Air type heat exchange header

Abstract

The utility model relates to the technical field of photo-thermal heating, and discloses an air type heat exchange header which comprises a copper pipe fin type heat exchanger, the copper pipe fin type heat exchanger is installed in a header shell, and air pipe connectors used for being connected with heat preservation air pipes are formed in the two end faces of the header shell. A plurality of round holes allowing heat collecting pipes to be inserted are formed in the side wall of the header shell at equal intervals, the copper pipe fin heat exchanger comprises a U-shaped heat exchange copper pipe, the two open ends of the U-shaped heat exchange copper pipe extend out of the header shell, a plurality of C-shaped aluminum fins are evenly distributed and fixed on the U-shaped heat exchange copper pipe, and the C-shaped aluminum fins are arranged in the U-shaped heat exchange copper pipe. The C-shaped openings in all the C-shaped aluminum fins are consistent in direction, and a ventilation channel is defined by the C-shaped openings and the inner wall of the header shell. Through the application of the air type photo-thermal heating system, a traditional air type photo-thermal heating system does not need to be independently provided with an air-water heat exchanger, the system structure is simplified, the system cost is reduced, meanwhile, the circulating air volume of the system can be greatly reduced, and the air type photo-thermal heating system has very high practical value.

Description

Technical Field

[0001] This utility model relates to the field of solar thermal heating technology, and in particular to an air-type heat exchange manifold. Background Technology

[0002] Solar thermal heating is highly valuable for widespread adoption due to its high heat conversion efficiency and low operating costs. Currently, air-based solar thermal systems typically consist of a collector (composed of a double-pass vacuum collector tube, headers, and support structure), insulated ductwork, a water-air heat exchanger (which transfers heat from the air to the water for storage and use), a circulating fan, a hot water pump (which drives the water circulation between the water-air heat exchanger and the water tank), and a control system. When sunlight shines on the double-pass vacuum collector tube, the air inside is heated and flows upwards along the tube driven by the circulating fan. It then converges in the upper header, flows horizontally out, enters the water-air heat exchanger through the insulated duct, and finally returns to the lower header through the insulated duct, circulating back into the double-pass vacuum collector tube for repeated heating. During this process, the air circulation is driven by a fan on the insulated ductwork.

[0003] In the aforementioned solar thermal system, the air-water heat exchanger is connected in series with a circulating fan on an insulated duct. The heated air must first exit the header before entering the air-water heat exchanger for heat exchange. This leads to the following problems: First, to drive all the heated air out of the header, the circulating fan must have a sufficiently large airflow, requiring high power, resulting in high fan cost and power consumption. Second, the air-water heat exchanger requires a separate insulated enclosure, increasing manufacturing and transportation costs. Third, the large airflow of the circulating fan and the large diameter of the insulated duct contribute to high manufacturing, transportation, and installation costs, and also require significant space. These issues hinder the widespread adoption of air-type solar thermal collectors and urgently require improvement. Utility Model Content

[0004] The purpose of this invention is to provide an air-type heat exchange manifold to solve the problems and defects existing in the above-mentioned background technology.

[0005] To achieve the above objectives, the following technical solution is provided:

[0006] An air-type heat exchange manifold includes a copper tube finned heat exchanger installed inside the manifold housing. Duct interfaces for connecting insulated ducts are provided on both ends of the manifold housing. A plurality of evenly spaced circular holes for inserting heat collection tubes are provided on the side wall of the manifold housing. The copper tube finned heat exchanger includes a U-shaped heat exchange copper tube, with its two open ends extending from the manifold housing. A plurality of C-shaped aluminum fins are evenly distributed and fixed on the U-shaped heat exchange copper tube. The C-shaped openings on all the C-shaped aluminum fins face the same direction and enclose the inner wall of the manifold housing to form a ventilation channel.

[0007] Furthermore, the circular holes on the side wall of the header housing are opened in the direction of the C-shaped opening of the C-shaped aluminum fins. The C-shaped opening of the C-shaped aluminum fins and the inner wall of the header housing form a ventilation channel. The heat collection tube is inserted into the header housing, and the inner cavity of the heat collection tube is connected to the ventilation duct in the air-type heat exchange header for the circulation of hot air to achieve heat exchange.

[0008] Furthermore, the header housing includes an insulated shell and an insulated end cap. The insulated end cap is detachably connected to one end of the insulated shell, and the U-shaped bend of the U-shaped heat exchange copper tube is located at the non-detachable end of the header housing. The design of the end cap of the header housing, and the placement of the U-shaped bend of the U-shaped heat exchange copper tube at the non-detachable end of the header housing, aims to ensure that the copper tube finned heat exchanger can be disassembled and assembled from one side.

[0009] Preferably, the insulation end cap has a T-shaped groove on its assembly contact surface with the insulation shell, and a corresponding T-shaped boss is provided on the mounting end face of the insulation shell. The cooperation of the groove and the boss effectively increases the sealing performance.

[0010] Preferably, an elastic pipe clamp is fixed to the inner side of the non-removable end of the manifold housing, and the U-shaped bend of the U-shaped heat exchange copper pipe is fixed to the elastic pipe clamp.

[0011] Preferably, the two open ends of the U-shaped heat exchange copper tube extend from the bottom surface of the manifold housing. The open ends of the U-shaped heat exchange copper tube being located on the bottom surface of the manifold housing prevent interference between the insulated pipes that connect to it and the insulated ducts that connect to the air-type heat exchange manifold duct interface.

[0012] Preferably, a number of support fins are provided at intervals in the arrangement of the C-shaped aluminum fins. The support fins have the same shape as the C-shaped aluminum fins and the C-shaped opening direction is consistent. The thickness of the support fins is greater than the thickness of the C-shaped aluminum fins. The support fins mainly play a supporting role.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] This invention integrates the upper header and air-water heat exchanger in existing air-type solar thermal systems, reducing the number of components and significantly lowering the system's production cost. Furthermore, in this invention, hot air does not need to be completely extracted from the header; instead, it undergoes on-site heat exchange within the header. This drastically reduces the overall required circulating air volume of the solar collector system, thereby reducing both the power of the circulating fan and the diameter of the air circulation duct, further lowering the initial installation cost. Simultaneously, the circulating fan, a major power-consuming component in air-type solar thermal collector systems, significantly reduces the overall system's energy consumption, to approximately one-third of that in traditional solutions. Attached Figure Description

[0015] Figure 1 This is a front sectional view of the air-type heat exchanger header according to an embodiment of the present invention;

[0016] Figure 2 for Figure 1 BB section view;

[0017] Figure 3 for Figure 1 CC section view;

[0018] Figure 4 for Figure 3 DD cross-sectional view;

[0019] Figure 5 This is a schematic diagram illustrating the application of the air-type heat exchanger header of this utility model;

[0020] Reference numerals: 01. Air heat exchanger header; 02. Heat collector tube; 03. Blower header; 04. Insulated air duct; 1. Copper tube finned heat exchanger; 11. U-shaped heat exchange copper tube; 12. C-shaped aluminum fin; 13. Support fin; 14. Threaded joint; 15. Ventilation channel; 2. Header shell; 21. Insulated shell; 22. Insulated end cap; 23. Air duct interface; 24. Round hole; 25. Flexible pipe clamp; 26. Boss; 27. Groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1 to 4 As shown in the embodiment of this utility model, the heat exchange manifold includes a copper tube finned heat exchanger 1 and a manifold shell 2.

[0023] The core function of the copper tube finned heat exchanger 1 is to exchange heat from hot air into heat transfer oil (or other suitable liquid medium, hereinafter referred to as heat transfer oil). This is consistent with the working principle of conventional copper tube finned heat exchangers. The heat transfer medium in contact between the fins and the outer wall of the copper tube is circulating hot air, while the heat transfer medium inside the copper tube is circulating heat transfer oil. Heat exchange is completed during the circulation of air and heat transfer oil. To meet the functional requirements of this invention, the copper tube finned heat exchanger 1 is designed in a long, narrow shape to facilitate installation within the manifold housing 2.

[0024] The copper tube finned heat exchanger 1 consists of a U-shaped copper heat exchange tube 11, a C-shaped aluminum fin 12, and a support fin 13.

[0025] The U-shaped heat exchange copper tube 11 serves as both a conduit for the heat transfer oil and the skeleton of the entire copper tube finned heat exchanger 1, fixing the C-shaped aluminum fins 12 and supporting the fins 13.

[0026] The C-shaped aluminum fin 12 is generally a C-shaped thin aluminum plate with two holes for the U-shaped heat exchange copper tube 11 to pass through. When assembling the C-shaped aluminum fin 12 and the U-shaped heat exchange copper tube 11, after determining the relative positions of the C-shaped aluminum fin 12 and the U-shaped heat exchange copper tube 11, a tube expander is used to expand the diameter of the U-shaped heat exchange copper tube 11, thereby fixing the two together. The C-shaped opening of a single C-shaped aluminum fin 12 and the side wall of the header housing 2 form a semi-circle. The rows of C-shaped aluminum fins 12 and the side wall of the header housing 2 can form a semi-circular ventilation channel 15, allowing airflow to flow laterally in the header housing 2.

[0027] The shape of the support fin 13 and its fixing method with the U-shaped heat exchange copper tube 11 are completely the same as those of the C-shaped aluminum fin 12. The difference is that the support fin 13 is thicker than the C-shaped aluminum fin 12. The support fin 13 mainly plays a supporting role. The support fin 13 is inserted into the arrangement of the C-shaped aluminum fin 12 at equal intervals, so that the copper tube fin heat exchanger 1 can be positioned and supported in the manifold housing 2. The support fin 13 must be configured at both ends of the arrangement of the C-shaped aluminum fin 12 to ensure that the C-shaped aluminum fin 12 will not be deformed due to impact during the installation of the copper tube fin heat exchanger 1 into the manifold housing 2.

[0028] The two open ends of the U-shaped heat exchange copper tube 11 extend from the bottom surface of the manifold housing 2, and both open ends are welded with threaded joints 14 to facilitate connection with the insulation oil pipe. The reason why the two open ends of the U-shaped heat exchange copper tube 11 do not extend directly from the insulation end cover 22 of the manifold housing 2 is mainly to avoid interference with the external insulation air duct of the manifold housing 2.

[0029] The header housing 2 is a composite insulated shell used to collect hot air flowing from the heat collection pipes and allow the heat of the hot air to be exchanged in the copper tube finned heat exchanger 1. The header housing 2 includes an insulated shell 21, an insulated end cap 22, and a flexible pipe clamp 24. One end of the insulated shell 21 is closed and has a duct interface 23 on its end face, while the other end is open and closed by the detachable insulated end cap 22. The insulated end cap 22 also has a duct interface 23 for connecting an external insulated duct. The insulated end cap 22 has a T-shaped groove 27 on its mounting contact surface with the insulated shell 21, and the insulated shell 21 has a corresponding T-shaped boss 26 on its mounting contact surface with the insulated end cap 22. The cooperation of the groove 27 and the boss 26 effectively increases the sealing performance. An elastic tube clamp 24 is fixed to the inner side of the closed end of the heat insulation shell 21, and the U-shaped bend of the U-shaped heat exchange copper tube 11 is fixed to the elastic tube clamp 24.

[0030] Explanation of the working principle of this utility model:

[0031] like Figure 5 As shown, the air-type heat exchanger manifold 01 of this utility model is installed in an air-type heat collection system. The air-type heat collection system includes a heat collection pipe 02, with both ends of the heat collection pipe 02 inserted into the air-type heat exchanger manifold 01 and the blower manifold 03, respectively. The two ends of the air-type heat exchanger manifold 01 and the blower manifold 03 are connected by two insulated air ducts 04. Sunlight heats the air in the heat collection pipe 02, and the hot air flows upward into the air-type heat exchanger manifold 01. The hot air passes through the fins on the copper tube finned heat exchanger 1 and the U-shaped heat exchange copper tube 11, heating the heat transfer oil in the U-shaped heat exchange copper tube 11, thus completing the heat transfer from the air to the heat transfer oil. The heat transfer oil in the U-shaped heat exchange copper tube 11 circulates through an external insulated oil pipe, thereby ultimately transferring the heat collected in the heat collection pipe to the heat-using stage.

[0032] After the hot air completes heat exchange in the air-type heat exchange manifold 01, its temperature drops. Then it flows laterally along the ventilation channel 15 formed by the C-shaped aluminum fins 12, the support fins 13 and the manifold shell 2, and circulates back to the heat collector tube 02 through the insulated air ducts 04 connected to both ends of the air-type heat exchange manifold 01 to be heated again.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air-type heat exchanger header, characterized in that, The device includes a copper tube finned heat exchanger, which is installed inside a header shell. Both ends of the header shell have duct interfaces for connecting insulated ducts. The sidewall of the header shell has several evenly spaced circular holes for inserting heat-collecting tubes. The copper tube finned heat exchanger includes a U-shaped heat exchange copper tube with two open ends extending from the header shell. Several C-shaped aluminum fins are evenly distributed and fixed on the U-shaped heat exchange copper tube. The C-shaped openings on all the C-shaped aluminum fins face the same direction and form a ventilation channel with the inner wall of the header shell.

2. The air-type heat exchanger header according to claim 1, characterized in that, The circular holes on the side wall of the manifold housing are opened in the direction of the C-shaped opening of the C-shaped aluminum fin.

3. The air-type heat exchanger header according to claim 1, characterized in that, The header housing includes an insulated shell and an insulated end cap. The insulated end cap is detachably connected to one end of the insulated shell, and the U-shaped bend of the U-shaped heat exchange copper tube is located at the non-detachable end of the header housing.

4. The air-type heat exchanger header according to claim 3, characterized in that, The heat-insulating end cap has a T-shaped groove on its assembly contact surface with the heat-insulating shell, and a corresponding T-shaped boss is provided on the mounting end surface of the heat-insulating shell.

5. The air-type heat exchanger header according to claim 4, characterized in that, An elastic pipe clamp is fixed to the inner side of the non-removable end of the manifold shell, and the U-shaped bend of the U-shaped heat exchange copper pipe is fixed to the elastic pipe clamp.

6. The air-type heat exchanger header according to claim 1, characterized in that, The two open ends of the U-shaped heat exchange copper tube extend from the bottom surface of the manifold shell.

7. The air-type heat exchanger header according to claim 1, characterized in that, The C-shaped aluminum fins are arranged with several supporting fins at intervals. The supporting fins have the same shape as the C-shaped aluminum fins and the C-shaped opening direction is consistent. The thickness of the supporting fins is greater than that of the C-shaped aluminum fins, and they mainly serve a supporting function.

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