Vacuum photothermal conversion tube of solar water heater

Abstract

The utility model discloses a vacuum photo-thermal conversion tube of a solar water heater, which relates to the technical field of vacuum photo-thermal conversion tubes, solves the technical problems in the prior art that the temperature in the tube is higher during idle, potential safety hazards are easily generated, the tube body is fragile and not resistant to extreme weather, and high energy waste is caused, and comprises an inner-layer tube and an outer-layer tube, the inner-layer pipe is fixedly sleeved on the inner side of the outer-layer pipe, a cavity is formed between the inner-layer pipe and the outer-layer pipe, gas is exhausted from the cavity to form a vacuum cavity, and an additional layer is arranged on the outer wall surface of the outer-layer pipe. The utilization rate of solar rays can be improved, and the sunlight can be reflected in the non-use season; the vibration reduction layer can effectively prevent the vacuum tube from being damaged by extreme weather such as thunderstorm, hail and the like, and the durability of equipment is improved; the protective layer further prolongs the service life of the equipment; an elastic sealing ring is arranged outside the outer-layer pipe, so that the direction of the additional layer is convenient to adjust.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum heat conversion tubes, in particular to a vacuum light-heat conversion tube for a solar water heater. Background Art

[0002] The utility model relates to a technical field in which a solar water heater is a device that utilizes solar energy to heat water. It utilizes a solar panel to convert solar energy into electrical energy, and then heats water through the electrical energy, thereby providing hot water supply.

[0003] As a long-standing device, solar water heaters have been widely used in industry, agriculture and the lives of urban and rural residents. It has many advantages, such as strong practicality, energy saving and environmental protection, and high economic value. In the industrial field, solar water heaters can be used to heat a large amount of hot water required in industrial production, reduce production costs and improve efficiency. In agriculture, solar water heaters can be used for greenhouse planting and animal husbandry, providing a stable supply of hot water for agricultural production and promoting the improvement of output and quality. In the lives of urban and rural residents, solar water heaters can replace traditional gas water heaters or electric water heaters, saving energy and protecting the environment, and reducing the cost of living for residents.

[0004] The general structure of a solar water heater is mainly composed of an equipment bracket, a vacuum lighting tube and a water storage tank. The equipment bracket is used to support and fix the entire system to ensure that it is firmly installed in a suitable position. The vacuum lighting tube is the core component, which consists of a glass outer tube and an inner tube, and a vacuum layer is formed between the two, which has good thermal insulation performance. Solar energy enters the inner tube through the glass outer tube and converts light energy into heat energy. The water storage tank is located below the system and is used to store heated hot water, which users can use at any time. The working principle is to use the vacuum lighting tube to convert the received solar energy into heat energy, and then transfer it to the flowing liquid (such as water) to increase the water temperature, thereby realizing the process of using solar energy to heat water and provide users with hot water supply. This structure is simple and efficient, environmentally friendly and energy-saving, and has gradually become the first choice for people's home hot water supply.

[0005] At present, there are some technical problems that need to be solved in solar water heaters: First, because solar water heaters are frequently used in winter and may be idle in other seasons, the sunlight is still shining when the system stops working, causing the temperature in the system to rise. This may lead to high temperature problems, such as the temperature can reach 100℃ when there is water, and even exceed 200℃ when there is no water. Long-term high temperature retention will cause damage to the equipment, such as burst pipes and scale accumulation.

[0006] Secondly, the materials used to make the solar water heater's daylighting vacuum tubes are fragile and have low strength. They are easily broken in extreme weather such as thunderstorms and hail, and are difficult to repair, causing losses to users.

[0007] In addition, the vacuum tube has a double-layer structure. During actual operation, only the inner layer is the effective lighting area, and the light from other transparent parts is wasted, reducing the working efficiency of the system.

[0008] To solve these problems, technological improvements and innovations are needed to improve the performance and safety of solar water heaters and enhance the efficiency of the system to better meet user needs and promote the use and development of clean energy. Summary of the invention

[0009] In view of the deficiencies of the prior art, the utility model provides a solar water heater vacuum photothermal conversion tube, which solves the technical problems of the prior art such as high temperature inside the tube during idle period, which easily causes safety hazards, fragile tube body, inability to withstand extreme weather, and high energy waste.

[0010] To achieve the above purpose, the utility model is implemented through the following technical solutions: a solar water heater vacuum photothermal conversion tube, including an inner tube and an outer tube, characterized in that the inner tube is fixedly sleeved on the inner side of the outer tube, the surface of the inner tube is provided with a coating that can absorb sunlight and convert it into heat energy, the inner tube flows water and is connected to a water storage tank, a cavity is formed between the inner tube and the outer tube, gas is discharged from the cavity to form a vacuum cavity, and an additional layer is provided on the outer wall of the outer tube. This vacuum pipe can not only improve the utilization rate of sunlight, but also facilitate the work of seasonal change operations twice a year and play a certain protective role for Shanghai Bell.

[0011] Preferably, the additional layer is a double-sided light-reflecting film, which covers one side of the outer wall of the outer tube to form an attachment with a semicircular interface. It is actually arranged slightly smaller than half of the circumference. When used in winter, it can reflect the transmitted sunlight back to the inner tube, thereby improving the utilization rate of light energy. In summer, the convex surface is facing upward to reflect the sunlight, so as to achieve the transition from winter to summer intermittent operation.

[0012] Preferably, the additional layer adopts a multi-layer laminate structure, the inner side of the additional layer is an adhesive layer, the outer side of the adhesive layer is an inner reflective layer, the outer side of the inner reflective layer is a vibration-damping layer, the outer side of the vibration-damping layer is an outer reflective layer, and the outer reflective layer has an outer protective layer, which can be made by an adhesive process, a paint spraying process, a powder injection process, a vacuum coating process, a long hoop fastening process, etc.

[0013] Preferably, the adhesive layer is a transparent layer, and is made of adhesive materials such as adhesive and thermosetting resin.

[0014] Preferably, the inner reflection layer and the outer reflection layer are respectively concave and convex total light reflection mirror surfaces, and are made of metal foil material or coating.

[0015] Preferably, the vibration-damping layer has high rigidity and toughness, and is a semicircular thin plate, which can be made of materials such as aluminum alloy, carbon steel plate (skin), stainless steel plate, bakelite resin plate and organic fiberglass, so the device can effectively prevent and reduce the occurrence of disasters such as vacuum tube breakage and damage caused by thunderstorm hail attacks.

[0016] Preferably, the protective layer has the properties of anti-oxidation, corrosion-resistance and resistance to direct sunlight.

[0017] Preferably, an elastic sealing ring is arranged outside the outer tube, so that the photothermal conversion tube and the water storage tank can be conveniently plugged in and rotated freely, so as to adjust the direction of the additional layer.

[0018] Beneficial Effects

[0019] The utility model provides a solar water heater vacuum photothermal conversion tube. The additional layer of the utility model adopts a semicircular double-sided light total reflection film to achieve seasonal operation twice a year, which can improve the utilization rate of sunlight and reflect sunlight in the season when not in use, to achieve seasonal operation twice a year, and at the same time has a protective effect; the additional layer adopts a multi-layer laminated structure and can be processed by different processes; the vibration reduction layer has high rigidity and toughness, can effectively prevent damage to the vacuum tube by extreme weather such as thunderstorms and hail, and improves the durability of the equipment; the protective layer has antioxidant, corrosion-resistant and anti-sunlight direct radiation properties, further extending the service life of the equipment; an elastic sealing ring is arranged outside the outer tube, which is convenient for the photothermal conversion tube and the water tank to be plugged in and rotated freely, and it is convenient to adjust the direction of the additional layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the axial structure of the vacuum photothermal conversion tube of the solar water heater described in the utility model.

[0021] Figure 2 It is a schematic diagram of the radial structure of the vacuum photothermal conversion tube of the solar water heater described in the utility model.

[0022] Figure 3 It is a schematic diagram of the installation structure of the vacuum photothermal conversion tube of the solar water heater described in the utility model.

[0023] Figure 4 It is a schematic diagram of the heat absorption working structure of the vacuum photothermal conversion tube of the solar water heater described in the utility model.

[0024] Figure 5 It is a schematic diagram of the protection working structure of the vacuum photothermal conversion tube of the solar water heater described in the utility model.

[0025] In the figure: 1, inner tube; 2, outer tube; 3, cavity; 4, adhesive layer; 5, inner reflection layer; 6, vibration reduction layer; 7, outer reflection layer; 8, protective layer; 9, elastic sealing ring; DETAILED DESCRIPTION

[0026] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in combination with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, rather than all the embodiments. The detailed description is as follows.

[0027] See also Figure 1-5 The utility model provides a technical solution: a solar water heater vacuum photothermal conversion tube, which solves the technical problems of the prior art that the temperature inside the tube is high during idle periods, which easily causes safety hazards, the tube body is fragile and cannot withstand extreme weather, and there is high energy waste.

[0028] To achieve the above purpose, the utility model is implemented through the following technical scheme: a solar water heater vacuum photothermal conversion tube, comprising an inner tube 1 and an outer tube 2, characterized in that the inner tube 1 is fixedly sleeved on the inner side of the outer tube 2, the surface of the inner tube 1 is provided with a coating that can absorb sunlight and convert it into heat energy, the inner tube 1 flows water and is connected to a water storage tank, a cavity 3 is formed between the inner tube 1 and the outer tube 2, gas is discharged from the cavity 3 to form a vacuum cavity 3, and an additional layer is provided on the outer wall of the outer tube 2. This vacuum pipe fitting can not only improve the utilization rate of sunlight, but also facilitate the work of seasonal change operations twice a year and play a certain protective role for Shanghai Bell.

[0029] This embodiment is further configured such that the additional layer is a double-sided light total reflection film, and the additional layer covers one side of the outer wall of the outer tube 2, forming an attachment body with an interface of a semicircular ring, which is actually arranged slightly smaller than half of the circumference. When used in winter, it can reflect the transmitted sunlight back to the inner tube 1, thereby improving the utilization rate of light energy. In summer, the convex surface is turned upward to reflect the sunlight, so as to achieve the conversion of intermittent operation in winter and summer.

[0030] This embodiment is further configured such that the additional layer adopts a multi-layer laminate structure, the inner side of the additional layer is an adhesive layer 4, the outer side of the adhesive layer 4 is an inner reflective layer 5, the outer side of the inner reflective layer 5 is a vibration-damping layer 6, the outer side of the vibration-damping layer 6 is an outer reflective layer 7, and the outer side of the outer reflective layer 7 is a protective layer 8. The additional layer can be processed by an adhesive method, a paint spraying method, a powder injection method, a vacuum coating method, a long hoop fastening method, etc.

[0031] The present embodiment is further configured such that the adhesive layer 4 is a transparent layer, and is made of adhesive material such as adhesive and thermosetting resin.

[0032] The present embodiment is further configured such that the inner reflection layer 5 and the outer reflection layer 7 are respectively concave and convex total light reflection mirror surfaces, and are made of metal foil material or coating.

[0033] The present embodiment is further configured such that the vibration-damping layer 6 has high rigidity and toughness, and is a semicircular thin plate, which can be made of materials such as aluminum alloy, carbon steel plate (skin), stainless steel plate strip, bakelite resin plate and organic fiberglass, so the device can effectively prevent and reduce the occurrence of disaster accidents such as vacuum tube breakage caused by thunderstorm hail attacks.

[0034] The present embodiment is further configured such that the protective layer 8 has the properties of anti-oxidation, corrosion resistance and resistance to direct sunlight.

[0035] The present embodiment is further configured such that an elastic sealing ring 9 is provided outside the outer tube 2, so that the photothermal conversion tube and the water storage tank can be conveniently plugged in and rotated freely, so as to adjust the direction of the additional layer.

[0036] The detailed connection means are well known in the art; Figure 1-5 As shown, installation: First, install the solar water heater system, ensuring that the connection between the inner tube 1 and the outer tube 2 is correct and firm. Ensure that the concave surface of the additional layer faces the direction of sunlight.

[0037] Connect the water pipe: Connect the circulating water pipe to the inner layer pipe 1 and ensure that it is connected to the water storage tank to circulate water.

[0038] Startup: When sunlight shines on the inner tube 1 and the additional layer, the additional layer reflects the sunlight onto the inner tube 1 and converts it into heat energy, which is then transferred to the water in the inner tube 1 to heat it.

[0039] The hot water flows in the inner tube 1 to the external water storage tank, while the vacuum chamber 3 in the outer tube 2 can improve the heat preservation effect and ensure that the water temperature is maintained for a longer time;

[0040] Depending on the season, when heat collection is not needed, the outer tube 2 can be rotated so that the convex surface of the additional layer faces the sunlight to increase the light reflectivity and protect the conversion tube.

[0041] Maintenance: Clean the surface of the additional layer regularly to ensure that its ability to absorb sunlight is not affected. At the same time, check whether the pipe connections are tight to ensure the normal operation of the system.

[0042] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A solar water heater vacuum photothermal conversion tube, comprising an inner tube (1) and an outer tube (2), characterized in that: The inner tube (1) is fixedly mounted on the inner side of the outer tube (2); a cavity (3) is formed between the inner tube (1) and the outer tube (2); gas is exhausted from the cavity (3) to form a vacuum chamber (3); an additional layer is provided on the outer wall of the outer tube (2); the additional layer is a double-sided total light reflection film; the additional layer covers one side of the outer wall of the outer tube (2); the additional layer adopts a multi-layer laminate structure; the inner side of the additional layer is an adhesive layer (4); The adhesive layer (4) is provided with an inner reflection layer (5) outside, the inner reflection layer (5) is provided with a vibration reduction layer (6) outside, the vibration reduction layer (6) is provided with an outer reflection layer (7) outside, the outer reflection layer (7) is provided with a protective layer (8) outside, the adhesive layer (4) is a transparent layer, the inner reflection layer (5) and the outer reflection layer (7) are respectively concave and convex light total reflection mirror surfaces, the vibration reduction layer (6) has high rigidity and toughness, and the protective layer (8) has the properties of anti-oxidation, corrosion resistance and resistance to direct sunlight.

2. The solar water heater vacuum photothermal conversion tube according to claim 1 is characterized in that An elastic sealing ring (9) is arranged outside the outer tube (2).

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