CN101957075B - Secondary reflecting disc type lighting solar water heater with closed chamber - Google Patents

Abstract

The invention relates to a secondary reflecting disc type lighting solar water heater with a closed chamber. The device receives solar energy through the reflecting and focusing action of a large plane reflector and a rotary parabolic reflector, can greatly improve the receiving efficiency of solar energy and can be used for collecting and receiving the solar energy in the environment of strong light or dim light.

Description

Secondary Reflection Disc-shaped Closed Cavity Daylighting Solar Water Heater

Technical field:

The invention relates to a solar energy application technology, in particular to a solar water heater with a secondary reflective disk-shaped closed cavity for daylighting by using the principle of concentrating light on a rotating paraboloid to receive solar energy. The efficiency of solar energy reception.

Background technique:

Solar energy is a kind of clean energy, inexhaustible and inexhaustible, and will not cause environmental pollution. Nowadays, whether in coastal cities or inland cities, solar energy products are increasingly entering people's field of vision. Solar street lights, solar lawn lights, solar garden lights, solar corridor lights, bus station lights, traffic lights, etc., all kinds of solar water heaters have also approached thousands of households. But most of these solar products do not have light concentrating function, resulting in low utilization rate of solar energy. If the light intensity on the surface of the solar receiving element is doubled, the receiving efficiency of the solar receiving element will be doubled. At present, the focus of technological competition in the solar industry is mainly the competition for solar receiving efficiency. It can be seen that improving the receiving efficiency is important to the entire industry. Therefore, whether Effectively improving the light intensity of solar receiving elements has become the most concerned issue when people utilize solar energy.

In recent years, foreign countries have achieved concentrated solar energy reception in the photovoltaic matrix of some solar power plants, and there are similar test devices in China, but these devices are complex in structure, bulky and expensive, and it is difficult to promote them in solar household products.

Invention content:

In order to overcome the shortcomings of the existing concentrating device, such as complex mechanical structure, bulky volume, and high cost, the present invention aims at the deficiencies of the existing technology, improves the existing technology, and proposes a small volume, simple and reliable structure, and low cost The solar concentrated light receiving device, which can realize the concentrated light reception of solar energy.

The technical solution adopted by the present invention to solve the technical problem is: a plurality of solar energy concentrating receiving mechanisms are installed in a rectangular box, a water tank is installed above the rectangular box, and a flat transparent surface is covered on the rectangular box. The cover plate, the flat transparent cover plate seals each solar concentrating receiving mechanism in a rectangular box. The receiver is composed of a solar concentrating receiving mechanism divided into multiple groups. A rectangular large flat reflector is installed in front of each group of solar concentrating receiving mechanism. There is a long and straight light incident slit in the direction, and the large plane reflectors of each group of solar concentrating receiving mechanisms intersect with the plane transparent cover to form an angle of 45°.

The light energy receiver of each solar concentrating receiving mechanism is composed of a disc-shaped hollow heat-conducting cavity, a conical reflector and a hemispherical transparent light guide cover. There is a light incident circular hole on the top of the conical reflector. , the conical surface reflector of each light energy receiver is tightly covered on the disc-shaped hollow heat conduction cavity of the light energy receiver, and the hemispherical transparent light guide cover of each light energy receiver is covered on the light energy receiver. The light of the conical surface reflector is incident on the circular hole, and the hemispherical transparent light guide cover of each light energy receiver, the disc-shaped hollow heat conduction cavity and the conical surface reflector form a closed cavity.

The light energy receiver of each group of solar energy concentrating receiving mechanism is installed on the back side of the reflective surface of this group of large plane reflectors, and the circle of each disc-shaped hollow heat conducting cavity of the light energy receiver of each group of solar concentrating receiving mechanism The disc plane is facing the light incident slit of the large flat reflector of the group and the disc plane of each disc-shaped hollow heat-conducting cavity is facing the reflective surface of the rotating parabolic reflector, and the light energy of each solar concentrating receiving mechanism The center of the disc plane of the disc-shaped hollow heat-conducting cavity of the device is located on the symmetry axis of the rotating parabolic reflector of the solar concentrating receiving mechanism, and the disc-shaped hollow heat-conducting cavity of the light energy receiver of each solar concentrating receiving mechanism The disc plane of the body is perpendicular to the symmetry axis of the rotating parabolic mirror of the solar concentrating receiving mechanism, and the center of the light incident circular hole of the conical surface reflector of the light energy receiver of each solar concentrating receiving mechanism and the hemispherical transparent guide The spherical center of the light cover coincides with the focus of the rotating parabolic reflector of the solar concentrating receiving mechanism, and the focus of the rotating parabolic reflector of each group of solar concentrating receiving mechanism is located on the light incident slit of the large plane reflector of the group ,

When the sunlight is incident perpendicular to the plane transparent cover plate, the incident light can pass through the light incident slits and The light incident circular hole of the conical surface reflector is irradiated on the disc-shaped hollow heat-conducting cavity of each light energy receiver, and the light energy irradiated on the disc-shaped hollow heat-conducting cavity of each light energy receiver passes through each light energy receiver The disc-shaped hollow heat conduction cavity of the device is converted into heat energy, because the hemispherical transparent light guide cover of each light energy receiver, the disc-shaped hollow heat conduction cavity and the conical reflector form a closed cavity, and each conical surface reflects light The light incident round hole of the mirror is very small, and the light entering the light incident round hole of each conical reflector is reflected by the conical reflector of each light energy receiver and irradiates the disc-shaped hollow heat conduction of each light energy receiver for many times. On the cavity body, most of the light energy is converted into heat energy in the closed cavity, so the light-to-heat conversion rate of each light energy receiver is greatly improved.

The beneficial effects of the present invention are: through the reflective focusing effect of each rotating parabolic reflector, the intensity of sunlight irradiated on each light energy receiver is greatly improved, thereby greatly improving the photothermal conversion rate of each light energy receiver, realizing In order to have a high light-to-heat conversion rate in the environment of strong light and low light.

Description of drawings:

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

Fig. 1 is the overall structure diagram of the present invention.

Fig. 2 is A-A sectional view of the overall structure diagram of the present invention.

Fig. 3 is a B-B sectional view of the overall structure diagram of the present invention.

Fig. 4 is an enlarged view of a cross-sectional view of a solar concentrating receiving mechanism according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of a paraboloid of revolution.

In the composition diagram of the paraboloid of revolution in Fig. 5: the paraboloid of revolution S, the quasi-plane S1 of the paraboloid of revolution, the apex O of the paraboloid of revolution, the focal point f of the paraboloid of revolution, and the symmetry axis L of the paraboloid of revolution.

Detailed ways:

In Fig. 1, Fig. 2 and Fig. 3, 25 solar concentrating receiving mechanisms are installed in a rectangular box 3-1, and the 25 solar concentrating receiving mechanisms are divided into five groups. A water tank 8-1 is installed above the rectangular box body 3-1, and a plane transparent cover plate 4-1 is covered on the rectangular box body 3-1. In -1, each solar concentrating receiving mechanism is neatly arranged in the rectangular box 3-1, and each solar concentrating receiving mechanism is composed of a rotating parabolic reflector and a light energy receiver.

Large flat reflector 1-1-1 is all installed in front of the reflective surface of the rotating parabolic reflector of the first group of solar concentrating receiving mechanism, and all is installed in front of the reflective surface of the rotating parabolic reflector of the second group of solar concentrating receiving mechanism Large plane reflector 1-1-2 has been installed, and large plane reflector 1-1-3 has been installed in the front of the reflective surface of the rotating parabolic reflector of the third group of solar concentrating receiving mechanism, and in the fourth group of solar concentrating Large plane reflectors 1-1-4 are installed in front of the reflective surface of the rotating parabolic reflector of the receiving mechanism, and large flat reflectors 1 are installed in front of the reflective surface of the rotating parabolic reflector of the fifth group of solar concentrating receiving mechanisms -1-5, the middle seat of the above-mentioned five large plane reflectors is provided with a long and straight light incident slit along its long side direction, and the above-mentioned five large plane reflectors intersect with the plane transparent cover plate 4-1 to form 45 ° angle, the hemispherical hollow heat conduction chambers of the first group of solar concentrating receiving mechanisms are connected in series through heat pipes 9-1-3, and the hemispherical hollow heat conducting cavities of the second group of solar concentrating receiving mechanisms pass through heat pipes 9 -2-3 are connected in series, the hemispherical hollow heat conduction cavity of the third group of solar concentrating receiving mechanism is connected in series through heat pipe 9-3-3, the hemispherical hollow heat conducting cavity of the fourth group of solar concentrating receiving mechanism The cavities are connected in series through heat pipes 9-4-3, the hemispherical hollow heat conduction chambers of the fifth group of solar concentrating receiving mechanisms are connected in series through heat pipes 9-5-3, heat pipes 9-1-3 , heat pipe 9-2-3, heat pipe 9-3-3, heat pipe 9-4-3 and the lower end of heat pipe 9-5-3 communicate with water tank 8-1 through cold water pipe 9-1-2, conduct heat The upper end of pipe 9-1-3, heat pipe 9-2-3, heat pipe 9-3-3, heat pipe 9-4-3 and heat pipe 9-5-3 passes through hot water pipe 9-1-1 and Water tank 8-1 communicates.

Provided in Fig. 4 is the structure of the first solar energy concentrating receiving mechanism, in Fig. 4 the first solar concentrating receiving mechanism is made of rotating parabolic reflector 1-2-1 and light energy receiver 1-3-1, light energy The receiver 1-3-1 is composed of a disc-shaped hollow heat-conducting cavity 5-1, a conical surface reflector 7-1 and a hemispherical transparent light guide cover 6-1, and the top of the conical surface reflector 7-1 has a The light enters the circular hole,

The conical surface reflector 7-1 is tightly covered on the disc-shaped hollow heat conduction cavity 5-1, and the hemispherical transparent light guide cover 6-1 is covered on the light incident circular hole of the conical surface reflector 7-1. The transparent light guide cover 6-1, the disc-shaped hollow heat conducting cavity 5-1 and the conical reflector 7-1 form a closed cavity,

The light energy receiver 1-3-1 is installed on the back of the reflective surface of the large plane reflector 1-1-1, and the disk plane of the disc-shaped hollow heat conducting cavity 5-1 faces the large plane reflector 1-1- The light incident slit of 1, the disk plane of the disc-shaped hollow heat-conducting cavity 5-1 is facing the reflective surface of the rotating parabolic reflector 1-2-1, and the disc-plane of the disc-shaped hollow heat-conducting cavity 5-1 The center of the circle is located on the axis of symmetry of the rotating parabolic mirror 1-2-1, the disk plane of the disc-shaped hollow heat conduction cavity 5-1 is perpendicular to the axis of symmetry of the rotating parabolic mirror 1-2-1, and the conical surface mirror The center of the light incident circular hole of 7-1 and the center of the sphere of the hemispherical transparent light guide cover 6-1 coincide with the focus of the rotating parabolic mirror 1-2-1, and the focus of the rotating parabolic mirror 1-2-1 is located at On the light incident slit of the large plane mirror 1-1-1,

When sunlight is incident perpendicular to the plane transparent cover plate 4-1, the incident light can pass through the large plane reflector 1-1-1 and the reflection focusing of the rotating parabolic reflector 1-2-1 through the large plane reflector 1- The light incident slit of 1-1 and the light incident circular hole of the conical reflector 7-1 are irradiated on the disc-shaped hollow heat-conducting cavity 5-1, and the light irradiated on the disc-shaped hollow heat-conducting cavity 5-1 Can be converted into heat energy through the disc-shaped hollow heat-conducting cavity 5-1, because the hemispherical transparent light guide cover 6-1, the disc-shaped hollow heat-conducting cavity 5-1 and the conical reflector 7-1 form a closed cavity , and the light incident round hole of the conical surface reflector 7-1 is very small, the light entering the light incident circular hole of the conical surface reflector 7-1 is repeatedly irradiated on the disc-shaped hollow through the reflection of the conical surface reflector 7-1 On the heat conduction cavity 5-1, most of the light energy is converted into heat energy in the closed cavity, thus greatly improving the light-to-heat conversion rate of the light energy receiver 1-3-1. , the dimensions and the process of receiving light energy are the same as those of the first solar concentrated light receiving mechanism.

Claims (1)

1. secondary reflection disc closed housing daylighting solar water heater; By rectangular box; Water tank; Cold water pipe; Hot-water line; The planar transparent cover plate; Big plane mirror and Salar light-gathering receiving mechanism constitute; Each Salar light-gathering receiving mechanism all is made up of a paraboloid of revolution reflective mirror and a luminous energy receiver; The luminous energy receiver of each Salar light-gathering receiving mechanism is all by a hollow heat conduction cavity of disc; A taper seat reflective mirror and a hemisphere face transparent light guide lid constitute; The Salar light-gathering receiving mechanism is divided into many groups; The square big plane mirror of a block length has all been installed in front at each group Salar light-gathering receiving mechanism; The middle part of the big plane mirror of each group has a long straight light entrance slit along its long side direction; Each big plane mirror and planar transparent cover plate of organizing the Salar light-gathering receiving mechanism intersects 45; It is characterized in that: each luminous energy receiver of organizing the Salar light-gathering receiving mechanism is installed in the back side of reflective surface of the big plane mirror of this group; Each organizes the reflective surface of disk plane over against the disk plane of the light entrance slit of the big plane mirror of this group and the hollow heat conduction cavity of each disc over against this paraboloid of revolution reflective mirror of the hollow heat conduction cavity of each disc of the luminous energy receiver of Salar light-gathering receiving mechanism; The center of circle of the disk plane of the hollow heat conduction cavity of disc of the luminous energy receiver of each Salar light-gathering receiving mechanism is positioned on the symmetry axis of paraboloid of revolution reflective mirror of this Salar light-gathering receiving mechanism; The disk plane of the hollow heat conduction cavity of disc of the luminous energy receiver of each Salar light-gathering receiving mechanism is perpendicular to the symmetry axis of the paraboloid of revolution reflective mirror of this Salar light-gathering receiving mechanism; The focus of the centre of sphere of the center of circle of the light incident circular hole of the taper seat reflective mirror of the luminous energy receiver of each Salar light-gathering receiving mechanism and hemisphere face transparent light guide lid and the paraboloid of revolution reflective mirror of this Salar light-gathering receiving mechanism overlaps; Each focus of organizing the paraboloid of revolution reflective mirror of Salar light-gathering receiving mechanism is positioned on the light entrance slit of big plane mirror of this group

When sunshine during perpendicular to the incident of planar transparent cover plate; Can both pass the light entrance slit of big plane mirror behind the reflect focalization of big plane mirror and the paraboloid of revolution reflective mirror of incident ray through each group Salar light-gathering receiving mechanism and the light incident circular hole of taper seat reflective mirror is radiated on the hollow heat conduction cavity of disc of each luminous energy receiver; The luminous energy that is radiated on the hollow heat conduction cavity of disc of each luminous energy receiver converts heat energy into through the hollow heat conduction cavity of the disc of each luminous energy receiver; Hemisphere face transparent light guide lid, the hollow heat conduction cavity of disc and closed cavities of taper seat reflective mirror formation because of each luminous energy receiver; And the light incident circular hole of each taper seat reflective mirror is very little; The light that gets into the light incident circular hole of each taper seat reflective mirror repeatedly is radiated on the hollow heat conduction cavity of disc of each luminous energy receiver through the reflection of the taper seat reflective mirror of each luminous energy receiver; The major part of luminous energy changes heat energy in closed cavities, therefore significantly improved the photo-thermal conversion ratio of each luminous energy receiver.

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