JP5759258B2 - Hot water storage tank unit - Google Patents

Description

  Embodiments described herein relate generally to a hot water storage tank unit such as a heat pump water heater or an electric water heater.

  In general, an electric water heater heats the stored water in a hot water tank to a required temperature by energizing and heating an electric heater disposed in the hot water tank, for example, with cheap electricity at night discount, and the hot water is stored in the hot water tank To store hot water.

  In addition, a heat pump water heater that uses a heat pump (refrigeration cycle) instead of an electric heater drives the refrigeration cycle to heat the stored water in the hot water storage tank to a required temperature by using, for example, cheap electricity at night discount, In the hot water storage tank.

  Since this heat pump water heater heats the stored water by the refrigeration cycle, it is more energy efficient than heating by an electric heater, and it is possible to secure a coefficient of performance (COP) of three times or more for electric input, reducing running costs. Can be achieved.

  In this type of conventional hot water storage tank, three support legs are provided on the bottom surface of a cylindrical tank, and the support legs are fixed to an installation surface made of concrete or the like with an anchor bolt or the like (Patent Document 1). reference).

JP 2009-63277 A

  However, in the hot water storage tank described in Patent Document 1, since there are three support legs, any one side of a triangle formed by connecting the three support legs when self-supporting during handling or installation. When tilted by receiving a displacement load in the direction, the hot water storage tank is heavy (for example, 500 to 700 kg when full), and may fall over.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a hot water storage tank unit that can prevent overturning.

The hot water storage tank unit of the present embodiment is a hot water storage tank unit that includes a housing and a hot water storage tank that is stored in the housing and stores hot water. One end of the hot water storage tank unit is fixed to the hot water storage tank, and the other end is lower than the lower surface of the housing. It has three main legs that protrude downward. An insertion hole for inserting the screw shaft portion of the anchor bolt is provided at the bottom of the three main legs.

  And an auxiliary leg that is formed to have a length that protrudes downward from the lower surface of the housing to be smaller than a protruding length of the main leg, and is located outside the triangle formed by connecting the three main legs. Yes.

The bottom view of the hot water storage tank unit which concerns on 1st Embodiment. The front view of the hot water storage tank unit. The elevation view when the bottom face side of the hot water storage tank unit is looked up. The side view of the hot water storage tank unit. The V section enlarged view of FIG. The exploded perspective view of the hot water storage tank unit. The perspective view of the main leg arrange | positioned in the hot water storage tank, an auxiliary leg, and the baseplate of a housing | casing. The bottom view of the hot water storage tank unit which concerns on 2nd Embodiment. The principal part enlarged view of the main leg and auxiliary leg of the hot water storage tank unit which concerns on 3rd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or an equivalent part in several drawing.

(First embodiment)
1 is a bottom view of the hot water storage tank unit according to the first embodiment, FIG. 2 is a front view of the hot water storage tank unit, FIG. 3 is a top view when the bottom surface side of the hot water storage tank unit is looked up, and FIG. 5 is a side view of the hot water storage tank unit, FIG. 5 is an enlarged view of a portion V in FIG. 4, and FIG. 6 is an exploded perspective view of the hot water storage tank unit. The hot water storage tank unit 1 is used, for example, in a heat pump water heater. As shown in these drawings, the hot water storage tank unit 1 is accommodated in, for example, a sheet metal rectangular tube-shaped housing 2 and the housing 2. And a cylindrical hot water storage tank 3 made of metal such as stainless steel.

  As shown in FIG. 6, the housing 2 includes a front plate 2a made of sheet metal, a pair of left and right side plates 2b and 2c, a back plate 2d, a top plate 2e, and a bottom plate 2f. Further, the front plate 2a is divided into an upper front plate 2a1 and a lower front plate 2a2. In FIG. 6, the pair of left and right side plates 2b and 2c form attachment allowances P that are bent substantially inwardly at the upper end and both left and right ends. Similarly, required mounting allowances R are formed on the outer edges of the front and back sides of the top plate 2e, and screw holes for screwing a plurality of mounting screws (not shown) are formed in these mounting allowances P and R, respectively. ing.

  On the other hand, as shown in FIG. 6, the bottom plate 2f is formed with a rectangular annular side wall 2f1 that rises slightly upward in the figure on each side of the outer peripheral edge of the rectangle. The lower front plate 2a2, the pair of side plates 2b and 2c, and the back plate 2d are placed in a square tube shape, and the mounting screws are screwed into the plurality of screw holes of the mounting allowances P of the pair of side plates 2b and 2c, respectively. Thus, first, it is assembled into a rectangular tube shape with an upper end opening. Thereafter, the upper front plate 2a1 is placed on the upper end of the lower front plate 2a2, and the left and right side surfaces of the upper front plate 2a1 are brought into close contact with the upper side surface of the mounting margin P of the pair of left and right side plates 2b and 2c. Mounting screws are screwed into the plurality of screw holes of the mounting allowance P and assembled. The top plate 2e is placed on the upper surface opening end thus formed in a rectangular tube shape, and mounting screws are respectively screwed into the plurality of screw holes of the mounting allowance R of the top plate 2e, and a rectangular tube shape with a lid and a bottom is provided. A housing 2 is formed.

  The hot water storage tank 3 is supplied with water such as tap water, and the water in the hot water storage tank 3 is heated by a heat pump unit (not shown) provided separately from the hot water storage tank unit 1. Hot water heated by the heat pump unit is stored in the hot water storage tank 3. The hot water storage tank 3 is provided with a wiring such as a power supply line for supplying power to the waterway component 4, the electrical component box 5, the control valve and the like on the outer surface on the front side facing the inner surface of the front plate 2a.

  The water channel component 4 includes, for example, a water supply pipe for supplying tap water into the hot water storage tank 3 and a hot water supply pipe for supplying hot water in the hot water storage tank 3 to a water supply terminal (not shown). The electrical component box 5 includes electrical components such as a control device and an operation panel (not shown) that control energization.

  Thus, since the water channel component 4 and the electrical component box 5 are disposed on the front side of the hot water storage tank 3, it is heavier than the left and right side surfaces other than the front side and the back side.

  As shown in FIG. 7, the hot water storage tank 3 is formed on the lower outer surface thereof at the upper end in the figure, which is one end of the three main legs 6, 7, and 8, and one end of the three auxiliary legs 9, 10, 11. The upper end in a certain figure is fixed by attachment members 12, 12,.

  The main legs 6, 7, and 8 are formed so as to overlap with the upper main legs 6a, 7a, and 8a formed of, for example, a steel having an L-shaped cross section, and the upper main legs 6a, 7a, and 8a in the vertical direction. It has a lower main leg 6b, 7b, 8b which is U-shaped and has one side opening. Each lower main leg 6b, 7b, 8b is opened toward the front side.

  That is, each upper main leg 6a, 7a, 8a has one end (the upper end in FIG. 7) fixed to the lower outer peripheral surface of the hot water storage tank 3 by the mounting members 12, 12, 12.

  Each upper main leg 6a, 7a, 8a has, for example, a rectangular flat plate-like mounting flange 13, 13, 13 fixed to the lower end in the figure by welding or the like. Each mounting flange 13, 13, 13 forms a screw hole that is screw-coupled to a plurality of mounting screws (not shown), and is placed on the inner bottom surface (upper surface in FIG. 7) of the bottom plate 2f.

  Each lower main leg 6b, 7b, 8b is formed with a plurality of insertion holes through which the shaft portion of the mounting screw is inserted on the upper surface, and the bottom plate 2f is also provided with insertion holes at positions corresponding to these insertion holes. Each is formed.

  That is, the shaft portion of the mounting screw is inserted into the insertion hole on the upper surface from the lower side of the upper surface of each lower main leg 6b, 7b, 8b, and further, the screw of the mounting flange 13 is inserted through each insertion hole of the bottom plate 2f. The lower main legs 6b, 7b, 8b are integrally fixed to the upper main legs 6a, 7a, 8a by being screwed into the holes. Fixed legs 14 are disposed on the bottom surfaces of the lower main legs 6b, 7b, 8b, respectively. Each fixed leg 14 is formed with an insertion hole through which a screw shaft portion of an anchor bolt embedded in, for example, a concrete installation surface is inserted, and a fastening nut is fastened to the screw shaft portion of the anchor bolt. , Fixed to the installation surface and installed.

  Similarly to the main legs 6, 7, and 8, the auxiliary legs 9, 10, and 11 are made of L-shaped steel on the upper side of the bottom plate 2f in the drawing, and have the upper auxiliary legs 9a, 10a, and 11a having the mounting flanges 13, respectively. The lower auxiliary legs 9b, 10b, and 11b having a U-shaped cross section on the lower side in the drawing and having one side opened on the side, and are integrally and concentrically fixed by a mounting screw (not shown). Yes.

  FIG. 1 is a bottom view of the hot water tank unit 1 showing the positional relationship between the three main legs 6, 7, 8 and the three auxiliary legs 9, 10, 11.

  As shown in FIG. 1, the three main legs 6, 7, and 8 form a triangle t when the centers oa, ob, and oc of the bottom surfaces of the lower main legs 6b, 7b, and 8b are sequentially connected by straight lines. It is arranged to make. That is, the three main legs 6, 7, and 8 have the bottom center oa of the lower main leg 6b positioned at the center in the width direction on the front plate 2a side of the housing 2, and the bottom centers ob of the lower main legs 7b and 8b, It is arranged so that oc is located on both end sides on the back side 2d side, that is, on the pair of left and right side plates 2b and 2c. The triangle t may be a triangle that is substantially inscribed in a circle that forms an outer peripheral surface of the hot water storage tank 3 projected in a direction perpendicular to the bottom plate 2f, and may be a regular triangle. That is, the three main legs 6, 7, 8 are formed when the bottom center oa, ob, oc of the lower main leg 6b, 7b, 8b connects these bottom center oa, ob, oc with a straight line. It is arranged to be located at each vertex of the regular triangle.

  The three auxiliary legs 9, 10, 11 have the bottom center od, oe, of of the lower auxiliary legs 9 b, 10 b, 11 b located outside the triangle t and the sides a, b of the triangle t. , C are respectively divided into two equal parts and arranged so as to be positioned on vertical bisectors d, e, f that intersect in the vertical direction. In FIG. 1, g is a reinforcing rib that reinforces the strength of the bottom plate 2f. 1 to 3 and 8, reference numeral 15 denotes a pipe connection portion connected to a pipe such as a water supply pipe or a hot water supply pipe in the hot water storage tank unit 1 and is connected to an external water supply pipe or a hot water supply pipe. It has come to be.

  As shown in FIGS. 4 and 5, each of the auxiliary legs 9, 10, and 11 has a protruding length of each of the lower auxiliary legs 9b, 10b, and 11b protruding downward from the bottom plate 2f. It is formed shorter by a predetermined length α than the protruding length of 6b, 7b, 8b.

  Therefore, when the hot water storage tank unit 1 configured in this way is made to stand by handling or installing on the installation surface, the three main legs 6 to 8 are in contact with the self-standing surface and the installation surface, respectively. Therefore, even if the self-standing surface or the installation surface is inclined, it can be made self-supporting.

  When such a hot water storage tank unit 1 is self-supported, the hot water storage tank unit 1 receives a displacement load, for example, in the middle part direction of the three support legs 6 to 8, that is, in any one side direction of the triangle t. When tilted, at least one of the auxiliary legs 9, 10, 11 on the side to which the displacement load is applied contacts the self-standing surface or the installation surface and supports the hot water storage tank unit 1. Can be prevented. That is, it is possible to prevent the hot water storage tank unit 1 from falling over during an earthquake in which the direction of shaking of the hot water storage tank unit 1 cannot be predicted.

  Further, each auxiliary leg 9, 10, 11 has one end (upper end) of the upper auxiliary leg 9 a, 10 a, 11 a fixed to the lower outer peripheral surface of the hot water storage tank 3, and is fixed only to the bottom plate 2 f of the housing 2. Therefore, it is possible to prevent or reduce deformation of the casing 2 such as the bottom plate 2f and the front plate 2a, the side plates 2b and 2c, the back plate 2d, and the top plate 2e assembled to the bottom plate 2f. it can.

  Moreover, since the length of each lower auxiliary leg 9b, 10b, 11b is shorter than the length of the lower main legs 6b, 7b, 8b, it does not hinder the flatness at the time of installation work on site.

  Further, in the hot water storage tank unit 1, the main legs 6 are arranged at the width direction intermediate part of the bottom plate 2 f on the front side, while the left and right main legs 7 and 8 are arranged on both sides in the width direction of the bottom plate 2 f on the back side. And since the gravity center of the hot water storage tank 3 is arrange | positioned in the approximate center of the triangle which connects these main legs 6-8, the gravity center of the hot water storage tank unit 1 can be stabilized. Thereby, the possibility of the hot water storage tank unit 1 falling down can be further reduced. In addition, since only one of the main legs 6 disposed in the intermediate portion in the width direction is provided on the bottom plate 2f on the front side of the casing 2, the pipe connection portion 15 provided on the front side of the casing 2 is provided with the bottom plate 2f. It is possible to reduce the interference of the main legs 6 when the connected piping (not shown) is routed. For this reason, it is possible to improve the workability of pipe routing.

  After the hot water storage tank unit 1 has been installed, the gap between the auxiliary leg and the self-supporting surface may be eliminated by interposing a spacer between the bottom surface of the auxiliary leg 9, 10, 11 and the self-supporting surface. Well, according to this, the independence of the hot water storage tank unit can be further stabilized.

(Second Embodiment)
FIG. 8 shows the bottom surface of the hot water storage tank unit 1A according to the second embodiment. As shown in FIG. 8, the hot water storage tank unit 1A has a main feature in that the auxiliary leg 10 provided on the back plate 2d side of the hot water storage tank unit 1 according to the first embodiment is omitted.

  That is, as shown in FIG. 8, the hot water storage tank unit 1A has three main legs 6 at the apexes of the pentagon Q inscribed in the circle S forming the outer peripheral surface of the hot water storage tank 3 projected in the vertical direction on the bottom plate 2f. ˜8 and the two auxiliary legs 9, 11 are provided with the three main legs 6-8 and the two auxiliary legs 9, 11 so that the bottom centers oa, od, ob, oc, of of each of them coincide with each other. doing.

  That is, normally, the hot water storage tank unit 1A is often arranged so that the back plate 2d side is in contact with the outer wall surface of the house during installation. In this case, even if the hot water storage tank unit 1A is tilted to the outer wall surface side of the house due to an earthquake or the like, the tilt is supported by the outer wall surface of the house, so that the fall can be prevented. Thereby, in addition to the effect of 1st Embodiment, the auxiliary leg 10 by the side of the backplate 2d can be deleted, and cost reduction can be aimed at.

(Third embodiment)
FIG. 9 is an enlarged view of a main part of a hot water storage tank unit 1B according to the third embodiment. As shown in FIG. 9, this hot water storage tank unit 1B is characterized in that the length of the lower auxiliary legs 9b to 11b in the first and second embodiments can be adjusted.

  That is, the auxiliary legs 9 to 11 are formed by replacing the lower auxiliary legs 9b to 11b with a bottomless main body 16 having a U-shaped cross section at the top in FIG. 9 and a bottomed U-shaped at the bottom in FIG. It divides | segments into the movable bottom part 17, and the movable bottom part 17 is externally fitted to the lower end part in FIG.

  The body portion 16 has screw holes (not shown) that are screwed to the screw portions of the plurality of set bolts 18 and 18 in the left and right directions in FIG. It is installed side by side.

  On the other hand, the movable bottom portion 17 has a pair of opposing side surfaces of the U-shaped structure at the outer fitting portion thereof, and is slightly larger than the diameter of the screw portion of each set bolt 18 and smaller than the head portion 18a. A plurality of long holes 19, 19 that are long in the middle vertical direction) are formed.

  Therefore, the height of the movable bottom portion 17 can be adjusted as appropriate by adjusting the height (projection length) of the movable bottom portion 17 and then tightening the set bolts 18 and 18 firmly and fixing them to the main body portion 16.

  For this reason, until the installation of the hot water storage tank unit 1B is completed, the movable bottom portion 17 is positioned upward so that the protruding length of the auxiliary legs 9-11 from the bottom plate 2f is the protruding length of the three main legs 6-8. In order to make it smaller than the length and to be self-supporting when handling or installing it, first, the three main legs 6 to 8 are brought into contact with the self-supporting surface. And if installation of the hot water storage tank unit 1B is completed, the height (protrusion length) of each movable bottom part 17 of the auxiliary legs 9-11 will be adjusted, respectively, and the bottom face of these movable bottom parts 17 will be in contact with a self-supporting surface.

  As a result, the three main legs 6 to 8 and the two or three auxiliary legs 9 to 11 can all be brought into contact with the self-standing surface. For this reason, since the hot water storage tank unit 1B can be supported by the main legs 6 to 8 and the auxiliary legs 9 to 11, the support strength can be improved and the fall prevention effect can be further improved. be able to. In addition, although each said embodiment demonstrated the hot water storage tank unit of the heat pump water heater, this invention is not limited to this, You may apply to an electric water heater.

  As described above, the hot water storage tank unit of each embodiment is a triangle formed such that the length projecting downward from the lower surface of the housing is smaller than the projecting length of the main leg and connecting the three main legs. Since the auxiliary legs are provided outside, the hot water storage tank unit can be prevented from falling without hindering the flatness at the time of installation.

  As mentioned above, although several embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1,1A, 1B ... Hot water storage tank unit, 2 ... Housing, 3 ... Hot water storage tank, 6, 7, 8 ... Main leg, 6a, 7a, 8a ... Upper main leg, 6b, 7b, 8b ... Lower main leg, 9 , 10, 11 ... auxiliary leg, 9a, 10a, 11a ... upper auxiliary leg, 9b, 10b, 11b ... lower auxiliary leg, 17 ... movable bottom, 18 ... set bolt, 19 ... long hole, d, e, f ... vertical Bisector, oa, ob, oc ... bottom center of lower main legs 6b, 7b, 8b, od, oe, of ... bottom center of lower auxiliary legs 9b, 10b, 11b, t ... triangle.

Claims (4)

In a hot water storage tank unit comprising a housing and a hot water storage tank stored in the housing for storing hot water,
Three main legs with one end fixed to the hot water storage tank and the other end protruding downward from the lower surface of the housing;
An auxiliary leg that is formed to have a length that protrudes downward from the lower surface of the housing to be smaller than a protruding length of the main leg, and is located outside a triangle formed by connecting the three main legs;
With
A hot water storage tank unit having an insertion hole through which a screw shaft portion of an anchor bolt is inserted in a bottom portion of the main leg . The hot water storage tank unit according to claim 1, wherein one end of the auxiliary leg is fixed to the hot water storage tank. The main leg is disposed so as to be positioned at each vertex of the equilateral triangle, and the auxiliary leg is disposed so as to be positioned on a perpendicular bisector of each side of the triangle formed by the main leg. The hot water storage tank unit according to claim 1 or 2, characterized in that: The main legs are arranged such that one of them is located in the center in the width direction on the front side of the casing, and the other two are positioned on both ends in the width direction on the back side of the casing,
The hot water storage tank unit according to claim 1 or 2, wherein the auxiliary legs are arranged on both sides of a main leg arranged on the front side of the casing.

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