JP2003139413A - Solar water heating system, solar water heater, and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save energy for heating water in a water storage tank. SOLUTION: A solar water heating system, a solar water heater, and a method for manufacturing the same are provided, characterized in that the solar water heating system utilizing solar rays for heating water has a water storage tank 2, a heater 4 for heating the water in the tank 2, a solar water heater 1 for heating the water by utilizing solar rays, and a circulation unit 3 for circulating the water between the tank 2 and the heater 1, and that the water in the tank 2 is heated while circulating between the tank 2 and the heater 1 and, as required, with the heater 4 in combination.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a technique for obtaining hot water by utilizing sunlight.

[0002]

2. Description of the Related Art Conventionally, there is a device in which a heat collector having a hot water storage tank is installed on a roof or a roof to directly heat water, store the hot water in the hot water storage tank, and supply hot water to a bathtub as needed. With this method,
The total weight of the equipment is the sum of the weight of the equipment and the weight of hot and cold water.
May exceed kg. Therefore, when this device is installed on the roof or roof, a strong structure capable of holding these weights is required. Also, since warming from cold water such as tap water requires a lot of energy to raise the water to a temperature that can be used in the bath.

There is also a device in which a heat collector is installed on the roof or roof to heat the circulating heat medium and the antifreeze liquid and indirectly heat the water supply in the hot water storage tank installed on the lower floor. With this device,
A hot water storage tank (about 300 liters) is required to be installed, and moreover, a lot of energy is required to heat the water to a temperature that can be used in the bath in order to warm it from cold water such as tap water. Further, since heat exchange is performed, it is disadvantageous in terms of thermal efficiency and the price is high.

[0004] In a general household, it is put in a bathtub 20
The energy cost for obtaining 0 to 250 liters of hot water occupies a large proportion, and if 200 to 250 liters of tap water is newly used every time the bath is cooked, the water supply cost will also increase.

[0005]

<A> The present invention is to obtain an energy-saving solar hot water system. <B> Further, the present invention is to facilitate the control of heating the water in the aquarium. <C> Further, the present invention is to obtain a device that saves space and has a high degree of freedom in installation location. <D> The present invention also provides a solar water heater having a simple structure.

[0006]

SUMMARY OF THE INVENTION The present invention is a solar-powered hot water system for heating water by utilizing sunlight, a water tank for storing water, a heater for heating water in the water tank, and sunlight. It is equipped with a solar water heater that heats water by heating it and a circulation device that circulates the water between the water tank and the solar water heater, and circulates the water between the water tank and the solar water heater and heats it as necessary. A water tank that stores water in a solar-powered hot water system, or a solar-powered hot water system that heats water by using sunlight, characterized by being able to heat water in an aquarium in combination with a vessel , Equipped with a solar water heater that uses sunlight to heat water, a circulation device that circulates water between the water tank and the solar water heater, and a solar power generator that uses sunlight to generate electricity , Circulate water between the aquarium and solar water heater by driving the circulation device with a solar power generator And heating the water in the aquarium, the solar-powered hot water system, or, in the solar-powered hot water system, when the amount of sunlight or the amount of power generated by the solar power generator is more than a certain amount, circulation operation is performed. , When the amount of sunlight or the amount of power generation is less than a certain amount, the circulation of water is stopped, a solar-powered hot water system, or in the solar-powered hot water system, a thermometer for measuring the water temperature of an aquarium. If the water temperature of the water tank is below a predetermined temperature, the circulation of water is started, and if the temperature is above a predetermined temperature, the circulation of water is stopped. In the hot water system, the circulation device includes a water absorption pipe that transfers water from the water tank to the solar water heater, a transfer pipe that transfers water from the solar water heater to the water tank, and a pump that circulates water disposed in the middle of the water absorption pipe. , A filtering device arranged between the pump and the solar water heater in the middle of the water absorption pipe, and a drain pipe attached to the water absorption pipe between the pump and the filtering device, and filtering the water in the solar water heater It absorbs sunlight in a solar water heating system or a solar water heater that heats water using sunlight, which is characterized by backwashing by backflowing inside and discharging through a drainage pipe. And an endothermic plate that is converted into heat and is formed integrally with the endothermic plate and is arranged along the endothermic plate, and has a flow path for flowing water, an inlet for injecting water into the flow path, and discharging water from the flow path. A solar water heater or a solar water heater in which water is injected into the flow channel from the injection port, heated in the flow channel, and discharged from the discharge port. The channels are arranged parallel to each other along the heat absorbing plate, and both ends of the channel are shielded from the outside by a lid, A solar water heater characterized in that a plurality of flow paths are formed in a single flow path by alternately providing communication parts and non-communication parts at the ends of a plurality of partition plates that partition the plurality of flow paths. Or
In a method of manufacturing a solar water heater that heats water using sunlight, a plurality of flow channels are formed in parallel by extrusion and communicated with the ends of multiple partition plates that partition the flow channels. Parts and non-communicating parts are alternately provided to form a plurality of flow paths in one flow path, and both ends of the plurality of flow paths are shielded from the outside by a lid. In the manufacturing method.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

<B> Solar-powered hot water system The solar-powered hot water system heats the water in the aquarium 2 such as a bathtub using sunlight. As shown in FIG. 1, for example, the solar water heating system includes a water tank 2, a solar water heater 1 that heats water, and a circulation device 3 that circulates water between the water tank 2 and the solar water heater 1. I have it. Aquarium 2
The water may be water supplied as cold water from a water supply or the like through the water supply pipe 22, water supplied as hot water from a water heater, or hot water that has already been used like water in a bathtub. The water in the aquarium 2 is the solar water heater 1
Apart from this, it is also possible to heat with the heater 4. As described above, the solar-powered hot water system can be installed in a place where an electric water heater, a gas water heater, or the like is already installed without touching them.

<B> Circulating device The circulating device 3 circulates water between the water tank 2 and the solar water heater 1. For example, as shown in FIG. 1, the circulation device 3 includes a water absorption pipe 31 and a transfer pipe 32. The water in the water tank 2 is transferred to the solar water heater 1 through the water absorption pipe 31, and the transfer pipe 32 is used.
The water of the solar water heater 1 can be transferred to the aquarium 2 through. A pump 33 is arranged in the water absorption pipe 31, and the water in the water tank 2 is sucked by driving the pump 33 to circulate the water.
Further, a check valve 35 and a filtering device 5 are arranged in the water suction pipe 31 as needed. The check valve 35 can prevent the water of the solar water heater 1 and the filtering device 5 from flowing back into the aquarium 2. In addition, when used together with the solenoid valve 61, water accumulated in the circulation device 3 and the solar water heater 1 is drained to prevent freezing in winter. Air vent valve 36 on top of solar water heater 1
Install. With the air bleeding valve 36, the inside of the solar water heater can be emptied except when the water is heated by the solar water heater 1. The performance of the pump 33 varies depending on the installation environment of the solar hot water system, but for example, a pump having a capacity of about 0.5 liter / minute × 15 mH can be used.

<C> Pump Drive The pump 33 is driven and controlled by the electric power of the solar power generator 7,
It starts when sunlight starts to hit the solar power generator 7 and the solar water heater 1, and stops when the sun sets. More specifically, the drive control of the pump is performed by the pump drive control device 34. When the amount of light from the sunlight is large and the power generated by the solar power generator 7 is large, the output of the pump 33 is increased to circulate. When the amount of water to be used is increased (the circulation speed of water is increased), and conversely, when the amount of light from sunlight is small and the power generated by the solar power generator 7 is small, the output of the pump 33 is reduced and the water is circulated. Reduce the amount of water (decrease the water circulation speed).
This prevents the amount of heat applied to the unit amount of water by the solar water heater 1 from increasing or decreasing even if the amount of light from the sunlight changes, and the amount of heat is constantly and evenly distributed as much as possible. Control to give. The solar power generator 7 used here may be one that can generate power by sunlight, such as a solar cell.

Further, when the sunlight is weakened and the amount of sunlight per unit time or the amount of electricity generated by the solar power generator 7 becomes less than a certain amount, the pump drive control device 34 uses water as a solar water heater. Since heating cannot be performed and there is a risk of cooling, conversely, the drive of the pump 33 is stopped and the circulation of water is stopped.
When the amount of light or the amount of power generation per unit time exceeds a certain amount, driving of the pump 33 is started and circulation of water is started. As described above, the pump drive control device 34 can optimally control the drive of the pump 33 by controlling the drive of the pump 33 depending on the magnitude of the output of the solar power generator 7. Here, the “constant amount” of the light amount or the power generation amount does not have to match when the driving of the pump 33 is stopped and when the driving of the pump 33 is stopped. It is better to use less than "a certain amount". In this case, it is possible to prevent frequent stop and start switching of the drive of the pump 33 at this boundary.

Further, the pump drive control device 34 is provided in the water tank 2.
If the water temperature becomes high and you do not need to heat it further,
Stop water circulation. For that purpose, the water tank 2 is connected to the thermometer 21
When the temperature is higher than a predetermined temperature, the drive of the pump 33 is stopped and the water circulation is stopped. When the temperature is lower than the predetermined temperature, the pump is driven to start the water circulation. For example, a thermo device can be used to perform temperature control in this manner. Here, even in the case of the "predetermined temperature", it is not necessary to match the time when the driving of the pump 33 is stopped and the time when the driving of the pump 33 is started. It is better to be smaller than.

<D> Filtering Device When it is necessary to filter the water in the water tank, the filtering device 5 is arranged in the water circulation path such as the water absorption pipe 31 or the transfer pipe 32. As shown in FIG. 1, when the filtering device 5 is arranged in the middle of the water suction pipe 31, it is arranged in the middle of the check valve 35 and the solar water heater 1, and the solenoid valve 61 is arranged between the filtering device 5 and the check valve 35. It is preferable to connect the drainage pipe 6 via a valve such as. The filtration device 5 is
Easy-to-replace filter mechanism that captures pollutants, BO
An activated carbon filtration method for capturing D load components, a chitosan ceramic ball, or the like is used. If necessary, sterilization is performed before the filtration to suppress the generation of bacteria in the system and to maintain the quality of hot and cold water. The method of sterilization and suppression of various bacteria is performed by a method that does not affect the human body, and examples thereof include an ozone sterilization method, an ultraviolet sterilization method, and an electrolysis method. As the sterilization device, another device other than the filtration device 5 may be used.

When draining the water accumulated in the solar water heater 1 with the water circulation stopped, the solenoid valve 61 is opened. When the solenoid valve 61 is opened, the water accumulated in the solar water heater 1 flows backward through the filter device 5 and is discharged to the outside from the drain pipe 6 through the solenoid valve 61. At this time, the water is filtered by the filtration device 5.
Because of the reverse flow, the dirt accumulated in the filter device 5 is washed off by the water from the solar water heater 1 and discharged through the drain pipe 6. The solenoid valve 61 can be drive-controlled by the pump drive controller 34.

<E> Solar Water Heater The solar water heater 1 heats water, for example, as shown in FIG.
As shown in, a heat absorption plate 11, a water flow path 15, and a partition plate 12 for partitioning the flow paths are provided, and the heat absorption plate 11 absorbs sunlight,
This solar heat warms the water flowing in the flow path 15. The heat insulating material 17 is arranged so as not to radiate heat to a portion other than the heat absorbing plate 11 of the solar water heater 1, for example, a back surface, a top surface, a bottom surface, or both surfaces that require heat insulation.

The solar water heater 1 is manufactured from an extruded material such as aluminum which has good heat conductivity, is inexpensive, is easy to process and has strength. During extrusion molding, a plurality of flow paths 15 are formed in the extrusion molding material. Thereby, the heat absorbing plate 11 and the back plate 16 are formed on one surface, the plurality of flow paths 15 are formed in parallel between the heat absorbing plate 11 and the back plate 16, and the partition plate 12 that partitions the plurality of flow paths 15 is formed. It In order to make the plurality of flow paths 15 into one flow path, a communication part 13 and a non-communication part 14 are provided at the end of the partition plate 12, as shown in FIG. Communication part 13
Is, for example, a portion provided with a notch, and the non-communication portion 14
Is a place where no notch is provided. The communication portions 13 and the non-communication portions 14 are alternately provided at both ends of the partition plate 12, and the plurality of flow paths communicate with each other to form one flow path 15. Both sides of the communication part 13 and the non-communication part 14 are covered with a lid 18. Lid 1
8 is attached to the heat absorbing plate 11, the back plate 16, etc. by welding, and seals the flow path 15 so that water does not leak outside. It is preferable to dispose the heat insulating material 17 also on the surface of the lid 18 to suppress heat radiation from the side surface. The above is the description of the material by the extrusion molding method, but it may be a mold manufacturing product,
A plastic material can also serve the purpose.

Since the solar water heater 1 has a simple structure, it can be installed in any place where it is exposed to sunlight. The installation place may be, for example, a place where the sunlight hits, such as a roof or a side surface of a building, a side surface or a floor surface of a veranda of an apartment house, a side surface of a fence, or a fence itself. When a wall or the like needs visibility, a window penetrating the heat absorbing plate 11 and the back surface of the solar water heater 1 may be provided. In this way, it is possible to make an optimum shape according to the installation location.

The method of operating the solar-powered hot water system used in the bathtub will be described below.

<A> Start-up, when the sun begins to hit the warming solar water heater 1 and the solar power generator 7, the pump 33 starts operating by the power of the solar power generator 7. Hot water in the bathtub is sucked by the pump 33 through the water suction pipe 31, passed through the check valve 35 and the filtering device 5, transferred to the solar water heater 1, and accumulates from below the solar water heater 1. At that time, the air in the solar water heater 1 is discharged from the air vent valve 36. When the hot water passes through the solar water heater 1, it is warmed to become hot water, passes through the transfer pipe 32,
Returned to the bath. When the hot water in the bathtub is the remaining hot water in the bath, dirt is filtered by the filtering device 5. Also, it is sterilized if necessary. The remaining hot water of 200 to 250 liters in the bathtub, or the fresh water stored in the bathtub is slowly circulated and filtered during the daytime sun (about 8 hours),
Warm up to the water temperature suitable for bathing.

<B> Stopping the operation When the sun goes down, the electric power of the solar power generator 7 falls below a predetermined value, and the pump 33 stops. Further, when the water temperature of the water tank is measured by the thermometer 21 and becomes equal to or higher than a predetermined value, the pump drive control device 34 stops the driving of the pump 33.

<C> When the operation of the backwash pump 33 of the filtering device is stopped, the solenoid valve 61 is opened, the hot water of the solar water heater 1 flows down through the drain pipe 6, and the dirt accumulated in the filtering device 5 is removed. Flow off and backwash the filtration device 5. In winter, the water in the circulation device 3 such as the solar water heater 1 is discharged to prevent freezing in the solar water heating system.

[0022]

According to the present invention, the following effects can be obtained. <A> The present invention can obtain an energy-saving hot water system using sunlight. <B> In addition, the present invention can easily control the heating of water. <C> Further, according to the present invention, a space-saving hot water system using sunlight can be obtained. <D> Further, according to the present invention, a solar water heater having a simple structure can be obtained.

[Brief description of drawings]

[Figure 1] Illustration of a hot water system using sunlight

[Figure 2] Illustration of the solar water heater

[Explanation of symbols]

1 ... Solar water heater 11 ... Heat absorption plate 12 ... Partition plates 13 ... Communication section 14 ... Non-communication section 15 ... Channel 16 ... Back plate 17 ... Insulation material 18 ... Lid 2 ... water tank 21 ... Thermometer 22 ... Water absorption pipe 3 ... Circulator 31 ... Water absorption pipe 32..Transfer pipe 33 .. Pump 34 .. Pump drive control device 35 ... Check valve 36 ... Air bleeding valve 4 ... heater 5 ... Filtration device 6 ... Drainage pipe 61 ... Solenoid valve 7 ... Photovoltaic generator

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shuichi Ueno             1-16-14 Shibuya, Shibuya-ku, Tokyo Tokyu             Inside the corporation (72) Inventor Satoshi Nakamura             1-16-14 Shibuya, Shibuya-ku, Tokyo Tokyu             Inside the corporation (72) Inventor Yoshio Kogusu             1-16-14 Shibuya, Shibuya-ku, Tokyo Tokyu             Inside the corporation (72) Inventor Yasuji Ohira             1-16-14 Shibuya, Shibuya-ku, Tokyo             Business

Claims (8)

[Claims] 1. A solar-powered hot water system that uses sunlight to heat water, a water tank that stores water, a heater that heats water in the water tank, and solar light that heats water using sunlight. It is equipped with a water heater and a circulation device that circulates water between the water tank and the solar water heater, circulates the water between the water tank and the solar water heater, and, if necessary, combines it with the heater to A solar hot water system characterized by being able to heat water. 2. A solar water heating system for heating water using sunlight, a water tank for storing water, a solar water heater for heating water using sunlight, and an aquarium and solar water heater. It is equipped with a circulation device that circulates water between and, and a solar power generator that uses solar power to generate electricity. The solar generator drives the circulation device to transfer water between the water tank and the solar water heater. A hot water system using sunlight, which is circulated in and heated in an aquarium. 3. The solar-powered hot water system according to claim 2, wherein when the amount of sunlight or the amount of power generated by a solar power generator is above a certain amount, a circulation operation is performed, and when the amount of sunlight or the amount of power generation falls below a certain amount. , A solar hot water system characterized by stopping the circulation of water. 4. The solar-powered hot water system according to claim 1 or 2, further comprising a thermometer for measuring the water temperature of the water tank, and when the water temperature of the water tank is equal to or lower than a predetermined temperature, circulation of water is started to a predetermined temperature. A solar hot water system characterized by stopping the circulation of water when the temperature is higher than the temperature. 5. The solar-powered hot water system according to claim 1 or 2, wherein the circulation device transfers water from the water tank to the solar water heater and the water from the solar water heater to the water tank. Transfer tube,
A pump arranged in the middle of the water absorption pipe to circulate water, a filtration device arranged between the pump and the solar water heater in the middle of the water absorption pipe, and a drain pipe attached to the water absorption pipe between the pump and the filtration device. A hot water system using sunlight characterized in that the water in the solar water heater is backwashed by backflowing in the filter device and discharged through a drain pipe. 6. A solar water heater that heats water by utilizing sunlight, an endothermic plate that absorbs sunlight and converts it into heat, is integrally formed with the endothermic plate, and is arranged along the endothermic plate. It is equipped with a flow path for flowing water, an inlet for injecting water into the flow path, and an outlet for discharging water from the flow path. A solar water heater characterized by being discharged from 7. The solar water heater according to claim 6, wherein a plurality of flow passages are arranged in parallel along the heat absorbing plate, and both ends of the flow passages are shielded from outside by a lid. A solar water heater, characterized in that a plurality of flow paths are formed in a single flow path by alternately providing communicating portions and non-communicating portions at the ends of a plurality of partition plates for partitioning. 8. A method of manufacturing a solar water heater that uses sunlight to heat water, wherein a plurality of partition plates are formed by extrusion molding so that a plurality of flow paths are formed in parallel inside and partition the plurality of flow paths. A plurality of flow paths are formed in a single flow path by alternately providing a communication part and a non-communication part at the end of each of the plurality of flow paths, and both ends of the plurality of flow paths are shielded from the outside by a lid. , Manufacturing method of solar water heater.