CN112243994A - Air-conditioning insecticidal system and method - Google Patents
Air-conditioning insecticidal system and method Download PDFInfo
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- CN112243994A CN112243994A CN202011117769.3A CN202011117769A CN112243994A CN 112243994 A CN112243994 A CN 112243994A CN 202011117769 A CN202011117769 A CN 202011117769A CN 112243994 A CN112243994 A CN 112243994A
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Abstract
The invention relates to a system and a method for killing insects by air regulation, which comprises the following steps: carrying out airtight enclosure; a nitrogen gas supply configured to provide nitrogen gas; a conditioning device configured to provide gas from the nitrogen gas supply device to the gas-tight enclosure and to condition a humidity of the gas from the nitrogen gas supply device; and a control device configured to control an oxygen content within the airtight enclosure to be lower than the first oxygen content range, and to control a humidity within the airtight enclosure to be in the first humidity range. The low-oxygen air-conditioning auxiliary humidity control air-conditioning insect killing technology improves the insect killing efficiency, shortens the insect killing period and saves the energy consumption.
Description
Technical Field
The invention relates to the field of controlled atmosphere disinsection, in particular to a controlled atmosphere disinsection system and a controlled atmosphere disinsection method.
Background
The traditional Chinese medicinal materials are raw materials for production in the traditional Chinese medicine industry, are the material basis for inheritance and development of the traditional Chinese medicine industry, and the quality of the traditional Chinese medicinal materials is directly related to the healthy development of the traditional Chinese medicine industry in China. Insect pests are one of the most major problems encountered in the storage process of Chinese herbal medicines. The Chinese medicinal materials gnawed by insects not only have reduced drug property and weight, but also have influence on edibility, post processing and market sale of the Chinese medicinal materials due to residual stickies and feces in the Chinese medicinal materials. The storage of the traditional Chinese medicinal materials for disinsection and insect prevention is an important measure for ensuring the quality of the traditional Chinese medicinal materials, and is also an important link for reducing loss and improving economic benefit.
In the prior technical field of traditional Chinese medicinal material insect killing, a series of insect killing methods which are harmful and polluted to human bodies, such as chemical fumigation, physical radiation and the like, are gradually replaced by the low-oxygen controlled-atmosphere insect killing method. However, the low-oxygen air-conditioning technology has relatively long insecticidal time, is limited by factors such as insect categories, storage forms and the like, and the short insecticidal time is ten days, and the long insecticidal time is one month or even longer. The large-scale traditional Chinese medicine insecticidal storehouse usually stores raw material medicines or traditional Chinese medicine decoction pieces by using woven bags with larger volume and stacks the raw material medicines or the traditional Chinese medicine decoction pieces in the form of stacking or turnover trays and the like, so that gas diffusion is slow, and the insecticidal efficiency is influenced.
How to further improve the efficiency of the low-oxygen controlled-atmosphere disinsection makes the low-oxygen controlled-atmosphere technology have faster speed of killing insects of the traditional Chinese medicine and higher death rate of insects, and has very important significance for the field.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a controlled atmosphere insecticidal system, which comprises: carrying out airtight enclosure; a nitrogen gas supply configured to provide dry clean nitrogen gas; a conditioning device configured to provide gas from the nitrogen gas supply device to the gas-tight enclosure and to condition a humidity of the gas from the nitrogen gas supply device; and a control device configured to control an oxygen content within the airtight enclosure to be lower than the first oxygen content range, and to control a humidity within the airtight enclosure to be in the first humidity range.
The modified atmosphere insecticidal system as described above, wherein the first oxygen content is in the range of 0-3%, preferably 0-2%, more preferably 0-0.5%.
A modified atmosphere insecticidal system as described above wherein the first humidity range is 15% to 45% RH, preferably 15% to 25% RH.
The controlled atmosphere insecticidal system as described above, wherein the first oxygen content range is 0-0.5% and the first humidity range is 15% -45% RH.
The controlled atmosphere insecticidal system as described above, wherein the first oxygen content range is 0% -2% and the first humidity range is 15% -25% RH.
The modified atmosphere insecticidal system is characterized in that the pests in the airtight enclosure are tobacco beetles and tribolium castaneum.
The modified atmosphere insecticidal system of above, further comprising an oxygen content detector, wherein the control device is configured to provide a low oxygen gas to the airtight enclosure in response to the oxygen content within the airtight enclosure being above the first oxygen range.
The modified atmosphere insecticidal system as described above, the regulating device further comprising: a humidity control assembly configured to provide a humidity conditioned gas into the airtight enclosure or to condition the humidity of an existing gas within the airtight enclosure.
The modified atmosphere insecticidal system of the above, further comprising a humidity measurement component, wherein the control device is configured to provide humidity-modified hypoxic gas into the airtight enclosure in response to the humidity within the airtight enclosure exceeding a first humidity range.
The air-conditioning insecticidal system comprises an airtight enclosure, an airtight cabinet, an airtight storehouse and a control system.
A combined controlled atmosphere insecticidal method comprising providing hypoxic gas into an airtight enclosure; adjusting the humidity of the hypoxic gas; controlling the oxygen content in the air tight enclosure to be lower than a first oxygen content range, wherein the first oxygen content range is 0-3%, preferably 0-1%, more preferably 0-0.5%; controlling the humidity in the airtight enclosure within a first humidity range of 15% -45% RH, preferably 15% -25% RH; and maintaining the environment within the airtight enclosure for a predetermined time.
The low-oxygen air-conditioning auxiliary humidity control air-conditioning insect killing technology improves the insect killing efficiency, shortens the insect killing period and saves the energy consumption.
Drawings
Preferred embodiments of the present invention will now be described in further detail with reference to the accompanying drawings, in which:
fig. 1 is a schematic view of the internal structure of a low-oxygen humidity-controlled-atmosphere insecticidal system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following detailed description, reference is made to the accompanying drawings that form a part hereof and in which is shown by way of illustration specific embodiments of the application. In the drawings, like numerals describe substantially similar components throughout the different views. Various specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to practice the teachings of the present application. It is to be understood that other embodiments may be utilized and structural and logical changes may be made to the embodiments of the present application.
The low-oxygen modified atmosphere insecticidal technology is an effective insecticidal method for enabling insects to die due to dehydration and asphyxiation caused by oxygen deficiency by creating a low-oxygen environment. Research shows that the air valve of the worm is forced to open and keep open in the low-oxygen environment, and the water in the worm is lost at a high speed under the unnatural condition, which is 7-10 times higher than that when the air valve is closed. The low-oxygen modified atmosphere insecticidal method of the traditional Chinese medicinal materials just reduces the oxygen content in the storage environment of the traditional Chinese medicinal materials, stimulates the worms to breathe, prolongs the opening time of the air valve of the worms, and causes the worms to be dehydrated and killed. The low-oxygen controlled atmosphere insecticidal method is a safe, environment-friendly, pollution-free, residue-free and damage-free insecticidal method; in addition, the low-oxygen modified atmosphere insecticidal method can achieve the aims of insect killing and mildew prevention, control moisture and keep the original quality of medicinal materials. Therefore, the low-oxygen modified atmosphere insecticidal method is a safe, green and environment-friendly insecticidal method.
As discovered by the inventors of the present application, for larvae or adults, if the ambient humidity is appropriately reduced, for example, the relative humidity of the environment is maintained at 20% to 40% RH, the water evaporation is facilitated, and the death of the larvae or adults can be promoted. The method of the invention can effectively improve the insecticidal efficiency, reduce the insecticidal time and reduce the insecticidal cost.
The insecticidal composition is safe and green, except killing pests, inhibiting the physiological activity of the pests, slowing the growth of the pests, and not damaging the quality of the articles to be treated (such as traditional Chinese medicinal materials, Tibetan products and the like).
The first oxygen content range and the first humidity range referred to herein are the optimum insecticidal parameters obtained in practice with respect to the combination of oxygen concentration and humidity. For example, the oxygen concentration range and the humidity range are adjusted, the oxygen concentration range with the better insecticidal effect is the first oxygen content range, and the humidity range is the first humidity range.
The first oxygen threshold value refers to a value close to but higher than the first oxygen content range, namely the first oxygen threshold value, in the process of killing insects by using the controlled atmosphere insecticidal system, the low oxygen content gas is firstly introduced, so that the total oxygen content in the airtight enclosure reaches. When the first oxygen threshold is reached, further humidified hypoxic gas can be introduced into the gas-tight enclosure. The second oxygen threshold and the third oxygen threshold as used herein refer to the two extremes of the first oxygen content range, i.e., the minimum and maximum; wherein the second oxygen threshold is its minimum and the third oxygen threshold is its maximum. Practice proves that by adopting the oxygen content and humidity control method, the air conditioning efficiency can be improved, and the time required by air conditioning can be reduced.
The first humidity threshold and the second humidity threshold as referred to herein refer to the extremes, i.e., the minimum and maximum, of the first humidity range. Wherein the first humidity threshold is its minimum and the second humidity threshold is its maximum.
Fig. 1 is a schematic diagram illustrating an internal structure of a low-oxygen humidity-controlled insecticidal system according to an embodiment of the present invention, wherein the low-oxygen humidity-controlled insecticidal system includes a nitrogen gas supply device 100, a control device 200, and a regulating device 300. The nitrogen gas supply device 100 supplies nitrogen gas to the airtight enclosure 400. The adjusting device 300 receives the gas transmitted by the nitrogen gas supplying device 100, adjusts the humidity and other parameters of the gas, and provides the gas to the airtight enclosure 400. The control device 200 can further control the parameters of the gas inside the airtight enclosure 400 by controlling the nitrogen gas supply device 100 and the adjusting device 300.
According to one embodiment of the present application, the system of the present application has a range of insecticidal parameters that is most suitable. Such as a first oxygen content range, a first humidity range, etc. In some embodiments, the above parameters, when combined to kill pests, have the best combination range.
In the present invention, the nitrogen gas supply device 100 delivers a gas containing oxygen gas in a specific concentration range to the regulator 300. The adjusting device 300 detects specific components in the received gas, such as oxygen content and humidity, further adjusts and controls parameters of the gas, such as temperature and humidity, according to the indication of the control device 200, and transmits the gas to the airtight enclosure 400, so that the oxygen content, carbon dioxide content, humidity, and the like in the airtight enclosure 400 are controlled within a set range.
The nitrogen gas supply apparatus 100 includes an oxygen control assembly 101 and an oxygen reduction assembly 102. As the source gas flows through the oxygen reduction assembly 102, the oxygen reduction assembly 102 reduces the oxygen content therein to form nitrogen gas. According to one embodiment of the present application, the source gas may be air. According to one embodiment of the present application, the oxygen in the nitrogen gas is no more than 5% by volume. According to a preferred embodiment of the present application, the nitrogen gas contains no more than 1% by volume of oxygen. According to an embodiment of the present application, the source gas may also be separated nitrogen, a mixed gas of nitrogen and carbon dioxide, or the like. According to one embodiment of the present application, the oxygen reduction assembly 102 provides a low oxygen content gas to the gas tight enclosure 400. According to one embodiment of the present application, the source gas is delivered to the oxygen reduction assembly 102, and the oxygen reduction assembly 102 further partially or completely removes oxygen mixed in with the source gas flowing therethrough to provide nitrogen to the outside, for example, to provide nitrogen to the gas-tight enclosure. According to an embodiment of the present application, when the source gas is nitrogen, the nitrogen may be directly supplied to the outside without flowing through the oxygen reduction assembly 102, for example, the nitrogen may be supplied to the airtight enclosure.
The oxygen control assembly 101 can regulate the oxygen reduction assembly 102, and control the oxygen reduction assembly 102 to output nitrogen containing oxygen in a certain proportion range. For example, the oxygen control assembly 101 sets the oxygen content below 3% and sends the set value to the oxygen reduction assembly 102. The oxygen reduction assembly 102 receives a setting for nitrogen-oxygen separation of a source gas flowing therethrough and outputs nitrogen gas having an oxygen content of no more than 2% by volume. It will be understood by those skilled in the art that when the source gas is air or nitrogen, the nitrogen gas mainly comprises nitrogen.
According to an embodiment of the present application, the control device 200 further comprises a display component 201 and a control component 202. The control component 202 regulates and controls different gas concentrations, humidity and the like in the airtight enclosure 400 through set parameters, and displays the set parameters on the display component.
According to an embodiment of the present application, the display module 201 can display various gas composition concentration ranges, gas humidity, and other parameters set by the control module 202, so that the staff member can understand and further set the parameters required by the airtight enclosure 400. According to an embodiment of the present application, the display component 201 can display parameters of the airtight enclosure, such as the type of gas and the composition ratio of each gas, the humidity inside the airtight enclosure, etc., sent by the detection apparatus 500. According to an embodiment of the present application, the worker can compare the parameters set in the airtight enclosure with the real-time parameters in the airtight enclosure in real time by means of the display module 201, so as to adjust the parameters in time, thereby improving the insecticidal efficiency and maintaining the articles to be insecticidal.
According to one embodiment of the present application, a set point, i.e., a set parameter, may be set at the control component 202. In some embodiments, the control module 202 is connected to the nitrogen gas supply device 100, the adjustment device 300, the detection device 500, and the like, and sets set values for different devices, respectively, and sends the set values as instructions to the devices. In some embodiments, the control assembly 202 sends instructions to the nitrogen gas supply 100 to prepare a hypoxic gas with a specific oxygen concentration, and further sends the hypoxic gas to the regulating device 300. In some embodiments, the control assembly 202 sends instructions to the conditioning device 300 to configure the gas with a corresponding humidity, temperature, and further send the configured gas to the airtight enclosure. In some embodiments, the control component 202 receives the parameters within the airtight enclosure sent by the detection apparatus 500 and compares the set points within the airtight enclosure to the real-time parameters within the airtight enclosure. In some embodiments, the set point includes, but is not limited to, humidity, oxygen content, low oxygen gas flow rate.
According to one embodiment of the present application, the control assembly 202 detects whether the gas concentration, flow rate, etc. received by the regulating device 300 meets a set value based on the set value. When the received gas does not meet the set value, for example, according to one embodiment of the present application, when the oxygen content is high, the control component 202 sends a command to the nitrogen gas supply device 100 to prepare a gas with a lower oxygen content, thereby reducing the oxygen content to meet the set value.
The conditioning apparatus 300 further includes a humidity control assembly 301. The adjusting device 300 receives the gas transmitted by the nitrogen gas supply device 100, and the humidity control assembly 301 further controls the humidity of the received gas. In some embodiments, the humidity control assembly 301 is disposed inside the airtight enclosure to directly control the humidity of the gas inside the airtight enclosure.
In some embodiments, water is included in moisture control assembly 301 and may further evaporate the water into water vapor. Further, the humidity control component 301 regulates and controls the humidity of the received gas according to the instruction of the control device 200. Finally, the regulating device 300 delivers the regulated gas to the airtight enclosure 400. According to an embodiment of the present application, the adjustment device 300 may further adjust the flow rate of the gas delivered by the receiving nitrogen gas supply device 100.
According to one embodiment of the application, the low-oxygen controlled-atmosphere insecticidal system further comprises a carbon dioxide gas source. The carbon dioxide gas source is used to provide carbon dioxide with a specific concentration, and is connected to the control device 200 and the adjusting device 300 in a manner similar to that of the nitrogen gas supply device 100, and the control method thereof will not be described herein. According to one embodiment of the application, the carbon dioxide gas source may be one or more of a carbon dioxide producing assembly, a carbon dioxide cylinder, dry ice. According to one embodiment of the present application, a carbon dioxide gas source delivers carbon dioxide gas to a flow control assembly that detects and controls the amount of carbon dioxide in the gas delivered to the regulating device. The auxiliary addition of carbon dioxide on the basis of the original low-oxygen gas can promote the breathing of pests, accelerate the evaporation of water of the pests and improve the pest killing speed. Meanwhile, the insecticidal efficiency can be improved, and the problems of low oxygen content concentration, high requirement on system air tightness, relatively long insecticidal time and the like in simple hypoxia insecticidal are solved.
According to an embodiment of the present application, the hypoxic controlled atmosphere insecticidal system of the present application further comprises a detection device 500, and the detection device 500 detects parameters such as concentration, humidity and temperature of each component gas and transmits the detection result to the control device 200. According to an embodiment of the present application, the control device 200 receives the real-time parameters transmitted by the detecting device 500 inside the airtight enclosure, compares the real-time parameters with the set parameters, and further regulates and controls the parameters by regulating and controlling the nitrogen gas supply device 100 and the adjusting device 300.
According to one embodiment of the present application, the detection device 500 includes an oxygen content detector, a humidity measurement component.
According to one embodiment of the present application, the oxygen content detector may detect the oxygen content in the nitrogen gas supply device 100, the regulating device 300, and the airtight enclosure 400, and transmit the oxygen content everywhere to the control device. The control device receives the oxygen content data of each part, compares the oxygen content data with the first oxygen content range, and when the oxygen content in a certain device is too high, for example, the oxygen content in the airtight enclosure 400 is higher than a fourth oxygen threshold, nitrogen is continuously introduced into the device to reduce the oxygen content in the device so as to achieve the optimal insecticidal concentration.
According to an embodiment of the present application, the humidity measuring assembly may measure the humidity of the gas inside the conditioning apparatus 300 and the airtight enclosure 400 and transmit the humidity parameter to the control apparatus 200. In some embodiments, the control device 200 receives the humidity parameter for each device and compares it to a first humidity range. For example, when the measured humidity value inside the airtight enclosure 400 is below the first humidity threshold or above the second humidity threshold, the humidity will be further adjusted by the humidity control device 301 such that the humidity is within the first humidity range. In some embodiments, when the humidity of the gas in the adjusting device 300 is not within the first humidity range, the control device 200 transmits an instruction to adjust the humidity therein to be within the first humidity range.
The airtight enclosure 400 includes airtight enclosures such as airtight cabinets, airtight warehouses, airtight bags, airtight nets, and the like. According to one embodiment of the present application, the airtight bag and the airtight tent may be made of flexible materials. According to one embodiment of the application, the airtight cabinet may be a vacuum airtight cabinet. In some embodiments, the air exchange rate of the air tight enclosure 400 is less than 0.05d-1And, further, the ventilation rate is not more than 0.02d-1。
According to an embodiment of the present invention, a humidity control device is disposed inside the airtight enclosure 400 and connected to the control device 200, so that the humidity of the airtight enclosure can be adjusted from the inside of the airtight structure according to the instruction of the control device.
The storage environment and the insecticidal condition required by different traditional Chinese medicinal materials are different, and the gas with different parameters is configured according to the types of the medicinal materials stored in the airtight enclosure 400, so that the gas components in the airtight enclosure have the most effective insecticidal proportion. According to an embodiment of the present application, the detecting and controlling module 303 is configured to set the concentration range of the gas composition, the humidity of the gas, and other parameters, i.e. the set values, according to the type and the specification of the airtight enclosure 400 and the difference of the medicinal materials inside the airtight enclosure 400, and the adjusting device 300 can automatically receive the gas transmitted by the nitrogen supplying device 100 and the carbon dioxide supplying device according to the set values so as to adjust the gas composition inside the airtight enclosure 400. For example, a set of settings may be 1% oxygen concentration, 5% carbon dioxide concentration, 50% humidity; or another set of settings may be 0.1% oxygen concentration, 30% humidity, etc. Setting different set values aiming at different types, quantities, airtight enclosures, external environments and the like of medicinal materials needing to be killed, wherein all attributes of each set value are mutually independent, namely the set carbon dioxide concentration value and the set humidity are not influenced by the set oxygen concentration value.
According to one embodiment of the application, when the low-oxygen humidity-controlled atmosphere insecticidal system is used for killing insects, the steps comprise:
1) and (5) testing the sealing performance. The airtightness test is firstly carried out on the airtight enclosure for storing articles, if the airtightness is poor, the airtight enclosure needs to be sealed until the airtightness meets the requirement, so that a good insecticidal effect is ensured. Then putting the object to be killed into the airtight enclosure, and carrying out airtight treatment on the airtight enclosure.
2) And (5) warehousing the medicinal materials. Namely, the goods to be killed are put into the airtight enclosure. In some embodiments, the items to be killed are packaged with a breathable material, such as PP bags, cartons, and the like. In other embodiments, a gap is left between the objects to be killed, for example, a gap is left between the medicinal material trays to be killed. In some embodiments, the gap is 100-150 mm.
3) And (4) oxygen reduction and replacement. Namely, the low-oxygen content gas is introduced into the airtight enclosure to replace the original gas in the airtight enclosure, the oxygen content in the airtight enclosure is properly reduced, and the oxygen in the airtight enclosure is controlled within a first oxygen content range. In some embodiments, the first oxygen content is 0-3%; further, the first oxygen content is 0-2%, or 0-0.5%.
4) And (5) controlling the humidity. And filling low-oxygen gas such as nitrogen with proper humidity into the airtight enclosure, or starting a humidity control device in the airtight space to control the humidity in the airtight enclosure within a first humidity range. In some embodiments, the first humidity range is 15% -45% RH. Further, the first humidity range is 15% -25% RH.
a. And if the humidity in the airtight enclosure is higher than the set value, carrying out dehumidification treatment on the airtight enclosure. In some embodiments, dry nitrogen may be passed into the air-tight enclosure or the relative humidity within the air-tight enclosure may be reduced by other dehumidification devices and maintained at a steady level.
b. And if the humidity in the airtight enclosure is lower than the set value, humidifying the airtight enclosure. In some embodiments, the air-tight enclosure may be filled with humidified nitrogen or the relative humidity inside the air-tight enclosure may be increased by a humidifying device and maintained at a steady level.
5) And (4) auxiliary gas regulation. In some embodiments, auxiliary gas such as carbon dioxide is introduced into the airtight enclosure, and the content of the auxiliary gas is controlled within a set range, so that the insecticidal efficiency is improved.
6) And detecting the oxygen content and the humidity. In order to ensure the stability of the oxygen content and the humidity in the airtight enclosure, the oxygen content and the humidity in the airtight enclosure need to be detected. For example, when the oxygen content is higher than the set value, the oxygen reduction replacement needs to be carried out again until the oxygen content in the space is reduced to meet the set value. In some embodiments, the oxygen content, the relative humidity and the like in the airtight enclosure are monitored in real time or at regular time through the detection device, and the oxygen content, the relative humidity and the like in the airtight enclosure are regulated and controlled in real time or at regular time through the adjusting device, so that the oxygen content in the airtight enclosure and the relative humidity in the first oxygen range and the first humidity range in the traditional Chinese medicine insect killing process are ensured.
7) And (5) carrying out insecticidal treatment. According to the volume, the structural form, the placing condition, the pest category and the like of the object to be treated, the preset insecticidal time is set, and the stability of various parameters of the airtight enclosure in the preset insecticidal time is maintained.
8) And (5) taking the medicinal materials out of the warehouse. After the killing of the insects is finished, the articles can be directly taken out and put in other articles for a new round of low-oxygen killing of the insects. Of course, the article can be directly stored in the airtight enclosure in the low oxygen state, which is beneficial to stably maintaining the characteristics of the article, and preventing the article from being damaged by worms, mildewed or other chemical changes and the like. It will be understood by those skilled in the art that the pesticidal procedure described herein is not absolute.
Depending on the state of the air-tight enclosure itself and the knowledge of the insecticidal process, steps 1, 5 and 6 may be omitted as appropriate. In some embodiments, the humidity of the gas inside the gas-tight enclosure may also be adjusted while reducing the oxygen content inside the enclosure. That is, the above step 3 and step 4 are combined. In some embodiments, step 5 may precede step 3 or step 4, or may occur simultaneously with step 3 or step 4.
According to an embodiment of the application, in the insecticidal process, the detection device 500, the oxygen detector and the humidity measurement component detect corresponding parameters in the airtight enclosure and other devices in real time, and when the parameters deviate from a set value, the control device further adjusts the low-oxygen device, the humidity control component and other devices to adjust the parameters in the airtight enclosure.
According to an embodiment of the application, when the air-conditioning insecticidal system provided by the application is used for killing insects, the oxygen content in the airtight enclosure can be reduced firstly, and then the humidity of the gas in the airtight enclosure is further adjusted, wherein the steps comprise:
1) and (4) oxygen reduction and replacement. Namely, the low oxygen content gas is introduced into the airtight enclosure to discharge the original gas in the airtight enclosure and properly reduce the oxygen content in the airtight enclosure.
2) And (5) humidity adjustment. Detecting the oxygen content in the airtight enclosure, and providing the humidity-regulated hypoxic gas into the airtight enclosure or starting a humidity control device in the airtight space when the oxygen content is lower than a first oxygen threshold value.
Wherein, the first oxygen threshold is a certain set threshold which is higher than or equal to the third oxygen threshold.
According to an embodiment of the application, the first oxygen threshold is about 5 times the oxygen content of the third oxygen threshold, e.g. about 2.5% when the third oxygen threshold is 0.5%.
According to an embodiment of the application, the first oxygen threshold is about 2 times the oxygen content of the third oxygen content, e.g. about 2% when the third oxygen threshold is 1%.
According to one embodiment of the application, the combined parameters used in the pesticidal process, i.e. the first oxygen content range and the first humidity range, may influence each other. That is, when the oxygen content is increased, it is possible to achieve a similar insecticidal effect by adjusting the humidity.
The method of low-oxygen humidity-controlled atmosphere disinsection of the present application will be described below by way of examples.
Example 1
And (3) testing pests: tobacco beetle and red pseudocorn beetle.
The test method comprises the following steps:
firstly, dividing the test pests into 4 equal parts and respectively placing the 4 equal parts into 4 airtight enclosures with the same volume and humidity control function.
And (3) starting a nitrogen supply device, and respectively reducing and maintaining the oxygen content in the 4 airtight enclosures at different concentrations: pool No. 1, about 1%; bank No. 2, about 2%; bank No. 3, about 3%; pool No. 4, 21%. During the oxygen reduction process, it can be observed that the pests in the test drug material crawl outward from the stack, and the activity of the pests is observed and recorded.
Meanwhile, the humidity in the 4 airtight enclosures is controlled to be 20% +/-5% RH.
The experimental results are as follows: about 1.5 days for all pests in the storehouse No. 1 to lose activity; about 2 days for all pests in the storehouse No. 2 to lose activity; about 7 days for all pests in the storehouse No. 3 to lose activity; all pests in bank 4 remained active all the time.
The experiment result shows that the relative humidity and other parameters are fixed, the lower the oxygen content is, the higher the air-conditioning insecticidal efficiency is, and the shorter the insecticidal time is. The lower the oxygen concentration is, the higher the oxygen reduction frequency is, and the medicinal material preservation cost is correspondingly increased. According to one embodiment of the present application, the oxygen concentration is maintained at about 2%.
Example 2
And (3) testing pests: tobacco beetle and red pseudocorn beetle.
The test method comprises the following steps:
firstly, dividing the test pests into 4 equal parts and respectively placing the 4 equal parts into 4 airtight enclosures with the same volume and humidity control function.
Opening the nitrogen supply device to reduce and maintain the oxygen content in the airtight enclosure to about 2%; during the oxygen reduction process, it can be observed that the pests in the test drug material crawl outward from the stack, and the activity of the pests is observed and recorded.
Simultaneously, carry out different humidity control to 4 airtight enclosures: library No. 1, (20 ± 5)% RH; library No. 2, (40 ± 5)% RH; library No. 3, (60 ± 5)% RH; bank 4, (80. + -. 5)% RH.
The experimental results are as follows: about 2 days for all pests in the storehouse No. 1 to lose activity; about 5 days for all pests in the storehouse No. 2 to lose activity; about 7 days for all pests in the storehouse No. 3 to lose activity; about 10 days were spent for inactivation of all pests in bank 4.
According to the experiment of this example, the oxygen concentration was maintained constant, the humidity was further reduced, for example to 10% RH or even lower, and the time of inactivation of the pests was recorded. Experiments show that the insecticidal time and efficiency after further humidity reduction does not change significantly compared to the humidity of 20% + -5% RH.
Experimental results show that the relative humidity is an important influence factor in the process of the air-conditioned disinsection of the traditional Chinese medicinal materials, and when the relative humidity in the air is 20 +/-5%, the air-conditioned disinsection effect is obvious. The method is an effective method for accelerating the rate of the controlled-atmosphere disinsection of the traditional Chinese medicinal materials by reducing and maintaining the humidity constant. Aiming at different Chinese medicinal material varieties and different pest species in the Chinese medicinal materials, the insecticidal time and cost can be saved by properly adjusting the oxygen content in the airtight enclosure and the relative humidity of the storehouse.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention, and therefore, all equivalent technical solutions should fall within the scope of the present invention.
Claims (11)
1. A modified atmosphere insecticidal system comprising:
carrying out airtight enclosure;
a nitrogen gas supply configured to provide nitrogen gas;
a conditioning device configured to provide gas from the nitrogen gas supply device to the gas-tight enclosure and to condition a humidity of the gas from the nitrogen gas supply device; and
a control device configured to control an oxygen content within the airtight enclosure to be below a first oxygen content range, control a humidity within the airtight enclosure to be within a first humidity range.
2. A modified atmosphere insecticidal system according to claim 1, wherein the first oxygen content is in the range of 0-3%, preferably 0-2%, more preferably 0-0.5%.
3. A modified atmosphere insecticidal system according to claim 1, wherein the first humidity range is 15% to 45% RH, preferably 15% to 25% RH.
4. The modified atmosphere insecticidal system of claim 1, wherein the first oxygen content is in the range of 0-0.5% and the first humidity is in the range of 15% -45% RH.
5. The modified atmosphere insecticidal system of claim 1, wherein the first oxygen content range is 0% -2% and the first humidity range is 15% -25% RH.
6. The modified atmosphere insecticidal system of claim 1, wherein the insects to be killed in the airtight enclosure are tobacco beetle and tribolium castaneum.
7. The modified atmosphere insecticidal system of claim 1, further comprising an oxygen content detector, wherein the control device is configured to provide a low oxygen gas to the airtight enclosure in response to the oxygen content within the airtight enclosure being above the first oxygen range.
8. The modified atmosphere insecticidal system of claim 1, the conditioning device further comprising: a humidity control assembly configured to provide a humidity conditioned gas into the airtight enclosure or to condition the humidity of an existing gas within the airtight enclosure.
9. The modified atmosphere insecticidal system of claim 1, further comprising a humidity measurement assembly, wherein the control device is configured to provide the humidity-modified hypoxic gas into the airtight enclosure in response to the humidity within the airtight enclosure exceeding a first humidity range.
10. The modified atmosphere insecticidal system of claim 1, wherein the airtight enclosure is a sealed bag, or an airtight cabinet, or an airtight warehouse.
11. A combined air-conditioning insecticidal method comprises
Providing a hypoxic gas into the gas-tight enclosure;
adjusting the humidity of the hypoxic gas;
controlling the oxygen content in the air tight enclosure to be lower than a first oxygen content range, wherein the first oxygen content range is 0-3%, preferably 0-1%, more preferably 0-0.5%;
controlling the humidity in the airtight enclosure within a first humidity range of 15% -45% RH, preferably 15% -25% RH; and
the environment within the airtight enclosure is maintained for a predetermined time.
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| CN115669991A (en) * | 2022-10-27 | 2023-02-03 | 天津森罗科技股份有限公司 | Tobacco air-conditioning maintenance system |
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