JP7156074B2 - Storage hot water heater - Google Patents

Description

The present invention relates to a storage hot water heater.

A conventional hot water storage type hot water heater disclosed in Patent Document 1 below includes a vacuum heat insulating member that covers at least a portion of a hot water storage tank, and an outer member that covers the entire area of the vacuum heat insulating member and is partially formed with a through hole. and a lid member for opening and closing the through hole. In this conventional hot water storage type hot water heater, two vacuum insulation members are arranged with an interval therebetween, and a temperature detection device is arranged on the wall surface of the hot water storage tank exposed at the interval. It has a width extending from one vacuum insulation member to the other vacuum insulation member beyond the temperature detection device.

Japanese Unexamined Patent Application Publication No. 2012-112606

Other parts are arranged adjacent to the outer surface of the tank heat insulating material covering the hot water storage tank, and an accessory part such as a temperature sensor may be attached to the hot water tank at a position covered by the other parts. Assuming that the technique of Patent Document 1 is applied in such a case, the workability is poor because it is necessary to remove the other parts when opening and closing the cover member.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and provides a hot water storage type hot water heater that is advantageous in terms of improving workability when performing maintenance on accessories attached to a hot water storage tank. The purpose is to

A hot water storage type water heater according to the present invention includes a hot water storage tank, a tank heat insulating material having an opening and covering the hot water storage tank, and an outer part arranged outside the tank heat insulating material so as to partially cover the opening. , an accessory part attached to the hot water storage tank at a position covered by the outer part and positioned inside the opening, and a lid member that closes the opening and is slidable between a closed position and an open position, the tank The heat insulating material has a guide portion that guides the movement of the lid member when the lid member slides, so that the lid member can be slid from the closed position to the open position without removing the outer part. The lid member can be removed from the tank insulation without removing the outer part, or the accessory part can be seen through the opening without removing the outer part.

Advantageous Effects of Invention According to the present invention, it is possible to provide a hot water storage type hot water heater that is advantageous in improving workability when performing maintenance on accessories attached to a hot water storage tank.

2 is an exploded perspective view of a hot water storage tank unit provided in the hot water storage type hot water heater according to Embodiment 1. FIG. FIG. 2 is a front view showing a state in which the hot water storage tank unit shown in FIG. 1 is assembled; FIG. 3 is a diagram showing a part of a cross-sectional side view taken along line AA in FIG. 2; FIG. 3 is a diagram showing a part of a cross-sectional side view taken along line AA in FIG. 2; FIG. 4 is a perspective view showing the front body heat insulating material around the opening with the lid member removed; 3 is an enlarged view of the periphery of the lid member in FIG. 2; FIG. 3 is a diagram showing a part of a cross-sectional plan view of the hot water storage tank unit provided in the hot water storage type hot water heater according to Embodiment 2, cut at a position corresponding to line BB in FIG. 2. FIG. 3 is a diagram showing a part of a cross-sectional side view of the hot water storage tank unit provided in the hot water storage type hot water heater according to Embodiment 2, cut at a position corresponding to line AA in FIG. 2. FIG.

Embodiments will be described below with reference to the drawings. Elements that are common or correspond to each figure are denoted by the same reference numerals, and overlapping descriptions are simplified or omitted.

Embodiment 1.
FIG. 1 is an exploded perspective view of a hot water tank unit 1 provided in a hot water storage type hot water heater according to Embodiment 1. FIG. FIG. 2 is a front view showing a state in which the hot water storage tank unit 1 shown in FIG. 1 is assembled. As shown in these figures, the hot water storage type hot water heater according to Embodiment 1 includes a hot water storage tank unit 1 . In the following description, as a general rule, the direction is specified with reference to the attitude of the hot water storage tank unit 1 installed on the horizontal plane as shown in FIG.

As shown in FIG. 1 , the hot water storage tank unit 1 includes a hot water storage tank 10 , a tank heat insulating material covering the hot water storage tank 10 , a lid member 21 , and a riser portion forming body 30 . In the present embodiment, a front body heat insulator 20 , an upper heat insulator 22 , a lower heat insulator 23 , and a rear body heat insulator 24 are provided as tank heat insulators covering the hot water storage tank 10 .

Hot water is stored in the hot water storage tank 10 by forming a temperature stratification in which the upper side has a higher temperature and the lower side has a lower temperature due to the difference in the specific gravity of the water depending on the temperature. For example, the hot water storage tank 10 can store low-temperature water supplied from a water source such as an external water supply on the lower layer side, and store high-temperature water heated by a heating means (not shown) on the upper layer side. The heating means may have any structure, and may be, for example, a heat pump unit that heats water using a refrigerating cycle, or an electric heater arranged in the hot water storage tank 10 .

The hot water tank 10 is made of metal such as stainless steel. The hot water storage tank 10 has a cylindrical tank body 10a, an upper end plate 10b, and a lower end plate 10c. The hot water storage tank unit 1 is installed in a posture in which the central axis of the hot water storage tank 10 is parallel to the vertical line. The upper end plate 10b is joined to the upper end of the tank body 10a so as to block the opening of the upper end. The lower end plate 10c is joined to the lower end of the tank body 10a so as to block the opening of the lower end. Each of the upper end plate 10b and the lower end plate 10c has a bowl-like shape.

Temperature sensors 11, 12, 13, 14, and 15 for detecting the water temperature in the hot water storage tank 10 are attached to the surface of the tank body 10a. In the illustrated example, five temperature sensors 11, 12, 13, 14, and 15 are arranged in this order from bottom to top, but the number of temperature sensors to be installed is not particularly limited.

Each of the front body heat insulating material 20, the upper heat insulating material 22, the lower heat insulating material 23, and the rear body heat insulating material 24 is made of expanded plastic such as expanded polystyrene or expanded polyurethane, and is molded into a predetermined shape. ing. The upper heat insulating material 22 covers an area including at least a portion of the upper end plate 10 b corresponding to the upper portion of the hot water storage tank 10 . A front body heat insulating material 20 and a rear body heat insulating material 24 cover the tank body 10a. The front body heat insulating material 20 covers about half of the front side of the tank body 10a. The rear body portion heat insulating material 24 covers approximately half the circumference of the rear side of the tank body portion 10a. The lower heat insulating material 23 covers an area including at least a portion of the lower end plate 10c corresponding to the lower portion of the hot water storage tank 10. As shown in FIG. In the present embodiment, the tank heat insulating material is roughly divided into the four heat insulating materials described above, but the number of divisions of the tank heat insulating material or the division positions are limited to the example shown in the figure. not a thing Further, as a heat insulating material covering the hot water storage tank 10, a material other than foamed plastic (for example, glass wool, vacuum heat insulating material, etc.) may be provided.

The front body heat insulating material 20 has an opening 20a. The opening 20a corresponds to a through-hole penetrating from the inner surface to the outer surface of the front body heat insulating material 20 . The lid member 21 is a member that can be attached to the front body heat insulating material 20 so as to close the opening 20a. The lid member 21 may be made of a heat-insulating material such as plastic foam. In this embodiment, the opening 20a has an elongated shape whose longitudinal direction is the vertical direction. In FIG. 2, the opening 20a is closed by the lid member 21. As shown in FIG. In FIG. 2, the lid member 21 has an elongated rectangular shape whose longitudinal direction is the vertical direction.

The hot water storage type hot water heater of the present embodiment includes an outer shell case forming the outer shell of the hot water storage tank unit 1 . The hot water storage tank 10 is housed inside the outer case while being covered with a tank heat insulating material. In FIGS. 1 and 2, illustration of portions of the outer case other than the riser portion forming member 30 and the bottom plate 31 is omitted. The outer case has, for example, a rectangular parallelepiped shape. The outer case is made of metal, for example. The riser forming body 30 forms the riser of the outer case. The riser forming body 30 is arranged at the lower portion of the front surface of the outer case. The riser portion forming body 30 has a plate-like vertical portion 30a perpendicular to the horizontal plane, and a protruding portion 30b horizontally protruding forward from the upper end portion of the vertical portion 30a.

The bottom plate 31 forms the bottom of the outer case. Although illustration is omitted, the outer case has a front portion forming a front surface above the riser portion forming body 30, a left side portion forming a left side surface, a right side portion forming a right side surface, and a rear surface forming a rear surface. and a top surface portion forming the top surface. A plurality of legs 9 are installed under the bottom plate 31 . These legs 9 support and fix the hot water storage tank unit 1 to the ground, floor surface, or the like. In the illustrated example, the lower ends of the legs 9 are fixed to the pedestal 100 .

Various functional parts such as pipes, pumps, valves, heat exchangers, sensors, etc. are further provided inside the outer shell case.

3 and 4 are diagrams showing part of a cross-sectional side view taken along line AA in FIG. 2. FIG. Lid member 21 in the present embodiment is slidable between a closed position that closes opening 20a and an open position. FIG. 3 shows the lid member 21 in the closed position. FIG. 4 shows the lid member 21 in the open position. In the present embodiment, lid member 21 is slidable along the axial direction of hot water storage tank 10, that is, the vertical direction. The lid member 21 moves to the open position by sliding upward from the closed position. As will be described later, the front body heat insulating material 20 has a guide portion that guides the movement of the lid member 21 when the lid member 21 slides.

As shown in FIGS. 3 and 4, the temperature sensors 11 and 12 are positioned inside the opening 20a. The opening 20 a corresponds to a maintenance hole for performing maintenance such as inspection or replacement of the temperature sensors 11 and 12 . During normal times other than maintenance, the opening 20a is closed with the cover member 21 as shown in FIG. As a result, it is possible to reliably prevent the heat of the hot water storage tank 10 from leaking to the outside through the opening 20a. The riser forming body 30 has a corner portion 30c between the upper end of the vertical portion 30a and the projecting portion 30b.

When the hot water storage tank unit 1 is viewed from the front, that is, when viewed from the left side to the right side in FIGS. 3 and 4, it is as follows. A lower part of the front body heat insulating material 20 is covered with a riser forming body 30 . A lower portion of the opening 20a is covered with a riser forming body 30. As shown in FIG. The temperature sensor 11 is positioned to be covered by the riser formation 30 . That is, the temperature sensor 11 is positioned lower than the corner portion 30 c of the riser forming body 30 . The temperature sensor 12 is at a position not covered by the riser formation 30 . That is, the temperature sensor 12 is positioned higher than the corner portion 30 c of the riser forming body 30 . The riser forming body 30 in the present embodiment corresponds to an outer part arranged outside the front body heat insulating material 20 so as to partially cover the opening 20a. Temperature sensor 11 in the present embodiment is attached to hot water storage tank 10 at a position covered by the outer component and corresponds to an accessory component located inside opening 20a. In the illustrated example, the temperature sensor 12 is also located inside the opening 20a, but the temperature sensor 12 does not have to be located inside the opening 20a. That is, the opening 20a may be formed in a range surrounding only the temperature sensor 11. As shown in FIG.

In the closed position shown in FIG. The lid member 21 is not in contact with the tank body 10a and the temperature sensors 11,12. The lower portion of the lid member 21 is inserted between the riser forming body 30 and the tank body 10a. The lower end 21a of the lid member 21 is in contact with the lower edge 20b of the opening 20a. The lower edge 20b has an upward facing surface. The front body heat insulating material 20 has a first restricting portion 20c. The first restricting portion 20c corresponds to the upper edge of the opening 20a and has a downward facing surface. The lid member 21 has a second restricting portion 21b. The second restricting portion 21b has an upper surface facing the first restricting portion 20c. The second restricting portion 21b is separated from the first restricting portion 20c. A gap 40 is formed between the first restricting portion 20c and the second restricting portion 21b.

The lid member 21 has a surface portion 21c and a back surface portion 21d. The back surface portion 21 d is a surface facing the hot water storage tank 10 . The surface portion 21c is the surface opposite to the back surface portion 21d. That is, the surface portion 21c is a surface facing the outer surface side of the hot water storage tank unit 1 . The lid member 21 has a projecting portion 21p projecting from the back surface portion 21d. Tm in FIG. 3 indicates the maximum thickness of the lid member 21 . In the present embodiment, the thickness of lid member 21 is maximized at the position of projecting portion 21p.

Sd in FIG. 3 indicates the shortest distance between the lid member 21 and the riser forming body 30 in the closed position. In the illustrated example, the shortest distance Sd corresponds to the distance of the gap formed between the surface portion 21c and the riser forming body 30 near the corner portion 30c. In this embodiment, the maximum thickness Tm of the lid member 21 is larger than the shortest distance Sd. This is advantageous for increasing the heat insulation of the lid member 21 .

If an attempt is made to open the lid member 21 by moving the lid member 21 in its thickness direction, i.e., leftward in FIG. 3 from the state shown in FIG. 30, the cover member 21 cannot be opened.

In the open position shown in FIG. 4: The second restricting portion 21b of the lid member 21 is in contact with the first restricting portion 20c of the front trunk heat insulating material 20 . The lower end 21 a of the lid member 21 is positioned at approximately the same height as the corner 30 c of the riser forming body 30 . Therefore, in the state of FIG. 4 , the lid member 21 can be removed from the front body heat insulating material 20 without the lower end 21 a of the lid member 21 coming into contact with the riser portion forming member 30 . When the lid member 21 is removed, the temperature sensors 11 and 12 exposed to the opening 20a can be visually confirmed, and maintenance of the temperature sensors 11 and 12 can be performed.

As described above, according to the present embodiment, the lid member 21 can be removed from the front body heat insulating material 20 without removing the riser portion forming member 30 . Therefore, when performing maintenance on the temperature sensor 11 hidden behind the riser forming body 30, it is not necessary to remove the riser forming body 30, so workability can be improved.

In the present embodiment, the amount of sliding of the lid member 21 is regulated by the contact of the second regulating portion 21b with the first regulating portion 20c at the open position. This makes it easy to adjust the amount of sliding of the lid member 21 when the lid member 21 is opened. As shown in FIG. 3, the lid member 21 has a projecting portion 21e that closes a gap 40 formed between the first restricting portion 20c and the second restricting portion 21b in the closed position. As a result, leakage of heat from the hot water storage tank 10 to the outside through the gap 40 can be reliably suppressed.

In the following description, the central axis of the hot water storage tank 10 is referred to as "tank central axis". Also, the distance between the center of the lid member 21 and the center axis of the tank is referred to as the "center-to-center distance". The center of the lid member 21 may be, for example, the position of the center of gravity of the lid member 21 . As shown in FIG. 3, the front body heat insulating material 20 has a sliding surface 20d. 20 d of sliding surfaces are formed in the position above the 1st control part 20c in the surface side of the front trunk|drum heat insulating material 20. As shown in FIG. The sliding surface 20d is inclined with respect to the tank central axis. The distance between the sliding surface 20d and the center axis of the tank increases upward. At the closed position, the tip of the projecting portion 21e of the lid member 21 is in contact with the sliding surface 20d.

The lid member 21 has an inclined surface 21f. 21 f of inclined surfaces are formed in the back surface side of the protrusion part 21e. The inclined surface 21f at the closed position is inclined with respect to the central axis of the tank. The distance between the inclined surface 21f and the tank central axis at the closed position increases as it goes upward. Also, the inclined surface 21f is parallel to the sliding surface 20d. When the lid member 21 is slid from the closed position to the open position, the tip of the projecting portion 21e and the inclined surface 21f slide against the sliding surface 20d, thereby increasing the distance between the centers of the lid member 21. Guided movement. As a result, the center-to-center distance at the open position is longer than the center-to-center distance at the closed position, and the following effects are obtained. Since the gap between the cover member 21 and the tank body 10a is widened when the cover member 21 is in the open position, when removing the cover member 21, the maintenance worker can remove the cover member without contacting the tank body 10a with the lower part of the cover member 21. 21 can be tilted more. As a result, the lid member 21 can be removed more easily.

An inclined surface 21k is formed on the lower portion of the surface portion 21c of the lid member 21 . The distance between the inclined surface 21k and the tank central axis at the closed position increases as it goes upward. The upper end of the inclined surface 21k at the closed position is positioned at substantially the same height as the corner portion 30c of the riser portion forming body 30. As shown in FIG. The inclined surface 21k is parallel to the inclined surface 21f. In the present embodiment, since the inclined surface 21k is provided, when the distance between the centers increases as the lid member 21 slides, the lower portion of the lid member 21 is positioned against the corner portion 30c of the riser portion forming body 30. Contact can be prevented more reliably.

The lid member 21 has finger hooks 21g, 21h, and 21i. The finger hooking portions 21g, 21h, and 21i have shapes that can be hooked with fingers when the cover member 21 is slid. The finger hooks 21g, 21h, and 21i are provided in areas of the surface portion 21c that are not covered by the riser portion forming body 30 in the closed position. In the present embodiment, provision of the finger hooks 21g, 21h, and 21i makes it easier for the maintenance worker to slide the cover member 21. FIG. In the illustrated example, the concave portions formed in the surface portion 21c constitute the finger hook portions 21g, 21h, and 21i, but convex portions may be used instead of the concave portions. Also, the number of finger hooks is not limited to three as shown in the figure, and at least one is sufficient.

FIG. 5 is a perspective view showing the front body heat insulating material 20 around the opening 20a with the lid member 21 removed. As shown in FIG. 5, the front body heat insulating material 20 has guide portions 20e and 20f that guide the movement of the lid member 21 when the lid member 21 slides. The guide portions 20e and 20f have an elongated shape extending along the axial direction of the hot water storage tank 10. As shown in FIG. The lid member 21 slides while being in contact with the guide portions 20e and 20f. As shown in FIG. 1 , the lid member 21 has two side edges 21j extending along the axial direction of the hot water storage tank 10 . The guide portion 20e contacts the side edge 21j. The guide portion 20f is in contact with the back surface portion 21d adjacent to the side edge 21j. Each of the guide portions 20e and 20f is formed at two locations corresponding to the two side edges 21j. The guide portion 20e can regulate the position of the lid member 21 in the circumferential direction of the tank body portion 10a. The guide portion 20f can regulate the position of the lid member 21 in the radial direction of the tank body portion 10a.

At least a partial region in the longitudinal direction of the guide portion 20f corresponds to a sliding surface that is inclined with respect to the central axis of the tank. The distance between the sliding surface and the tank central axis increases upward. Thereby, the movement of the lid member 21 can be guided such that the center-to-center distance increases when the lid member 21 is slid from the closed position to the open position.

As shown in FIG. 5, a convex portion 20g is formed at an intermediate position in the longitudinal direction of the guide portion 20e. At the position where the convex portion 20g is formed, the interval between the two guide portions 20e is narrower than at other portions. At the open position, the lower end 21a of the lid member 21 is positioned above the convex portion 20g, and the lid member 21 is not sandwiched between the convex portions 20g. On the other hand, in the closed position, the lower end 21a of the lid member 21 is positioned below the projection 20g, and the lid member 21 is sandwiched between the projections 20g. As a result, the frictional force between the lid member 21 and the guide portion 20e increases, and the frictional force can hold the lid member 21 in the closed position. Therefore, there is an advantage that the maintenance worker does not need to fix the lid member 21 with, for example, an adhesive tape after closing the opening 20a with the lid member 21 .

The convex portion 20g described above corresponds to a frictional force increasing portion that holds the lid member 21 in the closed position by frictional force. The structure of the frictional force increasing portion is not limited to the illustrated example. For example, a structure in which the distance between the two guide portions 20e gradually decreases downward may be provided as the frictional force increasing portion. Further, a structure in which a convex portion formed on the lid member 21 and a concave portion formed in the middle of the longitudinal direction of the guide portion 20e are fitted may be provided as the frictional force increasing portion. The frictional force increasing portion may be formed on at least one of the front trunk heat insulating material 20 and the lid member 21 .

FIG. 6 is an enlarged view of the periphery of the lid member 21 in FIG. As shown in FIG. 6, the lid member 21 has a display portion 21m that displays the direction in which the lid member 21 is slid from the closed position to the open position. The display portion 21m is provided in a region of the surface portion 21c of the lid member 21 that is not covered with the riser portion forming member 30 in the closed position. In the illustrated example, a display section 21m is provided above the finger hook sections 21g, 21h, and 21i. The display unit 21m displays an arrow pointing upward. In the present embodiment, by providing the display portion 21m, it is possible to easily suggest to the maintenance worker the direction in which the lid member 21 should be slid when opening the lid member 21 . In addition, in FIG.1 and FIG.2, illustration of the display part 21m is abbreviate|omitted.

Embodiment 2.
Next, the second embodiment will be described with reference to FIGS. 7 and 8. The description will focus on the differences from the first embodiment described above. The same reference numerals are used to simplify or omit redundant description. FIG. 7 is a diagram showing part of a cross-sectional plan view of the hot water storage tank unit 1 provided in the hot water storage type hot water heater according to Embodiment 2, cut at a position corresponding to line BB in FIG. FIG. 7 shows the lid member 21 in the closed position. FIG. 7 corresponds to a view cut along a plane perpendicular to the central axis of the tank. FIG. 8 is a diagram showing a part of a cross-sectional side view of the hot water storage tank unit 1 included in the hot water storage type hot water heater according to Embodiment 2, taken along line AA in FIG. FIG. 8 shows the lid member 21 in the open position.

In this embodiment, the lid member 21 is horizontally slidable along the tangential direction of the tank body 10a in FIG. The lid member 21 moves to the open position by sliding leftward in FIG. 7 from the closed position. The tangential direction of the lid member 21 is, for example, a direction parallel to the tangent line at one point on the surface of the tank body 10a that faces the lid member 21 between the closed position and the open position.

The front body heat insulating material 20 has a first restricting portion 20h. The first restricting portion 20h has a surface facing right in FIG. The lid member 21 has a second restricting portion 21n. The second restricting portion 21n has a surface facing left in FIG. 7 so as to face the first restricting portion 20h. At the closed position, the second restricting portion 21n is separated from the first restricting portion 20h, and a gap 50 is formed between the first restricting portion 20h and the second restricting portion 21n. The lid member 21 can slide leftward in FIG. 7 to a position where the second restricting portion 21n contacts the first restricting portion 20h. The position of the lid member 21 in which the second restricting portion 21n contacts the first restricting portion 20h corresponds to the open position. At the open position, the sliding amount of the lid member 21 is regulated by the contact of the second regulating portion 21n with the first regulating portion 20h. This makes it easy to adjust the amount of sliding of the lid member 21 when the lid member 21 is opened.

At the open position, the lid member 21 does not cover the opening 20a, so the temperature sensors 11 and 12 exposed to the opening 20a can be visually checked, and maintenance of the temperature sensors 11 and 12 can be performed. can. As described above, according to the present embodiment, the lid member 21 can be set to the open position without removing the riser portion forming body 30, and the temperature sensor 11 can be visually observed from the opening portion 20a. Therefore, when performing maintenance on the temperature sensor 11 hidden behind the riser forming body 30, it is not necessary to remove the riser forming body 30, so workability can be improved. Furthermore, in the present embodiment, the lid member 21 can slide along the tangential direction of the tank body portion 10a, so that the temperature sensor 11 can be opened without removing the lid member 21 from the front body heat insulating material 20. It becomes visible from the part 20a. Therefore, workability can be further improved.

The front trunk heat insulating material 20 has a guide portion 20i that guides the movement of the lid member 21 when the lid member 21 slides. The guide portion 20i has a surface facing the front of the hot water storage tank unit 1 and extends to the left side of the opening 20a in FIG. The lid member 21 slides while the projecting portion 21p projecting from the back surface portion 21d is in contact with the guide portion 20i.

A parallel line PL in FIG. 7 is an imaginary line drawn parallel to the vertical portion 30 a of the riser forming body 30 . The surface of the guide portion 20i is inclined with respect to the parallel line PL. The distance between the surface of the guide portion 20i and the inner surface of the vertical portion 30a decreases toward the left in FIG. Therefore, when the lid member 21 moves from the closed position to the open position, the distance between the lower portion of the surface portion 21c of the lid member 21 and the inner surface of the vertical portion 30a is reduced, and as shown in FIG. The lower portion of the portion 21c is pressed against the inner surface of the vertical portion 30a. As a result, the lid member 21 can be held in the open position by the frictional force between the lid member 21 and the vertical portion 30a. Therefore, the position of the lid member 21 can be more reliably maintained at the open position during maintenance work.

Although the embodiment has been described above, a modified example may be configured as follows. Although an example in which the opening 20a is formed in the front body heat insulating material 20 has been described, the opening may be formed in a tank heat insulating material other than the front body heat insulating material 20, or may be formed in two tank heat insulating materials. An opening may be formed across the boundary. In addition, although an example in which the riser forming body 30 corresponds to the outer part has been described, the outer part may be any part that is arranged adjacent to the outer surface of the tank heat insulating material. It may be an exchanger or the like. Also, although an example in which the temperature sensor 11 corresponds to an accessory has been described, the accessory may be, for example, a water quality sensor that detects the water quality in the hot water storage tank 10, or a foreign matter that detects foreign matter such as scale accumulated in the hot water storage tank 10. A sensor, a window for observing the inside of the hot water tank 10, or the like may be used.

Also, two or more of the above-described embodiments that can be combined may be combined and implemented.

1 hot water storage tank unit 9 legs 10 hot water storage tank 10a tank body 10b upper end plate 10c lower end plate 11, 12, 13, 14, 15 temperature sensor 20 front body heat insulating material 20a opening 20b bottom Edge portion 20c First restriction portion 20d Sliding surface 20e, 20f Guide portion 20g Convex portion 20h First restriction portion 20i Guide portion 21 Lid member 21a Lower end 21b Second restriction portion 21c Surface portion , 21d rear surface portion 21e protruding portion 21f inclined surface 21g, 21h, 21i finger hook portion 21j side edge portion 21k inclined surface 21m display portion 21n second restricting portion 21p protruding portion 22 upper heat insulating material 23 Lower heat insulating material 24 Rear body heat insulating material 30 Riser forming body 30a Vertical portion 30b Protruding portion 30c Corner portion 31 Bottom plate 40 Gap 50 Gap 100 Pedestal

Claims (9)

a water storage tank;
A tank heat insulating material having an opening and covering the hot water storage tank;
an outer component disposed outside the tank insulation so as to cover a portion of the opening;
an accessory part attached to the hot water storage tank at a position covered by the outer part and located inside the opening;
a lid member slidable between a closed position that closes the opening and an open position;
with
The tank heat insulating material has a guide portion that guides the movement of the lid member when the lid member slides,
the lid member is slidable from the closed position to the open position without removing the outer component;
In the open position, the lid member can be removed from the tank insulating material without removing the outer part, or the attached part can be visually observed from the opening without removing the outer part. machine. 2. The hot water storage type water heater according to claim 1, wherein said outer component is a riser forming member forming a riser of an outer shell housing said hot water storage tank. 3. The hot water storage type water heater according to claim 1, wherein the lid member is slidable along the direction of the central axis of the hot water storage tank. 3. The hot water storage type water heater according to claim 1, wherein the lid member is slidable along a tangential direction of the body of the hot water storage tank. The center-to-center distance is the distance between the center of the lid member and the central axis of the hot water storage tank,
5. The guide portion has a sliding surface that guides movement of the lid member so that the center-to-center distance at the open position is longer than the center-to - center distance at the closed position. The hot water storage type hot water heater according to 1. The lid member has a back surface portion facing the hot water storage tank and a front surface portion opposite to the back surface portion,
6. The surface portion according to any one of claims 1 to 5 , wherein a finger hooking portion on which a finger can be hooked when sliding the lid member is provided in a region of the surface portion that is not covered by the outer component in the closed position. The hot water storage type hot water heater according to 1. The lid member has a back surface portion facing the hot water storage tank and a front surface portion opposite to the back surface portion,
7. The display part according to any one of claims 1 to 6 , wherein a display part for displaying a direction in which the lid member is slid is provided in a region of the surface part that is not covered by the outer component in the closed position. A storage-type water heater described. The tank heat insulating material has a first restricting portion,
The lid member has a second restricting portion,
The second restricting portion is separated from the first restricting portion at the closed position,
The slide amount of the lid member is regulated by the contact of the second regulating portion with the first regulating portion at the open position,
The hot water storage according to any one of claims 1 to 7 , wherein the lid member has a projecting portion that closes a gap formed between the first restricting portion and the second restricting portion in the closed position. water heater. 9. The tank according to any one of claims 1 to 8 , wherein at least one of the tank heat insulating material and the lid member is formed with a frictional force increasing portion that holds the lid member in the closed position by a frictional force. Storage hot water heater.

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