JP2013113494A - Hot water supply unit, and water heater including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water supply unit in which composition apparatuses such as a heat pump for making hot water and an instantaneous water heater can be installed with excellent space efficiency, workability, and appearance.SOLUTION: The hot water supply unit U1 includes the heat pump 1 for making hot water, the instantaneous water heater 2, a plurality of main piping members 4A and 4B respectively connected to water entrances 15a and 25a and tap holes 15b and 25b of the heat pump 1 and the instantaneous water heater 2 and respectively provided with piping connection ports 40a and 40b for piping connection of a hot water storage tank 5, and a rack 3 for device installation. The rack 3 includes a base part 30 where the heat pump 1 is mounted and an erected part 31 erected upwards from the base part 30, and the instantaneous water heater 2 and the plurality of main piping members 4A and 4B are attached to the erected part 31.

Description

  The present invention relates to a hot water supply unit configured by combining a heat pump for heating hot water and an instantaneous water heater, and a hot water supply apparatus including the hot water supply unit.

  The present applicant has previously proposed one described in Patent Document 1 as an example of a hot water supply apparatus. The hot water supply apparatus described in the document is a hot water supply apparatus that combines a hot water heating function heat pump and a hot water storage tank, and further includes an instantaneous water heater. According to such a configuration, normally, hot water that is heated using a heat pump and stored in a hot water storage tank is preferentially used. On the other hand, when the hot water storage tank is out of hot water, the instantaneous water heater can be operated to quickly generate hot water at a desired temperature, and the hot water supply operation can be continued.

When installing the hot water supply device described above, it is necessary to install a heat pump and an instantaneous water heater in addition to the hot water storage tank. Conventionally, these devices are put together in a space-efficient and good-looking state. No technology has been proposed for installation. In the past, the actual situation was that the heat pump and the instantaneous water heater were individually installed and connected to each other by piping.
However, when such an installation mode is adopted, the operation of installing the heat pump and the instantaneous water heater in a separate place is complicated, and the piping operation for connecting them to each other is also complicated. In addition, the installation space for the entire hot water supply apparatus is increased. Furthermore, the components of the hot water supply device and the piping members that connect them are arranged unevenly, resulting in a problem that the overall appearance deteriorates.
In many cases, hot water supply devices used in hotels, restaurants and the like have to have a considerably large hot water supply capacity as compared with hot water supply devices for general households. As means for this, it is conceivable to increase the number of heat pumps and instantaneous water heaters and use them by connecting them in series. However, when the number of heat pumps and instantaneous water heaters is increased in this way, the above-described problems become more prominent.
Conventionally, as described in Patent Document 2, for example, a frame for providing a plurality of instantaneous water heaters side by side has been proposed. However, such a pedestal is merely an instantaneous water heater as an installation target device, and when a heat pump is further installed, it is necessary to use a dedicated pedestal or pedestal. Therefore, with the means described in Patent Document 2, it is difficult to properly solve the above-described problems.

JP 2004-125226 A Japanese Patent No. 2767500

  The present invention has been conceived under the circumstances as described above, and the components such as a heat pump for hot water heating and an instantaneous water heater have good space efficiency and workability, and also have a good appearance. It is an object of the present invention to provide a hot water supply unit that can be installed in a simple state and a hot water supply device including the hot water supply unit.

  In order to solve the above problems, the present invention takes the following technical means.

  A hot water supply unit provided by the first aspect of the present invention includes at least one heat pump for hot water heating, at least one instantaneous water heater, and a water inlet of each of the heat pump and the instantaneous water heater, and A plurality of main outlets connected to the hot water outlet indirectly via an auxiliary piping member or directly connected without an auxiliary pipe member and having a pipe connection port for pipe connection to a desired pipe connection target device A hot water supply unit comprising a piping member and a device installation stand, wherein the stand has a base portion on which the heat pump is placed, and an upright portion rising upward from the base portion. In addition, the instant water heater and the plurality of main piping members are attached to the standing portion.

  According to such a configuration, the heat pump, the instantaneous water heater, and a plurality of main piping members for connecting these water inlets and outlets are installed on one pedestal. Figured. Therefore, compared with the case where it installs in a separate place in a heat pump and an instantaneous water heater, and these are connected by piping, installation work of each component apparatus is facilitated. In addition, the entire space can be saved, and the constituent devices can be arranged in an orderly manner, so that the overall appearance can be improved. Since heat pumps are generally larger in size and heavier than instantaneous water heaters, heat pumps are installed at the base of the gantry, and instantaneous water heaters and multiple instantaneous If it is set as the structure which attached the water heater, the stability of the whole unit can be improved and it can also be made excellent in earthquake resistance etc.

  In the present invention, preferably, the instantaneous water heater is disposed above the heat pump, and the plurality of main piping members are disposed between the instantaneous water heater and the heat pump. .

  Such a configuration is advantageous in reducing the occupied area of the entire unit as compared to, for example, a case where an instantaneous water heater is provided beside the heat pump. In addition, if a plurality of main piping members are arranged between the heat pump and the instantaneous water heater, the distance from the main piping members to the inlet and outlet of the heat pump and main piping members is shortened, and the piping structure This simplifies the process and facilitates the piping work.

In the present invention, preferably, the instantaneous water heater is disposed on the opposite side of the heat pump with the upright portion interposed therebetween, and the plurality of main piping members are disposed below the instantaneous water heater. It is arranged.
In such a configuration, more preferably, at least a part of the instantaneous water heater and the heat pump overlap in the vertical height direction.

  According to such a structure, compared with the case where it arrange | positions in the state which accumulated the instantaneous water heater and the main piping member on the upper side of the heat pump, the whole height shall be lowered and the whole shall be stabilized. Is possible. In particular, when the instantaneous water heater and the heat pump are overlapped, it is more preferable to suppress an increase in the height of the entire unit.

  In the present invention, preferably, the plurality of main piping members extend in the left-right width direction of the gantry, and both longitudinal ends thereof are configured as first and second piping connection ports as the piping connection ports. A hot water storage tank as the pipe connection target device is connected to the first pipe connection port, and another hot water supply unit is connected to the second pipe connection port as the pipe connection target device, Alternatively, another hot water supply unit can be connected to each of the first and second piping connection ports.

According to such a configuration, it is easy to prepare a plurality of hot water supply units according to the present invention and connect the plurality of hot water supply units in series to connect to the hot water storage tank.
Therefore, it is preferable for constructing a hot water supply apparatus having a large hot water supply capacity suitable for use in restaurants, hotels, and the like.

  The hot water supply apparatus provided by the second aspect of the present invention includes hot water heating means, and a hot water storage tank connected to the hot water heating means and capable of storing hot water heated by the hot water heating means. The hot water supply apparatus is characterized in that the hot water supply unit provided by the first aspect of the present invention is used as the hot water heating means.

  According to such a configuration, the same effect as described for the hot water supply unit provided by the first aspect of the present invention can be obtained.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

(A) is a schematic front view which shows an example of the hot water supply apparatus provided with the hot water supply unit which concerns on this invention, (b) is Ib-Ib sectional drawing of (a). It is a disassembled perspective view of the hot water supply unit shown in FIG. It is a schematic front view which shows the example which expanded the hot water supply unit in the hot water supply apparatus shown in FIG. (A) is a schematic front view which shows the other example of the hot water supply apparatus provided with the hot water supply unit which concerns on this invention, (b) is IVb-IVb sectional drawing of (a). It is a schematic front view which shows the example which added the hot water supply unit in the hot water supply apparatus shown in FIG.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  The hot water supply device A1 shown in FIG. 1 is configured by combining a hot water supply unit U1 and a hot water storage tank 5. The hot water supply unit U1 includes one heat pump for hot water heating, two instantaneous water heaters 2, main piping members 4A and 4B for incoming and outgoing hot water, and a base 3 for installing them.

  As shown in FIG. 2, the gantry 3 is configured by using a flat plate shape, an L-shaped cross section, a square pipe material, or the like in order to reduce the overall weight. (The main piping members 4A and 4B are omitted in FIG. 2). The base portion 30 has a frame shape or a shape close to this, but has one or a plurality of flat portions 30a whose upper surface is flat, and the heat pump 1 is mounted on the flat portion 30a. Placed stably. The heat pump 1 is fixed to the base portion 30 by using a plurality of holes 32 provided in the flat surface portion 30a and a screw body 92 that is screwed or inserted into these holes. The base portion 30 is provided with a bracket portion 33 having a plurality of hole portions 33a. By inserting anchor bolts (not shown) into the plurality of hole portions 33a and driving them, the pedestal 3 is made of a predetermined concrete. It can be fixed to the foundation or the ground. This prevents the gantry 3 from being displaced or overturned.

The standing portion 31 of the gantry 3 is formed by standing a plurality of square pipe materials on the base portion 30. Bracket portions 34 and 35 extending in the left-right width direction of the gantry 3 are provided at the uppermost portion and the intermediate height portion of the standing portion 31. The bracket portions 34 and 35 are provided with a plurality of holes 36 a and 36 b for bolting the instantaneous water heater 2. The lower bracket portion 35 is configured using, for example, a member having an L-shaped cross section, and has a horizontal plate portion 35 a that protrudes toward the front surface of the gantry 3. The instantaneous water heater 2 is a so-called wall-hanging type, and is fixed to the bracket portions 34 and 35 using a plurality of screw bodies 96a and the like with the lower portion locked to the horizontal plate portion 35a. As shown in FIG. 1, the two instantaneous water heaters 2 are arranged side by side on the left and right sides, but their positions are directly above the heat pump 1. The width of the instantaneous water heater 2 is, for example, about ½ of the width of the heat pump 1, and the two instantaneous water heaters 2 are set so as not to protrude greatly from the position directly above the heat pump 1.

  The main piping members 4A and 4B are main members for piping the heat pump 1 and the two instantaneous water heaters 2 to the hot water storage tank 5, and are located between the heat pump 1 and the two instantaneous water heaters 2. In this way, it is fixedly attached to the standing part 31 of the gantry 3. As a means for attaching the main piping members 4A and 4B, for example, a metal tube holding metal fitting having an Ω shape or a substantially semicircular shape can be used. The main piping members 4A and 4B extend in the left-right width direction of the gantry 3, and both end portions thereof are configured as first piping connection ports 40a and 40b and second piping connection ports 41a and 41b. . The second pipe connection ports 41a and 41b are for connecting other hot water supply units having the same configuration as in this embodiment (described later with reference to FIG. 3). In this embodiment, an appropriate lid is used. It is blocked using a material (not shown). The first pipe connection ports 40 a and 40 b are connected to the pipe parts 50 and 51 of the hot water storage tank 5.

The heat pump 1 includes, for example, an evaporator 10 that absorbs heat from air taken in using a fan 10a in a circulation path of a refrigerant such as CO ₂ , a compressor 11, a hot water heating heat exchanger 12 as a condenser, and A thermal expansion valve 13 is provided. The water inlet 15 a and the hot water outlet 15 b of the heat pump 1 are branched and connected to the main piping members 4 </ b> A and 4 </ b> B via the auxiliary piping member 45. The auxiliary piping member 45 connected to the water inlet 15a is provided with an on-off valve V1. However, this on-off valve V1 can also be configured to be built in the heat pump 1, like an on-off valve V1 in FIG.

  Each instantaneous water heater 2 includes, for example, a burner 20 that combusts fuel gas, a heat exchanger 21 that performs heat recovery from the combustion gas generated by the burner 20 and performs hot water heating, and the heat exchanger 21. There is an on-off valve V2 that can turn on and off the supply of hot water. The water inlet 25 a and the hot water outlet 25 b connected to the heat exchanger 21 are branched and connected to the main pipe members 4 </ b> A and 4 </ b> B through the auxiliary pipe member 45. The gas pipe 6 for supplying the fuel gas to the burner 20 is attached to the standing part 31 of the gantry 3 so as to be arranged above the main piping members 4A and 4B. The main tube portion of the gas pipe 6 extends in the left-right lateral direction of the gantry 3 and both ends thereof are configured as connection ports for the gas pipe. Of course, in this embodiment, the connection port (gas non-supply side) on one end side of the gas pipe 6 is closed so as not to cause gas leakage.

  The hot water storage tank 5 is for storing hot water heated by using the hot water supply unit U1, and a water inlet is provided at the lower part of the hot water storage tank 5 in addition to the pipe portion 50 having the pump P1 and the on-off valve V3. A water supply piping section 52 having 52a is connected. As a result, when the on-off valve V3 is closed, the hot water supplied to the water inlet 52a can flow into the hot water storage tank 5. If the pump P1 is driven with the on-off valve V3 open, the hot water in the hot water storage tank 5 can be sent from the piping 50 to the main piping member 4A. At this time, if the on-off valve V1 is opened, water enters the heat pump 1 and hot water heating using the heat pump 1 is possible. Further, when the on-off valve V2 is opened, water enters the instantaneous water heater 2, and hot water heating using the instantaneous water heater 2 is possible.

The upper part of the hot water storage tank 5 is connected to a piping part 51 and a hot water piping part 53 via a three-way valve V4. For this reason, the hot water heated by the heat pump 1 or the instantaneous water heater 2 can be introduced into the hot water storage tank 5 from the main piping member 4B via the piping portion 51. Further, when the three-way valve V4 is switched, unlike the above, the hot water passing through the pipe part 51 is led to the hot water pipe part 53 without flowing into the hot water storage tank 5, and directly supplied to a desired hot water supply destination. It is also possible. The hot water supply device A1 includes a controller (not shown) that performs overall control of the operation of each unit described above.

  Next, the operation of the hot water supply device A1 will be described.

  First, the hot water supply unit U1 has one heat pump 1 and two instantaneous water heaters 2 as hot water heating means, and it is possible to appropriately switch which of these is operated. For this reason, for example, the running cost can be reduced by causing the heat pump 1 to bear the warm water generating operation in the normal time. On the other hand, for example, when the hot water supply load suddenly changes and there is a possibility of running out of hot water, both or one of the two instantaneous water heaters 2 is operated to serve as an auxiliary heat source machine, and the risk of running out of hot water appropriately It is possible to avoid it. As means for increasing the hot water supply capacity, unlike the present embodiment, for example, it is possible to use two heat pumps 1 without using the instantaneous water heater 2, but according to such a configuration, The purchase cost of the two heat pumps 1 is expensive. Compared with this, the configuration of the present embodiment with one heat pump 1 and two relatively inexpensive instantaneous water heaters 2 can make the entire apparatus inexpensive.

  In addition to the heat pump 1 and the instantaneous water heater 2, the hot water supply unit U <b> 1 is configured such that the main pipe members 4 </ b> A and 4 </ b> B that connect these pipes are also installed on one frame 3. For this reason, for example, compared with the case where the above-described component devices are separately installed on a plurality of mounts, the entire component devices are consolidated in a space-efficient manner, and the occupied area (installation area) of the hot water supply unit U1 and thus the water heater A1 The total occupied area can be reduced. Moreover, the operation | work which pipe-connects the heat pump 1 and the instantaneous water heater 2 is also facilitated. In particular, in this embodiment, since the main piping members 4A and 4B are located between the heat pump 1 and the instantaneous water heater 2, the main piping members from the heat pump 1 and the instantaneous water heater 2 respectively. The distance to 4A and 4B is short, and these pipe connection workability | operativity also becomes favorable. Furthermore, since the heat pump 1, the instantaneous water heater 2, and the main piping members 4A and 4B are arranged in an orderly manner, the overall appearance is good. Furthermore, among these devices, the heat pump 1 having the largest weight is provided at a low position, and thus the stability is good.

  For example, as shown in FIG. 3, the hot water supply device A1 can be changed to a hot water supply device A1 'having an additional hot water supply unit U1'. More specifically, the hot water supply unit U1 'has substantially the same configuration as the hot water supply unit U1 (the same components are denoted by the same reference numerals). The two hot water supply units U1, U1 ′ are arranged side by side, and the second pipe connection ports 41a, 41b of the hot water supply unit U1 and the first pipe connection ports 40a, 40b of the hot water supply unit U1 ′ are directly connected, Alternatively, it is indirectly connected via an appropriate piping member (not shown). Thus, in addition to the hot water supply unit U1, the heat pump 1 and the instantaneous water heater 2 of the hot water supply unit U1 'are also indirectly connected to the hot water storage tank 5 by piping. In the hot water supply apparatus A1 ', the operation control of each part of the hot water supply units U1 and U1' is controlled by a predetermined controller (not shown) together with the hot water storage tank 5.

According to the hot water supply apparatus A1 ′ described above, it is possible to further improve the hot water supply capacity as compared with the hot water supply apparatus A1. When such hot water supply capacity is improved, the installation work of the hot water supply unit U1 ′ and the pipe connection work to the hot water supply unit U1 are easy, which is preferable for suppressing an increase in installation work costs. Moreover, since the hot water supply units U1 and U1 ′ can be arranged in an orderly manner, the overall appearance can be maintained in a good state. In FIG. 3, only one hot water supply unit U1 ′ is added, but instead of this, a configuration in which a plurality of hot water supply units U1 ′ are added (another hot water supply unit is placed next to the hot water supply unit U1 ′ shown in FIG. 3). Further, the main pipe members of the other hot water supply units may be connected to the second connection ports 41a and 41b of the hot water supply unit U1 ′.

  4 and 5 show another embodiment of the present invention. In these drawings, elements that are the same as or similar to those in the above embodiment are given the same reference numerals as in the above embodiment.

  The hot water supply device A2 shown in FIG. 4 has a configuration in which a hot water supply unit U2 is connected to the hot water storage tank 5 by piping. The hot water supply unit U2 has a configuration in which the heat pump 1 is installed on the base portion 30 of the gantry 3 and the instantaneous water heater 2 is installed on the upright portion 31, which is well illustrated in FIG. As described above, the instantaneous water heater 2 is provided on the opposite side of the heat pump 1 with the upright portion 31 interposed therebetween. However, the portion near the lower portion of the heat pump 1 overlaps the portion near the upper portion of the heat pump 1 by an appropriate dimension L1 in the vertical height direction. Further, the instantaneous water heater 2 is arranged so as to be offset from the intake port 16 in front view so as not to block the front of the intake port 16 (or the exhaust port, the same applies hereinafter) of the fan 10a of the heat pump 1. Yes.

  The main piping members 4 </ b> A and 4 </ b> B and the gas pipe 6 are attached to the standing portion 31 of the gantry 3 so as to be positioned below the instantaneous water heater 2. The intake direction of the fan 10a of the heat pump 1 is preferably the direction in which the main piping members 4A and 4B are upstream of the heat pump 1 as shown by the arrow N1 in FIG. According to such a configuration, it is possible to prevent the air exhausted from the heat pump 1 from hitting the main piping members 4A and 4B. When the air hits the main piping members 4A and 4B, the main piping members 4A and 4B and hot water flowing through the inside may be cooled. However, according to the above configuration, such a risk can be avoided. Is possible. However, the intake / exhaust direction of the heat pump 1 may be different from the present embodiment. In this case, preferably, the main piping members 4A and 4B are configured to be offset as much as possible from the front of the exhaust port of the heat pump 1, and more preferably, the auxiliary piping member 45 is also configured to be offset.

  In the present embodiment, the instantaneous water heater 2 and the main piping members 4A and 4B are not arranged above the heat pump 1, which is advantageous in reducing the overall height of the hot water supply unit U2. As the heat pump 1, a large and tall one may be used. In such a case, it is more preferable to suppress the overall height of the hot water supply unit U2. Moreover, since the heat pump 1 and the instantaneous water heater 2 are overlapped in the vertical height direction as described above, it is possible to further suppress the overall height of the hot water supply unit U2.

  A hot water supply device A2 'shown in FIG. 5 is obtained by adding a hot water supply unit U2' to the hot water supply device A2 shown in FIG. The hot water supply unit U2 ′ has substantially the same configuration as the hot water supply unit U2, and the first pipe connection ports 40a and 40b of the hot water supply unit U2 ′ are connected to the second pipe connection ports 41a and 41b of the hot water supply unit U2. Has been. According to such a configuration, since the hot water supply unit U2 'is added, the entire hot water supply capacity is improved. In the embodiment shown in FIGS. 3 and 5, a plurality of hot water supply units having substantially the same configuration are connected side by side. However, when a plurality of hot water supply units are connected and used, the present invention is not limited to this. For example, the hot water supply unit U2 shown in FIG. 4 is added to the hot water supply apparatus A1 shown in FIG. 1, or the hot water supply unit U1 shown in FIG. 1 is added to the hot water supply apparatus A2 shown in FIG. It is also possible.

  The present invention is not limited to the contents of the above-described embodiment. The specific configuration of each part of the hot water supply unit according to the present invention and the hot water supply apparatus including the hot water unit can be variously modified within the scope intended by the present invention.

The heat pump should just be the structure in which hot water heating is possible by a heat pump system. The instantaneous water heater may be an oil combustion type having an oil burner, for example, instead of the gas burner. As will be understood from the embodiment shown in FIGS. 4 and 5, in the present invention, one or more heat pumps for hot water heating and one instant water heater need only be installed on one frame. And the specific number of instantaneous water heaters is not limited. Moreover, the specific size etc. of a heat pump and an instant water heater are not ask | required.

  The “main piping member” as used in the present invention is a main piping member for making water into and out of the heat pump and the instantaneous water heater, and pipe connection for pipe connection to a desired pipe connection target device. A piping member having a mouth. Here, a specific example of the pipe connection target device is a hot water storage tank, but as can be understood from the embodiment shown in FIG. 3 and FIG. 5, another hot water supply unit may be the pipe connection target device. it can. The main piping member does not necessarily have to be connected to the water inlet and outlet of the heat pump or instantaneous water heater via the auxiliary piping member, and corresponds to, for example, the second pipe connection ports 41a and 41b. It is also possible to adopt a configuration in which the portion is directly connected to the water inlet or outlet of the heat pump or instantaneous water heater. Although the main piping member is installed in the standing part of the gantry, the specific fixing means for that purpose is not particularly limited.

  The “base” in the present invention has a base portion and an upright portion standing up from the base portion, and the base portion only needs to be able to mount a heat pump. The standing part should just be able to attach an instantaneous water heater and a main piping member. Specific shapes, sizes, materials, and the like of the base portion and the standing portion are not limited. In the above-described embodiment, the base portion and the upright portion are connected in an inverted T-shape when viewed from the side (see, for example, FIG. 1B), but instead are connected, for example, in an L-shape when viewed from the side. It can also be configured.

A1, A1 'Hot water supply device A2, A2' Hot water supply device U1, U2 Hot water supply unit 1 Heat pump 2 Instantaneous water heater 3 Base 4A, 4B Main piping member 5 Hot water storage tank (Pipe connection target equipment)
15a Water inlet (for heat pump)
15b Outlet (for heat pump)
25a Water inlet (for instantaneous water heater)
25b Outlet (for instantaneous water heater)
30 Base (for the base)
31 Standing part (for the stand)
40a, 40b First pipe connection port (pipe connection port)
41a, 41b Second pipe connection port (pipe connection port)
45 Auxiliary piping members

Claims (6)

At least one heat pump for hot water heating;
At least one instantaneous water heater;
The heat pump and the instantaneous water heater are respectively connected indirectly to the water inlet and outlet through the auxiliary piping member, or directly connected without the auxiliary pipe member, and the desired pipe connection target. A plurality of main pipe members having pipe connection ports for pipe connection to equipment;
A stand for equipment installation;
A hot water supply unit comprising:
The gantry has a base portion on which the heat pump is placed, and an upright portion standing upward from the base portion, and the instantaneous water heater and the plurality of main piping members are attached to the upright portion. A hot water supply unit characterized by The hot water supply unit according to claim 1,
The instantaneous water heater is disposed above the heat pump, and the plurality of main piping members are disposed between the instantaneous water heater and the heat pump. The hot water supply unit according to claim 1,
The instantaneous water heater is disposed on the opposite side of the heat pump with the upright portion interposed therebetween, and the plurality of main piping members are disposed below the instantaneous water heater. . The hot water supply unit according to claim 3,
The instantaneous water heater and the heat pump are hot water supply units in which at least a part of them overlaps in the vertical height direction. The hot water supply unit according to any one of claims 1 to 4,
The plurality of main piping members extend in the left-right width direction of the gantry, and both longitudinal ends thereof are configured as first and second piping connection ports as the piping connection ports,
A configuration in which a hot water storage tank as the pipe connection target device is connected to the first pipe connection port, and another hot water supply unit is connected to the second pipe connection port as the pipe connection target device, or the first A hot water supply unit that is configured to connect another hot water supply unit to each of the first and second pipe connection ports. Hot water heating means,
A hot water storage tank connected to the hot water heating means and capable of storing hot water heated by the hot water heating means,
A hot water supply device comprising:
A hot water supply apparatus using the hot water supply unit according to any one of claims 1 to 5 as the hot water heating means.

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