JP5520106B2 - Hot water supply unit - Google Patents

Description

  The present invention relates to a hot water supply unit including a hot water storage tank that is used in a house, an apartment house, and the like and stores hot water heated by heating means.

2. Description of the Related Art Conventionally, there is known a hot water supply unit that stores hot water heated by a heating means such as a heat pump device in a hot water storage tank and supplies hot water to a residential pipe.
In addition, there is also known a system in which energy is further saved by introducing hot water heated by solar heat to the hot water supply unit (see, for example, Patent Document 1).

JP 2010-14316 A

  However, in the hot water supply unit as described above, since the hot water storage tank is installed on the ground, a site for installing the hot water supply unit is required. In particular, when installing hot water supply units independently in each apartment in an apartment house, the number of hot water supply units installed increases and the required site area increases. In addition, in a laminated house, when hot water is supplied to the second floor or more, it is necessary to pressurize and supply hot water from the hot water supply unit.

  The present invention aims to solve the above-described problems, and provides a hot water supply unit that enables the installation of a hot water supply unit without expanding the site area and that can suppress the pressure resistance performance. With the goal.

  In order to achieve the above object, the present invention is connected to a hot water storage tank for storing hot water, a heating device in which a heater for heating the water in the hot water storage tank is installed at the bottom of the tank, and the hot water storage tank, A hot water supply unit comprising a water supply pipe for supplying water into the hot water storage tank and a hot water supply pipe for supplying hot water in the hot water storage tank into the building, wherein the hot water storage tank has an upper and lower surface larger than the side surface. The hot water storage tank is formed in a shape and is inclined on the roof of the building by placing one end of the upper surface above the other end and inclining, and includes the heating device between the roof and the roof. It was set as the hot water supply unit characterized by forming the installation space of an apparatus and being installed.

The invention according to claim 2 is the hot water supply unit according to claim 1, wherein the hot water storage unit is provided so as to cover the upper surface of the hot water storage tank and collect solar heat, and is provided at the lower part of the hot water storage tank. A solar heat collecting device having a heat radiator that radiates heat by circulating a heat medium heated by the heat collector is provided.
The invention according to claim 3 is the hot water supply unit according to claim 2, wherein a solar cell module of a solar power generator is provided to cover the heat collector of the solar heat collector, The solar light is formed so as to be able to pass through the heat collector, and is supported by the heat collector and held in shape.
The invention according to claim 4 is the hot water supply unit according to any one of claims 1 to 3, wherein the water supply pipe and the hot water supply are at a position where the upper part of the roof is covered with the hot water storage tank. A pipe is routed through the roof and into the building.
The invention according to claim 5 is the hot water supply unit according to any one of claims 1 to 4, wherein the heating device is an air heat exchanger that heats a heat medium by exchanging heat with outside air. A heat pump device having a water heat exchanger that sends and dissipates heat by the heat medium heated by the air heat exchanger, and the water heat exchanger of the heat pump device is used as the heater. To do.
A sixth aspect of the present invention is the hot water supply unit according to any one of the first to fourth aspects, wherein the heating device is provided so as to cover an upper surface of the hot water storage tank, collects solar heat, and A heat collector for performing heat exchange to heat the low-temperature low-pressure gaseous heat medium, and a pressurizer for pressurizing the gaseous heat medium heated by the heat collector to form a high-pressure high-temperature gaseous heat medium; A radiator that is provided at the bottom of the hot water storage tank and radiates heat of the high-pressure high-temperature gaseous heat medium sent from the pressurizer, and expands the gaseous heat medium radiated by the radiator A pressurization type heat pump device having an expansion valve in a low-pressure gas state is provided, and a radiator of the pressurization type heat pump device is used as the heater.
The invention according to claim 7 is the hot water supply unit according to any one of claims 1 to 5, wherein the roof is a flat roof.

In the hot water supply unit of the present invention, since the hot water storage tank is installed on the roof, a site for installing the hot water supply unit is unnecessary, and in particular, the site area required when installing a plurality of hot water supply units can be greatly reduced. it can.
Moreover, since the hot water supply unit installs the hot water storage tank on the roof, it is possible to use gravity when hot water is supplied. Therefore, even when hot water is supplied to the second floor or higher, pressurization is unnecessary or the applied pressure can be suppressed, and the pressure resistance performance of the hot water storage tank and the hot water supply pipe can be suppressed.
In addition, the hot water storage tank is slanted so that the top and bottom surfaces are wider than the side, so that compared to the conventional installation of a rectangular parallelepiped or cylindrical tank on the rooftop, the overall capacity is secured while the rooftop height is secured. Compared with a hot water storage tank that is installed almost horizontally, it is possible to install a hot water storage tank in an almost horizontal position, and promote natural convection to collect low-temperature water at the bottom of the tank and efficiently heat it with a heater. In addition, it is possible to ensure a stable hot water supply by securing the water level of the hot water portion at the upper part of the tank.
In addition, since an installation space is formed between the hot water storage tank and the roof, it is possible to compactly install the equipment including the heating device, and to reduce the roof area necessary for installing the hot water supply unit.

Furthermore, in the hot water supply unit according to claim 2, since the solar heat collecting device is provided in parallel with the heating device, the hot water can be heated by solar heat during the daytime when sunshine is obtained, which is excellent in economic efficiency.
In addition, since the solar collector is installed on a flat hot water storage tank, it is necessary for installation compared to the solar collector installed in parallel in the horizontal direction of the hot water tank. A compact installation is possible with a reduced area on the roof, and a large installation area for the heat collector can be secured.

Furthermore, in the invention according to claim 3, since the solar power generation device is provided, not only hot water supply but also power generation using sunlight is possible, and the energy saving performance can be further improved. In addition, since the solar power generation module is installed on the heat collector, the rooftop area required for installation is reduced compared with the case where the solar power generation module is installed in parallel in the horizontal direction of the hot water tank. Installation is possible, and the support member that holds the shape of the solar power generation module with the heat collector can also be used, so that the support member dedicated to the solar power generation module can be eliminated, reducing the weight and cost. Can be planned.
In addition, by allowing the solar power generation module to transmit sunlight to the heat collector, it is possible to collect heat by the heat collector even if the solar power generation module is stacked on the heat collector.

  Further, in the invention according to claim 4, since the part where the water supply pipe and the hot water supply pipe penetrate the roof is the position covered with the hot water storage tank, the penetration part is not covered with the hot water storage tank. In comparison, it is possible to improve the performance of preventing rainwater from entering the building.

  Moreover, in the invention described in claim 5, since the heat pump device is used as the heating means, the water in the hot water storage tank can be heated by the thermal energy of the outside air, which is excellent in economic efficiency. In particular, when the solar heat collecting apparatus according to claim 2 is installed in parallel, the solar heat collecting apparatus is used for heating during the daytime when sunshine is obtained, and the heat pump apparatus is used for heating at night when the sunshine is not obtained. The hot water heating excellent in economic efficiency can be performed throughout the day.

  Further, in the invention according to claim 6, the heat medium is heated by a heat collector that collects solar heat by a pressurized heat pump device during sunshine, so that the heat medium is compared with the one that performs heat exchange with the outside air temperature. Can be heated to high temperatures at low cost. In addition, since the heat collector can cover the upper surface of the hot water storage tank and can be formed in a large area, high heat exchange performance can be ensured without forcibly applying outside air with a fan.

  In the invention according to claim 7, since the roof is a flat land roof, it is easy to secure an installation space between the hot water storage tank and the roof.

It is sectional drawing which shows the outline of a structure of the hot water supply unit A of Embodiment 1 of this invention. It is a perspective view which shows the outline of the whole building which installed the hot water supply unit A of Embodiment 1. FIG. FIG. 6 is a cross-sectional view schematically showing a configuration of a hot water supply unit B according to a second embodiment. FIG. 6 is a cross-sectional view schematically showing a configuration of a hot water supply unit C according to a third embodiment. FIG. 6 is a cross-sectional view schematically showing a configuration of a hot water supply unit D according to a fourth embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
The hot water supply unit A according to the first embodiment will be described in detail with reference to FIGS.

  In describing the hot water supply unit A of the first embodiment, first, a three-story unit building UH in which the hot water supply unit A of the first embodiment is installed will be described with reference to FIG.

  FIG. 2 is a perspective view showing an outline of the unit building UH. The unit building UH joins a plurality of building units U1, U2, U3,. The roof RF is provided on the building unit U3 arranged on the top floor. Note that a flat roof having almost no gradient is used for the roof RF.

  Each building unit U1, U2, U3 is not shown in detail, but steel columns arranged at the four corners and steel beam members BE spanned between the upper and lower ends of the columns (see FIG. 1) to form a box-shaped ramen structure. In the present embodiment, the unit building UH is for an apartment house, and each of the building units U1 to U3 communicates with each other in the direction of the arrow X to form one dwelling. Moreover, each residence is mutually partitioned by the partition wall, ceiling, and floor which abbreviate | omitted illustration in the arrow Y direction and the up-down direction (arrow UP shows upward).

The hot water supply unit A is installed on the roof RF of the unit building UH.
In the first embodiment, an independent hot water supply unit A is installed for each residence, and as shown in the figure, three hot water supply units A are provided in one of the building units U3 arranged on the top floor. They are juxtaposed in the direction of arrow Y. In addition, the building unit U3 in which the hot water supply unit A is installed and the building unit U3 adjacent to the arrow Y direction are respectively beam members (not shown) extending in the arrow X direction of the building unit U3. The pipes connected to each hot water supply unit A (the water supply pipe 14 and the hot water supply pipe 15 shown in FIG. 1) are connected to each other between the building units U1. Between the building units U21 and between the building units U3, the piping in the building is routed through the space between the building units U21 and the residence of the hot water supply below, and does not protrude into the room. Is planned.

Next, details of the hot water supply unit A according to Embodiment 1 will be described with reference to FIG.
The hot water supply unit A includes a hot water storage tank 1, a heat pump device (heating device) 2, a solar heat collecting device 3, a solar power generation device 4, and a pressurizer 5.
The hot water storage tank 1 includes a tank body 11 having a rectangular parallelepiped box shape made of metal or resin having excellent corrosion resistance. The tank body 11 is formed in a flat shape in which the area of the upper surface 11a and the lower surface 11b is larger than the area of the side surface 11c. Specifically, in the first embodiment, the vertical dimension is about 300 mm. It has a capacity of about 400 liters with a length of about 2500 mm in the left-right direction and a width of about 900 mm in the depth direction in the figure. The tank body 11 is entirely covered with a heat insulating material 12 such as foamable resin.

In the first embodiment, the hot water storage tank 1 is inclined about 30 degrees so that the right end is arranged higher than the left end in the upper surface 11a and the lower surface 11b, and is installed between the roof RF and the equipment. The installation space SP is formed, supported by the support member 6, and installed on the roof RF.
The building unit U3 has a width of about 2500 mm in the direction of the arrow X in FIG. 2, and the beam member BE shown in FIG. 1 is provided at both ends of the building unit U3 in the direction of the arrow X. It extends in the direction of arrow Y.

  The support member 6 includes a plurality of leg members 61. The leg members 61 are arranged to overlap the beam member BE in the vertical direction so that the load supported by the support member 6 is supported by the beam member BE. The leg member 61 and the beam member BE are coupled via a connecting member (not shown) that penetrates the roof RF.

  The hot water storage tank 1 has an inspection port 13 opened at the upper end and a water supply pipe 14 connected to the lower end, while a hot water supply pipe 15 is connected to a hot water supply port 15a provided at the upper part. Yes. In addition, each pipe | tube 14 and 15 is collected in one place, penetrates roof RF, and is wired by the dwelling under it with the power lines 43 and 70 mentioned later. The through portions of the pipes 14 and 15 and the power lines 43 and 70 in the roof RF are arranged at positions where they are covered by the hot water storage tank 1 directly below the hot water storage tank 1 and are waterproofed by the waterproof structure portion 7.

  As is well known, the heat pump device 2 is transmitted by an air heat exchanger 21 that exchanges heat with the outside air, and a heat medium in which heat obtained by the air heat exchanger 21 is circulated through a pipe 23. And a water heat exchanger 22 for heating water in the tank body 11 of the hot water storage tank 1. And the main body unit 20 provided with the air heat exchanger 21 and the compressor and expansion valve which abbreviate | omitted illustration is arrange | positioned in installation space SP, and is installed on roof RF. Further, the water heat exchanger 22 is installed in the lower part inside the tank body 11.

The solar heat collecting apparatus 3 includes a heat collector 31, a circulation pipe 32, a radiator (heater) 33, and a circulator 34.
Although the heat collector 31 is provided along the upper surface 11a of the hot water storage tank 1 and illustration is abbreviate | omitted, it is provided with the heat collecting plate which receives sunlight and is heated. The circulation pipe 32 circulates the heat medium between the heat collector 31 and the heat radiator 33. Although not shown in detail, the circulation pipe 32 meanders along the heat collector 31 so as to exchange heat with the heat collection plate. In addition, the heat medium is circulated from the heat collector 31 in the order of the upper part of the heat collector 31 → the lower part of the radiator 33 → the upper part of the radiator 33 → the circulator 34 → the lower part of the heat collector 31. The radiator 33 is installed in the lower part inside the tank body 11 and has a structure for radiating the heat of the heat medium heated by the heat collector 31 to the water in the tank body 11.
The circulator 34 has a built-in pump, and supplies and circulates the heat medium from the heat collector 31 to the radiator 33 by reversing the convection direction by heat. The circulator 34 is outside the tank main body 11 and has an installation space SP. Is installed.

The solar power generation device 4 includes a solar power generation module 41 and a power conditioner 42.
The photovoltaic power generation module 41 generates power by sunlight, is held along a surface of the heat collector 31, is held in a planar shape, and outputs the generated direct current to the power conditioner 42. In the first embodiment, the solar power generation module 41 is translucent and capable of transmitting light, and sunlight passes through the solar power generation module 41 and is collected by the heat collector 31. It is possible to do.

  The power conditioner 42 converts the DC power generated by the photovoltaic power generation module 41 into AC power and supplies the AC power to the dwelling side, and is installed in the installation space SP. Further, the power line 43 connected to the power conditioner 42 is routed to the dwelling side through the waterproof structure portion 7 together with the both pipes 14 and 15.

  The pressurizer 5 is interposed in the middle of the hot water supply pipe 15, pressurizes the hot water heated in the hot water storage tank 1, and supplies it to the residence side, and is installed in the installation space SP. In addition, although the example which installed the pressurizer 5 in order to aim at the stable hot water supply is shown in this Embodiment 1, since the hot water storage tank 1 is arrange | positioned on the rooftop, the hot water supply using only gravity is also possible. Therefore, the pressurizer 5 may not be provided.

Next, the operation of the first embodiment will be described.
(During daytime sunshine)
When the sun is shining, the photovoltaic power generation module 41 receives sunlight to generate power, and the power can be supplied from the power conditioner 42 to the residence.
Moreover, the sunlight which permeate | transmitted the solar power generation module 41 is heat-collected by the heat collector 31, and the heat medium which passes the heat collector 31 is heated. At the same time, the circulator 34 is driven, the heat medium heated by the heat collector 31 is circulated to the radiator 33, and the water stored in the tank body 11 is heated.

  In the hot water storage tank 1, the hot water heated by the radiator 33 gathers in the upper part of the tank main body 11 by natural convection along the arrow in the figure, and the relatively low temperature hot water is in the tank main body along the arrow in the figure. After the convection to the lower part of 11, the heat is radiated by the radiator 33 and convection to the upper part. By repeating this convection, the hot water is stored in the upper part in the tank body 11. At this time, since the hot water storage tank 1 is inclined, natural convection is promoted and low-temperature water is collected at the lower part of the tank so that efficient heating by the radiator 33 is possible as compared with the case where the hot water storage tank 1 is installed approximately horizontally. To do.

In addition, when hot water is used on the residential side, hot water in the upper part of the tank main body 11 is supplied via the hot water supply pipe 15. And in this Embodiment 1, since the hot water storage tank 1 is inclined, compared with what was installed horizontally, the height of the up-down direction when high temperature hot water collected can be ensured, and the hot water supply is equivalent. It is possible to secure a change in the water level that can supply hot hot water from the mouth 15a, and stable hot water supply is possible.
When the amount of water in the tank body 11 is reduced by this hot water supply, water is replenished through the water supply pipe 14 as needed.

(At night or when there is insufficient sunlight)
When sunlight cannot be obtained, such as at night, the heat pump device 2 is driven, the air heat exchanger 21 absorbs heat from the air, and the heat thus obtained is sent to the water heat exchanger 22 to dissipate the heat so that the tank body 11 Heat the water inside. In this case, late-night power can be used at night, which is excellent in economic efficiency.

  In Embodiment 1, since heating using solar heat and heating using outside air temperature can be performed as described above, a water temperature sensor for detecting the water temperature in the tank body 11 and the heat medium of the solar heat collecting device 3 Based on the temperature detected by the heat medium temperature sensor that detects the temperature and the temperature detected by the heat temperature sensor that detects the heat generation temperature of the water heat exchanger 22 of the heat pump device 2, the heating is performed selectively throughout the day. Is possible. Further, power consumption can be suppressed by stopping the circulator 34 while the hot water temperature in the hot water storage tank 1 is higher than the temperature in the heat collector 31.

(Effect of Embodiment 1)
a) Since the hot water supply unit A is installed on the roof RF, a site for installing the hot water supply unit A is not necessary. In particular, as in the first embodiment, a plurality of hot water supply units A are installed in the housing complex. The site area required for installation can be greatly reduced.

  b) Since the hot water supply unit A installs the hot water storage tank 1 on the roof RF, hot water supply utilizing gravity is possible, and the pressure resistance performance of the hot water storage tank 1 and the hot water supply pipe 15 can be suppressed. Thereby, the weight saving and cost reduction of the hot water storage tank 1 and the hot water supply pipe 15 can be achieved. Further, even when the pressurizer 5 is provided as in the first embodiment, the output can be suppressed to suppress the pressure resistance, and the weight and cost can be reduced.

  c) Since the hot water storage tank 1 is formed flat and inclined, it is possible to suppress the height on the roof while ensuring the overall capacity compared to installing a conventional rectangular parallelepiped or cylindrical tank on the rooftop in a standing state. Compared with a hot water storage tank installed almost horizontally, it promotes natural convection and collects low-temperature water at the bottom of the tank, enabling efficient heating by the radiator 33. In addition, the water level of the high temperature hot water portion in the upper part of the tank is secured to enable stable hot water supply. In addition, the space formed between the hot water storage tank 1 and the roof RF is used as an installation space SP, and the heat pump device 2 as a heating means, the circulator 34, the power conditioner 42, Since the pressurizer 5 is arranged, the space can be effectively used, and an efficient and compact installation is possible.

  d) Since the heat pump device 2 is used as the heating device, the water in the hot water storage tank 1 can be heated by the thermal energy of the outside air, and inexpensive heating is possible. In addition, since it is installed on the roof RF, for example, the ambient temperature at night is often higher than when it is installed on the north side of the building, and the heat collection performance in the air heat exchanger 21 is high. .

  e) Since the solar heat collecting device 3 is provided in parallel with the heat pump device 2 as a heating device for heating the water in the hot water storage tank 1, inexpensive heating when sunshine is obtained is possible, and both are selectively used. Thus, efficient heating can be performed.

  f) Since the heat collector 31 of the solar heat collecting device 3 is installed on the hot water storage tank 1 having a flat shape, the heat collector 31 is installed in comparison with the heat collector 31 installed in parallel in the horizontal direction of the hot water storage tank 1. It can be installed in a compact manner by reducing the required rooftop area, and the heat collector 31 is less likely to enter the shadow of the hot water storage tank 1, has excellent heat collection efficiency, and can omit the members that support the heat collector 31. And advantageous in terms of economy. In addition, by covering the hot water storage tank 1 with the heat collector 31, the hot water storage tank 1 can be protected and the durability of the hot water storage tank 1 can be improved.

  g) Since the photovoltaic power generation module 41 of the photovoltaic power generation device 4 is installed on the flat hot water storage tank 1, the photovoltaic power generation module 41 is compared with that installed in parallel in the horizontal direction of the hot water storage tank 1. Thus, a compact installation is possible by reducing the area of the roof RF necessary for the installation. Further, in the first embodiment, the photovoltaic power generation module 41 is stacked on the heat collector 31, thereby enabling a more compact installation and allowing the photovoltaic power generation module 41 to transmit light. Even if the solar power generation module 41 is stacked on the heat collector 31, heat collection by the heat collector 31 is not hindered. In addition, since the heat collector 31 also serves as a member that supports the solar power generation module 41, the overall configuration can be reduced in weight.

  h) Since the pipes 14 and 15 and the power lines 43 and 70 pass through the roof RF are arranged below the hot water storage tank 1 so as to be covered with the hot water storage tank 1, rain and snow are not easily applied to the through parts. Therefore, the occurrence of water leakage into the building can be suppressed.

  i) Since the hot water supply unit A is installed independently in each unit in the unit building UH, which is an apartment house, it is possible to detect the electricity bill and the water bill separately for each house.

(Other embodiments)
Below, the hot water supply unit of other embodiment is demonstrated.
In describing other embodiments, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. Regarding the action, the action different from that of the first embodiment will be described, and the description of the same action as that of the first embodiment will be omitted.

(Embodiment 2)
As shown in FIG. 3, the hot water supply unit B of the second embodiment omits the solar power generation device 4 from the hot water supply unit A of the first embodiment and replaces the heat pump device 2 as a heating device with a power-driven heating device 200. This is an example of installing.

That is, the hot water supply unit B of Embodiment 2 is provided with the heating device 200 and the solar heat collecting device 3 as shown in FIG.
The heating device 200 is connected to the control unit 201 driven by the power supplied from the residence side, and is connected to the control unit 201 via the power line 203, and the driving is controlled by the control unit 201 and installed in the lower part of the hot water storage tank 1. And a heater 202 that heats the water in the hot water storage tank 1.
In the solar heat collector 3, the heat collector 31 is exposed upward in the second embodiment. Other configurations are the same as those in the first embodiment.

In Embodiment 2, since the heating device 200 driven by electric power is provided as the heating device, the water in the hot water storage tank 1 can be heated by the heater 202 even at night, when the sunlight is insufficient, or when the outside air is at a very low temperature. Similarly to the first embodiment, when there is sunshine, the water in the hot water storage tank 1 can be heated by the solar heat collecting device 3 at a low cost.
In the hot water supply unit B of the second embodiment, the effects a), b), c) and f) h) i) can be obtained as in the first embodiment.

  (Embodiment 3)

  The hot water supply unit C of the third embodiment is an example in which the solar heat collecting device 3 is omitted from the hot water supply unit B of the second embodiment, as shown in FIG.

Therefore, in the hot water supply unit C of the third embodiment, the water in the hot water storage tank 1 is heated by the power-driven heating device 200.
In the hot water supply unit C of the third embodiment, the effects a), b), c), h), i) can be obtained as in the first embodiment.

(Embodiment 4)
As shown in FIG. 5, hot water supply unit D of the fourth embodiment is an example in which heating type heat pump device 403 is used as a heating device instead of heating device 200 of hot water supply unit C of the third embodiment.

This heating heat pump apparatus 403 uses the heat collector 31 shown in the first embodiment as a heat exchanger. Then, the heat collector 31 and gas sealing structure, the low pressure low temperature gas as a heat medium (e.g., CO ₂₎ are adapted to heat the.

  The circulation pipe 432 that circulates the heat medium between the heat collector 31 and the radiator 33 is provided with a pressurizer 434 and an expansion valve 435. As shown in the figure, the circulation pipe 432 includes: A pipe 432a that connects the upper part of the heat collector 31 and the pressurizer 434, a pipe 432b that connects the pressurizer 434 and the lower part of the radiator 33, a pipe 432c that connects the upper part of the radiator 33 and the expansion valve 435, and expansion A pipe 432d that connects the valve 435 and the lower part of the heat collector 31 is provided to form a heat pump cycle.

  That is, in the heat pump cycle of the heating type heat pump device 403, the heat medium that has been converted into the low-pressure intermediate temperature gas by heating the low-temperature low-pressure gas in the heat collector 31 is pressurized by the pressurizer 434 to be the high-pressure high-temperature gas. Sent to. Then, the heat medium that radiates heat by the heat radiator 33 and heats the water in the hot water storage tank 1 and becomes a high-temperature intermediate-temperature gas is expanded by the expansion valve 435 and returned to the heat collector 31 as a low-pressure low-temperature gas.

  Therefore, although the heat pump device 2 shown in the first embodiment forcibly applies a relatively low outside air temperature with a fan and heats it, in the fourth embodiment, the heat collector 31 is outside during the daytime. The temperature is much higher than the temperature, and you can save expensive daytime electricity charges. In addition, at night, the heat collector 31 has an outside air temperature, but can be heated using midnight power as usual. Moreover, since the heat collector 31 has a large heat exchanger area, a fan is unnecessary.

As shown in the first embodiment, the solar power generation module 41 can be attached to the heat collector 31 and used as a power source for the heating heat pump device 403.
Also in the fourth embodiment, the effects a), b), c), d), f), h) and i) can be obtained.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment, A various deformation | transformation and substitution can be added in the range which does not deviate from the summary of this invention.

  For example, in the first to fourth embodiments, an example in which the present invention is applied to an apartment house is shown, but the present invention can also be applied to a detached house. Moreover, even when applied to an apartment house, the number and arrangement of units forming one house are arbitrary, and the number of floors of a building is not limited to the three-story structure shown in Embodiments 1 to 4, but the first floor It can be applied to buildings with 2 stories, 4 stories and more.

  Moreover, in Embodiment 1-4, although the flat roof was shown as a roof, it can install also in the building where the roof inclined.

  In addition, the circulator 34 shown in the first embodiment is electrically driven and driven by wiring from the dwelling. However, since it is installed on the roof RF, it is driven by a solar cell. A thing may be used. In this case, the heating by the solar heat collecting device 3 is performed while the sunlight is irradiated, and during this time, the circulator can also be driven by the solar cell to circulate the heat medium and perform an efficient operation. be able to.

1 Hot water storage tank 2 Heat pump device (heating device)
DESCRIPTION OF SYMBOLS 3 Solar heat collecting device 4 Solar power generation device 7 Waterproof structure part 11 Tank main body 11a Upper surface 11b Lower surface 11c Side surface 14 Water supply pipe 15 Hot water supply pipe 20 Main body unit 21 Air heat exchanger 22 Water heat exchanger 31 Heat collector 33 Radiator 41 Photovoltaic power generation module 200 Heating device 202 Heater 403 Pressurization type heat pump device (heating device)
A Hot water unit B Hot water unit C Hot water unit D Hot water unit RF Roof SP Installation space

Claims (7)

A hot water storage tank for storing hot water;
A heating device in which a heater for heating water in the hot water storage tank is installed at the bottom of the tank;
A hot water pipe connected to the hot water storage tank for supplying water into the hot water storage tank and a hot water supply pipe for supplying hot water in the hot water storage tank into the building;
A hot water supply unit comprising:
The hot water storage tank is formed in a shape having an upper and lower surface larger than the side surface, and the hot water storage tank is inclined on the roof of the building with one end of the upper surface disposed above the other end. The hot water supply unit is characterized by being installed with a space for installation of equipment including the heating device between the roof and the roof.   A heat collector that covers the upper surface of the hot water storage tank and collects solar heat, and a radiator that is provided at the lower part of the hot water storage tank and radiates heat by circulating a heat medium heated by the heat collector. The hot water supply unit according to claim 1, further comprising a solar heat collecting apparatus. A solar battery module of a solar power generation device is provided to cover the collector of the solar heat collector,
3. The hot water supply unit according to claim 2, wherein the solar cell module is formed so that sunlight can be transmitted to the heat collector, and is supported by the heat collector and is held in shape.   The said water supply pipe and the said hot water supply pipe are piped in the said building through the said roof in the position where the upper part is covered with the said hot water storage tank in the said roof. The hot water supply unit according to any one of the above.   As the heating device, a heat pump device having an air heat exchanger that heats the heat medium by exchanging heat with the outside air, and a water heat exchanger that sends the heat medium heated by the air heat exchanger and dissipates heat. The hot water supply unit according to any one of claims 1 to 4, wherein a water heat exchanger of the heat pump device is used as the heater. As the heating device, a collector that covers the upper surface of the hot water storage tank, collects solar heat, exchanges heat with the heat medium and heats the low-temperature and low-pressure gaseous heat medium, and is heated by the heat collector A pressurizer that pressurizes a gaseous heat medium to form a high-pressure high-temperature gaseous heat medium and a high-pressure high-temperature gaseous heat medium that is provided at the bottom of the hot water storage tank and is sent from the pressurizer. A pressure-type heat pump device having a radiator and an expansion valve that expands a gaseous heat medium radiated by the radiator to form a low-temperature low-pressure gas, and the radiator of the pressure-type heat pump device includes the radiator The hot water supply unit according to any one of claims 1 to 4, wherein the hot water supply unit is used as a heater.   The hot water supply unit according to any one of claims 1 to 5, wherein the roof is a flat roof.

Images