiliary heat source unit 3 is disposed at about 1/3 of the upper side inside the outer case 4, and directly fixes the front upper end of the exhaust collecting cylinder 12 to the frame member 5. 9 is fixed to the frame member 5 through a fixing bracket 7.

  That is, the pair of cut and raised pieces 36c of the upper fixing member 36 are engaged with the pair of engagement small holes 5e of the front upper end rack 5d, and the upper vertical plate portion 36b is engaged with the upper end rack 5d via the plurality of screws 36d. Is fixed to the frame member 5, and the lower fixing member 16 is fixed to the fixing bracket 7 via a plurality of screws 16 a, thereby lowering the rear end of the burner portion 9. Is fixed to the frame member 5.

Next, the reinforcing member 41 will be described.
As shown in FIGS. 1 to 3 and FIGS. 5 to 10, the auxiliary heat source unit 3 includes a can body connection portion (a connection portion between the lower heat exchanger can body 22 and the upper heat exchanger can body 24, upper heat exchange. In order to ensure the rigidity of the connecting portion between the exhaust can body 24 and the exhaust collecting cylinder 12, a reinforcing member 41 is provided for connecting the lower end of the front end of the exhaust collecting cylinder 12 and the front end of the heat exchanger section 11. Yes. That is, the reinforcing member 41 connects the lower end portion of the front end of the exhaust collecting cylinder 12 and the upper flange portion 22a of the front end of the lower heat exchanger can body 22 that houses the sensible heat recovery heat exchanger 21. .

  As shown in FIGS. 8 to 10, the reinforcing member 41 is made of a thin plate member made of stainless steel, is integrally formed with a rectangular plate-like main body plate portion 42, and an upper end portion of the main body plate portion 42, and faces rearward. The upper end plate portion 43 is slightly bent, and the lower end plate portion 44 is integrally formed with the lower end portion of the main body plate portion 42 and slightly bent rearward.

  Large portions of the main plate 42 that are close to the center lower side are formed with horizontally long large-diameter holes 42a into which the expansion portions 24a of the upper heat exchanger can 24 can be inserted. A pair of bent portions 42b bent at a right angle toward the front are formed. In the attached state of the reinforcing member 41, the main body plate portion 42 is arranged in an inclined shape that is inclined forward toward the upper end, and the expansion portion 24 a of the upper heat exchanger can body 24 is inserted into the large-diameter long hole 42 a of the main body plate portion 42. Is done.

  A pair of screw mounting pieces 43a extending upward are formed at the left and right ends of the upper portion of the upper end plate portion 43, and between the pair of screw mounting pieces 43a of the upper end plate portion 43, substantially perpendicular to the screw mounting pieces 43a. A pair of engagement pieces 43b bent rearward are formed. Screw holes 43c are respectively formed in the pair of screw mounting pieces 43a. In the attached state of the reinforcing member 41, the pair of engaging pieces 43b are engaged with the pair of long holes 35c of the base plate 35, and the pair of screw attaching pieces 43a are bent plates of the base plate 35 via the screws 43d. Each is fixed to the portion 35b.

  Three downward projecting pieces 44 a extending downward are formed at equal intervals in the left-right direction at the lower portion of the lower end plate portion 44. At the lower end portions of these downward projecting pieces 44a, engagement curved portions 44b each having a U-shape in side view and curved 180 ° toward the rear are formed. In the attached state of the reinforcing member 41, the three engagement curved portions 44b are respectively engaged with the three notched recesses 22c of the upper flange portion 22a of the lower heat exchanger can body 22 from below (FIG. 7). reference).

Next, the operation and effect of the hot water storage and hot water supply apparatus 1 of the present invention will be described.
First, when the reinforcing member 41 is attached to the auxiliary heat source unit 3, the three engaging curved portions 44b on the lower side of the reinforcing member 41 are respectively engaged with the three concave portions 22c of the corresponding upper flange portion 22a from below, The pair of engaging pieces 43 b on the upper side of the reinforcing member 41 are engaged with the pair of long holes 35 c of the base plate 35, respectively.

  Then, the pair of screw mounting pieces 43a of the reinforcing member 41 are fixed to the base plate 35 via a plurality of screws 43d, respectively. In this way, the reinforcing member 41 straddles the upper heat exchanger can body 24 that houses the latent heat recovery heat exchanger 23, and the lower end portion of the front end of the exhaust collecting cylinder 12 and the sensible heat recovery heat exchange. The upper flange portion 22a at the front end of the lower heat exchanger can body 22 that houses the vessel 21 is connected.

  Next, in order to fix the auxiliary heat source unit 3 to which the reinforcing member 41 is attached to the frame member 5, first, the upper fixing member 36 of the exhaust collecting cylinder 12 is set to a pair of cut and raised pieces 36c and a plurality of screws 36d. Is fixed to the upper end rack 5d on the front side of the frame member 5, and the lower side fixing member 16 at the lower rear end of the burner portion 9 is fixed to the fixing bracket 7 via a plurality of screws 16a. 3 is fixed to the frame member 5.

  As described above, the front upper end of the exhaust collecting cylinder 12 and the rear lower end of the burner portion 9 are fixed to the frame member 5 directly or via the fixing bracket 7, and the lower end of the front collecting end 12 Since the reinforcing member 41 that connects the front end of the exchanger unit 11 is provided, the exhaust collecting cylinder 12 and the heat exchanger unit 11 can be stably connected by the reinforcing member 41.

  That is, when the frame member 5 is bent when the front end upper part of the exhaust collecting cylinder 12 and the rear end lower part of the burner part 9 are fixed to the frame member 5, the can body connection between the exhaust collecting cylinder 12 and the heat exchanger part 11 is performed. Since the stress is easily concentrated on the portion, the reinforcing member 41 improves the connection strength between the exhaust collector tube 12 and the can body connecting portion of the heat exchanger portion 11, so that the exhaust collector tube 12 and the heat exchanger portion 11 are connected to each other. The can body is prevented from being damaged (exhaust portion between the lower heat exchanger can body 22 and the upper heat exchanger can body 24, the connection portion between the upper heat exchanger can body 24 and the exhaust collecting cylinder 12) and exhausted. Leakage can be prevented. Since the connection strength of the can connecting portion is improved simply by additionally installing the reinforcing member 41, the rigidity of the auxiliary heat source device 3 can be secured with a simple structure and at a low cost, and the frame member 5 and the auxiliary member can be supplemented. Since there is no need to increase the number of fixing points between the heat source unit 3, the increase in the number of assembly steps of the hot water storage hot water supply device 1 is suppressed and the maintainability of the auxiliary heat source unit 3 is not impaired.

  The heat exchanger section 11 includes a sensible heat recovery heat exchanger 21 and a latent heat recovery heat exchanger 23 disposed on the sensible heat recovery heat exchanger 21. The reinforcing member 41 includes: Since the lower end portion of the front end of the exhaust collecting cylinder 12 is connected to the upper flange portion of the front end of the lower heat exchanger can body 22 (case member) that houses the sensible heat recovery heat exchanger 21, the heat for latent heat recovery By installing the reinforcing member 41 so as to sandwich the exchanger 23, a can connecting portion for connecting the sensible heat recovery heat exchanger 21 and the latent heat recovery heat exchanger 23 and the latent heat recovery heat exchanger 23, The can connecting portion for connecting the exhaust collecting cylinder 12 is strengthened.

An example in which the embodiment is partially changed will be described.
[1] In the lower fixing structure of the auxiliary heat source device 3 of the above embodiment, the lower fixing member 16 of the burner portion 9 is indirectly fixed to the frame member 5 by fixing it to the fixing bracket 7. It is not necessary to limit to this fixing structure, The shape of the lower side fixing member 16 may be changed as appropriate, and the lower end portion of the auxiliary heat source device 3 may be directly fixed to the frame member 5.

  Further, in the upper fixing structure of the auxiliary heat source unit 3 of the above embodiment, the upper fixing member 36 of the exhaust collecting cylinder 12 is directly fixed to the frame member 5. The member 36 may be indirectly fixed to the frame member 5 via a fixing bracket.

[2] The structure of the reinforcing member 41 of the above-described embodiment is merely an example, as long as the lower end portion of the front end of the exhaust collecting cylinder 12 and the front end portion of the heat exchanger portion 11 can be connected. These can be changed as appropriate.

[3] In addition, those skilled in the art can implement the present invention in various forms with various modifications without departing from the spirit of the present invention, and the present invention includes such modifications. It is.

DESCRIPTION OF SYMBOLS 1 Hot water storage hot-water supply apparatus 3 Auxiliary heat source machine 4 Exterior case 5 Frame member 7 Fixing bracket 9 Burner part 11 Heat exchanger part 12 Exhaust tube 21 Sensible heat recovery heat exchanger 22 Lower heat exchange can body 22a Upper flange part 23 Latent heat Recovery heat exchanger 24 Upper heat exchange can 24b Lower flange 41 Reinforcing member

Claims (2)

A hot water storage and hot water supply apparatus having a frame member that forms a part of an exterior case, wherein a heat source device for heating hot water is fixed to the frame member,
The heat source unit includes a burner unit that burns fuel, a heat exchanger unit that is disposed above the burner unit and exchanges heat between combustion heat generated by the burner unit and hot water, and an upper part of the heat exchanger unit. And an exhaust collecting cylinder for discharging the exhaust after heat exchange by the heat exchanger section forward,
A front end upper portion of the exhaust gas collection tube and a rear end lower portion of the burner portion are fixed to the frame member directly or via a fixing bracket, and a lower end portion of the front end of the exhaust gas collection tube and a front end portion of the heat exchanger portion A hot water storage and hot water supply device comprising a reinforcing member for connecting the two. The heat exchanger section includes a sensible heat recovery heat exchanger, and a latent heat recovery heat exchanger disposed on an upper portion of the sensible heat recovery heat exchanger,
The said reinforcing member connects the lower end part of the front end of the said exhaust gas collection cylinder, and the upper flange part of the front end of the case member which accommodates the said sensible heat recovery heat exchanger. Hot water storage water heater.