JP2002372312A - Hot water storage type electric water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric water heater decreased in limitation on the shape of a hot water storage tank and capable of effectively utilizing hot water in the hot water storage tank. SOLUTION: In the hot water storage tank 1 provided with a heater 4, a tap hole 3, a water supply hole 2, and an inflow tube 21 to make the water supply hole 2 guide inflow water to the bottom of a hot water tank 1, the end part of the inflow tube 21 is provided with an equalizing plate 5. Since, after water flowing in the hot water storage tank 1 through the inflow tube 21 collides with the equalizing plate 5 after colliding with a curvature bottom wall part 13 opposed to the equalizing plate 5, the velocity of water flowing out through the inflow tube 21 can be sufficiently reduced. Thereby, by suppressing agitation in the hot water storage tank 1, hot water in the hot water storage tank 1 can be utilized effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water storage tank of a hot water storage type electric water heater, and more particularly to a hot water storage type electric water heater suitable for effectively using hot water stored in the hot water storage tank at the time of tapping.

[0002]

2. Description of the Related Art The following is a detailed description of what has hitherto been found in Japanese Patent Application Laid-Open No. 10-205884.

FIG. 5 shows a top view and a vertical cross section of a hot water storage type electric water heater according to a conventional electric water heater. A low-temperature hot water storage tank 1E composed of a flat wall having a bottom wall 1b having a water supply port 2 supported by a structure 7, and a predetermined distance from the water supply port 2 disposed inside the hot water storage tank 1E. A baffle structure 6 having a current plate 5 which is opened and opposed to the current plate 5 and a fixing structure 10 for fixing the current plate 5 to the bottom wall 1b is provided. The baffle structure 6 is made of hot water heated by a heating device. It is configured to suppress an increase in the thickness of a boundary layer 9c formed by mixing hot water and water between the high-temperature region 9a and the low-temperature region 9b constituted by water supplied from the water supply port 2. Further, the water supply port 2 is formed at a position closer to the outer peripheral portion than the center of an imaginary line 8 connecting the center of the bottom wall portion 1b and the outer peripheral portion, and the straightening plate 5 and the fixing structure 10 of the baffle structure 6 are
It is configured to form two branch flows that flow in opposite directions along the surface of the bottom wall 1b and away from the imaginary line 8.

As described above, by forming the water inlet pipe near the outer peripheral portion of the bottom wall, it is possible to suppress an increase in the thickness of the boundary layer.

However, in the conventional hot-water storage type electric water heater, in order to suppress the flow velocity of the water flowing out of the water supply port, the water heaters run in opposite directions along the bottom wall surface and away from the imaginary line. Are configured to form two shunts flowing out of the water. For this reason, the bottom wall of the hot water tank had to be flat. In addition, it is necessary to arrange a water supply port provided in the hot water tank on the bottom wall of the hot water tank, and therefore, the shape of the hot water tank is restricted.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a hot-water storage type electric power supply system which has less restrictions on a hot-water storage tank shape and can effectively utilize hot water in the hot-water storage tank. It is to provide a water heater.

[0006]

Means for Solving the Problems To achieve the above object, a first aspect of the present invention is a hot water storage tank, a heating device for heating water in the hot water storage tank, and a water supply port for supplying water to the hot water storage tank. A water tap for discharging hot water in the hot water tank, and a water inlet for guiding inflow water to the bottom of the hot water tank, the hot water storage type electric water heater having the water inlet, wherein a straightening plate is provided at an end of the water inlet pipe. The opposing portion of the current plate was a free-form surface.

Therefore, the water flowing from the water inlet pipe into the hot water storage tank collides with the free-form surface facing the straightening plate and then collides with the straightening plate, so that the flow velocity of the water flowing out of the water inlet pipe can be sufficiently reduced. . For this reason, the thickness of the boundary layer formed by mixing hot water and water between the high-temperature region formed by the hot water heated by the heating device and the low-temperature region formed by the water supplied from the water supply port is increased. Can be suppressed, and the hot water in the hot water storage tank can be effectively used.

According to a second aspect of the present invention, since the free-form surface is a curved surface, the water flowing out of the water inlet pipe collides with the curved surface and then collides with the straightening plate. Flow area can be sufficiently reduced, and flows out at a uniform flow rate in the radial direction, so that a high-temperature area composed of hot water heated by a heating device and a low-temperature area composed of water supplied from a water supply port. The increase in the thickness of the boundary layer formed by mixing hot water with water can be suppressed, and the hot water in the hot water storage tank can be effectively used.

According to the third aspect of the invention, since the curvature surface is a cylindrical surface, the water flowing out of the water inlet pipe collides with the cylindrical surface and then collides with the straightening plate. The flow velocity can be sufficiently reduced, and hot water and water are mixed and formed between a high-temperature area composed of hot water heated by a heating device and a low-temperature area composed of water supplied from a water supply port. The increase in the thickness of the boundary layer can be suppressed, and the hot water in the hot water storage tank can be effectively used.

According to a fourth aspect, the hot water storage tank has a cylindrical surface,
Further, by placing the hot water tank vertically and having a configuration in which the bottom wall surface of the hot water tank has a curved surface, the water flowing out of the water inlet pipe collides with the curved surface, and then collides with the straightening plate. The flow rate of the water that has flowed out can be sufficiently reduced, and flows out at a uniform flow rate in the radial direction. It is possible to suppress an increase in the thickness of a boundary layer formed by mixing hot water and water between the hot water and a low-temperature region, and it is possible to effectively use hot water in a hot water storage tank.

According to a fifth aspect of the present invention, the hot water storage tank has a cylindrical surface,
Further, by making the hot water storage tank a horizontal arrangement,
After the water flowing out of the water inlet pipe collides with the cylindrical surface, and then collides with the flow straightening plate, the flow velocity of the water flowing out of the water inlet pipe can be sufficiently reduced, and the high temperature formed by the hot water heated by the heating device. It is possible to suppress an increase in the thickness of a boundary layer formed by mixing hot water and water between the region and the low-temperature region constituted by the water supplied from the water supply port, and to effectively use the hot water in the hot water storage tank. I can do it.

According to a sixth aspect of the present invention, the hot water storage tank is provided with a straightening plate having a curved surface at a position facing the water inlet pipe, so that water flowing out of the water inlet pipe regardless of the shape of the hot water tank. After colliding with the curvature surface, it collides with the flow straightening plate, so that the flow velocity of the water flowing out of the water inlet pipe can be sufficiently reduced, and the water is supplied from the high-temperature region constituted by the hot water heated by the heating device and the water supply port. The thickness of the boundary layer formed by mixing hot water and water with the low-temperature region constituted by hot water can be suppressed, and hot water in the hot water storage tank can be effectively used.

[0013] According to the seventh aspect of the present invention, the hot water storage tank is provided with a straightening plate having a cylindrical shape at a position facing the water inlet pipe, so that water flowing out of the water inlet pipe regardless of the shape of the hot water tank. After colliding with the cylindrical surface, it collides with the flow straightening plate, so that the flow velocity of the water flowing out of the water inlet pipe can be sufficiently reduced, and the water is supplied from the high-temperature region constituted by the hot water heated by the heating device and the water supply port. The thickness of the boundary layer formed by mixing hot water and water with the low-temperature region constituted by hot water can be suppressed, and hot water in the hot water storage tank can be effectively used.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of a hot water storage type electric water heater according to the present invention. (A) in FIG. 1 shows a vertical section, and (B) in FIG. 1 shows an upper surface. The hot water storage tank 1A has a curved surface bottom wall portion 13 and a water supply port 2.
The water inlet 21 is connected to the tap 3 and the water inlet 2, and the water inlet 21 is provided with a rectifying plate 5 at an end thereof for suppressing the flow rate of water flowing out of the water inlet 21. The tap 3 is connected to the feed pipe 14 and the tap 15 respectively. Further, the hot water tank 1A is provided with a heater 4 for heating, and is maintained at a preset hot water temperature by a temperature control device (not shown).

In the hot water storage type electric water heater having the above configuration,
When the water supply to the hot water storage tank 1A is started, the water passes from the water supply pipe 14 to the water supply port 2, and further passes through the water supply pipe 21 to be supplied to the hot water storage tank 1A.
Runs to bottom area. The water flowing out of the water inlet pipe 21 collides with the curvature bottom wall 13 of the hot water storage tank 1A as shown by an arrow A. Further, after the water reflected by the curvature bottom wall 13 collides with the current plate 5, the curvature bottom wall 1, which is an opposing portion of the current plate 5 and the current plate, is formed.
3 flows out to the hot water storage tank 1 </ b> A through the gap 16. That is, as described above, the water flowing out of the water inlet pipe 21 is subjected to two collisions, that is, the collision with the curvature bottom wall portion 13 and the collision with the rectification portion 5, so that the flow velocity of the water flowing into the hot water storage tank 1A is reduced. As a result, the hot water and the water are mixed and formed between the high-temperature region formed by the hot water heated by the heater 4 and the low-temperature region formed by the water supplied from the water supply port 2. An increase in the thickness of the boundary layer can be suppressed.

FIG. 2 shows a second embodiment of the hot water storage type electric water heater according to the present invention. 2A shows a longitudinal section, and FIG. 2B shows a transverse section. The hot water storage tank 1B has a cylindrical surface 22 and the cylindrical surface 22 is arranged horizontally. The hot water storage tank 1B has a water inlet 2, a tap 3 and a water inlet 21 connected to the water inlet 2. 21
Is provided with a flow straightening plate 5 at an end thereof for suppressing the flow rate of water flowing out of the water inlet pipe 21. The flow straightening plate 5 has a structure for reducing the flow of the hot water storage tank 1B in the longitudinal direction. 3 is connected with the water supply pipe 14 and the tapping pipe 15, respectively. Further, the hot water tank 1B is provided with a heater 4 for heating, and is maintained at a preset hot water temperature by a temperature control device (not shown).

In the hot water storage type electric water heater having the above configuration,
Similarly to the first example, when the water supply to the hot water storage tank B is started, the water passes through the water supply port 2 from the water supply pipe 14 and further flows out through the water supply pipe 21 to the bottom area of the hot water storage tank 1B. At this time, the water flowing out of the water inlet pipe 21 is classified into a flow along the cylindrical surface 22 of the hot water storage tank 1B and a flow in the longitudinal direction of the hot water storage tank 1B. The flow straightening plate 5 has a structure for suppressing the flow in the longitudinal direction of the hot water storage tank 1B so as to flow along the cylindrical surface of the hot water storage tank 1B.
Most of the water flowing out of the hot water tank 1B flows along the cylindrical surface 22 of the hot water storage tank 1B. Here, the water flowing out of the water inlet pipe 21 collides with the cylindrical surface 22 of the hot water storage tank 1B as shown by the arrow B.
Further, after the water reflected by the cylindrical surface 22 collides with the current plate 5,
Clearance 2 between current plate 5 and cylindrical surface 22 which is an opposing portion of current plate.
From 3 flows out to hot water storage tank 1B. That is, as described above, the water flowing out of the water inlet pipe 21 collides with the cylindrical surface 22 and the rectification unit 5
Two collisions are performed, and the hot water tank 1
The flow rate of the water flowing into B decreases. For this reason, the thickness of the boundary layer formed by mixing hot water and water between the high temperature region formed by the hot water heated by the heater 4 and the low temperature region formed by the water supplied from the water supply port is reduced. Increase can be suppressed.

FIG. 3 shows a third embodiment of the hot water storage type electric water heater according to the present invention. (A) in FIG. 3 shows a longitudinal section, and (B) in FIG. 3 shows an upper surface.
The hot water storage tank 1C includes a cylindrical surface 24 and a flat bottom wall 17, and has a configuration in which the cylindrical surface 24 is placed horizontally.
Is a water inlet 2, a tap 3 and a water inlet 21 in the water inlet 2.
The water inlet pipe 21 is provided at its end with a rectifying plate 5 for suppressing the flow rate of the water flowing out of the water inlet pipe 21, and the hot water storage tank 1C
A curved surface member 18 is provided at a position of the flat bottom wall portion 17 facing the rectifying plate 5, and the water supply port 2 and the tap hole 3 are provided with a water supply pipe 14.
And the tapping pipe 15 respectively. Further, the hot water tank 1C is provided with a heater 4 for heating, and is maintained at a preset hot water temperature by a temperature control device (not shown).

[0019] In the hot water storage type electric water heater having the above configuration,
Similarly to the first example, when the water supply to the hot water storage tank 1C is started, the water passes through the water supply port 2 from the water supply pipe 14, and further flows out to the bottom area of the hot water storage tank 1C via the water inlet pipe 21. At this time, the water flowing out of the water inlet pipe 21 is stored in the hot water tank 1C as shown by the arrow C.
Collides with the curvature surface member 18 provided in. Further, the water reflected by the curved surface member 18, which is the opposite portion of the current plate, collides with the current plate 5, and then flows out of the current plate 5 and the curved surface member 19 into the hot water storage tank 1 </ b> C. That is, as described above, the water flowing out of the water inlet pipe 21 is subjected to two collisions, the collision with the curvature surface member 18 and the collision with the rectification unit 5, so that the flow velocity of the water flowing into the hot water storage tank 1C decreases. This allows the heater 4
Accordingly, it is possible to suppress an increase in the thickness of a boundary layer formed by mixing hot water and water between a high-temperature region formed by hot water heated and a low-temperature region formed by water supplied from a water supply port.

FIG. 4 shows a fourth embodiment of the hot water storage type electric water heater according to the present invention.
(A) shows a longitudinal section, and (B) of FIG. 4 shows a transverse section. Hot water storage tank 1D has a rectangular parallelepiped shape having a longitudinal direction and a short direction, and hot water storage tank 1D is arranged horizontally. Hot water tank 1D
Is connected to a water inlet 2, a tap 3, and a water inlet 2, and a water inlet pipe 21 is connected to the water inlet 2. The water inlet pipe 21 has a flow straightening plate 5 at an end thereof for suppressing a flow rate of water flowing out from the water inlet pipe 21. A cylindrical surface member 20 is provided on the flat bottom wall portion 17 of the hot water storage tank 1D at a position facing the straightening plate 5, and the water supply port 2 and the tap hole 3 are connected to the water supply pipe 14 and the tap water pipe 15, respectively. Further, the hot water storage tank 1D includes a heater 4 for heating, and is maintained at a preset hot water temperature by a temperature control device (not shown).

In the hot water storage type electric water heater having the above configuration,
As in the first example, when the water supply to the hot water storage tank 1D is started, the water passes through the water supply port 2 from the water supply pipe 14, and further flows out to the bottom area of the hot water storage tank 1D via the water inlet pipe 21. At this time, the water flowing out of the water inlet pipe 21 is stored in the hot water storage tank 1D as indicated by an arrow D.
Collides with the cylindrical surface member 20 provided in. Further, the water reflected by the cylindrical surface member 20 collides with the current plate 5 and then flows out of the gap 25 between the current plate 5 and the cylindrical surface member 20 facing the current plate to the hot water storage tank 1D. That is, as described above, the water inlet pipe 21
The water flowing out of the hot water storage tank 1D is subjected to two collisions: a collision with the cylindrical surface member 20 and a collision with the flow straightening plate 5.
The flow rate of the water flowing into the inside decreases, and this causes hot water and water to flow between a high-temperature region formed by hot water heated by the heater 4 and a low-temperature region formed by water supplied from the water supply port. Can be suppressed from increasing the thickness of the boundary layer formed by mixing.

[0022]

According to the present invention, the following effects are exhibited by the above configuration.

In the hot water storage type electric water heater according to the first to third aspects of the present invention, water flowing out of the inflow pipe collides with a free-form surface, a curvature surface, or a cylindrical surface facing the straightening plate provided in the inflow tube. Then, by colliding with the current plate and flowing out into the hot water tank, the flow velocity of the inflowing water is reduced, and the stirring in the hot water tank is reduced, so that the hot water in the hot water tank can be effectively used.

In the hot water storage type electric water heater according to the present invention, the bottom surface of the hot water storage tank facing the rectifying plate has a curved surface or a cylindrical surface, so that the shape of the hot water storage tank is utilized. By reducing the flow velocity of the inflowing water and reducing the stirring in the hot water tank, the hot water in the hot water tank can be effectively used.

In the hot water storage type electric water heater according to the present invention, the curved surface member or the cylindrical surface member is disposed on the bottom wall portion of the hot water tank facing the rectifying plate, so that the bottom of the hot water tank is provided. Regardless of the shape of the wall, by reducing the flow rate of the inflowing water and reducing the stirring in the hot water tank,
The hot water in the hot water tank can be used effectively.

[Brief description of the drawings]

FIG. 1 shows a first example of an embodiment of the present invention.

FIG. 2 shows a second example of the embodiment of the present invention.

FIG. 3 shows a third example of the embodiment of the present invention.

FIG. 4 shows a fourth example of the embodiment of the present invention.

FIG. 5 shows a hot water storage type electric water heater according to a conventional embodiment.

[Explanation of symbols]

 Hot water tanks 1A, 1B, 1C, 1D, 1E Water inlets 2 Outlet 3 Heater 4 Rectifier plate 5 Baffle structure 6 Structure 7 Structure 8 High temperature area 9a Low temperature area 9b Boundary layer ... 9c Fixed structure ... 10 Openings ... 11a, 11b Wall-shaped legs ... 12a, 12b Curved surface bottom wall ... 13 Water supply pipe ... 14 Hot water pipe ... 15 Gap between straightening plate 5 and curved surface bottom wall 13 ... 16 Plane bottom wall part ... 17 Curvature surface member ... 18 Gap between straightening plate 5 and curvature member 18 ... 19 Cylindrical surface member ... 20 Water inlet pipe ... 21 Cylindrical surface ... 22,24 Gap between straightening plate 5 and cylindrical surface 22 ... 23 Clearance between current plate 5 and cylindrical surface member 20 ... 25

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toru Tsuruta 43-1 Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Nihon Yupro Co., Ltd. (72) Takanori Ogawa 2-chome Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka No. 1-1 F-term (reference) in TOTO Kiki Co., Ltd. 3L025 AD01 3L036 AB05 AB08 AC03

Claims (8)

[Claims] 1. A hot water tank and a heating device for heating water in the hot water tank, a water supply port for supplying water to the hot water tank, and a hot water outlet for tapping hot water in the hot water tank. In a hot water storage type electric water heater provided with a water inlet pipe for guiding inflow water at the bottom of the hot water tank at the water supply port, a straightening plate is provided at an end of the water inlet pipe, and an opposing portion of the straightening plate is a free curved surface. Hot water storage type electric water heater. 2. The hot water storage type electric water heater according to claim 1, wherein the free-form surface is a curvature surface. 3. The hot water storage type electric water heater according to claim 1, wherein the curvature surface is a cylindrical surface. 4. The hot-water storage type electric appliance according to claim 1, wherein the hot-water storage tank has a cylindrical surface, the hot-water storage tank is set upright, and the hot-water storage tank bottom wall has a curvature surface. Water heater. 5. The hot water storage type electric water heater according to claim 1, wherein the hot water storage tank has a cylindrical surface, and the hot water storage tank is placed horizontally. 6. The hot-water storage type electric water heater according to claim 1, wherein the hot-water storage tank includes a rectifying plate having a curved surface at a position facing the water inlet pipe. 7. The hot-water storage type electric water heater according to claim 1, wherein the hot-water storage tank is provided with a straightening plate having a cylindrical surface shape at a position facing the water inlet pipe. 8. The hot water tank has the water supply port and the tap hole on a ceiling of the hot water tank.
The hot water storage type electric water heater according to any one of claims 1 to 6.