Storage water heater

Abstract

To provide a storage water heater capable of preventing rain water from entering into an exterior case.SOLUTION: A storage water heater (1) includes a hot water storage tank (2) that stores hot water and a box-shaped exterior case (20) that accommodates the hot water storage tank (2). The exterior case (20) includes an opening part (34) formed on a part of the exterior case (20) and a lid (35) that covers the opening part (34). A convex bead part (36) projecting to the outer side of the exterior case (20) is provided in the vicinity of the upper side of the opening part (34). The bead part (36) extends to the outer side in the width direction of the opening part (34).SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a hot water storage and heating device, and more particularly to a device for preventing rainwater from entering the interior of an exterior case that houses a hot water storage tank. [Background technology]

[0002] Hot water storage and heating systems, which are often installed outdoors, are typically protected by an exterior case to prevent rainwater from splashing on the internal sensors and control devices. The exterior case is roughly rectangular and houses the hot water storage tank, piping, valves, pumps, sensors, and control devices. A piping space is provided at the bottom of one side of the exterior case for connecting piping introduced from outside.

[0003] The connection port mounting plate in the piping space is fitted with a number of joints that connect the internal piping within the case to the external piping, and is also formed with an opening for maintenance. The opening is covered with a lid, both ends of which are fixed to the connection port mounting plate with screws.

[0004] In Patent Document 1, a space is provided at the bottom front of the exterior case for connecting multiple internal pipes inside the case to multiple external pipes, and a stepped recess is provided behind this space. A drain plug operation window is opened in the stepped recess, and a window cover that covers the drain plug operation window is removably attached, so that the window cover can be removed and attached while the pipes are connected to operate the drain plug stored inside the tank. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4030406 Summary of the Invention [Problem to be solved by the invention]

[0006] In Patent Document 1, if wind and rain fall on the outer case and rainwater flows down into the recessed area of ​​the step, rainwater may enter the inside of the case through the gap between the drain plug operation window and the window cover, causing water to adhere to sensors and control equipment, resulting in malfunction. An object of the present invention is to provide a hot water storage and heating device that can prevent rainwater from entering the inside of an exterior case that houses a hot water storage tank.

[0007] The hot water storage and heating device of claim 1 is a hot water storage and heating device having a hot water storage tank for storing hot water and a box-shaped outer case that houses the hot water storage tank, wherein the outer case has an opening formed in a part of the outer case and a lid that covers the opening, and near the upper side of the opening has a convex bead portion that protrudes outside the outer case, and the bead portion extends to the outside of the width direction of the opening.

[0008] According to the above configuration, when wind and rain fall on the outer case and rainwater flows up to the upper part of the opening, the bead portion with a convex cross-section blocks the rainwater from flowing down toward the opening and causes it to flow outward in the width direction of the opening, thereby preventing rainwater from flowing into the case from the opening.

[0009] The hot water storage and heating device of claim 2 is characterized in that, in the invention of claim 1, the bead portion is formed in a downward sloping shape that transitions downward as it transitions from the portion corresponding to the center of the opening to the outside in the width direction of the opening. According to the above configuration, rainwater blocked by the slope of the bead portion is guided to flow downward toward the outside of the opening in the width direction, thereby reliably preventing rainwater from entering the case through the opening.

[0010] The hot water storage and heating device of claim 3 is characterized in that, in the invention of claim 1 or 2, a bent portion with an L-shaped cross section is formed which extends from the upper end of the lid toward the inside of the outer case and then rises upward, and the bent portion is fixed in a state inserted inside the outer case. According to the above configuration, if rainwater enters through the gap between the upper end of the lid and the opening, the bent portion blocks the water from entering the inside of the case and pushes it back out to the outside of the case, thereby preventing rainwater from entering the inside of the case.

[0011] The hot water storage and heating device of claim 4 is characterized in that, in the invention of claim 1 or 2, the lid has a lid bead portion formed to overlap the bead portion from the outside, and is fixed to the outer case in a state where the lid bead portion is overlapped on the bead portion. According to the above configuration, the lid bead portion blocks rainwater from flowing down toward the opening, thereby preventing rainwater from entering the inside of the case through the opening. Furthermore, if rainwater seeps into the gap between the lid and the outer case, the rainwater is guided to flow out of the opening through the gap created when the bead portion and the lid bead portion are overlapped, thereby preventing the rainwater from entering the inside of the case. [Effects of the Invention]

[0012] The above-mentioned various actions and effects can be obtained. [Brief explanation of the drawings]

[0013] [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. [Figure 3] FIG. 2 is an enlarged perspective view of the lower part of the outer case. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. 10 is a vertical cross-sectional view showing the state in which the upper end of the lid is fixed to the opening. [Figure 7] FIG. 10 is an enlarged perspective view of the lower part of the outer case of a modified embodiment. [Figure 8] FIG. 2 is an enlarged perspective view of the lid and the lid bead portion. [Figure 9]FIG. 10 is a vertical cross-sectional view of the state in which the lid bead portion is overlapped with the bead portion. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, the mode for carrying out the present invention will be described based on examples. [Example]

[0015] 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.

[0016] 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.

[0017] 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.

[0018] Next, a description will be given of the exterior case 20. Note that reference character F in Fig. 2 indicates the front, character L indicates the left, and character U indicates the upper side. As shown in Figure 2, the outer case 20 is formed in the shape of an approximately rectangular box and has a top panel 21, a right side panel 22, a left side panel 23, a front panel 24, and a rear panel (not shown), and covers the hot water storage unit 3 to protect it from wind, rain, etc.

[0019] As shown in Figure 3, the exterior case 20 includes a tank housing section 26 that houses the hot water storage tank 2, and an auxiliary equipment housing section 27 that is arranged adjacent to the front side of the tank housing section 26 and houses piping for various passages 6, 7, and 9, valves such as a mixing valve 8 and a hot water tap 10, pumps, various sensors 6a, 7a, 7b, and 7c, and a control section 11.

[0020] A cylindrical hot water storage tank 2 is housed in the tank housing portion 26 with its axis oriented vertically. The hot water storage tank 2 is covered with a heat insulating material (not shown) made of, for example, foamed resin, which has an outer shape that is approximately rectangular.

[0021] A piping space 29 for connecting piping introduced from outside is provided below the auxiliary equipment housing 27. The piping space 29 is a space that can accommodate external piping and is surrounded by the right side panel 22, the left side panel 23, a connection port mounting plate 30 on the top surface, and a connection port mounting plate 31 on the rear surface.

[0022] A plurality of joints 32, 33 are attached to the connection port mounting plates 30, 31, respectively connecting a plurality of internal pipes in the case to a plurality of external pipes, and pipes inside the case such as the hot water supply passage 8, the hot water return passage 9, the water supply passage 11, and the hot water outlet passage 12 are connected to external pipes via these multiple joints 32, 33. After connection to the external pipes, a decorative cover (not shown) is attached to cover the pipe space portion 29.

[0023] An opening 34 for performing maintenance on the pipes, valves, pumps, and control devices inside the case is formed in the connection port mounting plate 31. The front side of the opening 34 is covered with a lid 35, and both left and right ends of the upper end of the lid 35 are detachably fixed to the connection port mounting plate 31 with screws 50 (see FIG. 6).

[0024] As shown in Figures 3 and 4, near the upper side of the opening 34 of the connection port mounting plate 31, there is provided a bead portion 36 with a convex cross-section that protrudes forward, and which blocks rainwater from flowing downward toward the opening 34 and changes the direction of the flow.

[0025] The bead portion 36 is formed in a mountain shape (L-shape) when viewed from the front, which guides the blocked rainwater to flow outward in the width direction of the opening 34, and a gently sloping protrusion extends from the upper vicinity of the opening 34 corresponding to the center of the opening 34 in the left-right direction (width direction of the opening 34) to the outer side in the width direction of the opening 34, gradually downward as it moves outward in the width direction of the opening 34.

[0026] 5, the lid 35 is sized to cover the opening 34 and is generally rectangular in front view. A bent portion 37 with an L-shaped cross section that extends toward the inside of the case is integrally formed at the upper end of the lid 35. The left-to-right length of the bent portion 37 is shorter than the left-to-right width of the opening 34, and the bent portion 37 can be inserted into the inside of the case from the upper end of the opening 34.

[0027] 6, the bent portion 37 has a horizontal plate portion 38 that extends horizontally from the upper end of the lid 35 toward the inside of the case, and a vertical plate portion 39 that rises vertically upward from the outer edge of the horizontal plate portion 38. When the lid 35 is fixed to the connection port mounting plate 31 and covers the opening 34, the horizontal plate portion 38 is inserted into the interior of the case (inside the auxiliary equipment accommodating portion 27) from the upper end of the opening 34, and the vertical plate portion 39 is positioned above the upper end of the opening 34.

[0028] The effects of the hot water storage and heating apparatus 1 described above will now be described. When wind and rain fall on the exterior case 20, if rainwater flows up to the vicinity of the upper side of the opening 34 of the connection port mounting plate 31 of the piping space section 29, the bead section 36 having a convex cross section blocks the rainwater from flowing down in the direction of the opening 34, thereby preventing the rainwater from flowing into the case from the opening 34.

[0029] Furthermore, the bead portion 36 is formed in a downward slope that gradually decreases from the portion corresponding to the center of the opening 34 toward the outside in the width direction of the opening 34. Therefore, the slope of the bead portion 36 guides the blocked rainwater to flow downward toward the outside in the width direction of the opening 34, thereby reliably preventing rainwater from entering the inside of the case through the opening 34.

[0030] At the upper end of lid 35, a bent portion 37 with an L-shaped cross section is formed, which has a horizontal plate portion 38 extending toward the inside of outer case 20 and a vertical plate portion 39 rising upward from horizontal plate portion 38, and said bent portion 37 is fixed in a state inserted inside outer case 20. Therefore, if rainwater seeps in through the gap between lid 35 and opening 34, the vertical plate portion 39 blocks and pushes back the water from entering the inside of the case, and the horizontal plate portion 38 guides the water to the outside of the case, thereby preventing rainwater from entering the inside of the case.

[0031] Next, a modified embodiment in which various changes are made to the above embodiment will be described, but the same reference numerals will be used to designate the same parts as those in the above embodiment, and the description thereof will be omitted as appropriate.

[0032] As shown in FIG. 7, a bead portion 40 having a convex cross section that protrudes forward is provided in the vicinity of the upper side of the opening 31 of the connection port mounting plate 31 in the piping space portion 29. The bead portion 40 is formed by a gently sloping protrusion that extends from the upper vicinity of the opening 34 corresponding to the center of the opening 34 in the left-right direction (width direction of the opening 34) to the outside of the opening 34 in the width direction, and then bends vertically downward.

[0033] 8 and 9, the lid 41 is formed in a generally rectangular shape when viewed from the front, and is large enough to cover the opening 34 and the bead portion 40. The front sides of the opening 34 and the bead portion 40 are covered with the lid 41, and both left and right end portions of the upper end of the lid 41 are detachably fixed to the connection port mounting plate 31 with screws 51.

[0034] The upper end portion of the lid 41 is provided with a lid bead portion 42 that protrudes forward and has a convex cross section to block rainwater from flowing down in the direction of the opening 34. The lid bead portion 42 is formed as a protrusion of a size that allows it to be overlapped and cover the bead portion 40 from the outside when the lid 41 is fixed to the connection port mounting plate 31.

[0035] The lid bead portion 42 is formed at the portion corresponding to the bead portion 40 at the upper end of the lid 41, with a gently sloping protrusion that extends downward as it moves from the center to the outside of the opening 34 in the width direction, and then bends vertically downward.

[0036] 9, when the lid 41 is fixed to the connection port mounting plate 31 with the lid bead portion 42 overlapping the bead portion 40, a rainwater guide passage 43 is formed by the gap created when the lid bead portion 42 overlaps the bead portion 40. This rainwater guide passage 43 is formed as a gently downward sloping passage that follows the shapes of the lid bead portion 42 and the bead portion 40 and extends outward in the width direction of the opening 34, then bends vertically downward.

[0037] The effects of the hot water storage and heating apparatus 1 of the modified embodiment explained above will be described. When wind and rain fall on the exterior case 20, the lid bead part 42 blocks the rainwater from flowing down toward the opening 34 when the rainwater reaches the upper end part of the lid 41, and the blocked rainwater is guided to flow down toward the outside of the exterior case 20, so that the rainwater can be prevented from entering the inside of the case through the opening 34.

[0038] Furthermore, if rainwater enters the gap between the upper end of the lid 41 and the connection port mounting plate 31, the rainwater guide passage 43 guides the water to flow outward in the width direction of the opening 43, thereby preventing the rainwater from entering the inside of the case.

[0039] 1) The modified bead portion 40 and the cap bead portion 40 may be formed in a mountain shape. 2) The bead portions 36, 40 and the cover bead portion 42 in the embodiment and modified forms may be formed in a curved shape or inclined in one direction, as long as they can be guided outward in the width direction of the opening 34.

[0040] 3) The opening 34 of the embodiment may be formed in any one of the front panel 21, right panel 22, left panel 23, and rear panel 24 of the exterior case 20. The lid, bead portion, and lid bead portion are provided in the same shapes as the lids 35, 41, bead portions 36, 40, and lid bead portion 40 of the embodiment and modified forms.

[0041] In addition, those skilled in the art will be able to implement the present invention in various forms by adding various modifications to the above-described embodiments without departing from the spirit of the present invention. [Explanation of symbols]

[0042] 1. Hot water storage unit 2 Hot water tank 20 outer case 34 Opening 35, 41 lid 36, 40 Bead section 37 Bend part 42 Lid bead

Claims

1. A hot water storage and hot water supply device having a hot water storage tank for storing hot water and a box-shaped outer case for accommodating the hot water storage tank, the outer case has an opening formed in a part of the outer case and a lid that covers the opening, a convex bead portion protruding outward from the outer case near the upper side of the opening, A hot water storage and heating device characterized in that the bead portion extends to the outside in the width direction of the opening.

2. The hot water storage and heating device according to claim 1, characterized in that the bead portion is formed in a downward slope that slopes downward from a portion corresponding to the center of the opening toward the outside in the width direction of the opening.

3. A hot water storage and heating device as described in claim 1 or 2, characterized in that a bent portion with an L-shaped cross section is formed, extending from the upper end of the lid toward the inside of the outer case and then rising upward, and the bent portion is fixed in a state inserted inside the outer case.

4. The hot water storage and heating device described in claim 1 or 2, characterized in that the lid has a lid bead portion formed to overlap the bead portion from the outside, and the lid bead portion is fixed to the outer case in a state where it is overlapped on the bead portion.

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