JPH0894178A - Hot-water storage tank device - Google Patents

Abstract

PURPOSE: To permit supply of hot-water, supplying corresponding to the using amount at all times even when the using amount of hot-water becomes big while permitting the supply of hot-water quickly after starting heating even when the using amount of hot-water is big. CONSTITUTION: A hot-water storage tank device is constituted of a hot-water storage tank 1, a heating device 2, and a flowing device 3, conducting hot-water immediately above the heating device 2 to flow to the bottom of the hot-water storage tank 1 to supply it, while the hot-water storage tank 1 is formed so as to discharge hot-water to the outside from the upper part thereof, the heating device 2 is provided at a position higher than the substantially middle height of the hot-water storage tank 1 and is formed so as to control and heat water or hot-water above the heating device 2, further, the flowing device 3 is formed so as to send out the hot-water immediately above the heating device 2 to the bottom part of the hot-water storage tank 1 by a temperature difference between the temperature of hot-water in the upper part of the hot-water storage tank 1 and the temperature of the hot-water in the lower part of the hot-water storage tank 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention allows, for example, a hotel or other large-scale establishment to supply hot water at a predetermined temperature immediately after the start of heating, and to use the hot water even when it is used in a large amount. The present invention relates to a hot water storage tank device capable of constantly and stably supplying an amount of hot water corresponding to the amount.

[0002]

2. Description of the Related Art Conventionally, this kind of hot water storage tank device is
The structure shown in FIG. 3 is common.

That is, this hot water storage tank device H1 comprises a hot water storage tank 11 and a heating section 12 installed in the lower portion of the hot water storage tank 11.
It comprises a heating device 12 having a and a temperature sensor 14 arranged at an appropriate position above the heating device 12 in the hot water storage tank 11. The hot water storage tank 11 supplies water into the hot water storage tank 11 from the lower side and from the upper part. The hot water is formed so as to be discharged to the outside, and the water above the heating portion, which is most of the water in the hot water storage tank 11, is heated, and the temperature of the water is sensed by the temperature sensor and appropriately controlled. It was a method of storing a large amount of hot water and discharging it.

[0004]

However, such a hot water storage tank device H1 has a heating device 12 in the lower part of the hot water storage tank 11.
Since the heating section 12a of is configured to store a large amount of hot water having a predetermined temperature, the heating section 12a has a large capacity, but when the hot water storage is used up, the additional cooking is slow,
When a large amount of hot water is temporarily discharged, a situation in which hot water having a temperature equal to or lower than a predetermined hot water supply temperature is often discharged occurs.

Further, since the heated water has a low specific gravity, the hot water tank apparatus H1 tries to move only upward, so that the water located below the heating portion 12a of the heating device 12 may be heated. There was also a problem that that part would exist as a so-called dead zone.

In view of the above-mentioned problems, the present invention makes it possible to supply hot water immediately after the start of heating even when the amount of hot water used is large, such as in hotels and other large-scale establishments. However, even if the amount of hot water used is large, the problem was created to provide a hot water storage tank device capable of constantly supplying hot water in an allowable temperature range corresponding to the amount used and eliminating the dead zone described above. It is a thing.

[0007]

The present invention includes a hot water storage tank,
The hot water storage tank comprises a heating device installed in the hot water storage tank, a fluidizing device for flowing the hot water directly above the heating device in the hot water storage tank to supply it to the bottom of the hot water storage tank, and a control device for appropriately adjusting the fluidizing device. Is designed to supply water from the lower part into the hot water tank and to discharge hot water from the upper part to the outside, and the heating device is installed with the heating part at a position approximately in the middle of the hot water tank or at a height higher than that. The heating device in the hot water storage tank is formed so as to control and heat water or hot water above the heating unit, and the fluidizing device is formed so as to pump hot water directly above the heating unit in the hot water storage tank toward the bottom in the hot water storage tank. The controller controls the temperature of the hot water in the upper part of the hot water tank and the difference between the temperature of this hot water and the temperature of the lower part of the hot water tank so as to send the hot water directly above the heating part in the hot water tank to the bottom part of the hot water tank. By forming it, the above-mentioned problems are solved. .

Further, in particular, in the hot water storage tank, the inside of the hot water storage tank is located above the position of the heating portion of the heating device as a boundary, and the upper part is a heating zone,
At least one temperature sensor is arranged in each of the heating zone and the hot water storage zone, and the temperature sensor is provided near the suction port of the fluidizing device for sucking the hot water to supply the hot water to the bottom of the hot water storage tank. When the temperature sensor in the heating zone detects that the hot water at that position has reached the upper limit temperature of the allowable temperature range for tapping, the heating by the heating device is stopped and the allowable temperature range for tapping When it detects that the temperature has dropped below the lower limit temperature, it starts heating by the heating device to control heating, and the control device that adjusts the fluidizing device uses a temperature sensor near the suction port of the fluidizing device However, even if the temperature of the hot water discharged to the hot water storage zone does not deviate from the hot water discharge allowable temperature range, the temperature has reached the set temperature within the hot water discharge allowable temperature range. And was stopped the operation of the pump when sensing was lower than the lower limit temperature of the allowable temperature range to be and hot water by operating the pump flow device when,
Moreover, when the temperature sensor in the hot water storage zone detects that the temperature has reached the upper limit temperature of the hot water discharge allowable temperature range, the operation of the pump of the fluidizing device is controlled to be preferentially stopped so that the above-mentioned problems are solved. It is a solution.

[0009]

A hot water storage tank device according to the present invention includes a hot water storage tank, a heating device installed in the hot water storage tank, and a fluidizing device for flowing the hot water directly above the heating device in the hot water storage tank to the bottom of the hot water storage tank. Since the hot water heated by the heating device is supplied to the bottom of the hot water tank by the flow device, it is completely circulated because it comprises a control device that appropriately adjusts this flow device, so that no dead zone that is not heated is generated. It ’s all gone.

Since the hot water storage tank is formed so as to supply water into the hot water storage tank from the lower part and to discharge the hot water to the outside from the upper part, the hot water heated by the heating device moves upward. Since the heated hot water that has moved upward can be directly discharged from the hot water, the hot water is immediately supplied after the start of heating.

In the heating device, the heating unit is installed at a position approximately in the middle of the hot water storage tank or at a position higher than the heating unit to appropriately heat water or hot water above the heating unit in the hot water storage tank. The flow device is formed so as to pump hot water directly above the heating portion in the hot water storage tank toward the bottom portion in the hot water storage tank by a pump.
The control device is configured to appropriately adjust the temperature of the hot water in the upper part of the hot water storage tank and the temperature difference between this hot water and the lower temperature of the hot water storage tank to send the hot water directly above the heating portion in the hot water storage tank to the bottom part of the hot water storage tank. By doing so, hot water of a predetermined temperature can be immediately supplied directly from the upper part of the hot water storage tank, and the hot water above the heating part of the heating device is directed to the bottom part of the hot water storage tank with the hot water within the predetermined temperature range. By pumping with a pump,
The water below the heating section is also warmed, and eventually the entire hot water in the hot water storage tank is turned into hot water of a predetermined temperature.

[0012] In particular, in the hot water storage tank, the upper part is a heating zone and the lower part is a hot water storage zone with the position of the heating portion of the heating device as a boundary, and at least one of each of the heating zone and the hot water storage zone is provided. With more than one temperature sensor, in order to supply the hot water to the bottom of the hot water storage tank, place the temperature sensor near the suction port of the fluidizer that sucks the hot water,
When the temperature sensor in the heating zone detects that the hot water at that position has reached the upper limit temperature of the allowable temperature range to be discharged, heating by the heating device is stopped and the temperature is lower than the lower limit temperature of the allowable temperature range to be discharged. When it senses that the temperature has dropped, control heating is started to start heating by the heating device,
The control device for adjusting the fluidizing device uses a temperature sensor arranged near the inlet of the fluidizing device so that the hot water at that position does not deviate from the allowable hot water temperature range even if it is delivered to the hot water storage zone. When it detects that the temperature has reached the set temperature in the hot water discharge allowable temperature range, it activates the pump of the fluidizing device, and when it detects that the temperature has dropped below the lower limit temperature of the hot water discharge allowable temperature range, it stops the operation of the pump. Moreover, when the temperature sensor in the hot water storage zone detects that the temperature has reached the upper limit temperature of the hot water discharge allowable temperature range, it is controllable so as to preferentially stop the operation of the pump of the fluidizing device. , The hot water in the heating zone is heated by the heating device so that it is within the allowable temperature range where it should be discharged, and when the hot water temperature rises to that temperature range, the temperature sensor in that heating zone To sense.

Further, the temperature sensed by the temperature sensor portion near the suction port of the fluidizing device is within the allowable temperature range in which the hot water should be discharged. When the temperature reaches the set temperature in the hot water discharge allowable temperature range that does not deviate from the temperature range, the fluidizing device is operated to send the hot water in the heating zone to the bottom portion of the hot water storage tank, and the hot water is mixed with the water in the hot water storage zone. The water temperature rises and becomes hot water.

Therefore, when the temperature sensor in the hot water storage zone detects that the hot water in the hot water storage zone has reached the upper limit temperature of the hot water discharge allowable temperature range, the operation of the pump of the fluidizing device is stopped.

As a result, there is no generation of dead zones that are not heated, and even if the amount of hot water used is large, hot water is always supplied in the hot water discharge allowable temperature range.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

That is, reference numeral 1 shown in the drawing is a vertical hot water storage tank, which is formed to supply water from the lower water supply pipe 1a into the hot water storage tank 1 and to discharge hot water from the upper hot water discharge pipe 1b to the outside. The water supply from the water supply pipe 1a is formed so that the water reduced by the hot water is automatically supplied.

A heating device 2 is installed in this hot water storage tank. The heating device 2 has, for example, a large-capacity heating part 2a that heats by passing steam, and the heating part 2a is located approximately in the middle of the hot water tank 1 or slightly above it. It is installed at the position Then, with the heating part 2a as a boundary, the upper part of the hot water storage tank 1 is provided with a heating zone T,
The lower part is the hot water storage zone W.

The hot water storage tank 1 is provided with a fluidizing device 3 for circulating the water or hot water in the hot water storage tank 1.

This fluidizing device 3 includes a heating unit 2 in the hot water storage tank 1.
A suction port 3b is provided at a position where "a" is installed, and a pipe 3a is attached to the pump 3a attached to the outside of the hot water storage tank 1 so as to send it toward the bottom of the hot water storage tank 1.

In the hot water storage tank 1 thus formed, at least one temperature sensor 4a, 4c is provided in each of the heating zone T and the hot water storage zone W, and the temperature sensor is provided near the suction port 3b of the fluidizing device 3. 4b is arranged to serve as a control device for controlling at least the flow device 3 together with the temperature sensor 4c. Specifically, the first temperature sensor 4a is located substantially in the middle of the heating zone T of the hot water storage tank 1, the second temperature sensor 4b is located near the suction port 3b of the fluidizing device 3, and the middle of the hot water storage zone W is located in the middle. Is the third
Each temperature sensor 4c is arranged.

When it is detected by the first temperature sensor 4a that the hot water at that position has reached the upper limit temperature of the allowable temperature range for tapping, the heating by the heating device 2 is stopped and the allowable temperature for tapping is set. When it is detected that the temperature is lower than the lower limit temperature of the range, control heating is performed to start heating by the heating device 2, and hot water at that position is discharged by the second temperature sensor 4b even if it is sent to the hot water storage zone W. When it is detected that the temperature of the hot water has reached the set temperature in the hot water discharge allowable temperature range that does not deviate from the hot water discharge allowable temperature range, the pump 3a of the fluidizing device 3 is operated and the lower limit temperature of the hot water discharge allowable temperature range is exceeded. Also, when it senses that the pump has decreased, the pump 3a is controlled to stop operating,
Moreover, when it is detected by the third temperature sensor 4c that the temperature of the hot water in the hot water storage zone W reaches the upper limit temperature of the hot water discharge allowable temperature range, the pump 3a of the fluidizing device 3 is controlled to be preferentially stopped. Is formed.

In more detailed control, for example, when the allowable hot water temperature range is 50 ° C. to 60 ° C., the first temperature sensor 4a detects that the hot water at that position has reached 60 ° C. When the heating by the heating device 2 is stopped and the heating by the heating device 2 is detected when it is detected that the temperature is lower than 50 ° C., the second temperature sensor 4b controls the hot water at that position to When the temperature of 55 ° C is detected, the pump 3a of the flow device 3 is operated, and when the temperature of 50 ° C is detected, the pump 3a is stopped, and the third temperature sensor 4c is controlled. Thus, when it is detected that the temperature of the hot water in the hot water storage zone W has reached 60 ° C., the operation of the pump 3a of the fluidizing device 3 is controlled to be preferentially stopped.

The change in the hot water temperature in the hot water storage tank 1 under the control of the temperature sensors 4a, 4b, 4c thus formed will be described in comparison with the conventional hot water storage tank device H1 shown in FIG. Is the street.

That is, the capacity of the hot water storage device is, for example, 1000 liters, and the heating devices 2 and 12 are
Assuming 43000 kcal / hr and 1550 liters / hr of discharged hot water, a transition diagram of the water temperature of the hot water tank device H of the present application is shown in FIG. 2, and a transition diagram of the water temperature of the conventional hot water tank device H1 is shown in FIG.

Looking at these water temperature transition diagrams, first, in the case of the hot water tank apparatus H of the present application, the amount of water in the heating zone T is equal to the volume.
Since it is less than half of 1,000 liters, it reaches the lower limit temperature of 50 ° C in about 22 minutes and the hot water can be discharged from that point (point a in the figure). On the other hand, in the case of the conventional hot water storage tank device H1, since the heating device 12 is arranged in the lower part of the hot water storage tank 11, the entire water in the hot water storage tank 11 is heated, and about 40 hot water is ready to be discharged. It takes about 50 minutes (a1 point in the figure). Therefore, in the case of the hot water tank apparatus H of the present application, the time until the hot water can be discharged is half.

Then, by the second temperature sensor 4b, 55 ° C.
When the temperature of the hot water is sensed, the pump 3a of the fluidizing device 3 is activated to send the hot water near the suction port 3b to the bottom of the hot water storage tank 1. Then, since the water in the hot water storage zone W is mixed with the hot water in the heating zone T, the water temperature rises, which is sensed by the third temperature sensor 4c, and eventually the hot water temperature in the hot water storage zone W becomes 50 ° C or higher. 3 temperature sensor 4c
When the temperature of 60 ° C. is detected, the pump 3a of the flow device 3 is stopped. It takes about 40 minutes from the start of heating until that time (point b in the figure).

2 and 4, the wavy line portion is the time zone in which the heating device 2 is operating, and the thick line portion is the time zone in which the fluidizing device 3 is operating.

After that, the hot water storage tank device H of the present application and the conventional hot water storage tank device H1 respectively discharge hot water, and since the water is automatically supplied from the discharged water distribution pipe 1a, the water temperature gradually decreases. However, if the hot water temperature of the heating zone T is determined by the first temperature sensor 4a or the hot water temperature of the hot water storage tank 11 is determined by the temperature sensor 14 to be within the allowable hot water discharge range of 50 ° C to 60 ° C, the heating devices 2 and 12 are stopped during that time. It is in the state of having done.

In the case of the hot water tank apparatus H of the present application, the first temperature sensor operates so that when the hot water temperature sensed by the first temperature sensor 4a becomes lower than 60 ° C. and drops below 50 ° C. 4a gives an instruction to heat the hot water in the heating zone T, and the above-mentioned steps are repeated again.
When the temperature in the vicinity of the suction port 3b of the fluidizing device 3 becomes 55 ° C. by the second temperature sensor 4b, the fluidizing device 3 is operated to send hot water from the heating zone T to the hot water storage zone W and the hot water is present in the hot water storage zone W. The temperature of the hot water having a low temperature or the hot water mixed with water is raised, and the pump 3a of the fluidizing device 3 is stopped when the hot water temperature of the hot water storage zone W reaches 60 ° C. by the third temperature sensor 4c. First temperature sensor 4a
The heating of the heating device 2 is stopped when the sensed temperature exceeds 60 ° C. Therefore, this step is a so-called additional cooking state, in which the hot water in the heating zone T is heated,
When the temperature exceeds 55 ° C, the fluidizing device 3 is automatically operated so that the hot water temperature in the heating zone T is within the allowable hot water temperature range of 50 ° C to 60 ° C.
Since the hot water is sent to the hot water storage zone W to the extent that it does not deviate from ℃, the temperature of the hot water discharged is very small at that time (point c in the figure), and is maintained in a stable state that does not always deviate from the allowable hot water temperature range. It is what

On the other hand, in the case of the conventional hot water storage tank apparatus H1, since the temperature sensor 14 is installed in the substantially middle portion and the heating device 12 is installed near the bottom portion of the hot water storage tank 11, the hot water storage tank 11 is provided. When the temperature of the whole hot water has dropped, the whole is overheated, and the temperature of the hot water that comes out while heating the whole may deviate from the allowable hot water temperature range. The gap is very large (point c1 in the figure), and the temperature of the hot water to be discharged deviates from the allowable hot water temperature range, or the hot water has to be stopped until it reaches the allowable temperature range.

Further, in the case of the conventional hot water storage tank apparatus H1, there is a so-called dead zone in which water remains as it is because the portion under the heating portion 12a of the heating device 12 is not heated by any means. In the case of the bath apparatus H, the hot water in the heating zone T is sent out to the bottom portion in the hot water storage tank 1 by the flow device 3, so that the dead zone is completely eliminated, and the hot water storage tank apparatus H is excellent in efficiency.

Here, in the illustrated case, each temperature sensor 4
Although one a, 4b, and 4c is provided, it is needless to say that two or more a, 4b, and 4c may be provided because more control can be performed if more than that is provided.

Here, in the case of the above-described embodiment, the vertical hot water storage tank 1 has been described, but the same applies to a horizontal hot water storage tank.

[0035]

According to the present invention thus formed, the hot water storage tank 1, the heating device 2 installed in the hot water storage tank 1, and the hot water directly above the heating device 2 in the hot water storage tank 1 are stored in the bottom of the hot water storage tank 1. Since it comprises a fluidizing device 3 for fluidizing the fluidizing device 3 and a control device for appropriately adjusting the fluidizing device 3, the hot water heated by the heating device 2 is supplied by the fluidizing device 3 to the bottom of the hot water tank 1. Since it is completely circulated, the generation of dead zones that are not heated can be completely eliminated, and the hot water storage tank 1 with no wasted space can be obtained.

Since the hot water storage tank 1 is formed so as to supply water into the hot water storage tank 1 from the lower portion and discharge the hot water to the outside from the upper portion, the hot water heated by the heating device 2 moves upward. In this case, the heated hot water that has moved to the upper side can be directly discharged as it is, so that the hot water can be promptly supplied after the start of heating.

In addition, the heating device 2 includes a heating unit 2a and a hot water storage tank 1
It is installed at a position approximately in the middle of the inside or a height higher than it, and is appropriately formed to controlly heat water or hot water above the heating portion 2a in the hot water storage tank 1. The hot water directly above the heating part 2a in the inside is pumped toward the bottom part in the hot water tank 1.
It is formed so as to be delivered by a. The control device appropriately adjusts the temperature of the hot water above the hot water tank 1 and the temperature difference between this hot water and the lower temperature of the hot water tank 1 to adjust the hot water directly above the heating unit 2a in the hot water tank 1. Since the hot water of a predetermined temperature is directly supplied from the upper portion of the hot water storage tank 1 by being formed so as to be sent to the inner bottom of the hot water storage tank 1, the hot water on the heating portion 2a of the heating device 2 falls within the predetermined temperature range. By sending hot water directly above the heating unit 2a toward the bottom of the hot water storage tank 1 by the pump 3a in this state, the water below the heating unit 2a is also warmed up, and finally the entire hot water in the hot water storage tank 1 is set to a predetermined level. It can be hot water at a temperature.

In particular, in the hot water storage tank 1, the hot water storage tank 1
The inside is a heating zone T with the position of the heating part 2a of the heating device 2 as a boundary, and the lower side is a hot water storage zone W, and at least one or more temperature sensors 4a, 4c are provided in the heating zone T and hot water storage zone W, respectively. A temperature sensor 4b is arranged near the suction port 3b of the fluidizing device 3 for sucking the hot water in order to supply the hot water to the bottom of the hot water storage tank 1. When the upper limit temperature of the allowable temperature range to be tapped is detected, the heating by the heating device 2 is stopped, and when the lower limit temperature of the allowable temperature range to be tapped is detected, the heating device 2 is detected. Control heating to start heating by
The controller for adjusting the fluidizing device 3 uses the temperature sensor 4b arranged in the vicinity of the suction port 3b of the fluidizing device 3 so that even if the hot water at that position is delivered to the hot water storage zone W, the temperature of the hot water to be discharged is within the allowable hot water temperature range. When it is detected that the set temperature in the allowable hot water temperature range does not deviate from the above, the pump 3a of the fluidizing device 3 is operated and it is detected that the temperature is lower than the lower limit temperature of the allowable temperature range in which hot water should be discharged. When the temperature sensor 4c of the hot water storage zone W detects that the temperature reaches the upper limit of the hot water discharge allowable temperature range, the operation of the pump 3a of the fluidizing device 3 is preferentially stopped. Since it is formed so as to be controllable, the hot water in the heating zone T is first heated by the heating device 2 so as to be within an allowable temperature range in which hot water should be discharged, and the hot water temperature rises to that temperature range. The temperature sensor 4a of the heating zone T detects the temperature, and the temperature detected by the temperature sensor 4b near the suction port 3b of the flow device 3 is within the allowable temperature range to be discharged. When the temperature of the hot water discharged to the hot water storage zone W reaches a set temperature within the hot water discharge allowable temperature range that does not deviate from the hot water discharge allowable temperature range, the fluidizing device 3 is operated to remove the hot water in the heating zone T. It is sent to the bottom part of the hot water storage tank 1 and the hot water storage zone W
Hot water is mixed with the water and the water temperature rises to become hot water, which can be heated.

Therefore, when the temperature sensor 4c of the hot water storage zone W detects that the hot water in the hot water storage zone W has reached the upper limit temperature of the hot water discharge allowable temperature range, the operation of the pump 3a of the fluidizing device 3 is stopped. As described in detail in the above-mentioned embodiment, the gap of the temperature drop in the additional cooking state is extremely small, and the hot water in the allowable hot water temperature range is constantly supplied even if the amount of hot water used is large. Is.

As described above, according to the present invention, even when the amount of hot water used is large, such as in a hotel or other large-scale establishment, the hot water can be quickly supplied after the start of heating, Even if the usage amount of the hot water becomes large, it is possible to always stably supply hot water in an allowable temperature range corresponding to the usage amount, and it is possible to achieve various excellent effects such as eliminating the dead zone described above. is there.

[Brief description of drawings]

FIG. 1 is a schematic front view of an embodiment of the present invention.

FIG. 2 is a transition diagram of water temperature in a heated state according to an embodiment of the present invention.

FIG. 3 is a schematic front view of a conventional hot water tank apparatus.

FIG. 4 is a transition diagram of water temperature in a heating state of a conventional hot water storage tank device.

[Explanation of symbols]

H hot water storage tank device H1 hot water storage tank device T heating zone W hot water storage zone 1 hot water storage tank 1a water supply pipe 1b hot water discharge pipe 2 heating device 2a heating part 3 fluidizing device 3a pump 3b suction port 4a first temperature sensor 4b second temperature sensor 4c second 3 temperature sensor 11 hot water storage tank 12 heating device 12a heating unit 14 temperature sensor

Claims (2)

[Claims] 1. A hot water storage tank, a heating device installed in the hot water storage tank, a flow device for flowing hot water directly above the heating device in the hot water storage tank to the bottom of the hot water storage tank, and the flow device is appropriately adjusted. The hot water storage tank is configured to supply water from the lower part into the hot water storage tank and to discharge hot water from the upper part to the outside, and the heating device is configured so that the heating portion is approximately in the middle of the hot water storage tank or more than that. It is installed at the upper position to form water or hot water above the heating part in the hot water storage tank for controlled heating, and the flow device uses the hot water directly above the heating part in the hot water storage tank to the bottom of the hot water storage tank. The control device is formed so as to be pumped toward the hot water storage tank. Hot water storage characterized by being formed to deliver it to the bottom of the tank Tank equipment. 2. The hot water storage tank has at least one heating zone and at least one heating zone in the hot water storage tank. Along with the temperature sensor, the temperature sensor is placed near the inlet of the fluidizer that sends the hot water to the bottom of the hot water storage tank. When the upper limit temperature of the allowable temperature range is detected, the heating by the heating device is stopped, and when the lower limit temperature of the allowable temperature range for tapping is detected, the heating device starts heating. The control device that controls and heats the flow device so that the hot water at that position is discharged by the temperature sensor placed near the suction port of the flow device even if it is delivered to the hot water storage zone. When it was detected that the temperature had reached the set temperature in the hot water discharge allowable temperature range that did not deviate from the hot water discharge allowable temperature range, the pump of the fluidizing device was operated and the temperature fell below the lower limit temperature of the hot water discharge allowable temperature range. When the temperature sensor in the hot water storage zone detects that the temperature reaches the upper limit of the hot water discharge allowable temperature range, the pump operation of the fluidizing device is preferentially stopped when The hot water storage tank device according to claim 1, which is formed so as to be controllable.