A cold storage refrigeration device based on adaptive focusing solar energy

Abstract

The utility model discloses a cold storage refrigeration plant based on adaptive focusing solar energy belongs to solar energy utilization refrigeration technical field, including the cold storage, be provided with the sealed door on the cold storage, the inside of cold storage is provided with compressor, air cooler, radiator and refrigerator, is used for the inside cooling of cold storage, for the prior art of comparative document is not tediously repeated here, the top of cold storage is provided with the protection shell of inclination, the inside of protection shell is provided with solar power generation mechanism, installs on solar power generation mechanism the thermoelectric generation mechanism, the bottom of protection shell is provided with power module. The utility model light -concentrating - energy storage - thermoelectric generation integrated architecture: break through traditional solar energy cold storage single power supply mode, realize photothermal and photoelectric dual energy complementation, day and night seamless switching energy supply: through medium circulation and TEG power generation, improve the utilization of solar heat.

Description

Technical Field

[0001] This utility model belongs to the field of solar energy utilization refrigeration technology, specifically, it relates to a cold storage refrigeration device based on adaptive focusing solar energy. Background Technology

[0002] Currently, in some remote rural areas or fruit and agricultural product picking sites, it is often necessary to refrigerate and preserve harvested fruits and agricultural products to extend their shelf life and prevent premature spoilage. Traditional cold storage refrigeration systems require alternating current (AC) and are characterized by good cooling efficiency. However, these traditional cold storage refrigeration systems have the drawback of being unusable in some remote areas or at fruit and agricultural product picking sites where AC power is unavailable. Agricultural products and fruits that are not refrigerated and preserved in a timely manner will have a shortened shelf life, easily leading to spoilage and significant waste.

[0003] Publication No. CN207028984U discloses a solar-powered DC cold storage refrigeration system, including a compressor, a cooler, a radiator, and a freezer. The freezer is a vehicle-mounted freezer, with temperature control buttons mounted on a digital temperature control panel located on the vehicle's dashboard. The cooler, radiator, and freezer are powered by a 24V or 48V rechargeable battery pack, which is connected to a solar charge controller via a power cord. The battery pack converts electrical energy between itself and the vehicle's alternator via a converter. The solar charge controller is connected to a solar panel. A photovoltaic inverter is electrically connected between the output of the battery pack and the input of the compressor. An expansion valve is installed on the compressor body, and a rain collector is installed on the vehicle body. Cooling pipes are installed on the inner wall of the freezer, connecting to the rain collector. A solenoid valve connects the cooling pipes and the rain collector. This system is reliable and has high energy efficiency.

[0004] Existing cold storage facilities use solar power for refrigeration, but this method has limitations in terms of the utilization rate of solar energy. In particular, when there is no sun at night, it cannot meet the power supply needs at night and cannot fully utilize the heat of solar energy.

[0005] To address the aforementioned issues, this application proposes a cold storage refrigeration device based on adaptive focusing solar energy. Utility Model Content

[0006] In view of the problems in the related technologies, this utility model proposes a cold storage refrigeration device based on adaptive focusing solar energy to overcome the above-mentioned technical problems existing in the existing related technologies.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A cold storage refrigeration device based on adaptive focusing solar energy includes a cold storage unit with a sealed door. The interior of the cold storage unit is equipped with a compressor, a cold air blower, a radiator, and a freezer for refrigerating the interior. (Prior art presented in the prior art document is not detailed here.) The top of the cold storage unit is sloped and equipped with a protective shell. A solar power generation mechanism is installed inside the protective shell, and a thermoelectric generator is mounted on the solar power generation mechanism. A power module is located at the bottom of the protective shell. Electricity generated by the solar power generation mechanism and the thermoelectric generator is stored in the power module, which then provides power for refrigeration inside the cold storage unit.

[0009] Preferably, the bottom of the protective shell is provided with four support legs, which are arranged in pairs and have different lengths, so that the protective shell can be installed at an angle on the top of the cold storage through the four support legs.

[0010] Preferably, the solar power generation mechanism includes a solar panel support frame, the top edge of which has a raised frame, a transparent plate is fixedly installed on the raised frame by screws, the top of the transparent plate has multiple arc-shaped spherical surfaces, and the top of the solar panel support frame has multiple solar panels.

[0011] Sunlight shines on the surface of the curved sphere and the transparent plate, penetrating the solar panel. The solar panel converts the light energy into electrical energy and stores it in the power module.

[0012] Preferably, the thermoelectric power generation mechanism includes an insulation cylinder, and two mounting brackets are fixedly installed on the outer side of the insulation cylinder. The two mounting brackets are fixedly installed on both sides of the solar panel support frame. Multiple vacuum heat absorption tubes are connected to the insulation cylinder. The multiple vacuum heat absorption tubes are fixedly installed on the surface of the solar panel support frame, and the multiple vacuum heat absorption tubes are longitudinally staggered with multiple solar panels. The multiple vacuum heat absorption tubes are longitudinally corresponding to multiple arc-shaped spherical surfaces.

[0013] By using multiple curved spherical surfaces to concentrate light, light energy can be focused onto the surface of the vacuum heat absorber tube, heating the liquid medium inside the tube. The heat energy is then stored inside the insulation cylinder, similar to the principle of solar heating.

[0014] Preferably, the thermoelectric generator further includes an isolation plate and multiple hollow heat conduction plates. The isolation plate is fixedly installed inside the protective shell. Multiple thermoelectric generators are embedded in the top of the isolation plate. The multiple hollow heat conduction plates are fixedly installed on the bottom inner wall of the protective shell. The multiple hollow heat conduction plates are arranged in a one-to-one correspondence with the multiple thermoelectric generators. The heating surface of the multiple thermoelectric generators is in contact with the surface of the multiple hollow heat conduction plates. The isolation plate isolates the upper part of the protective shell into a heat dissipation space. Multiple vent holes are opened on both sides of the protective shell, and the multiple vent holes correspond to the heat dissipation space. The multiple hollow heat conduction plates are longitudinally connected by multiple connecting pipes. The bottom end of the longitudinally connected hollow heat conduction plates is connected to the same collection pipe. The top end of the longitudinally connected hollow heat conduction plates is connected to multiple medium connecting pipes. Each of the multiple medium connecting pipes is equipped with a solenoid valve. The multiple medium connecting pipes are threadedly connected to the bottom of the insulation cylinder.

[0015] When there is no solar energy at night, the liquid medium stored inside the insulation cylinder flows into the interior of multiple hollow heat conduction plates through multiple medium connecting pipes. Due to the attraction and conversion of solar energy, the liquid medium stored inside the insulation cylinder is heated and enters the interior of multiple hollow heat conduction plates to generate heat. The heat energy is transferred to multiple thermoelectric generators, which use the temperature difference to generate electricity, which is then stored in the power module.

[0016] Preferably, a return pipe is connected to the outside of the collection pipe, a liquid pump is connected to the return pipe, a recovery pipe is connected to the outlet of the liquid pump, and the recovery pipe is connected to the insulation cylinder.

[0017] When the sun is out during the day, the liquid pump works to recover the liquid medium through the return pipe and the collection pipe. The liquid medium is then sent back into the interior of the insulation cylinder through the recovery pipe and heated again using solar energy for use at night.

[0018] Preferably, multiple clips are fixedly installed on the outer side of the solar panel support frame, and the return pipe is opened on the multiple clips.

[0019] Multiple clips are used to secure the return pipe.

[0020] Preferably, the power module includes a battery box, which contains multiple sets of batteries, an inverter, a rectifier, and a transformer.

[0021] The converted electrical energy is stored in the battery through an inverter, and then released after being processed by a rectifier and a transformer.

[0022] In summary, the technical effects and advantages of this utility model are as follows:

[0023] First, enhanced light capture through concentrated light: The focusing design of the arc-shaped spherical surface concentrates the dispersed sunlight onto the surface of the vacuum heat absorber, significantly improving the photothermal conversion efficiency (experiments show that the surface temperature of the heat absorber can reach over 150°C after concentration).

[0024] Second, the solar panels and heat absorption tubes are arranged in a coordinated manner: the solar panels and vacuum heat absorption tubes are arranged vertically in a staggered manner to avoid shading and achieve full-time coverage of light energy utilization, thereby increasing the overall light energy utilization rate by 30%-40%.

[0025] Third, the daytime energy storage-nighttime energy release closed-loop design ensures continuous energy supply day and night, guaranteeing the continuous operation of the cold storage. During the day, the liquid medium (such as heat transfer oil or molten salt) is heated through vacuum heat absorption tubes, and the heat energy is stored in the insulation cylinder. At night, the medium flows into the hollow heat conduction plate, and the thermal energy is converted into electrical energy using thermoelectric generators (TEGs) to achieve uninterrupted power supply 24 hours a day.

[0026] Fourth, intelligent media circulation management: The closed-loop system composed of liquid pumps and solenoid valves supports automatic media recovery and reheating, reducing manual intervention and ensuring efficient connection between heat energy storage and release.

[0027] This utility model features an integrated architecture for concentrating solar power, energy storage, and thermoelectric power generation: breaking through the traditional single power supply mode of solar cold storage, it achieves complementary dual energy sources of solar thermal and photovoltaic power, and seamless switching of energy supply day and night: through medium circulation and TEG power generation, it improves the utilization rate of solar thermal energy. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the supporting leg, protective shell, solar panel support frame, transparent plate, heat insulation cylinder and related parts of this utility model.

[0030] Figure 3 This is a bottom view of the supporting leg, protective shell, solar panel support frame, transparent plate, heat insulation cylinder, medium connecting pipe and related parts of this utility model.

[0031] Figure 4 This is an exploded structural diagram of the solar power generation mechanism, thermoelectric power generation mechanism and related parts of this utility model;

[0032] Figure 5 This is a bottom view of the structure of the solar power generation mechanism, thermoelectric power generation mechanism and related parts of this utility model.

[0033] Figure 6 This is an exploded structural diagram of the heat insulation cylinder, vacuum heat absorption tube, solar panel support frame and related parts of this utility model.

[0034] Figure 7 This is an exploded structural diagram of the protective box, support leg, hollow heat conduction plate, collection pipe, liquid pump, return pipe and related parts of this utility model.

[0035] In the picture:

[0036] 1. Cold storage; 11. Sealed door; 2. Protective shell; 21. Support leg; 22. Power module; 23. Ventilation hole; 3. Solar power generation mechanism; 31. Solar panel support frame; 32. Solar panel; 34. Mounting bracket; 35. Curved spherical surface; 36. Transparent plate; 4. Thermoelectric power generation mechanism; 41. Insulation cylinder; 42. Vacuum heat absorption tube; 43. Isolation plate; 44. Thermoelectric generator plate; 45. Medium connecting pipe; 46. Solenoid valve; 47. Hollow heat conduction plate; 48. Connecting pipe; 49. Locking block; 410. Return pipe; 411. Liquid pump; 412. Recovery pipe; 413. Collection pipe. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0038] Reference Figure 1-7 A cold storage refrigeration device based on adaptive focusing solar energy includes a cold storage 1 with a sealed door 11. The interior of the cold storage 1 is equipped with a compressor, a cold air blower, a radiator, and a freezer for refrigerating the interior. (Prior art as described in the prior art document is not detailed here.) A protective shell 2 is inclinedly mounted on the top of the cold storage 1. A solar power generation mechanism 3 is installed inside the protective shell 2, and a thermoelectric generator 4 is mounted on the solar power generation mechanism 3. A power module 22 is located at the bottom of the protective shell 2, which powers the device via solar energy. The power generation mechanism 3 and the thermoelectric power generation mechanism 4 generate electricity and store it in the power module 22. The power module 22 provides power for the cooling inside the cold storage 1. The bottom of the protective shell 2 is provided with four support legs 21. The four support legs 21 are arranged in pairs and have different lengths. The protective shell 2 is tilted and installed on the top of the cold storage 1 by the four support legs 21. The power module 22 includes a battery box. The battery box contains multiple sets of batteries, an inverter, a rectifier, and a transformer. The converted electrical energy is converted and stored in the battery by the inverter, and then released after being processed by the rectifier and the transformer.

[0039] Specifically, components such as the solar panel support frame 31, insulation cylinder 41, and hollow heat conduction plate 47 adopt a nested layout to reduce pipe length and heat loss, and the overall system volume is reduced by 40% compared with the traditional separate design.

[0040] The support legs 21 of different lengths allow the protective shell 2 to be installed at an angle, adapting to the optimal solar incidence angle in different latitude regions (such as setting the tilt angle to 36° in the 30° North latitude region), increasing the average annual solar energy reception by 25%.

[0041] Reference Figures 1-5 In this embodiment, the solar power generation mechanism 3 includes a solar panel support frame 31. The top edge of the solar panel support frame 31 has a raised frame. A transparent plate 36 is fixedly installed on the raised frame by screws. Multiple arc-shaped spherical surfaces 35 are embedded in the top of the transparent plate 36. Multiple solar panels 32 are embedded in the top of the solar panel support frame 31.

[0042] Sunlight shines on the surfaces of the curved spherical surface 35 and the transparent plate 36, penetrating onto the solar panel 32. The solar panel 32 converts the light energy into electrical energy and stores it in the power module 22. The curved spherical surface 35 is designed as a segmented parabolic surface to improve the utilization rate of solar energy.

[0043] Reference Figures 4-5 In this embodiment, the thermoelectric power generation mechanism 4 includes a heat preservation cylinder 41. Two mounting brackets 34 are fixedly installed on the outer side of the heat preservation cylinder 41. The two mounting brackets 34 are fixedly installed on both sides of the solar panel support frame 31. Multiple vacuum heat absorption tubes 42 are connected to the heat preservation cylinder 41. The multiple vacuum heat absorption tubes 42 are fixedly installed on the surface of the solar panel support frame 31. The multiple vacuum heat absorption tubes 42 are longitudinally staggered with the multiple solar panels 32. The multiple vacuum heat absorption tubes 42 are longitudinally corresponding to the multiple arc-shaped spherical surfaces 35.

[0044] Multiple curved spherical surfaces 35 act as light concentrators, focusing light energy onto the surface of the vacuum heat absorber tube 42 to heat the liquid medium inside the vacuum heat absorber tube 42. The heat energy is stored inside the heat insulation cylinder 41, similar to the principle of solar heating.

[0045] Specifically, the vacuum heat absorption tube 42 and the vacuum insulation layer of the insulation cylinder 41 can withstand ambient temperatures of -30℃ to 300℃, ensuring stable operation of the system in extremely cold or high temperature environments.

[0046] Reference Figure 4 and Figure 5In this embodiment, the thermoelectric generator mechanism 4 further includes an isolation plate 43 and multiple hollow heat conduction disks 47. The isolation plate 43 is fixedly installed inside the protective shell 2. Multiple thermoelectric generators 44 are embedded in the top of the isolation plate 43. The multiple hollow heat conduction disks 47 are all fixedly installed on the bottom inner wall of the protective shell 2. The multiple hollow heat conduction disks 47 and the multiple thermoelectric generators 44 are arranged in a one-to-one correspondence. The heating surface of the multiple thermoelectric generators 44 is in contact with the surface of the multiple hollow heat conduction disks 47. The isolation plate 43 protects the protective shell 2 from the heat exchanger. The upper part is isolated as a heat dissipation space. Multiple vent holes 23 are opened on both sides of the protective shell 2. The multiple vent holes 23 correspond to the heat dissipation space. Multiple hollow heat conduction plates 47 are connected longitudinally through multiple connecting pipes 48. The bottom of the longitudinally connected hollow heat conduction plates 47 is connected to the same collection pipe 413. The top of the longitudinally connected hollow heat conduction plates 47 is connected to multiple medium connecting pipes 45. Each of the multiple medium connecting pipes 45 is equipped with a solenoid valve 46. The multiple medium connecting pipes 45 are all connected to the bottom of the heat insulation cylinder 41 through threads.

[0047] When there is no solar energy at night, the liquid medium stored inside the insulation cylinder 41 flows into the interior of multiple hollow heat conduction plates 47 through multiple medium connecting pipes 45. Due to the attraction and conversion of solar energy, the liquid medium stored inside the insulation cylinder 41 is heated and enters the interior of multiple hollow heat conduction plates 47 to generate heat. The heat energy is transferred to multiple thermoelectric generators 44, which use the temperature difference to generate electricity. The generated electricity is stored in the power module 22.

[0048] Specifically, the thermoelectric effect (heat → electrical energy).

[0049] Principle: Based on the Seebeck effect, temperature difference directly generates voltage.

[0050] Thermoelectric materials:

[0051] Semiconductor materials such as bismuth telluride (Bi2Te3) and silicon-germanium alloy (SiGe) are used;

[0052] The high-temperature side is heated and excited, and the charge carriers (electrons or holes) diffuse to the low-temperature side to form an electric current.

[0053] Thermoelectric Generator (TEG):

[0054] Structure: Multiple pairs of P-type / N-type semiconductors connected in series, with ceramic heat-conducting plates attached to both sides;

[0055] Performance: At a temperature difference of 100℃, the efficiency is about 5% to 8%; the efficiency of RTG (radioisotope power source) for spacecraft can reach 6% to 10%.

[0056] Reference Figure 3 , Figure 4 and Figure 7In this embodiment, a return pipe 410 is connected to the outside of the collection pipe 413, a liquid pump 411 is connected to the return pipe 410, and a recovery pipe 412 is connected to the outlet of the liquid pump 411. The recovery pipe 412 is connected to the heat preservation cylinder 41.

[0057] When the sun is out during the day, the liquid pump 411 works to recover the liquid medium through the return pipe 410 and the collection pipe 413, and then sends it back into the heat preservation cylinder 41 through the recovery pipe 412 for heating again using solar energy, in preparation for nighttime use.

[0058] Reference Figure 4 and Figure 5 In this embodiment, multiple clips 49 are fixedly installed on the outer side of the solar panel support frame 31, and the return pipe 410 is opened on the multiple clips 49.

[0059] Specifically, the modular design of the transparent plate 36 and the clip 49 supports quick disassembly and replacement, the vacuum heat absorption tube 42 and the thermoelectric generator 44 can be repaired independently, reducing maintenance costs by more than 50%, and multiple clips 49 are used to fix the return pipe 410.

[0060] Working principle: Sunlight shines on the surfaces of the curved spherical surface 35 and the transparent plate 36, penetrating onto the solar panel 32. The solar panel 32 converts the light energy into electrical energy and stores it in the power module 22. Multiple vacuum heat-absorbing tubes 42 are longitudinally aligned with multiple curved spherical surfaces 35. The multiple curved spherical surfaces 35 act as light-concentrating surfaces, focusing the light energy onto the surface of the vacuum heat-absorbing tubes 42 to heat the liquid medium inside the vacuum heat-absorbing tubes 42. The heat energy is stored inside the insulation cylinder 41, similar to the principle of solar heating. At night, when there is no sunlight, the liquid medium stored inside the insulation cylinder 41 flows sequentially into the interior of multiple hollow heat conduction disks 47 through multiple medium connecting pipes 45. The liquid medium stored inside the insulation cylinder 41 is heated through the attraction and conversion of energy. It then enters the interior of multiple hollow heat conduction plates 47 and generates heat. The multiple hollow heat conduction plates 47 are arranged in a one-to-one correspondence with multiple thermoelectric generators 44. The heating surface of the multiple thermoelectric generators 44 is in contact with the surface of the multiple hollow heat conduction plates 47, and the heat energy is transferred to the multiple thermoelectric generators 44. The multiple thermoelectric generators 44 generate electricity using the temperature difference, and the generated electricity is stored in the power module 22. When the sun is out during the day, the liquid pump 411 works and recovers the liquid medium through the return pipe 410 and the collection pipe 413. The liquid medium is then sent back into the interior of the insulation cylinder 41 through the recovery pipe 412 and heated again using solar energy for use at night.

[0061] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cold storage refrigeration device based on adaptive focusing solar energy, comprising a cold storage (1), wherein the cold storage (1) is provided with a sealed door (11), characterized in that, The top of the cold storage (1) is provided with a protective shell (2) at an angle. A solar power generation mechanism (3) is provided inside the protective shell (2). A thermoelectric power generation mechanism (4) is installed on the solar power generation mechanism (3). A power module (22) is provided at the bottom of the protective shell (2). The solar power generation mechanism (3) and the thermoelectric power generation mechanism (4) generate electricity and store it in the power module (22). The power module (22) provides power for the cooling inside the cold storage (1).

2. The cold storage refrigeration device based on adaptive focusing solar energy according to claim 1, characterized in that, The bottom of the protective shell (2) is provided with four support legs (21). The four support legs (21) are arranged in pairs and have different lengths. The protective shell (2) is installed at an angle on the top of the cold storage (1) by the four support legs (21).

3. A cold storage refrigeration device based on adaptive focusing solar energy according to claim 1, characterized in that, The solar power generation mechanism (3) includes a solar panel support frame (31). The top edge of the solar panel support frame (31) has a raised frame. A transparent plate (36) is fixedly installed on the raised frame by screws. Multiple arc-shaped spherical surfaces (35) are embedded in the top of the transparent plate (36). Multiple solar panels (32) are embedded in the top of the solar panel support frame (31).

4. A cold storage refrigeration device based on adaptive focusing solar energy according to claim 3, characterized in that, The thermoelectric generator (4) includes an insulation cylinder (41). Two mounting brackets (34) are fixedly installed on the outside of the insulation cylinder (41). The two mounting brackets (34) are fixedly installed on both sides of the solar panel support frame (31). Multiple vacuum heat absorption tubes (42) are connected to the insulation cylinder (41). The multiple vacuum heat absorption tubes (42) are fixedly installed on the surface of the solar panel support frame (31). The multiple vacuum heat absorption tubes (42) are longitudinally staggered with the multiple solar panels (32). The multiple vacuum heat absorption tubes (42) are longitudinally corresponding to the multiple arc-shaped spherical surfaces (35).

5. A cold storage refrigeration device based on adaptive focusing solar energy according to claim 4, characterized in that, The thermoelectric generator (4) further includes an isolation plate (43) and multiple hollow heat conduction disks (47). The isolation plate (43) is fixedly installed inside the protective shell (2). Multiple thermoelectric generators (44) are embedded in the top of the isolation plate (43). The multiple hollow heat conduction disks (47) are all fixedly installed on the bottom inner wall of the protective shell (2). The multiple hollow heat conduction disks (47) and the multiple thermoelectric generators (44) are arranged in a one-to-one correspondence. The heating surface of the multiple thermoelectric generators (44) is in contact with the surface of the multiple hollow heat conduction disks (47). The isolation plate (43) protects the protective shell (2) from the heat exchanger. The upper part is isolated as a heat dissipation space. Multiple vent holes (23) are provided on both sides of the protective shell (2). The multiple vent holes (23) correspond to the heat dissipation space. Multiple hollow heat conduction plates (47) are connected longitudinally through multiple connecting pipes (48). The bottom of the longitudinally connected hollow heat conduction plates (47) is connected to the same collection pipe (413). The top of the longitudinally connected hollow heat conduction plates (47) is connected to multiple medium connecting pipes (45). Each of the multiple medium connecting pipes (45) is equipped with a solenoid valve (46). The multiple medium connecting pipes (45) are all connected to the bottom of the heat insulation cylinder (41) through threads.

6. A cold storage refrigeration device based on adaptive focusing solar energy according to claim 5, characterized in that, The outside of the collection pipe (413) is connected to a return pipe (410), and a liquid pump (411) is connected to the return pipe (410). The outlet of the liquid pump (411) is connected to a recovery pipe (412), and the recovery pipe (412) is connected to the insulation cylinder (41).

7. A cold storage refrigeration device based on adaptive focusing solar energy according to claim 3 or 6, characterized in that, Multiple clips (49) are fixedly installed on the outside of the solar panel support frame (31), and the return pipe (410) is opened on the multiple clips (49).

8. A cold storage refrigeration device based on adaptive focusing solar energy according to claim 1, characterized in that, The power module (22) includes a battery box, which contains multiple batteries, an inverter, a rectifier, and a transformer.

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