CN107372077B - Method and device for controlling temperature of nutrient solution - Google Patents
Method and device for controlling temperature of nutrient solution Download PDFInfo
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- CN107372077B CN107372077B CN201710527404.XA CN201710527404A CN107372077B CN 107372077 B CN107372077 B CN 107372077B CN 201710527404 A CN201710527404 A CN 201710527404A CN 107372077 B CN107372077 B CN 107372077B
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- 235000015097 nutrients Nutrition 0.000 title claims abstract description 243
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000007788 liquid Substances 0.000 claims abstract description 143
- 238000003860 storage Methods 0.000 claims abstract description 110
- 238000001816 cooling Methods 0.000 claims abstract description 79
- 239000003337 fertilizer Substances 0.000 claims abstract description 34
- 230000017525 heat dissipation Effects 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 49
- 230000001276 controlling effect Effects 0.000 claims description 47
- 230000033228 biological regulation Effects 0.000 claims description 23
- 210000003608 fece Anatomy 0.000 claims description 11
- 230000010354 integration Effects 0.000 claims description 11
- 239000010871 livestock manure Substances 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 11
- 238000004659 sterilization and disinfection Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 5
- 230000001954 sterilising effect Effects 0.000 claims description 5
- 238000013329 compounding Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- 238000010992 reflux Methods 0.000 abstract description 19
- 230000012010 growth Effects 0.000 description 24
- 238000004378 air conditioning Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000003749 cleanliness Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 235000016709 nutrition Nutrition 0.000 description 4
- 230000035764 nutrition Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 238000003973 irrigation Methods 0.000 description 2
- 230000002262 irrigation Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 238000009472 formulation Methods 0.000 description 1
- 235000012055 fruits and vegetables Nutrition 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009630 liquid culture Methods 0.000 description 1
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- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G31/00—Soilless cultivation, e.g. hydroponics
- A01G31/02—Special apparatus therefor
-
- 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
-
- 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
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
Abstract
The invention provides a temperature control method and a temperature control device for nutrient solution, wherein a reflux outlet of a production and cultivation area of a water-fertilizer integrated circulating system is connected to a reflux pipeline through a solenoid valve, the reflux pipeline is connected to a liquid storage tank, a plurality of cooling pipelines are respectively and correspondingly communicated with a plurality of heat dissipation pipelines at different depths away from the ground surface and then are connected to the liquid storage tank, and the method comprises the following steps: detecting the current temperature value of the nutrient solution in the liquid storage tank; if the current temperature value is within the range of a first preset threshold value, controlling the electromagnetic valve to open a valve of a return pipeline so as to enable the nutrient solution to flow back to the liquid storage tank through the return pipeline; and if the current temperature value is within a second preset threshold range, controlling the solenoid valve to open a valve of the cooling pipeline corresponding to the current temperature value according to the corresponding relation between the pre-stored temperature value and the cooling pipeline so as to correspondingly adjust the temperature of the nutrient solution, wherein the lower limit temperature value of the second preset threshold range is greater than or equal to the upper limit temperature value of the first preset threshold range.
Description
Technical Field
The invention relates to the technical field of intelligent planting, in particular to a temperature control method and a temperature control device for nutrient solution.
Background
In the growth process of the plant root system, the temperature has great influence on the growth of the plant root system, the ground temperature is lower than 8 ℃ or higher than 35 ℃, the plant root system basically stops growing, so the control of the temperature of nutrient solution in the soilless culture is an important cultivation measure for keeping the plant to grow for a long time and prolonging the supply period of crops such as fruits and vegetables, and the like, and the conventional nutrient solution circulating system can control the EC value (soluble salt content), the pH value (Hydrogen ion concentration index), the dissolved oxygen and the liquid level of the nutrient solution, but can not control the temperature.
At present, the main soilless culture modes mainly comprise ground deep liquid culture, shelf culture and pipeline culture, the liquid level is lower in the nutrient solution circulation process, the temperature in a greenhouse is higher in summer, the temperature rises quickly after the nutrient solution is circulated for many times, and the yield and the quality are influenced; in winter, the temperature of the nutrient solution is low, and the nutrient solution is not suitable for growth of plants.
In production, particularly in the production of crops such as soilless culture hydroponic vegetables and the like, in order to reduce the temperature of nutrient solution in a nutrient solution pool, methods such as cooling by ice blocks (prepared by a refrigerator or an ice chest), cooling by pumping underground cold water for heat exchange, cooling by a compression type air conditioning unit and the like are mainly adopted. The methods have the practical problems of large investment and high energy consumption, are only used in agricultural demonstration parks for a short time at present, and cannot be popularized and applied in production.
In addition, to current constant temperature nutrient solution soilless culture device, including the production cultivation district, through the intelligent liquid manure integration irrigation machine that the confession liquid pipeline is connected with the production cultivation district, the recovery nutrient solution in the production cultivation district is passed through the liquid return pipeline and is inputed to filtration system and sterilization system, input to the liquid reserve tank afterwards, the irrigation machine draws the nutrient solution from the liquid reserve tank, and carry again to the production cultivation district after adjusting according to the demand to the concentration of nutrient solution and pH value etc. and circulate in proper order, keep a relatively stable nutrient solution temperature, concentration and pH value.
In summary, the existing method for cooling the nutrient solution has high energy consumption and poor cooling effect, can not be accurately regulated and controlled, is not beneficial to the growth of crops, and is seen to lack an effective regulation and control method for the temperature of the nutrient solution at present, so how to control the temperature of the nutrient solution in soilless culture, thereby ensuring that the temperature of the nutrient solution is in a reasonable threshold range in the growth process of the crops, and becoming a technical problem to be solved urgently.
Disclosure of Invention
The invention provides a new temperature control scheme of nutrient solution based on at least one of the technical problems, and different temperature regulation schemes can be adopted based on different temperature conditions of the nutrient solution in the liquid storage tank of the water and fertilizer integrated circulation system in soilless culture, so that the temperature of the nutrient solution in the liquid storage tank can be accurately and effectively regulated, and the energy-saving effect is achieved.
In view of this, according to the technical solution of the first aspect of the present invention, there is provided a temperature control method for a nutrient solution, which is used for a water and fertilizer integrated circulation system in soilless culture, the water and fertilizer integrated circulation system includes a production and cultivation area, a backflow pipeline, a plurality of cooling pipelines and a liquid storage tank, a backflow liquid outlet of the production and cultivation area is connected to the backflow pipeline and the plurality of cooling pipelines through electromagnetic valves, the backflow pipeline is connected to the liquid storage tank, the plurality of cooling pipelines are respectively and correspondingly communicated with a plurality of heat dissipation pipelines at different depths from the ground surface and then connected to the liquid storage tank, and the temperature control method for the nutrient solution includes: detecting the current temperature value of the nutrient solution in the liquid storage tank; if the current temperature value is within the range of a first preset threshold value, controlling the electromagnetic valve to open a valve of a return pipeline so as to enable the nutrient solution to flow back to the liquid storage tank through the return pipeline; and if the current temperature value is within a second preset threshold range, controlling the solenoid valve to open a valve of the cooling pipeline corresponding to the current temperature value according to the corresponding relation between the pre-stored temperature value and the cooling pipeline so as to correspondingly adjust the temperature of the nutrient solution, wherein the lower limit temperature value of the second preset threshold range is greater than or equal to the upper limit temperature value of the first preset threshold range.
In the technical scheme, a solenoid valve is arranged between a reflux liquid outlet of a cultivation area in a water-fertilizer integrated circulating system for soilless culture and a reflux pipeline and a cooling pipeline, and the solenoid valve is controlled to open a pipeline corresponding to the current temperature of nutrient solution according to the temperature threshold range of the real-time temperature of the nutrient solution in a liquid storage pool in the water-fertilizer integrated circulating system, namely, different temperature adjusting schemes are adopted according to different temperature conditions of the nutrient solution in the liquid storage pool, so that the temperature of the nutrient solution in the liquid storage pool can be accurately and effectively adjusted, specifically, if the current temperature value of the nutrient solution in the liquid storage pool is in a normal first preset threshold range, a valve of the reflux pipeline is controlled to open by the solenoid valve, so that the nutrient solution quickly reflows to the liquid storage pool through the reflux pipeline, and if the current temperature value of the nutrient solution in the liquid storage pool is in a higher second preset threshold range, when the temperature of nutrient solution is not too high promptly, can control the solenoid valve according to the corresponding relation control valve of temperature value and cooling pipeline and open the valve with the target cooling pipeline that this current temperature value corresponds, because the heat dissipation pipeline that corresponds the intercommunication with cooling pipeline is located the different degree of depth of earth's surface below, then can be when the nutrient solution flows through the heat dissipation pipeline through the contact release heat of heat dissipation pipeline and soil, thereby realize the regulation to the nutrient solution temperature in the liquid reserve tank, reach the purpose of cooling, do not influence the healthy growth of crop with the temperature of ensureing the nutrient solution, especially the growth of root system, need not to start the temperature regulation apparatus of liquid manure integration circulation system simultaneously, energy-concerving and environment-protective effect has been.
The first preset threshold range may be 8-35 ℃, and the second preset threshold range may be 35-38 ℃.
In the above technical solution, preferably, the temperature control method of the nutrient solution further includes: and if the current temperature value is larger than the upper limit temperature value of the second preset threshold range, controlling the electromagnetic valve to open a valve of the backflow pipeline, and starting a temperature adjusting device of the water and fertilizer integrated circulating system to adjust the temperature of the nutrient solution.
In this technical scheme, when the current temperature value of nutrient solution had exceeded the upper limit temperature value of the second preset threshold range in the liquid reserve tank, can cause more serious influence to the growth of crop, then need control solenoid valve to open the valve of backflow pipeline to the temperature regulation device who adopts liquid manure integration circulation system realizes the quick adjustment cooling to the nutrient solution temperature, realize the temperature condition that the nutrient solution in the liquid reserve tank is different promptly, take different temperature regulation scheme, thereby can be accurate and adjust the temperature of nutrient solution in the liquid reserve tank effectively.
In any one of the above technical solutions, preferably, the step of starting the temperature adjustment device of the water and fertilizer integrated circulation system to cool the nutrient solution flowing through the return pipeline includes: controlling a water pumping device to pump underground cold water to cool the nutrient solution flowing through the return pipeline; or controlling to start the compressor type air conditioning unit to cool the nutrient solution flowing through the return pipeline.
In the technical scheme, when the current temperature value of the nutrient solution in the liquid storage tank is too high and exceeds the upper limit temperature value of the second preset threshold range, and serious influence is caused on the growth of crops, in order to quickly adjust the temperature of the nutrient solution in the liquid storage tank, a temperature adjusting device of the water and fertilizer integrated circulating system needs to be started, specifically, the temperature can be adjusted by controlling a water pumping device to pump underground cold water to cool the nutrient solution flowing through the return pipeline, and the temperature can also be adjusted by controlling a compressor-started air conditioning unit to cool the nutrient solution flowing through the return pipeline; of course, other ways of achieving rapid temperature adjustment, such as cooling of ice cubes, etc., may also be used.
In any of the above technical solutions, preferably, before detecting the current temperature value of the nutrient solution in the liquid storage tank, the method for controlling the temperature of the nutrient solution further includes: and storing the corresponding relation between different temperature values of the nutrient solution and the cooling pipeline.
In the technical scheme, in order to ensure that different temperature adjusting schemes can be adopted according to different temperature conditions of the nutrient solution in the liquid storage tank, so that the temperature of the nutrient solution in the liquid storage tank can be accurately and effectively adjusted, the corresponding relation between different temperature values of the nutrient solution and the temperature reducing pipeline needs to be stored in advance, and the electromagnetic valve is controlled to open the valve of the corresponding temperature reducing pipeline according to the temperature value of the nutrient solution in the liquid storage tank detected in real time; specifically, the corresponding relationship between different temperature values of the nutrient solution and the cooling pipeline can be obtained by analyzing a large amount of experimental data.
In any of the above technical solutions, preferably, the method for controlling the temperature of the nutrient solution further includes: before the nutrient solution after temperature adjustment is returned to the liquid storage tank, the nutrient solution is sterilized, filtered and/or compounded.
In the technical scheme, in order to ensure the cleanliness and the nutrient concentration of the nutrient solution flowing back to the liquid storage tank, the nutrient solution subjected to temperature regulation treatment can be disinfected, sterilized, filtered and/or compounded before flowing back to the liquid storage tank, so that the nutrient solution with proper and pure nutrition can be provided for crops, and the growth of the crops is facilitated.
According to the technical scheme of the second aspect of the invention, a temperature control device for nutrient solution is provided, the temperature control device is used for a water and fertilizer integrated circulating system in soilless culture, the water and fertilizer integrated circulating system comprises a production and cultivation area, a backflow pipeline, a plurality of cooling pipelines and a liquid storage tank, a backflow liquid outlet of the production and cultivation area is connected to the backflow pipeline and the plurality of cooling pipelines through electromagnetic valves, the backflow pipeline is connected to the liquid storage tank, the plurality of cooling pipelines are correspondingly communicated with a plurality of heat dissipation pipelines at different depths from the earth surface and then are connected to the liquid storage tank, and then the temperature control device for nutrient solution comprises: the detection module is used for detecting the current temperature value of the nutrient solution in the liquid storage tank; the first control module is used for controlling the solenoid valve to open a valve of the backflow pipeline when the current temperature value is within a first preset threshold range, so that the nutrient solution flows back to the liquid storage tank through the backflow pipeline; and the second control module is used for controlling the solenoid valve to open the valve of the cooling pipeline corresponding to the current temperature value according to the corresponding relation between the pre-stored temperature value and the cooling pipeline so as to correspondingly adjust the temperature of the nutrient solution when the current temperature value is within a second preset threshold range, wherein the lower limit temperature value of the second preset threshold range is greater than or equal to the upper limit temperature value of the first preset threshold range.
In the technical scheme, a solenoid valve is arranged between a reflux liquid outlet of a cultivation area in a water-fertilizer integrated circulating system for soilless culture and a reflux pipeline and a cooling pipeline, and the solenoid valve is controlled to open a pipeline corresponding to the current temperature of nutrient solution according to the temperature threshold range of the real-time temperature of the nutrient solution in a liquid storage pool in the water-fertilizer integrated circulating system, namely, different temperature adjusting schemes are adopted according to different temperature conditions of the nutrient solution in the liquid storage pool, so that the temperature of the nutrient solution in the liquid storage pool can be accurately and effectively adjusted, specifically, if the current temperature value of the nutrient solution in the liquid storage pool is in a normal first preset threshold range, a valve of the reflux pipeline is controlled to open by the solenoid valve, so that the nutrient solution quickly reflows to the liquid storage pool through the reflux pipeline, and if the current temperature value of the nutrient solution in the liquid storage pool is in a higher second preset threshold range, when the temperature of nutrient solution is not too high promptly, can control the solenoid valve according to the corresponding relation control valve of temperature value and cooling pipeline and open the valve with the target cooling pipeline that this current temperature value corresponds, because the heat dissipation pipeline that corresponds the intercommunication with cooling pipeline is located the different degree of depth of earth's surface below, then can be when the nutrient solution flows through the heat dissipation pipeline through the contact release heat of heat dissipation pipeline and soil, thereby realize the regulation to the nutrient solution temperature in the liquid reserve tank, reach the purpose of cooling, do not influence the healthy growth of crop with the temperature of ensureing the nutrient solution, especially the growth of root system, need not to start the temperature regulation apparatus of liquid manure integration circulation system simultaneously, energy-concerving and environment-protective effect has been.
The first preset threshold range may be 8-35 ℃, and the second preset threshold range may be 35-38 ℃.
In the above technical solution, preferably, the temperature control device for nutrient solution further includes: and the third control module is used for controlling the electromagnetic valve to open a valve of the backflow pipeline and starting a temperature adjusting device of the water-fertilizer integrated circulating system to adjust the temperature of the nutrient solution when the current temperature value is larger than the upper limit temperature value of the second preset threshold range.
In this technical scheme, when the current temperature value of nutrient solution had exceeded the upper limit temperature value of the second preset threshold range in the liquid reserve tank, can cause more serious influence to the growth of crop, then need control solenoid valve to open the valve of backflow pipeline to the temperature regulation device who adopts liquid manure integration circulation system realizes the quick adjustment cooling to the nutrient solution temperature, realize the temperature condition that the nutrient solution in the liquid reserve tank is different promptly, take different temperature regulation scheme, thereby can be accurate and adjust the temperature of nutrient solution in the liquid reserve tank effectively.
In any one of the above technical solutions, preferably, the third control module is specifically configured to, when the current temperature value is greater than an upper limit temperature value of the second preset threshold range, control the electromagnetic valve to open the valve of the return line: controlling a water pumping device to pump underground cold water to cool the nutrient solution flowing through the return pipeline; or controlling to start the compressor type air conditioning unit to cool the nutrient solution flowing through the return pipeline.
In the technical scheme, when the current temperature value of the nutrient solution in the liquid storage tank is too high and exceeds the upper limit temperature value of the second preset threshold range, and serious influence is caused on the growth of crops, in order to quickly adjust the temperature of the nutrient solution in the liquid storage tank, a temperature adjusting device of the water and fertilizer integrated circulating system needs to be started, specifically, the temperature can be adjusted by controlling a water pumping device to pump underground cold water to cool the nutrient solution flowing through the return pipeline, and the temperature can also be adjusted by controlling a compressor-started air conditioning unit to cool the nutrient solution flowing through the return pipeline; of course, other ways of achieving rapid temperature adjustment, such as cooling of ice cubes, etc., may also be used.
In any of the above technical solutions, preferably, the temperature control device for nutrient solution further includes: and the storage module is used for storing the corresponding relation between different temperature values of the nutrient solution and the cooling pipeline before the detection module detects the current temperature value of the nutrient solution in the liquid storage tank.
In the technical scheme, in order to ensure that different temperature adjusting schemes can be adopted according to different temperature conditions of the nutrient solution in the liquid storage tank, so that the temperature of the nutrient solution in the liquid storage tank can be accurately and effectively adjusted, the corresponding relation between different temperature values of the nutrient solution and the temperature reducing pipeline needs to be stored in advance, and the electromagnetic valve is controlled to open the valve of the corresponding temperature reducing pipeline according to the temperature value of the nutrient solution in the liquid storage tank detected in real time; specifically, the corresponding relationship between different temperature values of the nutrient solution and the cooling pipeline can be obtained by analyzing a large amount of experimental data.
In any of the above technical solutions, preferably, the temperature control device for nutrient solution further includes: and the processing module is used for carrying out disinfection, sterilization, filtration and/or compounding operations on the nutrient solution before the nutrient solution subjected to temperature regulation reflows to the liquid storage tank.
In the technical scheme, in order to ensure the cleanliness and the nutrient concentration of the nutrient solution flowing back to the liquid storage tank, the nutrient solution subjected to temperature regulation treatment can be disinfected, sterilized, filtered and/or compounded before flowing back to the liquid storage tank, so that the nutrient solution with proper and pure nutrition can be provided for crops, and the growth of the crops is facilitated.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic flow diagram of a method for temperature control of a nutrient solution according to a first embodiment of the invention;
fig. 2 shows a schematic flow diagram of a method for temperature control of a nutrient solution according to a second embodiment of the invention;
fig. 3 shows a schematic block diagram of a temperature control device for nutrient solution according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The following describes in detail a temperature control scheme of a nutrient solution according to an embodiment of the present invention with reference to fig. 1 to 3, where the temperature control scheme of the nutrient solution according to an embodiment of the present invention is used for a water and fertilizer integrated circulation system in soilless culture, the water and fertilizer integrated circulation system includes a production and cultivation area, a backflow pipeline, a plurality of cooling pipelines and a liquid storage tank, a backflow liquid outlet of the production and cultivation area is connected to the backflow pipeline and the plurality of cooling pipelines through a solenoid valve, and the backflow pipeline is connected to the liquid storage tank, the plurality of cooling pipelines are respectively communicated with a plurality of heat dissipation pipelines at different depths from the ground surface and then connected to the liquid storage tank, that is, the production and cultivation area and the liquid storage tank are communicated through a backflow channel, a plurality of mutually communicated cooling pipelines and heat dissipation pipelines to form the water and fertilizer integrated circulation system, preferably, the backflow pipeline is located, so as to be beneficial to heat conduction and achieve the purpose of cooling.
Fig. 1 shows a schematic flow chart of a temperature control method of a nutrient solution according to a first embodiment of the present invention.
As shown in fig. 1, the method for controlling the temperature of a nutrient solution according to the first embodiment of the present invention specifically includes the following steps:
And 104, if the current temperature value is within a first preset threshold range, controlling the electromagnetic valve to open a valve of the backflow pipeline so as to enable the nutrient solution to flow back to the liquid storage tank through the backflow pipeline.
And 106, if the current temperature value is within a second preset threshold range, controlling the solenoid valve to open a valve of the cooling pipeline corresponding to the current temperature value according to the corresponding relation between the pre-stored temperature value and the cooling pipeline so as to correspondingly adjust the temperature of the nutrient solution, wherein the lower limit temperature value of the second preset threshold range is greater than or equal to the upper limit temperature value of the first preset threshold range.
Wherein, the execution of the step 104 and the step 106 is not limited in sequence.
In the embodiment, a solenoid valve is arranged between a reflux liquid outlet of a cultivation area in a water and fertilizer integrated circulating system for soilless cultivation and a reflux pipeline and a cooling pipeline, and the solenoid valve is controlled to open a pipeline corresponding to the current temperature of nutrient solution according to the temperature threshold range of the real-time temperature of the nutrient solution in a liquid storage pool in the water and fertilizer integrated circulating system, namely, different temperature adjusting schemes are adopted according to different temperature conditions of the nutrient solution in the liquid storage pool, so that the temperature of the nutrient solution in the liquid storage pool can be accurately and effectively adjusted, specifically, if the current temperature value of the nutrient solution in the liquid storage pool is in a normal first preset threshold range, a valve of the reflux pipeline is controlled to open by the solenoid valve, so that the nutrient solution quickly flows back to the liquid storage pool through the reflux pipeline, and if the current temperature value of the nutrient solution in the liquid storage pool is in a higher second preset threshold range, when the temperature of nutrient solution is not too high promptly, can control the solenoid valve according to the corresponding relation control valve of temperature value and cooling pipeline and open the valve with the target cooling pipeline that this current temperature value corresponds, because the heat dissipation pipeline that corresponds the intercommunication with cooling pipeline is located the different degree of depth of earth's surface below, then can be when the nutrient solution flows through the heat dissipation pipeline through the contact release heat of heat dissipation pipeline and soil, thereby realize the regulation to the nutrient solution temperature in the liquid reserve tank, reach the purpose of cooling, do not influence the healthy growth of crop with the temperature of ensureing the nutrient solution, especially the growth of root system, need not to start the temperature regulation apparatus of liquid manure integration circulation system simultaneously, energy-concerving and environment-protective effect has been.
The first preset threshold range may be 8-35 ℃, and the second preset threshold range may be 35-38 ℃.
Fig. 2 shows a schematic flow chart of a temperature control method of a nutrient solution according to a second embodiment of the present invention.
As shown in fig. 2, a temperature control method for a nutrient solution according to a second embodiment of the present invention includes steps 202 to 206 that are substantially the same as the steps 102 to 106 shown in fig. 1, except that the temperature control method for a nutrient solution further includes:
and 208, if the current temperature value is larger than the upper limit temperature value of the second preset threshold range, controlling the solenoid valve to open a valve of the backflow pipeline, and starting a temperature adjusting device of the water and fertilizer integrated circulation system to adjust the temperature of the nutrient solution, wherein the temperature adjusting device can be positioned in a liquid storage tank.
Wherein, the execution of steps 204 to 208 in fig. 2 is not limited in sequence.
In this embodiment, when the current temperature value of nutrient solution in the liquid storage tank was too high and had exceeded the upper limit temperature value of second preset threshold value scope, can cause more serious influence to the growth of crop, then need control solenoid valve to open the valve of backflow pipeline to the temperature regulation device who adopts liquid manure integration circulation system realizes the quick adjustment cooling to the nutrient solution temperature, realizes promptly according to the different temperature conditions of nutrient solution in the liquid storage tank, takes different temperature regulation scheme, thereby can be accurate and adjust the temperature of nutrient solution in the liquid storage tank effectively.
Further, in the above embodiment, the step 208 of starting the temperature adjustment device of the water and fertilizer integrated circulation system to cool the nutrient solution flowing through the return pipeline specifically includes: controlling a water pumping device to pump underground cold water to cool the nutrient solution flowing through the return pipeline; or controlling to start the compressor type air conditioning unit to cool the nutrient solution flowing through the return pipeline.
In this embodiment, when the current temperature value of the nutrient solution in the liquid storage tank is too high and exceeds the upper limit temperature value of the second preset threshold range, which may cause serious influence on the growth of crops, in order to quickly adjust the temperature of the nutrient solution in the liquid storage tank, a temperature adjusting device of the water and fertilizer integrated circulation system needs to be started, specifically, the temperature may be adjusted by controlling a water pumping device to pump underground cold water to cool the nutrient solution flowing through the return pipeline, or may be adjusted by controlling a compressor-started air conditioner to cool the nutrient solution flowing through the return pipeline; of course, other ways of achieving rapid temperature adjustment, such as cooling of ice cubes, etc., may also be used.
Further, in any of the above embodiments, before the detecting a current temperature value of the nutrient solution in the liquid storage tank in step 102 or step 202, the method for controlling the temperature of the nutrient solution further includes: and storing the corresponding relation between different temperature values of the nutrient solution and the cooling pipeline.
In this embodiment, in order to ensure that different temperature adjustment schemes can be adopted according to different temperature conditions of the nutrient solution in the liquid storage tank, so as to accurately and effectively adjust the temperature of the nutrient solution in the liquid storage tank, the corresponding relationship between different temperature values of the nutrient solution and the cooling pipeline needs to be stored in advance, so as to control the electromagnetic valve to open the valve of the corresponding cooling pipeline according to the temperature value of the nutrient solution in the liquid storage tank detected in real time; specifically, the corresponding relationship between different temperature values of the nutrient solution and the cooling pipeline can be obtained by analyzing a large amount of experimental data.
Further, in any of the above embodiments, the method for controlling the temperature of the nutrient solution further includes: before the nutrient solution after temperature adjustment is returned to the liquid storage tank, the nutrient solution is sterilized, filtered and/or compounded.
In this embodiment, in order to ensure the cleanliness and the nutrient concentration of the nutrient solution flowing back into the liquid storage tank, the nutrient solution after temperature adjustment treatment may be sterilized, filtered and/or compounded before flowing back into the liquid storage tank, so as to ensure that a nutrient solution with proper and pure nutrition is provided for crops, which is beneficial to the growth of crops.
Fig. 3 shows a schematic block diagram of a temperature control device for nutrient solution according to an embodiment of the present invention.
As shown in fig. 3, a temperature control apparatus 30 for nutrient solution according to an embodiment of the present invention includes: a detection module 302, a first control module 304, and a second control module 306.
The detection module 302 is configured to detect a current temperature value of the nutrient solution in the liquid storage tank; the first control module 304 is configured to control the solenoid valve to open a valve of the backflow pipeline when the current temperature value is within a first preset threshold range, so that the nutrient solution flows back to the liquid storage tank through the backflow pipeline; the second control module 306 is configured to, when the current temperature value is within a second preset threshold range, control the solenoid valve to open a valve of the cooling pipeline corresponding to the current temperature value according to a correspondence between a pre-stored temperature value and the cooling pipeline, so as to correspondingly adjust the temperature of the nutrient solution, where a lower limit temperature value of the second preset threshold range is greater than or equal to an upper limit temperature value of the first preset threshold range.
In the embodiment, a solenoid valve is arranged between a reflux liquid outlet of a cultivation area in a water and fertilizer integrated circulating system for soilless cultivation and a reflux pipeline and a cooling pipeline, and the solenoid valve is controlled to open a pipeline corresponding to the current temperature of nutrient solution according to the temperature threshold range of the real-time temperature of the nutrient solution in a liquid storage pool in the water and fertilizer integrated circulating system, namely, different temperature adjusting schemes are adopted according to different temperature conditions of the nutrient solution in the liquid storage pool, so that the temperature of the nutrient solution in the liquid storage pool can be accurately and effectively adjusted, specifically, if the current temperature value of the nutrient solution in the liquid storage pool is in a normal first preset threshold range, a valve of the reflux pipeline is controlled to open by the solenoid valve, so that the nutrient solution quickly flows back to the liquid storage pool through the reflux pipeline, and if the current temperature value of the nutrient solution in the liquid storage pool is in a higher second preset threshold range, when the temperature of nutrient solution is not too high promptly, can control the solenoid valve according to the corresponding relation control valve of temperature value and cooling pipeline and open the valve with the target cooling pipeline that this current temperature value corresponds, because the heat dissipation pipeline that corresponds the intercommunication with cooling pipeline is located the different degree of depth of earth's surface below, then can be when the nutrient solution flows through the heat dissipation pipeline through the contact release heat of heat dissipation pipeline and soil, thereby realize the regulation to the nutrient solution temperature in the liquid reserve tank, reach the purpose of cooling, do not influence the healthy growth of crop with the temperature of ensureing the nutrient solution, especially the growth of root system, need not to start the temperature regulation apparatus of liquid manure integration circulation system simultaneously, energy-concerving and environment-protective effect has been.
The first preset threshold range may be 8-35 ℃, and the second preset threshold range may be 35-38 ℃.
Further, in the above embodiment, the temperature control device 30 for nutrient solution further includes: and the third control module 308 is configured to control the solenoid valve to open a valve of the backflow pipeline and start a temperature adjusting device of the water and fertilizer integrated circulation system to adjust the temperature of the nutrient solution when the current temperature value is greater than the upper limit temperature value of the second preset threshold range.
In this embodiment, when the current temperature value of nutrient solution in the liquid storage tank was too high and had exceeded the upper limit temperature value of second preset threshold value scope, can cause more serious influence to the growth of crop, then need control solenoid valve to open the valve of backflow pipeline to the temperature regulation device who adopts liquid manure integration circulation system realizes the quick adjustment cooling to the nutrient solution temperature, realizes promptly according to the different temperature conditions of nutrient solution in the liquid storage tank, takes different temperature regulation scheme, thereby can be accurate and adjust the temperature of nutrient solution in the liquid storage tank effectively.
Further, in the above embodiment, when the current temperature value is greater than the upper limit temperature value of the second preset threshold range, the third control module 308 is specifically configured to: controlling a water pumping device to pump underground cold water to cool the nutrient solution flowing through the return pipeline; or controlling to start the compressor type air conditioning unit to cool the nutrient solution flowing through the return pipeline.
In this embodiment, when the current temperature value of the nutrient solution in the liquid storage tank is too high and exceeds the upper limit temperature value of the second preset threshold range, which may cause serious influence on the growth of crops, in order to quickly adjust the temperature of the nutrient solution in the liquid storage tank, a temperature adjusting device of the water and fertilizer integrated circulation system needs to be started, specifically, the temperature may be adjusted by controlling a water pumping device to pump underground cold water to cool the nutrient solution flowing through the return pipeline, or may be adjusted by controlling a compressor-started air conditioner to cool the nutrient solution flowing through the return pipeline; of course, other ways of achieving rapid temperature adjustment, such as cooling of ice cubes, etc., may also be used.
Further, in the above embodiment, the temperature control device 30 for nutrient solution further includes: the storage module 310 is configured to store a corresponding relationship between different temperature values of the nutrient solution and the cooling pipeline before the detection module 302 detects the current temperature value of the nutrient solution in the liquid storage tank.
In this embodiment, in order to ensure that different temperature adjustment schemes can be adopted according to different temperature conditions of the nutrient solution in the liquid storage tank, so as to accurately and effectively adjust the temperature of the nutrient solution in the liquid storage tank, the corresponding relationship between different temperature values of the nutrient solution and the cooling pipeline needs to be stored in advance, so as to control the electromagnetic valve to open the valve of the corresponding cooling pipeline according to the temperature value of the nutrient solution in the liquid storage tank detected in real time; specifically, the corresponding relationship between different temperature values of the nutrient solution and the cooling pipeline can be obtained by analyzing a large amount of experimental data.
Further, in the above embodiment, the temperature control device 30 for nutrient solution further includes: a processing module 312, configured to perform disinfection, sterilization, filtration, and/or re-formulation operations on the nutrient solution before returning the temperature-adjusted nutrient solution to the liquid storage tank.
In this embodiment, in order to ensure the cleanliness and the nutrient concentration of the nutrient solution flowing back into the liquid storage tank, the nutrient solution after temperature adjustment treatment may be sterilized, filtered and/or compounded before flowing back into the liquid storage tank, so as to ensure that a nutrient solution with proper and pure nutrition is provided for crops, which is beneficial to the growth of crops.
Further, any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
The technical scheme of the invention is explained in detail in the above with the accompanying drawings, and different temperature adjusting schemes can be adopted based on different temperature conditions of the nutrient solution in the liquid storage tank of the water and fertilizer integrated circulating system in soilless culture, so that the temperature of the nutrient solution in the liquid storage tank can be accurately and effectively adjusted and the energy-saving effect is achieved.
In the description of the present specification, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and specific meanings of the above terms in the disclosed embodiments may be understood according to specific situations by those of ordinary skill in the art.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A temperature control method of nutrient solution is used for a water and fertilizer integrated circulating system in soilless culture and is characterized in that the water and fertilizer integrated circulating system comprises a production and cultivation area, a backflow pipeline, a plurality of cooling pipelines and a liquid storage tank, a backflow liquid outlet of the production and cultivation area is connected to the backflow pipeline and the plurality of cooling pipelines through a solenoid valve, the backflow pipeline is connected to the liquid storage tank, the plurality of cooling pipelines are correspondingly communicated with a plurality of heat dissipation pipelines which are different from the earth surface in depth respectively and then are connected to the liquid storage tank, and then the temperature control method of the nutrient solution comprises the following steps:
detecting the current temperature value of the nutrient solution in the liquid storage tank;
if the current temperature value is within a first preset threshold range, controlling the electromagnetic valve to open a valve of the backflow pipeline so as to enable the nutrient solution to flow back to the liquid storage tank through the backflow pipeline;
and if the current temperature value is within a second preset threshold value range, controlling the electromagnetic valve to open a valve of the cooling pipeline corresponding to the current temperature value according to a corresponding relation between a pre-stored temperature value and the cooling pipeline so as to correspondingly adjust the temperature of the nutrient solution, wherein the lower limit temperature value of the second preset threshold value range is greater than or equal to the upper limit temperature value of the first preset threshold value range.
2. The method for controlling the temperature of a nutrient solution according to claim 1, further comprising:
and if the current temperature value is larger than the upper limit temperature value of the second preset threshold range, controlling the electromagnetic valve to open a valve of the backflow pipeline, and starting a temperature adjusting device of the water and fertilizer integrated circulating system to adjust the temperature of the nutrient solution.
3. The method for controlling the temperature of the nutrient solution according to claim 2, wherein the step of starting the temperature regulating device of the integrated water and fertilizer circulation system to cool the nutrient solution flowing through the return pipeline comprises the following steps:
controlling a water pumping device to pump underground cold water to cool the nutrient solution flowing through the return pipeline;
or
And controlling to start the compressor type air conditioner unit to cool the nutrient solution flowing through the return pipeline.
4. The method according to any one of claims 1 to 3, further comprising, before the detecting a current temperature value of the nutrient solution in the reservoir:
and storing the corresponding relation between different temperature values of the nutrient solution and the cooling pipeline.
5. The method of controlling the temperature of a nutrient solution according to any one of claims 1 to 3, further comprising:
and before the nutrient solution subjected to temperature regulation is refluxed to the liquid storage tank, the nutrient solution is subjected to disinfection, sterilization, filtration and/or compounding operation.
6. The utility model provides a temperature control device of nutrient solution for liquid manure integration circulation system among soilless culture, a serial communication port, liquid manure integration circulation system is including production cultivation district, backflow pipeline, many cooling tube and liquid reserve tank, the backflow liquid export in production cultivation district is connected to through the solenoid valve backflow pipeline with many cooling tube, and backflow pipeline is connected to the liquid reserve tank, many cooling tube correspond with many heat dissipation pipeline apart from the different degree of depth in earth's surface respectively and communicate the back and be connected to the liquid reserve tank, then the temperature control device of nutrient solution includes:
the detection module is used for detecting the current temperature value of the nutrient solution in the liquid storage tank;
the first control module is used for controlling the electromagnetic valve to open a valve of the backflow pipeline when the current temperature value is within a first preset threshold range, so that the nutrient solution flows back to the liquid storage tank through the backflow pipeline;
and the second control module is used for controlling the electromagnetic valve to open a valve of the cooling pipeline corresponding to the current temperature value according to the corresponding relation between a pre-stored temperature value and the cooling pipeline so as to correspondingly adjust the temperature of the nutrient solution when the current temperature value is within a second preset threshold range, wherein the lower limit temperature value of the second preset threshold range is greater than or equal to the upper limit temperature value of the first preset threshold range.
7. The apparatus for controlling temperature of nutrient solution according to claim 6, further comprising:
and the third control module is used for controlling the electromagnetic valve to open the valve of the return pipeline and starting the temperature adjusting device of the water and fertilizer integrated circulating system to adjust the temperature of the nutrient solution when the current temperature value is greater than the upper limit temperature value of the second preset threshold range.
8. The temperature control device of nutrient solution according to claim 7, wherein the third control module is specifically configured to, when the current temperature value is greater than the upper limit temperature value of the second preset threshold range, control the electromagnetic valve to open the valve of the return line:
controlling a water pumping device to pump underground cold water to cool the nutrient solution flowing through the return pipeline;
or
And controlling to start the compressor type air conditioner unit to cool the nutrient solution flowing through the return pipeline.
9. The apparatus for controlling temperature of nutrient solution according to any one of claims 6 to 8, further comprising:
and the storage module is used for storing the corresponding relation between different temperature values of the nutrient solution and the cooling pipeline before the detection module detects the current temperature value of the nutrient solution in the liquid storage tank.
10. The apparatus for controlling temperature of nutrient solution according to any one of claims 6 to 8, further comprising:
and the processing module is used for carrying out disinfection, sterilization, filtration and/or compounding operation on the nutrient solution before the nutrient solution subjected to temperature regulation reflows to the liquid storage tank.
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| CN113333451B (en) * | 2021-06-03 | 2022-09-16 | 重庆环投再生资源开发有限公司 | Heavy metal contaminated soil chemical remediation safety regeneration equipment |
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| CN103299892A (en) * | 2013-07-01 | 2013-09-18 | 湖南农业大学 | Cluster-type water temperature control system for floating tobacco seedling growing pond |
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