CN113661869A - Greenhouse temperature control system - Google Patents

Greenhouse temperature control system Download PDF

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Publication number
CN113661869A
CN113661869A CN202110972032.8A CN202110972032A CN113661869A CN 113661869 A CN113661869 A CN 113661869A CN 202110972032 A CN202110972032 A CN 202110972032A CN 113661869 A CN113661869 A CN 113661869A
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China
Prior art keywords
ventilation device
detection value
temperature detection
greenhouse
controller
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CN202110972032.8A
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CN113661869B (en
Inventor
刘达新
周景江
王谋胜
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Danong Suzhou Agricultural Technology Co ltd
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Danong Suzhou Agricultural Technology Co ltd
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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
    • 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
    • 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
    • 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
    • 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 a greenhouse temperature control system, which comprises a controller, a greenhouse, a temperature sensor and an outdoor temperature detection device, wherein the greenhouse comprises a top ventilation device, a plurality of side ventilation devices, a water curtain and a plurality of paths of negative pressure fans; judging whether the current temperature detection value is higher than a preset second temperature threshold value or not, and whether the temperature detection value outside the shed is higher than a third temperature threshold value or not, if so, controlling one negative pressure fan to be started by the controller; and if the current temperature detection value in the shed after one of the negative pressure fans is started still has an ascending trend, the controller controls the water curtain and at least one of the rest negative pressure fans to be started. The technical scheme provided by the invention conforms to the temperature control logical relation of the greenhouse, and is energy-saving, environment-friendly, timely, efficient, accurate and intelligent by combining with meteorological temperature control.

Description

Greenhouse temperature control system
Technical Field
The invention relates to the technical field of greenhouses, in particular to a greenhouse temperature control system.
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 a greenhouse temperature control system, 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 a greenhouse temperature control system, 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, a water curtain and a plurality of paths of negative pressure fans, wherein the top ventilation device, the side ventilation devices, the negative pressure fans and the water curtain 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 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 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 or not, and whether the temperature detection value outside the shed is higher than a third temperature threshold value or not, wherein the first temperature threshold value is lower than the second temperature threshold value, and the third temperature threshold value is lower than the second temperature threshold value, if so, the controller controls the top ventilation device and the side ventilation device adjacent to the negative-pressure fan to be completely closed, and controls one negative-pressure fan to be opened; and if the current temperature detection value in the shed after one of the negative pressure fans is started still has an ascending trend, the controller controls the water curtain and at least one of the rest negative pressure 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 value, and if the current temperature detection value in the shed is higher than the second temperature threshold value and the temperature detection value outside the shed is higher than a third temperature threshold value, the controller controls one path of negative pressure fan and the side ventilation device opposite to the negative pressure fan to be started;
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 value, and if the current temperature detection value in the shed is higher than the second temperature threshold value and the temperature detection value outside the shed is higher than a third temperature threshold value, the controller controls one path of negative pressure fan and the side ventilation device opposite to the negative pressure fan to be opened.
Further preferably, 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 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.
Further, the controller controlling the top and side ventilation devices to be opened 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 greenhouse also comprises a plurality of paths of internal fans (namely barrel fans), and the internal fans can be turned on or off under the control of the controller;
before judging whether temperature detect value is higher than preset second temperature threshold in current canopy, still include: judging whether the current temperature detection value in the shed is higher than a preset fourth temperature threshold value, wherein the fourth 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 one of the internal fans is started has an ascending trend, the controller controls the remaining at least one of the internal 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 second 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 second temperature threshold value, and if so, controlling the outer sun-shading curtain to be opened by the controller.
Further preferably, the greenhouse further 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 a preset second temperature threshold value, if so, controlling the opening of the inner sunshade curtain by the controller.
Further, 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 a greenhouse temperature control system according to an embodiment of the present invention;
fig. 2 is a second flowchart of the greenhouse temperature control system according to the embodiment of the present invention;
fig. 3 is a third flowchart of the greenhouse temperature control system according to the embodiment of the present invention;
fig. 4 is a fourth operation flowchart of the greenhouse temperature control system according to the embodiment of the present invention;
fig. 5 is a fifth flowchart of the greenhouse temperature control system according to the embodiment of the present invention;
fig. 6 is a sixth flowchart of the greenhouse temperature control system according to the embodiment of the present invention;
fig. 7 is a seventh flowchart of a greenhouse temperature control system according to an embodiment of the present invention;
fig. 8 is an eighth flowchart of the greenhouse temperature control system according to the embodiment of the present invention;
fig. 9 is a ninth work flow chart of the greenhouse temperature control system according to the embodiment of the present invention;
fig. 10 is a tenth flowchart of the greenhouse temperature control system 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, a greenhouse temperature control system is provided and comprises a controller and a greenhouse. Wherein a plurality of temperature thresholds are preset in the controller; the greenhouse comprises a plurality of ventilation devices, a water curtain and a plurality of paths of negative pressure 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, the negative pressure fans and the water curtain can be opened or closed under the control of the controller; the temperature sensor is used for detecting the temperature in the greenhouse in real time or at regular time and is electrically connected with the input end of the controller so as to send a temperature detection value in the greenhouse to the controller; the outside temperature-detecting device that still is equipped with of big-arch shelter, the outside temperature-detecting device of canopy is used for real-time or regularly detecting the outside temperature of big-arch shelter, the outside temperature-detecting device of canopy with the input electricity of controller is connected to be used for with the outside temperature detection value of canopy send to the controller. It should be noted that, the temperature sensor and the off-shed temperature detecting device may both automatically send the detected temperature value to the controller, and may also send the detected temperature value to the controller in response to an inquiry command of the controller, which is not limited by 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.
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 or not and whether the temperature detection value outside the shed is higher than a third temperature threshold value or not, wherein the first temperature threshold value is lower than the second temperature threshold value, the third temperature threshold value is lower than the second temperature threshold value, if the current temperature detection value in the shed is higher than the preset second temperature threshold value and the temperature detection value outside the shed is higher than the third temperature threshold value, 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; and if the current temperature detection value in the shed after one of the negative pressure fans is started still has an ascending trend, the controller controls the water curtain and at least one of the rest negative pressure fans to be started. It should be noted that only when the temperature detection value outside the shed is higher than a third temperature threshold value and the temperature detection value in the shed is higher than a preset second temperature threshold value, one of the negative pressure fans is turned on; if the temperature detection value outside the shed is lower than the third 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.
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 value, and if the current temperature detection value in the shed is higher than the second temperature threshold value and the temperature detection value outside the shed is higher than a third temperature threshold value, the controller controls one path of negative pressure fan and the side ventilation device opposite to the negative pressure fan to be started;
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 value, and if the current temperature detection value in the shed is higher than the second temperature threshold value and the temperature detection value outside the shed is higher than a third temperature threshold value, the controller controls one path of negative pressure fan and the side ventilation device opposite to the negative pressure fan 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;
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 and the temperature detection value outside the shed is higher than a third temperature threshold, the controller controls one path of negative pressure fan and the side ventilation device opposite to the negative pressure 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.
It should be noted that, under the condition that the current weather information includes rain and snow, no matter the states of the top ventilation device and the side ventilation device are opened or closed, similarly, no rain and snow exist in the current weather information, as long as the temperature detection value outside the shed is lower than the third temperature threshold value, no matter how high the temperature detection value inside the shed is, the controller does not control the negative pressure fan and the water curtain to be started, but only under the condition that the temperature detection value outside the shed is higher than the third temperature threshold value and the temperature detection value inside the shed is higher than the preset second temperature threshold value, the negative pressure fan and the water curtain are started.
In one embodiment of the invention, the greenhouse temperature control system further comprises a plurality of internal fans, and the internal fans can be turned on or off under the control of the controller.
As shown in fig. 7, before determining whether the current temperature detection value in the greenhouse is higher than the preset second temperature threshold, the method further includes: judging whether the current temperature detection value in the shed is higher than a preset fourth temperature threshold value, wherein the fourth 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 one of the internal fans is started has an ascending trend, the controller controls the remaining at least one of the internal fans to be started.
In an embodiment of the invention, a greenhouse temperature control system is provided, the greenhouse further comprises an outer sunshade curtain and an illumination sensor electrically connected with an 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 actively or when the controller inquires.
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 the preset second 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 second 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 second 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 second 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 invention, a greenhouse temperature control system is provided, the greenhouse further comprising a spray, the spray being capable of being 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, the greenhouse temperature control 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 greenhouse temperature control system provided by the invention combines meteorological information to control and regulate the temperature of the greenhouse, accords with the greenhouse temperature control logical relation, is energy-saving and environment-friendly, automatically processes the problem of temperature abnormity 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 a big-arch shelter temperature control system 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, a water curtain and a plurality of paths of negative pressure fans, wherein the top ventilation device, the side ventilation devices, the negative pressure fans and the water curtain 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 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 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 or not, and whether the temperature detection value outside the shed is higher than a third temperature threshold value or not, wherein the first temperature threshold value is lower than the second temperature threshold value, and the third temperature threshold value is lower than the second temperature threshold value, if so, the controller controls the top ventilation device and the side ventilation device adjacent to the negative-pressure fan to be completely closed, and controls one negative-pressure fan to be opened; and if the current temperature detection value in the shed after one of the negative pressure fans is started still has an ascending trend, the controller controls the water curtain and at least one of the rest negative pressure fans to be started.
2. The greenhouse temperature control system of claim 1, wherein if the current weather information includes rain and snow, the controller determines whether 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 value, and if the current temperature detection value in the shed is higher than the second temperature threshold value and the temperature detection value outside the shed is higher than a third temperature threshold value, the controller controls one path of negative pressure fan and the side ventilation device opposite to the negative pressure fan to be started;
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 value, and if the current temperature detection value in the shed is higher than the second temperature threshold value and the temperature detection value outside the shed is higher than a third temperature threshold value, the controller controls one path of negative pressure fan and the side ventilation device opposite to the negative pressure fan to be opened.
3. The greenhouse temperature control system of claim 2, wherein the controller further determines whether the side ventilation devices are in an open state or a closed state if the current weather information includes rain and snow:
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 greenhouse temperature control system of claim 3, further comprising, before comparing the current in-greenhouse 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 greenhouse temperature control system of claim 1, wherein the controller controlling the top and side ventilation devices 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 greenhouse temperature control system of claim 1, wherein the controller controlling the top and side ventilation devices 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 greenhouse temperature control system of claim 1, wherein the controller controlling the top and side ventilation devices 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 greenhouse temperature control system of claim 1, wherein the greenhouse further comprises a plurality of internal fans, and the internal fans can be turned on or off under the control of the controller;
before judging whether temperature detect value is higher than preset second temperature threshold in current canopy, still include:
judging whether the current temperature detection value in the shed is higher than a preset fourth temperature threshold value, wherein the fourth 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 one of the internal fans is started has an ascending trend, the controller controls the remaining at least one of the internal fans to be started.
9. The greenhouse temperature control system of claim 1, wherein the greenhouse further comprises an external sunshade and an illumination sensor electrically connected with an input end of the controller, the external sunshade 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 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 second 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 second temperature threshold value, and if so, controlling the outer sun-shading curtain to be opened by the controller.
10. The greenhouse temperature control system 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 a preset second temperature threshold value, if so, controlling the opening of the inner sunshade curtain by the controller.
11. The greenhouse temperature control system of 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 greenhouse temperature control system of claim 1, wherein the greenhouse further comprises a spray, the spray being capable of being 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.
CN202110972032.8A 2021-08-24 2021-08-24 Greenhouse temperature control system Active CN113661869B (en)

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Publication number Priority date Publication date Assignee Title
JPH06195138A (en) * 1992-12-22 1994-07-15 Yamatake Honeywell Co Ltd Skylight controller for greenhouse
CN106482296A (en) * 2016-10-20 2017-03-08 北京云洋数据科技有限公司 Leak informaton adjusting means, booth and booth of booth leaks informaton control method
CN107347502A (en) * 2017-06-30 2017-11-17 深圳前海弘稼科技有限公司 The control method and control system of cool-down dehumidification, intelligent greenhouse
CN207604271U (en) * 2017-11-30 2018-07-13 丽水市农作物站 A kind of intelligence greenhouse system
CN108536199A (en) * 2018-03-13 2018-09-14 湟源嘉丰种植专业合作社 A kind of sunlight greenhouse curtain rolling air port automatic control system and method
CN111165221A (en) * 2020-01-02 2020-05-19 上海同魄科技有限公司 Greenhouse intelligent ventilation facility based on meteorological information and control method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06195138A (en) * 1992-12-22 1994-07-15 Yamatake Honeywell Co Ltd Skylight controller for greenhouse
CN106482296A (en) * 2016-10-20 2017-03-08 北京云洋数据科技有限公司 Leak informaton adjusting means, booth and booth of booth leaks informaton control method
CN107347502A (en) * 2017-06-30 2017-11-17 深圳前海弘稼科技有限公司 The control method and control system of cool-down dehumidification, intelligent greenhouse
CN207604271U (en) * 2017-11-30 2018-07-13 丽水市农作物站 A kind of intelligence greenhouse system
CN108536199A (en) * 2018-03-13 2018-09-14 湟源嘉丰种植专业合作社 A kind of sunlight greenhouse curtain rolling air port automatic control system and method
CN111165221A (en) * 2020-01-02 2020-05-19 上海同魄科技有限公司 Greenhouse intelligent ventilation facility based on meteorological information and control method thereof

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