CN115950100A - A flat-plate pure solar air heat collector - Google Patents

Abstract

The invention discloses a flat plate type pure solar air heat collector, which comprises a shell and a metal wire grid, wherein a plurality of heat collecting cavities are sequentially arranged in the shell, the metal wire grid is arranged in the heat collecting cavities, the adjacent heat collecting cavities are communicated with each other, an air inlet used for entering cold air and an air outlet used for discharging hot air are formed in the shell, the air inlet is communicated with the heat collecting cavity at one end, and the air outlet is communicated with the heat collecting cavity at the other end; the invention achieves the purpose of improving the heat collection efficiency by arranging the plurality of heat collection cavities which are sequentially communicated in the shell and arranging the metal wire grids in the heat collection cavities, the plurality of arranged heat collection cavities can prolong the flowing distance of air in the heat collection cavities, more sufficient heat is gradually obtained in each heat collection cavity, and the purpose of enhancing the heat collection effect is further achieved.

Description

A flat-plate pure solar air heat collector

technical field

The invention relates to the technical field of solar heating and heat collection, in particular to a flat-plate pure solar air heat collector.

Background technique

Solar air heat collection technology is suitable for building heating, dehumidification, drying of agricultural products and other fields. The air heat collection system can be directly used in building air conditioning, heating and other fields without secondary conversion. The air heating system has many advantages such as high cost performance, simple structure, low initial investment, no leakage of working fluid, no freezing and convenient operation and maintenance. The production process of the air heat collection system is simple, the raw materials are from commercially available materials, the cost is low, and it has been mass-produced on a large scale. In the field of building heating, it is easy to realize the integration with the building. The heat collector can be installed on a sloping roof, a flat roof or a vertical wall. After the assembly of multiple heat collectors, the whole is a large air heat collector. There is only one air inlet and one air outlet, which is easy to install. The first solar collector in the world was developed by Americans in 1881. Since then, the technology and application of solar air heat collection have been greatly developed, but compared with liquid (water, oil, etc.) heat collection technology, solar air heat collection technology Still lagging behind.

Tibet is very rich in solar energy resources. It is the place with the most solar radiation in China. Compared with the plains at the same latitude, it is about twice as high, and the sunshine hours are also the most in China. At present, solar heating technology and its application using air as the heat transmission medium are rare in Tibet, but with its abundant solar energy resources, pure solar air heating technology is very suitable for building heating, dehumidification, and agricultural product drying in the alpine region of Tibet. Therefore, research And the development of solar air heat collection technology and products has practical application value.

The common problem of current solar heat collectors is that the heat collection efficiency is not high, and the cost is relatively high. For example, in a dual-function solar collector with the publication number CN203310122U, it includes an outer shell, a thermal insulation layer, a transparent cover plate, and a mesh heat absorber, which is composed of a metal mesh and a wire layer. , the combination method can be a layer of metal mesh and a layer of metal wire, or it can be two layers of metal mesh and a layer of metal wire in the middle. Heat-conducting liquid flow tubes are arranged in the wire layer of the heat absorbing body, and the inlet and outlet of the gaseous heat-conducting medium can also be set at the same time to connect the interior of the heat collector with external application components; the gaseous heat-conducting medium or liquid state in this technical solution The residence time of the heat transfer medium in the heat collector is too short, and the heat exchange will not be fully completed, resulting in low heat collection efficiency.

In order to solve the above problems, the present invention provides a flat-plate pure solar air heat collector to solve the problem of poor heat collection effect of conventional heat collectors.

Contents of the invention

The purpose of the present invention is to provide a flat-plate pure solar air heat collector to achieve the purpose of improving the heat collection efficiency of the heat collector.

To achieve the above object, the present invention provides the following scheme:

A flat-plate pure solar air heat collector, comprising a housing with several heat-collecting cavities sequentially arranged inside and wire grids arranged in several of the heat-collecting cavities, the adjacent heat-collecting cavities communicate with each other, so The casing is provided with an air inlet for entering cold air and an air outlet for hot air, the air inlet communicates with the heat collecting chamber at one end, and the air outlet communicates with the heat collecting chamber at the other end .

Preferably, the housing includes a frame, a cover plate and a back plate respectively covering the upper opening and the lower opening of the frame, and a plurality of partitions are arranged at intervals inside the housing, and a partition is formed between adjacent partitions. In the heat collecting cavity, through holes are provided on the partitions, and the through holes on the adjacent partitions are arranged in a staggered position.

Preferably, the cover plate is a Bayer polycarbonate solar panel.

Preferably, the frame, the back plate and the separator are stainless steel plates.

Preferably, the frame, the back panel and the partition are all provided with black spray paint.

Preferably, the connection positions of the frame, the back plate, the partition plate and the cover plate are all coated with sealant.

Preferably, the diameters of the air inlet and air outlet are 95mm to 100mm.

Preferably, the inclination formed between the air inlet direction of the air inlet and the plane where the wire mesh is located is 55:940 to 55:1000.

Compared with the prior art, the present invention has achieved the following technical effects:

1. The present invention achieves the purpose of improving heat collection efficiency by arranging several successively connected heat collecting cavities in the shell, and setting wire grids in the heat collecting cavities. The flow distance in the chamber gradually obtains more sufficient heat in each heat collecting chamber, thereby achieving the purpose of enhancing the heat collecting effect.

2. In the present invention, the casing includes a frame and a cover plate and a back plate respectively covering the upper opening and the lower opening of the frame. Several partitions are arranged at intervals inside the casing, and heat collecting chambers are formed between adjacent partitions. There are through holes on the top, and the through holes on the adjacent partitions are arranged in a dislocation; the air passes through the dislocated through holes from one of the heat collecting chambers to the other heat collecting chamber, which increases the air flow distance and prolongs the heat collection time. Enhance the heat collection effect of the air, avoid the through holes on the same cross section, the air just circulates along the through holes one by one, and the heat exchange with the metal wire grid in the heat collection cavity is not fully and comprehensively, resulting in poor heat exchange effect question.

3. The cover plate in the present invention is a Bayer polycarbonate solar panel, which belongs to a high light transmittance solar panel. The ideal light transmittance of the product is as high as 89%, and it has a long service life.

4. In the present invention, the frame, backboard and partition are stainless steel plates; the solar energy absorption ratio of stainless steel is 0.63-0.86, and the emissivity is 0.23-0.28, ranking high among various metals, and its tolerance is better, It is harder to rust than iron, can withstand wind and sun, and has a long life.

Description of drawings

In order to more clearly illustrate the present invention or the technical solutions in the prior art, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

Accompanying drawing 1 is the internal structure schematic diagram of the present invention;

Accompanying drawing 2 is the external structure schematic diagram of the present invention;

Among them, 1. wire grid; 2. frame; 3. through hole; 4. air outlet; 5. air inlet; 6. partition; 7. cover.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The purpose of the present invention is to provide a flat-plate pure solar air heat collector to achieve the purpose of improving the heat collection efficiency of the heat collector.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Figures 1 to 2, a flat-plate pure solar air heat collector includes a housing with several heat collecting cavities arranged in sequence inside and a wire grid 1 arranged in several of the heat collecting cavities, adjacent to each other The heat collecting cavities communicate with each other, and the housing is provided with an air inlet 5 for entering cold air and an air outlet 4 for discharging hot air, the air inlet 5 communicates with the heat collecting chamber at one end, and the outlet The tuyere 4 communicates with the heat collecting cavity at the other end; the present invention achieves the purpose of improving the heat collecting efficiency by arranging several heat collecting cavities connected in sequence in the housing, and setting a wire grid 1 in the heat collecting cavity. Each set of heat collecting chambers can prolong the flow distance of air in the heat collecting chambers, and gradually obtain more sufficient heat in each heat collecting chamber, thereby achieving the purpose of enhancing the heat collecting effect.

Referring to Fig. 1 to Fig. 2, the housing includes a frame 2 covering a cover plate 7 and a back plate on the upper opening and the lower opening of the frame 2 respectively, and a plurality of partitions 6 are arranged at intervals inside the housing, and between adjacent partitions 6 A heat collecting chamber is formed between them, and through-holes 3 are provided on the partitions 6, and the through-holes 3 on adjacent partitions 6 are arranged in dislocation; the air passes through the dislocated through-holes 3 from one of the heat-collecting chambers to the other In the heat collecting cavity, the air flow distance is increased, the heat collecting time is prolonged, the heat collecting effect of the air is enhanced, and the through holes 3 are prevented from being on the same cross section. The metal wire grid 1 is fully and comprehensively performing heat exchange, which leads to the problem of poor heat exchange effect; further, the positions of the two through holes 3 on the adjacent partition 6 are respectively located at the two ends of the partition 6, so when When the air enters another heat collecting cavity, it must completely pass through all the wire grids 1 located in the heat collecting cavity, so as to achieve the maximum air circulation distance, prolong the heat collecting time, and further enhance the heat collecting effect of the air.

Further, the cover plate 7 is a Bayer polycarbonate solar panel; it belongs to a high light transmittance solar panel, and the ideal light transmittance of the product is as high as 89%, and has a long service life.

Furthermore, the 2 frame, the back plate and the partition plate 6 are stainless steel plates; the solar energy absorption ratio of stainless steel is 0.63-0.86, and the emissivity is 0.23-0.28, which ranks high among various metals, and its durability is good. It is harder to rust than iron, can withstand wind and sun, and has a long life.

Further, the frame 2, the backboard and the partition 6 are all provided with black spray paint; on the one hand, the heat absorption efficiency of solar energy is increased, and on the other hand, the invention also has an anti-rust effect.

Further, the connection positions of the frame 2, the back plate, the partition plate 6 and the cover plate 7 are all coated with sealant.

Further, the diameters of the air inlet and the air outlet 4 are 95mm to 100mm.

Further, the inclination formed between the air intake direction of the air inlet and the plane where the wire mesh is located is 55:940 to 55:1000.

Adaptive changes made according to actual needs are within the protection scope of the present invention.

It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. . Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (8)

1. A flat-plate type pure solar air heat collector is characterized by comprising a shell and a metal wire grid, wherein a plurality of heat collecting cavities are sequentially arranged in the shell, the metal wire grid is arranged in the heat collecting cavities, adjacent heat collecting cavities are communicated with each other, an air inlet used for entering cold air and an air outlet used for discharging hot air are formed in the shell, the air inlet is communicated with the heat collecting cavity at one end, and the air outlet is communicated with the heat collecting cavity at the other end.

2. The flat plate type pure solar air heat collector according to claim 1, wherein the casing includes a frame, and a cover plate and a back plate respectively covering the upper opening and the lower opening of the frame, a plurality of partition plates are spaced inside the casing, a heat collecting cavity is formed between adjacent partition plates, each partition plate is provided with a through hole, and the through holes on adjacent partition plates are arranged in a staggered manner.

3. A flat panel solar-only air collector as claimed in claim 2 wherein said cover panel is a bayer polycarbonate sun panel.

4. The flat panel type pure solar air collector according to claim 2 wherein the frame, back panel and partition are stainless steel plates.

5. The flat plate type pure solar air heat collector according to claim 4, wherein the frame, the back plate and the partition plate are all provided with black paint.

6. The flat plate type pure solar air heat collector according to claim 5, wherein the connection positions of the frame, the back plate, the partition plate and the cover plate are coated with sealant.

7. A flat panel solar-only air collector as in claim 1 wherein the diameter of the inlet and outlet ports is 95mm to 100mm.

8. The flat plate type pure solar air collector according to claim 1, wherein the inclination formed by the air inlet direction of the air inlet and the plane of the wire mesh is 55:940 to 55:1000.

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