CN109452044B - Local automatic cooling device based on underground cooling water pool and cooling method thereof - Google Patents
Local automatic cooling device based on underground cooling water pool and cooling method thereof Download PDFInfo
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- CN109452044B CN109452044B CN201811354256.7A CN201811354256A CN109452044B CN 109452044 B CN109452044 B CN 109452044B CN 201811354256 A CN201811354256 A CN 201811354256A CN 109452044 B CN109452044 B CN 109452044B
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- 238000005507 spraying Methods 0.000 claims abstract description 84
- 235000013311 vegetables Nutrition 0.000 claims abstract description 47
- 239000011796 hollow space material Substances 0.000 claims description 14
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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
- A01G9/14—Greenhouses
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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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- 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)
- Cultivation Of Plants (AREA)
Abstract
The invention discloses a local automatic cooling device based on an underground cooling water pool and a local automatic cooling method, wherein the local automatic cooling device comprises two first water return grooves which are parallel to each other, a physical space for accommodating a vegetable planting frame is formed in the space between the two first water return grooves, brackets are fixedly arranged on the outer walls of the two first water return grooves, and first water spraying pipes which are parallel to the first water return grooves are arranged on the brackets; the first water spraying pipe is connected with the outlet of the water pump, the inlet of the water pump is further connected with a cooling water pool buried with the ground, a first spraying hole group is arranged on the inner side of the pipe body of the first water spraying pipe, cold water sprayed out of the first spraying hole group is jetted into a first water returning groove opposite to the first spraying hole group through the upper space of a physical space, and the first water returning groove is communicated with the cooling water pool through a water returning pipe. The invention utilizes the low-temperature natural effect under the ground surface to exchange heat through water flow to form the local microclimate environment of the vegetables.
Description
Technical Field
The invention relates to the technical field of facility vegetable planting, in particular to a local automatic cooling device based on an underground cooling water pool and a cooling method thereof.
Background
South China belongs to subtropical climate areas, and the proportion of high-temperature weather is large all year round. A type of facility vegetables in the area are closed at the upper part by adopting a sunshade net, and the temperatures inside and outside the facility are almost consistent. And the temperature is one of important environmental factors influencing the healthy growth of vegetables. The invention aims to solve the technical problem of how to implement local temperature reduction in a facility with low energy, high efficiency and environmental protection without influencing other environmental factors beneficial to healthy growth of vegetables.
According to ' nationwide facility vegetable key area development planning (2015-2020) ' issued by Ministry of agriculture ', Guangdong province and areas such as the south-middle part of Fujian, Guangxi and the south-middle part of Yunnan belong to tropical and rainy areas in south China, the population of the areas is nearly 1.7 hundred million, and the population of cities is 0.7 hundred million. In most areas, vegetables can be produced in open field in winter for half a year, and the quantity of the vegetables is about 3200 ten thousand tons. Calculated as 1300 million tons of loss, 4500 million tons of vegetables are needed. If 20% of the water is produced at the local time, a plastic large and medium shed and a sunshade shed are needed, wherein the net area is 13.3 million hectares, and the occupied area is about 20 million hectares.
The greenhouse vegetables in the Guangdong, especially the greenhouse leaf vegetables, adopt an unclosed sunshade net on the greenhouse. In high-temperature weather, the temperature in the facility is reduced by the atomizing and spraying equipment erected below the sunshade net. Therefore, in order to avoid spraying water mist or ordinary rainwater directly falling onto the leafy vegetables during cooling, a waterproof shed is also erected below the spraying equipment and above the vegetables. In order to avoid the invasion of microorganisms, bacteria and the like in soil to vegetables and simultaneously facilitate transplanting, nursing and harvesting, the existing leaf facility vegetables basically adopt a soilless cultivation mode, the vegetables are planted on planting frames with the width of 1.2-1.5 meters and the height of the ground of about 1 meter, and manual operation channels with the length of about 0.5 meter are reserved between the planting frames.
The greenhouse is a mode of protective cultivation, and provides a more suitable microclimate environment for cultivating crops. In south China, the greenhouse is easy to have high temperature and high humidity in the same summer with rain and heat. At present, the greenhouse is cooled by evaporation or ventilation, the humidity in the greenhouse is increased by adopting the modes of evaporation and cooling such as spraying and spraying, the diseases and insect pests are easily caused due to overhigh humidity, and meanwhile, the cooling efficiency of evaporation and cooling is greatly reduced by the influence of the local air humidity in high-temperature and high-humidity areas. The air curtain machine blows outside air or air circulating in the greenhouse through a fan arranged on the side surface of the facility from a water curtain, and blows low-temperature air cooled by the water curtain into the facility to achieve the purpose of cooling in the facility; the ventilation method has poor temperature reduction effect in an extremely high temperature environment, generally only can adopt a whole house temperature reduction mode, and has high temperature reduction energy consumption; if the fan is a water curtain fan, the air humidity in the greenhouse can be increased. The sunshade net is a sunshade net which is arranged above the outside of the facility through a pull cover, prevents direct irradiation of sunlight and plays a role in cooling, and is generally only used as an auxiliary means for cooling.
The problems restrict the sustainable and healthy development of modern facility agriculture in China, and a new energy-saving greenhouse local cooling method which is not influenced by high-temperature and high-humidity climate environment is needed.
A greenhouse cold water cooling system (application number: 201720778114.8) comprises a plurality of guide rails, an elevating mechanism, a water pump and a refrigerating device, wherein the elevating mechanism is used for adjusting the height of the guide rails, the guide rails are arranged on a passageway between cultivation grooves in a greenhouse, the elevating mechanism is arranged below the guide rails, a hollow structure for introducing cold water is arranged in the guide rails, the guide rails are mutually communicated through water pipes, and the refrigerating device, the guide rails and the water pump are sequentially connected into a closed circulation loop. The guide rail is installed in cultivation groove both sides, lets in cold water in the guide rail, according to the different guide rail height of the altitude mixture control of the growth of plant, carries out local cooling to the plant. Carry out the heat exchange through the mode of heat radiation and thermal convection and plant surrounding environment, do not additionally increase the indoor air humidity of heating in the cooling, the lower guide rail of temperature can also reduce the indoor humidity of temperature through the form of comdenstion water simultaneously, reduces the emergence of plant diseases and insect pests. The scheme realizes the purpose of locally cooling the plants close to the guide rail, but the mode of exchanging heat with the surrounding environment of the plants through the physical surface of the pipeline has limited influence range, and the facility vegetables are usually placed on the planting frames with the width of 1.2-1.5 meters, and the farther the cultivation grooves are away from the guide rail, the poorer the cooling effect is, or even no effect is obtained; if guide rails are arranged on two sides of each cultivation groove, the cost of the cooling facility is greatly increased; meanwhile, the height of the guide rail physical cooling surface is affected, the height range of the plant with the effect is limited, or only one part of the plant can be cooled, and the cooling requirement of the whole plant of most facility vegetables cannot be met.
A local cooling system of a sunlight greenhouse and a cooling method (application number: 201320030588.6) based on the local cooling system comprise an air cooler, a pipeline system and a lifting system; the air cooler is arranged on the outer side of the rear wall of the greenhouse, and a pipeline system and a lifting system are arranged in the sunlight greenhouse; a main pipeline of the pipeline system is connected with an air outlet of the air cooler, and a plurality of horizontal branch pipelines of the pipeline system are connected with the main pipeline through vertical telescopic pipes; the lifting system drives the horizontal branch pipeline to lift in the vertical direction; the horizontal branch pipeline is provided with an air port; when normal ventilation can not maintain proper temperature in the greenhouse, determining parameters of an air cooler and each pipeline according to cooling requirements; and (4) starting the air cooler, and adjusting the height of the horizontal branch pipeline according to the height of the crops to keep the optimal cooling effect. According to the scheme, cold air is blown out through the horizontal branch pipe with the adjustable height at the upper part of the plant canopy, so that the local environment temperature at the upper part of the plant canopy is reduced. However, the plants of the facility vegetables grow fast, the planting period is short, the height of the horizontal branch pipe needs to be adjusted continuously in the period, and the operation is complex; the planting frame of the facility vegetables is usually 20-50 meters long, and in order to achieve the cooling effect, a large number of horizontal branch pipes are needed, the length is long, and the implementation cost is high; in a non-closed space, an air cooler is required to be opened all the time during cooling, and the energy consumption is high; the cold air cooling mode leads to the moisture of the plant to volatilize fast, has high requirements on timely supplement of air humidity and the moisture required by the plant, and leads to the increase of indirect cost.
A closed sunlight greenhouse cooling device (application number: 201510947921.3) comprises a spraying atomization system and a condensation heat dissipation system; the spraying and atomizing system comprises a water delivery pipe, a condensed water storage tank, a high-pressure water pump, a condensed water collecting pipe, a condensed water collector, a spraying pipe, an atomizing spray head, a greenhouse built-in diaphragm and a film pressing line; the condensation heat dissipation system comprises a gravity heat pipe heat exchanger, a cold water tank, a water pump, a hot water storage tank, an axial flow fan, an exhaust pipe and a return air pipe. The device is characterized in that an atomizing nozzle is arranged between two connecting points of a spray pipe and a shed frame every 2-3 m, a V-shaped diaphragm is arranged at a position 0.8-1.2 m below the atomizing nozzle, and water mist of the atomizing nozzle is collected through the diaphragm. The greenhouse is divided into an upper high-temperature area and a lower crop growth area by the diaphragm. But for the unsealed facility vegetables, the area at the lower part of the diaphragm is not obvious in cooling effect because of being communicated with the outside; meanwhile, condensed water is generated on the bottom surface of the diaphragm, and part of the condensed water naturally drops on crops in the facility to cause crop diseases.
The greenhouse cooling device and the application method (application number: 201410325550.0), the greenhouse heating and cooling system (application number: 201310186420.9), the semi-closed greenhouse (application number: 201721885593.X) and the like, and the aim of cooling the greenhouse is fulfilled by conveying cooled cold air into the greenhouse. But is not suitable for non-closed facility vegetables, and the cold air cooling mode leads to the moisture of plant to volatilize fast simultaneously, and the requirement to the timely replenishment of air humidity, the required moisture of plant is high, has led to the increase of indirect cost. The ventilation method has poor temperature reduction effect in an extremely high temperature environment, generally only adopts a whole-house temperature reduction mode, and has high temperature reduction energy consumption.
The prior art has the following disadvantages:
1. the cooling mode of the sunshade net is as follows: the cooling function is realized by preventing or reducing the direct irradiation of sunlight. Has certain cooling effect, but influences the illumination intensity in the facility, and further influences the photosynthesis of the vegetables. In high-temperature weather, the sunshade net only reduces the heat generated by direct sunlight, and the temperature difference between the inner space and the outer space is not large for the physical space of open facility vegetables.
2. The water mist cooling mode is as follows: water or underground water passes through the atomizing and spraying device to form water mist in the facility, thereby achieving the purpose of cooling. But the air humidity in the facility is increased, and the high humidity is one of the main factors causing vegetable diseases and insect pests; meanwhile, if the water used for water mist is not recycled, water resource waste is caused.
3. Cooling mode of the air curtain machine: the low-temperature and low-humidity air passing through the water flow flows in the facility to achieve the effect of cooling, but the air humidity in the facility is increased; and is not suitable for the conditions that vegetable plants in the facility or the planting height is large and is not favorable for air flow. The ventilation method has poor temperature reduction effect in an extremely high temperature environment, generally only adopts a whole-house temperature reduction mode, and has high temperature reduction energy consumption. The effect on the physical space of the open facility vegetables is not obvious.
4. A drying and cold air cooling mode: the water of the plants is volatilized quickly, the requirements on air humidity and timely supplement of the water needed by the plants are high, and indirect cost is increased. The ventilation method has poor temperature reduction effect in an extremely high temperature environment, generally only adopts a whole-house temperature reduction mode, and has high temperature reduction energy consumption.
Disclosure of Invention
In view of at least one defect of the prior art, the invention aims to provide a local automatic cooling device based on an underground cooling water pool and a cooling method thereof, which utilize the low-temperature natural effect under the ground surface to carry out heat exchange through water flow so as to form a local microclimate environment of vegetables; the first cold water curtain for cooling absorbs direct sunlight heat. The first cold water curtain absorbs heat of the physical space and forms sinking cold air flow to cool the physical space; when the method is implemented, the illuminance is not influenced, and meanwhile, the cooling water is recycled, so that the method is energy-saving and environment-friendly.
In order to achieve the purpose, the invention adopts the following technical scheme; a local automatic cooling device based on an underground cooling water pool is characterized by comprising two first water return grooves which are parallel to each other, wherein a physical space for accommodating a vegetable planting frame is formed in a space between the two first water return grooves or a space below the two first water return grooves, supports are fixedly arranged on the outer walls of the two first water return grooves, and first water spraying pipes which are parallel to the first water return grooves are arranged on the supports; first trickle pipe links to each other with the export of water pump, the entry linkage of water pump has the cooling pond of burying, the pipe shaft inboard of first trickle pipe is provided with the first punch combination that sprays, the first punch combination that sprays is towards first return water groove opposite, jet into in the first return water groove opposite from the first cold water that sprays punch combination spun through the sky of physical space, first return water groove passes through return water pipe intercommunication cooling pond, the cold water that jets out from the first punch combination that sprays forms the heat that first cold water curtain absorbed physical space top sunshine and forms the cold air current that sinks and cool down for the physical space cooling.
The effect that above-mentioned structure set up does, through the physical space that forms between two first return water grooves and hold vegetable planting frame, places vegetable planting frame in physical space, and the water pump leads to pipe and links to each other with first trickle pipe, and cold water in the pond of cooling through the water pump extraction jets out through first spraying punch combination and flows into opposite first return water groove, and the cold water that jets out from first spraying punch combination forms first cold water curtain and plays the effect that absorbs sunshine and penetrate heat directly. The implementation does not affect the illumination intensity. The cooling water pool is arranged in an underground mode, heat exchange is carried out through water flow by utilizing a low-temperature natural effect below the ground surface, heat is brought into the ground, and compared with a cold air cooling mode, energy consumption is saved.
The first cold water curtains are cold water, and the cold water can absorb heat of a physical space through evaporation and bring the heat into the cooling water pool for cooling. The first cold water curtain cools air above the physical space, and the cooled air sinks to cool vegetables on the vegetable planting frame.
Compared with spraying by a sprayer, the air humidity in the facility is not increased, and compared with a wind curtain machine, the air humidity is not increased due to no blowing to a physical space, and meanwhile, water for cooling is recycled, so that the energy is saved and the environment is protected.
The water pump can be controlled by a computer in an automatic cooling method, can be manually switched on and off, and can be connected with the first water spraying pipe through a water pipe through a manual valve, the flow and the speed of cold water are adjusted through the manual valve, but the cold water ejected from the first water spraying pipe can flow into the opposite first water return tank under the condition of the lowest rotating speed V0.
Still parallel arrangement has the second return water groove between two first return water grooves, the second return water groove also communicates the cooling pond through the wet return, middle part at the second return water groove is provided with the support frame, the support frame both sides are provided with the second spray pipe parallel with the second return water groove, the second spray pipe links to each other with the export of water pump, the outside of second spray pipe is provided with the second and sprays the punch combination, the second sprays the first return water groove towards the opposite, spray the overhead of punch combination spun cold water from the second and inject into opposite first return water groove, spray the cold water that the punch combination jetted out from the second and form the heat that the second cold water curtain absorbed the sunshine above the physical space and form the cold air and sink and flow and give the physical space cooling.
The effect that above-mentioned structure set up does: the second water return grooves are arranged between the two first water return grooves in parallel, the support frame is arranged in the middle of each second water return groove, the second water spraying pipes are arranged on two sides of the support frame, and cold water sprayed out of the second spraying hole groups of the second water spraying pipes forms a second cold water curtain to absorb heat of sunlight above the physical space and form sinking cold air flow to cool the physical space.
This scheme can further promote the cooling effect in physical space through the cold water curtain of second, and the water pump can link to each other through manual valve or solenoid valve water pipe and second spray pipe, and the flow or the velocity of flow of manual valve or solenoid valve should be able to guarantee that the cold water that jets out from the second spray hole group can flow into in the first return tank of opposite face.
The second return water tank divides the physical space into two parts, and the two parts can be used for placing the vegetable planting frame. The second return water tank can also recover the water flowing down along the edge of the second spraying hole group to the cooling water tank.
At least two first water spraying pipes are arranged on the bracket; the first water spraying pipes are parallel to each other and are arranged in a high-low mode, and the orifices of the first spraying hole groups of all the first water spraying pipes are arranged in a staggered mode along the length direction.
The effect that above-mentioned structure set up does: set up a plurality of cold water curtains, improve the cooling effect in physical space. The first spraying hole groups of the two first spraying pipes are arranged in a staggered mode, and a better cooling effect can be achieved.
The middle part of the first water return tank is horizontally provided with a baffle plate, a water permeable hole array penetrating through the baffle plate is arranged on the baffle plate, a hollow space is formed by the baffle plate and the bottom surface of the first water return tank, cold water flows into the hollow space through the water permeable hole array, and the hollow space is communicated with a cooling water pool through a water return pipe; and a water absorption filter layer is arranged on the baffle.
The effect that above-mentioned structure set up does, and the filter layer that absorbs water is used for the impulsive force of the water droplet or the rivers of slowly-releasing and absorption drippage at first basin of returning, prevents to splash on the vegetable planting frame in physical space, also holds concurrently or plays filterable effect simultaneously. Cold water passes through the water absorption filter layer, enters the hollow space through the water permeable hole array, and then flows back to the cooling water pool through the hollow space and the return pipe.
The water absorption filter layer is made of sponge materials which are soft, permeable and water-absorbing.
The water pump is provided with a stepping motor, the water pump is connected with a first water spraying pipe through a main electromagnetic valve, the water pump is connected with a second water spraying pipe through a branch electromagnetic valve, the physical space is provided with a temperature sensor, the temperature sensor is connected with a microcontroller through an analog-to-digital converter, the microcontroller is connected with an upper computer, the microcontroller is connected with a stepping motor driving module, the stepping motor driving module drives a stepping motor to rotate, and the upper computer controls the stepping motor to work through the microcontroller;
the upper computer controls the switch of the main electromagnetic valve and the branch electromagnetic valve through the microcontroller.
Through foretell structure, the host computer obtains the temperature in physical space according to temperature sensor's data to through microcontroller control step motor rotation, when temperature sensor's data is greater than the temperature threshold value that the host computer set for, microcontroller control step motor rotates, supplies water through the water pump, when temperature sensor's data is less than the temperature threshold value that sets for, control step motor slows down, and control water pump reduces and supplies water, but minimum speed can not be less than V0At the lowest speed V0In this case, it is necessary to ensure that the cold water discharged from the first water spray pipe can flow into the first water return tank on the opposite side.
The water pump is connected with the second water spraying pipe through a hose after passing through the branch electromagnetic valve.
When first cold water curtain still can not accomplish the cooling demand, can open branch solenoid valve, the second cold water curtain that forms through the second trickle improves the cooling effect.
The upper computer can be set to a manual mode, and in the manual mode, a user can set the switch and the rotating speed of the stepping motor through a keyboard and can also control the switch of the main electromagnetic valve.
In the manual mode, the switches of the partial electromagnetic valves can be manually set on the upper computer through a keyboard.
And a baffle is fixedly connected between the end parts of the two first water return grooves on the same side.
The baffle is used for improving the cooling effect of the first cold water curtain on cooling the physical space.
The effect that above-mentioned structure set up does: the two open side surfaces of the physical space are blocked by the baffle plates, so that the heat of the physical space is prevented from escaping from the open side surfaces of the two sides, and the cooling effect of the physical space is improved.
A cooling method of a local automatic cooling device based on an underground cooling water pool is characterized by comprising the following steps;
step A: the upper computer obtains the real-time temperature T of the physical space through the temperature sensor0；
And B: the upper computer judges if the real-time temperature T is0>T1，T1C, controlling the main electromagnetic valve to be opened by the upper computer for the temperature threshold value, and entering the step C; otherwise, returning to the step A;
in this step, if the real-time temperature T is0>T1The upper computer controls the main electromagnetic valve to open, pumps water through the water pump to cool, if T0≤T1Returning to the step A to continue waiting;
and C: the upper computer controls the stepping motor to operate at the maximum speed Vmax through the microcontroller, and the water pump pumps cold water in the cooling water tank and ejects the cold water through a first spraying hole group arranged on a first water spraying pipe to form a first cold water curtain;
the first cold water curtain passes through the upper part of the physical space to absorb the heat of direct sunlight; the first cold water curtain absorbs heat of the physical space and forms sinking cold air flow to cool the physical space;
in the step, the upper computer controls the stepping motor to operate at the maximum speed Vmax through the microcontroller to form a first cold water curtain to cool the physical space;
step D: the upper computer delay time t;
step E: the upper computer detects the real-time temperature T of the physical space through the temperature sensor0；
Step F: if the real-time temperature T0>T1The upper computer controls the opening of the branch electromagnetic valve and controls the water pump to pump cold water in the cooling water tank through the second water spraying pipeThe second spraying hole group is ejected to form a second cold water curtain;
the second cold water curtain absorbs the heat of the physical space and forms sinking cold air flow to cool the physical space;
in this step, if the real-time temperature T is0Is still greater than T1The upper computer controls the opening of the branch electromagnetic valve, and controls the water pump to pump cold water in the cooling water pool and eject the cold water through a second spraying hole group arranged on a second water spraying pipe to form a second cold water curtain; cooling the physical space through a second cold water curtain;
entering the step G;
if the real-time temperature T0≤T1Entering step H;
step G: the upper computer delay time t; controlling the closing of the branch electromagnetic valves; entering the step D;
in the step, the upper computer delays for time t; after the second cold water curtain is cooled for a period of time, the closing of the power distribution electromagnetic valve is controlled; the step D is returned again to detect the real-time temperature T of the physical space0；
Step H: the upper computer judges if the real-time temperature T is0＝T1Returning to the step D;
in this step, the upper computer judges if the real-time temperature T is present0＝T1Returning to the step D, and continuing to delay and wait;
otherwise, entering step I;
step I: the upper computer judges if T0<T1The upper computer controls the stepping motor to reduce the rotating speed delta V through the microcontroller;
in this step, if T0<T1When the temperature of the physical space is too low, the rotation speed delta V is reduced by controlling the stepping motor through the microcontroller, and the cooling effect is reduced; the delta V is preset in an upper computer;
step J: the upper computer calculates whether the rotating speed of the stepping motor is less than or equal to V0If so, controlling the stepping motor to stop rotating, controlling the main electromagnetic valve to close, and returning to the step A; otherwise, entering a step K;
in this step, the upper level calculationCalculating whether the real-time rotating speed minus the rotating speed delta V of the stepping motor is less than or equal to V0，V0The rotating speed of the minimum stepping motor is the rotating speed at which the cold water ejected from the first water spraying pipe can flow into the opposite first water return tank; at the lowest speed V0In this case, it is necessary to ensure that the cold water discharged from the first water spray pipe can flow into the first water return tank on the opposite side. If yes, controlling the stepping motor to stop rotating, controlling the main electromagnetic valve to close, and returning to the step A for delay waiting;
the first water return tank has a certain width, so that cold water ejected from the first water spraying pipe can flow into the opposite first water return tank.
Step K: the upper computer delays the time t,
step L: the upper computer obtains the real-time temperature T of the physical space0，
In this step, the upper computer again acquires the real-time temperature T of the physical space0，
Step M: the upper computer judges if T0＝T1Returning to the step K; continuing delaying for waiting;
if T is0<T1Returning to the step I; controlling the stepping motor to further reduce the rotating speed delta V and further reduce the cooling effect;
if T is0>T1And returning to the step C. And if the temperature is possibly raised due to solar irradiation at noon, returning to the step C to perform adjustment again.
By the method, the upper computer can intelligently control the temperature of the physical space and stabilize the temperature of the physical space at the temperature setting threshold T1. When the outside temperature is reduced to the set threshold value T1In the following, the stepping motor is turned off.
The invention provides a local automatic cooling device based on an underground cooling water pool and a cooling method thereof, which utilize the low-temperature natural effect under the ground surface to carry out heat exchange through water flow to form a local microclimate environment of vegetables; the first cold water curtain for cooling absorbs direct sunlight heat. The first cold water curtain absorbs heat of the physical space and forms sinking cold air flow to cool the physical space; when the method is implemented, the illuminance is not influenced, and meanwhile, the cooling water is recycled, so that the method is energy-saving and environment-friendly.
Drawings
FIG. 1 is a block diagram of a first embodiment of the present invention;
FIG. 2 is a block diagram of a second embodiment of the present invention;
FIG. 3 is a view taken along line A of FIG. 2;
FIG. 4 is a circuit block diagram of the present invention;
FIG. 5 is a circuit block diagram of the present invention;
FIG. 6 is a flow chart of a method of the present invention;
FIG. 7 is a schematic view of a first chilled water curtain and a second chilled water curtain;
fig. 8 is a schematic view of a third embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
As shown in fig. 1-8, a local automatic cooling device based on an underground cooling water pool comprises two strip-shaped first water return tanks 1 parallel to each other, in two embodiments of fig. 1-2, two first water return tanks 1 and a second water return tank 5 are directly placed on the ground, a physical space 2 for accommodating a vegetable planting rack is formed in a space between the two first water return tanks 1, a support 11 is fixedly arranged on the outer wall of each of the two first water return tanks 1, and a first water spraying pipe 12 parallel to the first water return tank 1 is mounted on the support 11; first spray pipe 12 links to each other with the export of water pump 3, the entry of water pump 3 still is connected with the cooling pond 4 that buries with ground, the pipe shaft inboard of first spray pipe 12 is provided with first spray hole group 12a, first spray hole group 12a sets up along the oblique top, inject into opposite first return flume 1 from first spray hole group 12a spun cold water through the sky of physical space 2 in, first return flume 1 passes through return flume 13 intercommunication cooling pond 4, the cold water that jets out from first spray hole group 12a forms the heat that first cold water curtain absorbed 2 top sunshine and forms the cold air current that sinks and cool for physical space 2 cooling.
The effect that above-mentioned structure set up does, through forming the physical space 2 that holds the vegetable planting frame between two first return water tank 1, place the vegetable planting frame at physical space 2, water pump 3 passes through the water pipe and links to each other with first trickle pipe 12, the cold water in the pond 4 of cooling is extracted through water pump 3 jets out through first shower hole group 12a and flows into in the opposite first return water tank 1, the cold water that jets out from first shower hole group 12a forms first cold water curtain and plays the effect of absorbing the direct heat of sunshine. The implementation does not affect the illumination intensity. The cooling water pool 4 is arranged in an underground mode, is arranged below the ground surface in a sealing mode, is optimally 5-10 meters, utilizes the low-temperature natural effect below the ground surface, carries out heat exchange through water flow, brings heat into the ground, and saves energy compared with a cold air cooling mode.
The upper part of the cooling water pool 4 is provided with one or more water injection ports 41 which are used for being physically connected with tap water or other water sources and used for injecting or supplementing water required by the cooling of the cooling water pool 4.
The first cold water curtains are cold water, and the cold water can absorb heat of the physical space 2 through evaporation and bring the heat into the cooling water pool 4 for cooling. The first cold water curtain cools the air above the physical space 2, and the cooled air sinks to cool the vegetables on the vegetable planting frame.
Compared with spraying by a sprayer, the air humidity in the facility is not increased, and compared with a wind curtain machine, the air humidity is not increased because air is not blown to the physical space 2, and meanwhile, water for cooling is recycled, so that the energy is saved and the environment is protected.
The water pump 3 can be controlled by a computer in an automatic cooling method, can be manually switched on and off, can be connected with the first water spraying pipe 12 through a water pipe through a manual valve, adjusts the cold water flow and the cold water speed through the manual valve, and ensures the lowest rotating speed V0In the case of (3), the cold water injected from the first water spray pipe 12 can flow into the first water return tank 1 on the opposite side.
The second water return groove 5 is arranged between the two first water return grooves 1 in parallel, the second water return groove 5 is also communicated with the cooling water pool 4 through the water return pipe 13, a support frame 51 is arranged in the middle of the second water return groove 5, second water spraying pipes 52 parallel to the second water return groove 5 are arranged on two sides of the support frame 51, the second water spraying pipes 52 are connected with an outlet of the water pump 3, a second spraying hole group 52a is arranged on the outer side of the second water spraying pipes 52, the second spraying hole group 52a is arranged along the obliquely upward direction, cold water sprayed out of the second spraying hole group 52a is injected into the opposite first water return groove 1 through the upper space of the physical space 2, and the cold water sprayed out of the second spraying hole group 52a forms a second cold water curtain to absorb heat of sunlight above the physical space 2 and form sinking cold air flow to cool the physical space 2.
The effect that above-mentioned structure set up does: through still parallel arrangement have second return water tank 5 between two first return water tanks 1, be provided with support frame 51 in the middle part of second return water tank 5, support frame 51 both sides set up second trickle 52, and the cold water that jets out from second trickle 52a of second trickle forms the heat that the second cold water curtain absorbed the sunshine above physical space 2 and forms the cold air current that sinks and cool down for physical space 2.
This scheme can further promote the cooling effect of physical space 2 through the cold water curtain of second, and water pump 3 can link to each other through manual valve or solenoid valve through water pipe and second spray pipe 52, and the flow or the velocity of flow of manual valve or solenoid valve should be able to guarantee that the cold water that jets out from second spray hole group 52a can flow into in the first return tank 1 of opposite side.
The second water returning tank 5 divides the physical space 2 in fig. 1 and 2 into two parts, and both the two parts can be placed with vegetable planting racks. The second water return tank 5 can also recover the water flowing down along the edge of the second spraying hole group 52a to the cooling water tank 4.
At least two first water spraying pipes 12 are arranged on the bracket 11; the first shower pipes 12 are arranged in parallel and at high and low positions, and the orifices of the first shower hole group 12a of all the first shower pipes 12 are arranged in a staggered manner in the longitudinal direction.
Such an embodiment is not shown in the figures.
The effect that above-mentioned structure set up does: set up a plurality of cold water curtains, improve physical space 2's cooling effect. The first spraying hole groups 12a of the two first spraying pipes 12 are arranged in a staggered manner, so that a better cooling effect can be achieved.
A baffle plate 14 is horizontally arranged in the middle of the first water return tank 1, a water permeable hole array 14a penetrating through the baffle plate 14 is arranged on the baffle plate 14, a hollow space is formed by the baffle plate 14 and the bottom surface of the first water return tank 1, cold water flows into the hollow space through the water permeable hole array 14a, and the hollow space is communicated with the cooling water tank 4 through a water return pipe 13; a water absorption filter layer is arranged on the baffle plate 14. The hollow space and the water absorption filter layer are not shown in the figure, wherein the baffle plate 14 is arranged in the middle of the inner cavity of the first water return tank 1 through a support leg or a welding way.
The effect that above-mentioned structure set up does, and the filter layer that absorbs water is used for the impulsive force of the water droplet or the rivers of slowly-releasing and absorption drippage at first return water tank 1, prevents to splash on the vegetable planting frame of physical space 2, also holds concurrently or plays filterable effect simultaneously. The cold water passes through the water absorption filter layer, enters the hollow space through the permeable hole array 14a, and then flows back to the cooling water pool 4 through the hollow space through the return pipe 13.
The water absorption filter layer is made of sponge materials. The sponge material is soft, porous and water-absorbing.
A support leg is arranged below the baffle plate 14 and supported on the bottom surface of the first water return tank 1 through the support leg;
the water pump 3 is provided with a stepping motor 31, the water pump 3 is connected with the first water spraying pipe 12 through a main electromagnetic valve 32, the water pump 3 is connected with the second water spraying pipe 52 through a branch electromagnetic valve 33, the physical space 2 is provided with a temperature sensor 21, the temperature sensor 21 is connected with a microcontroller 23 through an analog-to-digital converter 22, the microcontroller 23 is connected with an upper computer 25, the microcontroller 23 is connected with a stepping motor driving module 24, the stepping motor driving module 24 drives the stepping motor 31 to rotate, and the upper computer 25 controls the stepping motor 31 to work through the microcontroller 23;
the upper computer 25 controls the switch of the main electromagnetic valve 32 and the branch electromagnetic valve 33 through the microcontroller 23.
Through the structure, the upper computer 25 obtains the temperature of the physical space 2 according to the data of the temperature sensor 21, and controls the stepping motor 31 to rotate through the microcontroller 23, when the data of the temperature sensor 21 is larger than the temperature threshold value set by the upper computer 25, the microcontroller 23 controls the stepping motor 31 to rotate, water is supplied through the water pump 3, when the data of the temperature sensor 21 is smaller than the set temperature threshold value, the stepping motor 31 is controlled to decelerate, the water pump 3 is controlled to reduce the water supply, but the lowest speed of the stepping motor 31 is the lowest speedDegree not less than V0At the lowest speed V0In this case, it is ensured that the cold water discharged from the first water spraying pipe 12 can flow into the first water returning tank 1 facing thereto.
The water pump 3 is connected with the second water spraying pipe 52 through a hose after passing through the branch electromagnetic valve 33.
When the first cold water curtain can not finish the cooling requirement, the branch electromagnetic valve 33 can be opened, and the second cold water curtain formed by the second water spraying pipe 52 improves the cooling effect.
The microcontroller 23 is either a single chip microcomputer or a PLC controller;
the PLC224 controller is adopted in the embodiment, the PLC224 controller is connected with the host computer 25 through an industrial personal computer interface, the temperature sensor 21 adopts an AD590 temperature sensor, the analog-to-digital converter 22 adopts an EM231 analog-to-digital conversion module, the stepping motor driving module 24 adopts an SH20822M stepping motor module, and the stepping motor 31 adopts a 130BYG2503 stepping motor. The temperature sensor 21 is connected to the analog-to-digital converter 22 via an amplifier AM 1.
The upper computer 25 can also be set to a manual mode, in which a user can set the switch and the rotation speed of the stepping motor 31 through a keyboard and can also control the switch of the main electromagnetic valve 32.
In the manual mode, the switches of the partial solenoid valves 33 can be set manually on the upper computer 25 by means of a keyboard.
A baffle 26 is fixedly connected between the end parts of the two first water return grooves 1 on the same side.
The baffle 26 is used to increase the cooling effect of the first cold water curtain cooling the physical space 2.
A cooling method of a local automatic cooling device based on an underground cooling water pool is characterized by comprising the following steps;
step A: the upper computer 25 obtains the real-time temperature T of the physical space 2 through the temperature sensor 210；
And B: the upper computer 25 judges if the real-time temperature T is0>T1，T1For the temperature threshold value, the upper computer 25 controls the main electromagnetic valve 32 to be opened, and the step C is carried out; otherwise return to stepA, a step A;
in this step, if the real-time temperature T is0>T1The upper computer 25 controls the main electromagnetic valve 32 to open and pumps water through the water pump 3 to cool if T is detected0≤T1Returning to the step A to continue waiting;
and C: the upper computer 25 controls the stepping motor 31 to operate at the maximum speed Vmax through the microcontroller 23, and the water pump 3 pumps cold water in the cooling water pool 4 and emits the cold water through a first spraying hole group 12a arranged on the first water spraying pipe 12 to form a first cold water curtain; vmax is the maximum rotational speed of the stepper motor 31;
the first cold water curtain passes through the upper part of the physical space 2 to absorb the heat of direct sunlight; the first cold water curtain absorbs the heat of the physical space 2 and forms sinking cold air flow to cool the physical space 2;
in this step, the upper computer 25 controls the stepping motor 31 to operate at the maximum speed Vmax through the microcontroller 23, so as to form a first cold water curtain for cooling the physical space 2;
step D: the host computer 25 delays the time t; the delay time t is preset by the upper computer 25;
step E: the upper computer 25 detects the real-time temperature T of the physical space 2 through the temperature sensor 210；
Step F: if the real-time temperature T0>T1The upper computer 25 controls the opening of the branch electromagnetic valve 33, controls the water pump 3 to pump cold water in the cooling water pool 4 and eject the cold water through a second spraying hole group 52a arranged on a second water spraying pipe 52 to form a second cold water curtain;
the second cold water curtain absorbs the heat of the physical space 2 and forms sinking cold air flow to cool the physical space 2;
in this step, if the real-time temperature T is0Is still greater than T1The upper computer 25 controls the opening of the branch electromagnetic valve 33, controls the water pump 3 to pump cold water in the cooling water pool 4 and eject the cold water through a second spraying hole group 52a arranged on a second water spraying pipe 52 to form a second cold water curtain; cooling the physical space 2 through a second cold water curtain;
entering the step G;
if the real-time temperature T0≤T1Entering step H;
step G: the host computer 25 delays the time t; controlling the sub-electromagnetic valves 33 to close; entering the step D;
in this step, the upper computer 25 delays for a time t; after the second cold water curtain is cooled for a period of time, the sub-electromagnetic valve 33 is controlled to be closed; the real-time temperature T of the physical space 2 is detected by returning to the step D again0；
Step H: the upper computer 25 judges if the real-time temperature T is0＝T1Returning to the step D;
in this step, the upper computer 25 judges if the real-time temperature T is present0＝T1Returning to the step D, and continuing to delay and wait;
otherwise, entering step I;
step I: the upper computer 25 judges if T0<T1The upper computer 25 controls the stepping motor 31 to reduce the rotating speed delta V through the microcontroller 23;
in this step, if T0<T1When the temperature of the physical space 2 is too low, the microcontroller 23 controls the stepping motor 31 to reduce the rotating speed delta V, so that the cooling effect is reduced;
step J: the upper computer 25 calculates whether the rotating speed of the stepping motor 31 is less than or equal to V0If yes, controlling the stepping motor 31 to stop rotating, controlling the main electromagnetic valve 32 to close, and returning to the step A; otherwise, entering a step K;
in this step, the upper computer 25 calculates whether the real-time rotation speed of the stepping motor 31 minus the rotation speed Δ V is equal to or less than V0If yes, the temperature of the physical space 2 is over low, the stepping motor 31 is controlled to stop rotating, the main electromagnetic valve 32 is controlled to close, and the step A is returned to for delay waiting;
step K: the upper computer 25 is delayed by a time t,
step L: the upper computer 25 obtains the real-time temperature T of the physical space 20，
In this step, the upper computer 25 again acquires the real-time temperature T of the physical space 20，
Step M: the upper computer 25 judges if T0＝T1Returning to the step K; continuing delaying for waiting;
if T is0<T1Returning to the step I; the step motor 31 is controlled to further reduce the rotating speed delta V, and the cooling effect is further reduced; the value of the reduced rotation speed Δ V is preset by the upper computer 25;
if T is0>T1And returning to the step C. And if the temperature is possibly raised due to solar irradiation at noon, returning to the step C to perform adjustment again.
By the above method, the upper computer 25 can intelligently control the temperature of the physical space 2, and stabilize the temperature of the physical space 2 at the temperature setting threshold T1. When the outside temperature is reduced to the set threshold value T1Thereafter, the stepping motor 31 is turned off.
The upper computer 25 can be set to a manual mode in which a user can set the switch and the rotation speed of the stepping motor 31 through a keyboard and can also control the switch of the main solenoid valve 32.
In the manual mode, the switches of the partial solenoid valves 33 can be set manually on the upper computer 25 by means of a keyboard.
In fig. 2, a support frame 6 is vertically arranged on the outer sides of two first water return tanks 1, a transparent water tank 7 is supported on the top of the support frame 6, the transparent water tank 7 covers the upper part of the physical space 2, a water pump 3 pumps cold water in a cooling water tank 4 and injects the cold water into the transparent water tank 7 through a water tank water injection pipe 71, a water tank water spray hole array 72 is arranged on the edge of the long side of the transparent water tank 7, and the water tank water spray hole array 72 is just positioned above the first water return tanks 1; the cold water dropping from the water tank water spraying hole array 72 forms a third cold water curtain to cover the long side surface of the first water return tank 1, and the dropped cold water flows back to the cooling water tank 4 through the first water return tank 1; the third cold water curtain and the transparent water tank 7 separate the physical space 2 from the external high-temperature environment and cool the physical space 2; the transparent water tank 7 is provided with a detachable transparent cover plate 73. The baffle 26 is fixedly connected with the end parts of the two first water return grooves 1 and the short side of the transparent water groove 7.
The cross section of the transparent water tank 7 is inverted 'convex', a concave water containing tank 74 is arranged in the middle of the transparent water tank, the width of the water containing tank 74 is larger than that of the physical space 2, steps 75 are formed on the left side and the right side of the water containing tank 74, and the water tank water spraying hole array 72 is arranged on the steps 75.
The water pump 3 is connected with the water tank water injection pipe 71 through a water pipe, cold water in the cooling water tank 4 extracted through the water pump 3 is injected into the transparent water tank 7 through the water tank water injection pipe 71, and the transparent water tank 7 plays a role in shielding rain and absorbing direct sunlight heat. The implementation does not affect the illumination intensity.
The transparent water tank 7 is provided with a detachable transparent cover plate 73, and is fixed with the top of the transparent water tank 7 through bolts. The cover plate 73 on the upper surface is removed as needed, and the transparent water tank 7 is cleaned.
Through the structure, the cross section of the transparent water tank 7 is inverted and is in a convex shape, the middle part of the transparent water tank is provided with the concave water containing tank 74, and the water containing tank 74 can store cold water with corresponding depth, so that the effect of better absorbing direct solar heat can be achieved.
The water pump 3 is connected with the water injection pipe 71 of the water tank through a water pipe after passing through the electromagnetic valve 76, the inner end of the water injection pipe 71 of the water tank penetrates into the transparent water tank 7, and the water injection hole arrays 71a are arranged on the two sides of the pipe body of the water injection pipe 71 of the water tank penetrating into the transparent water tank 7.
The inner of basin water injection pipe 71 is sealed, and the outer end opening, water pump 3 lead to pipe and link to each other with basin water injection pipe 311 open-ended outer end, and the water injection hole array 71a of basin water injection pipe 71 both sides is with cold water even blowout, is favorable to absorbing the heat of transparent basin 7 through cold water.
The upper computer 25 controls the on and off of the branch solenoid valve 76 via the microcontroller 23.
Be provided with camera 27 on the supporting rack 6, camera 27 is connected with host computer 25 through the cable, and host computer 25 obtains the surveillance video of the vegetable planting frame that camera 27 candids and shows in real time, makes things convenient for the managers control.
The first cold water curtain, the second cold water curtain, the third cold water curtain and the first cold water curtain formed by the two first water spraying pipes 12 are staggered from each other, so that mutual interference cannot occur.
FIG. 8 is another embodiment of the present invention, the device is installed in a transparent greenhouse 8, and two first water returning tanks 1 and two second water returning tanks 5 are not directly placed on the ground, but are hung on a cross beam 81 above the greenhouse 8 through a support 11 and a support frame 51; the second water return tank 5 is hung on a cross beam 81 above the greenhouse 8 through a support frame 51; the space below the two first water return grooves 1 and the second water return grooves 5 forms a physical space 2 for accommodating the vegetable planting frame, and cold water ejected from the first spray hole group 12a forms a first cold water curtain to absorb heat of sunlight above the physical space 2 and form sinking cold air flow to cool the physical space 2. The cold water emitted from the second spray hole group 52a forms a second cold water curtain to absorb heat of sunlight above the physical space 2 and forms a sinking cold air flow to cool the physical space 2.
Finally, it is noted that: the above-mentioned embodiments are only examples of the present invention, and it is a matter of course that those skilled in the art can make modifications and variations to the present invention, and it is considered that the present invention is protected by the modifications and variations if they are within the scope of the claims of the present invention and their equivalents.
Claims (6)
1. The utility model provides a local automatic heat sink based on bury cooling pond which characterized in that: the vegetable planting rack comprises two first water return grooves (1) which are parallel to each other, a physical space (2) for accommodating a vegetable planting rack is formed in a space between the two first water return grooves (1) or a space below the two first water return grooves, supports (11) are fixedly arranged on the outer walls of the two first water return grooves (1), and first water spraying pipes (12) which are parallel to the first water return grooves (1) are mounted on the supports (11); the first water spraying pipe (12) is connected with an outlet of the water pump (3), an inlet of the water pump (3) is connected with a buried cooling water tank (4), a first spraying hole group (12a) is arranged on the inner side of a pipe body of the first water spraying pipe (12), the first spraying hole group (12a) faces to the opposite first water returning tank (1), cold water sprayed out of the first spraying hole group (12a) is jetted into the opposite first water returning tank (1) through the upper air of the physical space (2), the first water returning tank (1) is communicated with the cooling water tank (4) through a water returning pipe (13), and cold water jetted out of the first spraying hole group (12a) forms a first cold water curtain to absorb heat of sunlight above the physical space (2) and form sinking cold water flow to cool the physical space (2);
a second water return tank (5) is arranged between the two first water return tanks (1) in parallel, the second water return tank (5) is also communicated with the cooling water tank (4) through a water return pipe (13), a support frame (51) is arranged in the middle of the second water return tank (5), second water spraying pipes (52) parallel to the second water return tank (5) are arranged on two sides of the support frame (51), the second water spraying pipes (52) are connected with an outlet of the water pump (3), a second spraying hole group (52a) is arranged on the outer side of each second water spraying pipe (52), the second spraying hole group (52a) faces to the opposite first water return tank (1), cold water sprayed out of the second spraying hole group (52a) is injected into the opposite first water return tank (1) through the upper air of the physical space (2), the cold water emitted from the second spraying hole group (52a) forms a second cold water curtain to absorb the heat of the sunlight above the physical space (2) and form sinking cold air flow to cool the physical space (2).
2. The local automatic cooling device based on the underground cooling water pool as claimed in claim 1, wherein: at least two first water spraying pipes (12) are arranged on the bracket (11); the first shower pipes (12) are arranged in parallel and at high and low positions, and the orifices of the first shower hole groups (12a) of all the first shower pipes (12) are arranged in a staggered manner along the length direction.
3. The local automatic cooling device based on the underground cooling water pool as claimed in claim 1, wherein: a baffle (14) is horizontally arranged in the middle of the first water return tank (1), a water permeable hole array (14a) penetrating through the baffle (14) is arranged on the baffle (14), a hollow space is formed by the baffle (14) and the bottom surface of the first water return tank (1), cold water flows into the hollow space through the water permeable hole array (14a), and the hollow space is communicated with the cooling water tank (4) through a water return pipe (13); and a water absorption filter layer is arranged on the baffle (14).
4. The local automatic cooling device based on the underground cooling water pool as claimed in claim 1, wherein: the water pump (3) is provided with a stepping motor (31), the water pump (3) is connected with a first water spraying pipe (12) through a main electromagnetic valve (32), the water pump (3) is connected with a second water spraying pipe (52) through a branch electromagnetic valve (33), the physical space (2) is provided with a temperature sensor (21), the temperature sensor (21) is connected with a microcontroller (23) through an analog-to-digital converter (22), the microcontroller (23) is connected with an upper computer (25), the microcontroller (23) is connected with a stepping motor driving module (24), the stepping motor driving module (24) drives the stepping motor (31) to rotate, and the upper computer (25) controls the stepping motor (31) to work through the microcontroller (23);
the upper computer (25) controls the switch of the main electromagnetic valve (32) and the branch electromagnetic valve (33) through the microcontroller (23).
5. The local automatic cooling device based on the underground cooling water pool as claimed in claim 1, wherein: a baffle plate (26) is fixedly connected between the end parts of the two first water return tanks (1) on the same side.
6. The method for cooling the local automatic cooling device based on the underground cooling water pool is characterized by comprising the following steps;
step A: the upper computer (25) acquires the real-time temperature T of the physical space (2) through the temperature sensor (21)0；
And B: the upper computer (25) judges if the real-time temperature T is0>T1，T1For the temperature threshold value, the upper computer (25) controls the main electromagnetic valve (32) to be opened, and the step C is carried out; otherwise, returning to the step A;
and C: the upper computer (25) controls the stepping motor (31) to operate at the maximum speed Vmax through the microcontroller (23), and the water pump (3) extracts cold water in the cooling water pool (4) and jets the cold water out through a first spraying hole group (12a) arranged on the first water spraying pipe (12) to form a first cold water curtain;
the first cold water curtain passes through the upper part of the physical space (2) to absorb the heat of direct sunlight; the first cold water curtain absorbs the heat of the physical space (2) and forms sinking cold air flow to cool the physical space (2);
step D: the upper computer (25) delays the time t;
step E: the upper computer (25) detects the real-time temperature T of the physical space (2) through the temperature sensor (21)0；
Step F: if the real-time temperature T0>T1Upper position ofThe computer (25) controls the opening of the branch electromagnetic valve (33) and controls the water pump (3) to pump cold water in the cooling water pool (4) to be ejected through a second spraying hole group (52a) arranged on the second spraying pipe (52) to form a second cold water curtain;
the second cold water curtain absorbs the heat of the physical space (2) and forms sinking cold air flow to cool the physical space (2);
entering the step G;
if the real-time temperature T0≤T1Entering step H;
step G: the upper computer (25) delays the time t; controlling the sub-electromagnetic valves (33) to be closed; entering the step D;
step H: the upper computer (25) judges if the real-time temperature T is0＝T1Returning to the step D;
otherwise, entering step I;
step I: the upper computer (25) judges if T is0<T1The upper computer (25) controls the stepping motor (31) to reduce the rotating speed delta V through the microcontroller (23); v0The rotating speed of a minimum stepping motor (31) is the rotating speed at which cold water ejected from the first water spraying pipe (12) can flow into the opposite first water return tank (1);
step J: the upper computer (25) calculates whether the rotating speed of the stepping motor (31) is less than or equal to V0If yes, controlling the stepping motor (31) to stop rotating, controlling the main electromagnetic valve (32) to close, and returning to the step A; otherwise, entering a step K;
step K: the upper computer (25) delays the time t,
step L: the upper computer (25) obtains the real-time temperature T of the physical space (2)0，
Step M: the upper computer (25) judges if T is0＝T1Returning to the step K;
if T is0<T1Returning to the step I;
if T is0>T1And returning to the step C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811354256.7A CN109452044B (en) | 2018-11-14 | 2018-11-14 | Local automatic cooling device based on underground cooling water pool and cooling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811354256.7A CN109452044B (en) | 2018-11-14 | 2018-11-14 | Local automatic cooling device based on underground cooling water pool and cooling method thereof |
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| Publication Number | Publication Date |
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| CN109452044A CN109452044A (en) | 2019-03-12 |
| CN109452044B true CN109452044B (en) | 2020-10-16 |
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| CN204762471U (en) * | 2015-04-15 | 2015-11-18 | 天津市嘉太源生农业开发有限公司 | Take cooling system's planting big -arch shelter |
| CN204968762U (en) * | 2015-08-04 | 2016-01-20 | 云南东凡农林科技有限公司 | From rain formula steelframe hot house cooling system |
| KR101734405B1 (en) * | 2016-09-23 | 2017-05-12 | (주)영진티앤디 | Air house |
| CN107114154B (en) * | 2017-05-18 | 2020-04-28 | 合肥市日之丰农业发展有限公司 | Glass greenhouse with water-saving wet curtain cooling device |
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