TW201346196A - Solar water heating device - Google Patents

Abstract

A solar water heating device comprises a liquid storage unit, a heat collection unit, a condensing unit and a pressure valve. The liquid storage unit comprises a bottom wall, a surrounding wall with a water inlet and a water outlet, a top wall defining an opening, and an insulating layer arranged on the bottom wall, the surrounding wall and the top wall; the heat collection unit comprises a diaphanous hollow housing disposed in the liquid storage unit, and a heat collecting plate disposed on the inner side of the bottom wall; the housing seals the opening and is cooperated with the liquid storage unit to define a liquid accommodating space. The condensing unit comprises a carrying seat arranged in the heat collection unit, and a condensing board at the top end of the carrying seat. The condensing board is used for collecting the solar energy, and the heat collection unit is used for heat conduction, so that the space is saved, and the heating efficiency is improved.

Description

Solar water heater

The present invention relates to a hot water device, and more particularly to a solar water heating device.

Referring to FIG. 1, a conventional solar water heating device includes a base 11, a water storage unit 12, and a plurality of vacuum heat absorption tubes 13.

The water storage unit 12 includes a water storage tank 121 disposed at a top end of the base 11 and a water inlet pipe 122 and an outlet water pipe 123 respectively disposed in the water storage tank 121. The vacuum heat absorbing tubes 13 are respectively disposed on the susceptor 11 and communicate with the water storage tub 121.

In general use, the vacuum heat absorbing tubes 13 absorb solar energy in the sun to heat the internal cold water. When the cold water is gradually heated to hot water, the specific gravity is reduced, and a convection cycle naturally occurs, and the hot water rises to the top of the water storage tank 121. The outlet pipe 123 is outputted, and the cold water input from the inlet pipe 122 is lowered until the vacuum heat pipe 13 is heated.

In the conventional solar water heater, since the vacuum heat absorbing tubes 13 have a gap with each other, the actual heat absorbing area is smaller than the overall occupied area, resulting in a waste of space.

And the general vacuum heat absorption tube 13 is cylindrical, except that the top end of the cylinder can be directly absorbed by the light and absorbed more solar energy, and the other surface is easy to be irradiated because the angle between the sunlight and the sunlight is less than ninety degrees. The reflection of sunlight on the surface causes less solar energy to be absorbed, thus causing the heating efficiency of the conventional solar water heater to be low.

Accordingly, it is an object of the present invention to provide a solar water heating apparatus which is space-saving and highly efficient in heating.

Therefore, the solar water heating device of the present invention comprises a liquid storage unit, a heat collecting unit, a concentrating unit, and a pressure valve.

The liquid storage unit includes a bottom wall, a surrounding wall extending upward from the periphery of the bottom wall and having a water inlet and a water outlet, a top wall extending inwardly from the top end of the surrounding wall, and an inner periphery defining an opening. And an insulating layer disposed on the bottom wall, the surrounding wall and the top wall.

The heat collecting unit comprises a hollow casing disposed in the liquid storage unit and permeable to light, and a heat collecting plate disposed on an inner side surface of the bottom wall, the casing closing the opening and cooperating with the liquid storage unit Define a liquid space.

The concentrating unit includes a carrier disposed on the heat collecting unit, and a concentrating plate disposed at the top of the carrier for collecting solar energy.

The pressure valve is disposed in the liquid storage unit and communicates with the liquid storage space for adjusting the pressure balance of the liquid storage space.

The invention has the effect of focusing the sunlight by the concentrating plate, and concentrating the sunlight on the heat collecting plate and the liquid receiving space to heat the cold water in the liquid containing space. Moreover, since the concentrating plate is flat, the effective area of the concentrating light is large, thereby saving space and having high heating efficiency.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Referring to FIG. 2 and FIG. 3, a preferred embodiment of the solar water heating device of the present invention comprises a liquid storage unit 2, a heat collecting unit 3, a concentrating unit 4, a pressure valve 5, and two windshields 6.

The number of the windshields 6 may also be three, four or more, and the solar water heating device of the present invention may also include only one windshield 6.

The liquid storage unit 2 includes a bottom wall 21, a surrounding wall 22 extending upward from the periphery of the bottom wall 21 and having a water inlet 221 and a water outlet 222, an inward extension from the top end of the surrounding wall 22, and an inner circumference defining A top wall 23 of an opening 231, and an insulating layer 24 disposed on the bottom wall 21, the surrounding wall 22, and the top wall 23.

In the embodiment, the material of the heat insulating layer 24 is a styrofoam, but it can also be other materials with a heat preservation effect, or a double-layer vacuum structure to achieve the heat preservation effect.

In the embodiment, the bottom wall 21, the surrounding wall 22 and the top wall 23 are made of metal, but may be ceramic, glass or other materials having heat resistance.

The heat collecting unit 3 includes a hollow housing 32 disposed in the liquid storage unit 2 and permeable to light, and a heat collecting plate 33 disposed on the inner side surface of the bottom wall 21, the housing 32 closing the opening 231 and A liquid containing space 31 is defined in cooperation with the liquid storage unit 2.

In the embodiment, the material of the casing 32 is tempered glass, but it can also be a transparent plastic with high temperature resistance or other materials with light transmission and high temperature resistance.

In this embodiment, the material of the heat collecting plate 33 is metal, but For other materials that are easy to conduct heat.

The concentrating unit 4 includes a carrier 41 that is horizontally rotatably disposed on the heat collecting unit 3, a concentrating plate 42 that is rotatably disposed at the top end of the cradle 41, and a sensation disposed on the concentrating plate 42. Detector 43.

In the embodiment, the material of the concentrating plate 42 is made of a light transmissive plastic, but may be a light transmissive material such as glass.

The pressure valve 5 is disposed in the liquid storage unit 2 and communicates with the liquid containing space 31. The windshield 6 is disposed around the concentrating unit 4 in the liquid storage unit 2 for protecting the concentrating unit 4 and the heat collecting unit 3 from being damaged by wind.

In general use, after the sunlight is focused by the concentrating plate 42, it passes through the casing 32 and enters the liquid containing space 31. Since the inside of the casing 32 is vacuum, the sunlight is not absorbed and directly irradiates the sunlight. The cold water in the liquid space 31 can avoid the loss of sunlight and improve the utilization efficiency of the solar energy. When the concentrating plate 42 is formed, the focus point 9 of the concentrating plate 42 can also be adjusted on the heat collecting plate 33, so that the heat collecting plate 33 can quickly conduct heat, thereby speeding up the temperature of the cold water. By the insulating layer 24, the temperature of the liquid containing space 31 can be maintained, and the speed of thermal energy loss can be reduced.

When the sun changes position with time, the angle of the sunlight can be sensed by the sensor 43 and the horizontal rotation of the carrier 41 can be adjusted, and the concentrating plate 42 can be rotated up and down to make the concentrating plate 42 and the sunlight. The incident angle is always ninety degrees, so good solar absorption efficiency can be obtained.

It is worth mentioning that the solar water heating device of the present invention can also use a single-axis tracking architecture or a dual-axis tracking architecture to adjust the angle of the concentrating panel 42. Get good absorption of solar energy efficiency.

When the internal pressure of the liquid storage unit 2 is too high, the pressure valve 5 opens and releases a part of the pressure to prevent the liquid storage unit 2 from being subjected to excessive pressure and bursting, causing safety problems.

Through the above description, the advantages of the solar water heater of the present invention can be summarized as follows:

1. The concentrating plate 42 is flat, and can fully utilize the light receiving area to achieve effective space utilization, and the material of the concentrating plate 42 is made of condensable plastic, which is light in weight, low in cost, and easy to maintain. .

2. Since the inside of the casing 32 is a vacuum, the loss of sunlight can be avoided, and by adjusting the focus point 9 of the concentrating plate 42 on the heat collecting plate 33, the heat can be quickly heated to accelerate the temperature rise of the cold water. By sensing the angle of the sunlight and adjusting the concentrating plate 42 correspondingly, the incident angle of the sunlight can be made constant at ninety degrees, thereby increasing the efficiency of absorbing solar energy and improving the heating efficiency.

In summary, the present invention can not only save space, but also increase the efficiency of absorbing solar energy to improve heating efficiency. Therefore, the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

2‧‧‧Liquid unit

21‧‧‧ bottom wall

22‧‧‧ Around the wall

221‧‧‧ water inlet

222‧‧‧Water outlet

23‧‧‧ top wall

231‧‧‧ openings

24‧‧‧Insulation

3‧‧‧Heating unit

31‧‧‧Liquid space

32‧‧‧ housing

33‧‧‧heat collecting plate

4‧‧‧ concentrating unit

41‧‧‧ bearing seat

42‧‧‧ concentrator

43‧‧‧Sensor

5‧‧‧pressure valve

6‧‧‧wind shield

9‧‧‧ Focus point

Figure 1 is a perspective view of a conventional solar water heater; 2 is a schematic cross-sectional view showing a preferred embodiment of the solar water heating apparatus of the present invention; and FIG. 3 is a schematic cross-sectional view of the preferred embodiment.

2‧‧‧Liquid unit

21‧‧‧ bottom wall

22‧‧‧ Around the wall

221‧‧‧ water inlet

222‧‧‧Water outlet

23‧‧‧ top wall

231‧‧‧ openings

24‧‧‧Insulation

3‧‧‧Heating unit

31‧‧‧Liquid space

32‧‧‧ housing

33‧‧‧heat collecting plate

4‧‧‧ concentrating unit

41‧‧‧ bearing seat

42‧‧‧ concentrator

43‧‧‧Sensor

5‧‧‧pressure valve

6‧‧‧wind shield

9‧‧‧ Focus point

Claims (5)

A solar water heating device comprising: a liquid storage unit comprising a bottom wall, a surrounding wall extending upward from a periphery of the bottom wall and having a water inlet and a water outlet, and an inwardly extending inner end of the surrounding wall a peripheral wall defining an opening, and an insulating layer disposed on the bottom wall, the surrounding wall and the top wall; a heat collecting unit comprising a hollow housing disposed in the liquid storage unit and permeable to light The housing encloses the opening and cooperates with the liquid storage unit to define a liquid storage space. A concentrating unit includes a carrier disposed on the heat collecting unit, and is disposed at the top of the carrier and configured to a concentrating plate for collecting solar energy; and a pressure valve disposed in the liquid storage unit and connected to the liquid accommodating space for adjusting the pressure balance of the liquid accommodating space. The solar water heating device of claim 1, wherein the heat collecting unit further comprises a heat collecting plate disposed on an inner side surface of the bottom wall. The solar water heater of claim 1, wherein the concentrating plate is rotatably disposed at a top end of the carrier, and the carrier is horizontally rotatably disposed at the heat collecting unit. The solar water heating device of claim 3, wherein the concentrating unit further comprises a sensor disposed on the concentrating plate for sensing a solar angle. The solar water heating device according to claim 1, further comprising at least one wind shield disposed around the liquid storage unit.