A solar collector based on vacuum tube array and working method

Abstract

The present invention discloses a solar collector based on a vacuum tube array, comprising a plurality of solar heat collecting tubes distributed in an oblique equidistant array; an arc reflector plate with a semicircular arc cross section is coaxially arranged outside each solar heat collecting tube, and a driving device can drive each arc reflector plate to rotate around the solar heat collecting tube along the axis; tooth-shaped protrusions are distributed in an equidistant array on the contour edge of each arc reflector plate; an arc-shaped focusing reflector plate is used to enhance the heat collection efficiency of the solar heat collecting tube and solve the problem of rainwater filtering.

Description

Technical Field

[0001] The invention belongs to the field of solar thermal collectors. Background Art

[0002] Solar water heaters generally use array-distributed vacuum heat collecting tubes to receive sunlight radiation. Under each heat collecting tube of the solar water heater, an arc-shaped concave concentrating reflector with the concave surface facing upward is arranged to enhance the heat collection efficiency of the solar heat collecting tube. However, the concave surface of the arc-shaped concentrating reflector is prone to water accumulation on rainy days, and the light collection effect will be poor in the case of water accumulation. At the same time, green moss and mold will grow on the concave reflective surface of the arc-shaped concentrating reflector over time, thereby reducing the radiation reflection efficiency of the reflector.

[0003] At the same time, in addition to carrying large-volume debris such as leaves, rainwater itself is clean enough for use in non-direct drinking occasions such as watering flowers, washing, and cleaning. Therefore, it only needs to filter out large-volume solids in the rainwater and use it directly. This solution can also solve the problem of rainwater filtration. Summary of the invention

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a solar collector and a working method based on a vacuum tube array, which uses an arc-shaped focusing reflector to enhance the heat collection efficiency of the solar collector tube and solve the problem of rainwater filtering.

[0005] Technical solution: To achieve the above-mentioned purpose, a solar collector based on a vacuum tube array of the present invention comprises a plurality of solar collector tubes distributed in an oblique equidistant array; an arc reflector plate with a semicircular cross-section is coaxially arranged outside each solar collector tube, and a driving device can drive each arc reflector plate to rotate around the solar collector tube along the axis; tooth-like protrusions are distributed in an equidistant array on the contour edge of each arc reflector plate.

[0006] Further, any two adjacent arc reflection plates are respectively recorded as the first arc reflection plate and the second arc reflection plate, and the contour edges on the first arc reflection plate and the second arc reflection plate are respectively recorded as the first contour edge and the second contour edge;

[0007] The first circular arc reflector plate and the second circular arc reflector plate rotate along their respective axes. When the first contour edge and the second contour edge reach the closest position, a number of tooth-like protrusions on the first contour edge of the first circular arc reflector plate and the second circular arc reflector plate approach each other and a number of tooth-like protrusions on the second contour edge engage with each other, and an array of rainwater filtering pores are formed at the engaging gaps where the tooth-like protrusions engage with each other.

[0008] Furthermore, the concave surface of the arc reflective plate has a reflective coating, and the solar collector tube includes a vacuum outer tube and a collector inner tube. When each arc reflective plate rotates around the axis to the bottom of each solar collector tube, the sunlight reflected by the concave reflective coating of the arc reflective plate is concentrated on the collector inner tube of the solar collector tube.

[0009] Furthermore, when each arc reflective plate rotates around the axis to above each solar collector tube, the convex surface of the arc reflective plate faces upward, and a water collecting ditch is formed between two adjacent arc reflective plates with the convex surface facing upward, and an array of rainwater filtering pores are formed at the bottom of each water collecting ditch.

[0010] Furthermore, an inclined rainwater guide plate is arranged below several solar collector tubes of the oblique array, and a rainwater recovery box is arranged at the lower end of the guide slope of the rainwater guide plate. The rainwater recovery box contains a rainwater collecting chamber, and water can flow downward along the rainwater guide plate into the rainwater collecting chamber.

[0011] Furthermore, the ends of each arc reflector are coaxially fixedly connected with a gear, and the gear is coaxially provided with a through-hole, which can be rotatably sleeved outside the solar collector tube, and the gears at the ends of any two adjacent arc reflectors are meshed with each other.

[0012] Furthermore, it comprises a state switching motor, the output end of which is drivingly connected to an output gear, and the output gear meshes with a gear at the end of any arc reflection plate.

[0013] Further, a working method of a solar collector based on a vacuum tube array:

[0014] On sunny days, the sunlight reflected by the reflective coating on the concave surface of each arc reflector is concentrated on the inner tube of the solar collector.

[0015] On rainy days, each arc reflector rotates around the axis to above each solar collector tube, and a water collecting ditch is formed between each adjacent arc reflector with the convex surface facing upward. The tooth-like protrusions on the contour edge of the side close to each other of any two adjacent arc reflectors bite each other, and the bite gaps where the tooth-like protrusions bite each other form an array of rainwater filtering pores, so that the bottom of each water collecting ditch is formed with an array of rainwater filtering pores; the rainwater in the water collecting ditch is filtered by the array of rainwater filtering pores at the bottom of the ditch and then leaks down to the rainwater guide plate, and the rainwater filtered by the rainwater filtering pores flows downward along the guide plate into the rainwater concentration cavity, and finally the rainwater in the rainwater concentration cavity is discharged through the centralized guide outlet and collected in the rainwater storage tank.

[0016] Beneficial effect: In rainy days, the convex surface of each arc reflective plate of the present invention faces upward, and the concave surface of each arc reflective plate with a reflective coating faces downward, so as to avoid the problem that rainwater accumulates on the concave surface of each arc reflective plate with a reflective coating and moss and mold grow. A water collecting ditch is formed between two adjacent arc reflective plates with convex surfaces facing upward. When rainwater falls on the convex surface of each arc reflective plate, it flows downward into each water collecting ditch along the convex surface of the arc reflective plate, so that the rainwater in each water collecting ditch is gathered. In this state, the tooth-like protrusions on the contour edge of any two adjacent arc reflective plates close to each other are engaged with each other. , an array of rainwater filtering pores is formed at the interlocking gaps of the tooth-like protrusions, so that an array of rainwater filtering pores is formed at the bottom of each water-gathering ditch; the rainwater in the water-gathering ditch is filtered by the array of rainwater filtering pores at the bottom of the ditch and then leaks down to the rainwater guide plate, thereby achieving the purpose of filtering out large-volume debris such as leaves, and the rainwater filtered by the rainwater filtering pores flows downward along the guide plate into the rainwater concentration cavity, thereby achieving the function of filtering, collecting and storing rainwater, and the rainwater can be taken through the concentrated outlet of the filtered rainwater for non-direct drinking occasions such as watering flowers, washing, and cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 It is a schematic diagram of the overall structure of the collector;

[0018] Attached Figure 2 It is the overall cross-sectional view of the collector;

[0019] Attached Figure 3 This is a schematic diagram of switching between sunny and rainy days;

[0020] Attached Figure 4 It is a schematic diagram of the structure of a single arc reflector;

[0021] Attached Figure 5 This is a schematic diagram of the coordination of two arc reflectors. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] As attached Figures 1 to 5 A solar collector based on a vacuum tube array is shown, such as Figure 1 and 2 As shown, it includes a plurality of solar heat collecting tubes 5 distributed in an oblique equidistant array, and both ends of each solar heat collecting tube 5 are fixed on a heater bracket 10; each of the solar heat collecting tubes 5 is coaxially provided with an arc reflector 4 with a semicircular cross section, and a driving device can drive each arc reflector 4 to rotate around the solar heat collecting tube 5 along the axis, as shown in FIG. Figure 4As shown, tooth-shaped protrusions 11 are distributed in an equidistant array on the contour edge 4.1 of each arc reflection plate 4; any two adjacent arc reflection plates 4 are respectively recorded as the first arc reflection plate 4a and the second arc reflection plate 4b, and the contour edges 4.1 on the first arc reflection plate 4a and the second arc reflection plate 4b are respectively recorded as the first contour edge 4.1a and the second contour edge 4.1b; the first arc reflection plate 4a and the second arc reflection plate 4b rotate along their respective axes, and when the first contour edge 4.1a and the second contour edge 4.1b reach the closest position, a number of tooth-shaped protrusions 11 on the first contour edge 4.1a on the side where the first arc reflection plate 4a and the second arc reflection plate 4b are close to each other engage with a number of tooth-shaped protrusions 11 on the second contour edge 4.1b, as shown in FIG. Figure 5 As shown, the interlocking gaps of the tooth-like protrusions 11 are interlocked to form an array of rainwater filtering pores 12, and this structure will be described in detail in the specific working scenario on rainy days later.

[0024] The concave surface 3 of the arc reflective plate 4 has a reflective coating, and the solar heat collecting tube 5 is composed of a vacuum outer tube 5.1 and a heat collecting inner tube 5.2; when each arc reflective plate 4 rotates around the axis to the bottom of each solar heat collecting tube 5, the sunlight reflected by the reflective coating on the concave surface 3 of the arc reflective plate 4 is concentrated on the heat collecting inner tube 5.2 of the solar heat collecting tube 5; thereby enhancing the heat collecting efficiency of the solar heat collecting tube 5

[0025] When each arc reflective plate 4 rotates around the axis to the top of each solar energy collecting tube 5, the convex surface of the arc reflective plate 4 faces upward, and a water collecting ditch 13 is formed between two adjacent arc reflective plates 4 with the convex surfaces facing upward, and the rainwater filtering pores 12 distributed in an array are formed at the bottom 14 of the water collecting ditch 13; in this state, the tooth-like protrusions 11 on the contour edge 4.1 on the side close to each other of any two adjacent arc reflective plates 4 bite each other, and the rainwater filtering pores 12 distributed in an array are formed at the bite gaps where the tooth-like protrusions 11 bite each other, so that the rainwater filtering pores 12 distributed in an array are formed at the bottom 14 of each water collecting ditch 13; the rainwater in the water collecting ditch 13 is filtered by the rainwater filtering pores 12 distributed in an array at the bottom 14 of the ditch, and then leaks down to the rainwater guide plate 17 below.

[0026] An inclined rainwater guide plate 17 is provided below the plurality of solar heat collecting tubes 5 of the oblique array, and a rainwater recovery box 8 is provided at the lower end of the guide slope of the rainwater guide plate 17. The rainwater recovery box 8 contains a rainwater concentration chamber 16, and rainwater can flow downward along the rainwater guide plate 17 into the rainwater concentration chamber 16; a filtered rainwater concentration outlet 9 is provided on one side of the rainwater concentration chamber 16;

[0027] The ends of the arc reflective plates 4 are coaxially fixedly connected with a gear 7, and the gear 7 is coaxially provided with a sleeve 6 penetrating therethrough, and the sleeve 6 can be rotated to be sleeved outside the solar heat collecting tube 5, and the gears 7 at the ends of any two adjacent arc reflective plates 4 are meshed with each other;

[0028] It also includes a state switching motor 1 fixed on the heater bracket 10, the output end of the state switching motor 1 is drivingly connected to an output gear 2, and the output gear 2 is meshed with a gear 7 at the end of any one of the arc reflection plates 4;

[0029] Working principle:

[0030] Sunny weather conditions:

[0031] On sunny days, it is necessary to switch to the sunny state, control the state switching motor 1, and under the gear meshing transmission, make each arc reflective plate 4 rotate around its own axis to the bottom of each solar heat collecting tube 5, and the sunlight reflected by the reflective coating of the concave surface 3 of each arc reflective plate 4 is concentrated on the heat collecting inner tube 5.2 of the solar heat collecting tube 5, thereby enhancing the heat collecting efficiency of the solar heat collecting tube 5;

[0032] like Figure 3 As shown, on rainy days, in order to prevent the concave surface 3 of the arc reflective plate 4 from collecting rainwater, which makes it impossible to collect sunlight on sunny days, and taking into account the filtration of rainwater resources during recycling, it is necessary to switch from the sunny state to the rainy state, and control the state switching motor 1. Under the gear meshing transmission, each arc reflective plate 4 is rotated 180° around the axis to the top of each solar collector tube 5, so that the convex surface of each arc reflective plate 4 faces upward, and the concave surface 3 of each arc reflective plate 4 with a reflective coating faces downward, so as to avoid the concave surface 3 of each arc reflective plate 4 with a reflective coating accumulating rainwater and growing moss and mold. The structure with the convex surface facing upward avoids the problems of rainwater retention and surface accumulation, and a water collecting ditch 13 is formed between each adjacent arc reflective plate 4 with the convex surface facing upward. When rainwater falls on the convex surface of each arc reflective plate 4, it will flow downward into each water collecting ditch along the convex surface of the arc reflective plate 4 13, so that the rainwater in each water-collecting ditch 13 is gathered; in this state, the tooth-like protrusions 11 on the contour edge 4.1 on the side close to each other of any two adjacent arc reflective plates 4 bite each other, and the bite gaps of the tooth-like protrusions 11 bite each other form an array of rainwater filtering pores 12, so that the bottom 14 of each water-collecting ditch 13 is formed with an array of rainwater filtering pores 12; the rainwater in the water-collecting ditch 13 is filtered by the array of rainwater filtering pores 12 at the bottom 14 of the ditch and then leaks down to the rainwater guide plate 17, and the rainwater filtered by the rainwater filtering pores 12 flows downward along the guide plate 19 into the rainwater collecting cavity 16, and finally the rainwater in the rainwater collecting cavity 16 is discharged through the centralized guide outlet 9 and collected in the rainwater storage tank, thereby realizing the function of filtering, collecting and storing rainwater, and it can be directly taken in non-direct drinking occasions such as watering flowers, washing, and cleaning.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A solar collector based on a vacuum tube array, characterized in that: The invention comprises a plurality of solar heat collecting tubes (5) which are arranged in an array at equal intervals along an oblique direction; each of the solar heat collecting tubes (5) is coaxially provided with an arc reflection plate (4) with a cross section of a semicircular arc, and a driving device can drive each arc reflection plate (4) to rotate around the solar heat collecting tube (5) along the axis; and tooth-shaped protrusions (11) are arranged in an array at equal intervals on the contour edge (4.1) of each arc reflection plate (4); Any two adjacent arc reflection plates (4) are respectively recorded as a first arc reflection plate (4a) and a second arc reflection plate (4b), and the contour edges (4.1) on the first arc reflection plate (4a) and the second arc reflection plate (4b) are respectively recorded as a first contour edge (4.1a) and a second contour edge (4.1b); The first circular arc reflection plate (4a) and the second circular arc reflection plate (4b) rotate along their respective axes, and when the first contour edge (4.1a) and the second contour edge (4.1b) reach the closest position, a plurality of tooth-shaped protrusions (11) on the first contour edge (4.1a) and the second circular arc reflection plate (4b) on the side where the first circular arc reflection plate (4a) and the second circular arc reflection plate (4b) are close to each other are engaged with a plurality of tooth-shaped protrusions (11) on the second contour edge (4.1b), and an array of rainwater filtering pores (12) are formed at the interlocking gaps where the tooth-shaped protrusions (11) are engaged with each other; The concave surface (3) of the arc reflective plate (4) has a reflective coating, and the solar heat collecting tube (5) comprises a vacuum outer tube (5.1) and a heat collecting inner tube (5.2); when each arc reflective plate (4) rotates around an axis to below each solar heat collecting tube (5), sunlight reflected by the reflective coating on the concave surface (3) of the arc reflective plate (4) is gathered on the heat collecting inner tube (5.2) of the solar heat collecting tube (5).

2. A solar collector based on a vacuum tube array according to claim 1, characterized in that: When each circular arc reflection plate (4) rotates around the axis to the top of each solar heat collecting tube (5), the convex surface of the circular arc reflection plate (4) faces upward, a water collecting ditch (13) is formed between two adjacent circular arc reflection plates (4) with the convex surface facing upward, and the rainwater filtering pores (12) distributed in an array are formed at the bottom (14) of each water collecting ditch (13).

3. A solar collector based on a vacuum tube array according to claim 2, characterized in that: An inclined rainwater guide plate (17) is arranged below a plurality of solar heat collecting tubes (5) of the oblique array, a rainwater recovery box (8) is arranged at the lower end of the guide slope of the rainwater guide plate (17), and a rainwater collection chamber (16) is arranged inside the rainwater collection chamber (8), and water can flow downward along the rainwater guide plate (17) into the rainwater collection chamber (16).

4. A solar collector based on a vacuum tube array according to claim 3, characterized in that: The ends of the arc reflective plates (4) are coaxially fixedly connected with a gear (7), the gear (7) is coaxially provided with a sleeve (6) penetrating therethrough, the sleeve (6) can be rotatably sleeved outside the solar heat collecting tube (5), and the gears (7) at the ends of any two adjacent arc reflective plates (4) are meshed with each other.

5. A solar collector based on a vacuum tube array according to claim 4, characterized in that: It comprises a state switching motor (1), wherein the output end of the state switching motor (1) is drivingly connected to an output gear (2), and the output gear (2) meshes with a gear (7) at the end of any one of the arc reflection plates (4).

6. The working method of a solar collector based on a vacuum tube array according to claim 5, characterized in that: On sunny days, sunlight reflected by the reflective coating on the concave surface (3) of each arc reflective plate (4) is concentrated on the heat collecting inner tube (5.2) of the solar heat collecting tube (5); On rainy days, each arc reflector (4) rotates 180° around the axis to the top of each solar heat collecting tube (5), and a water collecting ditch (13) is formed between each adjacent arc reflector (4) with the convex surface facing upward. Each tooth-shaped protrusion (11) on the contour edge (4.1) of any adjacent arc reflector (4) on the side close to each other is engaged with each other, and the interlocking gaps of the tooth-shaped protrusions (11) are formed with array-distributed rainwater filtering pores (12), so that each water collecting ditch (13) ) are formed with array-distributed rainwater filtering pores (12) at the bottom (14) of the ditch; rainwater in the water collecting ditch (13) is filtered by the array-distributed rainwater filtering pores (12) at the bottom (14) of the ditch and then flows down to the rainwater guide plate (17); rainwater filtered by the rainwater filtering pores (12) flows downward along the guide plate (19) into the rainwater collecting chamber (16); finally, rainwater in the rainwater collecting chamber (16) is discharged through the centralized outlet (9) and collected in the rainwater storage tank.

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