Groove type multi-curved-surface solar heat collector

Abstract

The utility model relates to the technical field of solar heat collectors, in particular to a groove type multi-curved-surface solar heat collector which comprises a heat collecting groove body, a heat collecting pipe arranged in the heat collecting groove body and a glass sealing plate covering a groove opening of the heat collecting groove body, and the heat collecting pipe comprises an outer pipe, an inner pipe arranged in the outer pipe and a turbulent flow opening formed in the inner pipe. The section of the outer pipe is circular, the inner pipe is spiral, and the section of the inner pipe is pentagram-shaped. According to the design, an imaging type focusing paraboloid is combined with a non-imaging focusing involute surface, the design of a wide receiving angle and efficient energy collection are achieved, the outer tube is a glass tube, the inner tube is a heat conduction metal tube, and a turbulent flow opening in the inner tube is used for guiding air, so that the air between the outer tube and the inner tube is crossed with the air in the inner tube, the turbulent flow effect is achieved, and the energy collection efficiency is improved. And the air is heated more uniformly, and the heat exchange performance is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solar heat collectors, in particular to a trough-type multi-curved surface solar heat collector. Background Art

[0002] Trough solar collectors are widely used in industrial hot water, drying, steam, seawater desalination, centralized heating and cooling, and other fields. Trough solar collectors focus sunlight on the focal line through a heat collecting trough with an arc-shaped focusing mirror, and a heat collecting tube is installed on the focal line. The heat collecting tube absorbs the focused solar radiation energy and heats the fluid in the tube, thereby achieving the purpose of heat collection and heating.

[0003] The heat collection part of the trough solar collector is mainly composed of a heat collection trough and a heat collection tube. Generally, an arc-shaped heat collection trough and a cylindrical heat collection tube are used. Due to the poor focusing effect of the heat collection trough and the low thermal energy conversion efficiency of the heat collection tube, the heating capacity of the collector is low. The heating needs of users can only be met by increasing the number, which greatly increases user costs. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a trough-type multi-curved surface solar collector, which greatly improves the heat collection effect of the heat collection trough and the heat energy conversion rate of the heat collection tube.

[0005] The technical solution adopted by the utility model is to provide a trough-type multi-curved solar collector, including a heat collecting trough body, a heat collecting tube arranged in the heat collecting trough body and a glass sealing plate covering the trough opening of the heat collecting trough body, the heat collecting tube includes an outer tube, an inner tube arranged in the outer tube and a spoiler arranged on the inner tube, the outer tube has a circular cross-section, and the inner tube is spiral and has a five-pointed star cross-section.

[0006] The spoiler port includes a first spoiler port and a second spoiler port, a first guide plate is arranged in the first spoiler port, one end of the first guide plate is fixed to the side of the first spoiler port facing the air outlet end of the heat collecting pipe, and the other end is toward the air inlet end of the heat collecting pipe and inclined inwardly, and a second guide plate is arranged in the second spoiler port, one end of the second guide plate is fixed to the side of the second spoiler port facing the air outlet end of the heat collecting pipe, and the other end is toward the air inlet end of the heat collecting pipe and inclined outwardly.

[0007] The first spoiler opening is located at the front portion of the inner tube, and the second spoiler opening is located at the rear portion of the inner tube.

[0008] The heat collecting trough body includes a parabolic and symmetrically arranged left arc plate and right arc plate, an inverted V-shaped middle plate arranged between the left arc plate and the right arc plate, sealing plates arranged at both ends of the left arc plate, the right arc plate and the middle plate, and mounting pipe holes arranged on the sealing plates. The opposite sides of the left arc plate and the right arc plate are respectively connected to the two side ends of the middle plate, and the heat collecting tubes are inserted and installed in the mounting pipe holes.

[0009] The heat collecting tube corresponds to the middle plate up and down.

[0010] The edge of the notch of the heat collecting tank body is provided with a reinforcing flange bent outward.

[0011] The beneficial effect of the utility model is that it provides a trough-type multi-curved surface solar collector, in which the heat collecting trough body combines the imaging focusing parabola with the non-imaging focusing involute surface to realize a wide receiving angle design, and utilizes an "optical trap" to capture the leaked light between the receiving tube and the reflecting surface again, thereby realizing efficient energy collection; the outer tube is a glass tube, and the inner tube is a heat-conducting metal tube; the vacuum glass tube and the heat transfer medium are separated, and the tube will not burst due to uneven cold and heat; the cross-section of the inner tube is a five-pointed star shape, which increases the heat conduction area; the inner tube is twisted in a spiral shape, which increases the flow distance and flow time of the air in the heat collecting tube, so that the air flow is heated more evenly; the spoiler on the inner tube guides the air, so that the air between the outer tube and the inner tube crosses with the air in the inner tube, which plays a spoiler role, makes the air heated more evenly, and further improves the heat exchange performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0014] Figure 3 It is a structural schematic diagram of the heat collecting tube of the utility model;

[0015] Figure 4 yes Figure 3 A magnified view of middle;

[0016] Figure 5 yes Figure 3 Enlarged view of B.

[0017] In the attached drawings, 1, outer tube, 2, inner tube, 3, first spoiler port, 4, second spoiler port, 5, first guide plate, 6, second guide plate, 7, left arc plate, 8, right arc plate, 9, middle plate, 10, sealing plate, 11, strengthened flange. DETAILED DESCRIPTION

[0018] like Figure 1-5 As shown, the utility model provides a trough-type multi-curved solar collector, comprising a heat collecting trough body, a heat collecting tube arranged in the heat collecting trough body and a glass sealing plate covering the notch of the heat collecting trough body, the heat collecting tube comprising an outer tube 1, an inner tube 2 arranged in the outer tube 1 and a spoiler arranged on the inner tube 2, the outer tube 1 has a circular cross-section, the inner tube 2 is spiral and has a five-pointed star cross-section.

[0019] The heat collecting tank body is a tank body structure, and the inner surface of the heat collecting tank body is a focusing mirror. The heat collecting tube consists of an outer tube 1 and an inner tube 2. The outer tube 1 is a glass tube, and the inner tube 2 is a heat-conducting metal tube. The vacuum glass tube and the heat transfer medium are separated, and the tube will not burst due to uneven cold and heat. The cross-section of the inner tube 2 is a five-pointed star shape, which increases the heat conduction area. The inner tube 2 is twisted in a spiral shape, which increases the flow distance and flow time of the air in the heat collecting tube, making the air flow heated more evenly. The spoiler on the inner tube 2 guides the air, so that the air between the outer tube 1 and the inner tube 2 crosses with the air in the inner tube 2, which plays a spoiler role, makes the air heated more evenly, and further improves the heat exchange performance.

[0020] like Figure 3-5 As shown, the spoiler port includes a first spoiler port 3 and a second spoiler port 4, a first guide plate 5 is arranged in the first spoiler port 3, one end of the first guide plate 5 is fixed to the side of the first spoiler port 3 facing the air outlet end of the heat collecting pipe, and the other end is toward the air inlet end of the heat collecting pipe and inclined inwardly, and a second guide plate 6 is arranged in the second spoiler port 4, one end of the second guide plate 6 is fixed to the side of the second spoiler port 4 facing the air outlet end of the heat collecting pipe, and the other end is toward the air inlet end of the heat collecting pipe and inclined outwardly.

[0021] The first guide plate 5 and the second guide plate 6 further guide the flowing air, so that the air cross-flows multiple times, thereby further improving the heating uniformity and heat exchange efficiency.

[0022] like Figure 3-5 As shown, the first spoiler opening 3 is located at the front portion of the inner tube 2 , and the second spoiler opening 4 is located at the rear portion of the inner tube 2 .

[0023] The air between the outer tube 1 and the inner tube 2 is made to cross the air in the inner tube 2 in an orderly manner, thereby reducing the air flow resistance.

[0024] like Figure 1-2 As shown, the heat collecting trough body includes a parabolic and symmetrically arranged left arc plate 7 and right arc plate 8, an inverted V-shaped middle plate 9 arranged between the left arc plate 7 and the right arc plate 8, a sealing plate 10 arranged at both ends of the left arc plate 7, the right arc plate 8 and the middle plate 9, and a mounting pipe hole arranged on the sealing plate 10, the opposite sides of the left arc plate 7 and the right arc plate 8 are respectively connected to the two side ends of the middle plate 9, and the heat collecting pipes are inserted and installed in the mounting pipe holes.

[0025] The left arc plate 7 and the right arc plate 8 are parabolic shapes arranged opposite to each other, and the middle plate 9 is V-shaped. The left arc plate 7, the right arc plate 8, the middle plate 9 and the two closing plates 10 together form a trough structure. The two ends of the heat collecting tube are fixed on the closing plates 10 and pass through the top of the middle plate 9 in the heat collecting trough, which is the focus position of sunlight. This design combines the imaging focusing parabola with the non-imaging focusing involute surface to achieve a wide receiving angle design; and uses an "optical trap" to capture the leaked light between the receiving tube and the reflecting surface again, thereby achieving efficient energy collection, high concentration ratio, high heat collection temperature, and low heat dissipation, effectively and significantly improving the heat collection performance.

[0026] like Figure 1-2 As shown, the heat collecting tube corresponds to the middle plate 9 up and down.

[0027] The heat collecting tube is installed at the position where the sunlight is focused on the heat collecting trough to improve the heat collecting effect of the collector.

[0028] like Figure 1-2 As shown, a reinforcing flange 11 bent outward is provided on the edge of the notch of the heat collecting tank body.

[0029] The reinforced flange 11 is a flange bent outward. The left arc plate 7, the right arc plate 8, the middle plate 9, the sealing plate 10 and the reinforced flange 11 are an integrated structure with high strength and convenient processing and production. The reinforced flange 11 further improves the strength of the solar collector trough, facilitates transportation and storage, and is not easy to be damaged.

Claims

1. A trough-type multi-curved solar collector, comprising a heat collecting trough body, a heat collecting tube arranged in the heat collecting trough body and a glass sealing plate covering the notch of the heat collecting trough body, characterized in that: The heat collecting tube comprises an outer tube (1), an inner tube (2) arranged inside the outer tube (1), and a spoiler provided on the inner tube (2); the outer tube (1) has a circular cross section, and the inner tube (2) is spiral-shaped and has a five-pointed star cross section.

2. A trough-type multi-curved solar collector according to claim 1, characterized in that: The spoiler port comprises a first spoiler port (3) and a second spoiler port (4); a first guide plate (5) is arranged inside the first spoiler port (3); one end of the first guide plate (5) is fixed to one side of the first spoiler port (3) facing the air outlet end of the heat collecting pipe, and the other end is inclined inwardly towards the air inlet end of the heat collecting pipe; a second guide plate (6) is arranged inside the second spoiler port (4); one end of the second guide plate (6) is fixed to one side of the second spoiler port (4) facing the air outlet end of the heat collecting pipe, and the other end is inclined outwardly towards the air inlet end of the heat collecting pipe.

3. A trough-type multi-curved solar collector according to claim 2, characterized in that: The first spoiler opening (3) is located at the front part of the inner tube (2), and the second spoiler opening (4) is located at the rear part of the inner tube (2).

4. The trough-type multi-curved solar collector according to claim 1, characterized in that: The heat collecting tank body comprises a parabolic and symmetrically arranged left arc plate (7) and right arc plate (8), an inverted V-shaped middle plate (9) arranged between the left arc plate (7) and the right arc plate (8), a sealing plate (10) arranged at both ends of the left arc plate (7), the right arc plate (8) and the middle plate (9), and a mounting pipe hole arranged on the sealing plate (10); the opposite sides of the left arc plate (7) and the right arc plate (8) are respectively connected to the two side ends of the middle plate (9), and the heat collecting pipe is inserted and installed in the mounting pipe hole.

5. A trough-type multi-curved solar collector according to claim 4, characterized in that: The heat collecting tube corresponds to the middle plate (9) up and down.

6. The trough-type multi-curved solar collector according to claim 1, characterized in that: The notch edge of the heat collecting tank body is provided with a reinforcing flange (11) bent outward.

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