JPS58150753A - Beam-condensing type heat collector - Google Patents

Abstract

PURPOSE:To contrive to miniaturize a tracking mechanism by disposing a reflecting mirror for reflecting solar rays toward a condenser lens arranged in elevation-angle changeable form and providing a tracking mechanism operating the elevation angle. CONSTITUTION:A sealed heat-insulating housing 3 is fixed to a stand 8 under the state in which a Fresnel lens 1 is positioned at a section lower than a heat collecting pipe 2 and at a downward attitude while a plane mirror 4 for reflecting solar rays toward the Fresnel lens 1 is disposed in elevation-angle changeable shape by oscillation around a shaft 5 in the east and west direction, and the tracking mechanism 6 varying, fixing and operating the elevation angle so that an angle of incidence to the Fresnel lens 1 of reflected rays is made constant or approximately constant regardless of the change of solar altitude in the daytime at every one week unit is provided. Relative positions between the Fresnel lens 1 and the tracking reflecting plane mirror 4 may be determined so that solar rays (a) going pass by the southern end of the lens 1 at the summer solstice southing are projected to the northern end of the plane mirror 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is mainly used for solar air conditioning and hot water supply, and particularly relates to a lens condensing type heat collecting device using a 7-renel lens or a convex lens, rather than a reflective type.

Although such a concentrating type heat collecting device can collect high temperature heat and has a wide range of uses, conventionally known devices of this kind have a condensing lens (tl) and its concentrator as shown in Fig. 4. The optical lens ψ is placed at the focal point or at the heat collecting tube located at the radio equivalent point) and the hermetically insulated housing is equipped with a hermetically sealed insulated housing. In the state of The conventional device was configured with a tracking mechanism (-), but in this conventional device, the entire housing including the condensing lens and the island condensing tube is used for tracking, so the tracking drive load is reduced. Unfortunately, there was a drawback that the entire mechanism was large and equipment costs were high. In view of these circumstances, the present invention has been developed by adding a reflector to the conventional system, without reducing heat collection efficiency.
The condensing type heat collecting device invented by Kuchiju, which aims to make the tracking mechanism more compact and economical, uses a condensing lens and a focal point of the condensing lens, which is located at a point where the focal lines communicate. an intercalated heat insulating housing comprising a heat tube; the condenser lens is fixed in a position below the heat condenser tube; reflector vty
The axis of rotation in the y and s directions is arranged so that the angle of elevation can be changed freely.
In addition, a tracking mechanism for changing and fixing the elevation angle of the reflecting mirror is provided.Since it has a t4I configuration, the following functions and effects can be obtained, compared to the conventional device described above. Therefore, the device of the present invention requires a reflector as an additional component, but this reflector may be lightweight considering its function, and the nine-weight hermetically insulated housing, which is equipped with a condensing lens and a heat collecting tube, is fixedly installed. Since only a reflecting mirror such as a bottle or a lightweight plane mirror needs to be operated for tracking, the tracking drive load is significantly smaller than in the past. Heat action can be carried out
4, the tracking mechanism has been made smaller and the equipment cost has been reduced.

When implementing the device of the present invention, when using a rectangular (Kamabob-shaped) line condensing type Fresnel lens tube along the east-west direction as a condensing lens, the effective light condensing time of 18 and 9 can be increased. In addition, compared to the case of a single convex lens, there is an advantage that less material is used and K11 can be manufactured at a lower cost. However, a convex lens may be used as the condenser lens.

In addition, if a Taber rmo pipe is used as a sealed WfrlIl & housing which gradually becomes narrower as it reaches the heat collecting pipe side, the warehouse will be
Inside the space that was warmed by the light condensing action! The air is concentrated in the heat collecting pipe part, reducing O heat radiation loss from the heat collecting pipe and t! j, there is an advantage that the heat collection efficiency can be further improved as a whole. 〇 Below, Embodiment 1 of the present invention To be described in detail based on the drawings, in I11 @ (17t! An example of a condensing lens, it is rectangular (kamabob shape) and It is a Fresnel lens that focuses line light along the line - Eve's Fresnel lens. 0 (3) is a heat collecting pipe arranged in which a liquid or gas pipe is allowed to flow inside. 0 (3) is a hermetically insulated housing whose bottom side is constructed of a tapered tube whose width is gradually narrowed. As clearly shown in Fig. 2, glass wool (8B) for preventing heat conduction loss is sandwiched on the entire inner circumferential surface of the iron plate housing body (8 people) except for the opening St, which is marked with black spots. In order to return the radiant heat inside the Ujinda inward, it is constructed with a mirror made of glass or aluminum laminate (SC), and its opening is the 7-lens lens (
1) is fully supported, and the heat collecting pipe is inserted and supported in the housing near the first part, and the heat collecting pipe is a glass pipe having a low reflection surface on the outside. The space between the pipe (1) and the heat collecting tube body is evacuated or air is sealed therein.

Then, the hermetically insulated housing (3) t1 as described above is fixed to the stand (1) K in a state 111 in which the Fresnel lens (1) is positioned in a downward position below the heat collecting pipe (ri), and the housing ( j) below W6,
A plane mirror (4) as a reflecting mirror for reflecting the solar ray tube toward the 7-Renel lens (1) is connected to the east-west axis (5).
The Fresnel lens (4) is arranged so that the elevation angle can be freely changed by the rocking of the debris, and that the elevation angle of the plane mirror (4), for example, a Fresnel lens ( υ
Tracking mechanism (6) that is changed and fixed so that the incident angle is constant or almost constant ◎The relative position of the Fresnel lens (1) and the tracking reflection plane mirror (4) is theoretically determined by the sun's rays (a) that grazed the southern end of the lens (1) at the mid-summer solstice. All you have to do is decide so that it will be incident on the north end of the plane mirror (4), but if you draw out the 11-ring KIs with reference to Figure 8 as a design document, you will get the following formula: When the lens and lens planes are horizontal (as shown in Figure 8), conditions under which the lens will not be in the shadow.However, #1: The minimum tilt angle of sunlight is about 10 degrees (summer solstice), and the maximum is about 60 degrees (winter solstice) Lens mt When tilted (Fig. 8 @) K>, the lens does not become in the shadow.However, #Hiroshi: Inclination angle of the lens surface According to the above ■ formula, 0<0Sagi≦70&, ffl Bottle, 1
The result is 0f≦#Snow≦60 degrees.

Considering the minimum width of the t1 plane mirror, that is, the entire width of the lens to allow the reflected light to enter, #X −H(−180Q−(θtmx+#m−■ Therefore) , 01 is determined, #X, X, obtained by the above formula
and θ1+θ8, and from these, Wm can be easily determined using the usual trigonometric formula. In the case of concentrating heat collection mainly based on 0 snow -01m field It is desirable to determine the practical range based on the minimum separation dimension of 0 between the lens and the plane mirror.

The above has explained an example in which the reflecting mirror (4) is an upper plane mirror, but as the reflecting mirror (4), a cylindrical concave mirror with no removal material Wt on the paper surface of the first @ and a straight line in the direction perpendicular to the paper surface is used. You may do so.

[Brief explanation of the drawing]

! The first page shows an example of the water concentrating type heat collecting device according to the present invention.
11115!11 is the overall schematic diagram, 2nd! 71 is an enlarged longitudinal cross-sectional view of the main part, Figure 8 (A) is an analysis diagram of the design conditions, and Figure 4 is an overall schematic diagram of the conventional device. (1)...
・Condensing lens, (2)... Heat collecting tube, (8)...
...Housing, (4) ...Reflector, (I
s)... Electrographic direction axis, (6)... Tracking mechanism. =21

Claims (1)

[Scope of Claims] ■ A hermetically insulated housing (3) comprising a condensing lens (1) and a fish collecting tube (2) located at the focal point t of the condensing lens (1) or at a location corresponding to the radio; Condensing lens (1
) is % lower than the heat collecting pipe (2)! At the same time, a reflector (4) that reflects sunlight toward the condensing lens (1) is mounted below S of the housing (3) and oscillated by an axis of (3) ml in the east-west direction. A tracking mechanism (6) is provided which allows the angle of elevation to be changed freely by movement, and which changes and fixes the angle of elevation of the reflecting mirror (4).
Features a concentrating heat collecting device. ■ The condensing type heat collecting 1111° according to claim 0, wherein the condensing lens (1) is a rectangular Fresnel lens. The condensing type heat collecting device according to claim 0, which is configured as a Taber type device whose width becomes gradually narrower.