CN102226582B - Indoor solar cooker for conducting solar energy by utilizing optical fiber - Google Patents

Abstract

The invention discloses an indoor solar cooker which utilizes an optical fiber to conduct solar energy, comprising a light concentrating unit arranged outdoors and a cooker arranged indoors, a light transmission unit is arranged between the light concentrating unit and the cooker; the light concentrating unit includes a light collecting cover And be used to realize the automatic tracking device that condenser is rotated in horizontal and vertical two directions; Optical transmission unit comprises optical fiber and optical converter, and optical fiber is the quartz optical fiber of 10cm, and optical converter is positioned at the focusing center position of condenser, The cooker includes an optical fiber socket arranged on the cooker shell, a focusing optical path formed by sequentially connected first lens, reflector, second lens and reflector, and the focus light path focuses the light beam to the bottom of the cooker; the cooker also includes a useful An adjustment structure for adjusting the distance between the second lens and the bottom of the cooker; the optical fiber is connected between the optical converter and the optical fiber socket. The invention can effectively improve the utilization rate of solar energy, has remarkable economic and social benefits, and is suitable for popularization and use in residential houses.

Description

Indoor solar cooker using optical fiber to conduct solar energy

technical field

The invention relates to a solar energy utilization system, in particular to an indoor solar cooker which utilizes optical fibers to conduct solar energy.

Background technique

Energy is an important material for the survival and development of human society, but human beings are currently facing a severe energy situation. Since the energy crisis was raised, people have gradually realized that the reserves of traditional energy sources such as oil and coal are not unlimited, there are not many reserves that are easy to exploit and utilize, and the development of the remaining reserves is becoming more and more difficult. It loses its mining value. Therefore, we must find a new energy structure, explore, research, develop and utilize new energy resources as early as possible, otherwise the survival of human beings will be threatened. At present, my country has also proposed corresponding energy strategies, and the energy strategies aimed at energy conservation and emission reduction are gradually playing an important role in people's daily life. Through analysis, the research team found that the sun provides human beings with an inexhaustible source of energy with its incomparably huge energy radiation. Planned and reasonable utilization of solar energy is inevitable for human society to move towards sustainable development. Choice is also an important way to build a harmonious society, promote a virtuous cycle of the ecosystem, and realize energy conservation and emission reduction. The present invention mainly develops the utilization of solar energy in a planned and reasonable manner, and improves the utilization rate of solar energy through the present invention, so that the solar energy gradually replaces the conventional energy in people's daily life. In this way, the goal of energy saving and emission reduction can be achieved.

However, the current solar energy utilization technology basically uses solar energy to heat the working medium outdoors, and uses pipes to introduce the working medium indoors, and the orientation of the receiving end cannot be adjusted. In this way, there will inevitably be losses and the maximum utilization efficiency cannot be achieved.

Contents of the invention

Aiming at the above-mentioned prior art, the present invention provides an indoor solar cooker that utilizes optical fibers to conduct solar energy. The present invention can expand the function and efficiency of household solar energy systems. The basic idea is to introduce the light energy after natural light focusing into the indoor cooker for use, and use the optical principle to make the low-grade sunlight focus on high-energy beams reaching 800 to 1000 degrees Celsius. Then use high-temperature-resistant optical fiber to direct the high-energy beam to the indoor cooker for direct use.

In order to solve the above-mentioned technical problems, the technical solution of an indoor solar cooker utilizing optical fiber to conduct solar energy in the present invention is to include a concentrating unit arranged outdoors and a cooker arranged indoors, the distance between the concentrating unit and the cooker is A light transmission unit is arranged between them; the light collection unit includes a light collection cover and an automatic tracking device for realizing the rotation of the light collection cover in both horizontal and vertical directions; the light transmission unit includes an optical fiber and a light converter, so The optical fiber is a 10cm quartz optical fiber, the optical converter is located at the focus center of the condenser cover, the cooker includes a cooker shell, an optical fiber socket arranged on the cooker shell, and a first lens connected in sequence , a focusing optical path formed by the reflector, the second lens and the reflector, the focusing optical path focuses the light beam to the bottom of the cooker; the cooker also includes an adjustment structure for adjusting the distance between the second lens and the cooker bottom, The adjustment structure is composed of an adjustment knob, a second lens fixing plate and a lifting transmission mechanism; the optical fiber is connected between the optical converter and the optical fiber socket.

The present invention uses optical fiber to transmit solar energy to an indoor solar cooker, wherein: the automatic tracking device includes a single-chip microcomputer, four photoresistors evenly distributed on the light collecting cover, a vertical rotation transmission mechanism and a horizontal rotation transmission mechanism. The four photoresistors are symmetrically arranged on the upper, lower, left, and right sides of the condenser with the center of the condenser, and are used to collect light intensity differences in the upper, lower and left and right directions of the condenser; Both the direct rotation transmission mechanism and the horizontal rotation transmission mechanism are provided with stepping motors respectively, and the single-chip microcomputer sends instructions to the stepping motors according to the data transmitted by the photosensitive resistor. The surface area of the condensing cover is 2 to 4 square meters. The lifting transmission mechanism includes a transmission gear, a transmission shaft and a cam, and the rotation of the cam drives the second lens fixing plate to move up and down.

Compared with the prior art, the present invention utilizes the beneficial effect of the indoor solar cooker of optical fiber conduction solar energy to be:

The invention expands the function and efficiency of the solar energy system in the prior art, introduces the focused light energy of natural light into the indoor cooker for use, uses the optical principle to make the low-grade sunlight pass through the focused high-energy beam reaching 800 to 1000 degrees Celsius, and then The high-energy beam is guided to the indoor cooker by using the high-temperature-resistant optical fiber for direct use. The invention uses optical fiber to conduct high-energy light beams, so by changing the length of the optical fiber, it can meet the needs of residents on floors of different heights in high-rise buildings, is easy to popularize and has wide application prospects.

The present invention can improve the use efficiency of solar energy and has the advantages of environmental protection and energy saving. According to the annual cost of using the traditional natural gas cooker for three people at home, it is 2.4 yuan*25m ³ *12=720 yuan. Taking Tianjin as an example, it can be used throughout the year. Utilize the solar radiation days to be 199 days, take 200 days to calculate, use the solar cooker of the present invention to be expected to save the expense of the whole year and be 2.4 yuan*25m ³ /30*200 days=400 yuan, therefore, the solar cooker of the present invention not only saves a large amount of for the society Energy can also reduce expenses for families. If it is promoted on a large scale, it will produce huge economic benefits and social benefits of environmental protection.

Description of drawings

Fig. 1-1 is the schematic diagram of the structure of the outdoor part in the indoor solar cooker utilizing optical fiber to conduct solar energy in the present invention;

Figure 1-2 is a schematic structural diagram of the automatic tracking device shown in Figure 1-1;

Fig. 2 is a structural schematic diagram of a solar cooker in the present invention;

Fig. 3 is a schematic cross-sectional view of solar cooker A-A shown in Fig. 2;

Fig. 4 is a top view of the solar cooker shown in Fig. 2 .

In the picture:

1——light socket 2——first lens 3——mirror

4——Second lens fixing plate 5——Second lens 6——Reflector

7——Pot bottom 8——Stove shell 9——Cam

10——Transmission shaft 11——Transmission gear 12——Adjusting knob

42——Optical converter 43——Bracket 44——Condenser cover

45——Automatic tracking device 451——Horizontal axis 452——The first stepping motor

453——Second driven gear 454——Second stepping motor 455——Second driving gear

456——the first driven gear 457——the first driving gear 458——vertical shaft

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

The present invention is an indoor solar cooker using optical fiber to conduct solar energy, which comprises a light concentrating unit arranged outdoors and a cooker arranged indoors, and a light transmission unit is arranged between the light concentrating unit and the cooker.

As shown in Fig. 1-1 and Fig. 1-2, described condensing unit comprises condensing cover 44 and is used to realize the automatic tracking device 45 that condensing cover 44 rotates on horizontal and vertical two directions; The accuracy of the tracking device can be controlled by a single chip microcomputer to achieve the purpose of sun tracking. The automatic tracking device in the present invention mainly controls the rotational movement of the condenser cover 44 on the horizontal plane and the vertical plane. Described automatic tracking device 45 comprises a single-chip microcomputer, four photoresistors, vertical rotation transmission mechanism and horizontal rotation transmission mechanism that are evenly distributed on the condenser cover 44, and described four photoresistors are symmetrically arranged on the center of the condenser cover 44. The upper, lower, left and right sides of the condensing cover 44 are used to collect light intensity differences in the up and down and left and right directions of the condensing cover 44, and the vertical rotation transmission mechanism and the horizontal rotation transmission mechanism are respectively provided with a A stepping motor, the single-chip microcomputer sends instructions to the stepping motor according to the data transmitted by the photoresistor. The photoresistors at the left and right ends collect the light intensity difference at the left and right ends of the condenser 44, and control the horizontal rotation of the condenser 44 by a single-chip microcomputer and a stepping motor; Strong difference, and through single-chip microcomputer and another stepper motor to control the up and down rotation of condenser cover 44, by arranging four photoresistors in this way, condenser cover 44 can be directly facing the sun, so that the collection of light can reach the best effect. When the automatic tracking device 45 works, the transmission line of the vertical rotation transmission mechanism is: the first stepper motor 452——the first driving gear 457——the first driven gear 456——the horizontal shaft 451 drives the condenser cover 44 in the Rotate in the vertical plane. Similarly, the transmission route of the horizontal rotation transmission mechanism is: the second stepper motor 454—the second driving gear 455—the second driven gear 453—the vertical shaft 458—the support 43— Drive the condenser cover 44 to rotate in the horizontal plane. In addition, it is also possible to set an initial position for the condenser 44, and when the sun sets, the condenser 44 returns to the original position, so that the condenser 44 can reach the best position of the sun incidence every morning.

The cooker 36 includes a cooker housing 8, an optical fiber socket 1 disposed on the cooker housing 8, a focusing optical path formed by sequentially connected first lens 2, reflector 3, second lens 5 and reflector 6, The focusing optical path focuses the light beam to the bottom of the cooker; the cooker also includes an adjustment structure for adjusting the distance between the second lens 5 and the bottom of the cooker, and the adjustment structure is composed of an adjustment knob 12, a second lens fixing plate 4 It is composed of a lifting transmission mechanism; the lifting transmission mechanism includes a transmission gear 11, a transmission shaft 10 and a cam 9, and the rotation of the cam 9 drives the second lens fixing plate 4 to move up and down.

The optical transmission unit includes an optical fiber 41 and an optical converter 42, and the optical fiber 41 is connected between the optical converter 42 and the optical fiber socket. In daily life, since the conduction loss of light in the optical fiber is much lower than that of electricity, the optical fiber can send sunlight to every corner. Considering that the focused sunlight has a large spot, an optical converter is required. 42. The light converter 42 is arranged at the focus center position of the condenser cover 44. The condenser cover 44 in the present invention can focus a larger area of sunlight onto the light converter 42 connected to the optical fiber. Make light intensity to a higher level to meet the energy requirements of indoor cooking. Therefore, the reflective mirror surface of the concentrating cover is preferably a silver-plated or aluminum-plated glass mirror, and aluminum polished mirror surface and polyester film aluminum-plated mirror surface can also be used. Usually, a concentrating solar cooker with a power of 700-1200 watts, its concentrator The lighting area of the light cover is about 1.5 to 2.0 square meters, therefore, the surface area of the light collecting cover is 2 to 4 square meters. The light converter 42 can convert the focused sunlight into parallel light with a higher degree of focus, so that when the high-energy light beam is transmitted into the optical fiber, the Kneadfield effect can be reduced, the loss of the high-energy light beam can be minimized, and the The heating effect of the high energy light on the fiber socket end at the other end of the fiber is minimized. Since ordinary plastic optical fibers cannot meet the requirements for conducting high-energy light beams, the optical fiber 41 in the present invention is a 10 cm quartz optical fiber. The invention transmits the high-energy light beam through the optical fiber to realize the transmission of the outdoor focused solar spot to the indoor, and then guides the high-energy light beam into the solar cooker. Through a focusing optical path arranged at the bottom of the cooker, the light can finally be refocused on the surface of the cooker. On the bottom of the cooker, it is possible to use the solar cooker indoors.

The operating principle of the solar cooker of the present invention includes an energy transfer part and a control part, wherein:

Energy transmission part: as shown in Figure 3, the high-energy sunlight gathered outdoors is transmitted to the room through an optical fiber and connected to the optical fiber socket 1 of the stove. The high-energy light beam is irradiated on the first lens 2 inside the cooker. The first lens 2 converts the high-energy light beam transmitted by the optical fiber into parallel light and then irradiates it on a reflector 3. The reflector 3 then irradiates the parallel light on a second Refocusing is carried out on the lens 4, and the focused light spot is irradiated on the cooker, and the cooking operation is performed by using the light energy. In addition, there is a circle reflector 6 around the second lens 5, and its effect is to reflect the light reflected from the bottom of the cooker (during the use of light energy) to the bottom of the cooker to improve the energy efficiency of the solar cooker.

Control part: as shown in Figure 4, through the rotation of the adjusting knob 12, the two gears 11 are sequentially driven, and then the rotation of the cam 9 is controlled through the transmission shaft 10, and the cam 9 will drive the second lens fixing plate 4 during the rotation process And the second lens 5 on it moves up (or down), so that the size of the light spot projected by the second lens 5 on the bottom of the cooker can be realized. When the second lens 5 moves downward, the spot becomes smaller, and the temperature at the bottom of the cooker The rise is accelerated, and when the second lens 5 moves upward, the light spot becomes larger and the temperature rise at the bottom of the cooker slows down. This can meet the demand for power changes during cooking operations.

Although the present invention has been described above in conjunction with the drawings, the present invention is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative, rather than restrictive. Under the inspiration, many modifications can be made without departing from the gist of the present invention, and these all belong to the protection of the present invention.

Claims (4)

1. An indoor solar cooker that utilizes optical fiber to conduct solar energy, including a light-gathering unit installed outdoors, the light-gathering unit includes a light-gathering cover (44) and is used to realize the light-gathering cover (44) in both horizontal and vertical directions. An automatic tracking device (45) rotating in one direction; characterized in that: It also includes a cooker installed indoors, and a light transmission unit is arranged between the light concentrating unit and the cooker; The light transmission unit includes an optical fiber (41) and a light converter (42), the optical fiber (41) is a 10cm quartz fiber, the light converter (42) is located at the center of the condenser cover (44), The cooker (36) includes a cooker shell (8), an optical fiber socket (1) arranged on the cooker shell (8), a first lens (2), a reflective mirror (3), a second A focusing optical path formed by the lens (5) and the reflector (6), which focuses the light beam to the bottom of the cooker; The cooker also includes an adjustment structure for adjusting the distance between the second lens (5) and the bottom of the cooker, and the adjustment structure is composed of an adjustment knob (12), a second lens fixing plate (4) and a lifting transmission mechanism ; The optical fiber (41) is connected between the optical converter (42) and the optical fiber socket. 2. The indoor solar cooker using optical fiber to conduct solar energy according to claim 1, characterized in that: the automatic tracking device (45) includes a single-chip microcomputer, four photoresistors evenly distributed on the condenser cover (44), Vertical rotation transmission mechanism and horizontal rotation transmission mechanism. 3. The indoor solar cooker using optical fiber to conduct solar energy according to claim 2, characterized in that: the four photoresistors are arranged symmetrically on the center of the condenser cover (44) , down, left, and right, for collecting light intensity differences in the up and down and left and right directions of the condenser (44); the vertical rotation transmission mechanism and the horizontal rotation transmission mechanism are respectively provided with a step motor, and the The single-chip microcomputer sends instructions to the stepping motor according to the data transmitted by the photoresistor. 4. The indoor solar cooker utilizing optical fiber to conduct solar energy according to claim 1, characterized in that: the surface area of the light collecting cover is 2 to 4 square meters.

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