Linkage ventilation and temperature control system for sunlight greenhouse

Abstract

The utility model relates to the technical field of agricultural greenhouses, and discloses a solar greenhouse linkage ventilation temperature control system which comprises a greenhouse, a sensor unit, a natural ventilation unit, a forced ventilation unit, an automatic control unit and a manual control unit. The automatic control unit receives signals of solar radiation, temperature, limiters and other sensors and outputs the signals to the corresponding relays according to judgment, the relays control starting and stopping of the driving motors and the fans, and the automatic control unit can control ventilation of all adjacent similar greenhouses at the same time. Linkage utilization of the sensor unit and the automatic control unit in a plurality of greenhouses is achieved, the sensor unit feeds back signals to the automatic control unit in real time, the automatic control unit controls and adjusts the natural ventilation unit and the forced ventilation unit in real time, and finally dynamic stable control over the indoor thermal environments of the adjacent greenhouses of the same kind is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural greenhouses, in particular to a linked ventilation and temperature control system for a solar greenhouse. Background Art

[0002] As global climate change and resource shortage issues become increasingly prominent, how to effectively utilize and regulate the greenhouse environment and improve the growth efficiency and quality of crops has become an important research direction in the agricultural field. As an important agricultural facility, solar greenhouses can provide a relatively stable growth environment, allowing crops to get rid of the constraints of natural climate to a certain extent, thereby meeting the needs of modern agriculture for high yield, high efficiency and high quality. Ventilation, as a key factor in regulating the internal environment of the greenhouse, directly affects the growth and yield of crops in the greenhouse.

[0003] At present, there are several problems with the ventilation of solar greenhouses: the ventilation of solar greenhouses still relies on manual operation, which is time-consuming and labor-intensive, and to a certain extent not only increases the labor intensity but also reduces the response speed of the ventilation system; most of the solar greenhouse ventilation systems are independently controlled, and it is costly and inconvenient to maintain to equip a separate ventilation control system; some ventilation systems are complex to control and not very practical, and various problems are prone to occur in the actual production process.

[0004] Through existing research, it is found that the indoor thermal environment changes of adjacent solar greenhouses of the same type are basically the same. Therefore, a linkage ventilation and temperature control system that can automatically monitor and adjust the thermal environment of the solar greenhouse is developed. The ventilation system shares a set of sensors and automatic controllers, which can realize the linkage ventilation control of multiple adjacent greenhouses. The ventilation control system has low cost, reliable control, and simple operation, and has a significant effect on improving the ventilation and temperature control of solar greenhouses. Utility Model Content

[0005] The utility model provides a sunlight greenhouse linkage ventilation and temperature control system to solve the problems in the prior art.

[0006] The technical problem solved by the utility model is achieved by the following technical solutions:

[0007] A solar greenhouse linkage ventilation and temperature control system, comprising a greenhouse, and further comprising:

[0008] A sensor unit, wherein the sensor unit comprises a solar radiation meter and a temperature sensor installed in the greenhouse, wherein a vent is provided on the greenhouse, and a limit sensor is installed on the vent;

[0009] A natural ventilation unit, the natural ventilation unit comprising an automatic rolling curtain part and an automatic rolling film part installed on the vent;

[0010] A forced ventilation unit, the forced ventilation unit comprising fans installed on both sides of the greenhouse;

[0011] An automatic control unit, the automatic control unit comprising a controller and a relay electrically connected to the controller, the automatic control unit being electrically connected to a sensor unit, a natural ventilation unit, and a forced ventilation unit;

[0012] A manual control unit has an independent control line connecting the drive motor of the natural ventilation unit and the fan of the forced ventilation unit.

[0013] In a specific embodiment, the ventilation openings include upper ventilation openings opened at the upper end of the greenhouse and lower ventilation openings opened at the lower end of the greenhouse.

[0014] In a specific embodiment, the automatic rolling curtain part is installed on the upper vent, and the automatic rolling curtain part includes an upper vent drive motor and a rolling curtain shaft connected to the output end of the upper vent drive motor, the rolling curtain is set on the rolling curtain shaft, and the upper vent drive motor is electrically connected to the relay corresponding to the automatic control unit.

[0015] In a specific embodiment, the automatic film rolling unit is installed on the lower vent, and the automatic film rolling unit includes a lower vent drive motor and a film rolling shaft connected to the output end of the lower vent drive motor, the film is set on the film rolling shaft, and the lower vent drive motor is electrically connected to the relay corresponding to the automatic control unit.

[0016] In a specific implementation manner, the fan includes a right fan installed on the right side of the greenhouse and a left fan installed on the left side of the greenhouse, and the right fan and the left fan are electrically connected to relays corresponding to the automatic control unit respectively.

[0017] The beneficial effects of the utility model are:

[0018] The automatic control unit receives signals from sensors such as solar radiation, temperature, and limit switches, and outputs signals to corresponding relays based on judgment. The relays control the start and stop of the drive motor and fan. The automatic control unit can simultaneously control the ventilation of all similar adjacent greenhouses, realizing the linkage use of the sensor unit and the automatic control unit in multiple greenhouses. The sensor unit feeds back signals to the automatic control unit in real time, and the automatic control unit makes real-time control adjustments to the natural ventilation unit and the forced ventilation unit, ultimately achieving dynamic and stable control of the indoor thermal environment of multiple similar adjacent greenhouses. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation scheme of the utility model or the technical scheme in the prior art, the drawings required for use in the implementation scheme or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation schemes of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a schematic diagram of the system principle of the utility model.

[0021] Figure 2 It is a schematic diagram of the system structure of the utility model.

[0022] In the figure: 1. sensor unit; 2. solar radiation meter; 3. temperature sensor; 4. limit sensor; 5. distribution box; 6. lower vent drive motor; 7. film rolling shaft; 8. manual control unit; 9. right fan; 10. left fan; 11. forced ventilation unit; 12. relay; 13. natural ventilation unit; 14. upper vent drive motor; 15. roller blind shaft; 16. automatic control unit; 17. upper vent; 18. lower vent. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] Reference Figure 1-2 As shown, the utility model provides a sunlight greenhouse linkage ventilation and temperature control system, including a greenhouse, and also including:

[0031] The sensor unit 1 includes a solar radiation meter 2 and a temperature sensor 3 installed in the greenhouse. A vent is provided on the greenhouse, and a limit sensor 4 is installed on the vent. The solar radiation meter 2 receives solar radiation and converts it into an electrical signal. The temperature sensor 3 converts the temperature signal into an electrical signal. The limit sensor 4 converts the mechanical signal into an electrical signal, thereby realizing signal conversion and transmission.

[0032] A natural ventilation unit 13, the natural ventilation unit 13 includes an automatic rolling curtain part and an automatic rolling film part installed on the vent;

[0033] A forced ventilation unit 11, the forced ventilation unit 11 comprises fans installed on both sides of the greenhouse;

[0034] The automatic control unit 16 includes a controller and a relay 12 electrically connected to the controller. The automatic control unit 16 is electrically connected to the sensor unit 1, the natural ventilation unit 13 and the forced ventilation unit 11. The automatic control unit 16 receives signals from sensors such as solar radiation, temperature, and a limiter, and outputs signals to the corresponding relay 12 according to the judgment. The relay 12 controls the start and stop of the drive motor and the fan. The automatic control unit 16 can simultaneously control the ventilation of all similar greenhouses in the vicinity, realizing the linkage utilization of the sensor unit 1 and the automatic control unit 16 in multiple greenhouses;

[0035] A manual control unit 8, the manual control unit 8 has an independent control line connecting the drive motor of the natural ventilation unit 13 and the fan of the forced ventilation unit 11. Each solar greenhouse is equipped with an independent manual control unit 8, and the manual control unit 8 has an independent control line connecting the drive motor and the fan. When encountering special circumstances, the start and stop of the drive motor and the fan can be manually controlled. The sensor unit 1 feeds back signals to the automatic control unit 16 in real time, and the automatic control unit 16 makes control adjustments to the natural ventilation unit 13 and the forced ventilation unit 11 in real time, and finally realizes dynamic and stable control of the indoor thermal environment of multiple adjacent similar greenhouses.

[0036] As a further preferred embodiment of the above embodiment, the ventilation openings include upper ventilation openings 17 opened at the upper end of the greenhouse and lower ventilation openings 18 opened at the lower end of the greenhouse.

[0037] As a further preference of the above embodiment, the automatic rolling curtain part is installed on the upper vent 17, and the automatic rolling curtain part includes an upper vent drive motor 14 and a rolling curtain shaft 15 connected to the output end of the upper vent drive motor 14, and the rolling curtain is arranged on the rolling curtain shaft 15, and the upper vent drive motor 14 is electrically connected to the relay 12 corresponding to the automatic control unit 16.

[0038] The automatic film rolling unit is installed on the lower vent 18, and the automatic film rolling unit includes a lower vent drive motor 6 and a film rolling shaft 7 connected to the output end of the lower vent drive motor 6. The film is set on the film rolling shaft 7, and the lower vent drive motor 6 is electrically connected to the relay 12 corresponding to the automatic control unit 16.

[0039] The upper vent drive motor 14 is electrically connected to the relay 12 corresponding to the automatic control unit 16, and the relay 12 controls the start and stop of the upper vent drive motor 14 to drive the rolling curtain shaft 15 and control the size of the upper vent 17; the lower vent drive motor 6 is electrically connected to the relay 12 corresponding to the automatic control unit 16, and the relay 12 controls the start and stop of the upper vent drive motor 6 to drive the film rolling shaft 7 and control the size of the lower vent 18.

[0040] As a further preference of the above embodiment, the fan includes a right fan 9 installed on the right side of the greenhouse and a left fan 10 installed on the left side of the greenhouse. The right fan 9 and the left fan 10 are electrically connected to the relays 12 corresponding to the automatic control unit 16 respectively. The fan is connected to the corresponding relay 12. The relay 12 controls the start and stop of the fan. The fan rotates to transport the indoor hot air to the outdoors, forming a negative pressure indoors, and the outdoor air enters to achieve ventilation and temperature control.

[0041] The working principle of a solar greenhouse linkage ventilation and temperature control system is as follows:

[0042] 1. First, the distribution box 5 is connected to the automatic control unit 16 and the relay 12, and the corresponding switches in the distribution box 5 supply power to each unit. Generally, the power of the manual control unit 8 is disconnected, and is connected when manual control is required.

[0043] 2. According to the outdoor meteorological conditions of the solar greenhouse and the types of crops grown, set the appropriate temperature range and the upper and lower limits of the solar irradiance in the automatic control unit 16, and set the time interval for adjusting ventilation during operation. The system defaults to adjusting once every 5 minutes. When the automatic control unit 16 receives the temperature signal from the temperature sensor 3 within the set temperature range and the solar irradiance is lower than the set lower limit, the system does not make any adjustments.

[0044] 3. When the temperature signal received by the automatic control unit 16 from the temperature sensor 3 reaches the set temperature upper limit and the illuminance monitored by the solar radiation meter 2 is stably increased, the automatic control unit 16 controls the relay 12 connected to the upper vent drive motor 14 to work, and the upper vent drive motor 14 of the natural ventilation unit 13 drives the roller shutter shaft 15 to rotate, and the upper vent 17 is opened. The automatic control unit 16 compares the temperature value monitored by the temperature sensor with the set temperature value every 5 minutes. If the indoor temperature is still higher than the set temperature upper limit, the upper vent drive motor 14 will continue to be started to open the air outlet. The upper vent limit sensor 4 will provide real-time feedback on the opening size of the upper vent 17. When the opening is maximum, the automatic control unit 16 controls the corresponding relay 12 to stop the upper vent drive motor 14.

[0045] 4. When the upper vent 17 is opened to the maximum and the indoor temperature is still higher than the set temperature upper limit, the automatic control unit 16 continues to control the relay 12 connected to the lower vent drive motor 6 to work, and the lower vent drive motor 6 of the natural ventilation unit 13 drives the film rolling shaft 7 to rotate, and the lower vent 18 opens. The automatic control unit 16 compares the temperature value monitored by the temperature sensor 3 with the set temperature value every 5 minutes. If the indoor temperature is still higher than the set temperature upper limit, the lower vent drive motor 6 will continue to be started to open the air outlet. The lower vent limit sensor 4 will provide real-time feedback on the opening size of the lower vent 18. When the opening is maximum, the automatic control unit 16 controls the lower vent drive motor 6 to stop running.

[0046] 5. When the lower vent 18 is opened to the maximum and the indoor temperature is still higher than the set temperature upper limit, the automatic control unit 16 continues to control the relay 12 connected to the fan to work, and the right fan 9 and the left fan 10 in the forced ventilation unit 11 are started to start forced ventilation until the temperature drops to a preset temperature range; if the temperature does not drop after the fan has been running for a long time and the solar irradiance exceeds the upper limit threshold, the control system will issue an alarm, and the sunshade device needs to be opened manually.

[0047] 6. When both the upper and lower vents are open and the fan is started, when the temperature signal received by the temperature sensor 3 by the automatic control unit 16 is lower than the set lower temperature limit and the illuminance monitored by the solar radiation instrument 2 continues to decrease, the automatic control unit 16 first controls the relay 12 to stop the fan, and the automatic control unit 16 compares the temperature value monitored by the temperature sensor with the set temperature value every 5 minutes. If the indoor temperature is still lower than the set upper temperature limit, the lower vent drive motor 6 will continue to be started to close the vent, and the lower vent limit sensor 4 will provide real-time feedback on the opening size of the lower vent 18. When the lower vent is completely closed, the automatic control unit 16 controls the relay 12 connected to the lower vent drive motor 6 to disconnect, and the lower vent drive motor 6 stops running; similarly, when the lower vent is completely closed, the upper vent 17 also performs the above adjustment process until the upper vent 17 is also completely closed. If the temperature is still decreasing, it is necessary to manually start the lifting and lowering device of the insulation blanket to lower the insulation blanket for insulation.

[0048] 7. During the automatic control process, if a problem occurs in one of the linked controlled greenhouses or ventilation needs to be controlled separately, the distribution box 5 is connected to the manual control unit 8 for manual control; automatic control or manual control is switched by the user. The number of greenhouses controlled by the system can be increased or decreased according to the actual situation.

[0049] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A solar greenhouse linked ventilation and temperature control system, comprising a greenhouse, characterized in that: Also includes: A sensor unit (1), the sensor unit (1) comprising a solar radiation meter (2) and a temperature sensor (3) installed in the greenhouse, a vent opening being provided on the vent opening, and a limit sensor (4) being installed on the vent opening; A natural ventilation unit (13), the natural ventilation unit (13) comprising an automatic rolling curtain part and an automatic rolling film part installed on the ventilation opening; A forced ventilation unit (11), the forced ventilation unit (11) comprising fans installed on both sides of the greenhouse; An automatic control unit (16), the automatic control unit (16) comprising a controller and a relay (12) electrically connected to the controller, the automatic control unit (16) being electrically connected to the sensor unit (1), the natural ventilation unit (13) and the forced ventilation unit (11); A manual control unit (8), wherein the manual control unit (8) has an independent control line connecting the drive motor of the natural ventilation unit (13) and the fan of the forced ventilation unit (11).

2. A solar greenhouse linked ventilation and temperature control system according to claim 1, characterized in that: The ventilation openings include an upper ventilation opening (17) opened at the upper end of the greenhouse and a lower ventilation opening (18) opened at the lower end of the greenhouse.

3. A solar greenhouse linked ventilation and temperature control system according to claim 2, characterized in that: The automatic rolling curtain section is installed on the upper vent (17), and comprises an upper vent drive motor (14) and a rolling curtain shaft (15) connected to the output end of the upper vent drive motor (14); the rolling curtain is arranged on the rolling curtain shaft (15); and the upper vent drive motor (14) is electrically connected to a relay (12) corresponding to an automatic control unit (16).

4. A solar greenhouse linked ventilation and temperature control system according to claim 3, characterized in that: The automatic film rolling unit is installed on the lower vent (18), and the automatic film rolling unit includes a lower vent drive motor (6) and a film rolling shaft (7) connected to the output end of the lower vent drive motor (6), the film roll is arranged on the film rolling shaft (7), and the lower vent drive motor (6) is electrically connected to a relay (12) corresponding to the automatic control unit (16).

5. A solar greenhouse linked ventilation and temperature control system according to claim 4, characterized in that: The fan comprises a right fan (9) installed on the right side of the greenhouse and a left fan (10) installed on the left side of the greenhouse, and the right fan (9) and the left fan (10) are electrically connected to relays (12) corresponding to the automatic control unit (16) respectively.

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