JP2015210039A - Internal structure of hot water tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an internal structure of a hot water tank which can clarify a boundary temperature of high-low water temperature and can modify a conventional hot water tank to a hot water tank that can prevent uneven temperature of discharged hot water.SOLUTION: A hot water tank includes: a hot water outlet 2 provided above a tank side wall S so as to provide hot water for various use; a water supply inlet 3 provided below the tank side wall for supplying original low-temperature water; a hot water return port 6 provided above the side wall for returning the used hot water after the various use to a tank body; and an outward circulation port 4 and a return circulation port 5 provided respectively above and below the tank side wall S so as to return the low-temperature water settled in an inner lower part of the tank body to a heat exchange unit outside of the tank body, heat up and increase temperature of the water, and store and circulate the heated water in an inner upper part of the tank body. In an internal structure of the hot water tank, an opening of an inner side of the tank side wall of any one of the water supply inlet 3, the hot water return port 6, the outward circulation port 4 and the return circulation port 5 provided to the tank side is covered with rectification cases 11-14 which are vertically formed to have a substantially U-shaped cross section opened upwardly and downwardly.

Description

  The present invention relates to an internal structure of a hot water tank, and more particularly to an internal structure of a hot water tank that stores hot water.

Conventionally, bathtubs and currants that distribute circulating hot water are communicated with a hot water storage tank for storing a certain amount of hot water via a predetermined pipe. Raw water is stored in the bed so that hot water stays at the outlet.
Therefore, as disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-361073), a certain structure is installed inside the hot water tank to form a boundary layer between the hot water and the low temperature hot water of the raw water. doing.

JP 2004-361073 A

  In such a conventional hot water storage tank, a certain structure installed in the interior is composed of an upper rectifying cylinder disposed in the upper part of the tub, a lower rectifying cylinder disposed in the lower part of the tub, and a leading end opening communicating with these rectifying cylinders. Since the base end opening is composed of small diameter pipes communicating with various piping ports, the structure is complicated and the heat loss is much corresponding to that. However, the boundary layer of the high and low temperature hot water becomes unclear, and the hot water temperature tends to be uneven.

The hot water supply system consists of a heat exchange device (boiler) and a hot water storage tank, but the heat exchange device tends to become difficult to use due to the deterioration of use, but the hot water storage tank continues without deterioration. And remained in a usable state.
In addition, since the remaining hot water storage tank is of a conventional type and does not have the structure as described in Patent Document 1, the boundary layer of the high and low temperature hot water becomes unclear, and the disadvantage that unevenness in the hot water temperature is likely to occur. Had.
For this reason, the user needed to replace the hot water storage tank which has a structure which has a structure as described in the said patent document 1 with the said boiler simultaneously.

  The present invention has been made to solve the above-described problems, and provides a hot water tank internal structure that can be modified from a conventional hot water tank into a hot water tank in which the boundary layer of high and low temperature hot water becomes clear and the hot water temperature does not vary. The purpose is to do.

(1) The present invention provides a hot water outlet provided at the upper part of the tank peripheral wall for supplying hot water for various types of hot water use, and a water supply outlet provided at the lower part of the peripheral wall of the tank for feeding low temperature hot water of raw water. In order to return the remaining hot water after use of various types of hot water to the tank body, the hot water outlet provided at the upper part of the peripheral wall and the low temperature hot water settling in the lower layer inside the tank body are returned to the heat exchange equipment outside the tank body and heated to rise. In the hot water storage tank composed of the forward circulation port and the return circulation port respectively arranged at the upper and lower parts of the tank peripheral wall so as to be heated and stored in the upper layer inside the tank body for circulation, the hot water storage tank is disposed on the tank peripheral wall. That the opening on the inner wall of the tank peripheral wall of any one of the water supply port, the return hot water port, the forward circulation port and the return circulation port is covered with a vertical rectification case having a substantially U-shaped cross section or a substantially U-shaped cross section. It is intended to provide a hot water tank internal structure that is characterized.

(2) Further, in the invention described in (1) above, the hot water storage, wherein the opening on the inner side surface of the tank peripheral wall covering the rectifying case is a water supply port, a hot water return port, an outward circulation port, and a return circulation port It is intended to provide a tank internal structure.

(3) Further, in the invention described in (1) or (2), the end plate portion rectifying case is formed in a state corresponding to the end plate portion formed on the rim of the tank body ceiling at the upper surface opening portion of the rectifying case covering the hot water outlet. It is intended to provide a hot water tank internal structure that is characterized by being provided in series.

(4) Further, in the invention described in (3) above, the end plate rectification case connected to the upper opening of the rectification case opened up and down so as to correspond to the end plate portion in which the tank body ceiling is formed in a curved shape. Instead, a hot water tank internal structure characterized by providing a plate-like end plate rectifying plate in a row is provided.

(5) In the invention according to any one of (1) to (4), the rectifying pipes are respectively connected to the rectifying cases covering the water supply port and the return circulation port, and the tip of each rectifying pipe has a base end It is intended to provide an internal structure of a hot water tank characterized by being supported on a support leg that penetrates the bottom of the tank body in a state of being positioned further downward.

According to the first aspect of the present invention, in the hot water storage tank, a cross section in which the opening on the inner side surface of the tank peripheral wall of any one of the water supply port, the hot water return port, the forward circulation port and the return circulation port disposed on the peripheral wall is opened up and down. By covering with a substantially straight U-shaped flow straightening case, a flow straightening case is introduced on the ceiling in the tank body or in the vicinity thereof to guide the hot water injected from the water return port to the ceiling of the tank body while decelerating. There is a rectification case that guides the raw water supplied from the water supply port to the bottom of the tank body while decelerating it at or near the bottom of the tank body, so that stirring and convection occur in the hot water storage tank. As much as possible, the injected hot water is sequentially stacked from the ceiling to the bottom of the hot water tank, i.e., stored while maintaining the interface with the raw water, and from the water inlet to the inside. The supplied raw water will cause agitation and convection in the hot water tank. Is as much as possible prevented, the raw water supplied to the inside, have the effect of maintained without stay at the bottom of the tank body, disturbed interface between the raw water Metropolitan water.
Accordingly, most of the area in the hot water tank can be used as hot water, and a large amount of hot water having an effective temperature can be stored in the hot water tank having the same volume as the conventional one.

  In addition, since it is configured to be covered with a vertical rectification case with an approximately U-shaped cross-section with the opening of the water supply opening etc. open and closed, a boundary layer of high and low temperature hot water can be attached by attaching the rectification case to an existing hot water tank. Becomes clear and can be modified to a hot water storage tank that does not cause unevenness in the hot water temperature.

  That is, in a hot water supply system that combines a heat exchange device (boiler) and a hot water storage tank, a plurality of rectification cases are retrofitted to the hot water storage tank that remains in a usable state without deterioration of use. As a result, it has the effect of being able to be used continuously with the above performance improved.

  According to invention of Claim 2, since the opening part of the tank surrounding wall inner surface which coat | covers a rectification | straightening case is a water supply port, a return hot water port, an outward circulation port, and a return circulation port, a water supply port, a return hot water port, an outward circulation When flowing into each opening of the outlet and the return circulation port, the flow velocity is reduced and the flow becomes a gentle flow and is led to the ceiling in the hot water tank. Similarly, the raw water supplied from the water supply pipe is the lower rectifying member. If it flows in, the flow velocity will be reduced, and it will have the effect of becoming a gentle flow and being led to the bottom part in a hot water storage tank.

  According to the invention described in claim 3, since the end plate rectification case is connected to the upper surface open portion of the rectification case covering the hot water outlet so as to correspond to the end plate portion formed on the rim of the tank body ceiling, each hot water storage tank The end plate rectification case can be installed according to the shape of the ceiling of the tank body, and the effect of being able to supply hot water and water to the ceiling of the tank body or the lower part of the tank body with as little stirring and convection as possible Have.

  According to the fourth aspect of the present invention, instead of the end plate rectification case connected to the upper opening of the rectification case opened up and down so as to correspond to the end plate portion in which the tank body ceiling is formed in a curved shape, a plate shape is provided. Since the end plate rectifying plate is continuously provided, the structure of the rectifying member is simplified, the installation space of the rectifying member is reduced as much as possible on the ceiling side of the tank body, and the tank body has a curved shape along the ceiling. It has the effect that it can be arranged with a shape.

According to the fifth aspect of the present invention, the rectifying pipes are respectively connected to the rectifying cases covering the water supply port and the return circulation port, and the tip of each rectifying pipe is located below the base end of the tank body. Since it was carried on the supporting leg portion that penetrated the bottom portion, a structure similar to the lower structure of the hot water tank described in Patent Document 1 can be obtained.
Moreover, an existing member can be used as the rectifying pipe. For example, by using a stainless steel pipe or the like constituting the air conditioning duct, there is an effect that the cost of parts required for the hot water storage tank can be reduced.

It is a hot water tank piping system figure which has the internal structure of the hot water tank internal structure in Example 1 of this invention. It is a top view of the hot water storage tank in Example 1 of the present invention. It is a section explanatory view of the hot water tank in Example 1 of the present invention. It is a partial cross section explanatory view of the hot water tank in Example 1 of the present invention. It is a perspective explanatory view showing each structure of a rectification case in Example 1 of the present invention. It is assembly explanatory drawing of the rectification | straightening case in Example 1 of this invention. It is explanatory drawing explaining the temperature change of the stored water in the hot water storage tank at the time of supplying hot water in the hot water storage tank in Example 1 of this invention exceeding the heating capability of a heater. It is a perspective explanatory view of the rectification case in Examples 2-3 of the present invention.

  This invention includes a hot water outlet provided at the upper part of the tank peripheral wall for supplying hot water for various types of hot water use, a water supply port provided at the lower part of the peripheral wall of the tank for supplying low-temperature hot water of raw water, and various types of hot water In order to return the remaining hot water after use to the tank body, the hot water outlet arranged in the upper part of the peripheral wall and the low-temperature hot water that has settled in the lower layer inside the tank body are returned to the heat exchange equipment outside the tank body and heated to raise the temperature. In a hot water storage tank comprising a forward circulation port and a return circulation port respectively arranged at the upper and lower parts of the tank peripheral wall so as to store and circulate hot water into the upper layer inside the main body, a water supply port and return pipe disposed on the tank peripheral wall We do not provide the internal structure of the hot water storage tank, characterized in that the opening on the inner wall of the tank peripheral wall of either the gate, the forward circulation port, or the return circulation port is covered with a vertical rectification case with a substantially U-shaped cross section that is open up and down. It is what.

In this way, a rectification case is disposed on or near the ceiling in the tank body so that the hot water injected from the return circulation port is led to the ceiling of the tank body while decelerating. Is gently guided to the ceiling in the tank body by the rectification case and stored there.
Therefore, stirring and convection are prevented as much as possible in the hot water tank, and the injected hot water is sequentially stacked from the ceiling to the bottom of the hot water tank, that is, in a state where the interface with the raw water is maintained. Go stored in.

On the other hand, at the bottom of the tank body or in the vicinity thereof, a rectifying case that guides the raw water supplied from the water supply port to the bottom of the tank main body while decelerating is disposed at the water supply port, and the raw water supplied to the inside from the water supply port Is gently guided to the bottom of the tank body and stored there by the rectification case of the water supply port.
Therefore, as in the case of the rectification case at the return circulation port, stirring and convection are prevented as much as possible in the hot water storage tank, and the raw water supplied to the inside stays at the bottom of the tank main body, The interface with is kept undisturbed.

As a result, most of the area in the hot water tank can be used as hot water, and even in a hot water tank of the same capacity as the conventional one, it is possible to store a large amount of hot water at an effective temperature, thereby reducing the hot water tank of a smaller capacity. Can be used effectively.
Therefore, it is possible to reduce the cost of parts required for the hot water tank and to install in a narrower installation space.

In addition, the cross-sectional area of the flow path in the rectifying case arranged in the hot water storage tank is larger than the cross-sectional area of the piping port (the cross-sectional area of the hot water flow channel injected from the forward circulation port or the return hot water port), thereby When the hot water injected from the mouth flows into the rectifying case, the flow velocity is reduced, and the hot water is led to the ceiling in the hot water storage tank as a gentle flow.
Similarly, the cross-sectional area of the flow path in the rectification case of the water supply port arranged in the hot water tank is larger than the cross-sectional area of the water supply port, and the flow rate of raw water supplied from the water supply port decreases when it flows into the rectification case. As a result, the flow becomes gentle and is led to the bottom of the hot water tank.

Further, in the present invention, the hot water injected from the forward circulation port is guided by the inner surface of the rectification case so that the traveling direction is changed to the ceiling, and the raw water supplied from the water supply port is the inner surface of the rectification case. And the traveling direction is changed to the bottom.
In this way, the hot water and the raw water are respectively guided to the inner surface of the rectifying case, and their directions are changed and guided to the ceiling and the bottom in the tank body, so that the flow rate is reduced and the hot water is further decelerated. And raw water is led to the ceiling and bottom in the tank body.

In the present invention, since the return circulation port is designed to take water from the flow path of the rectification case, a part of the raw water supplied from the water supply port to the flow path of the rectification case is taken as it is, The influence of agitation that the supply of raw water gives to the tank body is reduced.
In addition, by making the cross-sectional area of the return circulation port smaller than the cross-sectional area of the flow path of the rectifying case, water can be taken gently from inside the tank body, and the agitation that the water taken from inside the tank body gives to the tank body Can be reduced as much as possible.

By the way, a hot water outlet for returning the hot water supplied from the hot water outlet to the inside of the tank is provided in the tank main body, and the hot water returned from the hot water outlet of the tank main body is returned to the tank main body from the rectifying case. .
As a result, the hot water returned to the tank body is mixed with the hot water injected from the forward circulation port, the temperature difference is reduced, and then gently led to the ceiling inside the tank body. The influence of stirring and convection on the inside is reduced as much as possible.

Embodiment 1 of the present invention will be described below in detail with reference to the drawings.
FIG. 1 shows an overall explanatory diagram of a hot water tank 1 having a hot water tank internal structure of the present invention and a combination of peripheral devices and various pipes attached thereto.

In the hot water storage tank 1, one end of a water intake pipe 53 that takes water to raise the temperature of the stored water in the hot water storage tank 1 is disposed opposite to the connection position of the water supply pipe 50, and the other end of the water intake pipe 53 is It is connected to a water inlet of a heat exchange device 40 such as a non-pressure type or a decompression type.
A pump 41 that feeds the stored water in the hot water tank 1 to the heat exchange device 40 is interposed in the middle of the intake pipe 53.
The heat exchanging device 40 is provided with a water outlet for discharging hot water heated and heated, and one end of a pouring pipe 54 for injecting hot water into the hot water tank 1 is connected to the water outlet. .
The other end of the pouring pipe 54 is connected to the forward circulation port in the tank main body 10 a of the hot water storage tank 1 and in the vicinity of the tank main body ceiling 10 b, and an automatic air vent valve 61 is provided in the middle of the pouring pipe 54. Is intervening.
Thereby, a circulation path for heating and raising the temperature of the stored water in the hot water tank 1 is formed.

  A fuel pipe 46 for supplying gaseous or liquid fuel is connected to the heat exchange device 40 described above. In addition, a water supply pipe 50 is connected to the heat exchange device 40 through a valve, and raw water is supplied from the water supply pipe 50 into the heat exchange device 40 as necessary. Further, a drain pipe is connected to the heat exchange device 40 so that the internal water can be drained.

On the other hand, a hot water supply pipe 51 for supplying hot water stored in the hot water storage tank 1 to the place of use is connected to the hot water outlet 2 in the center of the tank body ceiling 10b of the hot water storage tank 1, and the hot water in the hot water storage tank 1 is It is discharged into the hot water supply pipe 51 by the internal pressure.
The hot water supply pipe 51 is connected to a plurality of branch pipes communicating with a faucet, a shower head or the like, and hot water flowing through the hot water supply pipe 51 is supplied to each branch pipe.
A branch pipe communicating with the water supply pipe 50 described above is also connected to each connecting part to which the faucet / shower head and the above-described branch pipes are connected, and it is necessary to mix hot water and raw water in each connecting part. The hot water of the temperature of can be used.

The hot water supply pipe 51 communicates with a hot water return pipe 52, and the hot water return pipe 52 communicates and is fixed to the hot water return port 6 of the hot water tank 1.
A hot water return pump is interposed in the middle of the hot water return pipe 52, and hot water in the hot water return pipe 52 is returned to the hot water storage tank 1 by the hot water return pump.
Thus, since the hot water in the hot water storage tank 1 is circulated by the hot water supply pipe 51 and the hot water return pipe 52, hot water with a temperature can be appropriately supplied to the aforementioned branch pipe.

By the way, one end of an expansion pipe 56 is connected to the tank body ceiling 10b of the hot water storage tank 1, and the other end of the expansion pipe 56 is separately connected to a sealed expansion tank 60 and a drain pipe via a trident connecting member. It is connected.
The hot water overflowed by the expansion due to the rise in the hot water temperature in the hot water tank 1 is temporarily stored in the expansion tank 60 through the expansion pipe 56. Further, a relief valve 62 is interposed in the middle of the expansion pipe 56, and the relief valve 62 is activated when the inside of the hot water storage tank 1 reaches a specified pressure so as to release the internal pressure.
On the other hand, as shown in FIG. 3, a temperature sensor 30 for detecting the temperature of the stored water is attached to the inner wall surface on the bottom 10 c side of the hot water tank 1, and heat exchange is performed based on the temperature detected by the temperature sensor 30. The device 40 is configured to operate and adjust the temperature.
If a plurality of temperature sensors 30 can be attached in the vertical direction (for example, the bottom 10c side and the top 10b side of the hot water tank 1), hot water can be stored at any sensor position.

FIG. 2 is a plan view of the hot water tank in the first embodiment of the present invention.
FIG. 3 is a cross-sectional explanatory view of the hot water storage tank in Example 1 of the present invention.
As shown in FIGS. 2 and 3, the hot water storage tank 1 is provided with a hot water outlet 2, a water supply port 3, a hot water return port 6, an outward circulation port 4, and a return circulation port 5 on the circumferential wall S thereof.
As shown in FIG. 2, the hot water outlet 2 is disposed in the upper portion of the peripheral wall of the tank in order to supply hot water to a hot water use device such as a bathtub or a currant.
The water supply port 3 is arrange | positioned in the tank surrounding wall lower part in order to feed the low temperature hot water of raw | natural water.
The hot water outlet 6 is disposed in the upper part of the tank peripheral wall (or in the middle part of the tank peripheral wall) in order to return the remaining hot water in the hot water using device to the tank main body 10a.
The forward circulation port 4 and the return circulation port 5 return the low temperature hot water containing raw water settling in the lower layer inside the tank body 10a to the heat exchange device 40 installed outside the tank body 10a, heat it, raise the temperature, The tank peripheral wall upper part and the tank peripheral wall lower part are each arrange | positioned so that hot water may be stored and circulated to 10a inside upper layer.

  In the hot water storage tank 1 configured as described above, the embodiment of the present invention is configured so that any or all of the peripheral walls of the water supply port 3, the hot water return port 6, and the reciprocating circulation ports 4 and 5 disposed on the peripheral wall S are provided. S that the opening inside the S is covered with the vertical straightening rectification cases 11 to 14 having a U-shaped cross-section and that the upper end of the rectification cases 11 to 14 of the hot water outlet 6 extends to the upper part of the tank body 10a. Furthermore, it has a feature in that the end plate rectifying plate 14a is connected to the extending upper end of the rectifying case 11 of the hot water return port 6 and the upper end of the rectifying case 11 of the outward circulation port 4 respectively.

This will be specifically described below.
FIG. 4 is a partial cross-sectional explanatory view of the hot water storage tank in Example 1 of the present invention.
As shown in FIG. 4, the water supply port 3, the water return port 6, and the reciprocating circuit circulation ports 4 and 5 are opened on the inner side surface of the tank peripheral wall S, and the openings of the pipe ports 3 to 6 are open and closed in a cross-section. It is covered with a letter-shaped rectifying case 11-14.

  FIG. 5 is a perspective explanatory view showing each structure of the rectifying cases 11 to 14 in the first embodiment of the present invention, (a) is a perspective explanatory view showing a structure of the piping port rectifying case 11, and (b) ) Is a perspective explanatory view showing the structure of the hot water return flow straightening case 12, (c) is a perspective explanatory view showing the structure of the upper flow straightening case 13, and (d) is the structure of the end plate straightening case 14. FIG.

The rectifying cases 11 to 14 are basically formed into a substantially U-shaped (or substantially U-shaped) cross-section with an open top and bottom by sheet metal processing.
Among these, as shown in FIG. 5A, the piping port rectifying case 11 has a substantially L-shaped bracket 15 to be attached to the inner side surface of the tank peripheral wall S corresponding to the mounting location. It has a structure projecting on both sides.
In addition, it has a structure in which a mounting hole 18a for vertical connection to the rectifying cases 12, 14 is formed at the upper end position of both side plates.
Further, a lid portion 21 that is bent and formed so that water and hot water flowing into each of the piping portions 3 to 6 do not escape is disposed in the upper opening or the lower opening of the piping port rectifying case 11.

  Or as shown in FIG.5 (b), the hot water return part rectification | straightening case 12 has the structure which drilled the attachment hole 18b for the up-down connection of a rectification | straightening case in the upper end and lower end position of a both-sides board.

Or as shown in FIG.5 (c), the upper rectification | straightening case 13 has the structure similar to Fig.5 (a), and has the structure which protruded the bracket 15 on both sides of a U-shape.
In addition, an insertion hole 19 into which the notch portion 16 of the hot water return portion rectifying case 12 is inserted is formed in the back plate portion.

Or as shown in FIG.5 (d), the mirror-plate part rectification | straightening case 14 has the structure where the lower end corner part 20 of both sides board was cut diagonally, and the mountain-shaped notch part 16 was formed in the back plate lower end.
Moreover, it has the structure which drilled the attachment hole 18c for the upper and lower connection of a rectification | straightening case in the lower end position of both sides board.

  The rectifying cases 11 to 14 are configured as described above and are disposed so as to cover the predetermined piping ports 3 to 6 or to be positioned on the end plate portion K of the tank body 10a.

  That is, the vertical rectifying case covering the position near the tank body ceiling 10 b above the water supply port 3, the water return port 6, the reciprocating circuit circulation ports 4, 5 and the water return port 6 has a substantially L-shaped bracket 15 at the top and bottom. A piping port rectification case 11 having the structure shown in FIG.

  Further, the mounting and fixing of the end plate rectification case 14 serving as a connection case is performed through a mounting hole 18c drilled in the upper and lower portions of the both side plates, and the piping port rectification case 11 such as the water supply port 3 disposed above (or below). The mounting holes 18a and 18c are connected and fixed by predetermined means such as mounting screws 17b, screws, caulking, and welding.

FIG. 6 is an explanatory view for explaining an assembling method of the rectifying cases 11 to 14 covering the hot water return port 6.
In this embodiment, as shown in FIG. 6, among the vertical piping port rectifying cases 11 covering the above-described piping ports 3 to 6, the piping port rectifying case 11 covering the hot water return port 6 and the tank body above it. Between the upper rectifying case 13 mounted in the vicinity of the ceiling 10b, there is interposed a hot water return rectifying case 12 as a connection case with an upper and lower opening shown in FIG. 5 (c). The rectifying cases 11 to 13 are configured such that the upper end is extended and connected to the end plate rectifying case 14 near the tank body ceiling 10b.

That is, as shown in FIG. 6, first, the piping port rectifying case 11 shown in FIG. 5A is positioned so as to cover the entire hot water return port 6, and the tank peripheral wall S is passed through a screw through the substantially L-shaped bracket 15. Secure to the inside surface.
Further, the upper rectifying case 13 shown in FIG. 5C having the predetermined distance from the piping port rectifying case 11 is screwed to a substantially L-shaped bracket 15 with a fixing screw (not shown). It is fixed on the inner surface of the tank peripheral wall S.
Next, a hot water return flow rectification case 12 shown in FIG. 5B is connected between the upper and lower piping port rectification cases 11 and the upper flow rectification case 13, and is attached to the screw holes 18a and 18b provided on both side plates. Secure through screw 17b.
Further, the notch 16 provided in the end plate rectifying case 14 shown in FIG. 5 (d) is inserted into the insertion hole 19 formed on the upper side of the back plate of the upper rectifying case 13, and the mounting holes 18a and 18c on both side plates are inserted. Fix through the mounting screw 17b.
And the mirror-plate part rectification | straightening case 14 is diagonally connected by the predetermined angle so that it may correspond to the mirror-plate part K which formed the tank main body ceiling 10b in the curved shape.
In this way, by completing the assembly of the rectifying cases 11 to 14 that cover the hot water return port 6, it is possible to improve and modify the existing hot water storage tank.

The diameters of the rectifying cases 11 to 14 described above are such that the flow rate per unit time of the rectifying cases 11 to 14 is about 1/4 to 1/10 of the flow rate per unit time of the return circulation port 5 or the hot water return port 6. It is supposed to be.
As a result, both the flow rate of hot water discharged from the return circulation port 5 and the flow rate of returned hot water discharged from the return hot water port 6 are decreased, and the temperature of the hot water flowing from the openings of the rectifying cases 11 to 14 toward the hot water outlet 2 is increased. Since the hot water is gently discharged, it is possible to prevent convection and stirring in the hot water tank 1 as much as possible, and the discharged hot water is sequentially laminated from the tank body ceiling 10b to the bottom 10c of the hot water tank 1. It is stored in a manner, that is, in a state where the interface with the cooler stored water is maintained.

On the other hand, cooler stored water is taken from the water supply port 3 disposed in the vicinity of the bottom 10 c in the hot water tank 1 to the forward circulation port 4.
At this time, as in the previous case, the diameter of the rectification cases 11 to 14 of the water supply port 3 is such that the flow rate per unit time of the rectification cases 11 to 14 is the flow rate per unit time of the water supply port 3 or the forward circulation port 4. It is set to about 1/4 to 1/10.
As a result, the stored water gradually flows into the rectifying cases 11 to 14 of the water supply port 3, so that the occurrence of convection of the stored water due to water intake is suppressed as much as possible, and the relatively high temperature stored water is relatively Relatively low temperature storage water can be collected while maintaining the interface with the low temperature storage water.

Furthermore, since a part of raw water discharged from the water supply port 3 is taken in by the outward circulation port 4 from the lower part of the tank main body 10a via the rectification cases 11-14, it passes through the rectification cases 11-14 of the water supply port 3. The amount of stored water taken from the vicinity of the bottom portion 10c in the hot water storage tank 1 is small, and therefore, the occurrence of convection of the stored water due to the intake water is further suppressed, and the rectification cases 11 to 14 are connected to the water supply port 3 through the rectifying cases 11-14. Thus, the amount of raw water directly supplied into the hot water tank 1 is also reduced, and convection of the stored water due to the supply of raw water is also suppressed.
Moreover, although there is a difference between the temperature of the raw water supplied from the water supply port 3 and the temperature of the stored water near the bottom 10c in the hot water tank 1, both are mixed in the lower part of the tank body 10a. Therefore, the convection of the stored water due to the temperature difference can be suppressed.

Therefore, when hot water is supplied within the heating capacity of the heat exchange device 40, a high hot water temperature region Rh of 65 ° C. or higher is formed above the opening end position of the water supply port 3 in the hot water tank 1, and A water temperature region of less than 25 ° C. is formed below the opening end position of the water supply port 3.
An interface between the hot water temperature region Rh and the water temperature region is formed at the opening end position of the water supply port 3 in the hot water tank 1.
As described above, in the hot water tank 1 according to the present invention, most of the region in the hot water tank 1 can be set to the high hot water temperature region Rh. Large quantities can be stored.

  On the other hand, in such a hot water supply apparatus, hot water supply exceeding the heating capability of the heat exchange device 40 is performed as follows.

  FIG. 7 is a drawing schematically showing the temperature change of the stored water in the hot water tank 1 when hot water in the hot water tank 1 is supplied beyond the heating capacity of the heat exchange device 40 in the hot water supply apparatus according to the present invention. It is.

  As shown in FIG. 7A, at the start of hot water supply, a high hot water temperature region Rh of 65 ° C. or higher is formed above the opening end position of the water supply port 3 in the hot water tank 1, A water temperature region Rw of less than 25 ° C. is formed below the opening end position of the water supply port 3, and an interface between the high hot water temperature region Rh and the water temperature region Rw is formed at the opening end position of the water supply port 3 in the hot water storage tank 1. Is formed.

  However, if the hot water supply exceeding the heating capacity of the heat exchanging device 40 continues, as shown in FIG. 7 (b), an amount of raw water corresponding to the amount of hot water discharged from the hot water storage tank 1 is supplied from the water supply port 3 to the hot water storage tank 1. While the amount of hot water heated and heated by the heater is introduced into the tank from the return circulation port 5 is smaller than the amount of hot water discharged outside the tank, the high hot water temperature region Rh is reduced. As the temperature starts, the water temperature region Rw expands.

Furthermore, when hot water supply exceeding the heating capacity of the heater continues, as shown in FIGS. 7 (c), (d) and (e), while the hot water temperature region Rh decreases, while maintaining the above-mentioned interface, The water temperature region Rw is further expanded.
However, during this time, the hot water temperature region Rh decreases while the interface between the high water temperature region Rh and the water temperature region Rw is substantially maintained, so that hot water having an effective temperature continues to be supplied.
And as shown in FIG.7 (e), most area | regions in the hot water tank 1 become the water temperature area | region Rw, and the hot water of an effective temperature is supplied until the high hot water temperature area | region Rh lose | disappears.

  Thus, at the start of hot water supply exceeding the heating capacity of the heater, since almost the entire amount of the high hot water temperature region Rh occupying most of the region in the hot water tank 1 is supplied while maintaining the effective temperature, When the capacity of 1 is the same as that of a conventional hot water tank, hot water at an effective temperature can be supplied for a longer time.

In the first embodiment, the end plate portion rectifying case 14 having a substantially U-shaped cross section is used in the upper part of the hot water tank 1, but instead of the end plate portion rectifying case 14, this embodiment is shown in FIG. Thus, the plate-shaped end plate part rectifying plate 14a is used. Other parts are the same as those in the first embodiment.
And the hot water inject | poured from the hot water return port 6 can be distribute | circulated to the ceiling part 10b of the hot water tank 1 by connecting the plate-shaped mirror-plate part rectification | straightening plate 14a to the other rectification | straightening cases 11-13.
Further, the plate-shaped end plate portion rectifying plate 14a can be formed in a curved shape along the end plate portion K formed in a curved shape by being formed of a flexible material.
Accordingly, the hot water injected from the hot water return port 6 can be smoothly flowed to the ceiling according to the shape of the upper end plate portion rectifying plate 14a, and the structure of the rectifying member is simplified and the mounting property is also improved as compared with the first embodiment. Can be easily.

Next, in this embodiment, as shown in FIG. 8 (b), a rectifying pipe 22 is used in the lower part of the hot water tank 1 to make a structure similar to Japanese Patent Application Laid-Open No. 2004-36107.
That is, the base end of the rectifying pipe 22 is communicated with the piping port rectification case 11a (having the lid portion 21 above and below) covering the water supply port 3 and the return circulation port 5, respectively. It is carried on a support leg 23 that passes through the bottom 10c of the hot water tank 1 in a state of being positioned below the base end side.
For example, a surplus air-conditioning stainless steel duct is used as the rectifying pipe 22.
By comprising in this way, it can be set as the form similar to the lower structure of the hot water tank described in Unexamined-Japanese-Patent No. 2004-36107.
That is, the water supplied from the water supply port 3 can be supplied to the lower part of the tank body with as little stirring and convection as possible, and the water at the lower part of the tank body can be reduced as much as possible with stirring and convection. Thus, the heat exchange device 40 can be supplied through the return circulation port 5.
The tank body ceiling 10b has the same structure as that of the first embodiment.
Therefore, in this embodiment, there is an effect that the cost of parts required for the hot water tank 1 can be reduced by using existing parts.

  In addition, the hot water tank 1 shown in FIG.8 (c) shows the structure of Example 1, and is shown in order to compare with another Example.

As described above, the hot water tank 1 of the present invention is prevented as much as possible from causing stirring and convection in the tank, and the injected hot water is sequentially stacked from the ceiling to the bottom of the hot water tank, that is, In addition to being stored while maintaining the interface with the raw water, the raw water supplied to the inside from the water supply port was prevented from causing agitation and convection in the hot water tank as much as possible and supplied to the inside. The raw water stays at the bottom of the tank body and is maintained without disturbing the interface between the hot water and the raw water.
Therefore, the boundary layer of the high and low temperature hot water becomes clear, and it has a structure that hardly causes unevenness in the hot water temperature.

By having such a structure, the capacity can be doubled by retrofitting the existing hot water tanks with the rectifying cases 11 to 14 shown in FIGS. The hot water storage tank 1 that can improve the heat exchange rate of 40 and can achieve energy saving that can suppress the circulation rate can be obtained.
Moreover, the rectifying cases 11 to 14 have a structure that can be easily manufactured by sheet metal processing, and have a structure that is easy to attach and assemble to the hot water storage tank.
Thereby, for example, even when replacing the heat exchange device 40 (boiler), the existing hot water storage tank can be used as it is, and the use can be continued with improved performance.
Furthermore, when the heat source (boiler) is replaced, it becomes possible to change to a hot water heater other than the boiler, EcoCute (heat pump water heater), or a hybrid hot water supply system with each of them, increasing the choice of hot water supply system.

  As mentioned above, although embodiment of this invention was described, the said embodiment showed one of the application examples of this invention, and in the meaning which limits the technical scope of this invention to the specific structure of the said embodiment. Absent. Various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Hot water outlet 3 Water supply port 4 Outward circulation port 5 Return circulation port 6 Hot water return port 40 Heat exchange apparatus S Tank peripheral wall 10a Tank main body 10b Tank main body ceiling 11-14 Rectification case 22 Rectification pipe 23 Support leg part

Claims (5)

For various types of hot water use, a hot water outlet arranged at the upper part of the peripheral wall of the tank for hot water supply,
A water supply port arranged in the lower part of the peripheral wall of the tank to feed raw water with low temperature hot water;
A hot water outlet arranged at the upper part of the peripheral wall to return the remaining hot water after various hot water use to the tank body,
The low-temperature hot water that has settled in the lower layer inside the tank body is returned to the heat exchange equipment outside the tank body, heated, heated, stored in the upper layer inside the tank body, and placed at the upper and lower parts of the peripheral wall of the tank for circulation. In the hot water storage tank composed of the forward circulation port and the backward circulation port,
Vertical rectification with a substantially U-shaped cross-section or a substantially U-shaped cross-section in which the opening on the inner surface of the tank peripheral wall of any one of the water supply port, hot water return port, forward circulation port and return circulation port disposed on the circumferential wall of the tank is opened and closed A hot water tank internal structure characterized by being covered with a case.   The internal structure of a hot water tank according to claim 1, wherein the openings on the inner side surface of the tank surrounding the rectifying case are a water supply port, a hot water return port, an outward circulation port, and a return circulation port.   3. The end plate rectification case is connected to the upper surface opening portion of the rectification case covering the water return port so as to correspond to the end plate portion in which the tank body ceiling is formed in a curved shape. Internal structure of hot water tank.   A plate-shaped end plate rectifying plate is connected to the upper opening of the top and bottom open rectifying case instead of the end plate rectifying case that is connected to the end plate that has a curved tank body ceiling. The hot water tank internal structure according to claim 3, wherein the hot water tank is internal.   The rectifying pipes are respectively connected to the rectifying cases covering the water supply port and the return circulation port, and the tip of each rectifying pipe is supported by the supporting leg part penetrating the bottom of the tank body while being positioned below the base end. The hot water tank internal structure according to any one of claims 1 to 4, wherein

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