JPH03194360A - Hot water supply device utilizing solar heat - Google Patents

Abstract

PURPOSE:To simplify the installation work of a hot water supply device by a method wherein a hot water supply tank is installed on the top of an auxiliary heat source device, solar panels are mounted in an integral form on the front side of a housing and radiators are provided in the hot water supply tank. CONSTITUTION:A hot water supply tank 7 is installed on the top of an auxiliary heat source device 6. Solar panels 2 are mounted in an integral form on the front side of a housing 1 having the aforesaid tank and device placed therein. A first radiator 11 for sending out the heat collected by the solar panels 2 is provided in the lowest interior section of the hot water supply tank 7. A second radiator 14 for sending out the heat conducted from the auxiliary heat source device 6 is provided in the middle section thereof. The highest section thereof is used as a hot water storing part. In this manner the installation work of the hot water supply device can be simplified and the improvement of the thermal efficiency can also be achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water heater that has both a solar panel utilizing solar heat as a heat source and an auxiliary heat source such as a heat pump.

[Conventional technology]

A water heater that obtains hot water using solar heat is used as a home hot water system. In this type of water heater, the use of solar heat is unstable depending on the weather that day. For this reason, types of water heaters that are equipped with a petroleum heater, a heat pump, or the like as an auxiliary heat source in addition to a solar panel are known. A conventional water heater of this type is shown in FIG.

In the figure, reference numeral 21 indicates a solar panel installed, for example, on the roof of a house. This solar panel 21 is connected to a hot water tank 22 via a pump device P by a pipe 23, and a water supply pipe 2 connected to the lower part of the hot water tank 22
Water supplied from 4 is heated through a solar panel 21, returns to a hot water supply tank 22, and then sent out as hot water from a hot water supply pipe 25 connected to the upper part of the hot water supply tank 22. In this case, the hot water tank 22 includes:
A petroleum heater 26 as an auxiliary heat source is provided above the interior, near the hot water pipe 25.

[Problem to be solved by the invention]

However, in such a water heater, the solar panel 21 and the hot water tank 22 are installed in separate locations, and the system is not integrated as a whole. There are drawbacks that impair the It has also been pointed out that the installation work is large-scale and costs increase. Furthermore, from the standpoint of thermal efficiency, the solar panel 21, hot water tank 2
There was a problem in that heat loss occurred while the hot water flowed between the two.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems of the conventional technology, to simplify the installation of a water heater without damaging the appearance of the house, and to appropriately arrange a solar panel, a hot water tank, and an auxiliary heat source. Accordingly, it is an object of the present invention to provide a solar heat-utilizing water heater with improved thermal efficiency.

[Means to solve the problem]

In order to achieve the above object, the present invention installs a hot water tank on top of the auxiliary heat source device, integrally attaches a solar panel to the front of the main body housing in which these are stored, and installs a solar panel at the lowest level inside the hot water tank. A first radiator for discharging the heat collected by the solar panel is disposed in the section, and a second radiator for discharging the heat guided from the auxiliary heat source device is disposed in the section above the first radiator, The feature is that the top section is used as a hot water storage area.

[For production]

According to the present invention, since the structure is integrally assembled and attached, the structure as a whole has a cohesive appearance and is compact. In addition, the water at the lowest level of the hot water tank is primarily heated by the first radiator, which exchanges heat energy collected by the solar panel, and the second radiator, which is an auxiliary heat source, is heated above it.
Since it is heated secondarily by the radiator, efficient heating is achieved that corresponds to the convection of hot water.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a solar hot water supply system according to the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 indicates the main body housing of the solar hot water supply system according to this embodiment. is attached to. The outer surface of the solar panel 2 is covered with a glass panel 4, and the main body portion on the back side is a heat collecting plate 3 made of an aluminum alloy having good thermal conductivity. In the hollow space between the heat collecting plate 3 and the glass panel 4, a heat exchange vibe 5 is arranged in a meandering manner from approximately the center to the lower part. A gas refrigerant such as Freon, for example, flows through the inside of the heat exchange vibe 5. Note that a heat insulating material (not shown) is interposed between the front surface of the main body housing 1 and the back surface of the heat collecting plate 3.

A heat pump device 6 is housed and installed as an auxiliary heat source inside and below the main body housing. The heat pump device 6 is equipped with a compressor for compressing a gas refrigerant such as Freon and a heat exchanger for absorbing heat from outside air.

A hot water tank 7 is installed on the upper surface of the heat pump device 6, and the space defined inside the hot water tank 7 is divided into a lower section 8, a middle section 9, and an upper section ii from lower to upper, respectively.
! When divided into 110, the lowermost section 8 is provided with a solar coil 11 as a first radiator that guides the gas refrigerant from the solar panel 2 and releases the thermal energy of the collected sunlight. This solar coil 11 is connected to a heat exchanger vibe 5 inside the solar panel 2 and a connecting pipe 12, ]3
A circular circuit is formed by connecting the The connecting pipe 12 is connected to the inlet end 11 of the solar coil 11.
b and the top end of the heat exchange vibe 5, and the connecting pipe 13 connects the outlet end 11b of the solar coil 11 and the heat exchange vibe 5 at the bottom end. In addition, a second section for introducing gas refrigerant from the heat pump device 6 is provided in the middle section 9.
[heat pump coil as a radiator] 4 is arranged,
This heat pump coil 14 is connected to the heat pump device 6 by a connecting pipe 1.5.1.6. A water supply pipe] 7 is connected to the lower part of such a hot water tank 7, and a hot water supply pipe 1 led into the house is connected to the upper part of the tank 7.
8 are connected.

The solar hot water supply apparatus according to this embodiment is constructed as described above, and its functions and effects will be explained next.

As shown in FIG. 1, the solar water heater is installed on the wall 19 of a house facing south. The solar hot water supply system includes solar panels 2 and heat pump equipment 6.
, and the hot water supply tank 7 are integrally attached, so that it is only necessary to connect the water supply pipe 17 and the hot water supply pipe 18, which simplifies the installation work. Moreover, since the overall appearance can be made compact and cohesive, the appearance of the house is not impaired. If you use exterior materials that match the design and color tone of the solar panel 2 and the wall] 9, it will further harmonize with the exterior of the house.

Assume that water is introduced into the hot water tank 7 from the water supply pipe F, and that the hot water tank 7 is full of water.

The solar panel 2 receives the sunlight indicated by the arrow in the figure on its front surface, and the heat collecting plate 3 absorbs the thermal energy of the sunlight over its entire surface. Among them, the heat absorbed by the upper half surface of the heat collecting plate 3 where the heat exchange vibrator 5 is disposed is conducted through the heat collecting plate 3 made of aluminum alloy and heats the heat exchange vibrator 5. Contribute to.

In this way, the refrigerant in the heat exchange vibrator 5 is vaporized, and the gaseous refrigerant is introduced into the solar coil 11 through the connecting pipe 12, and while flowing through the solar coil 11, the lower compartment 8 of the water stored in the hot water tank 7 Exchanges heat with nearby water. In other words, when the refrigerant liquefies, it releases the thermal energy it possesses in the form of heat of condensation, and this heat of condensation raises the temperature of the water.The heated water moves to the middle compartment 8 and upper compartment 9 by convection. do. On the other hand, the refrigerant is returned to the heat exchanger vibe 5 through the connecting pipe]3.

In the process of heat exchange described above, the refrigerant that has become lighter by absorbing thermal energy is introduced from the uppermost end of the heat exchanger vibe 5 to the inlet end 11a of the solar coil and liquefied.
From the outlet end 11b located below, it passes through the connecting pipe 3 and returns to the lowest end of the heat exchange vibe 5. Therefore, the refrigerant circulates naturally without the need to particularly provide a pump or the like in the circulation circuit.

When the heat pump device 6 is driven, the water in the hot water tank 7 is further heated in the following manner. That is, in the evaporator included in the heat pump device 6, the refrigerant that is vaporized by taking in thermal energy from the outside air is compressed by the compressor and raised in temperature, and then introduced into the heat pump coil 14 through the connecting pipe 15. During the process of flowing through the heat pump coil 14, the refrigerant releases its thermal energy as condensation heat when it liquefies 1, thereby further increasing the temperature of the water near the middle section 9. The liquefied refrigerant flows back to the heat pump device 6 via the connecting pipe 16. The temperature of the hot water can be raised from 50°C to about 60°C by raising the temperature by this heat pump device 6.

The heat pump coil 14 is arranged above the solar coil 11 so that the hot water can be heated primarily by the solar coil 11 and then heated secondarily by the heat pump coil 14 by utilizing the convection of the hot water. Because of this, there is no waste in the use of thermal energy, and its efficiency can be improved.

In this way, hot water accumulates in the upper section 10 inside the hot water supply tank 7, and this hot water is supplied into the house via the hot water supply piping 18 for bathing and kitchen use as appropriate.

Next, another embodiment of the solar hot water supply system according to the present invention will be described with the same reference numerals assigned to the same components as in the first embodiment. In FIG. 2, in the solar hot water supply system according to the second embodiment, a heater 19 is disposed in an upper section 10 inside the hot water tank 7. As shown in FIG. If the heater 19 is further provided at the top as an auxiliary heat source in this way, it can function as a backup when the heat pump device 6 breaks down or when the heat pump device 6 is insufficient in capacity.

In addition, in the embodiment described above, the solar panel 2
Although the heat exchange pipe 5 is arranged in the hollow part to exchange heat with sunlight through the d medium, instead of this,
71 is filled inside the solar panel 2, the heat energy of the collected sunlight raises the temperature of this water, and the solar coil 1
It is also possible to have a configuration in which water is circulated through a closed circuit formed by 1 and 1. In this case as well, the positions of the quick-connect pipes 12 and 13 are the same as in the above embodiment, and water can of course be circulated naturally.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a hot water tank is installed on top of the auxiliary heat source device, a solar panel is integrally attached to the front of the main body housing in which these are housed, and the inside of the hot water tank is A first radiator for discharging the heat collected by the solar panel is arranged in the lowest section of the system, and a second radiator for discharging the heat led from the auxiliary heat source device is disposed in the upper section. Since the uppermost compartment is used as the hot water storage section, the installation work of the water heater can be simplified, and the entire system can be compactly packed, which has the advantage of not spoiling the appearance of the house. Furthermore, since the hot water is heated without waste using natural convection and sequentially using solar panels and an auxiliary heat source, it is possible to improve thermal efficiency.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing one embodiment of a solar water heating system according to the present invention, FIG. 2 is a vertical cross-sectional view of a solar water heating system according to another embodiment, and FIG. 3 is a conventional solar water heating system. FIG. 2 is a diagram showing the arrangement of each component device. 1... Main body housing, 2... Solar panel, 3...
...Heat collection, 4...Glass panel, 5...Heat exchange vibrator, 6...Heat pump device, 7...Hot water tank, 11...Solar coil, 14...Heat pump coil, 17...・Water supply piping, 18... Hot water supply piping.

Claims (1)

[Claims] In a solar hot water supply system that includes a solar panel, an auxiliary heat source device, and a hot water tank that stores heated hot water, the hot water tank is installed on top of the auxiliary heat source device, and these are stored. A solar panel is integrally attached to the front of the main body housing, and a first radiator that releases heat collected by the solar panel is installed in the lowest compartment inside the hot water tank, and the above-mentioned solar panel is installed in the upper compartment. A hot water supply system using solar heat, characterized in that a second radiator is disposed to radiate heat guided from an auxiliary heat source device, and the uppermost compartment is used as a hot water storage section.