CN106888865A - The heat produced using frequency converter or inverter carries out the device of warmhouse booth plantation - Google Patents

Abstract

The invention provides a device for planting in a greenhouse by utilizing the heat generated by a frequency converter or an inverter. Sheet-shaped heat sinks are connected in series, and each heat sink is provided with a coolant inlet and a coolant outlet. The coolant inlet of the first heat sink is connected to the heating element of the frequency converter or inverter through the coolant pipe, and the last one The coolant outlet of the cooling box is connected to the pipeline pump through the coolant pipe. The two ends of the ventilation pipe protrude from the ground and are located outside the greenhouse. tube, a skylight is provided on the top surface of the greenhouse, and a temperature sensor is arranged in the greenhouse. The device of the present invention makes full use of the waste heat emitted by the heating element of the frequency converter or the inverter, saves energy for greenhouse planting in winter, and has dual values of ecological environmental protection and energy saving and efficiency enhancement.

Description

A device for greenhouse planting using heat generated by frequency converters or inverters

technical field

The present invention relates to a waste heat utilization technology, in particular to a technology for reusing heat generated by frequency converters of power generation equipment, and more specifically to a technology for utilizing heat generated by frequency converters of wind power generators or photovoltaic power generation inverters A device for growing in a greenhouse.

Background technique

The frequency converter is a power control device that uses frequency conversion technology and microelectronics technology to control the AC motor by changing the frequency of the motor's working power supply. During the operation of the wind power generating set, its inverter will generate heat, which needs to be cooled and cooled. Currently, a water cooling system is used. The water cooling system of the existing wind turbine frequency converter usually includes pipeline pumps, radiators and related water pipes. The pipeline pumps and radiators are connected in series with the heating elements of the frequency converters through water pipes to form a cooling circuit. Inside, the radiator is installed outside the tower, and the radiator is cooled by blowing cold air on the fan blades of the radiator by the blower set on its side. Because of this inverter cooling system, it not only consumes a lot of energy, but also Very loud ambient noise can be generated. In view of this, the applicant of the present invention successively developed two new energy-saving cooling and cooling systems for frequency converters of wind turbines in 2014 and 2015, and reported to the state on April 17, 2014 and March 26, 2015 respectively The Intellectual Property Office has applied for patents, and the patent numbers are 201410154408.4 and 201520174552.4. The cooling and cooling system of the 201410154408.4 patent uses the air circulating inside and outside the tower to cool down the cooling liquid in the pipeline, while the 201520174552.4 patent uses the entire tower about 1,000 square meters The steel wall is used as a heat sink, and at the same time, the hot air rises and the natural wind at the top of the tower is strong. When the natural wind contacts the tower wall, the heat of the cooling box is quickly taken away, so that the belt located in the cooling box The coolant with the heat of the heating element of the frequency converter is quickly cooled. Because of all these cooling and cooling devices, the radiators, heat pipes or heat dissipation boxes that cool the coolant basically use heat exchange with the air. This heat exchange not only dissipates heat in vain, but also affects the surrounding environment. The environment can also cause thermal pollution.

With the improvement of the conversion efficiency of photovoltaic panels and the reduction of prices, photovoltaic power generation has ushered in good development opportunities in some places with good sunshine conditions, tight city power or difficult access to city power, and photovoltaic power generation is connected to the grid on a large scale. The frequency converter used in photovoltaic power generation, also called inverter, will also generate a lot of heat during the working process. In order to ensure its normal operation, it also needs to be dissipated and cooled; in addition, because the photovoltaic panels of photovoltaic power generation need to occupy The huge laying site has become an important factor restricting the further promotion and use of photovoltaic power generation under the condition of increasingly tight land supply.

At present, in the process of greenhouse planting in the northern region, it is necessary to increase the temperature of the greenhouse by burning fuel in the cold winter. The roots and seedlings provide heat sources; and coal-fired boilers or electric heaters are used to increase the temperature of the greenhouse to make the indoor temperature meet the requirements of planting. Using these methods, a considerable amount of fuel needs to be consumed in winter, plus the depreciation of the boiler system and labor costs, the high heating cost seriously affects the planting efficiency of the winter greenhouse, which has become the main obstacle restricting the sustainable development of winter greenhouse planting.

Contents of the invention

In order to overcome the above existing problems, the object of the present invention is to provide a device for greenhouse planting using the heat generated by the frequency converter of the power generation equipment. Greenhouse planting energy consumption, thereby improving planting efficiency.

In order to achieve the above object, the device of the present invention that uses the heat generated by the frequency converter or inverter to plant in a greenhouse includes a frequency converter or inverter, a pipeline pump and a cooling liquid pipe, and the pipeline pump communicates with the frequency converter or the frequency converter through the cooling liquid pipe. The heating element connection in the inverter is characterized in that the device also includes a greenhouse for planting, and several heat dissipation elements and several rows of ventilation pipes are buried underground in the greenhouse. The cooling boxes are connected in series. Each cooling box is equipped with a cooling liquid inlet and a cooling liquid outlet. The cooling liquid inlet of the first cooling box of each row of cooling elements is connected to the heating element of the frequency converter or inverter through the cooling liquid pipe. The coolant outlet of a heat sink is connected to the pipeline pump through the coolant pipe, so that the heat sink, pipeline pump and the heating element of the frequency converter or inverter form a circulation loop; the two ends of the ventilation pipe protrude from the ground and are located outside the greenhouse , the pipe wall of the ventilation pipe extends upwards with several air outlet pipes protruding from the ground and located in the greenhouse, a skylight is opened on the top surface of the greenhouse, and a temperature sensor is arranged in the greenhouse to control the ventilation area of the skylight.

In order to make better use of the condition that the top surface of the greenhouse is exposed to sunlight for a long time for photovoltaic power generation and reduce the space required for laying photovoltaic panels, the top surface of the above-mentioned greenhouse is connected by multiple double-slope roof structures, of which the double-slope roof One slope is paved with photovoltaic panels, and the other slope is the skylight of the greenhouse.

The skylight of the above-mentioned greenhouse is composed of fixed window leaves and movable window leaves arranged alternately. The movable window leaves are connected to the servo motor through a linkage mechanism, and the stroke is controlled by the servo motor. The servo motor and the temperature sensor installed in the greenhouse connect.

In order to control the temperature in the greenhouse more accurately, air intake volume control valves are arranged at both ends of the ventilation pipe, and the valves are connected with temperature sensors arranged in the greenhouse.

In order to achieve a faster and more uniform heat dissipation effect, the above heat dissipation box is laid flat in the soil, the plane of the box wall on the side with a larger area is parallel to the ground plane, and the row where the above ventilation pipe is located is parallel to the row where the heat dissipation element is located. And arranged alternately.

The coolant inlet of the first cooling tank of the above-mentioned rows of cooling elements is connected in parallel with the heating element of the frequency converter or inverter through the cooling liquid pipe, and the cooling liquid outlet of the last cooling tank is connected in parallel with the pipeline pump through the cooling liquid tube. connect.

The cooling liquid inlet and the cooling liquid outlet of the heat dissipation box are located in the middle of two corresponding vertical side walls of the heat dissipation box.

In order to prevent wind turbines or photovoltaics from stopping power generation for a long time, when the ambient temperature around the inverter or inverter is higher than the temperature of the inverter or inverter, the hotter air will contact the cooler heat-generating components of the inverter or inverter, which will cause Water droplets will condense on the heating element, which will cause the frequency converter or inverter to be damp. At the same time, in order to prevent the cooling liquid in the return pipe of the water tank from freezing in the cold winter, thereby affecting the flow of the cooling liquid, the above rows A coolant heater is arranged on the coolant pipe between the coolant outlet of the last radiator tank of the heat dissipation element and the pipeline pump.

In order to eliminate the influence of the pressure generated by the hot liquid expansion on the return pipe, the cooling liquid pipe between the cooling liquid outlet and the pipeline pump of the last heat dissipation tank of the above-mentioned various heat dissipation elements and near the cooling liquid outlet is provided with a device for adjusting Expansion bag or tank for the volume of the return pipe.

In order to avoid the influence of impurities in the cooling liquid on the heating elements of the frequency converter or inverter, a filter is provided on the cooling liquid pipe between the cooling liquid outlet of the last cooling tank of each row of cooling elements and the pipeline pump.

The system of the present invention uses the heat generated by the frequency converter or inverter for greenhouse planting. The cooling liquid with the heat of the frequency converter or inverter is introduced into the heat dissipation element buried underground in the greenhouse. The heat dissipation box with a large contact area transfers heat to the soil, providing heat source for the roots and seedlings of crops, and the ventilation pipe connected to the outside world, combined with the temperature sensor installed in the greenhouse and the skylight on the top of the greenhouse, can pass through in time. Air convection adjusts the temperature in the greenhouse, so that the greenhouse can maintain a constant planting temperature, and can ensure that the cooling liquid after passing through the cooling boxes achieves a good cooling effect, so that the heating elements of the frequency converter or inverter can be quickly recovered. Cool down; in addition, using the favorable conditions that the top surface of the greenhouse can receive light for a long time, laying photovoltaic panels on the top surface of the greenhouse can greatly save the area occupied by photovoltaic power generation, and greatly save photovoltaic power generation while increasing power generation. the cost of. The system of the present invention makes full use of the waste heat emitted by the heating elements of the frequency converter or inverter, reduces the impact on the surrounding environment, and at the same time saves energy for greenhouse planting in winter, thereby improving planting benefits, and has the advantages of ecological environmental protection, energy saving and efficiency enhancement double value.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the greenhouse planting device using the heat generated by the frequency converter or inverter in the present invention on the ground and underground of the greenhouse.

Fig. 2 is a sectional view along line A-A of Fig. 1 and a schematic diagram of the structure connected to the ground frequency converter or inverter.

Fig. 3 is a schematic cross-sectional structure diagram along line B-B in Fig. 1 .

Fig. 4 is a structural schematic diagram of the cooling elements and ventilation pipes buried underground in the greenhouse.

detailed description

The following takes the use of heat generated by photovoltaic power inverters for greenhouse planting as an example.

As shown in Figure 1, the present invention uses the heat generated by the inverter to plant in a greenhouse, including a greenhouse 1, the greenhouse is a cubic structure, and several rows of cooling elements are buried underground along a direction parallel to one side of the greenhouse. 2 and several rows of ventilation pipes 3, the heat dissipation elements and the ventilation pipes are arranged in parallel and alternately; The plane where the side wall is located is parallel to the ground plane. Each cooling tank is provided with a cooling liquid inlet and a cooling liquid outlet. The cooling liquid inlet and the cooling liquid outlet are located in the middle of the two corresponding vertical side walls of each cooling tank. The coolant inlet 211 of one heat sink is connected in parallel with the heating element of the frequency converter or inverter through the coolant pipe 4, and the coolant outlet 212 of the last heat sink is connected with the pipeline pump 5 after being connected in parallel with the coolant pipe 4. Make the cooling box, the pipeline pump and the heating element of the frequency converter or inverter form a circulation loop, and the cooling liquid pipe between the cooling liquid outlet of the last cooling box of each row of cooling elements and the pipeline pump is sequentially provided with cooling boxes Volume expansion bag or expansion tank 41, filter 42 and coolant heater 43, as shown in Figures 2 and 4; The wall extends upwards with some air outlet pipes 32 that protrude from the ground and are located in the greenhouse. The two ends of the ventilation pipes outside the greenhouse are also provided with air intake control valves 33. The control valve is connected with the temperature sensor installed in the greenhouse. Connection, as shown in Figure 3; the top surface of the greenhouse is connected by a plurality of double-slope roof structures, wherein one slope of the double-slope roof is laid with photovoltaic panels 11, and the other slope is the skylight of the greenhouse. The skylight is composed of fixed window leaves 12 and movable window leaves 13 arranged alternately. The movable window leaves are connected with the servo motor 14 through the linkage mechanism, and the stroke is controlled by the servo motor. The servo motor is connected with the temperature sensor installed in the greenhouse. When the skylight is fully opened, the movable window leaf overlaps the fixed window leaf, and when the skylight is closed, the movable window leaf and the fixed window leaf are completely staggered.

The working principle of the device for planting in greenhouses using the heat generated by inverters in the present invention is as follows: since the heating elements of the heat dissipation box, pipeline pump, and inverters are connected in series to form a circulation loop, the photovoltaic panels on the top surface of the greenhouses are irradiated by sunlight. When photovoltaic power generation is performed, the inverter starts to generate heat, and the pipeline pump delivers the cooling liquid to the heating element of the inverter. The coolant inlet of the first heat dissipation box of each row of heat dissipation elements under the greenhouse enters each heat dissipation box, and the heat is quickly taken away by the soil through the contact between the heat dissipation box wall and the soil, so that the inverter heating element located in the heat dissipation box The hot coolant is quickly cooled down, and the cooled coolant passes through the coolant outlet of the last cooling tank and enters the pipeline pump through the coolant pipe, and continues to be used; at this time, the soil with heat can directly serve as roots and seedlings for crops Provide a heat source; when the temperature sensor in the greenhouse detects that the temperature in the greenhouse exceeds the set temperature, the movable skylight of the greenhouse skylight starts to move to one side, the skylight is opened, and the intake valves at both ends of the ventilation pipe are also opened. The hot air in the greenhouse rises upwards, making the lower part of the greenhouse form a negative pressure state. The air enters the ventilation pipe from the two ports of the ventilation pipe outside the greenhouse, and then enters the greenhouse from each air outlet pipe for replenishment. The continuous replenishment of air makes the hot air continuously It is exhausted from the greenhouse skylight, so that the convective air inside and outside can quickly lower the temperature of the greenhouse; when the temperature sensor in the greenhouse detects that the temperature in the greenhouse does not reach the set temperature, the movable skylight of the greenhouse skylight Start to move to the other side, the skylight is closed, the intake valves at both ends of the ventilation pipe are also closed, the heat of the soil rises, and the temperature of the greenhouse is rapidly increased; the moving stroke of the movable window of the greenhouse skylight and the air intake of the ventilation pipe The temperature detected by the temperature sensor is set.

When the photovoltaic power generation stops for a long time and the ambient temperature around the inverter is higher than the temperature of the inverter, the coolant heater can be turned on to allow the circulation system to continue to work, so that the temperature of the heating element of the inverter is still higher than that of the surrounding The ambient temperature of the inverter should not be affected by moisture.

In the present invention, photovoltaic panels are laid on the top surface of the greenhouse, and the heat generated by the inverter during the photovoltaic power generation process is led to the underground of the greenhouse, so as to provide energy for the greenhouse in winter. In the case of increasingly tense land supply, it is undoubtedly the best solution for photovoltaic power generation. Provide a sustainable development path. The system of the present invention organically combines photovoltaic power generation, inverter cooling and greenhouse planting, has dual values of ecological environmental protection and energy saving and efficiency enhancement, and is worthy of popularization and use.

The above is only a specific description of an embodiment of the system for greenhouse planting with the heat generated by the frequency converter or inverter of the present invention, but this embodiment is not used to limit the protection scope of the present invention, and those who do not deviate from the technical solution of the present invention, etc. Effective implementation or change, such as the cooling of the frequency converter of the wind power generating set, the shape of the circular heat pipe, and the change of the position of the skylight of the greenhouse should all be included in the scope of the present invention.

Claims (10)

1. a kind of heat produced using frequency converter or inverter carries out the device of warmhouse booth plantation, including frequency converter or inversion Device, pipeline pump and coolant pipe, pipeline pump are connected by coolant pipe with the heater element in frequency converter or inverter, feature It is that described device also includes the warmhouse booth for planting, the embedded underground of warmhouse booth has some dissipation thermal elements and some Row's ventilation duct, heat dissipation element is formed in laminar heat dissipation tank concatenation by multiple, and each heat dissipation tank is provided with coolant inlet and cold But liquid outlet, first coolant inlet of heat dissipation tank of each dissipation thermal element is by coolant pipe and frequency converter or the hair of inverter Thermal element connection, the cooling liquid outlet of last heat dissipation tank are connected by coolant pipe with pipeline pump, make heat dissipation tank, pipeline pump Heater element with frequency converter or inverter forms a circulation loop；The two ends of ventilation duct protrude ground and positioned at warmhouse booth Outside, the tube wall of ventilation duct upwardly extend it is some protrude from ground and the discharge pipe in warmhouse booth, warmhouse booth Top surface offers skylight, and temperature sensor is provided with warmhouse booth, the breathing area for controlling skylight.

2. the heat produced using frequency converter or inverter according to claim 1 carries out the device of warmhouse booth plantation, It is characterized in that：The top surface of the warmhouse booth is formed by connecting by multiple saddle roof structures, wherein a slope of saddle roof Face be equipped with photovoltaic panel, it is another it is domatic be the skylight of warmhouse booth.

3. the heat produced using frequency converter or inverter according to claim 1 and 2 carries out the dress of warmhouse booth plantation Put, it is characterised in that：The skylight of the warmhouse booth is constituted by fixed window page is spaced with movable window page, movable window Page is connected by link gear with servomotor, and by its stroke of Serve Motor Control, servomotor be arranged at warmhouse booth Interior temperature sensor connection.

4. the heat produced using frequency converter or inverter according to Claims 2 or 3 carries out the dress of warmhouse booth plantation Put, it is characterised in that：The two ends of the ventilation duct are provided with air inflow control valve, the valve and the temperature being arranged in warmhouse booth Degree sensor connection.

5. the heat produced using frequency converter or inverter according to claim 4 carries out the device of warmhouse booth plantation, It is characterized in that：The heat dissipation tank is laid in soil, and the plane where the tank wall of its larger area side is parallel with ground level, Row where the ventilation duct is parallel with the row where heat dissipation tank and spaced.

6. the heat produced using frequency converter or inverter according to claim 5 carries out the device of warmhouse booth plantation, It is characterized in that：First coolant inlet of heat dissipation tank of each dissipation thermal element by coolant pipe parallel connection after with frequency conversion The heater element connection of device or inverter, the cooling liquid outlet of last heat dissipation tank by coolant pipe it is in parallel after with pipeline pump Connection.

7. the heat produced using frequency converter or inverter according to claim 6 carries out the device of warmhouse booth plantation, It is characterized in that：The coolant inlet and cooling liquid outlet of the heat dissipation tank are located in the middle of the corresponding vertical side walls of heat dissipation tank two.

8. the heat produced using frequency converter or inverter according to claim 7 carries out the device of warmhouse booth plantation, It is characterized in that：But on the coolant pipe between the liquid outlet of last heat dissipation tank of each dissipation thermal element and pipeline pump It is provided with coolant heater.

9. the heat produced using frequency converter or inverter according to claim 8 carries out the device of warmhouse booth plantation, It is characterized in that：It is between the cooling liquid outlet and pipeline pump of last heat dissipation tank of each dissipation thermal element and cold near this But the expanding bag or expansion drum for adjusting back-shaped pipe volume are provided with the coolant pipe of liquid outlet.

10. the heat produced using frequency converter or inverter according to claim 9 carries out the device of warmhouse booth plantation, It is characterized in that：Coolant pipe between the cooling liquid outlet and pipeline pump of last heat dissipation tank of each dissipation thermal element On be provided with filter.