A solar water heater

Abstract

The present invention relates to the technical field of solar energy utilization, in particular to a solar water heater. The solar water heater comprises a seat, a water tank and a vacuum tube, wherein the vacuum tube comprises an outer glass tube and an inner glass tube, wherein a glass partition is provided in the middle of the inner glass tube, and the upper end of the inner glass tube extends out of the outer glass tube to form a connecting section, wherein a rotating disk is provided in the connecting section, wherein the rotating disk is provided with a rotating shaft, wherein the rotating disk is provided with a rotating through hole, wherein a transparent sleeve is provided in the outer glass tube, wherein the transparent sleeve is provided with a reflective layer; wherein a connecting structure is provided between the transparent sleeve and the rotating disk; wherein the rotating disk drives the transparent sleeve to rotate and the two rotate in accordance with each other; wherein the rotating disk is provided with an inner friction section, wherein the inner glass tube is provided with an outer friction section, and when the inner friction section contacts the outer friction section, there is friction between the rotating disk and the inner glass tube, and both the inner friction section and the outer friction section are arc-shaped surfaces. The present invention provides a rotating disk and a connecting structure, so that the rotating disk can drive the transparent sleeve to rotate, and the overall structure is simple, and there is no need to install a light sensing unit, thereby saving costs.

Description

Technical Field

[0001] The invention relates to the technical field of solar energy utilization, in particular to a solar water heater. Background Art

[0002] With the development of society, people pay more and more attention to the development and utilization of solar energy. At present, many families in rural areas use solar water heaters. Due to the influence of the angle of sunlight, the current solar water heaters cannot receive the maximum area of ​​sunlight. In order to improve the utilization efficiency of sunlight, many manufacturers have introduced improved solar water heaters, such as: Publication No. CN106524526A, title: A solar water heater, the solar water heater is provided with a transparent tube on the outer surface of the vacuum tube, and a reflective film is provided on the transparent tube. By providing a driving source for driving the transparent tube, the transparent tube can rotate with the angle of sunlight, so that the area receiving sunlight reaches the maximum, and the sunlight receiving efficiency is improved. And this driving source includes a motor, a transmission device and a photosensitive device. The sunlight angle is determined by the photosensitive device, and the rotation angle of the motor is controlled by the controller, and the transparent tube is driven to rotate to a suitable angle by the transmission device; this design makes the overall structure more complicated, inconvenient to install and maintain, and the cost is high, which is not conducive to promotion. Summary of the invention

[0003] The object of the present invention is to provide a solar water heater in view of the deficiencies in the prior art. The solar water heater has a simple structure, low cost, and is convenient for driving a transparent tube to rotate without requiring an additional driving source.

[0004] A solar water heater comprises a base, a water tank and a vacuum tube connected to the water tank, the water tank is fixed to the upper end of the base, the upper end of the vacuum tube is connected to the water tank, the vacuum tube comprises an outer glass tube and an inner glass tube, the outer surface of the inner glass tube is coated with a heat absorbing layer; a vacuum cavity is formed between the outer glass tube and the inner glass tube; a glass partition is provided in the middle of the middle section of the inner glass tube along the length direction of the inner glass tube, the glass partition divides the inner glass space into a hot water space and a cold water space, the hot water space is located above the cold water space, and the hot water space and the cold water space are connected at the bottom of the inner glass tube; the upper end of the inner glass tube extends out of the outer glass tube to form a connecting section, and a heat absorbing layer is sleeved in the connecting section A rotating assembly is provided, which includes a rotating disk, a rotating shaft is provided in the middle of the rotating disk, the rotating shaft is inserted into the shaft hole, the rotating disk is provided with a rotating through hole for driving the rotating disk to rotate, a transparent sleeve is provided on the outer glass tube, and a reflective layer for reflecting sunlight to the vacuum tube is provided on one side of the inner side surface of the transparent sleeve; a connecting structure is provided between the transparent sleeve and the rotating disk; the rotating disk drives the transparent sleeve to rotate and the two rotate in unison; an inner friction section is provided on the side of the rotating disk, and the inner glass tube is provided with an outer friction section matched with the inner friction section, when the inner friction section contacts the outer friction section, there is friction between the rotating disk and the inner glass tube, and both the inner friction section and the outer friction section are arc-shaped surfaces.

[0005] Furthermore, the rotating disk is installed with an inner magnet, and the transparent sleeve is installed with an outer magnet matching with the inner magnet.

[0006] After the inner magnet and the outer magnet are set, the rotating disk and the transparent sleeve can remain separated, and the inner glass tube will not be provided with an additional structure to meet the connection between the rotating tube and the transparent sleeve, and the structure is simple. Secondly, it is also avoided to set up an additional driving mechanism to drive the transparent sleeve to rotate. Preferably, 4 inner magnets are installed in the rotating disk, which are: the first inner magnet, the second inner magnet, the third inner magnet, and the fourth inner magnet; 4 outer magnets are installed in the transparent sleeve; which are: the first outer magnet, the second outer magnet, the third outer magnet; the fourth outer magnet; the two adjacent inner magnets have opposite polarities, and the first inner magnet and the first outer magnet attract each other.

[0007] Furthermore, the inner glass tube is connected to a spring wire at the upper end of the rotating disk, and the lower end of the spring wire is connected to the rotating disk. When the spring wire is in an initial state, the inner friction section of the rotating disk is located in front of the outer friction section of the inner glass tube.

[0008] Furthermore, a light-inlet notch is provided in the middle of the transparent sleeve.

[0009] Furthermore, the lower end of the transparent sleeve is movably connected to the base body, and the transparent sleeve can rotate relative to the base body.

[0010] An upper magnet is arranged on the transparent sleeve, a lower magnet that repels the upper magnet and a socket for positioning the transparent sleeve are arranged on the base body, the lower end of the transparent sleeve is connected to a lower support body, the lower support body is provided with a mounting hole, the upper magnet is arranged in the mounting hole, and the base body is provided with a lower magnet below the socket; the base body is provided with a socket, and the transparent sleeve is inserted into the socket and suspended inside.

[0011] Preferably, the rotating through hole is arc-shaped.

[0012] Furthermore, a shell is provided outside the water tank, the shell is provided with an upper connecting hole matching with the transparent sleeve, the upper end of the transparent sleeve is inserted into the upper connecting hole, the upper end of the transparent sleeve is connected with an upper support body, the upper support body is connected with a secondary magnet, and the shell is provided with a main magnet matching with the secondary magnet.

[0013] Beneficial effects of the present invention: The present invention provides a rotating disk and a connecting structure so that the rotating disk can drive the transparent sleeve to rotate. The overall structure is simple, and there is no need to install a light sensing unit, thereby saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A structural diagram of this embodiment.

[0015] Figure 2 A cross-sectional diagram of a vacuum tube.

[0016] Figure 3 A schematic diagram of the cooperation between the vacuum tube and the transparent sleeve.

[0017] Figure 4 The figure is a schematic diagram of the structure of the rotating disk and the inner glass tube in the initial state of illumination.

[0018] Figure 5 The figure is a schematic diagram of the structure of the rotating disk and the inner glass tube in the maximum illumination state.

[0019] Figure 6 The figure is a schematic diagram of the structure of the rotating disk and the inner glass tube in the final stage of illumination.

[0020] Figure 7 The present invention is a structural schematic diagram of the cooperation between the rotating disk and the inner glass tube in the initial state of illumination with a spring wire.

[0021] Figure 8 The present invention is a structural schematic diagram of the rotating disk and the inner glass tube in the final state of illumination with a spring wire.

[0022] Fig. 9 A schematic diagram of the structure of a transparent sleeve.

[0023] Fig.10 It is a schematic diagram of the coordination between the transparent sleeve and the vacuum tube under light.

[0024] Fig.11 This is a schematic diagram of the second coordination between the transparent sleeve and the vacuum tube under light.

[0025] Fig.12 This is a schematic diagram of the third combination of the transparent sleeve and the vacuum tube under light.

[0026] Figures 4 to 8 The arrow in indicates the rotation direction of the rotating disk; Figures 10 to 12 The arrow indicates the direction of light.

[0027] Reference numerals include:

[0028] 1——base; 2——water tank; 3——shell; 4——main magnet; 5——upper support; 6——secondary magnet; 7——rotating disk; 8——external magnet; 9——connecting ring; 10——transparent sleeve; 11——vacuum tube; 12——lower support; 13——upper magnet; 14——lower magnet; 16——outer glass tube; 17——inner glass tube; 18——heat absorbing layer; 19——glass partition; 20——axial hole; 21——reflective layer; 22——inner magnet; 23——rotating through hole; 24——rotating shaft; 25——outer friction section; 26——inner friction section; 27——spring wire; 28——light inlet gap. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings. Figures 1 to 12 shown.

[0030] Example: See Figure 1 A solar water heater comprises a base 1, a water tank 2 and a vacuum tube 11 connected to the water tank 2. The water tank 2 is fixed to the upper end of the base 1, and the upper end of the vacuum tube 11 is connected to the water tank 2. Figure 2 The vacuum tube 11 comprises an outer glass tube 16 and an inner glass tube 17. The inner glass tube 17 is coated with a heat absorbing layer 18. A vacuum cavity is formed between the outer glass tube 16 and the inner glass tube 17. A glass partition 19 is provided in the middle of the middle section of the inner glass tube 17 along the length direction of the inner glass tube 17. The glass partition 19 divides the inner glass space into a hot water space and a cold water space. The hot water space is located above the cold water space, and the hot water space and the cold water space are connected at the bottom of the inner glass tube 17. The upper end of the inner glass tube 17 extends out of the outer glass tube 16 to form a connecting section. Figure 3, a rotating assembly is sleeved in the connecting section, and the rotating assembly includes a rotating disk 7, a rotating shaft 24 is provided in the middle of the rotating disk 7, the rotating shaft 24 is inserted into the shaft hole 20, and the rotating disk 7 is provided with a plurality of rotating through holes 23 for driving the rotating disk 7 to rotate, and the outer glass tube 16 is provided with a transparent sleeve 10, and one side of the inner side of the transparent sleeve 10 is provided with a reflective layer 21 for reflecting sunlight to the vacuum tube 11; a connecting structure is provided between the transparent sleeve 10 and the rotating disk 7; the rotating disk 7 drives the transparent sleeve 10 to rotate and the two rotate in unison; see Figures 4 to 6 The side of the rotating disk 7 is provided with an inner friction section 26, and the inner glass tube 17 is provided with an outer friction section 25 matched with the inner friction section 26. When the inner friction section 26 contacts the outer friction section 25, there is friction between the rotating disk 7 and the inner glass tube 17. The inner friction section 26 and the outer friction section 25 are both arc-shaped surfaces. The central angle corresponding to the two arc-shaped surfaces is 80 to 100 degrees, preferably 90 degrees. The number of vacuum tubes 11 is recommended to be no less than 3; preferably, the adjacent interval is no less than 10 cm.

[0031] After the heat absorption layer 18 absorbs heat, the hot water floats up and enters the hot water space, and comes out of the hot water space and passes through the rotating through hole 23 to enter the top of the water tank 2; at this time, the cold water below the water tank 2 passes through the rotating through hole 23 to enter the cold water space for filling; in this process, when the hot water and the cold water pass through the rotating through hole 23, they will both apply a torque to the rotating disk 7, and the directions of the two torques are the same, so the rotating disk 7 is driven to rotate. The rotating through hole 23 is set to an inclined shape or a spiral shape, etc. When the water flows through, the water flows to apply a thrust to the inclined surface of the rotating through hole 23, and the thrust has a component force perpendicular to the radial direction of the rotating disk 7, which can form a torque to drive the rotating disk 7 to rotate. The design of this rotating through hole 23 is a prior art and will not be repeated. Since the water flow speed is related to the sun's irradiation angle, that is, the torque generated by the water flow on the rotating shaft 24 is related to the sun's irradiation angle, so that the rotation angle of the rotating disk 7 is related to the sun's irradiation angle. When designed, the rotation angle of the rotating disk 7 matches the rotation of the sun's irradiation angle. During use, when sunlight is shining, especially in the morning or evening, the vacuum tube 11 may block the adjacent vacuum tubes 11. Therefore, when designing, the distance between the vacuum tubes 11 is appropriately set to be larger to reduce or avoid blocking. Of course, this blocking is only short-term. Once sunlight is shining, the rotating assembly will rotate.

[0032] Secondly, since the flow direction of the cold water is opposite to that of the hot water and they are located on both sides respectively, the torques generated by the cold water and the hot water on the rotating shaft 24 are in the same direction.

[0033] An inner friction section 26 is provided on the side of the rotating disk 7, and an outer friction section 25 matching the inner friction section 26 is provided on the inner glass. When the rotating disk 7 rotates to the point where the outer friction section 25 contacts the inner friction section 26, the friction force between the rotating disk 7 and the inner glass is greatly increased. In this design, both the inner friction section 26 and the outer friction section 25 are 90-degree circular arc surfaces, i.e., 1 / 4 circular arc surfaces; see Figures 4 to 6 In the initial stage, the inner friction section 26 is adjacent to the outer friction section 25; when sunlight appears, hot water flows, and the torque of the water flow on the rotating disk 7 gradually increases and overcomes the friction force; under the premise that the width of the rotating disk 7 is certain, the friction force is related to the contact length. Therefore, the greater the sunlight intensity and the greater the water flow, the greater the contact length overcome by the rotation. When the sunlight direction is from 0 degrees to 90 degrees, the sunlight intensity gradually increases, and the rotation angle gradually increases, so that the sunlight intensity matches the friction force, and the rotating disk 7 also rotates from 0 degrees to 90 degrees, and the inner friction section 26 is completely in contact with the outer friction section 25; when the sunlight direction is from 90 degrees to 180 degrees, the sunlight intensity gradually weakens, and the rotating disk 7 also rotates from 90 degrees to 180 degrees (the rotating disk 7 takes the initial angle of 0 degrees), and the contact area between the inner friction section 26 and the outer friction section 25 gradually decreases from the maximum to completely separated. On the second day, when sunlight appears, since the inner friction section 26 is separated from the outer friction section 25, as long as hot water flows, the rotating disk 7 will immediately rotate from 180 degrees to 360 degrees (0 degrees), and then rotate from 0 degrees to an angle matching the sunlight angle. The rotating disk 7 drives the transparent sleeve 10 to move, and the rotation of the rotating disk 7 and the transparent sleeve 10 is basically consistent.

[0034] In addition, in the design, the sides of the rotating disk 7 and the inner glass tube 17 can be in contact only when the inner friction section 26 and the outer friction section 25 are in contact. Otherwise, the sides of the rotating disk 7 and the inner glass tube 17 are in a separated state, and the gap between them is very small; or the friction force is very small. When designing the inner friction section 26 and the outer friction section 25, the surface can be polished to form a concave and convex surface, or the surface can be locally heated to form a convex and concave surface.

[0035] Further, the rotating disk 7 is installed with an inner magnet 22, and the transparent sleeve 10 is installed with an outer magnet 8 that matches the inner magnet 22. To facilitate the installation of the outer magnet 8, a connecting ring 9 is connected to the outer surface of the transparent sleeve 10, and the connecting ring 9 is provided with a mounting hole, and the outer magnet 8 is installed in the mounting hole. Similarly, a mounting hole for installing the inner magnet 22 can be provided in the rotating disk 7.

[0036] After the inner magnet 22 and the outer magnet 8 are provided, the rotating disk 7 and the transparent sleeve 10 can remain separated, and the inner glass tube 17 will not be provided with an additional structure to satisfy the connection between the rotating tube and the transparent sleeve 10, and the structure is simple. Secondly, it is also avoided to provide an additional driving mechanism to drive the transparent sleeve 10 to rotate. Preferably, four inner magnets 22 are installed on the side of the rotating disk 7, and they are evenly distributed; they are: the first inner magnet 22, the second inner magnet 22, the third inner magnet 22, and the fourth inner magnet 22; four outer magnets 8 are installed in the transparent sleeve 10; they are: the first outer magnet 8, the second outer magnet 8, the third outer magnet 8; the fourth outer magnet 8; the two adjacent inner magnets 22 have opposite polarities, and the first inner magnet 22 and the first outer magnet 8 attract each other.

[0037] See also Figure 7 , Figure 8 Furthermore, the inner glass tube 17 is connected to a spring wire 27 at the upper end of the rotating disk 7, and the lower end of the spring wire 27 is connected to the rotating disk 7. When the spring wire 27 is in the initial state, the inner friction section 26 of the rotating disk 7 is located in front of the outer friction section 25 of the inner glass tube 17.

[0038] During design, the elastic tension of the spring wire 27 is much smaller than the friction force and the thrust of the flowing water on the rotating disk 7 ; so that the tension of the spring wire 27 does not affect the rotation angle of the rotating disk 7 in sunlight. The spring wire 27 can help the rotating disk 7 to reset; specifically, in the initial state, the inner friction section 26 of the rotating disk 7 is located in front of the outer friction section 25 of the inner glass tube 17, and the spring wire 27 is not deformed, that is, there is no tension; when there is sunlight, the water temperature rises, and the flowing water pushes the rotating disk 7, so that the inner friction section 26 of the rotating disk 7 immediately rotates toward the outer friction section 25, and pulls up the spring wire 27; it is assumed that the sunshine time is from 6 o'clock to 18 o'clock; during this period of time, the torque generated by the tension of the spring wire 27 on the rotating disk 7 is positive M, which prevents the rotating disk 7 from rotating; after the daytime sunlight, the rotating disk 7 rotates 180 degrees; at this time, the torque generated by the tension of the spring wire 27 on the rotating disk 7 becomes negative M; at this time, the function of the spring wire 27 on the rotating disk 7 is to pull the rotating disk 7 to continue rotating. In the specific design, if the starting point of the outer friction section 25 of the inner glass tube 17 is 0 degrees, the angle of the spring wire 27 at the position is -t degrees; if t is 1-20; at 6 o'clock in the sun, the rotating disk 7 rotates t degrees first, so that the inner friction section 26 reaches 0 degrees first; at 18 o'clock, the rotating disk 7 rotates a total of (t+180) degrees; the torque direction of the spring wire 27 on the rotating disk 7 changes, and at this time, the rotating disk 7 can continue to be pulled along the original direction by the torque of the spring wire 27 on the rotating disk 7 until the rotating disk 7 is reset. The spring wire 27 can be connected to the inner glass tube 17 and the rotating disk 7 respectively by bonding.

[0039] See also Fig. 9Furthermore, a light-entry notch 28 is provided in the middle of the transparent sleeve 10 .

[0040] When sunlight is projected, in order to reduce the absorption, refraction or reflection of sunlight by the transparent sleeve 10, the present technical solution provides a notch in the middle of the transparent sleeve 10; the notch is the part where the reflective layer 21 is not provided. After the notch is provided, the reflective layer 21 can be conveniently installed, and the reflective layer 21 can be connected to the inner side of the transparent sleeve 10 by bonding. The reflective layer 21 can be a reflective film.

[0041] Furthermore, the lower end of the transparent sleeve 10 is movably connected to the base body 1 , and the transparent sleeve 10 can rotate relative to the base body 1 .

[0042] The lower end of the transparent sleeve 10 can be movably connected to the base body 1 through a bearing. Of course, it can also be connected to the base body 1 through a magnet; by setting an upper magnet 13 on the transparent sleeve 10, setting a lower magnet 14 that repels it on the base body 1, and a socket for positioning the transparent sleeve 10. For example:

[0043] See also Figure 1 , Figure 3 Preferably, the lower end of the transparent sleeve 10 is connected to a lower support 12, the lower support 12 is provided with a mounting hole, the upper magnet 13 is arranged in the mounting hole, the base 1 is provided with a lower magnet 14 below the insertion hole; the base 1 is provided with an insertion hole, the transparent sleeve 10 is inserted into the insertion hole and suspended therein. The friction is reduced by suspension.

[0044] Preferably, the rotating through hole 23 is arc-shaped.

[0045] When the rotating through hole 23 is provided, the shape of the rotating through hole 23 is equivalent to the shape of the gap hole between two adjacent turbine blades on the hull turbine; when water flows through, the thrust obtained by the rotating disk 7 is the maximum, and the rotating disk 7 can be driven to rotate.

[0046] Furthermore, the water tank 2 is provided with a shell 3 outside, the shell 3 is provided with an upper connecting hole matching with the transparent sleeve 10, the upper end of the transparent sleeve 10 is inserted into the upper connecting hole, the upper end of the transparent sleeve 10 is connected with an upper support body 5, the upper support body 5 is connected with a secondary magnet 6, and the shell 3 is provided with a main magnet 4 matching with the secondary magnet 6.

[0047] The auxiliary magnet 6 cooperates with the main magnet 4 to assist in supporting the transparent sleeve 10, so that the force between the transparent sleeve 10 and the housing 3 is small or non-existent, reducing the friction between them. As a variation, one of the auxiliary magnet 6 and the main magnet 4 can be replaced by iron.

[0048] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A solar water heater, comprising a base, a water tank and a vacuum tube connected to the water tank, the water tank being fixed to the upper end of the base, the upper end of the vacuum tube being connected to the water tank, the vacuum tube comprising an outer glass tube and an inner glass tube, the outer surface of the inner glass tube being coated with a heat absorbing layer; a vacuum cavity being formed between the outer glass tube and the inner glass tube; a glass partition being arranged along the length direction of the inner glass tube in the middle of the middle section of the inner glass tube, the glass partition dividing the inner glass space into a hot water space and a cold water space, the hot water space being located above the cold water space, and the hot water space and the cold water space being connected at the bottom of the inner glass tube; the upper end of the inner glass tube extending out of the outer glass tube to form a connecting section, characterized in that: A rotating assembly is sleeved in the connecting section, and the rotating assembly includes a rotating disk, a rotating shaft is provided in the middle of the rotating disk, the rotating shaft is inserted into the shaft hole, and the rotating disk is provided with a plurality of rotating through holes for driving the rotating disk to rotate; a transparent sleeve is provided on the outer glass tube, and a reflective layer for reflecting sunlight to the vacuum tube is provided on one side of the inner side surface of the transparent sleeve; a connecting structure is provided between the transparent sleeve and the rotating disk; the rotating disk drives the transparent sleeve to rotate and the two rotate in unison; an inner friction section is provided on the side of the rotating disk, and the inner glass tube is provided with an outer friction section matched with the inner friction section, and when the inner friction section contacts the outer friction section, there is friction between the rotating disk and the inner glass tube, and both the inner friction section and the outer friction section are arc-shaped surfaces; The rotating disk is equipped with an inner magnet, and the transparent sleeve is equipped with an outer magnet matching with the inner magnet; The inner glass tube is connected with a spring wire at the upper end of the rotating disk, and the lower end of the spring wire is connected to the rotating disk. When the spring wire is in the initial state, the inner friction section of the rotating disk is located in front of the outer friction section of the inner glass tube.

2. A solar water heater according to claim 1, characterized in that: A light-inlet notch is arranged in the middle of the transparent sleeve.

3. A solar water heater according to claim 1, characterized in that: The lower end of the transparent sleeve is movably connected to the seat body, and the transparent sleeve can rotate relative to the seat body.

4. A solar water heater according to claim 3, characterized in that: An upper magnet is arranged on the transparent sleeve, a lower magnet that repels the upper magnet and a socket for positioning the transparent sleeve are arranged on the base body, the lower end of the transparent sleeve is connected to a lower support body, the lower support body is provided with a mounting hole, the upper magnet is arranged in the mounting hole, and the base body is provided with a lower magnet below the socket; the base body is provided with a socket, and the transparent sleeve is inserted into the socket and suspended inside.

5. A solar water heater according to claim 1, characterized in that: The rotating through hole is arc-shaped.

6. A solar water heater according to claim 1, characterized in that: A shell is provided outside the water tank, and the shell is provided with an upper connecting hole matched with the transparent sleeve, the upper end of the transparent sleeve is inserted into the upper connecting hole, the upper end of the transparent sleeve is connected with an upper support body, the upper support body is connected with a secondary magnet, and the shell is provided with a main magnet matched with the secondary magnet.

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