JP6342145B2 - Hot water storage hot water supply system - Google Patents

Description

  The present invention relates to a hot water storage hot water supply system that stores hot water generated by a heat source device in a hot water storage tank and supplies the hot water to a load side.

  In a hot water storage type hot water supply system, a heat pump is used as a heat source unit, and a plurality of hot water storages are provided between a hot water outlet pipe from the water / refrigerant heat exchanger and a low temperature water supply pipe to the water / refrigerant heat exchanger. The tanks are connected in series (including the case where a plurality of tanks are connected in series), and the hot water storage tank is connected to the hot water supply pipe near the hot water outlet piping. Conventionally, a hot water storage type hot water supply system having a structure in which a tank is used as a hot water storage tank, and a water supply pipe from a water supply source and a low temperature water supply pipe to the water / refrigerant heat exchanger are connected to the hot water storage tank. Known (see Patent Documents 1 and 2).

  On the other hand, as described above, even in a system in which a plurality of hot water storage tanks are connected in series, hot water to the load side is discharged from the top of the uppermost hot water storage tank and supplied as hot water at a predetermined temperature via a mixing valve. When hot water of two different temperatures is allowed to be supplied, as shown in Patent Document 1, the hot water taken out from the upper part of the uppermost hot water storage tank is branched, and one of the hot water remains as the other, Either mix with low temperature water with a mixing valve to lower the temperature and supply hot water as medium or low temperature water, or use a dedicated hot water storage tank that can take out hot water at two different temperatures The method was adopted.

JP 2005-127640 A JP 2011-169484 A

  However, when using a tank with a dedicated structure that extracts hot water of two different temperatures, there are problems such as higher costs and difficulty in adding more tanks compared to using a tank dedicated to simple hot water storage. It was. On the other hand, as disclosed in Patent Document 1, when a method is used in which hot water taken out from the uppermost hot water storage tank is branched and temperature is individually adjusted to take out hot water of two or more temperatures, a simple tank dedicated to hot water storage is used. Although it is possible to easily extract hot water of two or more temperatures by using it, in this case, hot water is always discharged from the most upstream hot water storage tank. However, it is difficult to sequentially supply hot water for other purposes.

  In other words, in the above system, when hot water is discharged from the top of the most upstream hot water storage tank to the load side, low-temperature water equivalent to the amount of hot water discharged is supplied from the water supply source to the bottom of the hot-water storage tank downstream. The temperature boundary layer between the low-temperature water and the high-temperature water moves to the upstream hot water storage tank, and the temperature of the high-temperature water gradually decreases as the high-temperature water and low-temperature water are mixed. Is inevitable. For this reason, when it is applied to a use where a required amount of high-temperature water must be secured for heat sterilization, such as a hot water storage hot water system used in a food service center or food processing factory, for example, There was a possibility that high temperature water could not be taken out.

  The present invention has been made in view of such circumstances, and by using a plurality of simple tanks dedicated for hot water storage, hot water at two or more different temperatures can be taken out simultaneously or individually according to different uses. An object of the present invention is to provide a hot water storage type hot water supply system having a simple and inexpensive structure that can supply hot water while reliably securing a required amount of high-temperature water whose use is specified.

In order to solve the above-described problems, the hot water storage type hot water supply system of the present invention employs the following means.
That is, the hot water storage hot water supply system according to the present invention is a hot water storage hot water supply system in which high temperature water generated by a heat source device is stored in a hot water storage tank, and the high temperature water can be sequentially supplied to the load side. A plurality of the hot water storage tanks are connected in series by connecting pipes between a hot water supply pipe and a low-temperature water supply pipe to the heat source unit, and from the heat source units in the plurality of hot water storage tanks The hottest hot water storage tank closest to the hot water supply pipe is the hot water storage hot water storage tank, the downstream downstream hot water storage tank is the hot water storage tank for the heat source, and the uppermost hot water storage hot water tank is hot water. hot water supply system is connected, its the connection pipe connected to the top of one or more of the hot water storage tank of the downstream side, of different temperatures through the mixing valve hot water is connected to one or more of the hot water supply system capable of hot water It features that.

  According to the present invention, there is provided a hot water storage hot water supply system including a hot water storage tank, wherein a plurality of hot water storage tanks are connected in series between a hot water outlet piping from the heat source unit and a low temperature water supply piping to the heat source unit. The most upstream hot water storage tank closest to the hot water supply piping from the heat source units in the hot water storage tanks is connected to the hot water supply hot water storage tank, and the most downstream hot water storage tank is used for water supply to the heat source unit. A hot water storage tank is connected to a hot water storage hot water tank, and hot water having different temperatures can be supplied to the upper part of one or more hot water storage tanks downstream of the hot water storage tank via a mixing valve. Since the above hot water supply systems are connected, hot water is supplied from the hottest hot water storage tank among the plurality of hot water storage tanks connected in series, and from one or more hot water storage tanks downstream thereof via a mixing valve Different temperature hot water By hot water, without using a two temperature extraction hot water storage tank only retrieves at least two different temperatures or hot water from the hot water storage type hot-water supply system 1 group simultaneously or individually, it can be hot water supply to the load side. In addition, by extracting medium-temperature and low-temperature water from one or more downstream hot water storage tanks via a mixing valve, the required amount of high-temperature water is stored in the hot water storage hot water storage tank while being stored in the downstream hot water storage tank. Hot water stored in the hot water can be supplied and consumed sequentially. Therefore, an inexpensive hot water storage system that can supply hot water at two or more different temperatures at the same time or separately by using multiple tanks with a simple structure dedicated to hot water storage without using a specially configured tank. In addition to providing a hot water supply system, it is possible to provide a hot water storage hot water supply system that can reliably secure a required amount of high-temperature water whose use is specified.

  Furthermore, in the hot water storage hot water system according to the present invention, in the hot water storage hot water system described above, a water supply pipe branched from a water supply pipe connected to a bottom of the hot water storage tank is connected to the mixing valve. It is characterized by that.

  According to the present invention, since the water supply pipe branched from the water supply pipe connected to the bottom of the hot water storage tank is connected to the mixing valve, when supplying hot water from the downstream hot water storage tank to the load side, Low temperature water is supplied to the mixing valve through a water supply pipe branched from the pipe, and hot water can be supplied by adjusting to a medium temperature water or a low temperature water at a set temperature. Therefore, while securing the required amount of high-temperature water in the hot water storage hot water tank, hot water at different temperatures is taken out simultaneously or separately from the hot water supply from the hot water storage hot water tank, and hot water is supplied to the load side. can do.

  Furthermore, the hot water storage hot water system of the present invention is the hot water storage hot water system according to any one of the above, wherein hot water can be supplied from the hot water storage hot water tank at the most upstream, and at least one of the hot water storages downstream thereof. Hot water of different temperatures can be supplied from the tank, and hot water of at least two different temperatures can be supplied simultaneously or individually.

  According to the present invention, hot water can be supplied from the most hot water storage hot water storage tank, and hot water having different temperatures can be supplied from one or more hot water storage tanks downstream of the hot water storage tank. Since hot water can be supplied simultaneously or individually, it is possible to supply hot water from the hottest hot water storage tank by simply connecting multiple hot water storage tanks in a simple configuration dedicated to hot water storage in series. With hot water supply of different temperatures from one or more hot water storage tanks on the downstream side, hot water of at least two different temperatures can be supplied simultaneously or individually. Therefore, it is possible to provide a hot water storage type hot water supply system that can take out hot water at two or more different temperatures corresponding to different uses at the same time or individually without using an expensive two-temperature extraction hot water storage tank having a dedicated structure. it can.

  Furthermore, the hot water storage type hot water supply system of the present invention is characterized in that, in any one of the hot water storage type hot water supply systems described above, the plurality of hot water storage tanks are respectively dedicated hot water storage tanks having the same structure.

  According to the present invention, since a plurality of hot water storage tanks are respectively dedicated to hot water storage tanks having the same structure, a plurality of hot water storage tanks connected in series are tanks having the same structure dedicated to hot water storage having an existing simple structure. Can be configured. Accordingly, it is possible to provide a hot water storage type hot water supply system that uses a plurality of inexpensive dedicated hot water storage tanks that can take out hot water at two or more different temperatures at the same time or individually according to different uses at low cost.

  According to the present invention, hot water is supplied from the hottest hot water storage tank in the uppermost stream among a plurality of hot water storage tanks connected in series, and hot water having different temperatures is supplied from one or more hot water storage tanks downstream thereof via the mixing valve. By using hot water supply, it is possible to take out hot water of at least two different temperatures simultaneously or individually from one hot water storage hot water supply system without using a dedicated two-temperature hot water storage tank, and supply hot water to the load side. By extracting medium-temperature and low-temperature water from one or more downstream hot water storage tanks through a mixing valve, hot water is stored in the downstream hot water storage tank while storing the required amount of hot water in the hot water storage hot water tank. Therefore, it is possible to supply hot water that has been used sequentially and consume it, so there is no need to use a specially configured tank. It is possible to provide an inexpensive hot water storage system that can take out hot water of two or more different temperatures depending on the use at the same time or separately and supply hot water, and supply the required amount of high-temperature water for which the use is specified. It is possible to provide a hot water storage type hot water supply system that can be reliably secured.

It is a lineblock diagram of the hot water storage type hot-water supply system concerning one embodiment of the present invention. It is operation | movement explanatory drawing at the time of the hot water storage driving | operation of the said hot water storage type hot-water supply system. It is operation | movement explanatory drawing at the time of the hot water supply of the said hot water storage type hot-water supply system. It is operation | movement explanatory drawing at the time of middle temperature water or low-temperature water hot water supply of the said hot water storage type hot water supply system. It is operation | movement explanatory drawing at the time of the hot water supply of the said hot water storage type hot-water supply system at the time of the hot water of 2 temperature hot water of middle temperature water or low temperature water.

An embodiment of the present invention will be described below with reference to FIGS.
The block diagram of the hot water storage type hot-water supply system which concerns on one Embodiment of this invention is shown by FIG.
The hot water storage hot water supply system 1 includes a heat source device 2 that includes a heat pump, an electric water heater, a boiler, and the like that generate low temperature water by heating low temperature water. This heat source unit 2 is configured to heat low temperature water supplied from the hot water storage unit 3 side via a water supply pump via a heat exchanger, a heater 2A, etc., and circulate it as high temperature water to the hot water storage unit 3 side. A known heat source device 2 can be used.

  The hot water storage unit 3 is connected in series between the hot water outlet piping 4 from the heat source unit 2 and the low temperature water supply piping 5 to the heat source unit 2 via connection pipes 6A and 6B. A plurality of hot water storage tanks 7A, 7B, 7C are provided. Here, an example is shown in which three hot water storage tanks 7A, 7B, and 7C are connected in series. However, the hot water storage tank may be one in which at least two or more tanks are connected in series.

  In the following description, among the plurality of hot water storage tanks 7A, 7B, and 7C, the hot water storage tank 7A connected to the position closest to the hot water outlet piping 4 from the heat source unit 2 is the uppermost hot water storage hot water storage tank. 7A, at least one hot water storage tank 7B connected to the downstream side thereof is referred to as a downstream hot water storage tank 7B, and a hot water storage tank 7C connected to the water supply pipe 5 is referred to as a most downstream hot water storage hot water tank 7C.

  A water supply pipe 8 is connected to the bottom of the water supply hot water storage tank 7 </ b> C on the most downstream side, so that city water (tap water) from a water supply or the like as a water supply source can be supplied through the water supply pipe 8. The low temperature water supplied to the hot water storage tank 7C through the water supply pipe 8 can be supplied from the bottom of the hot water storage tank 7C to the heat source unit 2 via the water supply pipe 5 and a water supply pump (not shown). The water supply source is not necessarily limited to city water from a water supply or the like, and may be well water or the like.

  On the other hand, a hot water supply pipe (hot water supply system) 9A for supplying high temperature water (hot water supply A) to the load side is connected to the upper part of the uppermost hot water storage hot water storage tank 7A, and hot water is stored in the hot water storage hot water storage tank 7A. It is set as the structure which can supply high temperature water to the required high temperature water load use. Of course, a mixing valve 10A may be installed in the hot water supply pipe 9A as needed so that hot water can be adjusted to a predetermined temperature to supply hot water. In this case, a water supply pipe 11A branched from the water supply pipe 8 may be connected to the mixing valve 10A so that hot water can be supplied by mixing low temperature water with high temperature water and adjusting the high temperature water to a predetermined temperature.

  Further, in the present embodiment, the hot water supply (hot water supply) is supplied to the downstream side hot water storage tank 7B and the most downstream hot water storage water storage tank 7C with the connection pipes 6A and 6B at the upper part thereof. B, hot water supply C) (hot water supply system) 9B, 9C is connected. The hot water supply pipes 9B and 9C are also provided with mixing valves 10B and 10C, respectively, and the water supply pipes 11B and 11C branched from the water supply pipe 8 are connected to the hot water storage tanks 7B and 7C. Hot water stored in hot water can be adjusted to medium or low temperature water to supply hot water for a required load.

In the hot water storage type hot water supply system 1 described above, the hot water storage operation is performed as follows.
First, the hot water storage tanks 7A, 7B, and 7C are filled with low-temperature water by supplying water from the water supply pipe 8. From this state, as indicated by solid arrows in FIG. 2, low temperature water is sequentially supplied from the bottom of the hot water storage tank 7C to the heat source unit 2 via the water supply pipe 5 and a water supply pump (not shown), and the heat exchanger, heater The hot water storage operation is started by generating hot water by heating with 2A or the like. This high-temperature water is supplied to the upper part of the uppermost hot water storage hot water storage tank 7A through the hot water supply pipe 4 from the heat source unit 2, and as shown in FIG. Hot water is stored in the hot water storage tanks 7B and 7C while forming a temperature boundary layer.

  When it is detected that a plurality of hot water storage tanks 7A, 7B, and 7C have stored a predetermined amount of high-temperature water, boiling is completed and the hot water storage operation is terminated. This hot water storage operation is usually performed at midnight using inexpensive nighttime power. FIG. 1 shows a state where boiling is completed, and a predetermined amount of high-temperature water is stored in each of the plurality of hot water storage tanks 7A, 7B, and 7C.

On the other hand, the hot water supply operation that consumes the high-temperature water stored in the hot water storage tanks 7A, 7B, and 7C is performed as follows during the consumption period. FIG. 3 shows an operation diagram in the case where hot water is supplied from the hottest hot water storage tank 7A through the hot water supply pipe 9A.
In this case, hot water is sequentially discharged from the upper part of the hot water storage tank 7A for hot water supply through the hot water supply pipe 9A, and is supplied from the water supply pipe 11A as needed by the mixing valve 10A provided in the hot water supply pipe 9A. After being mixed with low-temperature water and adjusted to the required temperature, hot water is supplied to the load side (hot water supply A).

  When hot water is discharged from the hot water storage tank 7A at the uppermost stream, low-temperature water corresponding to the amount of hot water is supplied to the downstream hot water storage tank 7C via the water supply pipe 8 to supply hot water. The high temperature water in the tank 7C is pushed out to the hot water storage tanks 7B and 7A on the upstream side. As a result, the hot water in the hot water storage tanks 7B and 7C is sequentially moved to the hot water storage hot water storage tank 7A, as shown by the solid line arrow in FIG. For this reason, the hot water storage tank 7A for the hot water supply is always maintained in a state in which a required amount of high-temperature water is secured.

FIG. 4 shows an operation diagram in the case where hot water is supplied from the most downstream hot water storage tank 7C via hot water supply piping 9C.
In this case, high temperature water is discharged from the uppermost part of the most downstream hot water storage tank 7C, and mixed with low temperature water from the water supply pipe 11C by the mixing valve 10C in the hot water supply pipe 9C to adjust the temperature to medium temperature water or low temperature water. Then, hot water is supplied to the load side (hot water supply C). At this time, low-temperature water corresponding to the amount of hot water discharged from the hot water storage tank 7C is supplied to the hot water storage tank 7C via the water supply pipe 8, but when all the high-temperature water stored in the hot water storage tank 7C is consumed, The low temperature water supplied from the water supply pipe 8 is discharged as it is through the hot water supply pipe 9C.

  Therefore, the amount of high-temperature water that can be supplied from the most downstream hot-water storage tank 7C via the hot-water supply pipe 9C as medium-temperature water or low-temperature water is limited to the high-temperature water stored in the most downstream hot-water supply hot water storage tank 7C. Hot water stored in the upstream hot water storage tank 7B or 7A cannot be supplied from the hot water supply pipe 9C.

  In addition, it is clear according to the individual hot water supply (hot water supply A or hot water supply C) from the hot water storage tanks 7A and 7C that hot water supply (hot water supply B) can be performed individually from the hot water storage tank 7B, and need not be described in detail. However, when hot water is individually supplied from the hot water storage tank 7B, even if all of the hot water stored in the hot water storage tank 7B is used, hot water stored in the hot water storage tank 7C on the downstream side can be additionally supplied. Although not limited to hot water supply only in the hot water storage tank 7B, the hot water stored in the hot water storage hot water storage tank 7A cannot be supplied from the hot water supply pipe 9B. Therefore, a predetermined amount of high-temperature water can be ensured in the most hot water storage hot water storage tank 7A.

Thus, in the present embodiment, hot water having different temperatures or hot water having the same temperature can be supplied from the three hot water storage tanks 7A, 7B, 7C individually for a plurality of uses.
Furthermore, in this embodiment, hot water of two or more different temperatures can be supplied simultaneously or individually from two or more hot water storage tanks 7A, 7B, and 7C. For example, the hot water storage tank 7A and the hot water storage tank 7B, the hot water storage tank 7A and the hot water storage tank 7C, the hot water storage tank 7B and the hot water storage tank 7C, and the hot water storage tank 7A, the hot water storage tank 7B and the hot water storage tank 7C, respectively. Can be used for multiple purposes.

As an example, FIG. 5 shows an operation diagram in the case where hot water of two different temperatures is simultaneously supplied from the hot water storage tank 7A and the hot water storage tank 7C. Below, based on FIG. 5, the hot water supply operation | movement is demonstrated in detail.
In this case, hot water can be sequentially supplied from the uppermost hot water storage tank 7A to the load side through the hot water supply pipe 9A. At this time, if necessary, the temperature can be adjusted by a mixing valve 10A provided in the hot water supply pipe 9A to supply hot water (hot water supply A). By supplying hot water from the hot water storage tank 7A at the most upstream side, low temperature water is supplied to the hot water storage tank 7C at the downstream side through the water supply pipe 8, and the hot water in the hot water storage tanks 7B and 7C is indicated by solid arrows in FIG. As shown in the figure, as described above, the hot water supply hot water storage tank 7A is sequentially pushed out to the upstream side.

  At the same time, it is possible to supply hot water (hot water supply C) from the uppermost part of the most downstream hot water storage tank 7C via the hot water supply pipe 9C to the load side. The hot water discharged from the hot water storage tank 7C at the most downstream side to the hot water supply pipe 9C is mixed with the low temperature water from the water supply pipe 11C by the mixing valve 10C provided in the hot water supply pipe 9C to become intermediate or low temperature water. After the temperature is adjusted, hot water is supplied to the load side. At this time, low-temperature water corresponding to the amount of hot water discharged from the hot water storage tank 7C is supplied to the hot water storage tank 7C through the water supply pipe 8, and all the high-temperature water stored in the hot water storage tank 7C is consumed. Then, hot water cannot be supplied from the hot water storage tank 7C via the hot water supply pipe 9C.

  Similarly, the hot water storage tank 7A, the hot water storage tank 7B, the hot water storage tank 7B, the hot water storage tank 7C, the hot water storage tank 7A, the hot water storage tank 7B, and the hot water storage tank 7C can be used simultaneously or individually for hot water of two or more different temperatures for multiple applications. Even if all the hot water stored in the hot water storage tanks 7B and 7C is exhausted by supplying hot water from the hot water storage tanks 7B and 7C on the downstream side, It is possible to secure a required amount of high-temperature water for the hot water storage tank 7A and supply it to a specific application.

  Thus, according to the present embodiment, hot water is supplied from the hottest hot water storage tank 7A in the plurality of hot water storage tanks 7A, 7B, 7C connected in series, and one or more hot water storage tanks downstream thereof. By supplying hot water of different temperatures from the 7B and 7C via the mixing valves 10B and 10C, at least two different temperatures from the single hot water storage hot water supply system 1 can be used without using a dedicated two-temperature hot water storage tank. Hot water can be taken out simultaneously or individually and hot water can be supplied to the load side.

In addition, by taking out the middle temperature water and the low temperature water from the one or more hot water storage tanks 7B, 7C via the mixing valves 10B, 10C, the required amount of hot water is stored in the hot water storage hot water storage tank 7A. The hot water stored in the hot water storage tanks 7B and 7C on the downstream side can be successively supplied and consumed.
For this reason, using a plurality of tanks 7A, 7B, and 7C with a simple configuration dedicated to hot water storage without using a specially configured tank, hot water at two or more different temperatures depending on the application can be taken out simultaneously or individually. Thus, it is possible to provide an inexpensive hot water storage hot water supply system 1 that can supply hot water, and to provide a hot water storage hot water supply system 1 that can reliably secure a required amount of high-temperature water whose use is specified.

  In the present embodiment, the mixing valves 10B and 10C are connected to the water supply pipes 11B and 11C branched from the water supply pipe 8 connected to the bottom of the water supply hot water storage tank 7C. When hot water is supplied from the tanks 7B and 7C to the load side, low temperature water is supplied to the mixing valves 10B and 10C through the water supply pipes 11B and 11C branched from the water supply pipe 8, and adjusted to medium temperature water or low temperature water at the set temperature. Since hot water can be supplied, the required amount of high-temperature water is secured in the hot water storage hot water tank 7A, and the hot water storage tank 7B on the downstream side is independent from the hot water supply from the hot water hot water storage tank 7A. Hot water having different temperatures can be taken out simultaneously or individually from 7C and hot water can be supplied to the load side.

  Further, hot water can be supplied from the hottest hot water storage tank 7A, and hot water having different temperatures can be supplied from one or more hot water storage tanks 7B, 7C downstream of the hot water storage tank 7A. Since the hot water can be supplied simultaneously or individually, the hot water from the most hot water storage hot water tank 7A can be obtained simply by connecting a plurality of simple hot water storage tanks 7A, 7B, 7C dedicated for hot water storage in series. Hot water having different temperatures from the one or more hot water storage tanks 7B, 7C on the downstream side can supply hot water having at least two different temperatures simultaneously or individually.

  This makes it possible to use different hot water storage tanks 7A, 7B, and 7C having a simple structure dedicated to existing hot water storage without using an expensive hot water storage tank for taking out two temperatures by using a dedicated structure. It is possible to provide a hot water storage hot water supply system 1 that can take out hot water having two or more different temperatures at the same time or separately at low cost.

  The plurality of hot water storage tanks 7A, 7B, and 7C are dedicated hot water storage tanks having the same structure. For this reason, a plurality of hot water storage tanks 7A, 7B, 7C connected in series can be configured by tanks 7A, 7B, 7C having the same structure dedicated to hot water storage with an existing simple configuration. It is possible to provide a hot water storage type hot water supply system 1 using a plurality of dedicated hot water storage tanks having the same structure and taking out hot water of two or more different temperatures at the same time or individually according to different uses at lower cost.

  In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably. For example, in the above-described embodiment, the example in which the mixing valve 10A is provided in the hot water supply pipe 9A connected to the most upstream hot water storage tank 7A and the temperature can be adjusted has been described. In the case of using the high-temperature water of the set temperature stored in 7C as it is, it is not necessary to provide the mixing valve 10A and may be omitted. It goes without saying that such a system is also included in the present invention.

DESCRIPTION OF SYMBOLS 1 Hot water storage type hot water supply system 2 Heat source machine 3 Hot water storage unit 4 Hot water hot water supply piping 5 Low temperature water supply piping 6A, 6B Connection piping 7A, 7B, 7C Hot water storage tank 8 Water supply piping 9A, 9B, 9C Hot water supply piping (hot water supply system)
10A, 10B, 10C Mixing valve 11A, 11B, 11C Water supply piping

Claims (4)

In a hot water storage hot water system that stores hot water generated by a heat source machine in a hot water storage tank and can supply hot water to the load side sequentially,
Between the hot water outlet piping from the heat source unit and the low temperature water supply piping to the heat source unit, a plurality of the hot water storage tanks are connected in series by connection piping ,
In the plurality of hot water storage tanks, the hottest hot water storage tank closest to the hot water supply pipe from the heat source machine is a hot water hot water storage hot water tank, and the most downstream hot water storage tank is a hot water storage tank for hot water supply to the heat source machine,
A hot water supply system is connected to the uppermost hot water storage tank, and hot water having different temperatures is supplied to the connection pipe connected to the upper part of one or more hot water storage tanks downstream of the hot water supply system via a mixing valve. A hot water storage type hot water supply system characterized in that one or more possible hot water supply systems are connected.   The hot water storage hot water supply system according to claim 1, wherein a water supply pipe branched from a water supply pipe connected to a bottom portion of the water supply hot water storage tank is connected to the mixing valve.   Hot water can be supplied from the hot water storage tank at the most upstream side, and hot water of different temperatures can be supplied from one or more of the hot water storage tanks downstream from the hot water storage tank. The hot water storage hot water supply system according to claim 1, wherein the hot water supply system is configured to be capable of supplying hot water individually. The hot water storage hot water supply system according to any one of claims 1 to 3, wherein each of the plurality of hot water storage tanks is a dedicated hot water storage tank having the same structure.

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