CN201138091Y - Baffle type double effect heating solar air collector - Google Patents

Abstract

The utility model relates to a baffle type double-effect heating solar air heat collector, which comprises a thermal insulation bottom plate and a heat collector core, the heat collector core includes a heat absorption plate installed on the thermal insulation bottom plate, and the space between the heat absorption plate and the heat preservation bottom plate is It has a closed heating air duct; a horizontal first air inlet pipe and a horizontal air outlet pipe are arranged above the heat absorbing plate, a horizontal bottom bracket is arranged under the heat absorbing plate, and a closed second air inlet is arranged inside the bottom bracket. The air pipe, the bottom bracket and the air outlet pipe are sealed with heat collecting tubes arranged at vertical intervals, and the heat collecting pipes are located above the surface of the heat absorbing plate; The air inlet pipe is connected, and the upper and lower ends of the heat collecting pipe are connected with the corresponding air outlet pipe and the second air inlet pipe; a glass cover that buckles the heat collector core is installed on the heat preservation bottom plate. The structure is heated twice, and the heating distance is nearly doubled, which improves the heat absorption efficiency, strengthens the heating effect, and makes the air temperature rise faster in one cycle.

Description

Baffle type double effect heating solar air collector

technical field

The utility model relates to the technical field of solar heat utilization, in particular to a solar air heat collector.

Background technique

At present, there are two types of solar air collectors commonly used: plate type and heat collecting tube type. The plate type heat collector is mainly composed of an insulating base plate with an insulating frame around it, a heat collecting plate core and a glass cover set on the insulating base plate. The heat collecting tube type heat collector is mainly composed of inlet and outlet pipes and several heat collecting tubes arranged side by side. Regardless of the structure, when the air enters the heat collector, it is directly discharged from the heat collector and sent to the place where hot air is needed after being heated once in a single pass. Due to the limitation of the structure and specifications of the heat collector, The heatable distance and time that the air flows through in the heat collector are relatively short, and it cannot absorb heat to the maximum extent, so the temperature rise of the air after one cycle is small; in addition, the hot air in this type of heat collector is naturally It is flowing, the circulation speed is too slow, and the system temperature cannot be adjusted according to the needs, which is mostly inconvenient to use. It can be seen that the heat collection rate of the above-mentioned air heat collector has not been maximized, and heat collection and heat gain cannot be maximized.

As we all know, in solar thermal utilization technology, an important technical key is how to efficiently collect sunlight and maximize it into heat energy, so research and development of new high-efficiency solar collectors to maximize the use of solar energy is The goal that researchers in the field of solar thermal applications have always pursued is to extend solar thermal utilization to medium and high temperature heating systems is also a research and development direction of solar thermal utilization.

Utility model content

The purpose of the utility model is to provide a baffle type double-effect heating solar air heat collector with better air heat absorption effect, larger temperature rise in one cycle and higher heat collection rate.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the baffle type double-effect heating solar air heat collector includes a thermal insulation bottom plate and a collector core installed on the thermal insulation bottom plate, and the collector core includes The heat-absorbing plate has a closed heating air duct between the heat-absorbing plate and the heat-insulating bottom plate; a horizontal first air inlet pipe and a horizontal air outlet pipe are arranged above the heat-absorbing plate, and a horizontal air duct is arranged below the heat-absorbing plate. The bottom bracket, the bottom bracket is provided with a closed second air inlet pipe, and the bottom bracket and the air outlet pipe are sealed with heat collecting tubes arranged at vertical intervals, and the heat collecting tubes are located above the heat absorbing plate surface; the heating air duct The upper and lower ends communicate with the corresponding first and second air intake pipes, and the upper and lower ends of the heat collecting pipe communicate with the corresponding air outlet pipe and the second air intake pipe; The glass cover body of the core forms a closed space between the glass cover body and the thermal insulation bottom plate.

The left and right sides of the heat-absorbing plate are inclined outwards to one side of the heat-insulating bottom plate and then bent horizontally, and the heat-absorbing plate is bonded and fixedly connected to the heat-insulating bottom plate through its horizontally bent part; The lower two ends are the closed ends of the heating air duct, and gas connecting pipes are arranged at the transverse central parts of the upper and lower closed ends, and the heating air duct communicates with the corresponding first and second air intake pipes through the gas connecting pipes.

The parts of the left and right symmetrical centerlines on the heat absorbing plate are recessed outwards to form arc-shaped ribs.

There are multi-layer gradient selective absorption films on the upward sun-facing surface of the heat-absorbing plate body.

The heat-collecting tube includes a glass tube and a heat-absorbing tube set in the glass tube. Both ends of the heat-absorbing tube are open and extend out of the corresponding ends of the glass tube respectively. There is a vacuum interlayer between the heat-absorbing tube and the glass tube. The surface of the heat pipe has a selective absorption coating; the two ends of the heat-collecting pipe protruding from the heat-absorbing pipe are inserted into the outlet pipe and the bottom bracket, and the heat-collecting pipe passes through the heat-absorbing pipe, the outlet pipe, and the second air intake in the bottom bracket. Pipe connection.

The heat-absorbing pipe is a copper pipe or a stainless steel pipe. The glass tube is a high borosilicate glass tube. The connecting parts of the heat collecting pipe, the air outlet pipe and the bottom bracket are sealed by a sealing body.

The outlet of the air outlet pipeline is provided with a pump body.

In the utility model, the heat collector core is placed in the airtight space between the glass cover body and the heat preservation bottom plate. The temperature environment where the core is located is relatively stable. The air enters the heating air duct from the inlet of the first air intake pipe, and is heated for the first time in the air duct, and then is deflected by the second air intake pipe and distributed to each heat collecting tube for the second heating. The air outlet pipe is discharged to the place where hot air is needed. Since the collector core realizes the double-effect heating of the heat-absorbing plate of the air and the heat-collecting tube, the heating distance is nearly doubled, the heating distance is long, and the heating time is long, so the heat-absorbing efficiency is effectively improved and the heat-absorbing effect is enhanced. , Make the temperature of the air cycle rise faster, and the heat collection efficiency is higher.

In the whole device, the bottom bracket is also used as the second air intake pipe, and the air outlet pipe is also used as a support and connected to the heat collecting pipe, so that the overall structure is compact and simple. The arc-shaped ribs of the heat-absorbing plate body are used to increase the diameter of the air inlet and outlet connecting pipes, and at the same time increase the strength of the plate body; the multi-layer gradient selective absorbing film on the heat-absorbing plate can achieve a solar absorption rate of up to More than 93%, the heat collection rate is higher, and the heat radiation rate is lower than 6%, so that the heat loss is smaller; and this heat-absorbing coating layer is not easy to age and fall off, so that the service life of the heat-absorbing plate is significantly improved.

The heat collecting tube adopts a straight-through vacuum interlayer structure, the outer layer is a high borosilicate glass tube, and the heat absorbing tube is made of copper tube with high thermal conductivity, so the heat collecting tube has good light transmission, high thermal efficiency and low heat loss; the inner heat absorbing tube Plating selective absorption coating can effectively improve the heat absorption efficiency and make the temperature rise faster. The two ends of the heat-absorbing pipe extend out of the two ends of the glass tube correspondingly, which is beneficial to the sealed assembly of the heat-collecting pipe, the bottom bracket and the air outlet pipe.

The pump body configured in the device is used to accelerate the flow rate of the air, so that the efficiency of the whole device can be improved faster, and the temperature of the system can be controlled by controlling the speed of the pump body, which is more convenient to use. The use of a sealing body can further reduce heat loss.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the B-B sectional view of Fig. 1;

Fig. 3 is A-A sectional view of Fig. 1;

Fig. 4 is a structural schematic diagram of the heat collecting tube in the utility model.

Detailed ways

The baffle type double-effect heating solar air heat collector shown in Fig. 1-Fig. 4 comprises heat preservation bottom plate 6 and the heat collector core installed on the heat preservation bottom plate, is also installed on the heat preservation bottom plate to buckle the heat collector core The glass cover body 8 forms a closed space between the glass cover body 8 and the thermal insulation bottom plate 6 .

The heat collector core includes a heat-absorbing plate 4 installed on the heat-insulating bottom plate. The left and right sides of the heat-absorbing plate 4 are bent outwardly toward one side of the heat-insulating bottom plate 4 and then bent horizontally. The heat-absorbing plate 4 passes through its horizontal The bent part fits and is fixedly connected with the heat-insulating bottom plate 6; the upper and lower ends of the heat-absorbing plate 4 are provided with closed ends, and a closed heating air duct 14 is formed between the heat-absorbing plate 4 and the heat-insulating bottom plate 6; the heat-absorbing plate 4. The parts of the upper, left and right symmetrical centerlines are recessed outward to form arc-shaped ribs, and gas connecting pipes 12 are provided at the transverse central parts of the upper and lower closed ends. Magnetron sputtering technology is used to coat the surface of the heat-absorbing plate facing the sun with multi-layer gradient selective absorption film; the heat-absorbing plate body is made of anti-corrosion and heat-conducting metal plate, and the bending and arc-shaped ribs on it Formed by pressing process. Above the heat absorbing plate 4, a horizontal first air inlet duct 5 and a transverse air outlet duct 7 are arranged, and a transverse bottom bracket 1 is arranged below the heat absorbing plate 4, and a sealed second air inlet is arranged inside the bottom bracket 1. The heating duct 14 communicates with the corresponding first and second air intake ducts through the gas connection passages 12 at its upper and lower ends. A pump body 10 is arranged at the outlet of the air outlet pipe.

Between the bottom bracket 1 and the air outlet pipe 7, heat collecting tubes 3 arranged vertically at intervals are sealed and arranged, and the heat collecting tubes 3 are located above the surface of the heat absorbing plate. The heat collecting tube 3 comprises a glass tube 15 and a heat absorbing tube 16 which is sleeved in the glass tube. There is a vacuum interlayer between them, and the surface of the heat-absorbing pipe 16 has a selective absorption coating; the two ends of the heat-collecting pipe protruding through the heat-absorbing pipe 16 are inserted on the outlet pipe 7 and the bottom bracket 1, and the heat-collecting pipe passes through the heat-absorbing pipe 16 and The air outlet duct 7 communicates with the second air intake duct in the bottom bracket 1 . The heat-absorbing pipe 16 can be a copper pipe or a stainless steel pipe, the glass pipe 15 is a high borosilicate glass pipe, and the connection between the heat-collecting pipe 3 and the outlet pipe 7 and the bottom bracket 1 is sealed by the sealing body 2 .

The running process of the air in the heat collector in the utility model is as follows: the air enters from the inlet of the first air intake pipe 5, enters the heating air duct 14 through the connecting channel 12 at the upper end to be heated for the first time, and passes through the connection at the lower end. The channel enters the second air intake pipe 12, and after deflection, it is divided into the heat-absorbing pipes of each heat collecting pipe 3 for the second heating. The heated gas enters the air outlet pipe 7, is sucked by the pump body 10, and is transported to the heat-absorbing pipe that needs hot air. The place.

The utility model can increase or decrease the number of heat collecting tubes according to the actual situation, and can also adjust the flow rate of the pump body according to the actual situation, so that it is suitable for solar heating, solar drying and other places where solar hot air is needed in different situations.

Claims (10)

1. tortuous flow doubleeffect heating solar heat-collector air heat collectors, comprise the insulation base plate and be installed in the heat collector core that is incubated on the base plate, it is characterized in that: the heat collector core comprises the absorber plate that is installed on the insulation base plate, has the airtight hot-flow flue that adds between absorber plate and the insulation base plate; Above absorber plate, be provided with first horizontal admission line and horizontal outlet pipe, the below of absorber plate is provided with horizontal lower supporter, be provided with the second airtight admission line in the lower supporter, sealing is provided with and is vertical spaced thermal-collecting tube between lower supporter and the outlet pipe, and thermal-collecting tube is positioned at the top of absorber plate plate face; Add the upper/lower terminal of hot-flow flue and first, second corresponding admission line connection, the upper/lower terminal of thermal-collecting tube and corresponding outlet pipe, second admission line are communicated with; On the insulation base plate, the glass cover body that fastens the heat collector core is installed, forms enclosure space between glass cover body and the insulation base plate.

2. tortuous flow doubleeffect heating solar heat-collector air heat collectors according to claim 1, it is characterized in that: the level bending again after the lopsidedness of insulation base plate outwards bends of the left and right both sides of described absorber plate, absorber plate post and fix with the insulation base plate by its horizontal bending part and are connected; The upper/lower terminal of absorber plate is the blind end that adds hot-flow flue, is equipped with the gas connection pipe road at the transverse center position of upper and lower blind end, adds hot-flow flue by gas connection pipe road and first, second corresponding admission line connection.

3. tortuous flow doubleeffect heating solar heat-collector air heat collectors according to claim 2 is characterized in that: the outside concave-shaped camber in the position of left-right symmetry center line muscle on the absorber plate.

4. according to claim 1 or 2 or 3 described tortuous flow doubleeffect heating solar heat-collector air heat collectors, it is characterized in that: the absorber plate plate body makes progress and has multilayer gradual change selectivity on the surface of Chaoyang and inhale film.

5. according to claim 1 or 2 or 3 described tortuous flow doubleeffect heating solar heat-collector air heat collectors, it is characterized in that: described thermal-collecting tube comprises glass tube and is sleeved on the interior endothermic tube of glass tube, the open at both ends of endothermic tube, the corresponding end of also stretching out glass tube respectively, be vacuum interlayer between endothermic tube and the glass tube, the surface of endothermic tube has coating for selective absorption; The two ends that thermal-collecting tube stretches out by endothermic tube are inserted on outlet pipe and the lower supporter, and thermal-collecting tube is communicated with second admission line in outlet pipe, the lower supporter by endothermic tube.

6. tortuous flow doubleeffect heating solar heat-collector air heat collectors according to claim 5 is characterized in that: described endothermic tube is copper pipe or stainless steel tube.

7. tortuous flow doubleeffect heating solar heat-collector air heat collectors according to claim 6 is characterized in that: described glass tube is the high-boron-silicon glass pipe.

8. tortuous flow doubleeffect heating solar heat-collector air heat collectors according to claim 7 is characterized in that: the connecting portion of thermal-collecting tube and outlet pipe and lower supporter seals by seal.

9. according to claim 1 or 2 or 3 described tortuous flow doubleeffect heating solar heat-collector air heat collectors, it is characterized in that: the outlet of described outlet pipe is provided with the pump housing.

10. tortuous flow doubleeffect heating solar heat-collector air heat collectors according to claim 8 is characterized in that: the outlet of described outlet pipe is equipped with the pump housing; Have multilayer gradual change selectivity on the outer surface of described absorber plate plate body and inhale film.

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