Unpowered phase change heat storage solar thermal collector

Abstract

The utility model relates to the technical field of solar heat collection and heat exchange equipment, in particular to an unpowered phase change heat storage solar heat collector which comprises a metal support and a water supplementing tank, a plurality of solar vacuum heat collection pipes are fixedly installed in the metal support, and a header body is fixedly connected to the surface of the upper end of the metal support. A header shell is fixedly connected to the outer portion of the header body, a header main water channel is fixedly installed in the header shell, the header main water channel is sleeved with a heat preservation layer, and a heat exchange flow channel and a header water supplementing channel are fixedly installed in the header main water channel. According to the utility model, the phase change heat storage technology is combined with the solar heat collection technology, so that the all-in-one machine has higher heat collection, heat exchange and heat storage capacities, the whole all-in-one machine has better pressure bearing capacity, the heat utilization time is prolonged, the use efficiency of heat energy is improved, and the practicability, the energy-saving property, the economical efficiency and the like are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solar heat collection and heat exchange equipment, in particular to a non-powered phase-change heat storage solar heat collector. Background Art

[0002] With the development of society, people's daily energy needs are increasing day by day, and since the use of fossil energy, the global environment has been deteriorating. In order to solve the earth's energy crisis and environmental problems, countries around the world have begun to study and use new energy sources to reduce carbon emissions and promote green and low-carbon development. Solar energy, as a relatively green and renewable new energy source, has been used as early as the 1960s and further applied to photovoltaic power generation. At present, solar energy is generally used to generate electricity or provide energy for water heaters. Solar collector is a device that converts solar energy into thermal energy. It is also one of the important components of the heat energy source required for water heaters. The main function of the collector is to concentrate the scattered solar energy into thermal energy and transfer the thermal energy to the required water tank through the medium.

[0003] In the prior art, for example, the pressurized heat exchange vacuum tube solar collector proposed in patent application number "CN213040763U" exchanges heat between a header and the heat exchange tubes, and a water pump connects the water tank and the circulation pipe to achieve circulating heat supply, thereby improving the heat exchange efficiency. The header is placed horizontally and the stainless steel straight heat exchange tubes are placed vertically to improve the pressure bearing capacity.

[0004] However, in the above patent application, although the heat exchange efficiency is improved to a certain extent, the improvement in the efficiency of heat energy use is small, the pressure bearing capacity is not very high, and the heat collection area is small, the heat collection efficiency is low, and additional kinetic energy is required. There is not much advantage in practicality and economy. Utility Model Content

[0005] The purpose of the present invention is to provide a non-powered phase-change heat storage solar thermal collector to solve the problems raised in the above background technology.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A non-powered phase-change heat storage solar collector comprises a metal bracket and a water supply tank, wherein a plurality of solar vacuum heat collecting tubes are fixedly installed inside the metal bracket, and a header body is fixedly connected to the upper end surface of the metal bracket;

[0008] The outside of the header body is fixedly connected to the header shell, the inside of the header shell is fixedly installed with the header main water channel, the outside of the header main water channel is covered with an insulation layer, the inside of the header main water channel is fixedly installed with a heat exchange flow channel and a header water replenishment channel, and the bottom of the header body is provided with a plurality of holes that match the solar vacuum collector tubes.

[0009] Preferably, a first special silicone variable diameter seal and an internal thread plug are fixedly installed at one end of the heat exchange channel, a second special silicone variable diameter seal is fixedly connected to the other end of the heat exchange channel, and the interior of the heat exchange channel is filled with phase change heat storage material.

[0010] Preferably, a plurality of fixing bolts are inserted into the outer wall of the header body, the top of the solar vacuum heat collecting tube is fixedly connected to the hole at the bottom of the header body, and the interior of the solar vacuum heat collecting tube is filled with high temperature medium.

[0011] Preferably, small holes are provided on the heat exchange channel and the header water supply channel.

[0012] Preferably, one end of the header water replenishment channel is fixedly connected to a return pipe, and the other end of the header water replenishment channel is fixedly connected to a water supply pipe.

[0013] Preferably, a first silicone soft connector, a stainless steel inner thread connector and a second silicone soft connector are fixedly connected between the two junction box bodies.

[0014] Beneficial effects of the utility model:

[0015] The utility model realizes the combination of phase change heat storage material and collector, which can effectively improve the efficiency of heat energy utilization, effectively control the water temperature to prevent the water temperature from being too high, and can provide hot water for a longer time after the sun is gone. The metal bracket is used to support the junction box body and the solar vacuum heat collection tube, which greatly improves the pressure bearing capacity and can withstand a pressure of at least 20kg. The solar collector can be used alone or in series to meet various usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, it is possible for a person skilled in the art to derive other drawings based on these drawings without inventive effort.

[0017] Figure 1 This is a schematic diagram of the structure of an unpowered phase-change thermal storage solar collector;

[0018] Figure 2 To follow Figure 1 Schematic diagram of the cross section along line AA;

[0019] Figure 3 This is a diagram of an unpowered phase change thermal storage solar collector system;

[0020] Figure 4 for Figure 3 Schematic diagram of part of the structure of the unpowered phase change thermal storage solar collector system.

[0021] The reference numerals in the figures are as follows:

[0022] 1. Metal bracket; 2. Solar vacuum collector tube; 3. Manifold body; 4. Phase change heat storage material; 5. Fixing bolts; 6. Manifold shell; 7. Heat exchange flow channel; 8. Manifold main water channel; 9. Insulation layer; 10. Manifold water supply channel; 11. Internal thread plug; 12. First special silicone reducer seal; 13. First silicone flexible connector; 14. Stainless steel internal thread joint; 15. Second silicone flexible connector; 16. Water supply tank; 17. Second special silicone reducer seal; 18. Return pipe; 19. Water supply pipe. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] A non-powered phase change thermal storage solar collector, such as Figures 1-4 As shown, it includes a metal bracket 1 and a water supply tank 16. Several solar vacuum heat collecting tubes 2 are fixedly installed inside the metal bracket 1. The upper end surface of the metal bracket 1 is fixedly connected to the header body 3. The outside of the header body 3 is fixedly connected to the header shell 6. The header main water channel 8 is fixedly installed inside the header shell 6. The outside of the header main water channel 8 is provided with an insulation layer 9. The inside of the header main water channel 8 is fixedly provided with a heat exchange flow channel 7 and a header water supply channel 10. The bottom of the header body 3 is provided with a plurality of holes that match the solar vacuum heat collecting tubes 2.

[0025] Among them, the insulation layer 9 can wrap the heat exchange flow channel 7, the main water channel 8 of the header and the water supply channel 10 of the header. The outside of the header body 3 is wrapped and sealed by the header shell 6. Except for the 10 cm protrusions at both ends of the heat exchange flow channel 7 on the side of the header body 3, the rest are all detachable and integrated seals. The solar vacuum heat collecting tube 2 is mainly made of glass, and multiple tubes are placed obliquely on the metal bracket 1. The top of the solar vacuum heat collecting tube 2 is installed in the hole at the bottom of the header body 3 for fixation, and is encapsulated with a leak-proof gasket. Multiple tubes are arranged in parallel and obliquely on the metal bracket 1, which increases the light receiving area and bearing capacity. The insulation layer 9 uses polyurethane integral foaming for thermal insulation, with a thickness of 60 mm and a density of 45 kg / m 3, the thermal insulation effect is better, the metal bracket 1 is a galvanized plate spray-bent thickened bracket with a thickness of 1.8mm, and the solar vacuum collector tube 2 is a corrugated tube, which is easy to install and replaceable. The material of the solar vacuum collector tube 2 is stainless steel 316L and has a large diameter, large heat exchange flow, low resistance, large heat exchange area, flexible series and parallel connection, and longer service life.

[0026] A first special silicone reducer seal 12 and an inner thread plug 11 are fixedly installed at one end of the heat exchange channel 7, and a second special silicone reducer seal 17 is fixedly connected to the other end of the heat exchange channel 7. The interior of the heat exchange channel 7 is filled with phase change heat storage material 4, and a number of fixing bolts 5 are inserted into the outer wall of the header body 3. The top of the solar vacuum heat collecting tube 2 is fixedly connected to the hole at the bottom of the header body 3, and the interior of the solar vacuum heat collecting tube 2 is filled with high-temperature medium. The first special silicone reducer seal 12, the inner thread plug 11 and the second special silicone reducer seal 17 connected at both ends of the heat exchange channel 7 are all detachable seals. The temperature of the phase change heat storage material 4 filled in the heat exchange channel 7 is 50-80°C and is easy to replace. The header body 3 is positioned and fixed by multiple fixing bolts 5 to improve the overall bearing capacity.

[0027] Among them, the phase change thermal storage material 4 is a material with special physical properties. It will undergo phase change when external conditions such as temperature, pressure or chemical composition change. The phase change energy storage technology uses the phase change characteristics of the phase change thermal storage material 4 to convert thermal energy into latent heat and store it, and release it when needed, so as to achieve efficient storage and utilization of energy.

[0028] Small holes are provided on the heat exchange flow channel 7 and the header water supply channel 10 . One end of the header water supply channel 10 is fixedly connected to a return pipe 18 , and the other end of the header water supply channel 10 is fixedly connected to a water supply pipe 19 .

[0029] Specifically, an internal thread plug 11, a first special silicone reducer seal 12 and a second special silicone reducer seal 17 are used for leak-proof sealing. One end of the junction box water supply channel 10 is connected to the water supply pipe 19 and the water tank, and the other end is connected to the return pipe 18. No other power device is required to assist, and the system can achieve stable water supply and heat exchange in circulation by itself.

[0030] A first silicone soft connector 13 , a stainless steel inner thread connector 14 and a second silicone soft connector 15 are fixedly connected between the two header bodies 3 .

[0031] Specifically, multiple unpowered phase-change heat storage solar collectors can be connected by connecting the heat exchange channel 7, the header main water channel 8, and the header water supply channel 10 between the header body 3. The first silicone soft connector 13, the stainless steel inner thread joint 14, and the second silicone soft connector 15 are respectively used between the pipe connection ports for connection and installation, which can be adjusted according to different needs.

[0032] When in use, in the unpowered phase-change thermal storage solar collector, during the daytime, the solar vacuum collector tube 2 generates heat energy to heat the water in the hot water storage tank in the user's home. When the temperature of the hot water storage tank reaches the water temperature, the remaining heat is stored by the phase-change thermal storage material 4. The phase-change storage temperature reaches about 78°C, storing the remaining solar heat energy.

[0033] During the nighttime or water-using period, when the temperature of the hot water storage tank is lower than the water temperature, the heat energy stored in the phase-change thermal storage material 4 is transferred to the hot water storage tank for heating through the external circulation pump of the unpowered phase-change thermal storage solar thermal collector in the form of working medium heat exchange. Through the above operation, the unpowered phase-change thermal storage solar thermal collector can utilize latent heat to store heat, has excellent heat storage potential, releases heat at a constant temperature, and has good thermal conductivity, stable performance, no attenuation for a long time, and is safe and pollution-free. The connected box body 3 uses the phase-change thermal storage material 4 with high specific heat and high heat transfer as the heat storage medium, utilizes the latent heat of the medium to store heat, stores more heat in a limited space, achieves the effect of high energy storage in a small space, and then uses the stored latent heat to release heat at a constant temperature;

[0034] Since the water in the unpowered phase change thermal storage solar collector does not need to be frequently added or replaced, scaling is rare, and the heat collection and heat exchange efficiency will not be attenuated due to scaling.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A non-powered phase-change heat storage solar collector, comprising a metal bracket (1) and a water supply tank (16), characterized in that: A plurality of solar vacuum heat collecting tubes (2) are fixedly installed inside the metal bracket (1), and a header body (3) is fixedly connected to the upper end surface of the metal bracket (1); The header body (3) is fixedly connected to a header shell (6) on the outside, a header main water channel (8) is fixedly installed inside the header shell (6), a heat-insulating layer (9) is provided on the outside of the header main water channel (8), a heat exchange channel (7) and a header water supply channel (10) are fixedly installed inside the header main water channel (8), and a plurality of holes that match the solar vacuum heat collecting tubes (2) are opened at the bottom of the header body (3).

2. The unpowered phase-change thermal storage solar collector according to claim 1, characterized in that: A first dedicated silicone variable diameter seal (12) and an internal thread plug (11) are fixedly installed at one end of the heat exchange channel (7), and a second dedicated silicone variable diameter seal (17) is fixedly connected to the other end of the heat exchange channel (7). The interior of the heat exchange channel (7) is filled with a phase change heat storage material (4).

3. The unpowered phase-change thermal storage solar collector according to claim 1, characterized in that: A plurality of fixing bolts (5) are inserted into the outer wall of the header body (3); the top of the solar vacuum heat collecting tube (2) is fixedly connected to the hole at the bottom of the header body (3); and the interior of the solar vacuum heat collecting tube (2) is filled with a high-temperature medium.

4. The unpowered phase-change thermal storage solar collector according to claim 1, characterized in that: Small holes are provided on the heat exchange channel (7) and the header water supply channel (10).

5. The unpowered phase-change thermal storage solar collector according to claim 1, characterized in that: One end of the header water replenishment channel (10) is fixedly connected to a return pipe (18), and the other end of the header water replenishment channel (10) is fixedly connected to a water supply pipe (19).

6. The unpowered phase-change thermal storage solar collector according to claim 1, characterized in that: A first silicone soft connector (13), a stainless steel inner thread connector (14) and a second silicone soft connector (15) are fixedly connected between the two junction box bodies (3).

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