Hermetia illucens cultivation environmental control system and method thereof

Abstract

The invention relates to a hermetia illucens breeding environment control system and method. The breeding material tray stack is carried into the breeding space through the conveying channel, the fresh air mechanism and the negative pressure fan are started, the fresh air mechanism and the negative pressure fan are arranged on the two opposite side walls of the breeding bin respectively, airflow is promoted to flow to the negative pressure fan from the fresh air mechanism, and the exhaust efficiency of waste gas in the breeding space is improved. According to the system, through the synergistic effect of the fresh air mechanism and the negative pressure fan, directional stable airflow is formed in the breeding space. Due to the unique arrangement mode of the transportation channel, the convenience of the breeding operation is ensured, and the interference of the transportation operation on the stability of the breeding environment is avoided; meanwhile, the physical distance between the fresh air mechanism and the breeding space is guaranteed, on one hand, a diffusion space is provided for uniform diffusion of fresh air, the fresh air is prevented from being concentrated in the opening direction of the air outlet of the fresh air mechanism, and on the other hand, the influence of noise of the fresh air mechanism on the breeding space is reduced.

Description

Technical Field

[0001] The present application relates to the field of aquaculture technology, and in particular to a black soldier fly aquaculture environmental control system and method thereof. Background Art

[0002] With the rapid development of factory-based insect farming technology, existing environmental control systems generally face technical bottlenecks such as low environmental control efficiency. Most existing breeding facilities adopt an open ventilation design, which makes it difficult to accurately control temperature and humidity parameters, especially under high-density breeding conditions, which can easily lead to uneven development of larvae. Conventional parallel-flow ventilation systems have airflow dead corners, which cause harmful gases such as ammonia and carbon dioxide to gather in local areas, affecting the feeding efficiency and conversion rate of black soldier flies. At the same time, the overlapping design of material transportation channels and breeding areas not only interferes with environmental stability, but also increases the risk of pathogen transmission.

[0003] For example, patent CN109937970A records an air supply system for factory-based high-density farming, which realizes air flow in the farming space by connecting the left and right air ducts to the wind-cutting fan; patent CN113261540B records an air environment control system for top-to-bottom air supply in the farming room, which takes in air from the top of the farming room and exhausts air from the bottom of the farming room. None of the above patents solve the contradiction between transportation operations and environmental control, and all have the problem of poor exhaust efficiency of farming waste gas in the farming space due to unreasonable equipment layout. Summary of the invention

[0004] Based on this, it is necessary to provide a black soldier fly breeding environmental control system and method with a more reasonable spatial layout, which is conducive to transportation, environmental control and exhaust gas discharge, in order to address the above problems.

[0005] A black soldier fly breeding environmental control system comprises a breeding warehouse, a fresh air mechanism and a negative pressure fan, wherein a breeding space is formed in the breeding warehouse; the fresh air mechanism is arranged on the breeding warehouse and located on one side of the breeding space, the fresh air mechanism and the breeding space are arranged at intervals, and the interval between the fresh air mechanism and the breeding space forms a transportation channel; the negative pressure fan is arranged on the breeding warehouse and located on a side of the breeding space facing away from the transportation channel, and the negative pressure fan and the fresh air mechanism are used to form an airflow in the breeding space from the fresh air mechanism to the negative pressure fan.

[0006] In one embodiment, the fresh air mechanism includes a fresh air fan and an air equalizing member, the fresh air fan is arranged on the breeding barn, the air equalizing member is arranged at the air outlet of the fresh air fan, a plurality of evenly arranged air equalizing channels are formed in the air equalizing member, and the area of ​​the breeding space facing the air equalizing member is greater than or equal to the cross-sectional size of the breeding space.

[0007] In one embodiment, the black soldier fly breeding environmental control system also includes a wind wall, which includes an air induced passage and a plurality of disturbance fans. The air induced passage is arranged on the side wall of the breeding space. An air induced port is formed at one end of the air induced passage. The air induced port faces the transport passage and is connected to the transport passage. The plurality of disturbance fans are installed on the side of the air induced passage facing the breeding space.

[0008] In one of the embodiments, the breeding space is divided into at least three layers in the vertical direction, and each layer of the breeding space is divided into at least three independent temperature control areas along the direction from the fresh air mechanism to the negative pressure fan, and each of the independent temperature control areas is correspondingly provided with an environmental monitoring sensor, and the disturbance fan is electrically connected to the environmental monitoring sensor, and the disturbance fan corresponding to each independent temperature control area is controlled to operate according to the detection result of the environmental monitoring sensor in the area.

[0009] In one embodiment, the wind walls are arranged on the opposite side walls of the breeding space, and the disturbance fans of each wind wall are arranged in two rows in an alternating manner, and the disturbance fans of the two opposite wind walls are arranged in an alternating manner, and the horizontal offset of the disturbance fans is 0.3-0.5 times the diameter of the disturbance fans.

[0010] In one of the embodiments, a rotatable guide plate is provided in the air duct, and the rotation axis direction of the guide plate is toward the breeding space.

[0011] In one embodiment, at least two breeding spaces are formed in the breeding warehouse, and the side of each breeding space facing the fresh air mechanism is connected to the transport channel. Each breeding space is correspondingly provided with at least one fresh air fan and at least one negative pressure fan. A wind partition is provided between two adjacent breeding spaces, and the wind partition can be moved into the transport channel to separate the two adjacent breeding spaces.

[0012] In one of the embodiments, an air outlet is provided on the side wall of the breeding warehouse opposite to the fresh air mechanism, and an air collecting nozzle is connected to the side of the air outlet facing away from the breeding space, and the negative pressure fan is installed on the side of the air collecting nozzle facing away from the air outlet, and the cross-sectional size of the air collecting nozzle tends to decrease from the air outlet to the negative pressure fan.

[0013] In one embodiment, the black soldier fly breeding environmental control system also includes a control air valve, a return air duct and a deodorization system. The air outlet end of the negative pressure fan, the return air duct and the deodorization system are respectively connected to three interfaces of the control air valve. The control air valve is used to control the air volume of the negative pressure fan entering the return air duct and the deodorization system. The other end of the return air duct is connected to the air equalizing member.

[0014] The above-mentioned black soldier fly breeding environmental control system transports the breeding material trays to the breeding space through the transportation channel, and starts the fresh air mechanism and the negative pressure fan. Since the fresh air mechanism and the negative pressure fan are respectively arranged on the opposite side walls of the breeding warehouse, the fresh air mechanism is used to provide fresh air to the breeding space in the direction of the negative pressure fan, and the negative pressure fan is used to form a negative pressure on the other side of the breeding space to promote the airflow from the fresh air mechanism to the negative pressure fan, thereby improving the efficiency of exhaust gas discharge in the breeding space. The above-mentioned black soldier fly breeding environmental control system forms a directional and stable airflow in the breeding space through the synergistic effect of the fresh air mechanism and the negative pressure fan. The unique transportation channel layout ensures the convenience of breeding operations and avoids the interference of transportation operations on the stability of the breeding environment; at the same time, it ensures the physical distance between the fresh air mechanism and the breeding space. On the one hand, it provides diffusion space for the uniform diffusion of fresh air, avoids the concentration of fresh air in the direction of the outlet opening of the fresh air mechanism, and on the other hand, it reduces the impact of the noise of the fresh air mechanism on the breeding space.

[0015] A method for controlling the environment of black soldier flies during breeding, comprising:

[0016] Step S1: obtaining current breeding environment parameters and insect physiological parameters of the breeding space, and constructing an initial environmental prediction model of the breeding space according to the current breeding environment parameters and the insect physiological parameters;

[0017] Step S2: predicting the change of the breeding environment according to the initial environment prediction model;

[0018] Step S3: Calculate the difference between the aquaculture environment change amount and a preset threshold value to obtain an environmental deviation amount;

[0019] Step S4: determining the target start / stop quantity and target position of the disturbance fan of the wind wall based on the amplitude range of the environmental deviation, and generating a variable frequency control signal of the fresh air fan according to the change gradient of the environmental deviation;

[0020] Step S5: In response to the target start-stop quantity and target position, the disturbance fans of corresponding quantity and position in the wind wall are controlled to start and run, and the motor speed of the fresh air fan and the output power of the refrigeration unit are adjusted according to the variable frequency control signal to control the flow rate and temperature of the fresh air delivered to the breeding space.

[0021] The above-mentioned environmental control method for black soldier fly breeding predicts temperature changes through insect body parameters and environmental parameters, and reduces the error rate of predicted temperature changes. The operation of the wind wall and the fresh air fan is regulated by the prediction results to avoid temperature overshoot or lag caused by traditional threshold control, and maintain the optimal growth temperature zone of the insect body; and local air flow optimization is achieved by controlling the directional disturbance of the wind wall, and the synergistic effect of global temperature and humidity regulation is achieved through the fresh air mechanism, solving the problem of uneven temperature field caused by traditional single ventilation.

[0022] In one embodiment, the step S3 further includes:

[0023] Based on the amplitude range of the environmental deviation, generating a return air proportional valve adjustment parameter;

[0024] Adjust the opening of the return air duct according to the return air proportional valve adjustment parameters.

[0025] In one embodiment, the step S1 comprises:

[0026] Acquire physiological parameters of insects in the breeding space, and establish an insect heat production model that characterizes the insect metabolic heat production rate based on the insect physiological parameters. The insect heat production model is: Q gen =N·f(a)·g(T); where N is the number of insects; f(a) is the heat production coefficient of insect age; g(T) is the function of the effect of temperature on activity;

[0027] The current breeding environment parameters of the breeding space are obtained, and a system heat dissipation model characterizing the heat exchange characteristics of the breeding system is established based on the current environmental temperature. The system heat dissipation model is:

[0028] Q loss =hA(T-T env )+ηV; where h is the comprehensive heat dissipation coefficient (W / (m 2 ·℃), A is the effective heat dissipation area (m 2 ), T env is the current ambient temperature (°C), T is the current temperature of the insect body (°C), η is the ventilation and heat dissipation efficiency (W / m 3 ), V is the ventilation volume (m 3 / s);

[0029] The insect body heat generation model is coupled with the system heat dissipation model to construct an initial environment prediction model for the breeding space. The initial environment prediction model is:

[0030] Among them, Δt is the time step, and C is the total heat capacity of the aquaculture system (J / ℃).

[0031] In one embodiment, the step S2 comprises:

[0032] Acquire environmental monitoring data and insect growth data in historical breeding cycles, use a neural network to optimize parameters of the initial environmental prediction model, and generate an optimized breeding environment prediction model;

[0033] The aquaculture environment parameters collected in real time are input into the optimized aquaculture environment prediction model to calculate the predicted value of the environmental temperature change within a preset time window. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of various elements are drawn only as examples in the drawings and are not necessarily drawn according to the true scale.

[0037] Figure 1 The figure is a schematic diagram of the structure of a black soldier fly breeding environment control system.

[0038] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0039] Figure 3 for Figure 1 Side view of the air duct in FIG.

[0040] Figure 4 The figure is a flow chart of a method for environmental control of black soldier flies breeding in one embodiment.

[0041] Description of reference numerals:

[0042] Black soldier fly breeding environmental control system 10; breeding warehouse 100; breeding space 110; transportation channel 120; fresh air mechanism 200; fresh air fan 210; air distribution element 220; negative pressure fan 300; air collecting nozzle 310; wind baffle 400; return air duct 500; pressurized fan 510; deodorization system 600; air mixing element 700; air mixing chamber 710; wind wall 800; air induced channel 810; disturbance fan 820; air induced outlet 830. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0044] See also Figure 1 and Figure 2 The black soldier fly breeding environment control system 10 in one embodiment of the present application has a more reasonable spatial layout, which is at least conducive to transportation, environmental control and exhaust gas discharge. Specifically, the black soldier fly breeding environment control system 10 includes a breeding warehouse 100, a fresh air mechanism 200 and a negative pressure fan 300. A breeding space 110 is formed in the breeding warehouse 100; the fresh air mechanism 200 is arranged on the breeding warehouse 100 and is located on one side of the breeding space 110. The fresh air mechanism 200 and the breeding space 110 are spaced apart, and the space between the fresh air mechanism 200 and the breeding space 110 forms a transportation channel 120; the negative pressure fan 300 is arranged on the breeding warehouse 100 and is located on the side of the breeding space 110 that is opposite to the transportation channel 120. The negative pressure fan 300 and the fresh air mechanism 200 are used to form an airflow from the fresh air mechanism 200 to the negative pressure fan 300 in the breeding space 110.

[0045] The aquaculture material tray is transported to the aquaculture space 110 through the transport channel 120, and the fresh air mechanism 200 and the negative pressure fan 300 are started. Since the fresh air mechanism 200 and the negative pressure fan 300 are respectively arranged on the opposite side walls of the aquaculture bin 100, the fresh air mechanism 200 is used to provide fresh air to the aquaculture space 110 in the direction of the negative pressure fan 300, and the negative pressure fan 300 is used to form a negative pressure on the other side of the aquaculture space 110 to promote the airflow from the fresh air mechanism 200 to the negative pressure fan 300, thereby improving the efficiency of exhaust gas discharge in the aquaculture space 110. The above-mentioned black soldier fly aquaculture environmental control system 10 forms a directional and stable airflow in the aquaculture space 110 through the synergistic effect of the fresh air mechanism 200 and the negative pressure fan 300. The unique arrangement of the transport channel 120 ensures the convenience of the breeding operation and avoids the interference of the transport operation on the stability of the breeding environment; at the same time, it ensures the physical distance between the fresh air mechanism 200 and the breeding space 110. On the one hand, it provides diffusion space for the uniform diffusion of the fresh air and avoids the fresh air being concentrated in the direction of the outlet opening of the fresh air mechanism 200. On the other hand, it reduces the impact of the noise of the fresh air mechanism 200 on the breeding space 110.

[0046] In one embodiment, the fresh air mechanism 200 includes a fresh air fan 210 and an air equalizing member 220. The fresh air fan 210 is arranged on the breeding warehouse 100, and the air equalizing member 220 is arranged at the air outlet of the fresh air fan 210. A plurality of evenly arranged air equalizing channels are formed in the air equalizing member 220, and the area of ​​the breeding space 110 facing the air equalizing member 220 is greater than or equal to the cross-sectional size of the breeding space 110. For example, in this embodiment, the air equalizing member 220 is a grille plate, and the grille space on the grille plate is formed as an air equalizing channel. After the fresh air fan 210 passes through the air equalizing member 220, it is easier to blow to the breeding space 110 more evenly to avoid fresh air concentration.

[0047] In one embodiment, at least two breeding spaces 110 are formed in the breeding warehouse 100, and the side of each breeding space 110 facing the fresh air mechanism 200 is connected to the transportation channel 120. Each breeding space 110 is correspondingly provided with at least one fresh air fan 210 and at least one negative pressure fan 300. A wind partition 400 is provided between two adjacent breeding spaces 110, and the wind partition 400 can be moved into the transportation channel 120 to separate the two adjacent breeding spaces 110. The breeding tray can be transported to any breeding space 110 through the transportation channel 120, and when the black soldier flies cultured in the breeding space 110 are of different ages, or the breeding environments of the same age black soldier flies are not consistent, the wind partition 400 can be driven to separate the two adjacent breeding spaces 110. Since each breeding space 110 is correspondingly provided with a fresh air fan 210 and a negative pressure fan 300, the environment of the breeding space 110 can be regulated by the fresh air fan 210 opposite to the breeding space 110.

[0048] Specifically, a telescopic drive member (not shown) is provided between the breeding spaces 110, and the telescopic drive member is used to drive the wind baffle 400 to move toward or away from the transport channel 120. For example, the telescopic drive member can be a cylinder, and of course, it can be other drive structures such as an electric push rod.

[0049] In one embodiment, an air outlet is provided on the side wall of the breeding warehouse 100 opposite to the side where the fresh air mechanism 200 is provided, and an air collecting nozzle 310 is connected to the side of the air outlet facing away from the breeding space 110, and a negative pressure fan 300 is installed on the side of the air collecting nozzle 310 facing away from the air outlet, and the cross-sectional dimension of the air collecting nozzle 310 tends to decrease from the air outlet to the negative pressure fan 300. The provision of the air collecting nozzle 310 is more conducive to forming a negative pressure on the air outlet side of the breeding space 110, improving the power of air flow, and at the same time, the air collecting nozzle 310 allows the negative pressure fan 300 to be spaced apart from the breeding space 110, reducing the impact of the noise generated by the negative pressure fan 300 on the breeding space 110, and ensuring the stable growth of black soldier flies in the breeding space 110.

[0050] In this embodiment, the black soldier fly breeding environment control system 10 also includes a control air valve, a return air duct 500 and a deodorization system 600. The air outlet end of the negative pressure fan 300, the return air duct 500 and the deodorization system 600 are respectively connected to the three interfaces of the control air valve. The control air valve is used to control the air volume of the negative pressure fan 300 entering the return air duct 500 and the deodorization system 600, and the other end of the return air duct 500 is connected to the wind equalization member 220. By setting the return air duct 500, the exhaust air can be returned to the fresh air mechanism 200 as needed, saving the required fresh air volume and water vapor under the premise of ensuring the ventilation volume and temperature and humidity, thereby reducing the energy consumption of the equipment. The control air valve can control the return air volume, which is convenient for realizing reliable regulation of the breeding space 110 environment. Furthermore, a pressurized fan 510 is provided on the return air duct 500 to increase the wind pressure of the wind equalization member 220.

[0051] In one embodiment, the black soldier fly breeding environment control system 10 further includes an air mixing member 700, in which an air mixing chamber 710 is formed, and a plurality of negative pressure fans 300 are provided for each breeding control, and the air outlet ends of each negative pressure fan 300 are connected to the air mixing chamber 710, and a control air valve is provided on the air mixing member 700, for distributing the air flow in the air mixing chamber 710 to the return air duct 500 and the deodorization system 600. By providing the air mixing member 700 to mix the exhaust gas discharged from each breeding space 110, only one control air valve, one return air duct 500 and one deodorization system 600 are required.

[0052] See also Figure 3 In one embodiment, the black soldier fly breeding environment control system 10 further includes a wind wall 800, which includes an air induction channel 810 and a plurality of disturbance fans 820. The air induction channel 810 is arranged on the side wall of the breeding space 110, and an air induction port 830 is formed at one end of the air induction channel 810. The air induction port 830 faces the transport channel 120 and is connected to the transport channel 120. The plurality of disturbance fans 820 are installed on the side of the air induction channel 810 facing the breeding space 110. By providing the wind wall 800, interlayer disturbance airflow can be formed, so that fresh air can flow above each breeding tray, and at the same time, the problem of excessively high or low temperature and humidity in the breeding space 110 can be reduced, and the ventilation efficiency in the breeding space 110 can be improved. And because the air inlet 830 faces the transport channel 120, and the air inlet channel 810 is located on the side wall of the breeding space 110, when the disturbance fan 820 is started, the fresh air of the fresh air mechanism 200 can be guided to flow toward the side wall, reducing the possibility of the fresh air being concentrated in the middle.

[0053] Specifically, wind walls 800 are arranged on opposite side walls of the breeding space 110, and the fresh air blower 210 is arranged at a position toward the middle of the breeding space 110, or at a position close to the middle. In other embodiments, the fresh air blower 210 can also be arranged at other positions.

[0054] In one embodiment, wind walls 800 are provided on the opposite side walls of the breeding space 110, and the disturbance fans 820 of each wind wall 800 are arranged in two rows in an alternating manner, and the disturbance fans 820 of the two opposite wind walls 800 are arranged in an alternating manner. Specifically, the horizontal offset of the disturbance fan 820 is 0.3-0.5 times the diameter of the disturbance fan 820. By staggering the disturbance fans 820, the temperature stratification phenomenon in the vertical direction can be effectively eliminated, and the temperature difference between the upper and lower layers can be reduced; at the same time, the standing wave effect caused by the traditional symmetrical layout is eliminated, and the area of ​​the local eddy current region is reduced. The staggered arrangement allows the disturbance fan 820 group to form a complementary pressure field, which can further promote ventilation efficiency and increase ventilation frequency.

[0055] In one embodiment, the breeding space 110 is divided into at least three layers in the vertical direction, and each layer of the breeding space 110 is divided into at least three independent temperature control areas along the direction from the fresh air mechanism 200 to the negative pressure fan 300. Each independent temperature control area is correspondingly provided with an environmental monitoring sensor, and the disturbance fan 820 is electrically connected to the environmental monitoring sensor. The disturbance fan 820 corresponding to each independent temperature control area is controlled to operate according to the detection result of the environmental monitoring sensor in the area. Through the three-dimensional partitioned environmental monitoring of vertical stratification and horizontal segmentation, and the intelligent linkage mechanism of the disturbance fan 820 and the sensor, in one case, the differentiated environmental requirements of black soldier flies at different growth stages can be realized, and in another case, the local airflow intensity can be dynamically adjusted according to real-time environmental data, so as to reduce the temperature and humidity gradient difference of the breeding space 110, and the gradient difference of gases such as environmental oxygen, and improve the overall uniformity. In other embodiments, the independent temperature control area can be divided according to the size of the breeding space 110.

[0056] like Figure 3 As shown, specifically, a rotatable guide vane 840 is provided in the air duct 810, and the direction of the rotation axis of the guide vane 840 is in the direction of the breeding space 110. By setting the guide vane 840, the airflow can be guided to flow to the upper, middle or lower part of the breeding space 110, thereby further strengthening the airflow in the area of ​​uneven temperature and humidity. For example, in this embodiment, the guide vane 840 is provided in accordance with the stratification of the breeding space 110. If the breeding space 110 is divided into three layers, the guide vane 840 is provided in an interlayer position. In other embodiments, the guide vane 840 can also be provided in other numbers and is not limited to being provided in an interlayer position, as long as the airflow can be guided to flow more to the area of ​​uneven temperature and humidity.

[0057] In one embodiment, air vents are provided on the front and rear sides of the feed tray wall of the breeding feed tray. In combination with the arrangement of the breeding feed tray array, an interlayer air duct can be formed to guide the longitudinal flow of fresh air from the fresh air mechanism 200 to the negative pressure fan 300. In another embodiment, there are openings on the four sides of the feed tray wall of the breeding feed tray. When the disturbance fan 820 of the wind wall 800 is started, a transverse airflow can be effectively formed. Specifically, the openings on the left and right sides of the breeding feed tray are shallow, and the openings on the front and rear sides are deeper, ensuring the stable and reliable circulation of the longitudinal airflow. In yet another embodiment, a groove can be provided at the bottom of the breeding feed tray to form a longitudinal air duct and / or a transverse air duct.

[0058] In this embodiment, the disturbance fan 820 of the wind wall 800 can form interlayer disturbance airflow on the breeding tray, so that fresh air can flow to the top of each breeding tray. When deployed, the air outlet of the disturbance fan 820 can be arranged opposite to the opening of the side wall of the breeding tray.

[0059] In one embodiment, the environment monitoring sensor includes a temperature sensor, and each independent temperature control area is provided with a temperature sensor for detecting the temperature of the corresponding independent temperature control area. Specifically, the environment monitoring sensor also includes a humidity sensor, and the humidity sensor is arranged in the breeding space 110 for detecting the humidity of the environment in the breeding space 110. For example, a humidity sensor can be arranged in each independent temperature control area.

[0060] In one embodiment, the black soldier fly breeding environment control system 10 further includes a wind speed sensor, which is provided on the air outlet side of the fresh air fan 210 and the air inlet side of the negative pressure fan 300 to evaluate the ventilation condition of the breeding space 110. Specifically, a wind speed sensor can also be provided on the air outlet side of the disturbance fan 820 corresponding to each independent temperature control area to detect the working state of the disturbance fan 820.

[0061] In one embodiment, an insect body temperature sensor is also arranged in the breeding space 110. For example, the insect body temperature sensor includes a non-contact temperature sensor, such as an infrared thermal imaging sensor, which measures the surface temperature of the insect body through the infrared thermal imaging sensor to infer the metabolic heat production. In other embodiments, the insect body temperature sensor may also include a contact temperature sensor, such as a contact thermal resistor temperature sensor, which is inserted into the breeding tray to directly detect the insect body temperature.

[0062] The black soldier fly breeding environmental control system 10 collects insect body data and environmental data at key points, constructs a multi-source sensing system, thereby dynamically sensing changes in the breeding environment and dynamically regulating the environment in the breeding space 110 .

[0063] In the above description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0064] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0065] See also Figure 1 , Figure 2 and Figure 4 In one embodiment, the present application also describes a method for controlling the breeding environment of black soldier flies, which can be applied to the black soldier fly breeding environment control system 10 in any of the above embodiments. Specifically, the method for controlling the breeding environment of black soldier flies includes:

[0066] Step S1: obtaining the current breeding environment parameters and insect physiological parameters of the breeding space 110, and constructing an initial environmental prediction model of the breeding space 110 according to the current breeding environment parameters and the insect physiological parameters. For example, the current breeding environment parameters at least include the ambient temperature, and the insect physiological parameters include insect age, activity, and insect population. In other embodiments, the current breeding environment parameters may also include carbon dioxide concentration parameters, humidity parameters, etc.

[0067] Specifically, step S1 includes:

[0068] Step S11: Acquire physiological parameters of the insects in the breeding space 110, and establish an insect heat production model that characterizes the insect metabolic heat production rate based on the insect physiological parameters. The insect heat production model is: Q gen =N·f(a)·g(T); where N is the number of insects; f(a) is the heat production coefficient of insect age; g(T) is the function of the effect of temperature on activity;

[0069] In this embodiment, the insect age heat production coefficient Where a is the age of the insect, T0 is the most suitable temperature for activity, T is the current temperature of the insect body, and k1, k2, and k3 are adjustment coefficients related to the insect age. For example, in the larval stage: f(a) = 0.12·e 0.15a .

[0070] Step S12: obtaining the current aquaculture environment parameters of the aquaculture space 110, and establishing a system heat dissipation model that characterizes the heat exchange characteristics of the aquaculture system based on the current environment temperature. The system heat dissipation model is:

[0071] Q loss =hA(T-T env )+ηV; where h is the comprehensive heat dissipation coefficient (W / (m 2 ·℃), A is the effective heat dissipation area (m 2 ), T env is the current ambient temperature (°C), T is the current temperature of the insect body (°C), η is the ventilation and heat dissipation efficiency (W / m 3 ), V is the ventilation volume (m 3 / s);

[0072] Step S13: The insect body heat generation model is coupled with the system heat dissipation model to construct an initial environment prediction model of the breeding space 110. The initial environment prediction model is:

[0073] T t+1 =T t +ΔT phys ,

[0074]

[0075] Where, ΔT phys is the theoretical temperature change, T t is the ambient temperature at time t, T t+1 is the predicted ambient temperature at time t+1, Δt is the time step, and C is the total heat capacity of the aquaculture system (J / ℃).

[0076] The above modeling improves the interpretability and parameter adjustability of the model by separating the two physical processes of insect body heat generation and system heat dissipation.

[0077] Step S2: predicting the change in the breeding environment according to the initial environment prediction model.

[0078] Specifically, step S2 includes:

[0079] Step S21: Obtain environmental monitoring data and insect growth data in historical breeding cycles, use a neural network to optimize the parameters of the initial environmental prediction model, and generate an optimized breeding environment prediction model;

[0080] In this embodiment, step S211: using a neural network to determine the data-driven correction term:

[0081] f NN (T t , Q gen ,V,Weather,ΔT phys ),

[0082] Specifically, ∈ pred =f NN (T t , Q gen ,V,Weather,ΔT phys ), where ∈ true =T true ―T t+1 , the goal of the neural network is to learn ∈ true The mapping relationship between T and T generates the optimized breeding environment prediction model: t+1 =T t +ΔT phys +f NN (T t , Q gen , V, Weather, ΔT phys ), where α and β are learnable parameters, T true is the actual ambient temperature detected at time t+1. In this embodiment, the neural network uses a fully connected layer or LSTM to establish the correction term f NN .

[0083] S212: Construct a mixed loss function:

[0084]

[0085] Among them: ω1=ω2=0.1 is the penalty coefficient; is the initial heat dissipation coefficient.

[0086] Step S213: training the data-driven correction term through the historical data set. Specifically, step 1: forward propagation; step 2: back propagation; step 3: learning rate scheduling.

[0087] Step S22: Input the real-time collected aquaculture environment parameters into the optimized aquaculture environment prediction model to calculate the predicted value of the environmental temperature change within the preset time window. Dynamically correct the model parameters through machine learning to improve the accuracy of long-term prediction.

[0088] Specifically, when the initial environmental prediction model is accurate, f NN ≈0; when the environment changes suddenly, |f NN |Increase to compensate for model bias.

[0089] Step S3: Calculate the difference between the change in the breeding environment and the preset threshold to obtain the environmental deviation. Specifically, taking temperature prediction as an example, the predicted value of the environmental temperature change is predicted according to the initial environmental prediction model; calculate the difference between the predicted value of the environmental temperature change and the preset temperature threshold to obtain the temperature deviation;

[0090] Step S4: Based on the amplitude range of the environmental deviation, the target start and stop number and target position of the disturbance fan 820 of the wind wall 800 are determined, and the variable frequency control signal of the fresh air fan 210 is generated according to the change gradient of the environmental deviation. This step achieves differentiated control under different degrees of deviation by establishing a hierarchical control strategy. Specifically, based on the amplitude range of the temperature deviation, the control instructions of the wind wall 800 and the fresh air fan 210 are determined. For example, when the temperature change rate exceeds 1°C / min, the emergency cooling mode of the fresh air fan 210 is triggered.

[0091] Step S5: In response to the target start-stop quantity and target position, the disturbance fans 820 of the corresponding quantity and position in the wind wall 800 are started and operated, and the motor speed of the fresh air fan 210 and the output power of the refrigeration unit are adjusted according to the variable frequency control signal to control the flow rate and temperature of the fresh air sent to the breeding space 110. The dynamic balance of environmental parameters is achieved by linking the control of the wind wall 800 disturbance and the fresh air system.

[0092] In another embodiment, the step S3: further comprises:

[0093] Based on the amplitude range of the environmental deviation, generating a return air proportional valve adjustment parameter;

[0094] Adjust the opening of the return air duct according to the return air proportional valve adjustment parameters.

[0095] In one embodiment, as can be seen from the above, the breeding space 110 is divided into different independent temperature control areas, and each independent temperature control area can execute the above-mentioned initial environment prediction model or breeding environment prediction model. Specifically, step S4 includes:

[0096] Based on the distribution characteristics of the temperature deviation, the partition control is performed, specifically:

[0097] (1) Divide the breeding space 110 into multiple independent monitoring areas, and obtain the temperature prediction deviation of each area and the overall temperature comprehensive deviation;

[0098] (2) If the temperature prediction deviation of a single monitoring area exceeds the first threshold, the disturbance fan 820 group of the wind wall 800 corresponding to the area is activated, and the disturbance fans 820 of the other areas are kept in the off state;

[0099] (3) If the predicted temperature deviations of two adjacent monitoring areas both exceed the second threshold, the disturbance fans 820 corresponding to the adjacent areas are started synchronously, and an inter-area airflow compensation instruction is generated to adjust the fan speed difference;

[0100] (4) When the overall temperature comprehensive deviation exceeds the third threshold, the control mode is selected according to the deviation direction:

[0101] If the overall temperature deviates in a positive direction, a speed-increasing signal of the fresh air fan 210 is generated and the opening of the return air proportional valve is reduced to strengthen the introduction of the external cold source;

[0102] If the overall temperature deviates negatively, the speed of the fresh air fan 210 is reduced and the opening of the return air proportional valve is increased to suppress external air flow exchange.

[0103] Further, according to the control instruction of step S4, priority control is performed:

[0104] (1) Prioritize the start and stop operation of the disturbance fan 820 in response to temperature deviation in a single or adjacent area;

[0105] (2) When there is no regional temperature deviation, the coordinated action of the fresh air fan 210 and the return air proportional valve is dynamically adjusted based on the overall temperature comprehensive deviation, so that the mixed parameters of the fresh air flow rate and the return air temperature match the preset environmental curve.

[0106] Traditional environmental control systems lack a dynamic coupling model of metabolic heat production and ventilation and heat dissipation, and are unable to adaptively adjust the temperature and humidity gradient according to the insect age stage, resulting in increased energy consumption and significant differences in insect body specifications. The black soldier fly breeding environmental control method of the present application, by coupling the insect body heat production model with the system heat dissipation model, accurately quantifies the interaction between biological metabolism and environmental heat exchange, and reduces the error rate of predicting temperature changes. The predictive control process dynamically associates growth parameters such as insect age and number with environmental model parameters to achieve automatic adaptation of the entire cycle from the larval stage (low heat production) to the adult stage (high heat production).

[0107] By regulating the operation of the wind wall 800 and the fresh air fan 210 and the control of the return air volume through the prediction results, the temperature overshoot or lag caused by the traditional threshold control is avoided, and the optimal growth temperature zone of the insect body is maintained; and by controlling the directional disturbance of the wind wall 800, local airflow optimization is achieved, and the synergy of global temperature and humidity regulation is achieved through the fresh air mechanism 200 and the return air control, solving the problem of uneven temperature field caused by traditional single ventilation. This application constructs a closed-loop control system covering breeding preparation-environmental regulation-intelligent sorting, realizes modeling based on the metabolic heat distribution of the insect colony, and multi-region differentiated environmental control, to achieve a real-time decision-making method based on the growth status of the insect body.

[0108] At the same time, the above-mentioned black soldier fly breeding environmental control method uses historical data training of the neural network to enable the prediction model to have fault tolerance for sudden environmental changes. When the sensor is abnormal, the basic control can be maintained based on the output of the prediction model to replace the value and avoid system paralysis.

[0109] It should be understood that although Figure 4 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 4 At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0110] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0111] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A black soldier fly breeding environment control system, characterized in that: The black soldier fly breeding environment control system comprises: A breeding warehouse, wherein a breeding space is formed in the breeding warehouse; A fresh air mechanism, wherein the fresh air mechanism is arranged on the breeding warehouse and is located on one side of the breeding space, the fresh air mechanism and the breeding space are spaced apart, and the space between the fresh air mechanism and the breeding space forms a transport channel; and A negative pressure fan is arranged on the breeding warehouse and is located on the side of the breeding space facing away from the transport channel. The negative pressure fan and the fresh air mechanism are used to form an airflow in the breeding space from the fresh air mechanism to the negative pressure fan.

2. The black soldier fly breeding environment control system according to claim 1, characterized in that: The fresh air mechanism includes a fresh air fan and an air equalizing member, the fresh air fan is arranged on the breeding warehouse, the air equalizing member is arranged at the air outlet of the fresh air fan, a plurality of evenly arranged air equalizing channels are formed in the air equalizing member, and the area of ​​the breeding space facing the air equalizing member is greater than or equal to the cross-sectional size of the breeding space.

3. The black soldier fly breeding environment control system according to claim 2, characterized in that: The black soldier fly breeding environmental control system also includes a wind wall, which includes an air induced passage and a plurality of disturbance fans. The air induced passage is arranged on the side wall of the breeding space. An air induced port is formed at one end of the air induced passage. The air induced port faces the transport passage and is connected to the transport passage. The plurality of disturbance fans are installed on the side of the air induced passage facing the breeding space.

4. The black soldier fly breeding environment control system according to claim 3, characterized in that: The breeding space is divided into at least three layers in the vertical direction, and each layer of the breeding space is divided into at least three independent temperature control areas along the direction from the fresh air mechanism to the negative pressure fan. Each of the independent temperature control areas is correspondingly provided with an environmental monitoring sensor, and the disturbance fan is electrically connected to the environmental monitoring sensor. The disturbance fan corresponding to each independent temperature control area is controlled to operate according to the detection result of the environmental monitoring sensor in the area.

5. The black soldier fly breeding environment control system according to claim 4, characterized in that: The wind walls are arranged on opposite side walls of the breeding space, the disturbance fans of each wind wall are arranged in two rows in an alternating manner, the disturbance fans of two opposite wind walls are arranged in an alternating manner, and the horizontal offset of the disturbance fans is 0.3-0.5 times the diameter of the disturbance fans; and / or A rotatable guide plate is provided in the air induction channel, and the rotation axis direction of the guide plate is toward the breeding space.

6. The black soldier fly breeding environment control system according to any one of claims 2 to 5, characterized in that: At least two breeding spaces are formed in the breeding warehouse, and one side of each breeding space facing the fresh air mechanism is connected to the transport channel, and each breeding space is correspondingly provided with at least one fresh air fan and at least one negative pressure fan, and a wind partition is provided between two adjacent breeding spaces, and the wind partition can be moved into the transport channel to separate the two adjacent breeding spaces; and / or An air outlet is provided on the side wall of the breeding warehouse opposite to the side where the fresh air mechanism is provided, an air collecting nozzle is connected to the side of the air outlet facing away from the breeding space, the negative pressure fan is installed on the side of the air collecting nozzle facing away from the air outlet, and the cross-sectional dimension of the air collecting nozzle tends to decrease from the air outlet to the negative pressure fan; and / or The black soldier fly breeding environmental control system also includes a control air valve, a return air duct and a deodorization system. The air outlet end of the negative pressure fan, the return air duct and the deodorization system are respectively connected to three interfaces of the control air valve. The control air valve is used to control the air volume of the negative pressure fan entering the return air duct and the deodorization system. The other end of the return air duct is connected to the air equalization component.

7. A method for controlling the environment of black soldier flies breeding, characterized in that: The black soldier fly breeding environment control method comprises: Step S1: obtaining current breeding environment parameters and insect physiological parameters of the breeding space, and constructing an initial environmental prediction model of the breeding space according to the current breeding environment parameters and the insect physiological parameters; Step S2: predicting the change of the breeding environment according to the initial environment prediction model; Step S3: Calculate the difference between the aquaculture environment change amount and a preset threshold value to obtain an environmental deviation amount; Step S4: determining the target start / stop quantity and target position of the disturbance fan of the wind wall based on the amplitude range of the environmental deviation, and generating a variable frequency control signal of the fresh air fan according to the change gradient of the environmental deviation; Step S5: In response to the target start-stop quantity and target position, the disturbance fans of corresponding quantity and position in the wind wall are controlled to start and run, and the motor speed of the fresh air fan and the output power of the refrigeration unit are adjusted according to the variable frequency control signal to control the flow rate and temperature of the fresh air delivered to the breeding space.

8. The method for controlling the breeding environment of black soldier flies according to claim 7, characterized in that: After step S3, the following steps are also included: Based on the amplitude range of the environmental deviation, generating a return air proportional valve adjustment parameter; Adjust the opening of the return air duct according to the return air proportional valve adjustment parameters.

9. The method for controlling the breeding environment of black soldier flies according to claim 7, characterized in that: The step S1 comprises: Acquire physiological parameters of insects in the breeding space, and establish an insect heat production model that characterizes the insect metabolic heat production rate based on the insect physiological parameters. The insect heat production model is: Q gen =N·f(a)·g(T); where N is the number of insects; f(a) is the heat production coefficient of insect age; g(T) is the function of the effect of temperature on activity; The current breeding environment parameters of the breeding space are obtained, and a system heat dissipation model characterizing the heat exchange characteristics of the breeding system is established based on the current environmental temperature. The system heat dissipation model is: Q loss =hA(T-T env )+ηV; where h is the comprehensive heat dissipation coefficient (W / (m 2 ℃), A is the effective heat dissipation area (m 2 ), T env is the current ambient temperature (°C), T is the current temperature of the insect body (°C), η is the ventilation and heat dissipation efficiency (W / m 3 ), V is the ventilation volume (m 3 / s); The insect body heat generation model is coupled with the system heat dissipation model to construct an initial environment prediction model for the breeding space. The initial environment prediction model is: Among them, Δt is the time step, and C is the total heat capacity of the aquaculture system (J / ℃).

10. The method for controlling the breeding environment of black soldier flies according to any one of claims 7 to 9, characterized in that: The step S2 comprises: Acquire environmental monitoring data and insect growth data in historical breeding cycles, use a neural network to optimize parameters of the initial environmental prediction model, and generate an optimized breeding environment prediction model; The aquaculture environment parameters collected in real time are input into the optimized aquaculture environment prediction model to calculate the predicted value of the environmental temperature change within a preset time window.

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