JP2004093040A - Hot water storage-type water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water storage-type water heater surely preventing the breakage of a boundary face between the hot water and the cold water in a horizontally long hot water storage tank. <P>SOLUTION: This hot water storage-type water heater comprises the horizontally long hot water storage tank 4 connected to a water inlet pipe 7 and a hot water outlet pipe 5 and storing the water, and a heating means 2 for heating the water in the hot water storage tank 4. A water supply auxiliary pipe 9 communicating with the water inlet pipe 7 for supplying the water, is longitudinally extended on a bottom part of the hot water storage tank 4, further a baffle plate 10 expanded left and right is mounted on the water supply auxiliary pipe 9, and a water supply hole 11 composed of a plurality of small holes is formed on the water supply auxiliary pipe 9 at a lower part with respect to the baffle plate 10, whereby the rising force is weakened by the baffle plate even though the water supplied in the hot water storage tank is apt to straightly rise on an outer periphery of the water supply auxiliary pipe, and is spread outward to prevent the formation of the water flow, the boundary face of the hot water and the cold water can be properly kept without being broken, and the stored water of high temperature can be supplied as it is until the end. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a hot water supply type hot water supply device such as a heat pump water heater or an electric water heater.
[0002]
[Prior art]
When the conventional hot water storage tank is used horizontally, the water supply port is covered with baffles and a gentle uphill slope is provided at the bottom so that the boundary between water and high-temperature water is not broken by the water supply from the bottom water supply port. Formed. (For example, refer to Patent Document 1.)
[0003]
[Patent Document 1]
Japanese Patent No. 2579500
[Problems to be solved by the invention]
By the way, in this conventional system, the water supply is too strong to be controlled by the baffle alone, and a water flow that goes upwards vigorously occurs, destroying the boundary surface, mixing high-temperature water and water, and increasing the temperature of the hot water as a whole. In addition, the high temperature water cannot be supplied efficiently.
[0005]
The present invention focuses on this point and solves the above-mentioned drawbacks. In particular, the configuration of the hot water storage tank is formed by connecting a water inlet pipe and a hot water outlet pipe, and has a horizontally long shape to store hot water, and heating the hot water in the hot water storage tank. And a water supply auxiliary pipe extending in the longitudinal direction and communicating with the water inlet pipe at the bottom of the hot water storage tank. The water supply auxiliary pipe is further provided with a baffle plate extending left and right. The lower water supply auxiliary pipe is provided with a water supply hole composed of a plurality of small holes.
[0006]
By this, the feedwater flowing into the auxiliary water supply pipe is suppressed in momentum, is divided into a plurality of parts, is supplied from the water supply hole, and the supply water supplied into the hot water storage tank immediately rises along the outer periphery of the auxiliary water supply pipe, It is blocked by the baffle plate to reduce the rising power, and is diffused outward to prevent the formation of water flow, so that the boundary surface between hot water and water is kept well without being destroyed, and the high temperature stored hot water Water can be supplied to the end.
[0007]
According to the second and third aspects, a water flow blocking means for blocking a water flow from the lower side to the upper side along the inner wall of the hot water storage tank is provided at a substantially middle portion in the vertical direction of the hot water storage tank. The doughnut-shaped cut-off plate with a large opening at the center part can reliably prevent the water flow generated along the inner wall of the hot water storage tank from flowing into the high-temperature water layer, and further prevent the destruction of the boundary surface. Can be done.
[0008]
According to the fourth aspect, the water flow blocking means is constituted by a punched plate whose punching holes are roughened toward the outer periphery, thereby not only preventing the destruction of the boundary surface but also reinforcing the hot water storage tank. is there.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
1 is a hot water storage tank unit which is installed under the floor of a building in a horizontal type, 2 is a heating means comprising a heat pump unit, and 3 is a piping unit connecting the hot water storage tank unit 1 and the heating means 2.
[0010]
The hot water storage tank unit 1 is connected to a horizontally long hot water storage tank 4 for storing hot water, a hot water supply pipe 5 connected to an upper surface of the hot water storage tank 4 and a return pipe 6 from the heating means 2, and a lower part of the hot water storage tank 4. The water inlet pipe 7 and the outgoing pipe 8 leading to the heating means 2 are connected to each other, and a cylindrical water supply auxiliary pipe 9 communicating with the water inlet pipe 7 and supplying water extends in the longitudinal direction inside the hot water storage tank 4. And the end is closed.
[0011]
Further, the auxiliary water supply pipe 9 has a baffle plate 10 extending outward from the right and left side walls, and a pair of water supply holes 11 for discharging water obliquely downward to the auxiliary water supply pipe 9 below the baffle plate 10. Are provided in the longitudinal direction.
A donut is provided around the entire middle portion of the inner wall of the hot water storage tank 4 in a vertical direction to prevent water flow rising from below along the inner wall of the hot water storage tank 4. A blocking plate 12 having a shape is provided.
[0012]
The heating means 2 includes a compressor 13 for compressing a refrigerant, a refrigerant-water heat exchanger 14 as a condenser, a decompressor 15, a heat pump circuit 17 including an air heat exchanger 16 as an evaporator, A blower 18 that blows air to the exchanger 16, a circulating pump 20 of variable capacity provided in the middle of a circulating circuit 19 including the return pipe 6 and the outgoing pipe 8, and a refrigerant-water heat exchanger 14 inlet side of the circulating circuit 19. A heat exchange inlet temperature sensor 21 for detecting the temperature of hot and cold water flowing into the refrigerant-water heat exchanger 14, and a refrigerant-water heat exchanger provided on the refrigerant-water heat exchanger 14 outlet side of the circulation circuit 19; A heat exchange outlet temperature sensor 22 for detecting the temperature of the hot and cold water flowing out of the heater 14 and a heating control unit 23 for controlling the heating means 2 are provided.
[0013]
The piping unit 3 includes a mixing valve 25 that mixes high-temperature water from the tapping pipe 5 and low-temperature water from a branch pipe 24 branched from the inlet pipe 7, and a hot-water tap 26 connected downstream of the mixing valve 25. A hot water supply pipe 27, a hot water supply temperature sensor 28 provided in the hot water supply pipe 27, a hot water supply flow rate sensor 29 provided in the hot water supply pipe 27, and a hot water supply pipe branched from the hot water supply pipe 27 and connected to a circulation circuit 31 of a bathtub 30. 32, a heat insulation heater 33 and a bath circulation pump 34 for keeping the temperature of the bath water in the circulation circuit 31, a pressure reducing valve 35 of the water inlet pipe 7 and a pressure relief valve 36 of the hot water pipe 5, and control of these functional parts. The piping and functional parts are concentrated in the piping unit 3 so that the piping work at the time of installation and the maintenance work after the installation can be performed easily and efficiently. And those that are particularly effective are those particularly installing the hot water storage tank unit 1 under the floor of the building block.
[0014]
Next, the operation of the embodiment of the present invention will be described.
First, when heating the hot water in the hot water storage tank 4, the heating control unit 23 operates the heat pump circuit 17 and starts driving the circulation pump 20 of the circulation circuit 19. Hot water taken out from the lower part of the hot water storage tank 4 by the drive of the circulation pump 20 flows into the refrigerant-water heat exchanger 14 of the heating means 2, is heated and returned to the upper part of the hot water storage tank 4 via the circulation circuit 19. As a result, hot water is stored.
[0015]
Here, the output of the heat pump circuit 17 and the capacity of the circulation pump 20 are appropriately adjusted according to the detection values of the heat exchange inlet temperature sensor 21 and the heat exchange outlet temperature sensor 22 so that the hot water to be heated has a predetermined high temperature. It is variable. Specifically, the respective outputs and capacities are adjusted by feedforward control and / or feedback control according to the detection values of the heat exchange inlet temperature sensor 21 and the heat exchange outlet temperature sensor 22.
[0016]
Then, a hot water storage temperature sensor (not shown) provided on the side surface of the hot water storage tank 4 detects that a predetermined amount of high-temperature water has been stored, or the heat exchange inlet temperature sensor 21 detects a predetermined temperature or more. Then, the hot water supply control unit 37 instructs the heating control unit 23 to stop the heating operation, and the operations of the heat pump circuit 17 and the circulation pump 20 are stopped.
[0017]
On the other hand, when the hot water tap 26 is opened, the hot water stored in the hot water storage tank 4 is pushed out of the hot water storage tank 4 by the pressure from the water inlet pipe 7 to the hot water outlet pipe 5 and is controlled by the hot water supply controller 37. The mixing valve 25 mixes the low-temperature water in the branch pipe 24 with the temperature detected by the hot water supply temperature sensor 28 so as to be a predetermined temperature and supplies hot water through the hot water supply pipe 27. Hot water of a predetermined temperature can be applied to the bathtub 30. The predetermined temperature is arbitrarily set by an operation remote controller (not shown).
[0018]
Also, at this time, the water supply reduced by the use of the hot water supply flows into the hot water storage tank 4 at the water supply pressure, but this water supply is dispersed from the water supply hole 11 of the auxiliary water supply pipe 9 and further discharged downward. Further, the water flow that is going to rise immediately on the outer periphery of the water supply auxiliary pipe 9 after the discharge is obstructed by the baffle plate 10 and is spread outward, so that the momentum is weakened and the water flow rises as a large water flow or a mass of water. The hot water is prevented from being destroyed, and the boundary between the hot water and the water is prevented from being destroyed.
[0019]
Furthermore, when the hot water layer reaches the upper part from the center of the hot water storage tank 4, there is a danger that the supply water discharged downward by the water supply auxiliary pipe 9 will rise vigorously along the inner wall of the hot water storage tank 4 and the boundary surface will be destroyed. In the present invention, since the hot water storage tank 4 is provided with the shut-off plate 12 constituting the water flow shut-off means substantially at the center thereof, the flow of the water flowing up along the inner wall can be suppressed by the shut-off plate 12. It is guided to the center side together with the hot water and flows gently under the hot water layer to supply hot water to the end without breaking the boundary surface.
[0020]
Therefore, even in the horizontal hot water storage tank 4, the full amount of high-temperature water stored using inexpensive electric power can be used as a hot water supply in good quantity, and is extremely easy to use. However, it is possible to obtain a great effect while maintaining the above.
[0021]
Next, another embodiment shown in FIGS.
FIG. 4 shows a structure in which the water flow blocking means is constituted by a punching plate 39 in which a punching hole 38 is roughened toward the outer periphery. And a strong hot water storage tank 4 can be obtained.
[0022]
FIG. 5 shows a water-supply auxiliary pipe 9 having a rhombic cross section, which can be easily formed from a cylindrical shape and can be provided at a low cost.
Further, in this embodiment, the heat pump type water heater has been described, but the present invention is not limited to this, and the same effect can be obtained by an electric water heater using an electric heater as a heating means.
[0023]
【The invention's effect】
As described above, according to the present invention, the water supplied to the auxiliary water supply pipe is suppressed in momentum, is divided into a plurality of parts, and is supplied from the water supply hole, and the supply water supplied to the hot water storage tank is supplied along the outer periphery of the auxiliary water supply pipe. Immediately attempts to ascend, but is prevented by the baffle plate to weaken the ascending force, and is diffused outward to prevent the formation of water flow, so that the boundary between warm water and water is good without being destroyed And the hot water stored can be supplied as it is to the end.
[0024]
According to the second and third aspects, a water flow blocking means for blocking a water flow from the lower side to the upper side along the inner wall of the hot water storage tank is provided at a substantially middle portion in the vertical direction of the hot water storage tank. The doughnut-shaped cut-off plate with a large opening at the center part can reliably prevent the flow of water generated along the inner wall of the hot water storage tank into the high-temperature water layer, and further prevent the destruction of the boundary surface. Can be done.
[0025]
According to the fourth aspect of the present invention, the water flow cutoff means is constituted by a punched plate whose punched holes are roughened toward the outer periphery, thereby not only preventing the destruction of the boundary surface but also reinforcing the hot water storage tank. is there.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a hot water supply type hot water supply apparatus to which one embodiment of the present invention is attached.
FIG. 2 is a sectional view of the hot water storage tank.
FIG. 3 is a cross-sectional view of the water supply auxiliary pipe. FIG. 4 is a cross-sectional view of a hot water storage tank showing another embodiment.
FIG. 5 is a cross-sectional view of a water supply auxiliary pipe showing another embodiment.
[Explanation of symbols]
2 heating means 4 hot water storage tank 5 tapping pipe 7 water inlet pipe 9 water supply auxiliary pipe 10 baffle plate 11 water supply hole 12 cutoff plate (water flow cutoff means)
39 Punching plate (water flow blocking means)

Claims (4)

A water supply tank having a horizontally long hot water tank connected to a water inlet pipe and a hot water pipe for storing hot water, and a heating means for heating the hot water in the hot water storage tank; Auxiliary pipes are provided extending in the longitudinal direction. Further, a baffle plate extending left and right is provided on the auxiliary water supply pipe, and a water supply hole comprising a plurality of small holes is provided on the auxiliary water supply pipe below the baffle plate. A hot water storage type hot water supply device characterized by the following. The hot-water storage type hot-water supply device according to claim 1, further comprising a water-flow blocking unit configured to block a water flow from a lower portion to an upper portion along an inner wall of the hot-water storage tank at a substantially middle portion in the vertical direction of the hot-water storage tank. 3. The hot water supply type hot water supply apparatus according to claim 2, wherein said water flow shutoff means is constituted by a donut-shaped shutoff plate having a central portion largely opened. 3. The hot water supply apparatus according to claim 2, wherein the water flow cutoff means is constituted by a punching plate whose punching holes are roughened toward an outer periphery.

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