JP2018004217A - Horizontally installed type water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a horizontally installed type water heater with a high degree of installation freedom.SOLUTION: In a housing of a shape having a bottom surface and a top surface, a combustion vessel and a heat exchanger and an exhaust cover are stored in a horizontally connected state, and at the bottom surface and the top surface, a plurality of leg parts for supporting a horizontally installed type water heater are provided in a protrusive manner. Then, the height of the plurality of leg parts is set to be the height for supporting the horizontally installed type water heater in a tilted state so that dew condensation water in combustion exhaust generated in the heat exchanger flows toward the exhaust cover, when the horizontally installed water heater is installed with the bottom surface or the top surface facing downward. Thus, the horizontally installed type water heater can be installed either in a state of the bottom surface or the top surface facing downward. In addition, even in either case of installation, the dew condensation water in the combustion exhaust generated in the heat exchanger flows toward the exhaust cover, there is no risk of the heat exchanger being damaged. As a result, the degree of installation freedom of the horizontally installed water heater can be improved without the need of worrying about whether the bottom surface or the top surface should face downward.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a horizontal water heater that is housed in a housing in a state where a combustion container housing a burner, a heat exchanger, and an exhaust cover provided with an exhaust port are connected in a horizontal direction.

  2. Description of the Related Art Hot water heaters that generate hot water by burning fuel gas with a burner to generate high-temperature combustion exhaust and heat-exchanging the combustion exhaust and water with a heat exchanger are widely used. In this water heater, generally, a heat exchanger is disposed above a combustion container that houses a burner, and an exhaust port is formed above the heat exchanger. The combustion exhaust generated by the burner is generally upward. It flows out from the exhaust port by flowing toward.

  Also, in response to requests for installation space, etc., the combustion vessel is laid sideways along with the burner, a heat exchanger is placed on the side of the combustion vessel, an exhaust port is provided on the side of the heat exchanger, A water heater (hereinafter referred to as a horizontal water heater) is also proposed (Patent Document 1). Note that a water heater in which a heat exchanger is disposed above the combustion container and the combustion exhaust gas flows upward (or downward in some cases) with respect to the horizontal water heater will be referred to as a vertical water heater.

JP 2003-185126 A

  However, the horizontal water heater has a problem that the degree of freedom of installation is lower than that of the vertical water heater. That is, in the vertical water heater, the combustion exhaust is discharged upward, so that, for example, even when a discharge hole for discharging the combustion exhaust to the outside is provided in the wall on the right side of the water heater, Even when it is provided on the left wall surface, it can be easily handled by the piping of the exhaust passage. On the other hand, since the horizontal type water heater discharges combustion exhaust from the side surface, a discharge hole for discharging the combustion exhaust to the outside is provided on the wall surface opposite to the side where the combustion exhaust is discharged. If so, the piping of the exhaust passage becomes a large scale. For this reason, there has been a problem that the space for piping cannot be secured and the water heater cannot be installed, or the installation of the water heater becomes difficult.

  This invention was made | formed corresponding to the subject mentioned above which a prior art has, and it aims at providing the horizontal installation type water heater with a high installation freedom degree.

In order to solve the above-described problems, the water heater of the present invention employs the following configuration. That is,
A combustion vessel containing a burner for burning fuel gas, a heat exchanger connected to the combustion vessel to generate hot water by passing through combustion exhaust generated by the burner, and the heat exchanger passed A horizontal water heater that is housed in a housing in a state in which the combustion container, the heat exchanger, and the exhaust cover are connected in a horizontal direction. In
The housing has a shape having a bottom surface and a top surface,
Each of the bottom surface and the top surface of the housing has a plurality of legs protruding to support the horizontal water heater when the horizontal water heater is installed with the bottom surface or the top surface facing down. ,
When the horizontal water heater is installed with the bottom surface or the top surface facing down, the dew condensation water in the combustion exhaust generated in the heat exchanger is formed in the exhaust cover. The horizontal water heater is set to a height that supports it in a tilted state so that it flows toward the front.

  In the horizontal water heater of the present invention, the combustion container, the heat exchanger, and the exhaust cover are stored in a horizontally connected state in a housing having a bottom surface and a top surface. A plurality of legs that support the horizontal water heater are provided on each top surface. When the horizontal water heater is installed with the bottom or top facing down, the heat exchanger is lower than the combustion vessel and the exhaust cover is higher than the heat exchanger. Is set to a height that supports the horizontal water heater in an inclined state so that the dew condensation water in the combustion exhaust generated in the heat exchanger flows toward the exhaust cover.

  In this way, since the legs are provided on both the bottom surface and the top surface, it is possible to install the horizontal water heater not only in the aspect in which the bottom surface is directed downward but also in the aspect in which the top surface is directed downward. it can. In addition, regardless of whether the horizontal water heater is installed with the bottom side facing down or the top side facing down, the dew condensation water in the combustion exhaust generated in the heat exchanger is directed toward the exhaust cover. The horizontal water heater is installed in a tilted state so that it can flow. For this reason, there is no possibility that the condensed water stays in the heat exchanger and the heat exchanger is damaged. As a result, there is no need to worry about whether the bottom surface or the top surface is down, so that it is possible to improve the degree of freedom in installing the horizontal water heater.

  In the horizontal water heater of the present invention described above, the shape of the housing may be a box shape having at least one pair of side surfaces facing each other in addition to the bottom surface and the top surface. An exhaust passage port through which combustion exhaust discharged outside the housing passes is opened on one side of the set, and a fuel gas passage port through which the fuel gas passes and a heat You may open the water passage port through which the water supplied to an exchanger passes, and the hot water passage port through which the hot water produced | generated with the heat exchanger passes.

  In the housing, the combustion container, the heat exchanger, and the exhaust cover are accommodated in a horizontally connected state. Therefore, an exhaust passage opening is opened on one of the pair of side surfaces facing each other, and the other side surface is opened. If the fuel gas passage port, the water passage port, and the hot water passage port are opened, exhaust and fuel gas, water, and hot water piping inside the horizontal water heater can be facilitated. In addition, a horizontal water heater can be installed with either the bottom surface or the top surface facing downward, so that either the bottom surface or the top surface faces down according to the situation of the installation location of the horizontal water heater. By setting it facing, exhaust and fuel gas, water and hot water piping outside the horizontal water heater can be facilitated.

  In the horizontal water heater of the present invention described above, the inner peripheral surface of the heat exchanger and the inner peripheral surface of the exhaust cover have the following positional relationship at the connection portion between the heat exchanger and the exhaust cover. In this way, the heat exchanger and the exhaust cover may be connected. In other words, when the horizontal water heater is installed, the heat exchanger and the exhaust are in a state where the inner peripheral bottom surface of the exhaust cover into which the condensed water flows is lower than the inner peripheral bottom surface of the heat exchanger through which the condensed water flows. The cover may be connected.

  In this way, due to the assembly error between the heat exchanger and the exhaust cover, the inner peripheral bottom surface of the exhaust cover becomes higher than the inner peripheral bottom surface of the heat exchanger, and condensation from the heat exchanger to the exhaust cover occurs. The situation where water stops flowing can be avoided. In addition, since the inner peripheral bottom surface of the exhaust cover is lower than the inner peripheral bottom surface of the heat exchanger, more condensed water can be stored on the exhaust cover side accordingly. For this reason, even if a large amount of condensed water is generated, it is possible to treat the condensed water without overflowing the heat exchanger.

Moreover, the water heater of this invention mentioned above can also be grasped | ascertained in the following aspects. That is,
A combustion vessel containing a burner for burning fuel gas, a heat exchanger connected to the combustion vessel to generate hot water by passing through combustion exhaust generated by the burner, and the heat exchanger passed A horizontal water heater that is housed in a housing in a state in which the combustion container, the heat exchanger, and the exhaust cover are connected in a horizontal direction. In
On the bottom surface of the housing, a plurality of legs that support the horizontal water heater when the horizontal water heater is installed project.
When the horizontal water heater is installed with the bottom surface or the top surface facing down, the dew condensation water in the combustion exhaust generated in the heat exchanger is formed in the exhaust cover. The horizontal water heater is set to a height that supports it in a tilted state so that it flows toward the front.

  In the horizontal water heater of the present invention ascertained in such a manner, the combustion container, the heat exchanger, and the exhaust cover are accommodated in the housing in a horizontally connected state, Is provided with a plurality of projecting legs that support the horizontal water heater. And when the horizontal water heater is installed, the height of the plurality of legs is lower in the heat exchanger than in the combustion container and lower in the exhaust cover than the heat exchanger, It is set to a height that supports the horizontal hot water heater in an inclined state so that the condensed water in the combustion exhaust generated inside flows toward the exhaust cover. For this reason, even if condensation occurs in the heat exchanger, the condensed water flows from the heat exchanger toward the exhaust cover, so there is no possibility that the condensed water remains in the heat exchanger and the heat exchanger is damaged. .

It is explanatory drawing which shows the structure of the horizontal installation type water heater 1 of a present Example. It is a perspective view which shows the leg parts 13a and 13b protrudingly provided by the top | upper surface 10a of the horizontal type water heater 1 of a present Example, and the leg parts 14a and 14b protrudingly provided by the bottom face 10b. It is explanatory drawing which shows the installation state of the horizontal type water heater 1 of a present Example. 4 is an enlarged cross-sectional view of a shape of a connection portion between a heat exchanger 50 and an exhaust cover 60. FIG. It is explanatory drawing about the horizontal installation type water heater 2 of a modification.

  FIG. 1 is an explanatory diagram showing a rough structure of a horizontal water heater 1 according to this embodiment. FIG. 1A shows the appearance of the horizontal water heater 1 according to this embodiment. As shown in the figure, the horizontal water heater 1 according to the present embodiment includes a box-shaped housing 10 having one side opened, and a front cover 11 attached in a state where the opening of the housing 10 is closed. It has a roughly rectangular parallelepiped shape. The housing 10 is provided with a top surface 10a, a bottom surface 10b (not shown) provided at a position facing the top surface 10a, and three side surfaces. A set of side surfaces among these three side surfaces are provided at positions facing each other, and an exhaust port 60e described later projects through the side surface 10c on one side surface 10c facing each other. Further, on the other side surface 10d (not shown in FIG. 1) facing the side surface 10c, a water supply pipe 20i, a hot water supply pipe 20o, and a fuel gas pipe 20g, which will be described later, protrude through the side surface 10d. .

  FIG. 1B shows a rough internal structure of the horizontal water heater 1 housed in the housing 10. As shown in the figure, a combustion fan 30, a combustion container 40, a heat exchanger 50, and an exhaust cover 60 are housed in the housing 10 connected in the horizontal direction in this order. Of these, the combustion container 40 incorporates a burner (not shown), and generates high-temperature combustion exhaust gas by burning fuel gas with the burner. The fuel gas burned by the burner is supplied to the combustion container 40 from the outside of the housing 10 through the fuel gas pipe 20g. In addition, combustion air necessary for combustion is supplied from the combustion fan 30 to the combustion container 40. The combustion exhaust generated by the combustion of the fuel gas and the combustion air in the combustion container 40 flows into the heat exchanger 50 from the combustion container 40.

  Inside the heat exchanger 50, a copper water pipe (not shown) is stored in a meandering manner, and a plurality of copper fins are attached to the water pipe. Furthermore, the case of the heat exchanger 50 that houses the water pipes and fins is also formed of a copper plate. And the water supply piping 20i is connected to the one end side of a water flow pipe, and the hot water piping 20o is connected to the other end side of a water flow tube. When fuel gas and combustion air are burned in the combustion container 40 while supplying water from the water supply pipe 20i, the high-temperature combustion exhaust gas generated in the combustion container 40 flows into the heat exchanger 50, and the inside of the water flow pipe is Heat the flowing water. As a result, the water heated by the combustion exhaust gas becomes hot water and flows out from the hot water discharge pipe 20o. Further, the combustion exhaust cooled by warming the water in the water flow pipe flows into the exhaust cover 60 from the heat exchanger 50 and is discharged to the outside through an exhaust port 60e formed in the exhaust cover 60. Moreover, as shown in FIG.1 (c), if the front cover 11 is removed from the housing 10, it will become possible to maintain the various components incorporated in the horizontal water heater 1.

  FIG. 2 is an explanatory diagram showing the detailed shapes of the top surface 10a, the bottom surface 10b, and the two opposing side surfaces 10c and 10d of the horizontal water heater 1 of the present embodiment. FIG. 2A shows a standard installation state of the horizontal water heater 1 with the top surface 10a of the housing 10 facing upward. In a standard installation state, the exhaust port 60e protrudes from the right side of the horizontal water heater 1 when viewed from the front cover 11 side. Corresponding to this, a large circular exhaust passage port 12e is opened on the right side surface 10c when viewed from the front cover 11, and an exhaust port 60e projects from the exhaust passage port 12e.

  Further, four leg portions 13a and 13b are projected from the four corners of the top surface 10a. Of these, two legs 13b projecting on the right side (the side from which the exhaust port 60e projects) as viewed from the front cover 11 side, and two legs 13a projecting on the left side. The amount of protrusion from the top surface 10a is different, and the left leg 13a has a larger protrusion than the right leg 13b.

  FIG. 2B shows an installed state of the horizontal water heater 1 with the top surface 10a of the housing 10 facing downward and the bottom surface 10b facing upward. In the installation state in which the upper and lower sides are reversed, the water supply pipe 20i, the hot water supply pipe 20o, and the fuel gas pipe 20g are connected from the right side of the horizontal water heater 1 when viewed from the front cover 11 side. Correspondingly, in the installation state in which the top and bottom are reversed, the water passage port 12i through which the water supply pipe 20i penetrates and the hot water through which the tap water pipe 20o penetrates the side surface 10d which is the right side when viewed from the front cover 11 side. The passage opening 12o and the fuel gas passage opening 12g through which the fuel gas pipe 20g passes are opened. In the following description, the water supply pipe 20i, the hot water pipe 20o, and the fuel gas pipe 20g are collectively referred to as various pipes 20i, 20o, and 20g.

  Also, four leg portions 14a and 14b are projected from the four corners of the bottom surface 10b. Of these, two leg portions 14a projecting on the right side (the side to which the various pipes 20i, 20o, 20g are connected) when viewed from the front cover 11 side in the upside down state. The protruding amount from the bottom surface 10b is different from the two leg portions 14b projecting on the right side, and the protruding amount of the right leg portion 14a is larger than that of the left leg portion 14b.

  As described above, the horizontal water heater 1 according to the present embodiment has not only the leg portions 14a and 14b protruding from the four corners of the bottom surface 10b, but also the leg portions 13a and 13b protruding from the four corners of the top surface 10a. Has been. For this reason, in addition to the standard installation state shown in FIG. 2 (a), it can be installed in a state where the top and bottom are reversed as shown in FIG. 2 (b). As a result, the maintenance side (the side on which the front cover 11 is provided) is left as it is, and the side where the various pipes 20i, 20o, 20g are connected and the side where the exhaust port 60e projects are reversed. It becomes possible to install in. That is, in the standard installation state shown in FIG. 2A, when viewed from the front cover 11 side (maintenance side), various pipes 20i, 20o, 20g are connected on the left side, and the exhaust port 60e protrudes on the right side. ing. On the other hand, as shown in FIG. 2B, in the installation state in which the top and bottom are reversed, various pipes 20i, 20o, and 20g are connected on the right side, and the exhaust port 60e protrudes on the left side. it can. For this reason, according to the situation where the horizontal water heater 1 is installed, the standard installation state shown in FIG. 2 (a) and the installation state in which the top and bottom shown in FIG. 2 (b) are reversed are selected. Therefore, the degree of freedom of installation can be greatly improved without impairing the maintainability of the horizontal water heater 1 at all.

  In addition, the four leg portions 13a and 13b projecting from the top surface 10a are leg portions on the side from which the exhaust port 60e protrudes toward the leg portion 13a on the side where the various pipes 20i, 20o and 20g are connected. The amount of protrusion from the top surface 10a is set larger than 13b (see FIG. 2A). Similarly, for the four leg portions 14a and 14b projecting from the bottom surface 10b, the leg portion 14b on the side where the various pipes 20i, 20o, and 20g are connected to the leg portion 14b on the side from which the exhaust port 60e projects. The protrusion amount from the bottom surface 10b is set larger than that (see FIG. 2B). For this reason, the horizontal water heater 1 is low on the side from which the exhaust port 60e protrudes in both the standard installation state shown in FIG. 2A and the installation state shown in FIG. It will be installed in a tilted state. By doing so, it is possible to improve the durability of the horizontal water heater 1.

  FIG. 3 illustrates the reason why the durability of the horizontal water heater 1 can be improved by installing the horizontal water heater 1 in an inclined state so that the side from which the exhaust port 60e protrudes is lowered. FIG. FIG. 3A shows an internal state of the horizontal water heater 1 when the horizontal water heater 1 is installed in a standard state. As described above with reference to FIG. 1B, the combustion fan 30, the combustion container 40, the heat exchanger 50, and the exhaust cover 60 are horizontally connected in this order inside the horizontal water heater 1. Has been stored. The combustion exhaust generated in the combustion container 40 is cooled by the heat exchanger 50 and discharged to the outside from the exhaust port 60e of the exhaust cover 60.

  Here, the combustion exhaust gas contains water vapor generated by the combustion of the fuel gas. Therefore, when the combustion exhaust gas is cooled when passing through the heat exchanger 50, the water vapor in the combustion exhaust gas is condensed inside the heat exchanger 50 to generate dew condensation water. The combustion exhaust gas also contains nitrogen oxides (although a small amount) generated by the oxidation of nitrogen in the air during combustion. Furthermore, when the sulfur component is contained in fuel gas, the sulfur component which the sulfur component oxidized by combustion may be contained. And when these nitrogen oxides and sulfur oxides melt | dissolve, the dew condensation water produced in the heat exchanger 50 turns into the liquid called drain which exhibits weak acidity.

  Further, as described above, in the heat exchanger 50, the water pipe provided therein, the fins attached to the water pipe, and the case for housing the water pipe and the fins are made of copper. For this reason, if the drain remains in the heat exchanger 50, there is a possibility that a hole is formed in the heat exchanger 50. In the horizontal water heater 1, the combustion container 40, the heat exchanger 50, and the exhaust cover 60 are connected in the horizontal direction, and the heat exchanger 50 is in a sideways state. Therefore, the drain generated in the step is likely to stay on the lower surface side in the heat exchanger 50.

  Therefore, in the horizontal water heater 1 of the present embodiment, as shown in FIG. 3A, when the horizontal water heater 1 is installed, it is installed in a tilted state so that the side from which the exhaust port 60e protrudes is lowered. To be. In this way, even if the drain generated in the heat exchanger 50 drops downward in the heat exchanger 50 and reaches the lower surface of the heat exchanger 50, the lower surface is inclined toward the exhaust cover 60 side. Therefore, the drain can be discharged toward the exhaust cover 60. For this reason, since the drain does not remain in the heat exchanger 50, a hole is not opened in the heat exchanger 50.

  Also, from the viewpoint that the drain does not stay in the heat exchanger 50, it is effective to reverse the direction in which the horizontal water heater 1 is tilted and raise the side from which the exhaust port 60e protrudes. Then, the drain generated in the heat exchanger 50 flows into the combustion container 40. However, a plurality of precision parts such as a burner, a spark plug, and a flame sensor are mounted in the combustion container 40, and if these are affected by drainage, there is a possibility that a problem of the horizontal water heater 1 occurs. is there. On the other hand, the exhaust cover 60 has a simple structure, and is formed of a stainless steel sheet from the viewpoint of heat resistance. Since stainless steel is also excellent in acid corrosion resistance, even if drain flows in. There is no risk of failure.

  And in the horizontal type water heater 1 of a present Example, the horizontal type water heater 1 can be inclined by making the protrusion amount from the bottom face 10b differ in the leg part 14a and the leg part 14b which were provided in the bottom face 10b. Therefore, it is possible to install the horizontal water heater 1 with the correct inclination that the side from which the exhaust port 60e protrudes is lowered simply by installing the horizontal water heater 1.

  Although the case where the horizontal type water heater 1 is installed in a standard state (that is, the state where the bottom surface 10b is directed downward) has been described above, the horizontal type water heater 1 is turned upside down (that is, the ceiling The same description applies to the case of installation with the surface 10a facing downward. FIG. 3B shows an internal state of the horizontal water heater 1 when installed in a state where the top and bottom are reversed. As for the leg portions 13a and 13b projecting from the top surface 10a, the protruding portion from the top surface 10a is larger in the opposite leg portion 13a than in the leg portion 13b on the exhaust port 60e side. When the water heater 1 is installed, it is installed in an inclined state so that the side from which the exhaust port 60e protrudes becomes lower. For this reason, since the drain which generate | occur | produced in the heat exchanger 50 can be discharged | emitted toward the exhaust cover 60, a hole does not open in the heat exchanger 50 with the drain collected in the heat exchanger 50. FIG.

  In addition, even when installing in a state where the top and bottom are reversed (that is, with the top surface 10a facing downward), the leg portion 13a and the leg portion 13b projecting from the top surface 10a are separated from the top surface 10a. Since the horizontal type water heater 1 is inclined by making the amount of protrusion different, the horizontal type water heater 1 with the correct inclination that the side from which the exhaust port 60e protrudes is lowered simply by installing the horizontal type water heater 1. Can be installed.

  Further, in the horizontal water heater 1 of the present embodiment, the drain generated in the heat exchanger 50 flows into the exhaust cover 60. Therefore, it is desirable that the connection portion between the heat exchanger 50 and the exhaust cover 60 has a shape that does not hinder the inflow of drain. FIG. 4A shows an enlarged cross-sectional view of a connection portion (portions indicated as A and B in FIG. 3) between the heat exchanger 50 and the exhaust cover 60. As shown in the drawing, the heat exchanger 50 and the exhaust cover 60 are connected by a bolt (not shown) with the flange 51 and the exhaust cover 60 sandwiched between the heat exchanger 50 and the packing 52. The inner peripheral bottom surface 50u of the heat exchanger 50 through which the drain flows and the inner peripheral bottom surface 60u of the exhaust cover 60 through which the drain flows are substantially flush with each other, and the packing 52 is attached without protruding. . For this reason, the drain generated in the heat exchanger 50 can flow into the exhaust cover 60 without being disturbed. Further, the drain that has flowed into the exhaust cover 60 accumulates at the lower end portion of the exhaust cover 60. However, as described above, the exhaust cover 60 is formed of a material excellent in acid corrosion resistance, so that there is a problem that a hole is opened due to corrosion. Will not occur. And it becomes possible to process by evaporating drain as time passes.

  As shown in FIG. 4B, the interval between the inner peripheral surfaces facing the exhaust cover 60 is made wider (at least in the vertical direction) than the interval between the inner peripheral surfaces facing the heat exchanger 50. When the exhaust cover 60 is assembled to the heat exchanger 50, the inner peripheral bottom surface 60u of the exhaust cover 60 may be one step lower than the inner peripheral bottom surface 50u of the heat exchanger 50. By doing so, the inner peripheral bottom surface 60u of the exhaust cover 60 becomes higher than the inner peripheral bottom surface 50u of the heat exchanger 50 due to the variation during assembly, and drainage is generated from the heat exchanger 50 to the exhaust cover 60. The situation where it does not flow can be avoided. In addition, since the amount of drain that can be stored in the exhaust cover 60 also increases, even when a large amount of drain is generated, it is possible to perform processing on the exhaust cover 60 side.

  In addition, as illustrated in FIG. 4C, a drain pool 60 d may be provided on the inner peripheral bottom surface 60 u of the exhaust cover 60. As shown in FIG. 3, the horizontal water heater 1 is also installed in an upside down manner. Therefore, the drain reservoir 60 d is also formed on the surface of the exhaust cover 60 that faces the inner peripheral bottom surface 60 u. By doing so, since the drain can also be stored in the drain reservoir 60d, even when a large amount of drain is generated, it becomes possible to reliably process the drain on the exhaust cover 60 side.

  In the horizontal water heater 1 of the present embodiment described above, the leg portions 13a and 13b and the leg portions 14a and 14b are provided on the top surface 10a and the bottom surface 10b, respectively, but the leg portion 13a is provided on the top surface 10a. It is also possible to provide the leg portions 14a, 14b on the bottom surface 10b without providing them. FIG. 5 illustrates a horizontal water heater 2 of such a modification. Fig.5 (a) is a perspective view which shows the external appearance shape of the horizontal type water heater 2 of a modification, and FIG.5 (b) is explanatory drawing which shows the state which installed the horizontal type water heater 2 of a modification. . As shown in FIG. 5B, even in such a modified example, when the horizontal water heater 2 is installed, the exhaust cover 60 is naturally lower than the heat exchanger 50. For this reason, even if the combustion exhaust gas is condensed in the heat exchanger 50 and condensed water called drain is generated, the drain flows from the heat exchanger 50 to the exhaust cover 60, so that the heat exchanger 50 is damaged. Can be avoided.

  The horizontal water heater 1 of the present embodiment has been described above, but the present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the scope of the present invention.

1, 2 ... Horizontal water heater, 10 ... Housing, 10a ... Top surface,
10b ... bottom, 10c, d ... side, 11 ... front cover,
12e ... exhaust passage port, 12g ... fuel gas passage port, 12i ... water passage port,
12o ... Hot water passage opening, 13a, b ... Leg, 14a, b ... Leg,
20g ... fuel gas piping, 20i ... water supply piping, 20o ... tapping piping,
30 ... Combustion fan, 40 ... Combustion vessel, 50 ... Heat exchanger,
50u ... inner peripheral bottom surface, 51 ... flange, 52 ... packing,
60 ... Exhaust cover, 60d ... Drain pool, 60e ... Exhaust port,
60u ... inner peripheral bottom surface.

Also, four leg portions 14a and 14b are projected from the four corners of the bottom surface 10b. Of these, two leg portions 14a projecting on the right side (the side to which the various pipes 20i, 20o, 20g are connected) when viewed from the front cover 11 side in the upside down state. , the two legs 14b which is projected to the left side, have different projection amount from the bottom surface 10b, the amount of protrusion is larger than the leg portion 14b towards the left of the right leg portion 14a .

As described above, the horizontal water heater 1 of the present embodiment has not only the leg portions 14a and 14b protruding from the four corners of the bottom surface 10b, but also the leg portions 13a and 13b protruding from the four corners of the top surface 10a. Has been. For this reason, in addition to the standard installation state shown in FIG. 2 (a), it can be installed in a state where the top and bottom are reversed as shown in FIG. 2 (b). As a result, maintenance sides (front side cover 11 is provided) is intact, various pipes 20i, 20o, 20 g and the side which is connected, two types of reversed the side where the exhaust port 60e is projected It becomes possible to install in an aspect. That is, in the standard installation state shown in FIG. 2A, when viewed from the front cover 11 side (maintenance side), the various pipes 20i, 20o, and 20g are connected to the left side, and the exhaust port 60e protrudes to the right side. ing. On the other hand, as shown in FIG. 2B, in the installation state in which the top and bottom are reversed, various pipes 20i, 20o, and 20g are connected on the right side, and the exhaust port 60e protrudes on the left side. it can. For this reason, according to the situation where the horizontal water heater 1 is installed, the standard installation state shown in FIG. 2 (a) and the installation state in which the top and bottom shown in FIG. 2 (b) are reversed are selected. Therefore, the degree of freedom of installation can be greatly improved without impairing the maintainability of the horizontal water heater 1 at all.

Claims (3)

A combustion vessel containing a burner for burning fuel gas, a heat exchanger connected to the combustion vessel to generate hot water by passing through combustion exhaust generated by the burner, and the heat exchanger passed A horizontal water heater that is housed in a housing in a state in which the combustion container, the heat exchanger, and the exhaust cover are connected in a horizontal direction. In
The housing has a shape having a bottom surface and a top surface,
On the bottom surface and the top surface of the housing, when the horizontal water heater is installed with the bottom surface or the top surface facing down, a plurality of legs are provided to support the horizontal water heater,
When the horizontal water heater is installed with the bottom surface or the top surface facing down, the dew condensation water in the combustion exhaust generated in the heat exchanger is formed in the exhaust cover. The horizontal water heater is set to a height that supports the horizontal water heater in an inclined state so as to flow toward the water. The horizontal water heater according to claim 1,
The housing has a box shape having at least one pair of mutually facing side surfaces in addition to the bottom surface and the top surface,
An exhaust passage opening through which the combustion exhaust discharged to the outside of the housing passes is opened on one of the pair of side surfaces,
The other side of the set of side surfaces includes a fuel gas passage port through which the fuel gas supplied to the burner passes, a water passage port through which water supplied to the heat exchanger passes, and the heat exchanger. A horizontal water heater characterized by having a hot water passage opening through which the generated hot water passes. The horizontal water heater according to claim 1 or 2,
In the heat exchanger and the exhaust cover, when attention is paid to a connection portion between the heat exchanger and the exhaust cover, the inside of the heat exchanger in which the condensed water flows when the horizontal water heater is installed. The horizontal hot water heater is connected such that the inner peripheral bottom surface of the exhaust cover into which the condensed water flows is lower than the peripheral bottom surface.

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