Electric water heater

Abstract

To provide an electric water heater capable of appropriately selecting installation modes according to a situation of an installation place, and suppressing manufacturing costs and construction costs.SOLUTION: A storage type electric water heater 1 has a casing 24, and fixing members 26, 28 commonly used in both of a case when the casing is fixed to a wall surface W and a case when it is fixed to a floor surface F, and fixable to the wall and the floor. The casing includes fixing portions for wall 46a, 46b capable of being fixed to the wall through fixing members in a case when a rear wall 36 is fixed to the wall, the fixing portions for wall are engageable with the fixing members in a state of being fixed to the wall, the casing includes fixing portions for floor 60a, 60b, 62a, 62b capable of being fixed to the floor through the fixing members when a bottom wall 38 is fixed to the floor, and the fixing portions for floor are engageable with the fixing members in a state of being fixed to the floor.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an electric water heater, and more particularly to a storage-type electric water heater that is capable of supplying stored hot water. [Background technology]

[0002] Conventionally, as a storage-type electric water heater that can supply stored hot water, for example, as described in Patent Document 1, there have been known those that are attached to a vertical wall below a wall-mounted or counter-type washbasin. Such a conventional storage type electric water heater is designed to be installed on a vertical wall in a limited space below a washbasin. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-164077 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-mentioned conventional storage-type electric water heater cannot be installed on the floor, so depending on the site where there is almost no space to install it, such as under the washbasin, it may be necessary to install a new wall for wall-hanging in another space, etc. This causes a problem of a large construction burden.

[0005] Therefore, the present invention has been made to solve the problems of the conventional technology described above, and aims to provide a storage-type electric water heater that allows an appropriate installation form to be selected depending on the conditions of the installation location, and that can reduce product costs and construction costs. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the present invention provides a storage-type electric hot water heater capable of supplying stored hot water, the storage-type electric hot water heater comprising: a water passage through which water supplied from a water supply source flows; a tank for storing water supplied from the water passage; an electric heating unit for electrically heating the water in the tank; a water supply system functional unit for opening and closing the water passage or the tank; a casing provided to cover the water passage, the tank, the electric heating unit, and the water supply system functional unit from the outside; and a fixing member which can be used both when the casing is fixed to a wall and when the casing is fixed to a floor and which can be fixed to either of these walls and the floor, the casing comprising a front wall and a rear wall provided in the front-rear direction, respectively, a bottom wall and a top wall provided in the up-down direction, respectively, and side walls provided on both sides in the left-right direction, the casing comprising a wall fixing part which can be fixed to the wall via the fixing part when the rear wall is fixed to the wall, and the wall fixing part Against The fixing member Mounting The casing is provided with a floor fixing part that can be fixed to the floor via the fixing member when the bottom wall of the casing is fixed to the floor, and the floor fixing part Against The fixing member Mounting It is characterized by being possible. In the present invention configured in this manner, by using a fixing member that can be used both when the casing is fixed to a wall and when it is fixed to a floor, the casing can be fixed to a wall or floor via a common fixing member. Therefore, the same fixing members can be used regardless of whether the casing is fixed to a wall or to a floor, thereby reducing product costs and installation costs. In addition, depending on the installation location of the electric water heater, an installation form in which the casing is fixed to a wall or to the floor can be selected as appropriate, thereby improving the ease of installation of the electric water heater.

[0007] In the present invention, preferably, the fixing member is a first fixing member capable of fixing the casing to a first fixing position on the wall; On the wall or floor The 2 fixed positions Place The above casing can be fixed The first2 Fixing member and, Each of them has The wall fixing portion includes a first wall fixing portion provided on the rear wall of the casing so as to be fixable to the first fixing position of the wall via the first fixing member when the rear wall of the casing is fixed to the wall, and a second wall fixing portion so as to be fixable to the second fixing position of the wall via the second fixing member, and the second fixing member and the second wall fixing portion restrict disengagement between them in a state in which the first wall fixing portion is engaged with the first fixing member in a state in which the first fixing member is fixed to the wall. Yes do. In the present invention configured as described above, when the first fixing part is engaged with the first fixing member fixed to the wall, the second fixing member and the second fixing part are fixed together. This reliably restricts the disengagement of the first fixing member and the first fixing part. This allows the electric water heater to be stably fixed to the wall.

[0008] In the present invention, preferably, the floor fixing part is fixable to the second fixing position of the floor via the second fixing member; The second wall fixing portion is provided on the rear wall of the casing, Recording floor The fixing portion is provided on the bottom wall of the casing. In the present invention configured as described above, since the second wall fixing part is provided on the rear wall of the casing, when the rear wall of the casing is fixed to the wall, the second wall fixing part and the second fixing member can be concealed between the casing and the wall. As a result, in the installed state of the electric water heater, the second wall fixing part and the second fixing member are not exposed, and the appearance is not impaired. Similarly ,floor The fixing part is provided on the bottom wall of the casing, so when the bottom wall of the casing is fixed to the floor, On the floor The fixing portion and the second fixing member can be concealed between the casing and the floor. ,floor The fixing portion and the second fixing member are not exposed, and the appearance is not impaired.

[0011] In the present invention, the first wall fixing portion is preferably located above the center of gravity of the electric water heater when the tank is full of water. In the present invention configured as described above, when the casing is fixed to a wall, the first wall fixing part of the casing is located above the center of gravity of the electric water heater when the tank is full of water. This makes it possible to suppress the force that tilts the casing in a direction away from the wall compared to when the first wall fixing part of the casing is located at the same height as or lower than the center of gravity of the electric water heater when the tank is full of water, so that the electric water heater can be stably installed on the wall. In addition, it is possible to prevent excessive force from being applied to the first wall fixing portion or the first fixing member due to tilting of the casing, which would result in damage to the first wall fixing portion or the first fixing member. Effect of the Invention

[0012] According to the storage type electric hot water heater of the present invention, an appropriate installation form can be selected according to the conditions of the installation location, and product costs and construction costs can be reduced. [Brief description of the drawings]

[0013] [Figure 1] 1 is a schematic diagram of a storage type electric hot water heater according to one embodiment of the present invention; [Diagram 2] 1 is a schematic oblique view showing a state before the main body of an electric water heater is fixed to a wall via a fixing member when installing the storage type electric water heater according to one embodiment of the present invention on a wall. FIG. [Diagram 3] 1 is an oblique view of a main body of a storage type electric hot water heater according to one embodiment of the present invention, seen diagonally from below and behind. [Figure 4] 1 is a perspective view of a main body of a storage type electric hot water heater according to one embodiment of the present invention, seen diagonally from below and behind, showing a state in which the main body is fixed to a wall via a fixing member. [Diagram 5] 1 is a rear view of a storage type electric hot water heater according to one embodiment of the present invention, showing a state in which the main body is fixed to a wall via a fixing member. [Figure 6]FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5, and is a partially enlarged view showing the state in which the wall mounting portion and the first solid member of the storage type electric water heater according to one embodiment of the present invention are engaged with each other. [Figure 7] 1 is a schematic oblique view showing a state before the main body of an electric water heater according to one embodiment of the present invention is fixed to a floor via a fixing member when the electric water heater is installed on a floor. FIG. [Figure 8] 1 is a perspective view of a main body of a storage type electric hot water heater according to one embodiment of the present invention, seen diagonally from below and behind, showing the main body fixed to the floor via a fixing member. [Figure 9] 9 is a partial side cross-sectional view of the bottom of a storage type electric water heater according to one embodiment of the present invention taken along line IX-IX in FIG. 8, showing the state in which the floor fixing portion of the electric water heater and the first solid member are engaged. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, a storage type electric hot water heater according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic diagram of a storage type electric hot water heater according to one embodiment of the present invention. First, as shown in FIG. 1, a storage type electric water heater 1 according to one embodiment of the present invention includes an electric water heater main body 2 and an operation unit 4 that enables operation of the electric water heater main body 2. Next, as shown in FIG. 1, inside the electric water heater main body 2, there are provided a water passage 6, a hot water side solenoid valve 8, a cold water side solenoid valve 10, a hot water storage tank 12, an electric heater 14, a hot water / cold water mixing valve 16, an air intake valve 18, an air intake passage 20, and a control unit 22, etc. As shown in FIG. 1, the electric water heater main body 2 includes a casing 24 provided so as to cover the outside of these internal elements 6-22. Furthermore, the storage type electric hot water heater 1 of this embodiment is provided with a first fixing member 26 and a second fixing member 28 (details will be described later) that enable the electric hot water heater main body 2 to be fixed to a wall surface or a floor surface. This allows the electric hot water heater 1 to be fixed to a wall surface or a floor surface by using the common first fixing member 26 and second fixing member 28 in combination depending on the installation situation of the installation location. Details of the specific fixing structure of the electric water heater 1 in each case where the electric water heater main body 2 is fixed to a wall surface and to a floor surface using the common first fixing member 26 and second fixing member 28 will be described later.

[0015] 1, the operating unit 4 enables the operation of several settings of the electric hot water heater 1. Specifically, the operating unit 4 can electrically operate settings related to the operation of each part of the electric hot water heater 1 using power supplied from a power source (not shown), and can operate each of the hot and cold water mixing valve 16 and the air intake valve 18, which are water supply system functional parts.

[0016] As shown in FIG. 1, the upstream side of the water passage 6 is connected to a water supply source (not shown) such as a water tap, and water supplied from this water supply source (not shown) passes through it. The downstream end of the water passage 6 is an outlet 6a for hot or cold water at an appropriate temperature. As shown in FIG. 1, the water passage 6 includes a hot water side water passage 30 and a cold water side water passage 32. As shown in FIG. The hot water side water passage 30 includes a tank water passage 30a and a tank bypass water passage 30b. The tank water passage 30a is connected to the hot water storage tank 12, and the tank bypass water passage 30b is connected to the hot water mixing valve 16, bypassing the hot water storage tank 12. The water side water passage 32 branches off independently from the hot water side water passage 30 upstream of the water passage 6, and is then connected so as to merge again with the downstream side of the hot water side water passage 30 downstream of the water side water passage 32. Furthermore, a hot water side solenoid valve 8 and a cold water side solenoid valve 10 are provided in each of the hot water side water passage 30 and the cold water side water passage 32. These solenoid valves 8 and 10 function as opening and closing valves that open and close the water passages 30 and 32, respectively, and function as part of the water supply system functional section.

[0017] Next, as shown in FIG. 1, the hot water storage tank 12 is a tank that stores water supplied from the tank water passage 30a. 1, the electric heater 14 is provided in the hot water storage tank 12. The electric heater 14 functions as an electric heating section that electrically heats the water in the hot water storage tank 12. 1, the hot and cold water mixing valve 16 is provided at the connection between the downstream side of the tank water passage 30a downstream of the hot water storage tank 12 and the downstream side of the tank bypass water passage 30b. This hot and cold water mixing valve 16 opens and closes the hot water side water passage 30 downstream of the hot water storage tank 12, functions as a mixing valve that mixes hot water supplied from the hot water storage tank 12 and water supplied from the tank bypass water passage 30b, and functions as a part of the water supply system function section.

[0018] Next, as shown in FIG. 1, the intake valve 18 and the intake passage 20 enable air to be drawn into the hot water storage tank 12 by opening the intake valve 18, for example, when draining water from the hot water storage tank 12 during maintenance of the electric water heater 1, and function as part of the water supply system functional section that opens and closes the hot water storage tank 12. Furthermore, as shown in FIG. 1, the control unit 22 is provided inside the casing 24 and functions as a control unit that controls the operation of the electric water heater 1 in response to the operation of the operating portion 4.

[0019] Next, with reference to Figures 2 to 9, the details of the fixing structure for fixing the electric water heater main body 2 to the wall surface W or floor surface F using a common first fixing member 26 and second fixing member 28 for the storage type electric water heater 1 of this embodiment will be described. First, with reference to Figs. 2 to 6, a fixing structure for fixing and installing the storage type electric hot water heater 1 of this embodiment to a wall surface will be specifically described. FIG. 2 is a schematic perspective view showing a state before the main body of the electric water heater is fixed to a wall via a fixing member when the storage type electric water heater according to one embodiment of the present invention is installed on a wall. FIG. 3 is a perspective view of the main body of the storage type electric hot water heater according to one embodiment of the present invention, as viewed obliquely from below and behind. Furthermore, FIG. 4 is a perspective view of the main body of the storage type electric hot water heater according to one embodiment of the present invention, seen obliquely from below and behind, showing a state in which the main body is fixed to a wall via a fixing member. FIG. 5 is a rear view of the storage type electric hot water heater according to one embodiment of the present invention, showing a state in which the main body is fixed to a wall via a fixing member. Furthermore, Figure 6 is a cross-sectional view taken along line VI-VI in Figure 5, and is a partially enlarged view showing the state in which the wall mounting portion and the first solid member of the storage type electric water heater according to one embodiment of the present invention are engaged with each other.

[0020] 2 and 3, the casing 24 of the electric water heater main body 2 includes a front wall 34 and a rear wall 36 provided in the front-rear direction, a bottom wall 38 and a top wall 40 provided in the up-down direction, and side walls 42, 44 provided on both sides in the left-right direction. An operating unit 4 is provided on the front wall 34 of the casing 24. Next, as shown in FIG. 3, the rear wall 36 of the casing 24 includes a rearmost wall surface 36a located at the rearmost end side, and a recess 36b recessed forward from the rearmost wall surface 36a. As shown in FIGS. 2 to 4, the recess 36b of the rear wall 36 of the casing 24 is formed with a pair of left and right wall fixing holes 46a, 46b (first wall fixing portions).

[0021] 2, the first fixing member 26 is a plate-shaped metal member. Before the electric water heater main body 2 is fixed to the wall surface W, the first fixing member 26 is fixed to a first fixing position P1 on the wall surface W by a screw 48 via a pair of mounting holes 26a, 26b of the first fixing member 26. 2, the first fixing member 26 has a pair of left and right engagement protrusions 26c, 26d. Each of these engagement protrusions 26c, 26d protrudes obliquely forward and upward from its lower base end to its upper tip. As shown in Figure 6, when fixing the electric water heater main body 2 to the first fixing member 26 fixed to the wall surface W, the pair of engagement protrusions 26c, 26d can be inserted into the pair of wall fixing holes 46a, 46b in the rear wall 36 of the casing 24, respectively. 6, the engaging projections 26c, 26d of the first fixing member 26, when inserted into the wall fixing holes 46a, 46b, respectively, can engage with the upper rear wall portions 36c of the wall fixing holes 46a, 46b of the electric water heater main body 2. This allows the electric water heater main body 2 to be fixed to the wall surface W via the first fixing member 26 in a wall-hanging state.

[0022] Next, as shown in Figures 4 and 5, the second fixing member 28 is a plate-shaped member made of metal or resin that enables the casing 24 of the electric water heater main body 2 to be fixed at a second fixing position P2 lower than the first fixing position P1 on the wall surface W. 3, a recess 50 and a pair of protrusions 52, 52 for mounting the second fixing member are provided in the left-right center of the lower end of the rearmost wall surface 36a of the casing 24 as a second wall fixing portion to which the second fixing member 28 is attached. This allows the upper portion of the second fixing member 28 to fit into the recess 50 and the protrusions 52, 52. The recess 50 is also provided with a screw hole 50a. 4 and 5, a pair of fitting holes 28a, 28a and a single screw hole 28b are provided in an upper portion of the second fixing member 28. Before the casing 24 is fixed to the wall surface W, the upper portion of the second fixing member 28 is fitted in advance into the recess 50 for mounting the second fixing member of the casing 24, and the pair of fitting holes 28a, 28a of the second fixing member 28 is fitted in advance into the pair of protrusions 52, 52 for mounting the second fixing member of the casing 24. As shown in Figures 3 to 5, a screw 54 is attached from the rear side into a screw hole 28b of the second fixing member 28 that coincides with the screw hole 50a of the recess 50, so that the upper portion of the second fixing member 28 is fixed to the recess 50.

[0023] Next, as shown in FIG. 6, when each of the wall fixing holes 46a, 46b of the casing 24 engages with each of the engagement protrusions 26c, 26d of the first fixing member 26 fixed to the wall surface W, each of the wall fixing holes 46a, 46b of the casing 24 is fixed to the first fixing position P1 on the wall surface W. 4 and 5, a screw 48 is attached from the front toward the wall surface W into the long hole 28c in the lower portion of the second fixing member 28, thereby fixing the second fixing member 28 to the second fixing position P2 on the wall surface W. Then, the casing 24 is completely fixed to the wall surface W at both the first fixing position P1 and the second fixing position P2.

[0024] In particular, the recess 50 and the pair of protrusions 52, 52 for mounting the second fixing member, which is the second wall fixing portion, and the second fixing member 28 function to regulate the disengagement of the first fixing member 26, which is fixed to the wall surface W, from the first wall fixing holes 46a, 46b of the casing 24 when they are engaged with each other. Furthermore, as shown in FIG. 4, a second wall fixing portion A similar to the recess 50 for attaching the second fixing member and a pair of protrusions 52, 52 described above is provided on both the left and right sides of the rearmost wall surface 36a of the casing 24, making it possible to attach the second fixing member 28 to the second wall fixing portion A. As a result, the second wall fixing portion A, together with the second fixing member 28, functions to regulate the disengagement of the first fixing member 26, which is fixed to the wall surface W, from the first wall fixing holes 46a, 46b of the casing 24.

[0025] Here, as shown in Figures 3 to 6, when the first fixing member 26 is fitted into the recess 36b of the casing 24 and the second fixing member 28 is fitted into the recess 50 and the protrusion 52 of the casing 24, the surfaces A1, A2 on the wall surface W side of the first fixing member 26 and the second fixing member 28 are set to be flush with each other and the rearmost wall surface 36a of the casing 24. This allows the casing 24 to be stably fixed to the wall surface W with almost no gap between the rearmost wall surface 36a of the casing 24 and the wall surface W.

[0026] Next, as shown in FIG. 5, the wall fixing holes 46a, 46b of the casing 24 are positioned above the center of gravity G of the electric water heater 1 when the hot water tank 12 is full of water. This makes it possible to suppress the force tilting the casing 24 away from the wall surface W compared to when the wall fixing holes 46a, 46b of the casing 24 are located at the same height as or lower than the center of gravity G of the electric water heater 1 when the hot water storage tank 24 is full of water, thereby allowing the electric water heater 1 to be installed stably on the wall surface W. In addition, by tilting the upper portion of the casing 24 forward, excessive force is applied to the wall fixing holes 46a, 46b and the first fixing member 26, which can prevent the wall fixing holes 46a, 46b and the first fixing member 26 from being damaged.

[0027] Next, a fixing structure for fixing and installing the storage type electric hot water heater 1 of this embodiment to a floor surface F will be specifically described with reference to Figs. 3 and 7 to 9. FIG. 7 is a schematic perspective view showing a state before the main body of the electric water heater is fixed to the floor via a fixing member when the storage type electric water heater according to one embodiment of the present invention is installed on a floor. FIG. 8 is a perspective view of the main body of the storage type electric hot water heater according to one embodiment of the present invention, seen obliquely from below and behind, showing a state in which the main body is fixed to the floor via a fixing member. Furthermore, Figure 9 is a partial side cross-sectional view of the bottom of a storage type electric water heater according to one embodiment of the present invention taken along line IX-IX in Figure 8, showing the state in which the floor fixing portion of the electric water heater and the first solid member are engaged.

[0028] 7, before the electric water heater main body 2 is fixed to the floor surface F, the first fixing member 26 is fixed to the first fixing position Q1 on the floor surface W by screws 48 through a pair of mounting holes 26a, 26b of the first fixing member 26. This makes it possible to use the first fixing member 26 both when the casing 24 is fixed to the wall surface W and when it is fixed to the floor surface F. As shown in FIG. 7, when the first fixing member 26 is fixed to the floor surface F, each of the engaging projections 26c, 26d protrudes obliquely forward and upward from a base end on the rear side to a tip end on the front side.

[0029] Next, as shown in FIG. 3, the bottom wall 38 of the casing 24 of the electric water heater main body 2 is provided with a plurality of legs 58, 60, 62. 3, 8 and 9, the leg portion 58 is provided on the bottom wall 36 of the casing 24 at the side closest to the rear wall 36. Also, on the rear side of the leg portion 58, engagement portions 64b, 64a for fixing to the floor (first floor fixing portions) are provided which are engageable from the front side with the pair of engagement protrusions 26c, 26d of the first fixing member 26 fixed to the floor surface F, respectively. As shown in Figures 3 and 7 to 9, when fixing the casing 24 to the floor surface F, the engagement portions 64b, 64a provided on the bottom wall 36 of the casing 24 closest to the rear wall 36 can be moved from the front side to the rear side toward the first fixing member 26 fixed to the floor surface F, so that they can engage with the engagement protrusions 26c, 26d of the first fixing member 26 from the front side. Furthermore, when the engaging portions 64b, 64a and the engaging projections 26c, 26d are engaged with each other, the electric water heater main body 2 is fixed to the floor surface F via the first fixing member 26.

[0030] Next, as shown in Figures 3, 8 and 9, each leg 60, 62 has a recess 60a, 62a (second floor fixing portion) for attaching the second fixing member that is recessed upward from its lower end, and the second fixing member 28 can be fitted into each recess 60a, 62a from below. As shown in Figs. 3 and 8, each of the recesses 60a, 62a is provided with a pair of protrusions 60b, 60b and a pair of protrusions 62b, 62b for mounting the second fixing member, and also with screw holes 60c, 62c. As a result, before the casing 24 is fixed to the floor surface F, a portion of the second fixing member 28 is pre-fitted into the recess 60a or 62a for mounting the second fixing member of the casing 24, and a pair of mating holes 28a, 28a (see Figure 8) of the second fixing member 28 is pre-fitted into a pair of protrusions 60b, 60b or protrusions 62b, 62b for mounting the second fixing member of the casing 24. As shown in FIG. 8, a screw 54 is attached from below to a screw hole 28b of the second fixing member 28 that coincides with the screw hole 60c or 62c in the recess 60a or 62a, so that a portion of the second fixing member 28 is fixed to the recess 60a or 62a. In the present embodiment shown in Figure 8, a form is described in which the second fixing member 28 is fixed to the recess 60a of only the leg 60, but the second fixing member 28 may be fixed to the recess 62a of the leg 62, or may be fixed to each of the recesses 60a, 62a of both legs 60, 62.

[0031] Next, as shown in Figure 9, when each of the engagement portions 64b, 64a for fixing the casing 24 to the floor engages with each of the engagement protrusions 26c, 26d of the first fixing member 26 fixed to the floor surface F, each of the engagement portions 64b, 64a for fixing the casing 24 to the floor is fixed to the first fixing position Q1 on the floor surface F. 8 and 9, the screws 48 are attached from above toward the floor surface F into the long holes 28c of the second fixing member 28, thereby fixing the second fixing member 28 to the second fixing position Q2 on the floor surface F. Then, the casing 24 is completely fixed to the floor surface F at both the first fixing position Q1 and the second fixing position Q2.

[0032] In particular, the recess 60a (or 62a) and the pair of protrusions 60b, 60b (or 62b, 62b) for attaching the second fixing member, which is the second wall fixing portion, and the second fixing member 28 function to regulate the disengagement between the first fixing member 26 fixed to the floor surface F and the engagement portions 64a, 64b for fixing the casing 24 to the floor when they are engaged with each other.

[0033] Here, as shown in Figures 8 and 9, when each engagement protrusion 26c, 26d of the first fixing member 26 engages with each of the engagement portions 64b, 64a of the casing 24 for floor fixing, and the second fixing member 28 is fitted into the recess 60a and protrusion 60b of the casing 24 for mounting the second fixing member, the lower end surfaces of each leg 58, 60, 62 and the surfaces A1, A2 of the first fixing member 26 and the second fixing member 28 facing the floor surface F are set to be flush with each other relative to the floor surface F. This enables the casing 24 to be stably fixed to the floor surface W with almost no gap between the lower end surfaces of each leg 58, 60, 62 of the casing 24, and between the floor surface F sides A1, A2 of the first fixing member 26 and the second fixing member 28 and the floor surface F.

[0034] Next, the operation of the storage type electric hot water heater 1 according to one embodiment of the present invention will be described with reference to Figs. According to the storage type electric water heater 1 of one embodiment of the present invention described above, by using fixing members 26, 28 that can be used both when the casing 24 is fixed to a wall surface W and when it is fixed to a floor surface F, the casing 24 can be fixed to the wall surface W or the floor surface F via the common fixing members 26, 28. In addition, when fixing the rear wall 36 of the casing 24 to a wall surface W, the first wall fixing portion (wall fixing holes 46a, 46b) of the casing 24 can be engaged with the first fixing member 26 in a state fixed to the wall surface W. Furthermore, even when fixing the bottom wall 38 of the casing 24 to the floor surface F, the same first fixing member 26 can be used to engage the first floor fixing portion of the casing 24 (engagement portions 64a, 64b for floor fixing) with the first fixing member 26 fixed to the floor surface F. Therefore, the first fixing member 26 can be made common regardless of whether the casing 24 is fixed to a wall surface W or to a floor surface F, thereby making it possible to reduce product costs and construction costs. In addition, depending on the installation location of the electric water heater 1, an installation form in which the casing 24 is fixed to a wall surface W or an installation form in which it is fixed to a floor surface F can be appropriately selected, thereby improving the ease of installation of the electric water heater 1.

[0035] Furthermore, according to the storage type electric hot water heater 1 of this embodiment, when the first wall fixing portion (wall fixing holes 46a, 46b) is engaged with each of the engagement protrusions 26c, 26d of the first fixing member 26 fixed to the wall surface W, the second fixing member 28 and the second wall fixing portion (concave portion 50 and convex portion 52 for mounting the second fixing member) are fixed. This makes it possible to reliably restrict disengagement between each of the engagement protrusions 26c, 26d of the first fixing member 26 and the first wall fixing portion (wall fixing holes 46a, 46b). Therefore, the electric hot water heater 1 can be stably fixed to the wall surface W. In addition, when the first floor fixing portion (floor fixing engaging portions 64b, 64a) is engaged with the engaging projections 26c, 26d of the first fixing member 26 fixed to the floor surface F, the second fixing member 28 and the second floor fixing portion (second fixing member mounting recesses 60a, 62a and protrusions 60b, 62b) are fixed. This reliably restricts the disengagement of the engaging projections 26c, 26d of the first fixing member 26 and the first floor fixing portion (floor fixing engaging portions 64b, 64a). Therefore, the electric water heater 1 can be stably fixed to the floor surface F.

[0036] Furthermore, according to the storage type electric hot water heater 1 of this embodiment, since the second wall fixing portion (the recess 50 and the protrusion 52 for attaching the second fixing member) is provided on the rear wall 36 of the casing 24, when the rear wall 36 of the casing 24 is fixed to the wall surface W, the second wall fixing portion (the recess 50 and the protrusion 52 for attaching the second fixing member) and a part of the second fixing member 28 can be concealed between the casing 24 and the wall surface W. As a result, in the electric hot water heater 1 in the installed state, the second wall fixing portion (the recess 50 and the protrusion 52 for attaching the second fixing member) and a part of the second fixing member 28 are not exposed, and the appearance is not impaired. Similarly, since the second floor fixing parts (the recesses 60a, 62a and the protrusions 60b, 62b for attaching the second fixing member) are provided on the legs 60, 62 of the bottom wall 38 of the casing 24, when the bottom wall 38 of the casing 24 is fixed to the floor surface F, the second floor fixing parts (the recesses 60a, 62a and the protrusions 60b, 62b for attaching the second fixing member) and a part of the second fixing member 28 can be concealed between the casing 24 and the floor surface F. As a result, in the electric water heater 1 in the installed state, the second floor fixing parts (the recesses 60a, 62a and the protrusions 60b, 62b for attaching the second fixing member) and a part of the second fixing member 28 are not exposed, and the appearance is not impaired.

[0037] According to the storage type electric hot water heater 1 of this embodiment, when the casing 24 is fixed to the wall surface W, the first wall fixing portion (wall fixing holes 46a, 46b) and the second wall fixing portion (recess 50 and protrusion 52 for mounting the second fixing member) of the casing 24 are fixed to the wall surface W via the first fixing member 26 and the second fixing member 28, respectively. During such fixing, the first fixing member 26 and the second fixing member 28 are fitted into the first recess 36b of the first wall fixing portion and the second recess 50 of the second wall fixing portion, respectively, and the surfaces A1, A2 of the first fixing member 26 and the second fixing member 28 on the wall surface W side are flush with the rearmost wall surface 36a of the casing 24. Therefore, there is almost no gap between the rearmost wall surface 36a of the casing 24 and the wall surface W, and the casing 24 can be stably fixed to the wall surface W.

[0038] Furthermore, according to the storage type electric water heater 1 of this embodiment, when the casing 24 is fixed to the floor surface F, the first floor fixing part (the engagement parts 64b, 64a for floor fixing) provided on the bottom wall 38 of the casing 24 closest to the rear wall 36 is moved toward the engagement protrusions 26c, 26d of the first fixing member 26 fixed to the floor surface F. This allows the first floor fixing part (the engagement parts 64b, 64a for floor fixing) to easily engage with the first fixing member 26 from the front side. Therefore, ease of installation when fixing the electric water heater 1 to the floor surface F can be improved.

[0039] Furthermore, according to the hot water storage type electric water heater 1 of this embodiment, when the casing 24 is fixed to the wall surface W, the first wall fixing portion (wall fixing holes 46a, 46b) of the casing 24 is located above the center of gravity G of the electric water heater 1 when the hot water storage tank 12 is full of water. This makes it possible to suppress the force that tilts the casing 24 in a direction away from the wall surface W compared to when the first wall fixing portion (wall fixing holes 46a, 46b) of the casing 24 is located at the same height as or lower than the center of gravity G of the electric water heater when the hot water storage tank 12 is full of water, so that the electric water heater 1 can be stably installed on the wall surface W. In addition, it is possible to prevent excessive force from acting on the first wall fixing portion (wall fixing holes 46a, 46b) or the engaging protrusions 26c, 26d of the first fixing member 26 due to tilting of the casing 24, which would result in damage to the first wall fixing portion (wall fixing holes 46a, 46b) or the first fixing member 26.

[0040] In addition, in the storage type electric water heater 1 according to one embodiment of the present invention and the storage type electric water heater 100 according to the second embodiment described above, a configuration has been described that employs a so-called "main stop type" in which water can be stopped by operating the hot water side solenoid valve 8 on the upstream side (primary side) of the hot water storage tank 12, but other configurations can also be adopted. That is, as another embodiment, a so-called "first-stop type" may be adopted in which water can be stopped by operating an on-off valve or the like on the downstream side (secondary side) of the hot water storage tank 12. When such a "first-stop type" is adopted, for example, a relief valve may be provided in the hot water storage tank 12, and a relief valve lever for manually operating the relief valve may be provided in the operation unit 4. In this way, when the relief valve malfunctions due to the valve body of the relief valve sticking, the valve body of the relief valve may be opened by operating the relief valve lever, thereby making it possible to resolve the malfunction of the relief valve. [Explanation of symbols]

[0041] 1. Storage type electric water heater 2 Electric water heater body 4 Control section 6 Waterway 6a exit 8 Hot water side solenoid valve (water supply system function part) 10 Water side solenoid valve (water supply system function part) 12 Hot water tank (tank) 14 Electric heater (electric heating section) 16 Hot and cold water mixing valve (water supply system function part, mixing valve) 18 Intake valve (water supply system function part) 20 Intake passage (water supply system function part) 22 Control unit (control section) 24 Casing 26 First fixing member 26a Mounting hole 26b Mounting hole 26c Engagement protrusion 26d Engagement protrusion 28 Second fixing member 28a Fitting hole 28b screw hole 28c long hole 30 Hot water side water channel 30a Tank waterway 30b Tank bypass waterway 32 Water side waterway 34 Casing front wall 36 Rear wall of casing 36a Last wall 36b Recess (first recess of first wall fixing part) 36c rear wall 38 Bottom wall of casing 40 Casing top wall 42 Casing side wall 44 Casing sidewall 46a Wall fixing hole (first wall fixing part, first recess) 46b Wall fixing hole (first wall fixing part, first recess) 48 Bis 50 Recess for mounting second fixing member (second wall fixing portion, second recess) 50a screw hole 52 Convex portion for mounting second fixing member (second wall fixing portion) 54 Bis 58 Legs 60 Legs 60a: Recess for mounting second fixing member (second floor fixing part) 60b: Protrusion for mounting the second fixing member (second floor fixing part) 60c screw hole 62 Legs 62a: Recess for mounting second fixing member (second floor fixing part) 62b: Convex portion for mounting the second fixing member (second floor fixing portion) 62c screw hole 64a Engagement portion for fixing to floor (first floor fixing portion) 64b Engagement portion for fixing to floor (first floor fixing portion) A Fixed part for second wall A1 Wall side surface of the first fixing member A2 Wall side surface of the second fixing member P1 1st fixed position P2 2nd fixed position Q1 1st fixed position Q2 2nd fixed position W wall F Floor

Claims

1. A hot water storage type electric water heater that can supply hot water stored in the water storage tank, a waterway through which water supplied from a water supply source flows; A tank that stores water supplied from this waterway, an electric heating unit that electrically heats the water in the tank; a water supply system function unit that opens and closes the water passage or the tank; a casing provided to cover the water passage, the tank, the electric heating unit, and the water supply system functional unit from the outside; A first fixing member for fixing the casing to a wall and a second fixing member for fixing the casing to a wall or a floor, for selecting an installation form of the electric water heater according to the situation of the installation location, The casing includes a front wall and a rear wall provided in a front-rear direction, a bottom wall and a top wall provided in a top-bottom direction, and side walls provided on both sides in a left-right direction, The casing comprises a first wall fixing part provided on a rear wall of the casing so as to be fixable to a first fixing position of the wall via the first fixing member, a second wall fixing part having a first screw hole so as to be fixable to a second fixing position of the wall via the second fixing member, and a floor fixing part having a second screw hole so as to be fixable to the floor via the second fixing member, the first fixing member including a third screw hole and a first screw attached to the third screw hole, the second fixing member including a fourth screw hole coinciding with the second screw hole and a second screw attached to the fourth screw hole, When the rear wall of the casing is fixed to the wall, the first fixing member is fixed to the wall by attaching the first screw to the third screw hole, and the second fixing member and the second wall fixing portion restrict disengagement between the first fixing member and the second wall fixing portion when the first wall fixing portion is engaged with the first fixing member fixed to the wall, This electric water heater is characterized in that, when the bottom wall of the casing is fixed to the floor, the second fixing member is fixed to the floor fixing portion by attaching the second screw to the second screw hole and the fourth screw hole.

2. The floor fixing part is fixable to the second fixing position of the floor via the second fixing member, 2. The electric water heater according to claim 1, wherein the second wall fixing part is provided on a rear wall of the casing, and the floor fixing part is provided on a bottom wall of the casing.

3. 3. The electric water heater according to claim 1, wherein the first wall fixing portion is located above a center of gravity of the electric water heater when the tank is full of water.

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