JP4137878B2 - Hot water heater - Google Patents

Description

  The present invention relates to a hot water heater that circulates hot water heated by a heat exchanger to a heating radiator.

  As this type of hot water heater, for example, there is one in which a heat exchanging circuit that circulates hot water in a heat exchanger and a heating radiating circuit that circulates hot water in a heating radiator are connected via a systern (see Patent Document 1). ). As shown in FIG. 5, this hot water heater is provided with a forward passage 91 and a return passage 92 of a heat exchange circuit 90 </ b> A for circulating hot water to a heat exchanger 97 in a cistern 90 formed of a casing capable of storing hot water therein. And a forward passage 93 and a return passage 94 of a heating circuit 90B for circulating hot water to the heating radiator 98 are connected. Circulation pumps 95 and 96 are provided in the forward passage 91 of the heat exchange circuit 90A and the forward passage 93 of the heating circuit 90B, respectively. The cistern 90 is filled with a required amount of hot water, and this hot water circulates in the heat exchange circuit 90A from the forward passage 91 and is heated by the heat exchanger 97 in the middle of the cistern 90 to enter the cistern 90 from the return passage 92. The heated hot water circulates in the heating circuit 90 </ b> B from the outgoing passage 93 and radiates heat in the heating radiator 98 on the way to heat the room and the like, and returns from the return passage 94 into the systern 90. The circulation of the hot water in the heat exchange circuit 90A and the circulation of the hot water in the heating circuit 90B are performed continuously and in parallel through the cistern 90, so that the room or the like in which the heating radiator 98 is installed is heated. The

In this hot water heater, the circulation flow rates of the circuits 90A and 90B can be individually set by providing the circulation pumps 95 and 96 in the heat exchange circuit 90A and the heating circuit 90B, respectively. Therefore, heat exchange is performed in the heat exchange circuit 90A. Considering the pressure resistance and durability of the heater 97, the circulation flow rate is set to be relatively small, and the heating circuit 90B has an advantage that the circulation flow rate can be set to be large according to the number of heating radiators 98. Further, in this hot water heater, since the cis-turn 90 is provided in the hot water circulation path constituted by the heat exchange circuit 90A and the heating circuit 90B, bubbles generated and circulated in the circuits 90A and 90B are captured by the cis-turn 90. Air can be extracted from the circuits 90A and 90B.
Japanese Patent Application No. 2004-247147

By the way, the high temperature hot water heated by the heat exchanger 97 is returned from the return passage 92 of the heat exchange circuit 90A to the systern 90, and the low temperature radiated by the heating radiator from the return passage 94 of the heating circuit 90B. These warm waters are mixed in the cistern 90. For this reason, the hot water heated by the heat exchanger 97 in the cis turn 90 is mixed with the low temperature hot water returned from the return passage 94 and its temperature is lowered, so the thermal efficiency is not necessarily good. .
On the other hand, when the circulation flow rate of the heating circuit 90B is increased, the hot water returning from the return passage 94 to the cistern 90 is spouted from the water surface in the cistern 90 to generate bubbles, and the evacuation in the cistern 90 is incomplete. Therefore, it may be circulated to the heat exchange circuit 90A side and the heating circuit 90B side.
The present invention has been made in view of the above circumstances, in a hot water heater in which a heat exchange circuit that circulates hot water in a heat exchanger and a heating circuit that circulates hot water in a heating radiator are connected via a systern. , Realization of a hot water heater with measures to improve the heat efficiency while suppressing the hot water heated by the heat exchanger from being mixed with the hot water on the heating circuit side in the cis turn and improving the venting action in the cis turn Is an issue.

(1) A hot water heater according to the present invention is a hot water heater in which a heat exchange circuit that circulates hot water in a heat exchanger and a heating circuit that circulates hot water in a heating radiator are connected via a systern. The return passage port of the exchange circuit and the forward passage port of the heating circuit are connected to one side of the cistern, and the forward passage port of the heat exchange circuit and the return passage port of the heating circuit are connected to the other side of the cistern. The systern is provided with a partition plate for guiding hot water from the return passage port of the heat exchange circuit to the forward passage port of the heating circuit, and the flow of hot water returning from the return passage port of the heating circuit into the systern suppressing shield plate is provided, said cistern is composed of a first space occupied most of the internal space, a second space formed in communication with the first space on the other side in the first space The return passage port of the heat exchange circuit and the forward passage port of the heating circuit are provided in the first space, and the forward passage port of the heat exchange circuit and the return passage port of the heating circuit are provided in the second space. The shielding plate is provided at the boundary between the first space and the second space .
From the above configuration, hot water from the return passage port of the heat exchange circuit is likely to flow into the forward passage port of the heating circuit on one side of the cistern, and from the return passage port of the heating circuit on the other side of the cistern. It becomes easy for low temperature warm water to flow into the forward passage port of the heat exchange circuit. Thereby, it can suppress that warm water distribute | circulates between the one side and the other side in a cistern.
And while suppressing a lot of high temperature hot water heated by the heat exchanger by the partition plate from flowing into the forward passage of the heating circuit and mixing with the low temperature hot water from the heating circuit side in the systern, The flow rate of the warm water returning from the return passage port of the heating circuit into the cistern can be suppressed by the shielding plate.
In addition, by providing the first space and the second space, the hot water heated by the heat exchanger is prevented from being mixed with the low-temperature hot water on the heating circuit side in the cistern as well as the partition plate. It is also exerted remarkably by the spatial action of the cistern and the shielding plate. Furthermore, by connecting the return passage port of the heating circuit to the second space having a relatively small volume, the flow rate of the hot water can be reliably suppressed by the shielding plate.

(2) The partition plate is a flat plate formed upright from the inner wall of the cistern, and the height from the inner wall of the cistern is such that the return passage port of the heat exchange circuit and the heating circuit go forward. The lateral width that is higher than the height of any connection position of the passage opening and parallel to the inner wall of the cistern is set to the length from the vicinity of the return passage opening of the heat exchange circuit to the vicinity of the forward passage opening of the heating circuit. Also good.
Thereby, when the hot water is guided from the return passage port of the heat exchange circuit to the forward passage port of the heating circuit, it is possible to suppress the flow of the hot water from one side to the other side in the systern.

(3) In addition, the partition plate includes an upright portion that rises from the inner wall of the cistern to which the return passage port of the heat exchange circuit or the forward passage port of the heating circuit is connected, and the upright portion of the heat exchange circuit. You may provide the collar part extended in the return passage port side and the going-out passage port side of the said heating circuit.
Thereby, the flow of the warm water which goes to the upper end side of a partition plate along a standing part can be prevented.

(4) Moreover, the said shielding board may be provided with the slit.
As a result, the warm water returning from the return passage port of the heating circuit into the cistern collides with the shielding plate, and part of the warm water escapes from the slit, so that the flow rate of the warm water can be moderately suppressed.

(5) Moreover, the slit of the said shielding board may be extended and formed in the direction which cross | intersects the direction which goes to the going-out passage port of the said heating circuit from this shielding board.
Thereby, the hot water flowing out from the slit is guided in a direction crossing the direction toward the forward passage opening of the heating circuit.

(1) As described above, according to the hot water heater according to the present invention, it is possible to suppress the warm water from flowing between one side and the other side in the cistern. And since the hot hot water heated by the heat exchanger by the partition plate is prevented from mixing with the low-temperature hot water on the heating circuit side in the cistern, the thermal efficiency and heating capacity of the hot water heater can be improved. it can. Moreover, since the flow rate of the hot water flowing into the cistern from the heating circuit is suppressed by the shielding plate and it does not blow out vigorously in the cistern, mixing of the hot water in the cistern is prevented and the venting action in the cistern is prevented. Can be improved. Further, by constituting the cistern from the first space and the second space, the effect of preventing the hot water heated by the heat exchanger from being mixed with the cold hot water on the heating circuit side in the cistern. Further, the effect of suppressing the flow rate of the warm water returning from the return passage port of the heating circuit into the systern can be further improved.

(2) The partition plate is a flat plate formed upright from the inner wall of the cistern, and the height from the inner wall of the cistern is such that the return passage port of the heat exchange circuit and the heating circuit go forward. The lateral width that is higher than the height of any connection position of the passage opening and parallel to the inner wall of the cistern is set to the length from the vicinity of the return passage opening of the heat exchange circuit to the vicinity of the forward passage opening of the heating circuit. Thus, it is possible to suppress the flow of hot water between one side and the other side of the cistern, and more reliably guide most of the hot water flowing from the return passage port of the heat exchange circuit to the forward passage port of the heating circuit.

(3) In addition, the partition plate includes an upright portion that rises from the inner wall of the cistern to which the return passage port of the heat exchange circuit or the forward passage port of the heating circuit is connected, and the upright portion of the heat exchange circuit. Since it is possible to prevent the flow of hot water toward the upper end side of the partition plate along the standing portion by providing the return passage port side and the eaves portion extended to the forward passage port side of the heating circuit, This prevents the mixing of the hot water in the cistern and the mixing of the hot water more reliably.

(4) Also, by providing a slit in the shielding plate, the flow rate of the warm water returning from the return passage port of the heating circuit into the cistern can be moderately suppressed. The venting action of can be further improved.

(5) Moreover, the slit of the said shielding board is extended and formed in the direction which cross | intersects the direction which goes to the going-out passage opening of the said heating circuit from this shielding board, and the hot water which flows out from a slit is made into the going-out passage opening of a heating circuit. Since it is induced in a direction intersecting with the direction of heading, it is possible to more reliably suppress the warm water from flowing into the heating circuit side.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows the configuration of a hot water heater according to an embodiment of the present invention. The hot water heater 1 shown in FIG. 1 is connected to the heat exchange circuit 3 and the heating circuit 4 through the cistern 2 so that the hot water can be circulated, and the hot water heated while circulating through the heat exchange circuit 3 is converted into the cistern 2. The hot water flows through the heating circuit 4 and circulates, and while the hot water circulates through the heating circuit 4, heating by heat radiation is performed and returned to the systern 2. The heating of the warm water by the heat exchange circuit 3 and the heat radiation of the warm water by the heating circuit 4 are continuously performed, whereby the room or the like is heated.
The heat exchange circuit 3 includes a heat exchanger 30 for heating hot water, a forward passage 31 from the cis turn 2 to the heat exchanger 30, a return passage 32 from the heat exchanger 30 to the cis turn 2, and hot water to the circuit 3 And a circulation pump (first circulation pump) 33 for circulation in the interior.

  The heat exchanger 30 is housed in a combustion chamber 35 together with a burner 34, fuel gas is supplied to the burner 34 through a gas passage 36, and combustion air is supplied to the combustion chamber 35 by a combustion fan 37. The The heat exchanger 30 includes a main heat exchanger 30a disposed immediately above the burner 34, and a sub heat exchanger 30b disposed in an exhaust passage through which combustion exhaust gas that has passed through the main heat exchanger 30a flows. The main heat exchanger 30a and the sub heat exchanger 30b are connected in series with water passages. In the main heat exchanger 30a, the sensible heat of the combustion exhaust from the burner 34 is recovered and the hot water is heated, and in the auxiliary heat exchanger 30b on the upstream side in the water passage, latent heat due to condensation of water vapor in the combustion exhaust is recovered. Hot water is heated.

The forward passage 31 of the heat exchange circuit 3 is connected between the cistern 2 and the auxiliary heat exchanger 30b, while the return passage 32 is connected between the main heat exchanger 30a and the cistern 2. Yes. The hot water flowing from the cistern 2 into the outgoing passage 31 by the circulation pump 33 sequentially collects latent heat and sensible heat from the combustion exhaust of the burner 34 while passing through the auxiliary heat exchanger 30b and the main heat exchanger 30a. And is returned to the cistern 2 from the return passage 32. As the circulation pump 33, a known pump such as a variable flow rate pump driven by a DC motor can be used.
The heating circuit 4 is installed in a room or the like to heat the heating radiator 40, the forward passage 41 from the cistern 2 to the heating radiator 40, the return passage 42 from the heating radiator 40 to the cistern 2, and hot water. It comprises a circulation pump (second circulation pump) 43 for circulation in the circuit 4.

The heating radiator 40 performs heating by heat radiation such as a floor heating panel or an air conditioner, and a plurality of heating radiators 40 are provided in parallel to the heating circuit 4 according to the number of rooms to be heated. It is done. Note that the number of heating radiators 40 may be one, or may be provided in series with the heating circuit 4.
The forward passage 41 of the heating circuit 4 is connected between the cistern 2 and the upstream side of each heating radiator 40, while the return passage 42 is between the downstream side of each heating radiator 40 and the cistern 2. It is connected to. Then, the hot water flowing into the outgoing passage 41 from the cistern 2 by the circulation pump 43 is radiated in each heating radiator 40 to heat each room, and is returned into the cistern 2 from the return passage 42. The circulation pump 43 can be a known pump as with the circulation pump 33.

Next, the configuration of the systern 2 will be described.
As shown in FIG. 1, the cistern 2 is formed of a hollow housing that can store hot water therein, and water is supplied into the cistern 2 through a water supply pipe 22 provided with a water refill valve 21. The cistern 2 is provided with two water level electrodes 23a and 23b for detecting the low water level and the high water level, respectively, so that when the water level in the cistern 2 is detected to be lower than the low water level, the refill valve 21 is provided. The water is replenished until the water level in the cistern 2 is detected as being higher than the high water level. Further, the cistern 2 is provided with an overflow pipe 24 for discharging hot water in the cistern 2 when the water level exceeds a predetermined upper limit level.

FIG. 2 shows a configuration in the systern 2. In FIG. 2, the water refill valve 21, the water supply pipe 22, and the water level electrodes 23a and 23b are omitted. As shown in FIG. 2, the inside of the cistern 2 is formed in a substantially rectangular parallelepiped first space 2 a that occupies most of the internal space, and the first space 2 a is communicated with the first space 2 a at one corner of the lower four corners. 2 spaces 2b. In other words, this cistern 2 has a shape in which two rectangular parallelepipeds of a large-capacity rectangular parallelepiped and a small-capacity rectangular parallelepiped formed at one corner of the lower four corners are combined so that each internal space is a single space. is there.
On one side of the cistern 2, that is, on the right side in FIG. 2 of the first space 2a, there is a return passage port 32a that is an open end of the return passage 32 of the heat exchange circuit 3, and an outgoing passage 41 of the heating circuit 4. The forward passage opening 41a which is an open end is connected. The return passage port 32 a in the heat exchange circuit 3 is provided on the side surface of the cistern 2, and the forward passage port 41 a of the heating circuit 4 is provided on the bottom surface of the cistern 2.

On the other hand, in the second space 2b provided on the other side of the cistern 2, that is, on the left side in FIG. 2 of the first space 2a, a forward passage port 31a that is an open end of the forward passage 31 of the heat exchange circuit 3, and a heating A return passage opening 42a which is an open end of the return passage 42 of the circuit 4 is connected. The forward passage port 31a in the heat exchange circuit 3 is provided on the side surface of the second space 2b, and the return passage port 42a of the heating circuit 4 is provided on the bottom surface of the second space 2b.
In this way, the forward passage 31 and the return passage 32 of the heat exchange circuit 3 and the forward passage 41 and the return passage 42 of the heating circuit 4 are connected to the cistern 2, and the both circuits 3 and 4 are connected via the cistern 2. Hot water can be circulated.

  Further, the systern 2 is provided with a partition plate 25 on one side (the right side in FIG. 2) where the return passage port 32a and the forward passage port 41a are provided in the first space 2a. The partition plate 25 is provided so as to stand up from the inner wall of the cistern 2 serving as the bottom surface of the first space 2a, and is formed in a square shape that is bent near the center in the horizontal width direction. The partition plate 25 is set such that the height from the inner wall (bottom surface) of the cistern 2 is higher than the height of either the return passage port 32a or the forward passage port 41a. ) Is set such that both ends thereof are close to the return passage port 32a and the forward passage port 41a from the vicinity of the return passage port 32a to the vicinity of the forward passage port 41a.

In addition, the cistern 2 is provided with a flat shielding plate 26 so as to close most of the boundary between the first space 2a and the second space 2b. A plurality of slits 26 a extending from the second space 2 b in a direction intersecting with the direction toward the forward passage port 41 a of the heating circuit 4 are formed in the shielding plate 26 at predetermined intervals. Further, gaps C and D are appropriately provided at the periphery of the shielding plate 26 and are fixed to the inner wall of the cistern 2 so as to allow the warm water flowing in from the return passage port 42a of the heating circuit 4 to escape to the first space 2a side. .
Further, the gap C in the forward passage port 41a side of the shielding plate 26, that is, the one side direction of the cistern 2 is arranged to be wider than the other gaps D. As a result, the momentum of the hot water flowing out from the gap C to the first space 2a becomes strong, and the so-called wall prevents the hot water from flowing between the one side and the other side of the first space 2a. It is also possible to fulfill the role of The shielding plate 26 may be fixed to the inner wall of the cistern 2 at any position on the periphery thereof, and the fixing method may be any fixing method such as engagement with a groove or hooking with a hook or the like. Can be adopted.

Next, the flow of hot water in the cistern 2 will be described.
As shown in FIG. 2, the return passage port 32a of the heat exchange circuit 3 and the forward passage port 41a of the heating circuit 4 are connected to one side of the first space 2a of the cistern 2, and the heat exchange circuit 3 and the return passage port 42a of the heating circuit 4 are connected to a second space 2b provided on the other side of the first space 2a of the cistern 2. As a result, on one side of the first space 2a of the cistern 2, high-temperature hot water from the return passage port 32a of the heat exchange circuit 3 tends to flow into the forward passage port 41a of the heating circuit 4, and the first In the second space 2b on the other side of the space 2a, low-temperature hot water from the return passage port 42a of the heating circuit 4 easily flows into the forward passage port 31a of the heat exchange circuit 3. Therefore, it is possible to suppress the warm water from flowing between one side and the other side in the cistern 2.

  Further, hot hot water flowing into the cistern 2 from the return passage port 32 a of the heat exchange circuit 3 flows along the partition plate 25 and flows into the forward passage port 41 a of the heating circuit 4. This hot water is mixed with the hot water stored in the cistern 2 and tries to diffuse, and also because it is hotter than the hot water in the cistern 2, it tries to rise by convection, but from the return passage port 32a. The flow is guided to the forward passage port 41a by the partition plate 25, and the flow of hot water in the cistern 2 is obstructed by the partition plate 25 at the height of the return passage port 32a and the forward passage port 41a. Thereby, mixing with the hot hot water which flowed in from the return passage port 32a and the cold hot water in the cistern 2 is suppressed. Therefore, most of the hot water heated by the heat exchange circuit 3 can be directly supplied to the heating circuit 4. Further, when the bubbles generated in the heat exchange circuit 3 flow into the cistern 2 together with the hot water, the bubbles can be captured and evacuated in the cistern 2.

  Moreover, it is suppressed that the low temperature warm water which flows in into the 2nd space 2b of the cistern 2 from the return passage port 42a of the heating circuit 4 collides with the shielding board 26, and flows into the 1st space 2a side vigorously. As a result, most of the low-temperature hot water from the return passage port 42 a flowing into the second space 2 b flows into the forward passage port 31 a of the heat exchange circuit 3. Therefore, most of the low-temperature hot water radiated for heating in the heating circuit 4 can be directly supplied to the heat exchange circuit 3. Further, when bubbles generated in the heating circuit 4 flow into the cistern 2 together with the low-temperature hot water, the bubbles enter the first space 2a through the slits 26a and the peripheral edges C and D of the shielding plate 26 and are captured in the cistern 2. Can be evacuated.

  The internal space of the cistern 2 is composed of a first space 2a having a large volume and a second space 2b having a small volume. The return space 42a of the heating circuit 4 and the heat exchange circuit 3 are connected to the second space 2b. By providing the roadway 31a, the prevention of mixing of hot and cold hot water in the cistern 2 is remarkably exhibited not only by the partition plate 25 but also by the spatial action of the cistern 2 and the shielding plate 26. . Further, by providing the return passage port 42a of the heating circuit 4 in the second space 2b having a small volume, the shielding plate 26 having a good shielding property can be realized with a flat plate member having a small area, and the fixing or the like is facilitated.

  Further, the low-temperature hot water that has not flowed into the forward passage port 31a of the heat exchange circuit 3 flows into the first space 2a from the slit 26a of the shielding plate 26 or the gaps C and D around the shielding plate 26, but the shielding plate 26 By suppressing the momentum of the flow of hot water from the return passage port 42a, the inflow route to the first space 2a is dispersed by the slits 26a and the gaps C and D at the periphery of the shielding plate 26, thereby allowing the return passage port 42a to The flow rate of the warm water returning into the cistern 2 can be moderately suppressed. Therefore, even if the circulation flow rate of the heating circuit 4 is increased, the hot water flowing into the cistern 2 from the return passage port 42a does not spout out onto the water surface in the cistern 2, and the evacuation action of the cistern 2 is achieved. It can be demonstrated reliably.

Moreover, since the said slit 26a is extended and formed in the direction which cross | intersects the direction which goes to the going-out passage port 41a of the heating circuit 4 from the shielding board 26, it passes through the slit 26a and flows into the 1st space 2a. As shown in FIG. 2, the flow of water does not flow toward the forward passage port 41a, and the warm water flows in a circulating manner on the left side of the first space 2a where the forward passage port 41a is not provided. As a result, the flow from the upper side of the partition plate 25 toward the forward passage port 41a is less likely to occur, and the low-temperature hot water flowing from the return passage port 42a of the heating circuit 4 again flows into the heating circuit 4 from the forward passage port 41a. Can be suppressed.
Further, if the gap C on the forward passage opening 41a side of the shielding plate 26 is made wider than the other gaps D, the momentum of the hot water flowing out from the gap C to the first space 2a becomes strong, and this hot water The reflux serves as a wall that hinders the flow of hot water between one side and the other side of the first space 2a.

Thus, according to the hot water heater 1 according to the present embodiment, the heated hot water and the cold hot water are prevented from being mixed in the cistern 2, and the thermal efficiency and heating capacity of the hot water heater can be reduced. In addition to being able to improve, even when the circulation flow rate of the heating circuit 4 is large, it is possible to prevent the hot water from being ejected vigorously from the water surface in the cistern 2 and to ensure that the evacuation effect of the cistern 2 is exhibited. Can do.
In addition, the hot water heater according to the present invention is not limited to the above embodiment, and various design changes can be made within the scope of the present invention. For example, the following changes can be made.

(1) FIG. 3 is a modification of the partition plate 25. The partition plate 27 according to this modification includes an upright portion 27a that rises from the inner wall of the cistern 2 that is the bottom surface of the first space 2a, and the return passage port 32a of the heat exchange circuit 3 and the heating circuit 4 from the upper end of the upright portion 27a. And a flange portion 27b extending toward the outgoing passage port 41a. The standing portion 27a has the same size and shape as the partition plate 25 shown in FIG. 2, and the collar portion 27b extends from the entire upper end of the standing portion 27a toward the side where the return passage port 32a and the forward passage port 41a are provided. It is a flat plate extending substantially horizontally.
By providing such a flange portion 27b, the hot water that is guided to the standing portion 27a and flows from the return passage port 32a to the outgoing passage port 41a rises along the rising portion 27a, and the hot water in the cistern 2 It is possible to suppress the flow of convection that tends to rise upward due to the temperature difference. Therefore, the mixing effect of hot water in the cistern 2 by the partition plate 27 and the guide effect of hot water from the return passage port 32a of the heat exchange circuit 3 to the forward passage port 41a of the heating circuit 4 can be further exhibited.
Note that the open end side of the collar portion 27b may be slightly inclined upward. Thereby, bubbles do not accumulate on the lower side of the flange portion 27b.

(2) FIG. 4 shows a modification of the shielding plate 26. The shielding plate 28 according to this modification is a flat plate like the shielding plate 26, but a plurality of slits 28a having a predetermined interval are located at the boundary between the first space 2a and the second space 2b. It extends from the plate 28 in the direction toward the forward passage port 41a of the heating circuit 4. For example, as shown in FIG. 3, when the partition plate 27 having the flange portion 27 b is provided in the cistern 2, the partition plate 27 allows the return passage port 32 a of the heat exchange circuit 3 to go to the forward passage port of the heating circuit 4. Since the warm water guided to 41a is not easily affected by the warm water flowing out from the slit 28a, a degree of freedom is generated in the direction of the slit 28a. Also, depending on the shape of the internal space of the cistern 2, the degree of freedom can be similarly given in the direction of the slit 28a.

(3) In addition, in the above embodiment, the return passage port 32a of the heat exchange circuit 3 and the forward passage port 41a of the heating circuit 4 are provided on the right side of the cis turn 2 in FIG. The return passage port 31a of the heat exchange circuit 3 and the return passage port 42a of the heating circuit 4 are provided, but the positional relationship between the return passage port 32a and the forward passage port 41a and the forward passage port 31a and the return passage port 42a is as follows. As long as it is relatively one side and the other side of the cistern 2, for example, the left and right sides may be interchanged, or the front side and the back side, or the upper side and the lower side may be arranged.
Further, the position, size (height, width, etc.), shape, etc. of the partition plate 25 are also appropriately determined in accordance with the positional relationship between the return passage port 32a and the forward passage port 41a and the forward passage port 31a and the return passage port 42a. Can be changed.
Further, the position and size of the shielding plate 26 and the size and number of the slits 26a can be changed as appropriate.

It is a lineblock diagram showing the whole hot-water supply heater composition by an embodiment of the invention. It is a block diagram which shows the internal structure of a cistern. It is a block diagram which shows the modification of the partition plate provided in the cistern. It is a block diagram which shows the modification of the shielding board provided in the cistern. It is a schematic diagram which shows the structure of the cistern in the conventional hot water heater.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot-water supply heater 2 Systurn 3 Heat exchange circuit 4 Heating circuit 25, 27 Partition plate 26, 28 Shielding plate 26a, 28a Slit 27a Standing part 27b Hook part 30 Heat exchanger 31a Outward passage port 32a Return passage port 33 Circulation pump (first 1 circulation pump)
43 Circulation pump (second circulation pump)
40 Heating radiator 41a Outward passage port 42a Return passage port

Claims (5)

In a hot water heater where a heat exchange circuit that circulates hot water to a heat exchanger and a heating circuit that circulates hot water to a heating radiator are connected via a systern,
The return passage port of the heat exchange circuit and the forward passage port of the heating circuit are connected to one side of the cistern, and the forward passage port of the heat exchange circuit and the return passage port of the heating circuit are connected to the other side of the cistern. Connected to
The systern is provided with a partition plate for guiding hot water from the return passage port of the heat exchange circuit to the forward passage port of the heating circuit, and suppresses the flow of hot water returning from the return passage port of the heating circuit into the systern. A shielding plate is provided ,
The cistern is composed of a first space that occupies most of the internal space, and a second space formed in communication with the first space on the other side in the first space,
The return passage port of the heat exchange circuit and the forward passage port of the heating circuit are provided in the first space, and the forward passage port of the heat exchange circuit and the return passage port of the heating circuit are provided in the second space. A hot water heater provided with the shielding plate at the boundary between the first space and the second space . The hot water heater according to claim 1,
The partition plate is a flat plate formed upright from the inner wall of the cistern, and the height from the inner wall of the cistern is any of the return passage port of the heat exchange circuit and the forward passage port of the heating circuit. A hot water heater which has a width that is higher than the height of the connecting position and parallel to the inner wall of the cistern, and is set to a length extending from the vicinity of the return passage port of the heat exchange circuit to the vicinity of the forward passage port of the heating circuit. In the hot water heater according to claim 1 or 2,
The partition plate includes an upright portion rising from an inner wall of the cistern to which the return passage port of the heat exchange circuit or the forward passage port of the heating circuit is connected, and the return passage side of the heat exchange circuit from the upright portion, and A hot water heater provided with an eaves part extended to the forward passage opening side of the heating circuit. In the hot water heater according to any one of claims 1 to 3,
A hot-water heater with a slit provided in the shielding plate. In the hot water heater according to claim 4,
The slit of the said shielding board is a hot water heater heated and formed in the direction which cross | intersects the direction which goes to the going-out passage port of the said heating circuit from this shielding board.

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