CN212538320U - Photovoltaic-photothermal device - Google Patents

Abstract

The application relates to a photovoltaic-photothermal device, comprising: the bed frame, with bed frame fixed connection's thermal-collecting tube, arrange in thermal-collecting tube radial outside portion and can center on thermal-collecting tube pivoted photovoltaic board, photovoltaic board has and deviates from the photovoltaic working face of thermal-collecting tube. The device combines together photovoltaic power generation and light and heat heating, can select photovoltaic or light and heat mode as required, promotes the utilization ratio to solar energy.

Description

Photovoltaic-photothermal device

Technical Field

The present application relates to photovoltaic-photothermal devices, and more particularly to photovoltaic-photothermal devices that can achieve photovoltaic-photothermal switching.

Background

Solar energy, as a renewable energy source, has been widely used, such as photovoltaic power generation, photo-thermal heating, photo-thermal power generation, etc., and solar energy is also a main direction for developing green energy in the future. Two technical approaches for utilizing solar energy exist: namely, photovoltaic power generation and photothermal heating, have been popularized in every country around the world. The solar power generation device and the heating device in the prior art are two devices which are respectively arranged, and the photovoltaic utilization and the photothermal utilization of solar energy have advantages and disadvantages, so that the solar power generation device and the heating device cannot be installed at the same time, namely, only power generation can be carried out but not heating or only heating but not power generation can be carried out, so that the advantages of the two devices cannot be complemented, heating and power generation cannot be carried out at the same time, and the full and efficient utilization of the solar energy is influenced.

When pure photovoltaic power generation is carried out, the photoelectric conversion efficiency is low, the conversion efficiency is generally 12% -17% of the solar energy radiation amount, namely about 83% of solar energy irradiated on the surface of a photovoltaic panel cannot be utilized and converted, a considerable part of energy is converted into heat energy to be lost, and meanwhile, the generated heat energy can also increase the temperature of the photovoltaic panel to cause the reduction of the cell efficiency and further reduce the photoelectric conversion rate; therefore, the problems of low conversion rate and much solar energy loss exist in pure photovoltaic power generation.

When the solar water heater is used for heating by pure light and heat, like a common solar water heater, the light and heat conversion efficiency is high and is generally more than 50% of the solar radiation amount, however, the problem exists that the household bathing needs not daily, so that hot water generated in most days is wasted in storage, and particularly for schools provided with solar water heating systems, the solar water heating system meets the requirements of students in the beginning period, but the solar water heating system is used in cold and hot days in a longer period, and the light irradiation amount is the largest at the moment, so that the water heater is in a storage state without being used by people, and the energy waste is caused; in addition, for a solar hot water heating system, the efficiency of a winter heating and photo-thermal heating device is much higher than that of a photovoltaic power generation heating device, for example, a 100 square meter house is heated in winter, for example, a 50 square meter photovoltaic power generation device is installed, the power generation energy in a fine day cannot meet the requirement, for example, a 50 square meter photo-thermal utilization device is installed, the absorbed heat energy can completely meet the requirement through hot water heating, however, the house is generally heated only in winter, the heating time is about three months, the rest of the time is in a shelf state, the collected heat energy is useless, and the waste is useless; therefore, the problems of low use frequency and long standing and swaying period exist in the pure photo-thermal heating.

As described above, the existing two utilization methods of photovoltaic power generation and photothermal heating of solar energy, which are based on the above problems, respectively, result in insufficient utilization of solar energy, the products based on solar energy are not yet popularized or applied in a large scale in the market at present, the unique properties of solar energy as clean, readily available and inexhaustible are not well developed and utilized, and the product utilizing solar energy technology has more prominent and more serious defects due to the shortage of people in application and research and development of solar energy technology, and similar products such as solar water heaters are even abandoned in the market, so that the utilization technology of solar energy needs to be urgently updated in the face of the current energy crisis and pursuit of cleanness and no pollution.

However, in practice, the combination of photovoltaic power generation and photothermal heating is a difficult technical problem, and there are many technical problems to be overcome in the combination of the two, which are also determined by the current basic equipment of photovoltaic power generation and photothermal heating: because the photovoltaic panel is mostly a flat complete panel, the photothermal device is mostly heat collecting tubes arranged in an array manner, the photovoltaic panel and the heat collecting tubes cannot be combined and cooperate together to make up respective defects of two technologies, solar energy is utilized to the maximum, two gains of hot water and electric power cannot be obtained simultaneously, the devices which combine photovoltaic power generation and photothermal heating to obtain heat energy and electric energy and output simultaneously are very few in the current market, some devices are provided with a plurality of heat collecting tubes at the back of the photovoltaic panel to utilize heat energy to heat, however, the mode has the problems that the heat collecting tube heating still causes heat dissipation and cannot be released, the temperature of the photovoltaic panel can be increased to cause the reduction of battery efficiency, and the service life is shortened; therefore, the photovoltaic-photothermal device capable of realizing photovoltaic-photothermal switching has important significance, and has innovation significance for the solar energy to be recycled and used in family life as a product.

Disclosure of Invention

The technical problem that this application will solve is: the photovoltaic-photothermal device capable of realizing photovoltaic-photothermal switching combines photovoltaic power generation and photothermal heating, can select power generation or heating as required, and greatly improves the utilization rate of solar energy.

The technical scheme of the application is as follows: a photovoltaic-photothermal device comprising:

a base frame, and

the heat collecting pipe is fixedly connected with the base frame;

still including arranging in the radial outside portion of thermal-collecting tube and can center on thermal-collecting tube pivoted photovoltaic board, photovoltaic board has and deviates from the photovoltaic working face of thermal-collecting tube.

On the basis of the technical scheme, the application also comprises the following preferable scheme:

the photovoltaic panel is arranged in parallel at the radial outer side part of the heat collecting tube, and the rotation axis of the heat collecting tube is superposed with the tube axis of the heat collecting tube.

The thermal-collecting tube sets up two at least, the photovoltaic board sets up two at least, each the thermal-collecting tube is separated by parallel arrangement each other, each the equal parallel arrangement of photovoltaic board corresponds one the radial outside portion of thermal-collecting tube and can rotate around this thermal-collecting tube to each photovoltaic board all is less than the distance of this thermal-collecting tube and adjacent this thermal-collecting tube with the distance that corresponds a thermal-collecting tube.

The photovoltaic panel capable of rotating around the tube axis of each heat collecting tube is arranged on the radial outer side of each heat collecting tube in parallel.

Each heat collecting pipe is arranged in the same plane.

All the heat collecting pipes are arranged at equal intervals.

The width of each photovoltaic plate is equal to the distance between two adjacent heat collecting pipes.

The solar collector tube sets up two at least, the photovoltaic board sets up two at least, each the photovoltaic board equipartition is arranged in and is corresponded one the radial outside portion of collector tube, at least one wherein the rotatory route of photovoltaic board all passes through two adjacent that correspond interval space between the collector tube.

The photovoltaic panel is connected with the heat collecting tube in a pivoting mode.

The photovoltaic panel is fixedly connected with a pivoting frame which is pivoted on the heat collecting tube in a sleeved mode.

The pivoting frame is fixedly connected with a gear coaxially sleeved outside the heat collecting pipe, and the base frame is provided with a motor which is in transmission connection with the gear to drive the gear to rotate.

A water flowing cavity is fixedly arranged on the base frame, and one end of the heat collecting pipe is fixedly inserted into the water flowing cavity in a sealing mode.

The photovoltaic panel is towards that one side fixed connection reflector panel of thermal-collecting tube, the reflector panel has the orientation the reflection of light face of thermal-collecting tube.

The reflecting surface is a concave curved surface.

The light reflecting surface is an inwards concave cambered surface.

The photovoltaic panel with the reflector panel is the cambered plate that centers on the thermal-collecting tube is arranged, the photovoltaic panel with the reflector panel pastes and leans on and arranges.

The photovoltaic working surface is an outer convex cambered surface.

The photovoltaic panel is an arc panel arranged around the heat collecting tube.

The photovoltaic panel is attached to the heat collecting tube.

The application can realize the following beneficial effects:

1. the photovoltaic-photothermal device can realize the switching of photovoltaic-photothermal, changes the high-efficiency utilization mode of solar energy, combines the photovoltaic power generation and the photothermal heating, can select power generation or heating as required, realizes the full utilization of the solar energy, and has innovation significance for the ecological development mode of energy conservation, no pollution and sustainable development.

2. This application had both overcome the defect that independent photovoltaic power generation conversion efficiency is low, had overcome the light and heat alone again and heated the use frequency not high, shelved the defect of stall cycle length, heat and carry out photovoltaic power generation when not using at light and heat, heat photovoltaic power generation and light and heat and combine together, realize the electric power output and the heat energy output during non-photovoltaic power generation in the non-light and heat heating period, combine together the two, compensate each shortcoming, the most interests of obtaining energy output.

3. This application can realize turning to the tracking of sunshine, realizes dynamic adjustment, has improved unit heat collecting area's energy output, acquires the maximum light intensity, can make full use of photic area obtain more thermoelectric output like roof or building outer wall in the limited occasion of usable area.

4. The solar water heater can be directly applied to family life, hot water generated by photo-thermal heating meets the requirement of family bathing, and direct current collected by photovoltaic power generation is stored for household appliances.

5. The photovoltaic board is arranged in the radial outside of thermal-collecting tube, only needs the width of reasonable selection photovoltaic board, alright make full use of directive thermal-collecting tube interval space's sunshine, sunshine area when promoting photovoltaic power generation.

6. The heat collecting tube is fixed with the base frame, and the photovoltaic panel is rotationally connected with the heat collecting tube. The problem of water leakage at the splicing part of the heat collecting pipe and the water flowing cavity can not occur, and the problems of deformation of the aluminum foil and scratching of the heat absorbing coating can also not occur.

7. The photovoltaic panel faces the fixed reflector on one side of the heat collecting tube, and the reflecting surface of the reflector faces the heat collecting tube, so that the photo-thermal conversion efficiency of the photo-thermal mode is improved. And, this device is often switched over at during practical application photovoltaic and light and heat mode, and photovoltaic board and reflector panel expose the photic in turn, and the pollution rate of photovoltaic working face and reflection of light face slows down, so the photovoltaic conversion efficiency of photovoltaic board and the reduction rate of the reflection of light efficiency of reflector panel all can slow down, need not the user and clears up photovoltaic working face and reflection of light face frequently, and the maintenance frequency that needs is low.

8. Fix photovoltaic board and reflector panel together, the two is mutually supported and works in turn respectively at photovoltaic and two kinds of modes of light and heat, need not to set up independent installation space for photovoltaic board and reflector panel respectively for still have fine compact structure degree when the device compromises photovoltaic light and heat function, it is very ingenious.

9. The reflecting surface of the reflector is an inwards concave curved surface, has a light gathering function, can reflect solar rays emitted to the space between adjacent heat collecting pipes to the heat collecting pipes as much as possible, improves the solar energy utilization rate, has higher temperature under the gathering action of the reflecting surface, improves the temperature difference between the inside and the outside of the heat collecting pipes, and is favorable for absorbing heat of external light rays by water flow or a heat absorbing coating in the pipes.

10. The reflector panel can rotate along with the photovoltaic board, under the light and heat mode, can be according to the angle of sunshine irradiation angle adjustment reflector panel to with the sunshine fully reflection of any period in one day to the thermal-collecting tube, further promote solar energy utilization ratio.

11. The photovoltaic board adopts the cambered surface plate structure of arranging around the thermal-collecting tube, when increase photovoltaic working area for each thermal-collecting tube can be inseparabler (the booth) arrange, and then is favorable to reducing the size of this photovoltaic-light and heat device, promotes the whole photic area of device.

12. Photovoltaic board and reflector panel all adopt the cambered plate structure, and the two pastes to paste each other and fixes together, have not only promoted the light that reflector panel reflected to the thermal-collecting tube under the light and heat mode, in addition when increase reflection area and photovoltaic working area to make arranging that each thermal-collecting tube can be inseparabler (the booth) more, be favorable to reducing the size of this photovoltaic-light and heat device, promote the whole photic area of device, it is fairly ingenious.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description only relate to some embodiments of the present application and are not limiting on the present application.

Fig. 1 is a schematic view of a photovoltaic-photothermal device in a photovoltaic state according to an embodiment of the present disclosure.

Fig. 2 is a schematic view of a photovoltaic-photothermal device in a photothermal state according to one embodiment of the present disclosure.

Fig. 3 is a schematic plan view of a first embodiment of the present application.

Fig. 4 is a sectional view taken along line a-a of fig. 1.

Fig. 5 is a schematic view of a matching structure of the photovoltaic panel, the pivoting frame, the heat collecting tube and the synchronizing gear in the first embodiment of the present application.

Fig. 6 is a schematic view of a matching structure of a photovoltaic panel, a connecting frame, a first form heat collecting tube and a synchronizing gear in the second embodiment of the present application.

Fig. 7 is a schematic view of a matching structure of a photovoltaic panel, a connecting frame, a second type heat collecting tube and a synchronizing gear in the second embodiment of the present application.

Fig. 8 is a schematic structural distribution diagram of a photovoltaic panel, a reflector panel and a heat collecting tube in the third embodiment of the present application.

Fig. 9 is a schematic structural distribution diagram of a photovoltaic panel, a reflector panel and a heat collecting tube in the fourth embodiment of the present application.

Fig. 10 is a schematic structural distribution diagram of a photovoltaic panel, a reflector panel and a heat collecting tube in the fifth embodiment of the present application.

Wherein:

the solar heat collector comprises a base frame 1, a water flowing cavity 2, a water inlet 2a, a water outlet 2b, six heat collecting pipes 3, a photovoltaic panel 4, a synchronous gear 5, a bridge gear 6, a pivoting frame 7, a reflector 8, a connecting frame 9 and a heat conducting sleeve 10.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without any inventive step, are within the scope of protection of the application.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of "first," "second," and similar terms in the description and claims of this patent application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.

Embodiments of the present application will now be described with reference to the accompanying drawings.

The first embodiment is as follows:

fig. 1 to 5 show a preferred embodiment of the photovoltaic-photothermal device of the present application. The photovoltaic-photothermal device of the present embodiment also includes a base frame 1, and a water flowing cavity 2 and six heat collecting tubes 3 are fixedly disposed on the base frame 1, as with some existing photothermal devices (such as a solar water heater). The water-flowing cavity 2 is provided with a water inlet interface 2a and a water outlet interface 2b, and the water inlet interface 2a and the water outlet interface 2b are respectively connected with a water inlet pipeline and a water outlet pipeline in practical application, so that flowing water is introduced into the water-flowing cavity 2. One end of each heat collecting pipe 3 is inserted into the water cavity (the matching part is sealed and does not leak water). In order to facilitate the manufacture and assembly, the heat collecting pipes 3 are arranged in the same plane at equal intervals. The base frame 1 serves as a support carrier for the entire photovoltaic-photothermal device, supporting the aforementioned water running chamber 2 and heat collecting pipe 3, as well as the various components described below, and defining the aforementioned plane. Of course, in some other embodiments of the present application, the heat collecting pipes 3 may be arranged at random intervals, and are not necessarily in the same plane.

The key improvement of the embodiment is as follows: the device is also provided with six photovoltaic panels 4 with the same number as the heat collecting tubes. These photovoltaic panels 4 are arranged one-to-one on the radially outer side of each collector tube, and each photovoltaic panel 4 can rotate around the corresponding collector tube. That is, the photovoltaic panels 4 are rotationally connected, but not rigidly connected, to the apparatus, and the axis of rotation of each photovoltaic panel 4 on the base frame 1 is exactly the tube axis of the corresponding collector tube 2.

By "radially outer portion" is meant that the photovoltaic panel is located on a radial side of the collector tube and not within the collector tube.

For convenience of describing the technical solution of the present embodiment, if a unit formed by one heat collecting tube 3 and one photovoltaic panel 4 corresponding to each other in fig. 1 and fig. 2 is referred to as a photovoltaic-thermal unit, the photovoltaic-thermal device of the present embodiment has six photovoltaic-thermal units in total. In each photovoltaic-photothermal unit, the axis of rotation of the photovoltaic panel 4 on the base frame is exactly the tube axis of that collector tube 3 in that unit. Further, in each photovoltaic-photothermal unit, the photovoltaic panel 4 has an inner panel surface facing the unit heat collecting pipe 3 (i.e., the upper surface of the photovoltaic panel in fig. 5) and an outer panel surface facing away from the unit heat collecting pipe 3 (i.e., the lower surface of the photovoltaic panel in fig. 5), and the aforementioned outer panel surface of the photovoltaic panel 4 of the present embodiment is a photovoltaic working surface for receiving solar power generation.

It can be seen that, because the photovoltaic panel 4 can rotate around the heat collecting tube 3 on the base frame 1, the relative position of the photovoltaic panel 4 and the heat collecting tube 3 can be adjusted by rotating the photovoltaic panel 4. When the heat collecting tube 3 is required to absorb light energy to obtain heat, the photovoltaic panel 4 is rotated to the backlight side (the side deviating from the sunlight) of the heat collecting tube 3, and the heat collecting tube emits light and generates heat. When photovoltaic power generation is needed, the photovoltaic panel 4 is rotated to the light-facing side (i.e. the side facing the sunlight) of the heat collecting tube 3, at this time, the photovoltaic working surface of the photovoltaic panel 4 just faces the sunlight and is in a working state, and the photovoltaic panel 4 faces the light for power generation.

It can be seen that when the photovoltaic-photothermal device is in the photovoltaic power generation operating mode, the heat collecting tube 3 is located at the backlight side of the photovoltaic panel 4, sunlight is received and shielded by the photovoltaic panel 4 and cannot be emitted to the heat collecting tube 3, and the heat collecting tube 3 no longer absorbs heat to heat water in the water flowing cavity 2.

In practical application, the photothermal working mode and the photovoltaic working mode of the device can be flexibly selected according to requirements. Such as: after enough heat energy is obtained in the photo-thermal working mode, the photo-thermal working mode is switched to the photovoltaic working mode to generate electricity, so that solar energy is fully utilized to generate heat and generate electricity, the solar energy utilization efficiency is increased, the solar energy generation and the heat generation are integrated, and the space resource is saved.

In addition, in order to make the whole structure of the device more compact and reasonable, the photovoltaic plate 4 and the heat collecting pipe 3 in each photovoltaic-photothermal unit are arranged in parallel in the present embodiment.

In order to avoid that the photovoltaic panel 4 touches the heat collecting tube 3 of the adjacent photovoltaic-photothermal unit when rotating, and thus the rotation angle of the photovoltaic panel 4 is limited by the heat collecting tube 3 in the adjacent photovoltaic-photothermal unit, the photovoltaic panel 4 and the heat collecting tube 3 in each photovoltaic-photothermal unit should be arranged as close as possible. Generally, it is required to ensure that the distance between the photovoltaic plate 4 and the heat collecting tube 3 in each photovoltaic-photothermal unit should be smaller than the distance between the heat collecting tube 3 in the unit and the heat collecting tube in the adjacent unit. When the photovoltaic panel 3 rotates, the photovoltaic panel can penetrate through the gaps between the adjacent heat collecting pipes.

In fig. 1 and 2, six heat collecting tubes 3 and six photovoltaic panels 4 are arranged together, the six heat collecting tubes are sequentially arranged in the same plane at equal intervals, an interval space is formed between every two adjacent heat collecting tubes 3, and five interval spaces are formed by the six heat collecting tubes. Of the six photovoltaic panels 4, five photovoltaic panels (the left five photovoltaic panels in fig. 1 and 2) have rotational paths passing through the aforementioned five spaces, respectively. The rotation path of a photovoltaic panel 4 (the rightmost photovoltaic panel in fig. 1 and 2) passes through the right space of the rightmost heat collecting tube 3. Therefore, each photovoltaic panel 4 can be selectively rotated to the backlight surface or the light-facing surface of the corresponding heat collecting tube 3.

In addition, in order to facilitate the rotation of the photovoltaic panel 4, the device of the present embodiment is further provided with a driving device in transmission connection with the photovoltaic panel to drive the photovoltaic panel to rotate.

The driving device specifically includes: six synchronizing gears 5, six carrier gears 6 and a miniature motor (not shown in the figure). The six synchronizing gears 5 are fixed (indirectly fixed, described in detail below) to the six photovoltaic panels 5, respectively. The carrier gear 6 is in meshed connection with the synchronizing gear 5. The motor can directly drive any one of the six synchronous gears 5 and the six carrier gears 6, so that the linkage of all the synchronous gears 5 and all the carrier gears 6 can be realized, and each photovoltaic panel 4 can be in any preset orientation. "synchronization" in the synchronizing gear 5 means: under the drive of the motor, the rotation angles and the pitches of the six gears are completely consistent, so that the rotation angles and the pitches of the six photovoltaic panels 4 are completely consistent.

The motor is fixedly arranged on the base frame 1.

In addition, the present embodiment is also provided with a controller electrically connected to the above-described driving device to precisely control the rotation angle of the photovoltaic panel 4 by means of the controller. In this embodiment, the controller is specifically a motor controller connected to the motor circuit, and the motor controller indirectly adjusts the angle of the photovoltaic panel by controlling the rotation angle of the motor.

As already described above, in the present embodiment, each photovoltaic panel 4 is rotatably connected to the base frame 1. The rotational connection of these photovoltaic panels 4 to the base frame 1 is further described below:

each photovoltaic plate 4 is fixed with a pivoting frame 7, and the pivoting frame 7 is pivotally sleeved on the heat collecting tube 3. The pivoting frame 7 fixed on the photovoltaic panel 4 is rotatably sleeved on the heat collecting tube 3, and the heat collecting tube 3 is fixed with the base frame 1, so that the photovoltaic panel 4 is indirectly connected with the base frame 1 in a rotating manner.

Support bearings may be provided between the pivoting frame 7 and the heat collecting tube 3 to reduce friction.

The synchronous gear 5 is directly fixed on the pivoting frame 7 instead of the photovoltaic panel 4, and the synchronous gear 5 is indirectly fixed with the photovoltaic panel 4 because the pivoting frame 7 is fixed with the photovoltaic panel 4. The synchronous gear 5 drives the pivot frame 7 to rotate, and the pivot frame 7 drives the photovoltaic panel 4 to rotate relative to the base frame 1 and the heat collecting tube 3. The six synchronous gears 5 are respectively arranged coaxially with the six heat collecting pipes 3.

As already described above, the outer plate surface of the photovoltaic plate 4 facing away from the heat collecting tube 3 is a photovoltaic working surface capable of receiving sunlight for power generation, and the purpose of the photovoltaic working surface is to generate power when the photovoltaic plate 4 rotates to the light facing surface of the heat collecting tube 3. When photovoltaic board 4 rotated to 3 shady surface positions of thermal-collecting tube, thermal-collecting tube 3 can not shelter from photovoltaic board 4 completely, still had some sunshine to shoot the interior face of photovoltaic board 4 from the thermal-collecting tube lateral part, for utilizing this part sunshine, we also can set up the interior face of photovoltaic board 4 into the photovoltaic working face equally, and the inside and outside face of photovoltaic board 4 all can be the photovoltaic working face promptly.

In order to maximize the light receiving areas of the photovoltaic panels 4 and the light reflecting panels 8, it is preferable that the width (linear width) of each photovoltaic panel 3 and each light reflecting panel 8 is as close as possible to the distance between two adjacent heat collecting tubes (tube axes). Thus, in the photovoltaic mode, at noon, the six photovoltaic panels 4 can be rotated to the same plane and are closely connected in sequence, fully receiving all the sunlight emitted to the device, as shown in fig. 1; in the photothermal mode, at noon, the six light reflecting plates on the six photovoltaic panels 4 rotate to the other one in the same plane and are sequentially and tightly connected to fully reflect all the sunlight in the gaps of the heat collecting tubes, as shown in fig. 2.

It should be noted that the photovoltaic panel 4 may also be arranged on the side of only one or two of the heat collecting tubes 3, and the photovoltaic panel 4 does not need to be arranged on the side of each heat collecting tube 3.

Example two:

fig. 6 and 7 show a second preferred embodiment of the photovoltaic-thermal device of the present application, which is substantially the same as the first embodiment except that: the heat collecting tube 3 is rotatably connected (instead of being fixedly connected in the first embodiment) on the base frame 1, and the photovoltaic panel 4 and the heat collecting tube 3 in the same photovoltaic-photothermal unit are fixedly connected with each other through the connecting frame 9. When the photovoltaic panel 4 rotates on the base frame 1, the heat collecting tube 3 fixed with the photovoltaic panel 4 also rotates along with the photovoltaic panel. Naturally, when the heat collecting tube 3 rotates on the base frame 1, the photovoltaic panel 4 fixed with the heat collecting tube 3 also rotates along with the heat collecting tube 3.

The rotary connection structure of the heat collecting tube 3 and the base frame 1 is specifically as follows: the cavity wall of the water flowing cavity 2 is provided with a heat collecting pipe front inserting hole, the base frame 1 is provided with a heat collecting pipe rear inserting hole, and two ends of the heat collecting pipe 3 are respectively inserted in the heat collecting pipe front inserting hole and the heat collecting pipe rear inserting hole in a pivoting manner. Because the water cavity 2 is fixed with the base frame 1, the relative position of the front insertion hole of the heat collecting tube on the cavity wall of the water cavity 2 and the base frame 1 is fixed, and the heat collecting tube 3 which is pivotally inserted in the front insertion hole of the heat collecting tube can rotate (rotate) around the tube axis of the heat collecting tube relative to the base frame 1.

The heat collecting tube 3 and the photovoltaic panel 4 in the same photovoltaic-photothermal unit are fixed to each other and can rotate around the same rotation axis (tube axis of the heat collecting tube) on the base frame 1, and the photovoltaic panel 4 can be selectively positioned on the backlight surface or the light facing surface of the heat collecting tube 3 by only adjusting the rotation angle of the heat collecting tube 3 and the photovoltaic panel 4.

In order to facilitate the rotation of the photovoltaic panel 4 and the heat collecting tube 3, the driving device is configured in the embodiment, and is in transmission connection with the heat collecting tube 3 to drive the heat collecting tube 3 to rotate. The drive device also includes: a plurality of synchronous gears 5, a plurality of intermediate gears and a miniature motor. A plurality of synchronous gears 5 are respectively coaxially and fixedly sleeved on each heat collecting pipe 3. The carrier gear is meshed with the synchronous gear 5. The motor can directly drive any one of the plurality of synchronous gears 5 and the plurality of carrier gears, so that the linkage of all the synchronous gears 5 and all the carrier gears can be realized, and all the heat collecting pipes 3 and all the photovoltaic panels 4 are positioned at any preset position.

In the first embodiment, the heat collecting tube 3 is fixed to the base frame 1, and the photovoltaic panel 4 is rotatably connected to the heat collecting tube 3. In the second embodiment, the heat collecting tube 3 is rotatably connected with the base frame 1, and the photovoltaic panel 4 is fixed with the heat collecting tube 3. The foregoing two ways can achieve switching between photovoltaic and photothermal operating modes, which is preferred in the first embodiment because:

the heat collecting pipe 3 can be generally divided into two structural forms of water flowing and water non-flowing, no matter the water flowing heat collecting pipe or the water non-flowing heat collecting pipe, the end part of the heat collecting pipe is required to be inserted into the water flowing cavity 2, and strict sealing is required to be realized in order to prevent water from flowing out of the water flowing cavity and the water non-flowing heat collecting pipe in a plug-in matching mode. If the fixed heat collecting pipe structure is adopted, the sealing of the splicing part of the heat collecting pipe and the water cavity is static sealing, and water leakage is generally avoided. However, if the rotary heat collecting pipe structure of the second embodiment is adopted, the following problems exist:

for the heat collecting pipe with water leakage, as shown in fig. 6, the insertion joint of the heat collecting pipe and the water leakage cavity is in dynamic seal, and if the heat collecting pipe is rotated frequently, the dynamic seal is easily damaged, which leads to water leakage.

The structure of the heat collecting pipe without water leakage is shown in fig. 7, and the heat collecting pipe comprises an inner pipe 301 and an outer pipe 302 which are coaxially fixed, and a hollow interlayer between the inner pipe and the outer pipe is vacuum. The outer wall of the inner tube is coated with a heat absorbing coating, and a heat conducting rod 303 made of metal and an aluminum foil (not shown) fixedly connected with the heat conducting rod are arranged in the inner tube. The aluminum foil is arranged in a manner of being attached to the inner wall of the inner pipe, and one end of the heat conducting rod (called as the extending end of the heat conducting rod) extends out of the inner pipe and is used for conducting heat to water in the water tank. If the inner tube, the outer tube and one end of the heat conducting rod of the heat collecting tube are all inserted into the water tank to be contacted with water, the problem that the dynamic seal is damaged and water leaks after the heat collecting tube rotates for a plurality of times is also solved. Therefore, for the heat collecting tube without water leakage shown in fig. 7, we propose that only the extending end of the heat conducting rod 303 of the heat collecting tube is "sealed and inserted" into the water leakage box 2 and fixed with the water leakage box 2, and the vacuum tube body formed by the inner tube and the outer tube is not inserted into the water leakage box 2 and is not fixed with the water leakage box 2. The sealing insertion means that the extending end of the heat conducting rod is inserted into the water tank and the joint of the heat conducting rod and the water tank is watertight, and the sealing insertion can be realized by adopting the two structural forms: 1) the extending end of the heat conducting rod inserted into the water tank 2 is directly contacted with the water in the water tank, and the sealing ring is used for keeping the sealing of the inserting position of the extending end of the heat conducting rod and the water tank 2, so as to prevent water leakage. 2) As shown in figure 7, the heat conduction sleeve 10 fixed in the water tank is in indirect contact with water in the water tank for heat conduction, namely, the wall of the water tank is provided with a through hole coaxially arranged with a front plug hole of a heat conduction rod at the water tank, the open end of the heat conduction sleeve 10 is coaxially fixed with the through hole, the extending end of the heat conduction rod is inserted into the heat conduction sleeve, and the heat conduction sleeve seals and seals the through hole and is in direct contact with the water in the water tank. When the vacuum tube body is in work, the heat conducting rod is fixed, and only the vacuum tube body formed by the inner tube and the outer tube is rotated, so that the water leakage problem can be avoided. However, when the aluminum foil fixed to the metal heat conduction rod is used, the aluminum foil may be deformed after a long-term use and may not maintain good contact with the inner wall of the inner tube. The heat conducting rod 303 in fig. 7 is a heat pipe in which a phase change material is encapsulated.

From the above, for the heat collecting tube without water leakage shown in fig. 7, the heat conducting rod and the water leakage box 2 can be fixed in a sealing manner, the vacuum tube body rotates, and the photovoltaic plate and the vacuum tube body are fixedly connected and rotate along with the vacuum tube, so that the photovoltaic-photothermal switching operation is realized, and meanwhile, water leakage is also prevented. As described above, the water tank 2 and the base frame 1 are respectively provided with the heat collecting tube front insertion hole (coaxial with the through hole) and the heat collecting tube rear insertion hole, so that both ends of the vacuum tube body can be respectively inserted into the heat collecting tube front insertion hole and the heat collecting tube rear insertion hole in a pivoting manner, and the vacuum tube body can be pivotally connected with the base frame 1.

Certainly, the heat collecting tube inserting holes are not arranged on the wall of the water tank 2, but the heat collecting tube front inserting holes and the heat collecting tube rear inserting holes are all arranged on the base frame 1, and two ends of the vacuum tube body are respectively inserted into the heat collecting tube front inserting holes and the heat collecting tube rear inserting holes of the base frame 1 in a pivoting manner.

Example three:

fig. 8 shows a third preferred embodiment of the photovoltaic-thermal device of the present application, which is also substantially the same as the first embodiment, except that: this embodiment is fixed connection a reflector panel 8 in photovoltaic board 4 towards that side of thermal-collecting tube 3, and reflector panel 8 has the reflection of light face towards thermal-collecting tube 3.

When the photovoltaic-photothermal device is in a photothermal working mode, the photovoltaic panel 4 and the reflector 8 fixed on the photovoltaic panel are both turned to the backlight side of the heat collecting tube 3, at this time, the reflecting surface of the reflector 8 faces sunlight, and the sunlight rays incident from the side part of the heat collecting tube 3 can be emitted to the reflecting surface of the reflector 8 and projected to the corresponding heat collecting tube 3 after being reflected by the reflecting surface, so that the light receiving area of the heat collecting tube 3 is increased, and the heat collecting effect is enhanced. In this case, the photovoltaic working surface of the photovoltaic panel 4 is completely exposed to the environment and is easy to receive dust in the air to be polluted, and the photovoltaic conversion efficiency of the photovoltaic panel 4 is obviously reduced after a long time; the reflecting surface of the reflector 8 has certain concealment, is not easy to be polluted, and the reflecting efficiency is not reduced for a long time.

When the photovoltaic-photothermal device is in a photovoltaic working mode, the reflecting surface of the reflecting plate is exposed in the environment and is easy to receive dust in the air, and the reflecting efficiency of the reflecting plate is obviously reduced after a long time; the photovoltaic working surface of the photovoltaic panel 4 has certain concealment, is not easy to be polluted, and the photovoltaic conversion efficiency of the photovoltaic panel is not reduced for a long time.

When the photovoltaic-photothermal device is actually applied, the photovoltaic mode and the photothermal mode of the photovoltaic-photothermal device are frequently converted, and the photovoltaic panel and the reflector panel are exposed to light in turn, so that the reduction speed of the photovoltaic conversion efficiency of the photovoltaic panel and the reduction speed of the reflection efficiency of the reflector panel are reduced, a user does not need to frequently clean the photovoltaic working surface and the reflection surface, and the maintenance frequency is low.

In this embodiment, the light reflecting surface of the light reflecting plate is an inward concave surface.

Example four:

fig. 9 shows a fourth preferred embodiment of the photovoltaic-thermal device of the present application, which has substantially the same structure as the third embodiment, except that: the reflector 8 and the photovoltaic panel 4 are both cambered plates arranged around the heat collecting tube 3.

The reflector 8 and the photovoltaic panel 4 are both arc panels and are arranged in close proximity.

The advantage of design like this has reduced the straight line width of reflector panel 8 and photovoltaic board 4 in the radial direction of thermal-collecting tube 3 to make each thermal-collecting tube 3 can be inseparabler (the booth) arrange, and then be favorable to reducing the size of this photovoltaic-light and heat device.

Example five:

fig. 10 shows a fifth preferred embodiment of the photovoltaic-thermal device of the present application, which is also substantially the same as the first embodiment, except that: the photovoltaic panel 4 is a cambered panel arranged around the heat collecting tube 3.

The advantage of design like this for each thermal-collecting tube 3 can be inseparabler (the booth) arrange, and then be favorable to reducing the size of this photovoltaic-light and heat device, promote the whole photic area of device.

In order to further reduce the size of the photovoltaic-photothermal device, in the embodiment, the photovoltaic panel 4 of the arc panel structure and the heat collecting tube 3 are coaxially arranged at a small distance, and even the photovoltaic panel 4 and the heat collecting tube 3 can be completely attached together.

In this embodiment, the photovoltaic panel 4 of cambered plate structure, its face (for the evagination cambered surface) that deviates from thermal-collecting tube 3 one side all is the photovoltaic working face, and the area of photovoltaic working face equals that the photovoltaic panel is the face area of thermal-collecting tube that one side of back of the board.

The above are exemplary embodiments of the present application only, and are not intended to limit the scope of the present application, which is defined by the appended claims.

Claims (19)

1. A photovoltaic-photothermal device comprising:

a base frame, and

the heat collecting pipe is fixedly connected with the base frame;

the solar collector tube is characterized by further comprising a photovoltaic plate which is arranged at the radial outer side part of the collector tube and can rotate around the collector tube, and the photovoltaic plate is provided with a photovoltaic working surface which deviates from the collector tube.

2. The photovoltaic-photothermal device according to claim 1 wherein said photovoltaic panel is disposed in parallel on a radially outer side of said collector tube.

3. The photovoltaic-photothermal device according to claim 2, wherein at least two of the heat collecting tubes are provided, at least two of the photovoltaic panels are provided, each of the heat collecting tubes are arranged in parallel at intervals, each of the photovoltaic panels is arranged in parallel at a radial outer side portion of the corresponding heat collecting tube and can rotate around the corresponding heat collecting tube, and a distance between each of the photovoltaic panels and the corresponding heat collecting tube is smaller than a distance between the corresponding heat collecting tube and an adjacent heat collecting tube.

4. The pv-photothermal device according to claim 3 wherein a radially outer portion of each of said collector tubes is provided in parallel with said pv panel rotatable about the tube axis of said collector tube.

5. The photovoltaic-thermal device according to claim 3 or 4, wherein each of the thermal-collecting tubes is arranged in the same plane.

6. The photovoltaic-thermal device of claim 5, wherein each of the thermal-collecting tubes is arranged equidistantly.

7. The pv-photothermal device according to claim 6 wherein the width of each pv panel is equal to the distance between two adjacent thermal collector tubes.

8. The photovoltaic-photothermal device according to claim 1, wherein at least two of said heat collecting tubes are provided, at least two of said photovoltaic panels are provided, each of said photovoltaic panels is disposed at a radially outer portion of a corresponding one of said heat collecting tubes, and a rotation path of at least one of said photovoltaic panels passes through a space between corresponding adjacent two of said heat collecting tubes.

9. The photovoltaic-thermal device of claim 1, wherein the photovoltaic panel is pivotally connected to the collector tube.

10. The pv-photothermal device according to claim 9 wherein the pv panel is fixedly connected to a pivoting frame pivotally mounted on the collector tube.

11. The pv-photothermal device according to claim 10 wherein a gear coaxially sleeved outside said heat collecting tube is fixedly connected to said pivotal frame, and a motor connected to said gear for driving said gear to rotate is mounted on said base frame.

12. The photovoltaic-photothermal device according to claim 1, wherein a water-passing cavity is fixedly arranged on the base frame, and one end of the heat collecting tube is fixedly inserted into the water-passing cavity in a sealing manner.

13. The pv-photothermal device according to claim 1 wherein a reflector is fixedly attached to the side of the pv facing the collector tube, the reflector having a reflective surface facing the collector tube.

14. The photovoltaic-thermal device according to claim 13, wherein the light-reflecting surface is concavely curved.

15. The photovoltaic-thermal device of claim 14, wherein the light-reflecting surface is concave.

16. The pv-photothermal device according to claim 15 wherein said pv panel and said reflector panel are both arc panels disposed around said collector tube and said pv panel and said reflector panel are disposed in abutting relationship.

17. The photovoltaic-photothermal device of claim 1 wherein said photovoltaic working surface is convexly curved.

18. The photovoltaic-thermal device of claim 17, wherein the photovoltaic panel is a curved panel disposed around the collector tube.

19. The pv-photothermal device of claim 18 wherein said pv panel is disposed against said collector tube.

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