Regulation and control method of low-carbon sunny-dark sunlight greenhouse

Abstract

The invention discloses a regulation and control method for a low-carbon sunny and sunny type sunlight greenhouse, and belongs to the technical field of indoor planting, in an assembled sunny and sunny greenhouse, the temperature and CO2 concentration in the sunny and sunny greenhouse are controlled according to the requirements of different crops planted in the sunny and sunny greenhouse, a heat collection system is installed in the sunny greenhouse, and the heat collection system is connected with the sunny greenhouse. A heat storage system, a temperature and CO2 adjusting system and a control system are installed in the shady shed and the sunny shed, the control system adjusts the heat collection system, the heat storage system and the temperature and CO2 adjusting system to conduct comprehensive regulation and control, accurate control over the temperature and CO2 concentration in the shady shed and the sunny shed is achieved, and the growth efficiency of crops is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of indoor planting, and in particular relates to a control method for a low-carbon yin-yang type solar greenhouse. Background Art

[0002] The Yin-Yang solar greenhouse is a greenhouse with a north-facing lighting surface, which is added to the north side of the traditional solar greenhouse by using (or sharing) the back wall. The two together form a Yin-Yang solar greenhouse. The greenhouse with the lighting surface facing the sun is called the Yang room, and the greenhouse with the lighting surface facing away from the sun is called the Yin room. The Yin-Yang solar greenhouse, the Yin room, just makes use of the back wall of the traditional solar greenhouse and the distance between the front and back of the greenhouse, so that the land utilization rate of the solar greenhouse is improved. The Yin room is generally used to grow edible fungi and other cultivated products; the Yang room is used to grow ordinary greenhouse vegetables and other cultivated products.

[0003] The following problems may be encountered in the actual application of the yin-yang shed: (1) In order to store more solar energy and have better thermal insulation performance, the back wall of conventional solar greenhouses is mostly made of earth wall structure. The thick earth wall of the shady shed formed on this basis occupies part of the space of the shady shed, reducing the soil utilization rate.

[0004] (2) Since less sunlight enters the shade shed during the day, the temperature of the shade shed in colder areas in winter cannot meet the growth needs of fungi or other shade-loving crops. Certain warming measures are still needed to ensure their normal growth.

[0005] (3) The CO2 produced by the growth of edible fungi in the shade shed cannot be absorbed by crops such as vegetables in the sun shed. Summary of the invention

[0006] The purpose of the present invention is to provide a control method for a low-carbon yin-yang type solar greenhouse, which can provide a low-carbon, low-energy, and high-efficiency yin-yang greenhouse to solve the above-mentioned problems and provide a solution for the normal wintering production of crops in two different growth environments.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is: A control method for a low-carbon yin-yang type solar greenhouse, in which the temperature and CO2 concentration in the shady shed and the sun shed are controlled according to the needs of different crops planted in the shady shed and the sun shed in the assembled shady shed, a heat collection system is installed in the sun shed of the shady shed and the sun shed, and a heat storage system, a temperature and CO2 control system are installed in the shady shed and the sun shed, the heat collection system includes a waste heat recovery device and a solar water heater installed above the sun shed and a heat storage device on the sun side partition wall, the heat storage system includes an underground temperature storage device connected to the waste heat recovery device and a water storage tank arranged in the shady shed, the solar water heater, the heat storage device and the heat dissipation device on the shady side partition wall are all connected to the water storage tank, the temperature and CO2 control system includes a temperature and humidity sensor, an oxygen sensor, a CO2 sensor, a temperature sensor arranged in the water storage tank and the heat dissipation device, a plurality of fans arranged on the upper part of the partition wall and a plurality of ventilation windows arranged on the lower part of the partition wall, and also includes a control system for controlling the heat collection system, the heat storage system and the temperature and CO2 control system; The control method specifically comprises the following steps: During the daytime heat collection phase: the temperature threshold T of the sun shed during the day is set in the control system hy1 、T hy2 , T hy1 <T hy2 ,CO2 concentration thresholds for shade sheds and sun sheds; Step S1, the temperature and humidity sensor, oxygen sensor and CO2 sensor transmit the temperature and humidity, oxygen concentration and CO2 concentration in the shade shed and the sun shed to the control system at a regular time; Step S2: When the shed temperature T y Higher than T hy1 , turn on the waste heat recovery equipment to circulate the heat to the underground storage device for storage, T y <T hy1 Stop when Step S3: When the temperature of the solar water heater tank Ts minus the temperature of the water storage tank Tw>4°C, start the medium circulation between the solar water heater and the water storage tank; when Ts-Tw<1°C and T y <T hy1 Stop when any condition is met; Step S4: When the shed temperature T hy1 <T y <T hy2 , the light intensity is greater than the light saturation point, the CO2 concentration in the shed is C y -CO2 concentration in shade shed C b When the CO2 concentration is >200ppm, adjust the CO2 concentration of the shade shed and sun shed by adjusting the switch and opening of the ventilation window and the switch and speed of the fan; When adjusting the CO2 concentration, when T y <Thy1 Stop when Step S5, T y >T hy2 When the temperature is adjusted, the switch and opening degree of the ventilation window and the switch and speed of the fan can be adjusted; Step S6: When adjusting the temperature, the shade shed temperature T b Higher than T hy2 Close ventilation windows and fans; Step S7: When the temperature is too high in summer, the shed temperature T y When the temperature is higher than the maximum limit that the crops can bear, open the vents on the top of the shed and ventilate to the outside for cooling, and close the ventilation windows and fans; Night heat release stage: Set the temperature threshold T of the sun shed and shade shed at night in the control system n and T C ; Step S8, the temperature and humidity sensor, oxygen sensor, and CO2 sensor transmit the temperature, humidity, and oxygen concentration in the shade shed and the sun shed to the control system at a regular time; Step S9: Shade shed temperature T b <T C When the temperature is +4℃, the water storage tank of the shade shed and the medium circulation of the heat dissipation device are turned on to dissipate heat. b >T C Close the cycle at +6°C; When T b <T C +2℃, turn on the emergency heating rod in the water tank, start the water tank and heat dissipation device of the shade shed to circulate the medium for heating and heat dissipation until T b >T C Close the cycle at +6°C; Step S10: When the temperature is too low in winter, the night temperature of the shed is T y Lower than the minimum value T that crops can withstand n When the emergency heating rod of the water storage tank is turned on, the medium circulation between the water storage tank of the shade shed and the heat storage device is turned on to dissipate heat, and the heating is carried out and circulated until T y >T n +2℃.

[0008] The further improvement of the technical solution of the present invention is that the method of adjusting the ventilation windows and fans in step S3 is as follows: first open 1 / 2 of the fans and 1 / 2 of the ventilation windows, and the initial opening of the ventilation windows is 60%; after running for 10 minutes, detect the CO2 concentration C of the shed. y and CO2 concentration in the shade shed C bIs the decreasing speed of the difference less than 5%? If so, increase the opening of the ventilation window by 20% until the opening is 100%. If the decreasing speed of the difference is still less than 5%, increase the number of ventilation windows and fans until all ventilation windows are fully opened. If the decreasing speed of the difference is still less than 5%, increase the speed of the fan. The method for adjusting the ventilation windows and fans in step S5 is as follows: turn on 1 / 2 of the fans and 1 / 2 of the ventilation windows, with the initial opening of the ventilation windows being 60%; and check the shed temperature T every 10 minutes. y For every 1°C increase, the ventilation window opening increases by 10%. After reaching 100%, increase the number of ventilation windows and the number of fans opened until all ventilation windows are fully open, and increase the number or speed of fans opened.

[0009] A further improvement of the technical solution of the present invention is that the shade shed and the sun shed include a common partition wall and a supporting frame extending from the top of the partition wall in the north-south direction respectively, the ventilation window is provided with an automatic rolling shutter device, the fan is a permanent magnet fan, a plurality of solar water heaters are provided in the sun shed near the shed film, a water storage tank is provided in the shade shed near the shed film along the length direction of the shade shed, an electromagnetic switch valve I and a circulation pump are provided on the connecting pipe between the solar water heater and the water storage tank, a three-way valve and a circulation pump are provided on the connecting pipe between the water storage tank and the heat dissipation device and the heat storage device, an electromagnetic switch valve II and a water pump are provided on the return water pipe connecting the waste heat recovery device and the underground temperature storage device, and an electromagnetic switch valve III and an electromagnetic switch valve IV are provided on the two water supply pipes connecting the waste heat recovery device and the underground temperature storage device.

[0010] A further improvement of the technical solution of the present invention is that the control system and waste heat recovery equipment, temperature and humidity sensors, temperature sensors, oxygen sensors, CO2 sensors, all electromagnetic switch valves inside the greenhouse, three-way valves, water pumps, circulation pumps, permanent magnet fans and automatic rolling curtain equipment are electrically connected.

[0011] A further improvement of the technical solution of the present invention is that the waste heat recovery equipment includes a box body provided with an air inlet and an air outlet, an air-water heat exchange device is arranged inside the box body, one side panel of the box body is inclined and faces the side of the greenhouse lighting surface, the inclined side panel of the box body is a black heat absorbing plate, and the air-water heat exchange device is connected to the underground temperature storage device through a group of water channels.

[0012] A further improvement of the technical solution of the present invention is that a heat collecting plate is laid inside the inclined side plate of the box body, and the internal water channel of the heat collecting plate is connected in parallel with the air-water heat exchange device and is connected to the underground temperature storage device through the water channel.

[0013] A further improvement of the technical solution of the present invention is that the heat storage device includes a black heat storage wall fixed on the positive side partition wall, the heat dissipation device includes a water wall fixed on the negative side partition wall, the black heat storage wall and the water wall both include a plurality of heat storage units and water outlet pipes and return pipes connected in series, and the water outlet pipes and return pipes are connected to the water storage tank.

[0014] A further improvement of the technical solution of the present invention is that an embedded automatic rolling shutter device is arranged in the ventilation window, and the automatic rolling shutter device includes a square installation frame and a rolling shutter blade. The upper frame of the installation frame is a mounting box for the motor and the rolling shutter tube, and a moving guide rail for the rolling shutter blade is arranged in the middle of the left and right frames of the installation frame.

[0015] The further improvement of the technical solution of the present invention is that the control system formulates different temperature and humidity and CO2 concentration thresholds for shade sheds and sun sheds according to the growing season and habits of the crops planted and the light conditions. hy1 T is the suitable temperature for crops to grow in the sun shed during the day. hy2 It is the lower value between the maximum temperature limit for crops in the sun shed during the day and the fixed value of 28℃. Tc is the minimum temperature limit for crops in the shade shed at night.

[0016] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is: The present application provides a control method for a low-carbon yin-yang solar greenhouse, which uses a thinner insulation wall to increase the utilization rate of the yin-yang greenhouse land. At the same time, the present application tries to take no active warming measures, relying on waste heat recovery equipment, solar water heaters and heat storage devices on the partition wall to absorb solar heat, solving the problem of the need for warming planting in the yin-yang greenhouse in winter, and forming a low-carbon, low-energy yin-yang greenhouse.

[0017] The electromagnetic fan, ventilation window and control system arranged in the greenhouse of the present application realize the gas exchange and precise control between the shade shed and the sun shed, thereby improving the growth efficiency of crops. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the low-carbon yin-yang solar greenhouse of the present application; Figure 2 This is a schematic diagram of the partition wall on the awning side; Figure 3 yes Figure 1 The enlarged schematic diagram of part A in the middle; Figure 4 It is a schematic diagram of an embedded automatic roller shutter device; Figure 5 This is a schematic diagram of the appearance of the Yin-Yang shed; Figure 6 is a schematic diagram of a waste heat recovery device; Among them, 1. Sun shed, 2. Shade shed, 3. Waste heat recovery equipment, 4. Solar water heater, 5. Heat storage device, 6. Heat dissipation device, 7. Temperature storage device, 8. Partition wall, 9. Water pump, 10. Solenoid switch valve II, 11. Solenoid switch valve III, 12. Solenoid switch valve IV, 13. Fan, 14. Ventilation window, 15. Upper frame, 16. Roller shutter, 17. Installation frame, 18. Solenoid switch valve I, 19. Three-way valve, 20. Water tank. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with embodiments: like Figure 1 , 2 As shown, a low-carbon yin-yang type solar greenhouse includes an assembled yin-yang shed, wherein the yin shed 2 and the sun shed 1 include a common partition wall 8 and a support frame extending from the top of the partition wall to the north and south directions respectively, a heat collection system is installed in the sun shed 1, and a heat storage system, a temperature and CO2 adjustment system are installed in the yin shed 2 and the sun shed 1. The heat collection system includes a waste heat recovery device 3 and a solar water heater 4 installed above the sun shed 1 and a heat storage device 5 on the sun side partition wall, and the heat storage system includes an underground temperature storage device 7 respectively arranged under the main body of the yin shed 2 and the sun shed 1 and connected to the waste heat recovery device And a water tank 20 is arranged in the shade shed, the solar water heater 4 and the heat storage device 5 are respectively connected to the water tank 20, and the water tank 20 is connected to the heat dissipation device 6 on the shade partition wall. The temperature and CO2 regulation system includes temperature and humidity sensors, oxygen sensors, CO2 sensors, temperature sensors arranged in the water tank 20 and the heat dissipation device 6, and a plurality of fans 13 arranged on the upper part of the partition wall 8 and a plurality of ventilation windows 14 arranged on the lower part of the partition wall, and also includes a control system for controlling the heat collection system, the heat storage system, and the temperature and CO2 regulation system.

[0020] The fans 13 and the ventilation windows 14 are arranged in rows at equal intervals on the upper and lower parts of the partition wall 8 respectively.

[0021] Both the shed 2 and the sun shed 1 are provided with temperature and humidity sensors, oxygen sensors, and CO2 sensors. The ventilation window 14 is provided with an automatic rolling curtain device. The fan 13 is a permanent magnet fan. The sun shed 1 is provided with several solar water heaters 4 near the shed film. The shed 2 is provided with a water tank 20 near the shed film along the length direction of the shed. The connecting pipe between the solar water heater 4 and the water tank 20 is provided with an electromagnetic switch valve I18 and a circulation pump. The connecting pipe between the water tank 20 and the heat dissipation device 6 and the heat storage device 5 is provided with an electromagnetic switch valve and a circulation pump. An emergency heating rod is provided in the water tank 20. The return water pipe connecting the waste heat recovery device 3 and the underground temperature storage device 7 is provided with an electromagnetic switch valve II10 and a water pump 9. The two water supply pipes connecting the waste heat recovery device 3 and the underground temperature storage device 7 are provided with an electromagnetic switch valve III11 and an electromagnetic switch valve IV12.

[0022] The heat collection system is a waste heat recovery device 3, a solar water heater 4 and a heat storage device 5 on the sunny partition wall. The waste heat recovery device 3 stores excess heat in an underground temperature storage device 7. In addition to the underground temperature storage device 7, the heat storage system also includes a water storage tank 20 arranged in the shade. The heat storage device 5 includes a black heat storage wall fixed on the sunny partition wall, and the heat dissipation device 6 includes a water wall fixed on the shady partition wall. The black heat storage wall and the water wall both include a number of heat storage units connected in series and an outlet pipe and a return pipe. The outlet pipe and the return pipe are connected to the water storage tank 20. When there is plenty of sunshine during the day and the insulation covering the top of the greenhouse is turned on, the sun can directly shine on the heat storage device 5 to heat the medium inside. The internal medium can be water, and the temperature of the medium is increased by heating, and heat can be released continuously. It can also circulate with the water storage tank to store heat in the water storage tank. Figure 3 As shown, the water tank 20 is connected to the heat dissipation device 6 and the heat storage device 5, and a three-way valve 19 is provided on the connecting pipes of the heat dissipation device and the heat storage device and the water tank 20. During the day, the solar water heater 4 absorbs heat and transfers it to the water tank 20, and the heat storage device 5 also absorbs heat and transfers it to the water tank 20. The water tank 20 is connected to the heat dissipation device 6 or the heat storage device 5 for water circulation, which can heat the shade shed or the sun shed. A heat preservation layer is provided on the connecting pipe of the solar water heater 4 and the water tank 20 to prevent temperature loss.

[0023] The control system and waste heat recovery equipment 3, temperature and humidity sensors, temperature sensors, oxygen sensors, CO2 sensors, all electromagnetic switch valves, water pumps, circulation pumps, permanent magnet fans and automatic rolling curtain equipment inside the greenhouse are electrically connected, and the control system performs unified control of the electromagnetic switch valves, permanent magnet fans and automatic rolling curtain equipment.

[0024] like Figure 6As shown, the waste heat recovery device 3 includes a box body with an air inlet and an air outlet, a ventilation fan is provided on the box body, an air-water heat exchange device is provided inside the box body, one side plate of the box body is inclined and faces the side of the greenhouse lighting surface, the inclined side plate of the box body is a black heat absorbing plate, and the air-water heat exchange device is connected to the underground temperature storage device through a set of water channels. The air-water heat exchange device includes a heat exchanger, and hot air passes through the heat exchanger to transfer heat to the medium inside the heat exchanger.

[0025] The inclined side plate of the waste heat recovery device 3 is a black heat absorbing plate, which can absorb solar energy and convert it into heat. At the same time, it can also absorb excess heat in the shed and transfer the heat to the underground temperature storage device 7 for storage.

[0026] In another preferred embodiment, a heat collecting plate is laid inside the inclined side plate, a water channel is provided inside the heat collecting plate, the water channel is connected in parallel with the air-water heat exchange device, and is connected to the underground temperature storage device through a group of water channels.

[0027] An embedded automatic rolling curtain device is arranged in the ventilation window 14, and the automatic rolling curtain device comprises a square mounting frame 17 and a rolling curtain piece 16. The upper frame 15 of the mounting frame is a mounting box for the motor and the rolling curtain tube, and a moving guide rail for the rolling curtain piece is arranged between the left and right frames of the mounting frame. The opening of the ventilation window is controlled by a control system.

[0028] A method for regulating a low-carbon yin-yang solar greenhouse is provided, which controls the temperature and CO2 concentration in the shady shed and the sun shed according to the needs of different crops planted in the shady shed and the sun shed, and specifically comprises the following steps: During the daytime heat collection phase: the temperature threshold T of the sun shed during the day is set in the control system hy1 , T hy2 , CO2 concentration threshold of shade shed and sun shed, T hy1 <T hy2 ; Step S1, the temperature and humidity sensor, oxygen sensor, and CO2 sensor transmit the temperature and humidity, oxygen concentration, and CO2 concentration in the shade shed and the sun shed to the control system at a regular time; Step S2: When the shed temperature T y Higher than T hy1 , turn on the waste heat recovery equipment 3 and water pump 9, electromagnetic switch valve II10, electromagnetic switch valve III11, electromagnetic switch valve IV12, T y <T hy1 Stop when Step S3: When the temperature of the solar water heater tank Ts-the temperature of the water storage tank 20 Tw>4°C, the electromagnetic switch valve I18 and the circulation pump of the solar water heater are turned on; Ts-Tw<1°C and T y <T hy1 Stop when any condition is met; The specific method of adjusting the ventilation windows and fans is: first open 1 / 2 of the fans and 1 / 2 of the ventilation windows, and the initial opening of the ventilation windows is 60%; after running for 10 minutes, detect the CO2 concentration C of the shed. y and CO2 concentration in the shade shed C b Is the decreasing speed of the difference less than 5%? If so, increase the opening of the ventilation window by 20% until the opening is 100%. If the decreasing speed of the difference is still less than 5%, increase the number of ventilation windows and fans until all ventilation windows are fully opened. If the decreasing speed of the difference is still less than 5%, increase the speed of the fan. Step S4: When the shed temperature T hy1 <T y <T hy2 , the light intensity is greater than the light saturation point, the CO2 concentration in the shed is C y -CO2 concentration in shade shed C b When the CO2 concentration is >200ppm, the CO2 concentration of the shade shed and sun shed can be adjusted by adjusting the switch and opening of the ventilation window and the switch and speed of the permanent magnet fan; When adjusting the CO2 concentration, when T y <T hy1 Stop when Step S5, T y >T hy2 When the temperature is adjusted, the switch and opening degree of the ventilation window and the switch and speed of the permanent magnet fan can be adjusted; The method of adjusting the ventilation windows and fans is as follows: open 1 / 2 of the fans and 1 / 2 of the ventilation windows, with the initial opening of the ventilation windows at 60%; detect the shed temperature T every 10 minutes. y For every 1°C increase, the ventilation window opening increases by 10%. After reaching 100%, increase the number of ventilation windows and the number of fans opened until all ventilation windows are fully open, and increase the number or speed of fans opened.

[0029] Step S6: When adjusting the temperature, the shade shed temperature T b Higher than T hy2 Close ventilation windows and fans; Step S7: When the temperature is too high in summer, the shed temperature T y When the temperature exceeds the upper limit of the crop, open the vents on the top of the shed and ventilate to the outside for cooling, and close the ventilation windows and fans; During the night heat release phase, the temperature threshold T of the shade shed is set in the control system. C ; Step S8: The temperature and humidity sensor, oxygen sensor, and CO2 sensor transmit the temperature, humidity, and oxygen concentration in the shade shed and the sun shed to the control system at a regular time; Step S9: Shade shed temperature T b<T C When the temperature is +4℃, the electromagnetic switch valve and the circulation pump on the water storage tank 20 of the shade shed and the pipeline of the heat dissipation device 6 are turned on. b >T C Turn off the circulation pump at +6℃; When T b <T C +2℃, turn on the emergency heating rod of the water tank 20, turn on the electromagnetic switch valve and circulation pump on the pipeline of the water tank 20 and the heat dissipation device 6 of the shed, and heat and circulate until T b >T C Turn off the circulation pump at +6℃.

[0030] Step S10: When the temperature is too low in winter, the night temperature of the shed is T y When the temperature is lower than the minimum value that the crop can bear, the emergency heating rod of the water storage tank 20 is turned on, and the switch and circulation pump on the connecting pipe between the water storage tank 20 and the heat storage device 5 of the shade shed are turned on, that is, the three-way valve on the water path is opened to heat and circulate until T y >T n +2℃.

[0031] The control system sets different temperature, humidity and CO2 concentration thresholds for shade sheds and sun sheds according to the growing season, habits and light conditions of the crops planted. hy1 T is the suitable temperature for crops to grow in the sun shed during the day. hy2 It is the lower value between the maximum temperature limit for crops in the sun shed during the day and the fixed value of 28℃. Tc is the minimum temperature limit for crops in the shade shed at night.

Claims

1. A method for regulating a low-carbon yin-yang solar greenhouse, characterized in that: In the assembled shady shed, the temperature and CO2 concentration in the shady shed and the sun shed are controlled according to the needs of different crops planted in the shady shed and the sun shed. A heat collection system is installed in the sun shed (1) of the shady shed, and a heat storage system, a temperature and CO2 regulation system are installed in the shady shed (2) and the sun shed (1). The heat collection system includes a waste heat recovery device (3) and a solar water heater (4) installed above the sun shed (1) and a heat storage device (5) on the sun side partition wall. The heat storage system includes an underground temperature storage device (7) connected to the waste heat recovery device and an underground temperature storage device (8) installed under the main body of the shady shed (2) and the sun shed (1). A water storage tank (20) is arranged in the shade shed, and the solar water heater (4), the heat storage device (5) and the heat dissipation device (6) on the shade partition wall are all connected to the water storage tank (20). The temperature and CO2 regulation system comprises a temperature and humidity sensor, an oxygen sensor, a CO2 sensor arranged in the shade shed and the sun shed, a temperature sensor arranged in the water storage tank (20) and the heat dissipation device (6), a plurality of fans (13) arranged on the upper part of the partition wall (8) and a plurality of ventilation windows (14) arranged on the lower part of the partition wall, and also comprises a control system for controlling the heat collection system, the heat storage system and the temperature and CO2 regulation system; The control method specifically comprises the following steps: During the daytime heat collection phase: the temperature threshold T of the sun shed during the day is set in the control system hy1 , T hy2 , T hy1 <T hy2 ,CO2 concentration thresholds for shade sheds and sun sheds; Step S1, the temperature and humidity sensor, oxygen sensor and CO2 sensor transmit the temperature and humidity, oxygen concentration and CO2 concentration in the shade shed and the sun shed to the control system at a regular time; Step S2: When the shed temperature T y Higher than T hy1 , start the waste heat recovery device (3) to circulate the heat to the underground temperature storage device (7) for storage, T y <T hy1 Stop when Step S3: When the temperature of the solar water heater (4) water tank Ts minus the temperature of the water storage tank (20) Tw>4°C, start the medium circulation between the solar water heater (4) and the water storage tank (20); when Ts-Tw<1°C and T y <T hy1 Stop when any condition is met; Step S4: When the shed temperature T hy1 <T y <T hy2 , the light intensity is greater than the light saturation point, the CO2 concentration in the shed is C y -CO2 concentration in shade shed C b When the CO2 concentration is >200ppm, the CO2 concentration in the shade shed and the sun shed is adjusted by adjusting the switch and opening of the ventilation window (14) and the switch and speed of the fan (13); When adjusting the CO2 concentration, when T y <T hy1 Stop when Step S5, T y >T hy2 When the temperature is adjusted, the temperature is adjusted by adjusting the switch and opening degree of the ventilation window (14) and the switch and rotation speed of the fan (13); Step S6: When adjusting the temperature, the shade shed temperature T b Higher than T hy2 Close ventilation windows and fans; Step S7: When the temperature is too high in summer, the shed temperature T y When the temperature is higher than the maximum limit that the crops can bear, open the vents on the top of the shed and ventilate to the outside for cooling, and close the ventilation windows and fans; Night heat release stage: Set the temperature threshold T of the sun shed and shade shed at night in the control system n and T C ; Step S8, the temperature and humidity sensor, oxygen sensor, and CO2 sensor transmit the temperature, humidity, and oxygen concentration in the shade shed and the sun shed to the control system at a regular time; Step S9: Shade shed temperature T b <T C When the temperature is +4℃, the water storage tank (20) of the shade shed and the medium circulation of the heat dissipation device (6) are turned on to dissipate heat. b >T C Close the cycle at +6°C; When T b <T C When the temperature reaches +2°C, the emergency heating rod in the water storage tank (20) is turned on, and the medium circulation of the water storage tank (20) and the heat dissipation device (6) of the shade shed is turned on to heat and circulate the heat until T b >T C Close the cycle at +6°C; Step S10: When the temperature is too low in winter, the night temperature of the shed is T y Lower than the minimum value T that crops can withstand n When the emergency heating rod of the water storage tank (20) is turned on, the medium circulation between the water storage tank (20) of the shade shed and the heat storage device (5) is turned on to dissipate heat, and the heating is continued until T y >T n +2℃.

2. The control method of a low-carbon yin-yang type solar greenhouse according to claim 1, characterized in that: The method for adjusting the ventilation windows and fans in step S3 is as follows: first open 1 / 2 of the fans and 1 / 2 of the ventilation windows, and the initial opening of the ventilation windows is 60%; after running for 10 minutes, detect the CO2 concentration C y and CO2 concentration in the shade shed C b Is the decreasing speed of the difference less than 5%? If so, increase the opening of the ventilation window by 20% until the opening is 100%. If the decreasing speed of the difference is still less than 5%, increase the number of ventilation windows and fans until all ventilation windows are fully opened. If the decreasing speed of the difference is still less than 5%, increase the speed of the fan. The method for adjusting the ventilation windows and fans in step S5 is as follows: turn on 1 / 2 of the fans and 1 / 2 of the ventilation windows, with the initial opening of the ventilation windows being 60%; and check the shed temperature T every 10 minutes. y For every 1°C increase, the ventilation window opening increases by 10%. After reaching 100%, increase the number of ventilation windows and the number of fans opened until all ventilation windows are fully open, and increase the number or speed of fans opened.

3. The control method of a low-carbon yin-yang type solar greenhouse according to claim 1, characterized in that: The shady shed (2) and the sun shed (1) comprise a common partition wall (8) and a supporting frame extending from the top of the partition wall in the north-south direction, respectively; the ventilation window (14) is provided with an automatic rolling curtain device; the fan (13) is a permanent magnet fan; the sun shed (1) is provided with a plurality of solar water heaters (4) at a position close to the shed film; the shady shed (2) is provided with a water storage tank (20) at a position close to the shed film along the length direction of the shady shed; an electromagnetic switch valve I (18) and a circulation pump are provided on the connecting pipe between the solar water heater (4) and the water storage tank (20); a three-way valve (19) and a circulation pump are provided on the connecting pipe between the water storage tank (20) and the heat dissipation device (6) and the heat storage device (5); an electromagnetic switch valve II (10) and a water pump (9) are provided on the return water pipe connecting the waste heat recovery device (3) and the underground temperature storage device (7); and an electromagnetic switch valve III (11) and an electromagnetic switch valve IV (12) are provided on the two water supply pipes connecting the waste heat recovery device (3) and the underground temperature storage device (7).

4. The control method of a low-carbon yin-yang type solar greenhouse according to claim 3 is characterized in that: The control system is electrically connected to the waste heat recovery device (3), the temperature and humidity sensor, the temperature sensor, the oxygen sensor, the CO2 sensor, all the electromagnetic switch valves inside the greenhouse, the three-way valve (19), the water pump, the circulation pump, the permanent magnet fan and the automatic rolling curtain device.

5. The control method of a low-carbon yin-yang type solar greenhouse according to claim 1, characterized in that: The waste heat recovery device (3) comprises a box body provided with an air inlet and an air outlet, an air-water heat exchange device is arranged inside the box body, a side plate of the box body is arranged obliquely and faces the greenhouse lighting surface, the inclined side plate of the box body is a black heat absorbing plate, and the air-water heat exchange device is connected to the underground temperature storage device through a set of water channels.

6. The control method of a low-carbon yin-yang type solar greenhouse according to claim 5, characterized in that: A heat collecting plate is laid inside the inclined side plate of the box body, and the internal water channel of the heat collecting plate is connected in parallel with the air-water heat exchange device and is connected to the underground temperature storage device (7) through the water channel.

7. The control method of a low-carbon yin-yang type solar greenhouse according to claim 1, characterized in that: The heat storage device (5) comprises a black heat storage wall fixed on the sunny partition wall, and the heat dissipation device (6) comprises a water wall fixed on the shady partition wall. Both the black heat storage wall and the water wall comprise a plurality of heat storage units connected in series and a water outlet pipe and a water return pipe, and the water outlet pipe and the water return pipe are connected to the water storage tank (20).

8. The control method of a low-carbon yin-yang type solar greenhouse according to claim 3, characterized in that: An embedded automatic rolling curtain device is arranged in the ventilation window (14), and the automatic rolling curtain device comprises a square mounting frame (17) and a rolling curtain piece (16), the upper frame (15) of the mounting frame is a mounting box for a motor and a rolling curtain tube, and a moving guide rail for the rolling curtain piece is arranged between the left and right frames of the mounting frame.

9. The control method of a low-carbon yin-yang type solar greenhouse according to claim 1, characterized in that: The control system sets different temperature, humidity and CO2 concentration thresholds for shade sheds and sun sheds according to the growing season, habits and light conditions of the crops planted. hy1 T is the suitable temperature for crops to grow in the sun shed during the day. hy2 It is the lower value between the maximum temperature limit for crops in the sun shed during the day and the fixed value of 28℃. Tc is the minimum temperature limit for crops in the shade shed at night.

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