Storage water heater
The hot water storage device simplifies assembly and reduces weight and costs by using bent side panels and fixing brackets to secure exterior plates without a frame, addressing complexity and misalignment issues in existing systems.
Patent Information
- Application Number
- JP2024070285
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2025-11-06
AI Technical Summary
Existing hot water storage systems face challenges with complex and heavy frames that increase manufacturing costs and complicate assembly and maintenance, while alternative designs risk misalignment during installation and are aesthetically undesirable.
A hot water storage device with a box-shaped outer case that uses bent side panels and fixing brackets with protrusions to secure flat exterior plates without a frame, allowing easy attachment and reducing component count and weight.
Facilitates easy assembly and maintenance by eliminating the need for frames, reduces weight and manufacturing costs, and improves aesthetic appeal by minimizing conspicuous joints.
Smart Images
Figure 2025166343000001_ABST
Abstract
Description
[Technical Field]
[0001] The present invention relates to a hot water storage and hot water supply device equipped with a hot water storage tank for storing heated hot water. [Background technology]
[0002] Hot water storage and heating systems have been widely used for a long time, storing heated water in a hot water storage tank and using the stored water for hot water supply. The hot water storage tank is fitted with a heat insulating material, for example, made of a molded foamed resin, to prevent the heat of the stored hot water from escaping to the outside. The hot water storage tank is generally a cylindrical container closed at both ends with end plates, fixed in an upright position with the axis of the cylinder vertical, and housed in a box-shaped exterior case.
[0003] The exterior case is formed into a box shape by fastening a top plate having a peripheral wall, a bottom plate, and flat exterior plates (front plate, rear plate, left and right side plates) that cover the front, rear, left and right sides, to a frame made up of, for example, multiple pillars extending up and down and beams connecting these pillars. A plurality of fastening members, for example, screws, are used to fasten the exterior plates.
[0004] When fixing the exterior plate, the upper end of the exterior plate is inserted inside the peripheral wall of the top plate fixed to the frame, and the lower part is temporarily fixed in a state where it is supported by, for example, the bottom plate, and then the exterior plate is fixed to the frame with multiple fastening members, or the exterior plates are connected and fixed to each other. By temporarily fixing the flat exterior plate that does not stand on its own, the exterior plate will not fall over even without support, and can be easily fixed with the fastening members.
[0005] However, an outer case with a frame is complex and heavy, and requires high manufacturing costs. Furthermore, the presence of a frame can make assembly and maintenance of the hot water storage and heating system difficult. While frames have also been used to secure heavy equipment, frames are not necessary if the outer case does not house heavy equipment other than the hot water storage tank.
[0006] For this reason, there is known an exterior case in which a thermal insulation material is attached to a hot water storage tank fixed in an upright position, and exterior plates covering the rear surface and the left and right sides are connected and fixed together with connecting members, as in Patent Document 1. There is also known an exterior case in which a thermal insulation material is attached to a hot water storage tank fixed in an upright position, and exterior plates covering the rear surface and the left and right sides are fixed to mounting brackets attached to the thermal insulation material, as in Patent Document 2. [Prior art documents] [Patent documents]
[0007] [Patent Document 1] Patent No. 5280153 [Patent Document 2] Patent No. 5807627 Summary of the Invention [Problem to be solved by the invention]
[0008] In Patent Document 1, the left and right side panels of the exterior panel are slid forward, respectively, so that the folded portions, which are formed by folding the rear ends of the side panels forward inside the exterior case, are inserted into the heat insulating material, and the side panels are temporarily fixed. At this time, there is a risk that the side panels will be temporarily fixed in a position tilted to the left or right. Furthermore, if the temporary fixing is redone, there is a risk that the portions where the folded portions of the heat insulating material are inserted will be damaged, and it is not easy to correct the position of the side panels.
[0009] In Patent Document 2, an exterior panel with an L-shaped horizontal cross section is fixed to a mounting bracket attached to a cutout in a thermal insulation material. Although an exterior panel with an L-shaped horizontal cross section can stand on its own, it is large and heavy, which increases the workload for installing the exterior panel. Furthermore, since the joints of the exterior panel cannot be located at corners, the joints are conspicuous, which may be undesirable from the perspective of exterior design.
[0010] Therefore, there has been a demand for an exterior case that houses a hot water storage tank of a hot water storage device that can easily attach a flat exterior plate that does not stand on its own, even without a frame.The object of the present invention is to provide a hot water storage device having an exterior case that can easily attach a flat exterior plate. [Means for solving the problem]
[0011] The hot water storage and heating device of the invention of claim 1 is a hot water storage and heating device having a hot water storage tank covered with thermal insulation material and a box-shaped outer case that houses the hot water storage tank, wherein the outer case has a top plate, a bottom plate, a front plate, a rear plate, and left and right side plates, and the left and right side plates each have rear ends that are bent so as to extend toward each other, and an opening that penetrates the rear ends in the front and rear directions, the thermal insulation material has a pair of left and right protrusions that protrude rearward, and fixing brackets with protrusions that extend rearward are each attached to the protrusions, restricting movement of the fixing brackets in the vertical and left-right directions, and the left and right side plates are configured so that the protrusions of the corresponding fixing brackets are inserted into the openings from the front, and the rear ends are placed on the protrusions.
[0012] According to the above configuration, the fixing brackets having protrusions extending rearward are attached to the corresponding protrusions of the thermal insulation material, restricting their movement in the up-down and left-right directions. The left and right side panels have rear ends bent toward each other, and each rear end has an opening extending from front to back. When attaching the left and right side panels, the protrusions of the corresponding fixing brackets are inserted into the openings from the front and placed on the protrusions, preventing the left and right side panels from tipping over, and the left and right side panels are temporarily fixed to the hot water storage tank. Therefore, since the left and right side panels do not need to be supported to prevent tipping over when temporarily fixed, they can be easily fixed using, for example, fastening members.
[0013] The hot water storage and heating device of the invention of claim 2 is characterized in that, in the invention of claim 1, the temporarily fixed left and right side plates are each fixed to the corresponding fixing brackets by fastening members, and the rear plate is fixed by fastening members to the fixing brackets to which the left and right side plates are fixed. According to the above configuration, the temporarily fixed left and right side panels are fixed to the corresponding fixing brackets, and the rear panel is fixed to these fixing brackets. The fixing brackets attached to the protruding parts are restricted from moving rearward because the left and right side panels are fixed, and are prevented from falling off the protruding parts, thereby securing the rear panel. Therefore, the fixing brackets used to temporarily fix and secure the left and right side panels can also be used to secure the rear panel, thereby reducing the number of components of the exterior case, thereby achieving weight reduction and lower manufacturing costs.
[0014] The hot water storage and heating device of the invention of claim 3 is characterized in that, in the invention of claim 1 or 2, the outer case has a middle plate extending upward from the bottom plate and a middle bottom plate extending forward from the upper end of the middle plate and to which the lower end of the front plate is fixed, and the left and right side plates each have a mounting portion at their front end for placing on the middle bottom plate. According to the above configuration, the front ends of the left and right side panels are formed with mounting portions for placing the side panels on the middle bottom panel, which is located above the bottom panel. When attaching the side panels, the rear and front ends of the side panels are supported by the corresponding fasteners and the middle bottom panel, temporarily securing the side panels together. Therefore, the side panels can be easily secured together without the need to support them to prevent them from tipping over. [Effects of the Invention]
[0015] According to the hot water storage and heating device of the present invention, the flat exterior plate can be easily attached to the exterior case that houses the hot water storage tank. [Brief explanation of the drawings]
[0016] [Figure 1] 1 is a diagram illustrating the configuration of a hot water storage tank and hot water supply device according to an embodiment of the present invention. [Figure 2]FIG. 2 is an external perspective view of a hot water storage unit of a hot water storage and heating apparatus according to an embodiment of the present invention. [Figure 3] FIG. 3 is an assembly diagram of the main parts of the outer case of the hot water storage unit of FIG. 2. [Figure 4] FIG. 4 is a perspective view showing the rear part of the heat insulating material of FIG. 3. [Figure 5] 5 is a perspective view showing a fastening metal fitting attached to a protruding portion of the heat insulating material of FIG. 4. FIG. [Figure 6] FIG. 6 is a perspective view showing the rear side of the fixing bracket of FIG. 5. [Figure 7] FIG. 7 is a perspective view showing the front side of the fixing bracket of FIG. 6. [Figure 8] FIG. 10 is a perspective view of a main portion of the left side plate temporarily fixed to the fixing member. [Figure 9] FIG. 10 is a perspective view of the main part showing the placement portion of the left side plate. [Figure 10] FIG. 10 is a rear view of the main part showing the installation of the top plate after the left and right side plates are fixed. [Figure 11] FIG. 10 is a rear view showing the rear plate fixed after the top plate is fixed. DETAILED DESCRIPTION OF THE INVENTION
[0017] Hereinafter, the mode for carrying out the present invention will be described based on examples. [Example]
[0018] First, the configuration of the hot water storage and heating apparatus 1 of the present invention will be described. As shown in Figure 1, the hot water storage and heating system 1 includes a hot water storage unit 3 having a hot water storage tank 2 for storing heated hot water, a main heat source unit 4, and an auxiliary heat source unit 5. The main heat source unit 4 is, for example, a heat pump heat source unit. The hot water storage tank 2 stores the hot water heated by the main heat source unit 4.
[0019] The hot water storage unit 3 has a water supply passage 6 that supplies clean water to the hot water storage tank 2, a hot water outlet passage 7 that discharges the hot water in the hot water storage tank 2 from the hot water storage unit 3, and a water supply bypass passage 9 that branches off from the water supply passage 6 and is connected to the hot water outlet passage 7 at a mixing valve 8. The water supply passage 6 is equipped with a water supply temperature sensor 6a that detects the temperature of the clean water. Upstream of the mixing valve 8, the hot water outlet passage 7 is equipped with a tank outlet hot water temperature sensor 7a that detects the temperature of the hot water being discharged from the hot water storage tank 2. Downstream of the mixing valve 8, the hot water outlet passage 7 is equipped with an outlet hot water temperature sensor 7b that detects the temperature of the hot water being discharged from the hot water storage unit 3 (outlet hot water temperature), and an outlet hot water flow rate sensor 7c that detects the flow rate.
[0020] Hot water discharged from the hot water storage unit 3 is supplied from the hot water tap 10 via the auxiliary heat source device 5. The auxiliary heat source device 5 is, for example, a combustion-type water heater. This auxiliary heat source device 5 supplies the hot water to the hot water tap 10 either heated or unheated, depending on the temperature of the hot water supplied from the hot water storage unit 3 (hot water outlet temperature). In order to adjust the outlet hot water temperature, the hot water storage unit 3 is equipped with a control unit 11 that controls the mixing ratio of the hot water from the hot water storage tank 2 and the clean water in the mixing valve 8 based on the temperatures detected by the feed water temperature sensor 6a and the tank hot water outlet temperature sensor 7a. This control unit 11 is connected to and communicates with the auxiliary heat source device 5 via, for example, an operation remote control 12, and controls the auxiliary heat source device 5.
[0021] Next, the hot water storage unit 3 will be described. As shown in Figures 2 and 3, the hot water storage unit 3 has a box-shaped outer case 20 that houses the hot water storage tank 2 fixed in an upright position. The hot water storage tank 2 is a cylindrical container closed at both ends by end plates, and the upright position is when the axis of the cylinder is vertical. Arrows U, F, and L in the figures indicate the upper, front, and left directions of the outer case 20, respectively.
[0022] The exterior case 20 has a top plate 21, a bottom plate 22, a front plate 23, a rear plate 24, and left and right side plates 25, 26, and covers the hot water storage tank 2 covered with the thermal insulation material 30 to protect it from wind, rain, etc. The bottom plate 22 is fixed to legs that secure the hot water storage tank 2. Although not shown in the figure, the water supply passage 6, the hot water outlet passage 7, etc. are arranged in spaces provided above and in front of the thermal insulation material 30.
[0023] The top panel 21 has a rectangular flat top surface 21a, a peripheral wall 21b extending downward from the outer periphery of the top surface 21a, a front fixing member 21c, and a rear fixing member 21d. The top surface 21a is equipped with a plurality of fastening members (e.g., screws) for fixing to the exterior wall of a building. Holes are pre-drilled in the areas to be fixed with the fastening members.
[0024] A bottom plate 22, disposed below the hot water storage tank 2, is fixed to legs (not shown) that secure the hot water storage tank 2, and has a middle plate 27 at its front end that extends upward from the bottom plate 22. A middle bottom plate 28 extends forward from the upper end of the middle plate 27. Fittings for piping connected to the water supply passage 6, hot water outlet passage 7, etc. are fixed to the middle bottom plate 28. The space below the middle bottom plate 28 is a piping space in which piping is housed, and the piping space can be accessed by removing a front piping cover 29 attached to the underside of the front plate 23.
[0025] An insertion portion 24a is formed at the upper end of the rear plate 24. The insertion portion 24a extends toward the inside of the exterior case 20 and is then bent upward so as to be inserted into the inside of the peripheral wall portion 21b of the top plate 21. A placement portion 24b for placing the rear plate 24 on the bottom plate 22 and a fixing portion 24c for fixing the rear plate 24 to the bottom plate 22 with a fastening member are formed at the lower part of the rear plate 24. The left and right ends of the rear plate 24 are each bent so as to extend forward, and together with the insertion portion 24a, this prevents the rear plate 24 from bending (deforming).
[0026] Like the rear plate 24, the right side plate 26 has an insertion portion 26a at its upper end that is bent to be inserted inside the top plate 21, and the front end 26b and rear end 26c are bent so as to extend leftward toward the left side plate 25, preventing the right side plate 26 from bending. The front end 26b and rear end 26c serve as fixing portions for fixing the right side plate 26 to the corresponding middle bottom plate 28 and bottom plate 22 with fastening members. In addition, the front fixing member 21c and rear fixing member 21d of the top plate 21 are fixed to the front end 26b and rear end 26c with fastening members.
[0027] The right side plate 26 has a mounting portion 26d formed by cutting out the front end portion 26b so that it can be placed on the middle bottom plate 28. An opening 26e that penetrates the rear end portion 26c from front to rear is formed in a portion corresponding to a fixing bracket 35, which will be described later. The front end portion 26b is formed by being folded back toward the rear and then bending to extend to the right, thereby increasing its rigidity. The rear end portion 26c is formed by being folded back toward the front and then bending to extend to the right, thereby increasing its rigidity.
[0028] Like the right side plate 26, the left side plate 25 has an insertion portion 25a at its upper end, and a front end 25b and a rear end 25c are bent so as to extend rightward toward the right side plate 26, preventing the left side plate 25 from bending. The front end 25b and the rear end 25c are fixed to the corresponding middle-stage bottom plate 28 and bottom plate 22 with fastening members. The front end 25b is formed with a mounting portion 25d similar to the mounting portion 26d so as to correspond to the middle-stage bottom plate 28. The rear end 25c is formed with an opening 25e similar to the opening 26e. Like the right side plate 26, the front end 25b and the rear end 25c have increased rigidity.
[0029] Like the rear plate 24, the front plate 23 has an insertion portion 23a at its upper end that is bent to be inserted inside the peripheral wall portion 21b of the top plate 21, and the lower end of the front plate 23 is fixed to the front end of the middle bottom plate 28 by a fastening member. The front plate 23 is also fixed to the left and right side plates 25, 26 via connecting fittings (not shown).
[0030] The heat insulating material 30 is composed of a front heat insulating material 31 and a rear heat insulating material 32, each made of a molded foam resin, but these may be separable into upper and lower parts, for example. The heat insulating material 30 abuts against the top plate 21, front plate 23, rear plate 24, and left and right side plates 25, 26, respectively, and supports them from the inside of the exterior case 20, thereby preventing the top plate 21, front plate 23, rear plate 24, and left and right side plates 25, 26 from bending.
[0031] As shown in Figures 4 and 5, the rear heat insulating material 32 of the heat insulating material 30 has, in a middle section of its rear surface, fastening fittings 35 for fastening the rear panel 24 and the left and right side panels 25, 26, which are among the exterior panels. The semi-cylindrical rear heat insulating material 32 has a pair of left and right protruding portions 34, each of which has a rectangular column shape, protruding rearward from the rear surface of the left and right abutting portions 33 in the middle section, among a plurality of abutting portions that protrude from the outer periphery to abut against the rear panel 24 and the left and right side panels 25, 26. A fastening fitting 35 is attached to each of these protruding portions 34. Note that each abutting portion has a projection for abutting against the rear panel 24, which protrudes rearward by the same amount as the attached fastening fitting 35.
[0032] 6 and 7, the left-side fixing bracket 35 is formed symmetrically in the up and down direction by, for example, cutting out and bending a steel plate, and has a rectangular rear panel fixing portion 35a to which the rear panel 24 is fixed by a fastening member, and a rectangular side panel fixing portion 35b to which the left side panel 25 is fixed by a fastening member. The rear panel fixing portion 35a is formed with clamping portions 35c extending forward from the upper and lower ends of the rear panel fixing portion 35a, respectively, to clamp the protruding portion 34 so as to compress it from above and below.
[0033] The left end of rear panel fixing portion 35a is bent so as to extend forward and is connected to the right end of side panel fixing portion 35b. The left end 35d of side panel fixing portion 35b is bent so as to extend forward. A protrusion 35e is formed in the center of side panel fixing portion 35b, cutting and raising the left side as the base end and extending rearward. A return portion 35f is formed at the tip of protrusion 35e so as to extend vertically, and has a larger vertical width than the base end. The right-side fixing bracket 35 is obtained by rotating the left-side fixing bracket 35 180 degrees around the front-to-rear axis, so that the left and right sides are reversed, and therefore a description thereof will be omitted.
[0034] 5, the clamping portions 35c of the left and right fixing brackets 35 are fitted into the corresponding protrusions 34 from behind, and the tips of the clamping portions 35c and the ends 35d of the side panel fixing portions 35b are inserted into the abutment portions 33, respectively, so that the rear panel fixing portions 35a abut against the rear surfaces of the protrusions 34, and the side panel fixing portions 34b abut against the rear surfaces of the abutment portions 33. This prevents the fixing brackets 35 from falling off rearward due to their own weight, and restricts movement of the fixing brackets 35 in the up-down and left-right directions. Note that the abutment portions 33 may have notches formed in advance for inserting the ends 35d of the side panel fixing portions 35b.
[0035] Next, the attachment of the left and right side plates 25, 26 will be described using the left side plate 25 as an example. As shown in Fig. 8, the left side panel 25 is temporarily fixed to the fixing metal fitting 35 on the left side of the thermal insulation material 30 attached to the hot water storage tank 2. At this time, the protrusion 35e is inserted from the front into the opening 25e of the rear end 25c of the left side panel 25 formed to correspond to the fixing metal fitting 35, and the rear end 25c is placed on (hooked onto) the protrusion 35e. The return portion 35f formed on the protrusion 35e prevents the left side panel 25 from falling off the protrusion 35e.
[0036] 9, the left side plate 25 is brought into contact with the left surface of the thermal insulation material 30, and the placement portion 25d formed on the front end portion 25b of the left side plate 25 is placed on the middle bottom plate 28. In this way, the front end portion 25b and the rear end portion 25c of the left side plate 25 are supported, and the left side plate 25 is prevented from falling over, and is temporarily fixed to the hot water storage tank 2.
[0037] The left side plate 25, which has been temporarily fixed so that it will not tip over even without support, can easily have its rear end 25c fixed to the fixing bracket 35 with fastening members 40 as shown in FIG. 8, and its front end 25b easily fixed to the cut-and-raised front end of the middle bottom plate 28 with fastening members 41 as shown in FIG. 9. Although not shown, the lower end portion of the rear end 25c of the left side plate 25 is fixed to the bottom plate 22 with fastening members. Note that the lower end portion of the front end 25b of the left side plate 25 may be fixed to the bottom plate 22 via, for example, a connecting bracket (not shown). Also, although not shown, the right side plate 26 can be temporarily fixed in the same manner as above and can easily be fixed with fastening members.
[0038] Next, the attachment of the top plate 21, rear plate 24, and front plate 23 will be described. 10, the top plate 21 is placed over the thermal insulation material 30 of the hot water storage tank 2 to which the left and right side plates 25, 26 are fixed, and the front fixing member 21c and the rear fixing member 21d of the top plate 21 are fixed to the front end portions 25b, 26b and rear end portions 25c, 26c of the corresponding left and right side plates 25, 26 with fastening members (not shown). At this time, the top plate 21 is fixed in a state in which the insertion portions 25a, 26a of the left and right side plates 25, 26 are inserted inside the peripheral wall portion 21b of the top plate 21. The top plate 21 is connected and fixed to the bottom plate 22 via the left and right side plates 25, 26, and is fixed to the hot water storage tank 2 covered with the thermal insulation material 30.
[0039] Although not shown in the figures, the rear plate 24 is temporarily fixed so that it will not tip over even without support by inserting the insertion portion 24a of the rear plate 24 into the inside of the peripheral wall portion 21b of the top plate and placing the mounting portion 24b on the bottom plate 22 so that it abuts against the rear surface of the heat insulation material 30. Then, as shown in Fig. 11, the temporarily fixed rear plate 24 is fixed to the left and right fixing brackets 35 and the bottom plate 22 with fastening members 42 to 45. Also, although not shown in the figures, like the rear plate 24, the front plate 23 can be fixed with fastening members while temporarily fixed to the top plate 21 and the middle bottom plate 28.
[0040] As described above, the left and right side plates 25, 26 are temporarily fixed to the hot water storage tank 2 covered with the thermal insulation material 30 using the pair of left and right fixing brackets 35 attached to the thermal insulation material 30, and the left and right side plates 25, 26 are fixed to the corresponding fixing brackets 35, bottom plate 22, and middle bottom plate 28 with fastening members. Then, the top plate 21 is fixed to the left and right side plates 25, 26 with fastening members, and the temporarily fixed rear plate 24 and front plate 23 are fixed using the top plate 21 with fastening members, respectively, to assemble the box-shaped outer case 20 as shown in Figure 2. The front piping cover 29 is attached after the front plate 23 is fixed.
[0041] The operation and effects of the hot water storage and boiler device 1 of the present invention will be described. The hot water storage and heating device 1 has a box-shaped exterior case 20 that houses a hot water storage tank 2 covered with a thermal insulation material 30. The exterior case 20 has a top plate 21, a bottom plate 22, a front plate 23, a rear plate 24, and left and right side plates 25, 26. Fixing brackets 35 having protrusions 35e extending rearward are attached to the corresponding protrusions 34 of the thermal insulation material 30, restricting movement in the up-down and left-right directions. The left and right side plates 25, 26 have rear end portions 25c, 26c that are bent toward each other, and these rear end portions 25c, 26c have openings 25e, 26e that penetrate from front to back.
[0042] When attaching the left and right side plates 25, 26, the protrusions 35e of the corresponding fixing brackets 35 are inserted into the openings 25e, 26e from the front, and the rear ends 25c, 26c are placed on the protrusions 35e, whereby the left and right side plates 25, 26 are prevented from falling over by engagement with the protrusions 35e, and the left and right side plates 25, 26 are temporarily fixed to the hot water storage tank 2. Therefore, the left and right side plates 25, 26 in the temporarily fixed state do not need to be supported to prevent them from falling over, and the temporarily fixed left and right side plates 25, 26 can be easily fixed by, for example, fastening members.
[0043] The temporarily fixed left and right side panels 25, 26 are fixed to the corresponding fixing brackets 35, and the rear panel 24 is fixed to these fixing brackets 35. Because the left and right side panels 25, 26 are fixed to the fixing brackets 35 attached to the protrusions 34, rearward movement of the fixing brackets 35 is restricted and they are prevented from falling off the protrusions 34, thereby fixing the rear panel 24. Therefore, the fixing brackets 35 used to temporarily fix and secure the left and right side panels 25, 26 can also be used to secure the rear panel 24, which reduces the number of components of the exterior case 20 and contributes to weight reduction and manufacturing costs.
[0044] The front ends 25b, 26b of the left and right side plates 25, 26 are formed with mounting portions 25d, 26d for mounting on the middle bottom plate 28, which is higher than the bottom plate 22. When attaching the left and right side plates 25, 26, the rear ends 25c, 26c and front ends 25b, 26b of the left and right side plates 25, 26 are supported by the corresponding fastening brackets 35 and the middle bottom plate 28, temporarily fixing the left and right side plates 25, 26. Therefore, there is no need to support the left and right side plates 25, 26 to prevent them from falling over, and they can be easily fixed with fastening members.
[0045] In addition, a person skilled in the art can implement the present invention in a form in which various modifications are added to the above-described embodiment without departing from the spirit of the present invention, and the present invention includes such modifications. [Explanation of symbols]
[0046] 1: Hot water storage unit 2: Hot water tank 3: Hot water storage unit 4: Main heat source machine 5:Auxiliary heat source machine 6:Water supply passage 7: Hot water passage 8: Mixing valve 9: Water supply bypass passage 10: Hot water tap 11: Control section 12: Operation remote control 20: Outer case 21: Top plate 21a: Top section 21b: Peripheral wall part 21c: Front fixing member 21d: Rear fixing member 22:Bottom plate 23: Front panel 24: Rear plate 25: Left side panel 25a: Insertion part 25b: Front end 25c: Rear end 25d: Placement section 26: Right side panel 26a: Insertion part 26b: Front end 26c: Rear end 26d: Placement section 27: Middle plate 28: Middle bottom plate 30: Heat insulation material 31: Front insulation material 32: Rear insulation material 33:Protrusion 35: Fixing bracket 35a: Rear plate fixing part 35b: Holding part 35c: Side plate fixing part 35d: difference end 35e:Protrusion 35f: Return part 40~45: Fastening members
Claims
1. A hot water storage and hot water supply device having a hot water storage tank covered with a heat insulating material and a box-shaped outer case that houses the hot water storage tank, The exterior case has a top plate, a bottom plate, a front plate, a rear plate, and left and right side plates, The left and right side plates each have a rear end portion bent toward the other and an opening portion passing through the rear end portion in the front-rear direction, The heat insulating material has a pair of left and right protruding portions protruding rearward, A fixing metal fitting having a protrusion extending rearward is attached to each of the protrusions, and vertical and horizontal movement of the fixing metal fitting is restricted. This hot water storage and heating device is characterized in that the left and right side panels are configured to be temporarily fixed to the hot water storage tank by placing the rear end portion on the protrusion portion of the corresponding fixing bracket while the protrusion portion is inserted into the opening from the front.
2. The temporarily fixed left and right side plates are fixed to the corresponding fixing metal fittings by fastening members, The hot water storage and heating device according to claim 1, wherein the rear plate is configured to be fixed by fastening members to the fixing metal fittings to which the left and right side plates are fixed.
3. the exterior case has a middle plate extending upward from the bottom plate, and a middle bottom plate extending forward from an upper end of the middle plate and to which a lower end of the front plate is fixed, 3. The hot water storage and heating apparatus according to claim 1, wherein the left and right side plates each have a mounting portion at a front end thereof for mounting on the middle bottom plate.
Citation Information
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