Solar heat collector heat exchange system with air circulation heating function

Abstract

The utility model discloses a solar heat collector heat exchange system with air circulation heating, which belongs to the technical field of solar heat collection and comprises a straight-through type solar tube, two ends of the straight-through type solar tube are communicated through an air delivery tube, the air delivery tube is provided with a heat exchanger and a fan, the fan pushes air circulation heating, and the air circulation heating is achieved. And the heat exchanger transfers heat in the hot air to other media. The solar heat collector heat exchange system is researched and developed based on the practical application of the solar heat collector, and through air circulation heating, the solar heat collector heat exchange system with the air circulation heating function has the low maintenance rate and use cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of solar energy heat collection, and particularly relates to a solar energy heat collector heat exchange system for air circulation heating. Background Art

[0002] Solar collectors include vacuum tubes and flat plates, etc., and generally use water or antifreeze as the circulating medium for circulating heat exchange. The advantage is high heat transfer efficiency, but the disadvantage is that they are easily frozen and cracked in winter, and there is natural consumption, which requires regular replenishment. When there is a sudden power outage, the liquid in the collector will instantly vaporize, which can easily cause the vacuum tube to rupture. In order to solve the above problems, we propose a solar collector heat exchange system with air circulation heating. Utility Model Content

[0003] The utility model aims to provide a solar collector heat exchange system for air circulation heating, aiming to solve the problems existing in the prior art in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A solar collector heat exchange system for air circulation heating includes a straight-through solar tube, both ends of which are connected by an air pipe, the air pipe is provided with a heat exchanger and a fan, the fan drives the air circulation heating, and the heat exchanger transfers the heat in the hot air to other media.

[0006] Furthermore, the fan is arranged at the rear side of the heat exchanger in the air flow direction.

[0007] Furthermore, the straight-through solar tubes are arranged in multiple groups, a first connector is arranged at one end of the multiple groups of straight-through solar tubes, and a second connector is arranged at the other end, the first connector and the second connector respectively have air flow channels for connecting the multiple groups of straight-through solar tubes, and the first connector and the second connector are connected through an air pipe.

[0008] Furthermore, the heat exchanger is provided with an inner cavity, in which a heat exchange tube is arranged, and both ends of the heat exchange tube pass through the heat exchanger for connecting to an external pipeline for conveying the medium to be heated. The heat exchange tube located in the inner cavity is provided with fins for absorbing heat, and the fins are in the same direction as the airflow direction.

[0009] Furthermore, the heat exchange tube extends along an S-shaped path in the direction of the inner cavity airflow.

[0010] Furthermore, the straight-through solar tube has a light-transmitting inner wall and outer wall, the inner wall and the outer wall enclose a vacuum cavity, and the inner wall is provided with a heat-absorbing layer.

[0011] Furthermore, the heat exchanger is connected to the water tank via a water pipe, and the water pipe is provided with a water pump.

[0012] Compared with the shortcomings and deficiencies of the prior art, the utility model has the following beneficial effects.

[0013] 1. The utility model provides a solar collector heat exchange system with air circulation heating, which heats the air through a straight-through solar tube, and a fan drives the air circulation heating, and the hot air transfers the heat to other media through the heat exchanger. Compared with the existing solar collectors, the solar collector heat exchange system with air circulation heating has no natural loss during use, which is conducive to reducing the cost of use. Secondly, it has a wide applicable temperature range. Due to the high fluidity and low density of air, the risk of the straight-through solar tube breaking under low temperature conditions is relatively small. Finally, the emergency power outage has little impact on the solar collector heat exchange system with air circulation heating, which is conducive to reducing the maintenance rate during use.

[0014] 2. The fan is arranged at the rear side of the heat exchanger in the airflow direction, which is beneficial to prevent hot air from damaging the fan; the inner sleeve of the heat exchanger is arranged on the heat exchange tube, and fins are arranged inside the heat exchange tube, which is beneficial to improve the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the connection relationship of the embodiment of the utility model.

[0016] Figure 2 It is a schematic diagram of the internal structure of the straight-through solar tube in the utility model.

[0017] Figure 3 yes Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0018] Figure 4 It is a schematic diagram of the internal structure of the heat exchanger in the utility model.

[0019] In the figure: 1-straight-through solar tube; 2-air pipe; 3-heat exchanger; 4-fan; 5-water pipe; 6-water pump; 7-water tank; 8-first end; 9-second end; 10-inner tube; 11-heat absorption layer; 12-expansion mechanism; 13-inner cavity; 14-heat exchange tube; 15-fin; 16-first connecting piece; 17-second connecting piece; 18-vacuum chamber. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] Reference Figure 1 and Figure 2A solar collector heat exchange system for air circulation heating includes a straight-through solar tube 1, which has a first end 8 and a second end 9 that are connected. The first end 8 and the second end 9 are connected through an air pipeline 2. The air pipeline 2 is provided with a heat exchanger 3 and a fan 4. The fan 4 is used to promote air flow to achieve circulation heating. The heat exchanger 3 is used to introduce heat in the hot air into a medium to be heated. The medium to be heated is introduced into the heat exchanger 3 through a pipeline and then is heated and then discharged through the pipeline. The medium to be heated can be water.

[0022] Reference Figure 2 and Figure 3 The straight-through solar tube 1 has a light-transmissive outer wall and an inner wall, and a vacuum chamber 18 is formed between the inner wall and the outer wall. The vacuum chamber 18 can effectively insulate and keep warm. The inner side of the inner wall is the inner tube 10, and a heat absorption layer 11 is arranged on the inner wall. The heat absorption layer 11 absorbs heat and heats the air in the inner tube 10. The heated air is discharged along the first end 8, and the air after heat exchange and cooling is circulated to the second end 9 and introduced into the inner tube 10 for circulation heating.

[0023] Arranging multiple groups of straight-through solar tubes 1 is beneficial to improving the heat absorption. A first connector 16 is arranged at the first end 8 of the multiple groups of straight-through solar tubes 1. A first air flow channel is arranged in the first connector 16, and the first air flow channel is connected with the multiple groups of straight-through solar tubes 1 through the first air flow channel. A second connector 17 is arranged at the second end 9 of the multiple groups of straight-through solar tubes 1. A second air flow channel is arranged in the second connector 17. One end of the air supply pipe 2 is connected to the first connector 16, and the other end is connected to the second connector 17.

[0024] Reference Figure 3 The straight-through solar tube 1 is provided with an expansion mechanism 12 for buffering the heat absorption and expansion of the gas. Specifically, the expansion mechanism 12 is a spiral tube, which is arranged at one end of the inner tube 10. One end of the spiral tube is connected to the second end 9, and the other end is connected to the inner tube 10. The expansion mechanism 12 is beneficial to reducing the risk of rupture of the straight-through solar tube 1.

[0025] Reference Figure 4 The heat exchanger 3 has an inner cavity 13, and a heat exchange tube 14 is passed through the inner cavity 13. The heat exchange tube 14 is introduced along the lower part of the side wall of the heat exchanger 1, extends along the vertical S-shaped path in the inner cavity 13, and is led out along the upper part of the side wall of the heat exchanger 3. Both ends of the heat exchange tube 14 pass through the heat exchanger 3 and are provided with joints for connecting to the external pipeline for conveying the medium to be heated. Fins 15 are vertically arranged on the outer surface of the heat exchange tube 14 located in the inner cavity 13. The size of the fins 15 is adapted to the inner cavity 13. Multiple groups of fins 15 are evenly arranged in the inner cavity 13. The top and bottom of the heat exchanger 3 are respectively provided with an air inlet and an air outlet for connecting the gas transmission pipe 2. The hot air is introduced into the inner cavity 13 along the top of the heat exchanger 3, and is fully contacted with the fins 15 for heat exchange and then led out along the air outlet. After the fins 15 absorb heat, the heat is transferred to the medium in the heat exchange tube 14 through the heat exchange tube 14, thereby completing the heat exchange.

[0026] The fan 4 is arranged at the rear side of the heat exchanger 3 in the gas flow direction. The heat exchanger 3 absorbs the heat in the gas, which is beneficial to avoid the overheated airflow from damaging the fan 4. The fan 4 pushes the airflow after heat exchange and cooling along the gas transmission pipe 2 to the straight-through solar tube 1, so that the airflow circulates and heats.

[0027] The specific implementation modes of the present invention are further described below in conjunction with the embodiments, but the present invention is not limited to the scope of the embodiments. Example

[0028] The first ends 8 of the plurality of straight-through solar tubes 1 are connected via a first connector 16, and the second ends 9 are connected via a second connector 17. The first connector 16 and the second connector 17 are connected via an air pipe 2, and a heat exchanger 3 and a fan 4 are respectively disposed on the air pipe 2. The heat exchanger 3 is connected to a water tank 7 via a water pipe 5, and the water pipe 5 is provided with a water pump 6.

[0029] The straight-through solar tube 1 absorbs heat and heats the air in the inner tube 10, the fan 4 drives the gas in the gas pipe 2 to flow, the heated air enters the heat exchanger 3 along the gas pipe 2, the water pump 6 introduces the water in the water tank 7 into the heat exchanger 3 through the water pipe 5, the heat exchanger 3 transfers the heat in the air flow to the water flow, the air flow after heat exchange and cooling flows to the straight-through solar tube 1 through the fan 4 for circulation heating, and the heated water flow is transported to the water tank 7 through the water pipe 5.

[0030] The solar collector heat exchange system for air circulation heating utilizes solar energy to heat the air. The hot air transfers heat to other media through the heat exchanger 3. The hot air is cooled by heat exchange and then circulated for heating. Compared with media such as water or antifreeze, there is no problem of natural loss of the medium during the use of air circulation heating, and the temperature application range is wide. Since air is highly fluid and has a low density, the expansion of air will not cause obvious pressure changes on objects. It can be used normally at low temperatures and can effectively cope with problems such as sudden power outages, which is conducive to reducing the maintenance rate and cost during use.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A solar collector heat exchange system for air circulation heating, characterized in that: It comprises a straight-through solar tube (1), wherein two ends of the straight-through solar tube (1) are connected via an air delivery pipe (2), the air delivery pipe (2) is provided with a heat exchanger (3) and a fan (4), the fan (4) drives air circulation for heating, and the heat exchanger (3) transfers heat in the hot air to water; The heat exchanger (3) is provided with an inner cavity (13), and a heat exchange tube (14) is arranged in the inner cavity (13). Both ends of the heat exchange tube (14) pass through the heat exchanger (3) and are used to connect to an external pipeline for conveying a medium to be heated. The heat exchange tube (14) located in the inner cavity (13) is provided with fins (15) for absorbing heat, and the fins (15) are in the same direction as the airflow direction.

2. The solar collector heat exchange system for air circulation heating according to claim 1, characterized in that: The fan (4) is arranged on the rear side of the heat exchanger (3) in the air flow direction.

3. The solar collector heat exchange system for air circulation heating according to claim 1, characterized in that: The straight-through solar tubes (1) are provided in a plurality of groups, one end of each of the plurality of straight-through solar tubes (1) is provided with a first connecting piece (16), and the other end of each of the plurality of straight-through solar tubes (1) is provided with a second connecting piece (17), the first connecting piece (16) and the second connecting piece (17) respectively having an air flow channel for connecting the plurality of straight-through solar tubes (1), and the first connecting piece (16) and the second connecting piece (17) are connected via an air transmission pipe.

4. The air circulation heating solar collector heat exchange system according to claim 1, characterized in that: The heat exchange tube (14) extends along an S-shaped path in the direction of the inner cavity airflow.

5. The solar collector heat exchange system for air circulation heating according to claim 1, characterized in that: The straight-through solar tube (1) has a light-transmitting inner wall and an outer wall, the inner wall and the outer wall enclose a vacuum cavity (18), and the inner wall is provided with a heat-absorbing layer (11).

6. The solar collector heat exchange system for air circulation heating according to claim 1, characterized in that: The heat exchanger (3) is connected to a water tank (7) via a water pipe (5), and the water pipe (5) is provided with a water pump (6).

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