CN113692894A - Intelligent temperature control system for greenhouse - Google Patents
Intelligent temperature control system for greenhouse Download PDFInfo
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- CN113692894A CN113692894A CN202110972024.3A CN202110972024A CN113692894A CN 113692894 A CN113692894 A CN 113692894A CN 202110972024 A CN202110972024 A CN 202110972024A CN 113692894 A CN113692894 A CN 113692894A
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- ventilation device
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- shed
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- 238000009423 ventilation Methods 0.000 claims abstract description 199
- 238000001514 detection method Methods 0.000 claims abstract description 166
- 230000001174 ascending effect Effects 0.000 claims abstract description 45
- 238000005286 illumination Methods 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000005507 spraying Methods 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 description 6
- 239000011521 glass Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000008635 plant growth Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/246—Air-conditioning systems
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/22—Shades or blinds for greenhouses, or the like
- A01G9/227—Shades or blinds for greenhouses, or the like rolled up during non-use
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/14—Measures for saving energy, e.g. in green houses
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Greenhouses (AREA)
Abstract
The invention discloses an intelligent temperature control system for a greenhouse, which comprises a controller and the greenhouse, wherein a top ventilation device, a plurality of side ventilation devices, a plurality of paths of internal fans and a temperature sensor are arranged in the greenhouse; judging whether the current temperature detection value in the shed is higher than a preset second temperature threshold value, wherein the first temperature threshold value is lower than the second temperature threshold value, and if so, controlling the opening of one path of internal fan by the controller; and if the current temperature detection value in the shed after the one path of internal fan is started still has an ascending trend, the controller controls the remaining at least one path of internal fan to be started. The technical scheme provided by the invention conforms to the greenhouse temperature control logical relation, and the greenhouse temperature is controlled by combining meteorological information, so that the greenhouse temperature control system is energy-saving, environment-friendly, timely, efficient, accurate and intelligent.
Description
Technical Field
The invention relates to the technical field of greenhouses, in particular to an intelligent temperature control system for a greenhouse.
Background
Greenhouse temperature is an important influence factor of plant growth in a greenhouse, abnormal temperature can cause abnormal growth of plants, and the greenhouse temperature needs to be monitored in real time in order to be controlled timely and efficiently.
Because the temperature of the greenhouse is controlled and adjusted through manual observation, the problems of hysteresis, low efficiency and the like exist, the abnormal temperature of the greenhouse cannot be timely treated, and the growth of plants in the greenhouse is not facilitated.
Disclosure of Invention
In view of the above, it is necessary to provide an intelligent temperature control system for a greenhouse, which can automatically monitor the temperature of the greenhouse, adjust the temperature in time, and is efficient and accurate. The technical scheme provided by the invention is as follows:
the invention provides an intelligent temperature control system for a greenhouse, which comprises:
a controller, which is preset with a plurality of temperature thresholds;
the greenhouse comprises a top ventilation device, a plurality of side ventilation devices and a plurality of paths of internal fans (namely barrel fans), wherein the top ventilation device, the side ventilation devices and the paths of internal fans can be opened or closed under the control of the controller;
the temperature sensor is arranged in the greenhouse and used for detecting the temperature in the greenhouse in real time or at regular time, and the temperature sensor is electrically connected with the input end of the controller and used for sending a temperature detection value in the greenhouse to the controller;
the controller inquires current weather information, and if the current weather information is free of rain and snow and the temperature detection value in the shed is higher than a preset first temperature threshold value, the controller controls the top ventilation device and the side ventilation device to be started; judging whether the current temperature detection value in the shed is higher than a preset second temperature threshold value, wherein the first temperature threshold value is lower than the second temperature threshold value, and if so, controlling one path of internal fan to be started by the controller; and if the current temperature detection value in the shed after one of the internal fans is started still has an ascending trend, the controller controls the remaining internal fans to be started.
Further, if the current weather information contains rain and snow, the controller judges whether the state of the top ventilation device is in an open state or a closed state:
if the top ventilation device is in a closed state, the controller acquires a current temperature detection value in the shed and compares the current temperature detection value with the second temperature threshold, and if the current temperature detection value in the shed is higher than the second temperature threshold, the controller controls one path of internal fan to be opened;
if the top ventilation device is in an open state, the controller controls the top ventilation device to be closed, obtains a current temperature detection value in the shed and compares the current temperature detection value with the second temperature threshold, and if the current temperature detection value in the shed is higher than the second temperature threshold, the controller controls one path of internal fans to be opened.
Further, if the current weather information includes rain and snow, the controller further determines whether the side ventilation device is in an open state or a closed state:
if the side ventilation device is in an open state, the current wind direction and wind speed information are judged, and if the wind speed reaches a preset wind speed threshold value, the controller controls the side ventilation device matched with the current wind direction information to be closed.
Further preferably, before comparing the current intra-canopy temperature detection value with the second temperature threshold, the method further includes:
if the top ventilation device is in a closed state, the controller acquires a current temperature detection value in the shed and compares the current temperature detection value with the first temperature threshold value, and if the current temperature detection value in the shed is higher than the first temperature threshold value, the controller controls the corresponding side ventilation device to be opened according to the current wind direction and wind speed information;
if the top ventilation device and the side ventilation devices are both in an open state, the controller controls the top ventilation device to be closed and simultaneously controls the corresponding side ventilation devices to be closed according to the current wind direction and wind speed information;
if the top ventilation device is in an open state and the side ventilation device is in a closed state, the controller controls the top ventilation device to be closed.
Preferably, the controller controls the top and side ventilation devices to be opened, and the controller comprises the following steps:
the controller controls the top ventilation device and the side ventilation device to be respectively opened to the maximum opening degree at one time, or the controller controls the top ventilation device and the side ventilation device to be respectively opened gradually until the maximum opening degree is reached.
Preferably, the controller controls the top and side ventilation devices to be opened, and the controller comprises the following steps:
if the temperature detection value in the shed is higher than the first temperature threshold value, the controller controls the top ventilation device and the side ventilation device to be synchronously opened to one fourth of the maximum opening degree of the top ventilation device and the side ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device and the side ventilation device to be synchronously opened to be one half of the maximum opening degree of the top ventilation device and the side ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device and the side ventilation device to be synchronously opened to three quarters of the maximum opening degree of the top ventilation device and the side ventilation device; and if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device and the side ventilation device to be synchronously opened to the respective maximum opening degrees.
Preferably, the controller controls the top and side ventilation devices to be opened, and the controller comprises the following steps:
if the temperature detection value in the shed is higher than a preset first temperature threshold value, the controller controls the top ventilation device to be opened to one fourth of the maximum opening degree of the top ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device to be opened to be one half of the maximum opening degree of the top ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device to be opened to three-quarters of the maximum opening degree; if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device to be opened to the maximum opening degree;
if the current temperature detection value in the shed has an ascending trend, the controller controls the side ventilation device to be opened to one fourth of the maximum opening degree of the side ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the side ventilation device to be opened to be one half of the maximum opening degree of the side ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the side ventilation device to be opened to three-quarters of the maximum opening degree; and if the current temperature detection value in the shed has an ascending trend, the controller controls the side ventilation device to be opened to the maximum opening degree.
Further, the big-arch shelter still includes:
the outdoor temperature detection device is arranged outside the greenhouse and used for detecting the temperature outside the greenhouse in real time or at regular time, and the outdoor temperature detection device is electrically connected with the input end of the controller and used for sending an outdoor temperature detection value to the controller;
the water curtain and the multi-path negative pressure fan can be opened or closed under the control of the controller;
after the controller controls the opening of at least one path of the rest internal fans, the method further comprises the following steps:
judging whether the current temperature detection value in the shed is higher than a preset third temperature threshold value or not, and whether the temperature detection value outside the shed is higher than a fourth temperature threshold value or not, wherein the third temperature threshold value is higher than the second temperature threshold value, and the fourth temperature threshold value is lower than the third temperature threshold value, if so, the controller controls the top ventilation device and the side ventilation devices adjacent to the negative-pressure fans to be all closed, and controls one negative-pressure fan to be opened; if the current temperature detection value in the shed after one of the negative pressure fans is started has a rising trend, and the temperature detection value outside the shed is higher than the fourth temperature threshold value, the controller controls the water curtain and the remaining one of the negative pressure fans to be started; and if the current temperature detection value in the shed after the water curtain and the remaining one of the negative pressure fans are started has an ascending trend, and the temperature detection value outside the shed is higher than the fourth temperature threshold value, the controller controls the remaining at least one of the negative pressure fans to be started.
The greenhouse further comprises an outer sunshade curtain and an illumination sensor electrically connected with the input end of the controller, the outer sunshade curtain can be opened or closed under the control of the controller, and the illumination sensor is used for detecting the illumination intensity in the greenhouse in real time or at regular time and sending the illumination intensity detection value to the controller; if the illumination intensity detection value is higher than a preset illumination intensity threshold value, the controller controls the outer sunshade curtain to be opened;
or,
before judging whether temperature detect value is higher than preset third temperature threshold in current canopy, still include: and judging whether the current temperature detection value in the greenhouse is higher than a preset fifth temperature threshold value, wherein the fifth temperature threshold value is lower than the third temperature threshold value, and if so, controlling the outer sun-shading curtain to be opened by the controller.
Further, the greenhouse also comprises an inner sunshade curtain, and the inner sunshade curtain can be opened or closed under the control of the controller;
if the current illumination intensity detection value after the outer sunshade curtain is opened is higher than a preset illumination intensity threshold value, the controller controls the inner sunshade curtain to be opened;
or,
after all negative-pressure air blowers are started, the method further comprises the following steps: and judging whether the current temperature detection value in the greenhouse is higher than the third temperature threshold value, if so, controlling the opening of the inner sunshade curtain by the controller.
Preferably, the top ventilation device is a top film or a top window, and the side ventilation device is a side film or a side window.
Further, the greenhouse also comprises spraying, and the spraying can be started or closed under the control of the controller;
and if the current temperature detection value in the shed after all the negative pressure fans are started has an ascending trend, the controller controls the spraying to be started.
The invention has the following advantages:
a) the temperature of the greenhouse is controlled by combining meteorological information, and the greenhouse temperature control logic relation is met, so that the energy is saved and the environment is protected;
b) the temperature in the greenhouse is monitored in real time through the temperature sensor, so that the temperature in the greenhouse can be automatically and efficiently adjusted;
c) and the factors influencing the temperature change are further determined by utilizing the illumination sensor, so that the control is accurate and more intelligent.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a first flowchart of an intelligent temperature control system for greenhouses according to an embodiment of the present invention;
fig. 2 is a second flowchart of the intelligent temperature control system for greenhouses according to the embodiment of the present invention;
fig. 3 is a third flowchart of the intelligent temperature control system for greenhouses according to the embodiment of the present invention;
fig. 4 is a fourth operation flowchart of the intelligent temperature control system for greenhouses according to the embodiment of the present invention;
fig. 5 is a fifth flowchart of the intelligent temperature control system for greenhouses according to the embodiment of the present invention;
fig. 6 is a sixth flowchart of the intelligent temperature control system for greenhouses according to the embodiment of the present invention;
fig. 7 is a seventh flowchart of the intelligent temperature control system for greenhouses according to the embodiment of the present invention;
fig. 8 is an eighth flowchart of the intelligent temperature control system for greenhouses according to the embodiment of the present invention;
fig. 9 is a ninth work flow chart of the intelligent temperature control system for greenhouses according to the embodiment of the present invention;
fig. 10 is a tenth flowchart of the intelligent temperature control system for greenhouses according to the embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood and more clearly understood by those skilled in the art, the technical solutions of the embodiments of the present invention will be described below in detail and completely with reference to the accompanying drawings. It should be noted that the implementations not shown or described in the drawings are in a form known to those of ordinary skill in the art. Additionally, while exemplifications of parameters including particular values may be provided herein, it is to be understood that the parameters need not be exactly equal to the respective values, but may be approximated to the respective values within acceptable error margins or design constraints. It is to be understood that the described embodiments are merely exemplary of a portion of the invention and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In addition, the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this invention, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In one embodiment of the invention, an intelligent temperature control system for a greenhouse is provided, and the system comprises a controller and the greenhouse. Wherein a plurality of temperature thresholds are preset in the controller; the greenhouse comprises a plurality of ventilation devices and a plurality of paths of internal fans, wherein the ventilation devices comprise a top ventilation device and a plurality of side ventilation devices, and the top ventilation device, the side ventilation devices and the internal fans can be opened or closed under the control of the controller; the greenhouse is characterized in that a temperature sensor is further arranged inside the greenhouse and used for detecting the temperature inside the greenhouse in real time or at regular time, and the temperature sensor is electrically connected with the input end of the controller and used for sending a temperature detection value in the greenhouse to the controller. It should be noted that the temperature sensor may automatically send the detected temperature value to the controller, or may send the detected temperature value to the controller in response to a query command from the controller, which is not intended to limit the scope of the present invention.
The invention provides two different ventilation devices, one is a greenhouse film, and the other is a glass window, namely, the top ventilation device is a top film or a top window, and the side ventilation device is a side film or a side window. For the glass window, the glass window is opened in the opening state, and the glass window is closed in the closing state; for the greenhouse film, the open state means rolling the greenhouse film, and the closed state means unfolding the greenhouse film.
For each ventilation device, there are two different opening modes:
one is a one-time full open, specifically, in one embodiment of the invention, the controller controlling the top and side register to open comprises the steps of: the controller controls the top ventilation device and the side ventilation device to be opened to the maximum opening degree at one time respectively.
The other is to open the top ventilation device and the side ventilation device for a plurality of times to the maximum opening degree, and in one embodiment of the invention, the controller controls the top ventilation device and the side ventilation device to open the top ventilation device and the side ventilation device, and the method comprises the following steps: and the controller controls the top ventilation device and the side ventilation device to be gradually opened respectively until the maximum opening degree is reached.
For all the ventilators, the opening sequence of the top and side ventilators is of two types:
in one embodiment of the present invention, specifically, as shown in fig. 2, the controller controls the top ventilation device and the side ventilation device to be opened simultaneously, and the method comprises the following steps: if the temperature detection value in the shed is higher than a preset first temperature threshold value, the controller controls the top ventilation device and the side ventilation device to be synchronously opened to one fourth of the maximum opening degree of the top ventilation device and the side ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device and the side ventilation device to be synchronously opened to be one half of the maximum opening degree of the top ventilation device and the side ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device and the side ventilation device to be synchronously opened to three quarters of the maximum opening degree of the top ventilation device and the side ventilation device; and if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device and the side ventilation device to be synchronously opened to the respective maximum opening degrees.
In another embodiment, as shown in fig. 3, the controller controls the top ventilation device and the side ventilation device to be opened, including the following steps: if the temperature detection value in the shed is higher than a preset first temperature threshold value, the controller controls the top ventilation device to be opened to one fourth of the maximum opening degree of the top ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device to be opened to be one half of the maximum opening degree of the top ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device to be opened to three-quarters of the maximum opening degree; if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device to be opened to the maximum opening degree; if the current temperature detection value in the shed has an ascending trend, the controller controls the side ventilation device to be opened to one fourth of the maximum opening degree of the side ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the side ventilation device to be opened to be one half of the maximum opening degree of the side ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the side ventilation device to be opened to three-quarters of the maximum opening degree; and if the current temperature detection value in the shed has an ascending trend, the controller controls the side ventilation device to be opened to the maximum opening degree.
Specifically, in this embodiment, as shown in fig. 1, the controller queries current weather information, and if the current weather information is free of rain and snow, and the temperature detection value in the greenhouse is higher than a preset first temperature threshold, the controller controls the top ventilation device and the side ventilation device to be turned on; judging whether the current temperature detection value in the shed is higher than a preset second temperature threshold value, wherein the first temperature threshold value is lower than the second temperature threshold value, and if the current temperature detection value in the shed is higher than the preset second temperature threshold value, the controller controls one path of internal fans to be started; and if the current temperature detection value in the shed after one of the internal fans is started still has an ascending trend, the controller controls the remaining internal fans to be started.
As shown in fig. 4, the controller queries the current weather information, and if the current weather information contains rain and snow, the controller determines whether the state of the top ventilation device is in an open state or a closed state:
if the top ventilation device is in a closed state, the controller acquires a current temperature detection value in the shed and compares the current temperature detection value with the second temperature threshold, and if the current temperature detection value in the shed is higher than the second temperature threshold, the controller controls one path of internal fan to be opened;
if the top ventilation device is in an open state, the controller controls the top ventilation device to be closed, obtains a current temperature detection value in the shed and compares the current temperature detection value with the second temperature threshold, and if the current temperature detection value in the shed is higher than the second temperature threshold, the controller controls one path of internal fans to be opened.
Furthermore, as shown in fig. 5, if the current weather information includes rain and snow, and the top ventilation device is in the open state, the controller further determines whether the side ventilation device is in the open state or the closed state:
if the side ventilation device is in an open state, judging current wind direction and wind speed information, and if the wind speed reaches a preset wind speed threshold, controlling the side ventilation device matched with the current wind direction information to be closed by the controller;
and if the side ventilation device is in a closed state, the controller acquires a current temperature detection value in the shed and compares the current temperature detection value with the second temperature threshold, and if the current temperature detection value in the shed is higher than the second temperature threshold, the controller controls one path of internal fan to be opened.
In addition, in an embodiment of the present invention, before comparing the current intra-canopy temperature detection value with the second temperature threshold value, the method further includes:
as shown in fig. 6, if the top ventilation device is in a closed state, the controller obtains a current temperature detection value in the greenhouse and compares the current temperature detection value with the first temperature threshold, and if the current temperature detection value in the greenhouse is higher than the first temperature threshold, the controller controls the corresponding side ventilation device to be opened according to the current wind direction and wind speed information;
if the top ventilation device and the side ventilation devices are both in an open state, the controller controls the top ventilation device to be closed and simultaneously controls the corresponding side ventilation devices to be closed according to the current wind direction and wind speed information;
if the top ventilation device is in an open state and the side ventilation devices are in a closed state, the controller controls the top ventilation device to be closed and simultaneously controls the corresponding side ventilation devices to be opened according to the current wind direction and wind speed information.
In an embodiment of the invention, an intelligent temperature control system for a greenhouse is provided, the greenhouse further comprises an external temperature detection device, a water curtain and a multi-path negative pressure fan, wherein the external temperature detection device is arranged outside the greenhouse and is used for detecting the external temperature of the greenhouse in real time or at regular time, and the external temperature detection device is electrically connected with an input end of the controller and is used for sending an external temperature detection value to the controller; the water curtain and the negative pressure fan can be opened or closed under the control of the controller. It should be noted that the off-shed temperature detecting device may automatically send the detected temperature value to the controller, or may send the detected temperature value to the controller in response to an inquiry command of the controller, which is not intended to limit the scope of the present invention.
It should be noted that the multiple negative pressure fans are arranged on the same side of the greenhouse. When the negative pressure fan is turned on, it is necessary to turn on the side ventilation devices opposite to the negative pressure fan, and turn off the top ventilation device and the remaining side ventilation devices. The side ventilation device on the side where the negative pressure fan is located is flexibly arranged, can be arranged or not arranged, and the protection scope of the invention is not limited by the arrangement.
As shown in fig. 7, after the controller controls the remaining at least one internal blower to be turned on, the method further includes:
judging whether the current temperature detection value in the shed is higher than a preset third temperature threshold value or not, and whether the temperature detection value outside the shed is higher than a fourth temperature threshold value or not, wherein the third temperature threshold value is higher than the second temperature threshold value, and the fourth temperature threshold value is lower than the third temperature threshold value, if so, the controller controls the top ventilation device and the side ventilation devices adjacent to the negative-pressure fans to be all closed, and controls one negative-pressure fan to be opened; if the current temperature detection value in the shed after one of the negative pressure fans is started has a rising trend, and the temperature detection value outside the shed is higher than the fourth temperature threshold value, the controller controls the water curtain and the remaining one of the negative pressure fans to be started; and if the current temperature detection value in the shed after the water curtain and the remaining one of the negative pressure fans are started has an ascending trend, and the temperature detection value outside the shed is higher than the fourth temperature threshold value, the controller controls the remaining at least one of the negative pressure fans to be started.
It should be noted that only when the temperature detection value outside the shed is higher than the fourth temperature threshold value and the temperature detection value in the shed is higher than the preset third temperature threshold value, one of the negative pressure fans is turned on; if the temperature detection value outside the shed is lower than the fourth temperature threshold value, the controller does not control the negative pressure fan and the water curtain to start no matter how high the temperature detection value in the shed is.
In an embodiment of the present invention, an intelligent temperature control system for a greenhouse is provided, the greenhouse further includes an external sunshade curtain and an illumination sensor electrically connected to an input end of the controller, the external sunshade curtain can be opened or closed under the control of the controller, the illumination sensor is configured to detect illumination intensity in the greenhouse in real time or at regular time, and actively or when the controller queries, send an illumination intensity detection value to the controller.
Under the condition that the weather information is judged to be free of rain and snow, the controller controls the outer sunshade curtain to be opened when any one of the following conditions occurs:
in the first case, as shown in fig. 8, if the current light intensity detection value is higher than the preset first light intensity threshold, the controller controls the outer sunshade to open.
In the second case (not shown), before determining whether the current temperature detection value in the greenhouse is higher than a preset third temperature threshold, it is determined whether the current temperature detection value in the greenhouse is higher than a preset fifth temperature threshold, where the fifth temperature threshold is lower than the third temperature threshold, and if so, the controller controls the outer sunshade to be opened.
When the outer sunshade curtain is opened, particularly when the outer sunshade curtain is just opened, the temperature in the greenhouse can be rapidly reduced, and the illumination intensity can be rapidly reduced, and the controller controls the outer sunshade curtain to be kept in an opened state within a preset first time threshold (for example: 1 hour) so as to prevent the opening and closing state of the outer sunshade curtain from being frequently switched in a short time.
After the first time threshold value is passed, whether the conditions for closing the outer sun-shading curtain are met is judged, namely: and if the current illumination intensity detection value is not greater than the preset second illumination intensity threshold value and the current temperature detection value in the shed is not greater than the preset sixth temperature threshold value, the controller controls the outer sunshade curtain to be closed. Particularly, when the outer sunshade curtain is just closed, the temperature in the greenhouse may be rapidly increased and the illumination intensity may be rapidly increased, at this time, the controller controls the outer sunshade curtain to maintain the closed state within a preset second time threshold (which may be the same as or different from the first time threshold), that is, within the preset second time threshold, even if the current greenhouse environment meets the condition of opening the outer sunshade curtain, the outer sunshade curtain is not opened, but the closed state of the outer sunshade curtain is maintained.
Similarly, within the preset first time threshold, even if the conditions for closing the outer sunshade (the current light intensity detection value is not greater than the second light intensity threshold and the current in-shed temperature detection value is not greater than the sixth temperature threshold) are met, the outer sunshade is not closed.
Wherein the second illumination intensity threshold (such as 5W lux) is lower than the first illumination intensity threshold (such as 10W lux), and the sixth temperature threshold (such as 33 ℃) is lower than the fifth temperature threshold (such as 34 ℃).
In one embodiment of the present invention, the greenhouse further comprises an inner sunshade, which can be opened or closed under the control of the controller.
Under the condition that the weather information is judged to be free of rain and snow, the controller controls the inner sunshade curtain to be opened when any one of the following conditions occurs:
in the first case, as shown in fig. 9, if the current illumination intensity detection value after the opening of the outer sunshade is higher than the first illumination intensity threshold, the controller controls the opening of the inner sunshade.
In the second case (not shown), after the controller controls all the negative pressure fans to be turned on, whether the current temperature detection value in the greenhouse is higher than a preset third temperature threshold value is judged, and if yes, the controller controls the inner sun shade to be turned on.
When the inner sunshade curtain is opened, particularly when the inner sunshade curtain is just opened, the temperature in the greenhouse can be rapidly reduced, and the illumination intensity can be rapidly reduced.
After the first time threshold value is passed, whether the conditions for closing the inner sunshade curtain are met is judged, namely: if the current illumination intensity detection value is not greater than a preset second illumination intensity threshold value (such as 5W lux) and the current temperature detection value in the shed is not greater than a preset second temperature threshold value (such as 38 ℃), the controller controls the inner sunshade curtain to be closed. Particularly, when the inner sunshade curtain is just closed, the temperature in the greenhouse may be rapidly increased and the illumination intensity may be rapidly increased, at this time, the controller controls the inner sunshade curtain to keep a closed state within a preset fourth time threshold (which may be the same as or different from the first time threshold), that is, within the preset fourth time threshold, even if the current greenhouse environment meets the condition of opening the inner sunshade curtain, the inner sunshade curtain is not opened, but the closed state of the inner sunshade curtain is kept.
Similarly, within the preset third time threshold, even if the conditions for closing the inner sunshade (the current light intensity detection value is not greater than the second light intensity threshold and the current in-shed temperature detection value is not greater than the third temperature threshold) are met, the inner sunshade is not closed.
It should be noted that, under the condition that the inner sunshade curtain and/or the outer sunshade curtain are/is opened, if the current weather information includes rain and snow, the inner sunshade curtain and the outer sunshade curtain need to be closed; and, under the situation that the said inner sunshade curtain and exterior sunshade curtain are closed, if there is rain or snow in the information of the present weather, even if the opening condition of the said inner sunshade curtain and exterior sunshade curtain has been reached, do not carry on the opening operation, but keep the closed state.
In addition, the opened state of the inner and outer shades means unfolding, and the closed state of the inner and outer shades means rolling, which is different from the opened and closed states of the greenhouse film. In addition, the opening modes of the inner sunshade curtain and the outer sunshade curtain are completely unfolded at one time and are unfolded to be completely unfolded for multiple times, and the details are not repeated here in the same way as the ventilation device.
In addition, the first temperature threshold, the second temperature threshold, the third temperature threshold, the fourth temperature threshold, the fifth temperature threshold, the sixth temperature threshold, the first illumination intensity threshold, the second illumination intensity threshold, the first time threshold, the second time threshold, the third time threshold, and the fourth time threshold are determined according to actual conditions, and the protection scope of the present invention is not limited thereto.
In one embodiment of the present invention, an intelligent temperature control system for a greenhouse is provided, the greenhouse further comprising a spray that can be turned on or off under the control of the controller. And if the current temperature detection value in the shed after all the negative pressure fans are started still has an ascending trend, the controller controls the spraying to be started.
In one embodiment of the invention, an intelligent temperature control system for a greenhouse is provided, the system further comprises a driving mechanism which can drive the top ventilation device, the side ventilation device, the water curtain, the negative pressure fan, the internal fan, the external sunshade curtain, the internal sunshade curtain and the spray to be closed or opened.
Taking the top ventilation device as a top film and the side ventilation device as a side film (and the side where the negative pressure fan is located is not provided with the side film) as an example for specific description:
as shown in fig. 10, the controller queries that the current weather information is free of rain and snow, and if the detected temperature detection value in the greenhouse exceeds 15 ℃, the controller controls the top film to be opened, wherein the top film can be opened to one fourth of the maximum opening of the top film, and if the temperature has a rising trend, the top film is sequentially opened to one half and three quarters of the maximum opening of the top film until the top film is completely opened. If the current temperature detection value in the greenhouse is kept unchanged, the state is kept, if the current temperature detection value in the greenhouse has an ascending trend, and the top film is completely opened, the side film is continuously opened, and the opening state of the side film has one fourth, one half, three quarters and a full opening state as the top film.
If the controller inquires that the current weather information contains rain and snow, the top film needs to be closed immediately, and meanwhile, the side films needing to be closed are judged according to the current wind direction and the wind speed information, if the current wind direction is south wind and the wind speed is more than 2m/s, the south side film needs to be closed (on the premise that the south side film is installed), so that the rain and snow are prevented from entering the greenhouse and being unfavorable for the growth of crops in the greenhouse. If the current wind direction is southeast wind and the wind speed is more than 2m/s, and the south side is provided with a negative pressure fan (i.e. the south side is not provided with a side film), the east side film is controlled to be closed.
After the top film and the side films are completely opened, if the detected temperature detection value in the greenhouse exceeds 32 ℃, starting 1 path of internal fans, and if the current temperature detection value in the greenhouse has an ascending trend, sequentially starting the 2 nd path of internal fans and the 3 rd path of internal fans until the internal fans are completely opened (the number of the internal fans is not limited). In the process of starting the internal fan, if the current temperature detection value in the shed is kept unchanged, other internal fans can not be started any more.
After the internal fan is completely started, if the detected temperature value in the greenhouse exceeds 34 ℃ for example, or if the current illumination intensity value exceeds 10 kallux at any stage (not limited to after the internal fan is completely started), the external sunshade curtain is started, and the starting mode of the external sunshade curtain is similar to that of a top film and has a state of one quarter, one half, three quarters and complete expansion. In the process, if the temperature detection value or the illumination intensity detection value in the current shed is kept unchanged, the current situation is kept; and if the current illumination intensity detection value is reduced to 5 kallux and the current temperature detection value in the shed is reduced to 33 ℃ for example, the outer sunshade curtain is closed. However, it should be noted that when the external sunshade is selected to be opened, the external sunshade should be kept opened for 1 hour, and in the 1 hour, even if the condition for closing the external sunshade is met, the external sunshade is not closed, but the external sunshade is kept in the opened state for 1 hour, and then whether the condition for closing the external sunshade is met is judged, and corresponding measures are taken.
After the outer sunshade screen is opened, if the temperature detection value in the greenhouse exceeds 38 ℃ and the temperature detection value outside the greenhouse is greater than 32 ℃, closing the top film and the side film adjacent to the negative-pressure fan in the 1 st path, opening the negative-pressure fan in the 1 st path, if the current temperature detection value in the greenhouse has an ascending trend and the temperature detection value outside the greenhouse is still greater than 32 ℃, opening the water curtain and the negative-pressure fan in the 2 nd path, and if the temperature detection value in the greenhouse after the water curtain and the negative-pressure fan in the 2 nd path still have an ascending trend and the temperature detection value outside the greenhouse is still greater than 32 ℃, opening the rest negative-pressure fans (without limiting the number of the internal fans). However, if the temperature detection value outside the greenhouse is lower than 32 ℃, the negative pressure fan and the water curtain are not started no matter how high the temperature detection value inside the greenhouse is, and the temperature inside the greenhouse is reduced by the top film, the side films, the internal fan and the low temperature outside the greenhouse.
And after all the negative pressure fans are started, if the temperature detection value in the greenhouse still exceeds 38 ℃, the inner sunshade curtain is started, and the starting mode of the inner sunshade curtain is similar to that of the outer sunshade curtain in a state of one quarter, one half, three quarters and complete expansion. Or, on the premise that the outer sunshade screen is opened, the current illumination intensity detection value is detected in real time at any stage (without limitation after the water curtain and the 2 nd path negative pressure fan are opened), and if the current illumination intensity detection value still exceeds 10 ten thousand lux, the inner sunshade screen also needs to be opened. When the current temperature detection value in the greenhouse after the inner sunshade screen is opened is lower than 38 ℃ and the current illumination intensity detection value is reduced to 5 kallux, the inner sunshade screen can be closed, but if the current temperature detection value in the greenhouse still has an ascending trend, the spraying is started again. The closing modes of the inner sunshade curtain and the outer sunshade curtain can be divided into a quarter of each closing mode until the inner sunshade curtain and the outer sunshade curtain are completely closed or directly and completely closed at one time, and the protection scope of the invention is not limited in this way. In addition, when the inner sunshade curtain is selected to be opened, the opening should be kept for 1 hour, and in the 1 hour, even if the condition of closing the inner sunshade curtain is met, the inner sunshade curtain is not closed, but the opening state is kept for 1 hour, then whether the condition of closing the inner sunshade curtain is met is judged, and corresponding measures are taken.
It should be noted that the parameters of 15 ℃, 32 ℃, 34 ℃, 38 ℃, 2m/s, 10 ten thousand lux, 5 ten thousand lux and 1 hour are all preset parameters, and can be set according to actual requirements, without limiting the protection scope of the present invention.
The intelligent temperature control system for the greenhouse provided by the invention combines meteorological information to control and regulate the temperature of the greenhouse, accords with the temperature control logic relationship of the greenhouse, is energy-saving and environment-friendly, automatically processes the temperature abnormity problem through various sensors (temperature sensors, illumination sensors and the like), and is more accurate and intelligent.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes that can be directly or indirectly applied to other related technical fields using the contents of the present specification and the accompanying drawings are included in the scope of the present invention.
Claims (12)
1. The utility model provides an intelligence temperature control system for big-arch shelter which characterized in that includes:
a controller, which is preset with a plurality of temperature thresholds;
the greenhouse comprises a top ventilation device, a plurality of side ventilation devices and a plurality of paths of internal fans, wherein the top ventilation device, the side ventilation devices and the paths of internal fans can be opened or closed under the control of the controller;
the temperature sensor is arranged in the greenhouse and used for detecting the temperature in the greenhouse in real time or at regular time, and the temperature sensor is electrically connected with the input end of the controller and used for sending a temperature detection value in the greenhouse to the controller;
the controller inquires current weather information, and if the current weather information is free of rain and snow and the temperature detection value in the shed is higher than a preset first temperature threshold value, the controller controls the top ventilation device and the side ventilation device to be started; judging whether the current temperature detection value in the shed is higher than a preset second temperature threshold value, wherein the first temperature threshold value is lower than the second temperature threshold value, and if so, controlling one path of internal fan to be started by the controller; and if the current temperature detection value in the shed after one of the internal fans is started still has an ascending trend, the controller controls the remaining internal fans to be started.
2. The intelligent temperature control system for greenhouses according to claim 1, wherein if the current weather information includes rain and snow, the controller determines whether the state of the top ventilation device is in an on state or an off state:
if the top ventilation device is in a closed state, the controller acquires a current temperature detection value in the shed and compares the current temperature detection value with the second temperature threshold, and if the current temperature detection value in the shed is higher than the second temperature threshold, the controller controls one path of internal fan to be opened;
if the top ventilation device is in an open state, the controller controls the top ventilation device to be closed, obtains a current temperature detection value in the shed and compares the current temperature detection value with the second temperature threshold, and if the current temperature detection value in the shed is higher than the second temperature threshold, the controller controls one path of internal fans to be opened.
3. The intelligent temperature control system for greenhouses according to claim 2, wherein if the current weather information includes rain and snow, the controller further determines whether the side ventilation device is in an open state or a closed state:
if the side ventilation device is in an open state, the current wind direction and wind speed information are judged, and if the wind speed reaches a preset wind speed threshold value, the controller controls the side ventilation device matched with the current wind direction information to be closed.
4. The intelligent temperature control system for greenhouses according to claim 3, further comprising, before comparing the current in-house temperature detection value with the second temperature threshold value:
if the top ventilation device is in a closed state, the controller acquires a current temperature detection value in the shed and compares the current temperature detection value with the first temperature threshold value, and if the current temperature detection value in the shed is higher than the first temperature threshold value, the controller controls the corresponding side ventilation device to be opened according to the current wind direction and wind speed information;
if the top ventilation device and the side ventilation devices are both in an open state, the controller controls the top ventilation device to be closed and simultaneously controls the corresponding side ventilation devices to be closed according to the current wind direction and wind speed information;
if the top ventilation device is in an open state and the side ventilation device is in a closed state, the controller controls the top ventilation device to be closed.
5. The intelligent temperature control system for greenhouses according to claim 1, wherein the controller controlling the top and side register to be turned on comprises the steps of:
the controller controls the top ventilation device and the side ventilation device to be respectively opened to the maximum opening degree at one time, or the controller controls the top ventilation device and the side ventilation device to be respectively opened gradually until the maximum opening degree is reached.
6. The intelligent temperature control system for greenhouses according to claim 1, wherein the controller controlling the top and side register to be turned on comprises the steps of:
if the temperature detection value in the shed is higher than the first temperature threshold value, the controller controls the top ventilation device and the side ventilation device to be synchronously opened to one fourth of the maximum opening degree of the top ventilation device and the side ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device and the side ventilation device to be synchronously opened to be one half of the maximum opening degree of the top ventilation device and the side ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device and the side ventilation device to be synchronously opened to three quarters of the maximum opening degree of the top ventilation device and the side ventilation device; and if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device and the side ventilation device to be synchronously opened to the respective maximum opening degrees.
7. The intelligent temperature control system for greenhouses according to claim 1, wherein the controller controlling the top and side register to be turned on comprises the steps of:
if the temperature detection value in the shed is higher than a preset first temperature threshold value, the controller controls the top ventilation device to be opened to one fourth of the maximum opening degree of the top ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device to be opened to be one half of the maximum opening degree of the top ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device to be opened to three-quarters of the maximum opening degree; if the current temperature detection value in the shed has an ascending trend, the controller controls the top ventilation device to be opened to the maximum opening degree;
if the current temperature detection value in the shed has an ascending trend, the controller controls the side ventilation device to be opened to one fourth of the maximum opening degree of the side ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the side ventilation device to be opened to be one half of the maximum opening degree of the side ventilation device; if the current temperature detection value in the shed has an ascending trend, the controller controls the side ventilation device to be opened to three-quarters of the maximum opening degree; and if the current temperature detection value in the shed has an ascending trend, the controller controls the side ventilation device to be opened to the maximum opening degree.
8. The intelligent temperature control system for a greenhouse of claim 1, wherein the greenhouse further comprises:
the outdoor temperature detection device is arranged outside the greenhouse and used for detecting the temperature outside the greenhouse in real time or at regular time, and the outdoor temperature detection device is electrically connected with the input end of the controller and used for sending an outdoor temperature detection value to the controller;
the water curtain and the multi-path negative pressure fan can be opened or closed under the control of the controller;
after the controller controls the opening of at least one path of the rest internal fans, the method further comprises the following steps:
judging whether the current temperature detection value in the shed is higher than a preset third temperature threshold value or not, and whether the temperature detection value outside the shed is higher than a fourth temperature threshold value or not, wherein the third temperature threshold value is higher than the second temperature threshold value, and the fourth temperature threshold value is lower than the third temperature threshold value, if so, the controller controls the top ventilation device and the side ventilation devices adjacent to the negative-pressure fans to be all closed, and controls one negative-pressure fan to be opened; if the current temperature detection value in the shed after one of the negative pressure fans is started has a rising trend, and the temperature detection value outside the shed is higher than the fourth temperature threshold value, the controller controls the water curtain and the remaining one of the negative pressure fans to be started; and if the current temperature detection value in the shed after the water curtain and the remaining one of the negative pressure fans are started has an ascending trend, and the temperature detection value outside the shed is higher than the fourth temperature threshold value, the controller controls the remaining at least one of the negative pressure fans to be started.
9. The intelligent temperature control system for the greenhouse of claim 8, wherein the greenhouse further comprises an external sunshade curtain and an illumination sensor electrically connected with the input end of the controller, the external sunshade curtain can be opened or closed under the control of the controller, the illumination sensor is used for detecting the illumination intensity in the greenhouse in real time or at regular time and sending the detected illumination intensity value to the controller; if the illumination intensity detection value is higher than a preset illumination intensity threshold value, the controller controls the outer sunshade curtain to be opened;
or,
before judging whether temperature detect value is higher than preset third temperature threshold in current canopy, still include: and judging whether the current temperature detection value in the greenhouse is higher than a preset fifth temperature threshold value, wherein the fifth temperature threshold value is lower than the third temperature threshold value, and if so, controlling the outer sun-shading curtain to be opened by the controller.
10. The intelligent temperature control system for a greenhouse of claim 9, wherein the greenhouse further comprises an internal shade that can be opened or closed under the control of the controller;
if the current illumination intensity detection value after the outer sunshade curtain is opened is higher than a preset illumination intensity threshold value, the controller controls the inner sunshade curtain to be opened;
or,
after all negative-pressure air blowers are started, the method further comprises the following steps: and judging whether the current temperature detection value in the greenhouse is higher than the third temperature threshold value, if so, controlling the opening of the inner sunshade curtain by the controller.
11. The intelligent temperature control system for greenhouses according to claim 1, wherein the top ventilation device is a top film or a top window, and the side ventilation device is a side film or a side window.
12. The intelligent temperature control system for a greenhouse of claim 8, wherein the greenhouse further comprises a spray that can be turned on or off under the control of the controller;
and if the current temperature detection value in the shed after all the negative pressure fans are started has an ascending trend, the controller controls the spraying to be started.
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| CN202110972024.3A CN113692894A (en) | 2021-08-24 | 2021-08-24 | Intelligent temperature control system for greenhouse |
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Application publication date: 20211126 |