WO2018191833A1

WO2018191833A1 - Greenhouse cultivation device employing heat generated by variable-frequency drive or inverter

Info

Publication number: WO2018191833A1
Application number: PCT/CN2017/000636
Authority: WO
Inventors: 王承辉; 王世一
Original assignee: 王承辉; 王世一
Priority date: 2017-04-19
Filing date: 2017-10-23
Publication date: 2018-10-25
Also published as: CN106888865A

Abstract

A greenhouse cultivation device employing heat generated by a variable-frequency drive or inverter. The device comprises a greenhouse (1). Several rows of heat dissipation elements (2) and ventilation pipes (3) are buried underground in the greenhouse. The heat dissipation elements are formed by multiple sheet-like radiators (21) connected in series, and each of the radiators is provided with a cooling liquid inlet (211) and a cooling liquid outlet (212). The cooling liquid inlet of a first radiator is connected to a heat generation element of a variable-frequency drive or an inverter via a cooling liquid pipe (4). The cooling liquid outlet of a last radiator is connected to an in-line pump (5) via a cooling liquid pipe. The ventilation pipes have two ends protruding from the ground and located outside of the greenhouse, and have walls extending upward to form several air discharge pipes (32) protruding from the ground and located within the greenhouse. A roof of the greenhouse is provided with a skylight. A temperature sensor is provided within the greenhouse. The device fully utilizes waste heat generated by a heat generation element of a variable-frequency drive or an inverter, thus saving energy for winter cultivation in a greenhouse, and is environmental friendly and energy saving.

Description

Device for greenhouse greenhouse cultivation using heat generated by a frequency converter or an inverter

Technical field

The invention relates to a waste heat utilization technology, in particular to a technology for reusing heat generated by a working process of a power generating device frequency converter, and more particularly to a heat generated by using a wind power generator set inverter or a photovoltaic power generation inverter. A device for planting greenhouses.

Background technique

The frequency converter is a power control device that controls the AC motor by changing the working frequency of the motor by applying frequency conversion technology and microelectronic technology. During the operation of the wind turbine, the frequency converter generates heat and needs to be cooled and cooled. Currently, a water cooling system is used. The water cooling system of the existing wind turbine inverter usually includes a pipeline pump, a radiator and an associated water pipe. The pipeline pump and the radiator are connected in series with the heating element of the frequency converter through a water pipe to form a cooling circuit, and the pipeline pump is installed in the tower tube. Inside, the radiator is installed outside the tower, and the radiator is blown by the air blower disposed on the side of the radiator to cool the air on the fan blade of the radiator for cooling and cooling, and the inverter cooling system not only consumes a large amount of energy, but also It will produce very loud ambient noise. In view of this, the applicants of the present invention developed two new energy-saving cooling and cooling systems for wind turbine inverters in 2014 and 2015, respectively, and submitted them to the country on April 17, 2014 and March 26, 2015, respectively. The Intellectual Property Office applied for a patent, patent numbers 201410154408.4 and 201520174552.4, and the 201410154408.4 patent cooling and cooling system uses the air circulating inside and outside the tower to cool and cool the coolant in the pipeline. The 201520174552.4 patent utilizes the entire tower approximately 1000 square meters. The steel wall acts as a heat sink, and at the same time, it uses the hot gas to rise and the natural wind wind at the top of the tower is large. During the process of the natural wind contacting the tower wall, the heat of the heat box is quickly taken away, so that the heat sink is located inside the heat sink. The coolant with the heat of the heating element of the inverter is quickly cooled. Because of all these cooling and cooling devices, the heat sink, the heat pipe or the heat sink that cools the coolant are basically heat exchanged with the air. This heat exchange not only dissipates the heat, but also the surrounding The environment can also cause thermal pollution.

With the improvement of photovoltaic panel conversion efficiency and price reduction, in some sunshine conditions Good, the market is tight or the city is not easy to reach, photovoltaic power generation has ushered in a good development opportunity, photovoltaic power generation is connected to the power grid on a large scale. The frequency converter used in photovoltaic power generation, also called inverter, also generates a large amount of heat during the working process. In order to ensure its normal operation, it also needs to be cooled and cooled. In addition, photovoltaic panels for photovoltaic power generation need to be occupied. Huge paving sites have become an important factor restricting the further promotion of photovoltaic power generation in the face of increasingly tight land supply.

At present, in the process of planting greenhouse greenhouses in the northern part of the country, in the cold winter, it is necessary to increase the temperature of the greenhouse by burning fuel. For example, the flue gas generated by the combustion of fuel is introduced into the underground of the greenhouse through the passageway dug below the ground for the crops. Roots and seedlings provide heat sources; coal-fired boilers or electric heaters are used to increase the temperature of the greenhouses so that the indoor temperature meets the requirements for planting. With these methods, the amount of fuel consumed in a winter season is considerable, plus the depreciation and labor costs of the boiler system. The high heating costs seriously affect the planting efficiency of greenhouse greenhouses in winter, which has become a major obstacle to the sustainable development of greenhouse cultivation in winter.

Summary of the invention

In order to overcome the above problems, an object of the present invention is to provide a device for greenhouse planting using heat generated by a frequency converter of a power generation device, which can effectively cool and cool a frequency converter of a power generation device, and can reduce winter. The energy consumption of greenhouse cultivation increases the planting efficiency.

In order to achieve the above object, the device for carrying out greenhouse greenhouse cultivation using the heat generated by the frequency converter or the inverter includes a frequency converter or an inverter, a pipeline pump and a coolant pipe, and the pipeline pump passes through the coolant pipe and the frequency converter or The heating element connection in the inverter is characterized in that the device further comprises a greenhouse for planting, and a plurality of rows of heat dissipating components and a plurality of exhaust pipes are buried in the greenhouse, and the heat dissipating component is composed of a plurality of thin sheets. The heat dissipation box is connected in series, and each heat dissipation box is provided with a coolant inlet and a coolant outlet, and the coolant inlet of the first heat dissipation box of each row of heat dissipation components is connected to the heat generating component of the inverter or the inverter through the coolant pipe, and finally The coolant outlet of a heat dissipation box is connected to the pipeline pump through the coolant pipe, so that the heat dissipation box, the pipeline pump and the heating element of the frequency converter or the inverter form a circulation loop; both ends of the ventilation pipe protrude from the ground and are located outside the greenhouse Ventilation The pipe wall extends upwards with a plurality of air outlet pipes protruding from the ground and located in the greenhouse. The roof of the greenhouse is provided with a skylight, and the greenhouse is provided with a temperature sensor for controlling the ventilation area of the sunroof.

In order to make better use of photovoltaic power generation on the top surface of greenhouses for long-term exposure to sunlight, and to reduce the space required for photovoltaic panel laying, the top surface of the greenhouse is connected by multiple double-sloping roof structures, of which double-sloping roof One slope is covered with photovoltaic panels, and the other is a skylight with a greenhouse.

The skylight of the above greenhouse is composed of a fixed window page and a movable window page, and the movable window page is connected with the servo motor through the linkage mechanism, and the servo motor controls the stroke thereof, the servo motor and the temperature sensor disposed in the greenhouse. connection.

In order to more accurately control the temperature in the greenhouse, the two ends of the ventilation pipe are provided with an intake air amount control valve, and the valve is connected with a temperature sensor installed in the greenhouse.

In order to achieve a faster and more uniform heat dissipation effect, the heat dissipation box is laid flat in the soil, and the plane of the box wall on the larger area side is parallel to the ground plane, and the row of the air duct is parallel to the row of the heat dissipating component. And arranged in phase.

The coolant inlets of the first heat dissipation box of the above-mentioned rows of heat dissipating components are connected in parallel with the heating elements of the inverter or the inverter through the coolant pipes, and the coolant outlets of the last heat dissipation tank are connected in parallel through the coolant pipes and the pipeline pump connection.

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

In order to prevent the fan or PV 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 hot air will contact the cold or hot element of the inverter or inverter. Condensed into water on the heating element, causing the inverter or inverter to get wet, and also to prevent the coolant in the water return pipe from freezing in the cold winter, thus affecting the flow of the coolant. A coolant heater is disposed on the coolant pipe between the liquid outlet of the last heat sink of the heat dissipating component and the pipeline pump.

In order to eliminate the influence of the pressure generated by the hydrothermal expansion on the return pipe, the coolant outlet of the last heat dissipation box of each of the rows of heat dissipating components and the coolant pipe between the pipeline pump and the coolant outlet are provided for adjustment. An expansion bag or expansion tank of the shape of the return tube.

In order to avoid the influence of impurities in the coolant on the heating element of the inverter or the inverter, a filter is arranged on the coolant pipe between the coolant outlet of the last heat dissipation box of the respective rows of heat dissipation elements and the pipeline pump.

The system for using the heat generated by the frequency converter or the inverter to carry out greenhouse greenhouse cultivation, the cooling liquid with the heat of the inverter or the inverter is introduced into the heat dissipation component buried in the greenhouse, and the heat dissipation component is compared with the soil. The heat-dissipating box with large contact area transfers heat to the soil, providing heat source for the roots and seedlings of the crops, and adopts a ventilation pipe that communicates with the outside world, and then cooperates with the temperature sensor installed in the greenhouse and the skylight on the top surface of the greenhouse to pass in time. The convection of the air regulates the temperature inside the greenhouse, so that the greenhouse can maintain a constant planting temperature, and the cooling liquid after each heat box can achieve a good cooling and cooling effect, so that the heating elements of the inverter or the inverter can be quickly obtained. Cooling; In addition, using the top surface of the greenhouse to receive light for a long time, laying photovoltaic panels on the top surface of the greenhouse, can greatly save the area of photovoltaic power generation, while increasing power generation, greatly saving photovoltaic power generation the cost of. The system of the invention fully utilizes the waste heat emitted by the heating component of the frequency converter or the inverter, reduces the influence on the surrounding environment, and at the same time saves the energy of the greenhouse planting in the winter, thereby improving the planting efficiency, and having the eco-environmental protection and energy-saving effect. Double value.

DRAWINGS

1 is a schematic view showing the structure of the greenhouse and the underground of the greenhouse greenhouse planting device using the heat generated by the inverter or the inverter.

Figure 2 is a cross-sectional view taken along line A-A of Figure 1 and a schematic structural view of the ground converter or inverter.

Figure 3 is a cross-sectional view of the structure of Figure 1 taken along line B-B.

4 is a schematic structural view of a heat dissipating component and a ventilating pipe buried underground in a greenhouse.

detailed description

The following is an example of greenhouse planting using heat generated by a photovoltaic power generation inverter.

As shown in FIG. 1 , the present invention utilizes the heat generated by the inverter to carry out planting in a greenhouse, including a greenhouse, and the greenhouse is a cubic structure, and a plurality of rows of heat dissipating components are buried in a direction parallel to one side of the greenhouse. 2 and a plurality of rows of air ducts 3, the heat dissipating components and the air ducts are arranged in parallel and arranged in parallel; the heat dissipating components are formed by a plurality of heat dissipating boxes 21 in the form of flakes, and the heat dissipating boxes are laid flat in the soil, and the larger area thereof is The plane of the side wall of the box is parallel to the ground plane, and each of the heat dissipation boxes is provided with a coolant inlet and a coolant outlet, and the coolant inlet and the coolant outlet are located in the middle of the corresponding vertical sidewalls of the heat dissipation boxes, and the heat dissipation components of each row The coolant inlet 211 of one heat dissipation box is connected in parallel with the heating element of the inverter or the inverter through the coolant pipe 4, and the coolant outlet 212 of the last heat dissipation box is connected in parallel with the coolant pipe 4, and then connected to the pipeline pump 5, The heat dissipation box, the pipeline pump and the heating elements of the frequency converter or the inverter form a circulation loop, and the cooling between the liquid outlet of the last heat dissipation box of each row of heat dissipation components and the pipeline pump An expansion bag or expansion tank 41, a filter 42 and a coolant heater 43 having a heat dissipation box volume are sequentially disposed on the tube, as shown in FIGS. 2 and 4; the two ports 31 of the ventilation tube are open to protrude from the ground and are located outside the greenhouse. The air duct wall located in the soil extends upwardly with a plurality of air outlet ducts 32 protruding from the ground and located in the greenhouse, and an air intake control valve 33 is disposed at both ends of the air duct outside the greenhouse, and the control valve and the setting are provided. The temperature sensor connection in the greenhouse is as shown in Fig. 3; the top surface of the greenhouse is connected by a plurality of double-sloping roof structures, wherein the slope of the double-sloping roof is covered with a photovoltaic panel 11 and another slope The skylight of the greenhouse is composed of a fixed window page 12 and a movable window page 13. The movable window is connected to the servo motor 14 through a linkage mechanism, and the servo motor controls the stroke thereof, and the servo motor is disposed in the greenhouse. The temperature sensor in the greenhouse is connected, and when the sunroof is fully opened, the movable window page overlaps with the fixed window page, and when the sunroof is closed, the movable window page and the fixed window page are completely staggered.

The working principle of the device for planting greenhouses in the greenhouse by using the heat generated by the inverter is: the heat generating components of the heat dissipation box, the pipeline pump and the inverter are connected in series to form a circulation loop, and the greenhouse is large. When the photovoltaic panel on the top surface of the shed is photovoltaicized by sunlight, the inverter starts to heat up, and the pipeline pump delivers the coolant to the heating element of the inverter. The heat of the heating element is taken away by the cooling liquid, with heat cooling. The liquid is diverted through the cooling liquid pipe to the cooling liquid inlet of the first heat dissipation box of each row of heat dissipating components buried in the greenhouse greenhouse, and the heat is quickly taken away by the soil by the contact of the heat dissipation box wall with the soil, so that the liquid is located The coolant with the heat of the inverter heating element in the heat dissipation box is quickly cooled, and the cooled coolant is merged into the pipeline pump through the coolant outlet of the last heat dissipation box, and continues to be used; The soil can directly provide heat source for crop roots and seedlings; when the temperature sensor in the greenhouse detects that the temperature in the greenhouse exceeds the set temperature, the movable sunroof of the greenhouse skylight begins to move to one side, open the skylight, and ventilate The intake valves at both ends of the pipe are also opened. As the hot air in the greenhouse rises, the lower part of the greenhouse forms a negative pressure state, and the air is located in the greenhouse. The two ports of the air duct enter the air duct, and then enter the greenhouse from each air duct for replenishment. The continuous supply of air allows the hot air to be continuously discharged from the skylight of the greenhouse, so that the inner and outer convection air 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 sunroof of the greenhouse skylight begins to move to the other side, the sunroof is closed, and the intake valves at both ends of the air duct are also closed. The hot air rises and rapidly raises the temperature of the greenhouse; the moving stroke of the movable window and the air intake of the ventilation pipe are set according to the temperature detected by the temperature sensor.

When the photovoltaic power generation stops generating electricity 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, and the circulation system can continue to work, so that the temperature of the heating element of the inverter is still higher than the surrounding temperature. The ambient temperature prevents the inverter from getting wet.

The invention adopts the laying of photovoltaic panels on the top surface of the greenhouse, and the heat generated by the inverter of the photovoltaic power generation process is led to the underground of the greenhouse, providing energy for the greenhouse in winter, and in the case of increasingly tight land supply, it is undoubtedly photovoltaic power generation. Provide a path to sustainable development. The system of the invention combines the photovoltaic power generation, the cooling and cooling of the inverter and the greenhouse planting, and has the dual value of eco-environmental protection and energy-saving and efficiency enhancement, and is worthy of popularization and use.

The above is only the system for planting greenhouse heat in the heat generated by the inverter or the inverter of the present invention. The specific embodiment of the present invention is not intended to limit the scope of the present invention, and the equivalent implementation or modification of the technical solution of the present invention, such as the cooling and cooling of the wind turbine inverter, the heat-reducing heat pipe The shape, the change in the position of the sunroof in the greenhouse, should be included in the scope of the present invention.

Claims

A device for planting greenhouses by using heat generated by a frequency converter or an inverter, including a frequency converter or an inverter, a pipeline pump, and a coolant pipe, and the pipeline pump is heated by a coolant pipe and a frequency converter or an inverter. The component is connected, and the device further comprises a greenhouse for planting. The greenhouse is embedded with a plurality of rows of heat dissipating components and a plurality of rows of air ducts, and the heat dissipating component is formed by a plurality of heat dissipating boxes arranged in a sheet shape. Each of the heat dissipation boxes is provided with a coolant inlet and a coolant outlet, and the coolant inlet of the first heat dissipation box of each row of heat dissipation elements is connected to the heat generating component of the inverter or the inverter through the coolant pipe, and the coolant of the last heat dissipation box The outlet is connected to the pipeline pump through the coolant pipe, so that the heat dissipation box, the pipeline pump and the heating element of the frequency converter or the inverter form a circulation loop; both ends of the ventilation pipe protrude from the ground and are located outside the greenhouse, and the wall of the ventilation pipe Extending upwards, there are a number of outlet ducts protruding from the ground and located in the greenhouse. The roof of the greenhouse is provided with a skylight, and the greenhouse is provided with a temperature sensor for Air-permeable area of the skylight.
The device for planting a greenhouse in a greenhouse using the heat generated by a frequency converter or an inverter according to claim 1, wherein the top surface of the greenhouse is connected by a plurality of double-sloping roof structures, wherein the double slopes The roof of the roof is covered with photovoltaic panels, and the other side is a skylight with a greenhouse.
The device for planting a greenhouse in a greenhouse using the heat generated by a frequency converter or an inverter according to claim 1, wherein the skylight of the greenhouse is composed of a fixed window and a movable window, and is movable. The window page is connected to the servo motor through the linkage mechanism, and the stroke is controlled by the servo motor, and the servo motor is connected with a temperature sensor disposed in the greenhouse.
The device for planting a greenhouse in a greenhouse using the heat generated by a frequency converter or an inverter according to claim 2 or 3, wherein: at both ends of the air duct, an intake air amount control valve is provided, and the valve is disposed at Temperature sensor connection in the greenhouse.
The heat generated by the inverter or the inverter according to claim 4 is used for the greenhouse The shed planting device is characterized in that: the heat dissipating box is laid flat in the soil, and the plane of the box wall on one side of the larger area is parallel to the ground plane, and the row of the ventilating tube is parallel to the row of the heat dissipating box. And arranged in phase.
The device for planting greenhouses in the greenhouse using the heat generated by the inverter or the inverter according to claim 5, wherein the coolant inlets of the first heat dissipation boxes of the rows of heat dissipating components are connected in parallel through the coolant pipes. Connected to the heating element of the inverter or inverter, and the coolant outlet of the last heat sink is connected in parallel with the coolant pipe and connected to the pipeline pump.
The device for planting a greenhouse in a greenhouse using the heat generated by a frequency converter or an inverter according to claim 6, wherein the coolant inlet and the coolant outlet of the heat dissipation box are located on two corresponding vertical sidewalls of the heat dissipation box. intermediate.
The device for planting a greenhouse in a greenhouse using the heat generated by a frequency converter or an inverter according to claim 7, wherein: cooling between the liquid outlet of the last heat dissipation box of each row of heat dissipating components and the pipeline pump A coolant heater is disposed on the liquid pipe.
The apparatus for greenhouse planting by using heat generated by a frequency converter or an inverter according to claim 8, wherein: a coolant outlet of a last heat dissipation box of each row of heat dissipating components is close to a pipeline pump An expansion bag or an expansion tank for adjusting the volume of the return pipe is disposed on the coolant pipe of the coolant outlet.
The apparatus for greenhouse planting by using heat generated by a frequency converter or an inverter according to claim 9, wherein: cooling between a coolant outlet of the last heat dissipation box of each row of heat dissipating components and a pipeline pump A filter is provided on the liquid pipe.