JP2002089961A - Tank for hot water supply apparatus and indirect hot water output type hot water supply apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tank for a hot water supply apparatus capable of improving a thermal storage efficiency even in a long lateral tank and an indirect hot water output type hot water supply apparatus. SOLUTION: The tank for the long lateral hot water supply apparatus comprises an inlet 50 provided at an upper side of a side wall face 46 of a storage unit 4a, and an outlet 51 provided at a lower side of a side wall face 47 of an opposite side. The tank further comprises a plurality of upper ribs 42 extended from an upper wall surface 40 to form a lower opening 45 between a lower wall surface 41 and the surface 40 substantially parallel to the side wall faces 46 and 47, and a plurality of lower ribs 43 extended from the lower wall surface 41 to form an upper opening 44 between the upper wall surface 40 and the surface 41, sequentially alternately from the ribs 42 toward the outlet 51 side from the inlet 50 side. In this case, a volume of a space formed from the opening 45 to a root of the next rib 42 via the opening 44 is smaller than that of a thermal boundary layer formed in the storage unit 4a of the case not having both the ribs 42 and 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater tank and an indirect hot water heater.

[0002]

2. Description of the Related Art As shown in FIG. 7, a tank 4 for storing a hot-water supply fluid of a conventional water heater has been known to be horizontally long so that it can be installed in a place having a small vertical dimension. I have. (For example, JP-A-8-219546)

[0003]

However, while the heated hot-water supply fluid is repeatedly stored in the tank 4 or flows out of the tank 4 for hot-water supply, the hot-water supply fluid in the tank 4 is in contact with the high-temperature portion. When divided into a low temperature part, a temperature boundary layer A is generated due to a difference in specific gravity between the two. The thickness a of the temperature boundary layer A is the same irrespective of the outer shape of the tank 4 in the horizontal direction or the vertical direction. In the horizontal tank 4, the volume of the temperature boundary layer A increases due to the large cross-sectional area in the horizontal direction. The storage efficiency will decrease as heat loss. Then, the heat transfer from the high-temperature portion to the low-temperature portion through the temperature boundary layer A causes a problem that the temperature of the high-temperature portion is greatly reduced, and the heat storage efficiency is reduced.

An object of the present invention is to provide a water heater tank and an indirect hot water heater that can improve the heat storage efficiency even in a horizontally long tank.

[0005]

The present invention employs the following technical means to achieve the above object.

According to the first aspect of the present invention, an inlet (50) into which the hot water supply fluid heated by the heating means (2) flows, and the inlet (50) is provided on one side, and the hot water supply inflow is provided. A horizontally long storage section (4a) for storing a fluid,
An outlet (51) is provided on the other side of the storage section (4a), and is provided on the side of the outlet (51) for flowing the low-temperature hot-water supply fluid in the storage section (4a) to the heating means (2), and is provided on the side of the inlet (50). Department (4
a) an external outflow port (81) through which the high-temperature hot-water supply fluid in (a) flows out to the external flow path (8a); In the water heater tank having an external inflow port (80) into which the hot water flows, the storage portion (4a) has an upper wall surface (40) and a lower wall surface (41) so as to intersect with the flow direction of the hot water fluid. )
Toward the lower opening (4) between the lower opening (4) and the lower wall (41).
5) and a lower rib (43) extending from the lower wall surface (41) toward the upper wall surface (40) and forming an upper opening (44) between the upper wall surface (40). ) Are provided alternately in order from the upper rib (42) toward the outlet (51) from the inlet (50).

At this time, the volume of the space formed between the lower opening (45) and the root of the next upper rib (42) via the upper opening (44) and the upper opening (44). Through the lower opening (45) to the root of the next lower rib (43).
2), the storage part (4a) without the lower rib (43)
It is characterized in that the volume is smaller than the volume of the temperature boundary layer of the hot water supply fluid formed therein.

Accordingly, when the heated high-temperature hot-water supply fluid is stored from the inflow port (50) to the outflow port (51), the low-temperature hot-water supply fluid is extruded in accordance with the stored flow rate. , Flows in from any lower opening (45), mixes with the remaining low-temperature hot-water supply fluid, and passes through the upper opening (44) to reach the root of the next upper rib (42). Is formed.

Conversely, when the heated high-temperature hot-water supply fluid flows from the external inlet (80) to the external outlet (81), the external flow path (8) depends on the flow rate.
b) the hot water supply fluid returned from b) flows through the optional upper opening (44) while extruding the hot water supply fluid;
Mixed with the remaining high-temperature hot-water supply fluid, and the lower opening (45)
A temperature boundary is formed between the upper rib (43) and the root of the next lower rib (43). It is determined by the volume of the set space and can be made smaller than the volume of the temperature boundary layer formed in the storage portion (4a) when both ribs (42, 43) are not provided, so that the heat storage efficiency can be improved.

Further, according to the present invention, the inflow port (50) and the external outflow port (81) are connected to the storage section (4).
a) is provided above one of the side walls (46), and the outlet (51) and the external inlet (80) are provided below the opposite side wall (47). And each side wall surface (4
6, 47) at the longitudinal end of the storage portion (4a), the volume of the formed temperature boundary can be reduced in the width direction from the longitudinal direction of the storage portion (4a), so that the heat storage efficiency is further improved. it can.

Further, when the hot-water supply fluid flows from the inflow port (50) to the outflow port (51), the upper opening (45) adjacent to the lower opening (45). 4
If the volume formed during 4) is made smaller than the volume formed between the upper opening (44) and the adjacent lower opening (45), the volume at the temperature boundary is further increased. And the heat storage efficiency can be improved.

According to the present invention, the storage portion (4a) extends from substantially the center of the one side wall surface (46) toward the opposite side wall surface (47), and the opposite side. A vertical wall-shaped partition plate (48) that forms a horizontal opening (49) is provided between the partition plate (48) and the side wall surface (47), and the inlet (50) and the external outlet (81) are connected to the partition plate (48). The outlet (51) and the external inlet (80) are connected to one space in the storage part (4a) divided by the storage part (4a).
It communicates with the other space in a).

[0013] In each space of the storage portion (4a), it extends from the upper wall surface (40) toward the lower wall surface (41) so as to be substantially parallel to each side wall surface (46, 47).
An upper rib (42) forming a lower opening (45) with the lower wall surface (41), extending from the lower wall surface (41) toward the upper wall surface (40), and between the upper rib surface (40); Upper opening (44)
And a plurality of sets of lower ribs (43) forming a plurality of pairs are provided alternately from the upper rib (42) in order from the inlet (50) side to the outlet (51) side via the lateral opening (49).

At this time, the volume of the space formed between the lower opening (45) and the root of the next upper rib (42) via the upper opening (44) and the upper opening (44). Through the lower opening (45) to the root of the next lower rib (43).
2), the storage part (4a) without the lower rib (43)
It is characterized in that the volume is smaller than the volume of the temperature boundary layer of the hot water supply fluid formed therein.

The inlet (50) and the external outlet (8)
1) is provided on one upper side of one of the side walls (46) separated by the partition plate (48), and the outlet (5) is provided.
1) and the external inlet (80) are provided on the lower side of the other side wall (46) delimited by the partition plate (48), and each side wall surface (46, 47) is provided with a storage portion ( It is preferable to be on the end side in the longitudinal direction of 4).

Further, when the hot-water supply fluid flows from the inlet (50) to the outlet (51), the volume formed between the lower opening (45) and the adjacent upper opening (44) is increased. , Is preferably smaller than the volume formed between the upper opening (44) and the adjacent lower opening (45).

Thus, the volume of the temperature boundary formed by the central partition plate (48) can be further reduced, and the heat storage efficiency can be improved.

Further, since the flow of the hot-water supply fluid is reversed and each of the inlets (50, 80) and each of the outlets (51, 81) can be set on the same side wall surface (46), the piping can be easily constructed. Become.

According to the invention described in claim 7, the water storage tank (4) for storing the heat storage fluid heated by the heating means (2) and the heat storage fluid flowing out of the water storage tank (4). In an indirect hot-water supply type water heater having a heat exchanger (6) for heating water for hot water supply by heat exchange, a water heater tank (4) according to any one of claims 1 to 6 is used as a water heater tank (4). Water heater tank (4)
Are molded integrally with resin.

Thus, in the indirect hot water supply system which does not need to be set as a pressure-resistant container, it is possible to use a resin-molded tank, and the ribs (42, 43) according to claims 1 to 6 can be used. The water heater tank (4) having the above structure can also be provided by being integrally provided by resin molding, and can provide a water heater that is inexpensive and has excellent heat storage efficiency.

Then, as in the invention according to claim 8,
The upper rib (42) and the lower rib (43) of the water heater tank (4) are formed hollow, and the heat insulating material (1) is provided inside the hollow.
By providing 5), a heat insulating effect is obtained for both ribs (42, 43), it is possible to prevent the volume at the temperature boundary from increasing, and it is possible to improve the heat storage efficiency.

Note that the reference numerals in parentheses of the above means indicate the correspondence with the specific means described in the embodiment described later.

[0023]

(First Embodiment) FIGS. 1 to 3 show a first embodiment of the present invention. In the first embodiment, the hot water supply tank 4 of the present invention is applied to an indirect hot water supply type water heater 1. First, the overall structure is shown in FIG. 1 and the water heater tank 4 is shown in FIGS. Will be explained.

Indirect hot water heater (hereinafter referred to as hot water heater)
1 is used for general household use, and comprises a heating unit 2 as a heating means, a tank for a water heater (hereinafter referred to as a tank) 4, a heat exchanger 6, and the like.

The heating section 2 has an electric heater therein.
The hot water supply fluid is heated to a predetermined temperature. The heating source is not limited to the electric heater, but may be a heat pump cycle or the like that operates by using a refrigerant such as CO ₂ at a high temperature and a high pressure.

The fluid for hot water supply contains water as a main component, and is added with a preservative, an antifreezing agent, LLC and the like as needed.

The outflow section 21 of the heating section 2 and the tank 4 described later
Is connected by a pipe 5a, and a pump 3 for discharging a heated hot-water supply fluid is provided between the pipes 5a.

The tank 4 comprises a storage section 4a for storing a hot-water supply fluid, respective inlets 50, 80, respective outlets 51, 81, and the like. The tank 4 is flat in the vertical direction so that it can be installed in a dead space such as under the floor. Horizontal rectangular parallelepiped (longitudinal dimension L,
The dimension W in the width direction and the dimension H in the height direction). The inside of the storage part 4a is opened to the atmosphere through the air holes 4b and kept at the atmospheric pressure.

The side wall surface 46 at the longitudinal end of the storage portion 4a
The inlet 5 through which the heated hot water supply fluid flows in
0 and the external outlet 81 through which the high-temperature hot-water supply fluid stored in the storage section 4a flows out to the external pipe 8a forming an external flow path.
Is provided.

On the other hand, the side wall surface 4 opposite to the side wall surface 46
An outlet 51 through which the low-temperature hot-water supply fluid flows out and an external inlet 80 through which a hot-water supply fluid from the heat exchanger 6 described later flows in are provided below 7. The outlet 51 is connected to the inlet 22 of the heating unit 2 by the pipe 5b.

A plurality of in-tank temperature sensors 11 for detecting the temperature of the hot water supply fluid are provided at predetermined intervals inside the storage section 4a along the flow direction of the hot water supply fluid (here, the longitudinal direction of the storage section 4a). ing. Then, as shown in FIGS. 2 and 3, the hot water supply fluid intersects with the flow direction, that is,
The upper wall surface 40 is substantially parallel to each of the side wall surfaces 46 and 47.
And an upper rib 42 extending from the lower wall surface 41 toward the lower wall surface 41 and forming a lower opening 45 that opens small between the upper rib surface 42 and the lower wall surface 41 toward the upper wall surface 40. A plurality of sets, that is, the same number of the lower ribs 43 that form the upper opening 44 that opens small, are provided alternately from the upper rib 42 toward the outlet 51 side from the inlet 50 side.

Further, the volume of the space (part B in FIG. 3A) formed from the lower opening 45 to the root of the next upper rib 42 via the upper opening 44 and the upper opening The upper rib 42 and the lower rib 43 are provided to define the volume of the space (part C in FIG. 3B) formed from 44 to the base of the next lower rib 43 via the lower opening 45. In this case, the volume is smaller than the volume of the temperature boundary layer (the conventional temperature boundary layer A shown in FIG. 7) of the hot-water supply fluid formed in the storage section 4a when not in operation.

Specifically, first, regarding the volume of the temperature boundary layer A in the prior art, a temperature sensor is arbitrarily installed in the water level direction (up and down direction) of the storage section 4a, and the temperature distribution is checked by checking the temperature distribution. Thickness a occupying intermediate temperature part with low temperature part
(That is, the thickness a of the temperature boundary layer A) is grasped, and the volume of the temperature boundary layer A is obtained by Expression 1. (The external dimensions of the storage part 4a are a width dimension W and a longitudinal dimension L as shown in FIG. 2.) (Equation 1) Volume of A = W × L × a Next, as shown in FIG. The distance between the upper rib 42 and the lower rib 43 is b, the thickness of each of the ribs 42 and 43 is c, and the upper opening 44
Where d is the dimension of the lower opening 45 and e is the dimension of the lower opening 45, the volumes of the B portion and the C portion in the present embodiment are obtained by Expressions 2 and 3, and the volume of the upper rib 42 and the lower rib 43 is mainly By reducing the distance b, the volume of the temperature boundary layer A is made smaller.

(Equation 2) Volume of part B = W × b × H + W × c × d + W × b × d (Equation 3) Volume of part C = W × b × H + W × c × e + W × b × e Each part of the tank 4 having the configuration is integrally formed by resin molding (blow molding).

The heat exchanger 6 turns hot water into hot water by heat exchange between a heated hot water supply fluid and hot water.
The tank 4 is connected to the tank 4 by external pipes 8a and 8b forming an external flow path, and a pump 7 is provided between the external pipes 8a. Hot-water supply water is connected to hot-water supply pipes 9a and 9b so that the inside of the heat exchanger 6 faces the hot-water supply fluid, and the heat exchanger 6 operates as a counter-flow heat exchanger. . The hot water supply pipe 9b is provided with a hot water supply temperature sensor 12 for detecting the temperature of the hot water and a hot water supply flow rate sensor 13 for detecting the flow rate of the hot water.

Electronic control unit (hereinafter referred to as ECU) 14
Controls the ON / OFF control of the pump 3 and the discharge flow rate of the hot-water supply fluid based on the detection signal of the in-tank temperature sensor 11. In addition, ON / OFF of the pump 7 is controlled based on a detection signal of the hot water supply water flow sensor 13, and a discharge flow rate of the pump 7 is controlled based on a detection signal of the hot water temperature sensor 12.

Next, the operation of the water heater 1 and the tank 4 having the above configuration will be described.

First, the operation of the water heater 1 will be described. The ECU 14 checks the remaining amount of the high-temperature hot water supply fluid based on the detection signal of the tank temperature sensor 11 mainly in the late night time when the electricity rate is low. Operates the pump 3 and supplies a predetermined amount of a heated high-temperature hot-water supply fluid from the heating unit 2 to the pipe 5.
a and 5b are stored in the tank 4 so as to circulate. Also, depending on the amount of hot water used by the user, the hot water supply fluid that is hot even during the day is similarly stored by the ECU 14 for replenishment. Note that the hot water supply fluid in the tank 4 only needs to be able to secure a heat amount corresponding to the usage amount of the hot water supply water, so that the entire hot water supply fluid in the tank 4 does not necessarily need to be maintained at a high temperature.

When the user uses the hot-water supply water, the hot-water supply water flows through the hot-water supply pipes 9a and 9b and the heat exchanger 6, and the ECU 14 receives the detection signal of the hot-water supply flow rate sensor 13 and the detection signal of the hot-water supply temperature sensor 12. Activates the pump 7,
A predetermined amount of stored hot water supply fluid is discharged from the tank 4 to the heat exchanger 6 so as to circulate through the external pipes 8a and 8b. The heat exchanger 6 exchanges heat between the high-temperature hot-water supply fluid and the hot-water supply water, and the hot-water supply water becomes hot water and is used.

Next, the operation of the hot water supply fluid in the tank 4 will be described with reference to FIGS. 3 (a) and 3 (b). Here, the operation in the case where the hot water supply fluid is stored in the tank 4 and the case where the stored hot water supply fluid flows out will be described separately.

The hot water supply fluid is heated mainly during the late night hours when the electricity rate is low and the required amount is stored in the storage section 4a, or the hot water supply fluid remains due to the use of daytime hot water supply water. When the amount decreases and is stored again in the storage part 4a for replenishment, the hot water supply fluid flows in from the inflow port 50 and passes through the lower opening 45 of the upper rib 42 and the upper opening 44 of the lower rib 43. The upper and lower U-turns are repeated while flowing to the outlet 51 side. At this time, the heated high-temperature hot-water supply fluid flows in from any lower opening 45 while extruding the low-temperature hot-water supply fluid in accordance with the stored flow rate, and mixes with the remaining low-temperature hot-water supply fluid, A temperature boundary B is formed between the upper opening 44 and the root of the next upper rib 42.

Conversely, when the heated high-temperature hot-water supply fluid flows out of the external outlet 81 for heat exchange with hot-water supply water, the low-temperature hot water returned from the external pipe 8b in accordance with the flow rate is discharged. The hot water supply fluid flows in from any upper opening 44 while extruding the hot water supply fluid, mixes with the remaining high temperature hot water supply fluid, and passes through the lower opening 45 to form the next lower rib 43. A temperature boundary C is formed before reaching the root.

Thus, the volumes of the temperature boundaries B and C are determined mainly by the volume of the space in which the interval between the upper rib 42 and the lower rib 43 is set small in advance, and the tank 4 shown in FIG.
Can be smaller than the volume of the temperature boundary layer A formed in the entire volume of the storage section 4a, so that the heat storage efficiency can be improved.

Further, since the ribs 42 and 43 are set so as to be arranged in the longitudinal direction of the tank 4, the volume of the formed temperature boundary can be reduced in the width direction (W is smaller than L in the width direction). Can reduce the volume.), And the heat storage efficiency can be further improved.

Further, in the above-mentioned indirect hot-water supply type water heater 1 which does not need to be set as a pressure-resistant container, it is possible to use a resin-molded tank, and the tank 4 having both ribs 42 and 43 inside is also formed by resin molding. It is possible to provide an inexpensive water heater with excellent heat storage efficiency that can be coped with by being provided integrally.

(Second Embodiment) FIG. 4 shows a second embodiment of the present invention. The second embodiment is different from the first embodiment in that the distance between the upper rib 42 and the lower rib 43 is changed.

Here, a high-temperature hot-water supply fluid is supplied to the inlet 50.
When flowing from the side to the outlet 51 side, the volume formed from the lower opening 45 of the upper rib 42 to the upper opening 44 of the adjacent lower rib 43 is adjacent to the upper opening 44 of the lower rib 43. The volume is made smaller than the volume formed while reaching the lower opening 45 of the upper rib 42. Specifically, the distance between the upper rib 42 and the lower rib 43 is b1, and the lower rib 43
When the space between the upper rib 42 and the upper rib 42 is b2, the space b1 is smaller than the space b2, and the magnitude relationship between the volumes is determined.

Thus, the volume of the formed temperature boundary can be further reduced, and the heat storage efficiency can be improved.

(Third Embodiment) FIG. 5 shows a third embodiment of the present invention. The third embodiment is different from the first and second embodiments in that the rib structure in the storage part 4a of the tank 4 and the flow of the hot water supply fluid are changed.

In the storage portion 4a, the side wall surface 46 extends from substantially the center of the side wall surface 46 toward the opposing side wall surface 47.
7 and a vertical wall-shaped partition plate 4 forming a horizontal opening 49 between
8 are provided.

The inlet 50 and the external outlet 81 communicate with one space in the storage part 4a divided by the partition plate 48, and the outlet 51 and the external inlet 80 communicate with the other space in the storage part 4a. Is made to communicate. Specifically, one of the side wall surfaces 46 divided by the partition plate 48 (here, the right surface shown in FIG. 5A)
An inlet 50 and an external outlet 81 are provided on the upper side, and the outlet 5 is provided on the lower side of the other side wall surface 46 (here, the left side surface shown in FIG.
1 and an external inlet 80 are provided.

Further, the upper rib 42 and the upper opening 44 forming the lower opening 45 are formed in the respective spaces of the storage section 4a divided by the partition plate 48, as in the first embodiment. A plurality of lower ribs 43 are alternately arranged in order from the upper rib 42 from the inflow port 50 side to the outflow port 51 side through the lateral opening 49, that is, the same number, preferably, the same number of pieces on the left and right sides. Is provided.

The volume of the space formed from the lower opening 45 through the upper opening 44 to the root of the next upper rib 42 and the upper opening 44 through the lower opening 45. The volume of the space formed before reaching the base of the next lower rib 43 is changed by the temperature boundary layer of the hot-water supply fluid formed in the storage portion 4a when the upper rib 42 and the lower rib 43 are not provided. The temperature of the prior art shown in FIG. 7 is now smaller than the volume of the boundary layer A). In this case as well, each volume is determined in the same manner as in the first embodiment, and the volume is set so that the magnitude relation is established.

The hot water supply fluid is supplied from the inlet 50 to the storage section 4a.
While flowing in between the two ribs 42 and 43, the flow direction is further reversed at the lateral opening 47, and the upper and lower U-turns are repeated to flow out from the outlet 51. Also,
When the hot water supply fluid flows out to the external circuit 8a, a flow reverse to the above is formed.

As a result, the volume of the temperature boundary formed by the central partition plate 48 in the storage section 4a can be further reduced, and the heat storage efficiency can be improved.

Further, since the flow of the hot-water supply fluid is reversed at the lateral opening 49 and each of the inlets 50 and 80 and each of the outlets 51 and 81 can be set on the same side wall surface 46, the piping work is facilitated. .

(Fourth Embodiment) FIG. 6 shows a fourth embodiment of the present invention. The fourth embodiment uses a heat insulating material to prevent the formed temperature boundary from expanding.

According to the resin blow molding, the inside of the upper rib 42 and the lower rib 43 in the storage portion 4a of the tank 4 has a hollow portion corresponding to the thickness of the mold of the portion where both ribs 42 and 43 are molded. In this hollow portion, a heat insulating material 15 such as glass wool or urethane is provided.

As a result, the ribs 42 and 43 have a heat insulating effect, can prevent the volume at the temperature boundary from increasing, and can improve the heat storage efficiency.

(Other Embodiments) The first to fourth embodiments described above
In the embodiment, the tank 4 is described as an integrally molded product made of a resin material. However, the tank 4 may be made of a metal material (for example, stainless steel) and have a heat insulating structure.

Each of the inlets 50, 80,
The outlets 51 and 81 are provided on both side walls (side walls orthogonal to the side walls 46 and 47) in the longitudinal direction of the tank 4 according to the position of the pipe, and the upper rib 42 and the lower rib 43 are provided on the both side walls. May be provided so as to be substantially parallel to.

Further, the water heater tank 4 of the present invention is made of, for example, a metal material (stainless steel or the like), is a pressure-resistant closed container having no air hole 4b, and is a direct tap water using tap water or the like as a hot water supply fluid. It may be used for a hot water heater.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an entire water heater according to a first embodiment of the present invention.

FIG. 2 is a transparent perspective view showing a structure inside a tank of FIG. 1;

FIG. 3A is a cross-sectional view showing the flow of a hot-water supply fluid in a tank during storage and the state of formation of a temperature boundary, and FIG. 3B is a cross-sectional view showing the flow of a hot-water supply fluid in the tank and the temperature boundary during outflow. It is sectional drawing which shows the state of formation.

FIG. 4 is a transparent perspective view showing a structure inside a tank according to a second embodiment of the present invention.

FIG. 5A is a transparent perspective view and FIG. 5B is a horizontal sectional view showing a structure inside a tank according to a third embodiment of the present invention.

FIG. 6 is a sectional view showing a structure inside a tank according to a fourth embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a temperature boundary layer in a tank according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Indirect hot-water supply type water heater 2 Heating part (heating means) 4 Water heater tank 4a Storage part 40 Upper wall surface 41 Lower wall surface 42 Upper rib 43 Lower rib 44 Upper opening 45 Lower opening 46, 47 Side wall 48 Partition plate 49 Side Opening 50 Inflow 51 Outflow 6 Heat exchanger 8a, 8b External piping (external flow path) 80 External inflow 81 External outflow 15 Thermal insulation

Claims (8)

[Claims] An inflow port (50) into which a hot water supply fluid heated by a heating means (2) flows, and the inflow port (50) are provided on one side, and a horizontally long storage section for storing the inflowing hot water supply fluid. (4a), provided on the other of the storage section (4a), and the storage section (4
an outlet (51) through which the low-temperature hot-water supply fluid in a) flows out to the heating means (2); and the storage section (4a) provided on the inlet (50) side.
An external outlet (81) through which the high-temperature hot-water supply fluid flows out into the external flow path (8a); and an external flow path (8) provided on the outlet (51) side.
b) an external inlet (8) through which a low-temperature hot-water supply fluid flows from
0), the storage portion (4a) extends from the upper wall surface (40) toward the lower wall surface (41) so as to intersect with the flow direction of the hot water supply fluid, and The lower opening (4
An upper rib (42) forming 5) and a lower rib extending from the lower wall surface (41) toward the upper wall surface (40) to form an upper opening (44) between the upper wall surface (40). The ribs (43) are alternately arranged in order from the upper rib (42) from the inlet (50) side to the outlet (51).
A plurality of sets are provided toward the side, and the volume of the space formed between the lower opening (45) and the root of the next upper rib (42) via the upper opening (44) and The volume of the space formed between the upper opening (44) and the next root of the lower rib (43) via the lower opening (45) is equal to the volume of the upper rib (42). A tank for a water heater, wherein the volume is smaller than a volume of a temperature boundary layer of a hot water supply fluid formed in the storage portion (4a) when the lower rib (43) is not provided. 2. The inflow port (50) and the external outflow port (81) are provided on one side wall (4) of the storage section (4a).
6), the outlet (51) and the external inlet (80)
The side wall surface (4) opposite to the one side wall surface (46)
7) The tank for a water heater according to claim 1, wherein each of the side wall surfaces (46, 47) is provided on a lower side, and is a longitudinal end side of the storage section (4a). 3. When the hot water supply fluid flows from the inflow port (50) to the outflow port (51), the lower opening (4) is closed.
The volume formed between the upper opening (44) and the adjacent upper opening (44) is smaller than the volume formed between the upper opening (44) and the adjacent lower opening (45). The hot water supply tank according to claim 1 or 2, wherein 4. An inflow port (50) into which a hot water supply fluid heated by the heating means (2) flows, and a horizontally long storage section (4a) storing the hot water supply fluid flowing in from the inflow port (50).
An outlet (51) through which the low-temperature hot-water supply fluid in the storage section (4a) flows out to the heating means (2); and an external flow path (high-temperature) in the high-temperature hot-water supply fluid in the storage section (4a). 8a) and an external inflow port (80) into which a low-temperature hot water supply fluid flows from another external flow path (8b). ), The lateral opening (4) extends from substantially the center of one of the side wall surfaces (46) toward the side wall surface (47) on the opposite side and between the side wall surface (47) on the opposite side.
A vertical wall-shaped partition plate (48) forming 9) is provided. The inflow port (50) and the external outflow port (81) are
The outlet (51) and the external inlet (80) communicate with one space in the storage part (4a) divided by the partition plate (48).
It communicates with the other space in the storage part (4a), and in the space in each of the storage part (4a), the upper wall surface ( An upper rib (42) extending from the lower wall surface (41) toward the lower wall surface (41) and forming a lower opening (45) with the lower wall surface (41). And a lower rib (43) extending toward the upper wall (40) and forming an upper opening (44) between the lower rib (43) and the inlet (50) in order from the upper rib (42). The side opening (4
9), a plurality of sets are provided toward the outlet (51) side, and the next upper rib (42) is attached from the lower opening (45) via the upper opening (44). The volume of the space formed up to the root and the space formed from the upper opening (44) to the base of the next lower rib (43) via the lower opening (45). Is smaller than the volume of the temperature boundary layer of the hot-water supply fluid formed in the storage part (4a) when the upper rib (42) and the lower rib (43) are not provided. A tank for a water heater. 5. The inflow port (50) and the external outflow port (81) are provided on one upper side of the one side wall surface (46) partitioned by the partition plate (48). 51) and said external inlet (80)
The side wall surface (46, 47) is provided below the other of the one side wall surface (46) partitioned by the partition plate (48), and each of the side wall surfaces (46, 47) is a longitudinal end side of the storage part (4a). The water heater tank according to claim 4, wherein: 6. When the hot water supply fluid flows from the inflow port (50) to the outflow port (51), the lower opening (4) is closed.
The volume formed between the upper opening (44) and the adjacent upper opening (44) is smaller than the volume formed between the upper opening (44) and the adjacent lower opening (45). The hot water supply tank according to claim 4 or claim 5, wherein 7. Hot water supply water is exchanged by heat exchange between a water storage tank (4) for storing a heat storage fluid heated by a heating means (2) and a heat storage fluid flowing out of the water heater tank (4). An indirect hot-water supply type water heater having a heat exchanger (6) for heating, wherein the water heater tank (4) includes the water heater tank according to any one of claims 1 to 6, and the water heater tank ( 4) An indirect hot water supply unit characterized by being integrally molded with resin. 8. The water heater tank (4), wherein the upper rib (42) and the lower rib (43) are formed hollow, and a heat insulating material (15) is provided inside the hollow. The indirect hot water supply device according to claim 7.