Solar photovoltaic heat collection device

Abstract

A solar photovoltaic heat collection device comprises a solar photovoltaic panel. The inverter is electrically connected with the solar photovoltaic panel; the transformer is electrically connected with the inverter; a heat preservation layer is arranged on the inner wall of the heat collection box body; the silicon dioxide heat collecting body is filled in the heat collecting box body; the electric heating pipe penetrates through the silicon dioxide heat collecting body, and one end of the electric heating pipe is electrically connected with the output end of the transformer; the hot air heat removal pipe is arranged in the silicon dioxide heat collection body in a penetrating manner; the induced draft fan is connected to a drying tail gas outlet of the hot air type dryer; the hot air type dryer is connected to an air outlet of the hot air heating pipe; the electric heating temperature control instrument I is mounted on the silicon dioxide heat collection body; and the electric heating temperature control instrument II is mounted at an air outlet of the hot air heat removal pipe and is used for monitoring and controlling the hot air temperature. The device has the characteristics of low energy consumption, low cost and high efficiency, is not influenced by weather factors, and can realize the continuous production capacity of drying products to be dried.

Description

Technical Field

[0001] The utility model relates to a solar photovoltaic heat collecting device. Background Art

[0002] In the fields of agriculture and food processing, the drying of wet materials is a crucial link, directly related to the quality, storage period and market value of products. Traditional drying methods often rely on fossil fuels such as coal, oil or natural gas. These energy sources are not only costly but also produce a large amount of carbon dioxide and other greenhouse gases during use, having an adverse impact on the environment. Therefore, it is particularly important to find a drying technology with low energy consumption, low cost and environmental friendliness.

[0003] As a clean and renewable energy source, solar energy has gradually received attention in the drying field in recent years. By converting solar energy into electrical energy through solar photovoltaic panels and then further converting it into heat energy, the low-energy consumption, low-cost and high-efficiency drying of wet materials can be achieved. However, this drying method also faces some challenges: on the one hand, there are limitations in continuous production capacity. On cloudy days and at night, sunlight cannot be directly used for drying, which restricts its continuous production capacity. On the other hand, the drying effect of solar energy conversion into electrical energy is directly affected by weather conditions. In rainy and other weather conditions, the collection efficiency of solar energy will be significantly reduced, thus affecting the drying effect and production efficiency. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a solar photovoltaic heat collecting device for drying products to be dried with low energy consumption, low cost and high efficiency, which is not affected by weather factors and can achieve the continuous production capacity of drying products to be dried.

[0005] The utility model is implemented as follows:

[0006] A solar photovoltaic heat collecting device includes:

[0007] A solar photovoltaic panel for converting solar energy into electrical energy;

[0008] An inverter electrically connected to the solar photovoltaic panel for converting the direct current generated by the solar photovoltaic panel into alternating current;

[0009] A transformer electrically connected to the inverter for adjusting the voltage of the alternating current to a range suitable for use by subsequent devices;

[0010] A heat collecting box body with a heat insulation layer provided on its inner wall for maintaining the heat inside the box;

[0011] A silica heat collecting body filled in the heat collecting box body for absorbing and storing solar energy and the heat energy generated by electric heating;

[0012] An electric heating tube is inserted into the silica heat collector, and one end of the electric heating tube is electrically connected to the output end of the transformer for supplementing heat energy.

[0013] A hot air extraction pipe is inserted into the silica heat collector for extracting heat from the heat collector and transferring it to a hot air dryer through a hot air pipe.

[0014] An induced draft fan is connected to the drying exhaust gas outlet of the hot air dryer.

[0015] A hot air dryer is connected to the air outlet of the hot air extraction pipe for receiving the heated air and drying the products to be dried.

[0016] An electric heating temperature controller Ⅰ is installed on the silica heat collector for monitoring and controlling the temperature of the silica heat collector.

[0017] An electric heating temperature controller Ⅱ is installed at the air outlet of the hot air extraction pipe for monitoring and controlling the hot air temperature.

[0018] Furthermore, the air inlet end of the hot air extraction pipe passes through the heat insulation layer and the heat collector box body, extends to the outside of the heat collector box body, and a magnetic control valve Ⅰ and a check valve are arranged on the hot air extraction pipe located outside the heat collector box body for adjusting the air intake volume of the hot air extraction pipe.

[0019] Furthermore, a cold air inlet is provided on the hot air pipe between the hot air extraction pipe and the hot air dryer, a cold air pipe is installed at the cold air inlet, and a magnetic control valve Ⅱ is installed on the cold air pipe for adjusting the hot air temperature fed into the hot air dryer.

[0020] Furthermore, the electric heating tubes and the hot air extraction pipes are arranged layer by layer alternately in the horizontal direction in the silica heat collector to improve the heat exchange efficiency.

[0021] Furthermore, the electric heating tubes and the hot air extraction pipes are arranged in a grid-like staggered pattern in the silica heat collector to further optimize the heat energy distribution and transfer efficiency.

[0022] Furthermore, the heat insulation layer is a silicate heat insulation layer and a high-temperature resistant magnesia brick heat insulation layer. The silicate heat insulation layer is arranged on the inner wall of the heat collector box body, and the high-temperature resistant magnesia brick heat insulation layer is arranged on the silicate heat insulation layer.

[0023] Furthermore, the thickness of the silicate heat insulation layer is 20 cm - 30 cm, and the thickness of the high-temperature resistant magnesia brick heat insulation layer is 20 cm - 30 cm to ensure good heat insulation performance of the heat collector box body.

[0024] The beneficial effects of the present utility model:

[0025] (1) By effectively utilizing solar photovoltaic panels to convert solar energy into electrical energy, it provides energy for the electric heating tubes, reducing the consumption of traditional electrical energy or fuel and lowering the drying cost of the products to be dried. Meanwhile, the silica heat collector inside the heat collection box can efficiently absorb and store solar heat, further improving the energy utilization efficiency.

[0026] (2) The electric heating tubes inside the heat collection box are used in combination with the hot air extraction tubes. When solar energy is insufficient, heat can be supplemented through the electric heating tubes to ensure the continuity and stability of the drying process. In addition, under the action of the induced draft fan, external air is sent into the hot air extraction tubes, and after being heated, hot air is formed and sent into the hot air dryer for direct drying, improving the drying efficiency.

[0027] (3) The silicate heat insulation layer and high-temperature resistant magnesia brick heat insulation layer provided on the inner wall of the heat box effectively reduce heat dissipation, improve the heat energy utilization efficiency, and at the same time protect the heat collection box body and its internal components from high-temperature damage.

[0028] (4) The electric heating tubes and the hot air extraction tubes are arranged layer by layer alternately or in a grid-like staggered manner inside the silica heat collector, which not only increases the heat exchange area and improves the heat transfer efficiency, but also makes the whole device structure compact and occupies a small area.

[0029] (5) This device combines the dual modes of solar photovoltaic power conversion, electric heating tube auxiliary power supply, and the silica heat collector assisting in heating the heating tubes. Even in rainy or other weather conditions, the drying process can be maintained continuously through the electric heating tubes, realizing the continuous production capacity of drying. Description of the Drawings

[0030] Figure 1 is the structural schematic diagram of the present utility model;

[0031] Figure 2 is Figure 1 the side view of

[0032] In the figure: 1 - solar photovoltaic panel, 2 - heat collection box body, 3 - inverter, 4 - transformer, 5 - heat insulation layer, 501 - silicate heat insulation layer, 502 - high-temperature resistant magnesia brick heat insulation layer, 6 - silica heat collector, 7 - electric heating tube, 8 - hot air extraction tube, 9 - induced draft fan, 10 - hot air dryer, 11 - electric heating temperature controller Ⅰ, 12 - electric heating temperature controller Ⅱ, 13 - magnetic control valve Ⅰ, 14 - magnetic control valve Ⅱ, 15 - hot air duct, 16 - cold air duct, 17 - check valve. Detailed Embodiment

[0033] As Figure 1 、 Figure 2As shown in the figure, the solar photovoltaic and heat collection device includes a solar photovoltaic panel 1, an inverter 3, a transformer 4, and a heat collection box body 2. The inverter 3 is electrically connected to the solar photovoltaic panel 1 and is used to convert the direct current generated by the solar photovoltaic panel 1 into alternating current. The transformer 4 is electrically connected to the inverter 3 and is used to adjust the voltage of the alternating current to a range suitable for subsequent equipment. In this embodiment, the adjusted voltage is 380V. The inner wall of the heat collection box body 2 is provided with a heat insulation layer 5, and the heat insulation layer 5 includes a silicate heat insulation layer 501 and a high-temperature resistant magnesia brick heat insulation layer 502. The silicate heat insulation layer 501 is provided on the inner wall of the heat collection box body 2, and the high-temperature resistant magnesia brick heat insulation layer 502 is provided on the silicate heat insulation layer 501. The thickness of the silicate heat insulation layer 501 is 20 cm - 30 cm, and the thickness of the high-temperature resistant magnesia brick heat insulation layer 502 is 20 cm - 30 cm. In this embodiment, the thickness of the silicate heat insulation layer 501 is 30 cm and the thickness of the high-temperature resistant magnesia brick heat insulation layer 502 is 30 cm is taken as an example. Silica heat collection bodies 6 are filled in the heat collection box body 2, and electric heating pipes 7 and hot air extraction pipes 8 are arranged in the silica heat collection bodies 6 in a layer-by-layer alternating manner, and the electric heating pipes 7 and the hot air extraction pipes 8 are arranged in a grid-like staggered manner. The power input end of the electric heating pipe 7 is electrically connected to the output end of the transformer 4.

[0034] The air inlet end of the hot air extraction pipe 8 passes through the heat insulation layer 5 and the heat collection box body 2 and extends to the outside of the heat collection box body 2. A magnetic control valve I 13 and a check valve 17 are provided on the hot air extraction pipe 8 located outside the heat collection box body 2 for adjusting the air intake volume of the hot air extraction pipe 8. A hot air dryer 10 is connected to the air outlet of the hot air extraction pipe 8 through a hot air pipe 15, and an induced draft fan 9 is connected to the drying exhaust gas outlet of the hot air dryer 10. An electric heat control instrument I 11 is installed on the silica heat collection body 6 for monitoring and controlling the temperature of the silica heat collection body 6. A cold air inlet is provided on the hot air pipe 15 between the hot air extraction pipe 8 and the hot air dryer 10, and a cold air pipe 16 is installed on the cold air inlet. An electric heat control instrument II 12 is installed at a position of the hot air extraction pipe 8 close to the cold air inlet for monitoring and controlling the hot air temperature. A magnetic control valve II 14 is installed on the cold air pipe 16 for adjusting the hot air temperature fed into the hot air dryer 10.

[0035] During operation, start the solar photovoltaic panel 1, the inverter 3, and the transformer 4 to make the electric heating tube 7 start working. Then, start the induced draft fan 9 to introduce air into the hot air heat extraction tube 8 for heating. Finally, according to the drying requirements of the product to be dried, set the temperature of the electric heating thermostat II 12 to 80 - 150 °C. The electric heating thermostat II 12 gives electrical signals to the magnetic control valve I 13 and the magnetic control valve II 14 to control the opening degrees of the magnetic control valve I 13 and the magnetic control valve II 14 to control the hot air temperature fed into the hot air dryer 10 to be 80 - 150 °C, and observe the working state of the hot air dryer 10 to ensure the smooth progress of the drying process. On sunny days or when solar energy is sufficient, the solar photovoltaic panel 1 converts solar energy into electrical energy to provide energy for the electric heating tube 7. The electric heating tube 7 heats the silica heat collector 6. The silica heat collector 6 heats the air in the hot air pipe 7 to above 80 °C, and set the temperature of the electric heating thermostat I 11 to 300 - 600 °C. The temperature of the silica heat collector 6 is heated to 300 - 600 °C for heat storage. When the weather changes or solar energy is insufficient, the silica heat collector 6 releases heat to continue heating the air in the hot air pipe 7 to above 80 °C to ensure the continuity and stability of the drying process.

Claims

1. A solar photovoltaic electric heat collector, characterized in that: include: Solar photovoltaic panels, which convert solar energy into electricity; An inverter, electrically connected to the solar photovoltaic panel, for converting direct current generated by the solar photovoltaic panel into alternating current; The transformer is electrically connected to the inverter and is used to adjust the voltage of the AC power to a range suitable for subsequent equipment. The inner wall of the collector box is provided with an insulation layer to maintain the heat inside the box. A silicon dioxide heat collector filled in the heat collector box is used to absorb and store solar energy and heat energy generated by electric heating; The electric heating tube is inserted into the silicon dioxide heat collector, and one end of the electric heating tube is electrically connected to the output end of the transformer for supplementing heat energy; The hot air heat extraction pipe is installed in the silica heat collector to absorb heat from the heat collector and transfer it to the hot air dryer through the hot air pipe; An induced draft fan is connected to the drying exhaust gas outlet of the hot air dryer; A hot air dryer is connected to the air outlet of the hot air heat extraction pipe and is used to receive heated air and dry the product to be dried; Electric temperature controller I, installed on the silica collector, is used to monitor and control the temperature of the silica collector; Electric temperature controller II is installed at the air outlet of the hot air heat pipe to monitor and control the hot air temperature.

2. The solar photovoltaic electric heat collector according to claim 1 is characterized in that: The air inlet end of the hot air heat extraction pipe passes through the insulation layer and the heat collection box body, and extends to the outside of the heat collection box body. A magnetic control valve I and a check valve are provided on the hot air heat extraction pipe located outside the heat collection box body.

3. The solar photovoltaic electric heat collector according to claim 1 is characterized in that: A cold air inlet is arranged on the hot air pipe between the hot air heat extraction pipe and the hot air drying machine, and a cold air pipe is installed on the cold air inlet, and a magnetic control valve II is installed on the cold air pipe.

4. The solar photovoltaic electric heat collector according to claim 1 is characterized in that: The electric heating pipes and the hot air heat extraction pipes are alternately arranged layer by layer in a horizontal direction inside the silicon dioxide heat collector.

5. The solar photovoltaic electric heat collector according to claim 1 is characterized in that: The electric heating pipes and the hot air heat extraction pipes are arranged in a grid-like manner in an alternating manner in the silicon dioxide heat collector.

6. The solar photovoltaic electric heat collector according to claim 1 is characterized in that: The thermal insulation layer comprises a silicate thermal insulation layer and a high temperature resistant magnesium brick thermal insulation layer. The silicate thermal insulation layer is arranged on the inner wall of the collector box, and the high temperature resistant magnesium brick thermal insulation layer is arranged on the silicate thermal insulation layer.

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