Activation device for fly maggot breeding

Abstract

The utility model discloses an activating device for fly maggot breeding. The activating device comprises a base, a main box body, a gas adjusting assembly, an activating tray, a driving assembly and a plurality of functional modules. The gas adjusting assembly realizes uniform distribution of gas through a gas mixing chamber and a flow equalizing plate; the activation tray is driven by the driving assembly to reciprocate and is combined with the vibration module to improve the activity of fly maggots; the humidity adjusting module and the illumination adjusting module cooperatively provide precise environmental conditions. Through the multi-module integrated design, the problems that an existing device is uneven in gas circulation and poor in activation effect are solved, the activation efficiency and quality of fly maggot culture are remarkably improved, and the device is suitable for large-scale culture scenes and has high practicability and popularization value.

Description

Technical Field

[0001] This utility model relates to the field of agricultural breeding and biological treatment technology, and in particular to an activation device for fly larvae breeding. Background Technology

[0002] In fly larvae farming, activation treatment is a crucial step in enhancing larval activity and farming efficiency. This process is particularly important for large-scale farming, as it requires not only providing suitable environmental conditions but also ensuring that the larvae can quickly enter their optimal growth state, which helps improve subsequent farming results and yield.

[0003] Because fly larvae are highly sensitive to their environment, ideal activation results can only be achieved under specific conditions. Therefore, optimizing the activation device is crucial. Existing activation devices mostly achieve activation through simple temperature and humidity control. However, since fly larvae have high requirements for the gas environment, existing devices are insufficient in terms of gas flow and uniformity. This makes it difficult to achieve the ideal activation effect, and adjusting the device parameters requires additional time and effort. Therefore, existing devices have certain limitations in activation treatment. Utility Model Content

[0004] The purpose of this utility model is to provide an activation device for fly larvae breeding, which solves the problems mentioned in the background art.

[0005] This invention is achieved as follows: an activation device for fly larvae breeding.

[0006] Includes a base, with a main chamber located above the base. The main chamber has an internal cavity divided into upper and lower layers: the upper layer is a gas conditioning chamber, and the lower layer is an activation chamber; also includes:

[0007] A gas conditioning assembly is installed inside a gas conditioning chamber. The gas conditioning assembly includes multiple independent gas channel units. Each gas channel unit consists of a set of parallel gas guide tubes. One end of each gas guide tube is connected to an air inlet on the side wall of the gas conditioning chamber, and the other end extends to the top of the activation chamber and is fixedly connected to a flow equalization plate. The flow equalization plate has a porous structure with several evenly distributed air outlets on its surface. A flexible diaphragm is provided at the bottom of the flow equalization plate. The edge of the flexible diaphragm is sealed to the inner wall of the activation chamber, and a buffer chamber is formed between the central area of ​​the flexible diaphragm and the flow equalization plate.

[0008] The activation chamber is equipped with multiple activation trays. Each activation tray consists of two symmetrical arc-shaped trays. The bottom of the arc-shaped trays is equipped with slide rails that cooperate with guide grooves on the inner wall of the activation chamber. Limiting blocks are set on both sides of the arc-shaped trays, and the limiting blocks match the limiting grooves in the guide grooves. The bottom of the activation trays is equipped with vent holes with a diameter smaller than the minimum size of fly larvae to prevent fly larvae from passing through.

[0009] The drive assembly is mounted on one side of the base and includes a motor, a drive shaft, and a cam mechanism. The output shaft of the motor is connected to one end of the drive shaft via a coupling, and the other end of the drive shaft is fixedly connected to the input end of the cam mechanism. The output end of the cam mechanism contacts the bottom of the activation tray, and the cam mechanism is used to drive the activation tray to reciprocate within the guide rail groove.

[0010] Preferably, a gas mixing chamber is provided at the top of the gas regulating chamber, and a stirring blade is installed in the gas mixing chamber. The stirring blade is connected to a micro motor outside the gas regulating chamber through a rotating shaft. Multiple air inlet branches are provided on the side wall of the gas mixing chamber. The air inlet branches are respectively connected to an oxygen source, a carbon dioxide source and a nitrogen source. The bottom of the gas mixing chamber is connected to a gas guide pipe through a flow equalization pipe.

[0011] Preferably, the bottom of the activation tray is provided with a vibration module, which includes a vibrating plate and a vibration spring. The vibrating plate is fixed to the center of the bottom of the activation tray. Both ends of the vibrating plate are connected to the inner wall of the activation chamber through the vibration spring. A magnetic oscillator is provided in the middle of the vibrating plate. The magnetic oscillator corresponds to the electromagnet at the bottom of the activation chamber. The electromagnet is connected to the controller through a wire.

[0012] Preferably, a humidity control module is provided on the side wall of the activation chamber. The humidity control module includes a water mist nozzle and a humidity sensor. The water mist nozzle is connected to a water storage tank outside the activation chamber through a water pipe. A water pump is provided inside the water storage tank. The water pump is connected to a controller through a wire. The humidity sensor is fixed on the inner wall of the activation chamber and is connected to the controller via a signal.

[0013] Preferably, the top of the activation chamber is provided with a light adjustment module, which includes multiple sets of LED light strips. The LED light strips are evenly distributed along the length of the top of the activation chamber. The LED light strips are connected to the controller through wires, and the controller is connected to an external power supply through signal lines.

[0014] Preferably, a collection tank is provided at the bottom of the activation chamber, and an inclined guide plate is provided at the bottom of the collection tank. The lower end of the guide plate is connected to the discharge port, and a control valve is provided at the discharge port. The control valve is connected to the controller through a signal line.

[0015] The activation device for fly larvae breeding provided by this utility model works on the following principle:

[0016] The gas conditioning component mixes different types of gases in proportion through the gas mixing chamber and then delivers them to the gas guide pipe. After being evenly distributed by the flow equalization plate, the gas enters the activation chamber. The flexible diaphragm undergoes slight deformation under the gas pressure, thereby forming a dynamic gas flow field, making the gas distribution in the activation chamber more uniform.

[0017] The drive component drives the cam mechanism through a motor, which pushes the activation tray to move back and forth in the guide rail groove. The reciprocating motion of the arc-shaped tray causes the fly larvae to turn over continuously in the tray, thus fully contacting the gas and humidity environment.

[0018] The vibration module generates periodic vibrations through the interaction between an electromagnet and a magnetic oscillator, further promoting the activity of fly larvae and the flow of gas;

[0019] The humidity control module controls the start and stop of the water pump based on the feedback signal from the humidity sensor, and the water mist nozzle sprays an appropriate amount of water mist into the activation chamber to maintain a suitable humidity environment.

[0020] The light adjustment module adjusts the brightness and color of the LED light strips through the controller to simulate natural light conditions and promote the physiological metabolism of fly larvae;

[0021] The activation device for fly larvae breeding provided by this utility model has the following beneficial effects:

[0022] By combining the gas conditioning components and the flexible diaphragm, uniform gas distribution and dynamic flow are achieved, solving the problem of uneven gas flow in existing devices.

[0023] The reciprocating movement of the activation tray combined with the vibration module design significantly improves the activity and environmental adaptability of fly larvae, avoiding the poor activation effect caused by fly larvae accumulation in traditional devices;

[0024] The synergistic effect of the humidity control module and the light control module provides more precise environmental conditions for fly larvae, improving the efficiency and quality of activation;

[0025] The integrated design of each functional module makes the device compact, easy to operate, and suitable for large-scale breeding scenarios;

[0026] In summary, this utility model, through reasonable structural design and synergistic cooperation of functional modules, not only solves the shortcomings of existing activation devices but also significantly improves the activation effect and production efficiency of fly larvae farming, and has high practicality and promotion value. Attached Figure Description

[0027] Figure 1 The schematic diagram of the overall structure of the activation device for fly larvae breeding provided by this utility model shows the layered layout of the main body, the gas conditioning chamber and the activation chamber, as well as the distribution of the main functional modules.

[0028] Figure 2 This utility model Figure 1 A partial structural diagram.

[0029] Figure 3 This utility model Figure 2 Enlarged view of point A.

[0030] The attached diagram is labeled as follows: 1. Main chamber; 2. Gas conditioning chamber; 3. Activation chamber; 4. Air guide pipe; 5. Flow equalization plate; 6. Flexible diaphragm; 7. Arc-shaped tray; 8. Slide rail; 9. Vent hole; 10. Guide rail groove. Detailed Implementation

[0031] This utility model provides an activation device for fly larvae breeding, which is described below in conjunction with the appendix. Figure 1 To be continued Figure 3 The specific embodiments of this utility model are described in detail below. The main housing 1 is the main frame of the overall device, and its interior is divided into upper and lower layers. The upper layer is the gas conditioning chamber 2, and the lower layer is the activation chamber 3. The gas conditioning chamber 2 and the activation chamber 3 are connected by a gas guide pipe 4. One end of the gas guide pipe 4 is fixed to the side wall of the gas conditioning chamber 2 and communicates with the air inlet, while the other end extends to the top of the activation chamber 3 and is fixedly connected to the flow equalization plate 5. The flow equalization plate 5 has a porous structure with several evenly distributed air outlets on its surface for evenly distributing the gas into the activation chamber 3. A flexible diaphragm 6 is provided at the bottom of the flow equalization plate 5. The edge of the flexible diaphragm 6 is sealed to the inner wall of the activation chamber 3, and a buffer chamber is formed between its central area and the flow equalization plate 5. The design of this buffer chamber allows the gas to undergo slight dynamic deformation when entering the activation chamber 3, thereby achieving uniform gas flow.

[0032] The activation chamber 3 contains multiple sets of activation trays, each set consisting of two symmetrical arc-shaped trays 7. A slide rail 8 is installed at the bottom of each arc-shaped tray 7, which engages with a guide groove 10 on the inner wall of the activation chamber 3 to ensure smooth movement of the arc-shaped tray 7 within the guide groove 10. Limiting blocks are installed on both sides of each arc-shaped tray 7, matching the limiting grooves within the guide groove 10 to prevent the arc-shaped tray 7 from shifting or falling off during movement. A ventilation hole 9 is provided at the bottom of each arc-shaped tray 7, with a diameter designed to be smaller than the minimum size of a fly larva to prevent fly larvae from passing through the ventilation hole 9 and falling to the bottom of the activation chamber 3. The reciprocating movement of the arc-shaped tray 7 is controlled by a drive assembly, which includes a motor, a drive shaft, and a cam mechanism. The motor is mounted on one side of the base, and its output shaft is connected to one end of the drive shaft via a coupling. The other end of the drive shaft is fixedly connected to the input end of the cam mechanism. The output end of the cam mechanism contacts the bottom of the arc-shaped tray 7. When the motor is running, the cam mechanism pushes the arc-shaped tray 7 to reciprocate along the guide rail groove 10.

[0033] A gas mixing chamber is located at the top of the gas regulating chamber 2. A stirring blade is installed inside the gas mixing chamber, and the stirring blade is connected to a miniature motor outside the gas regulating chamber 2 via a rotating shaft. Multiple air inlet branches are installed on the side wall of the gas mixing chamber, connecting to oxygen, carbon dioxide, and nitrogen sources respectively, for mixing different types of gases in proportion. The mixed gas is then connected to the gas guide pipe 4 through a flow equalization pipe and finally delivered to the activation chamber 3. This design ensures precise control and uniform distribution of the gas composition, thereby meeting the high requirements of fly larvae for the gas environment.

[0034] A vibration module, comprising a vibrating plate and a vibrating spring, is installed at the bottom of the activation tray. The vibrating plate is fixed to the center of the bottom of the arc-shaped tray 7, with its two ends connected to the inner wall of the activation chamber 3 via the vibrating springs. A magnetic oscillator is installed in the middle of the vibrating plate, corresponding to an electromagnet at the bottom of the activation chamber 3. The electromagnet is connected to a controller via a wire. When the electromagnet is energized, periodic attractive and repulsive forces are generated between the magnetic oscillator and the electromagnet, thereby causing the vibrating plate and the arc-shaped tray 7 to vibrate. This vibration module design further promotes the activity of fly larvae and the flow of gas.

[0035] A humidity control module, comprising a water mist nozzle and a humidity sensor, is installed on the side wall of the activation chamber 3. The water mist nozzle is connected to a water tank outside the activation chamber 3 via a water pipe. A water pump is installed inside the water tank and connected to the controller via a wire. The humidity sensor is fixed to the inner wall of the activation chamber 3 and is signal-connected to the controller. The humidity sensor monitors the humidity data inside the activation chamber 3 in real time and feeds the data back to the controller. When the humidity is lower than the set value, the controller starts the water pump, and the water mist nozzle sprays an appropriate amount of water mist into the activation chamber 3 to maintain a suitable humidity environment. When the humidity reaches the set value, the controller stops the water pump.

[0036] A light adjustment module is installed at the top of the activation chamber 3. This module includes multiple LED strips evenly distributed along the length of the top of the activation chamber 3. The LED strips are connected to a controller via wires, and the controller is connected to an external power supply via signal lines. The controller adjusts the brightness and color of the LED strips according to preset light parameters to simulate natural light conditions. The design of the light adjustment module provides a stable light environment for the fly larvae, which helps their normal physiological metabolism.

[0037] A collection trough is installed at the bottom of the activation chamber 3, and an inclined guide plate is installed at the bottom of the collection trough. The lower end of the guide plate is connected to the discharge port. A control valve is installed at the discharge port, and the control valve is connected to the controller via a signal line. When the activation process is completed, the controller opens the control valve, and the fly larvae automatically flow to the discharge port through the guide plate for centralized collection and subsequent processing.

[0038] The working process of this utility model is as follows: First, oxygen, carbon dioxide, and nitrogen are mixed in proportion in the gas mixing chamber and then transported to the gas guide pipe 4. After being evenly distributed by the flow equalization plate 5, the mixture enters the activation chamber 3. The flexible diaphragm 6 undergoes slight deformation under gas pressure, forming a dynamic gas flow field, making the gas distribution in the activation chamber 3 more uniform. Simultaneously, the motor in the drive assembly drives the cam mechanism through the transmission shaft. The cam mechanism pushes the arc-shaped tray 7 to reciprocate within the guide rail groove 10, causing the fly larvae to continuously tumble within the arc-shaped tray 7, fully contacting the gas and humidity environment. The electromagnet and magnetic oscillator in the vibration module interact, causing the vibrating plate and the arc-shaped tray 7 to vibrate periodically, further promoting the activity of the fly larvae and the gas flow effect. The humidity adjustment module controls the start and stop of the water pump based on the feedback signal from the humidity sensor, and the water mist nozzle sprays an appropriate amount of water mist into the activation chamber 3 to maintain a suitable humidity environment. The light adjustment module adjusts the brightness and color of the LED light strips through the controller to simulate natural light conditions and promote the physiological metabolism of the fly larvae. Finally, after the activation process is complete, the controller opens the control valve at the discharge port, and the fly larvae flow through the guide plate to the discharge port, completing the collection.

[0039] In the above embodiments, the connection and positional relationships between the components are clearly defined, and the functional modules work together to achieve the activation process of fly larvae breeding. The main housing 1 serves as the overall frame supporting all components, and the layered layout of the gas regulation chamber 2 and the activation chamber 3 ensures the separation and efficient coordination of the gas regulation and activation processes. The design of the gas guide pipe 4, the flow equalization plate 5, and the flexible diaphragm 6 achieves uniform gas distribution and dynamic flow. The arc-shaped tray 7 achieves smooth reciprocating movement through the cooperation of the slide rail 8 and the guide rail groove 10, and the vibration module further enhances the activity of the fly larvae. The humidity regulation module and the light regulation module provide suitable environmental conditions for the fly larvae through precise control. The entire device has a compact structure, is easy to operate, and is suitable for large-scale breeding scenarios.

[0040] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the specific implementation principle of this utility model is provided in conjunction with a specific application scenario.

[0041] In the fly larvae breeding process, the fly larvae are first evenly placed on the curved tray 7. Ventilation holes 9 are provided at the bottom of the curved tray 7. The diameter of the ventilation holes 9 is designed to be smaller than the minimum size of the fly larvae, ensuring that the fly larvae will not pass through the ventilation holes 9 and fall to the bottom of the activation chamber 3. The curved tray 7 is installed in the activation chamber 3 through the cooperation of the slide rail 8 and the guide rail groove 10. The limiting block matches the limiting groove in the guide rail groove 10 to prevent the curved tray 7 from shifting or falling off during movement. When the motor in the drive assembly starts, the transmission shaft drives the cam mechanism to rotate. The cam mechanism pushes the curved tray 7 to reciprocate along the guide rail groove 10, causing the fly larvae to continuously turn over within the curved tray 7, fully contacting the gas and humidity environment.

[0042] Simultaneously, the gas regulating chamber 2 begins operation. The stirring blades within the gas mixing chamber are driven to rotate by a micro-motor, mixing the input gases from the oxygen, carbon dioxide, and nitrogen sources according to a preset ratio. The mixed gas is then transported through the flow equalization pipe to the gas guide pipe 4 and finally enters the flow equalization plate 5 at the top of the activation chamber 3. The flow equalization plate 5 has a porous structure with several evenly distributed gas outlet holes on its surface, enabling uniform gas distribution within the activation chamber 3. A flexible diaphragm 6 is located at the bottom of the flow equalization plate 5, its edges sealed to the inner wall of the activation chamber 3, and its central region forming a buffer chamber with the flow equalization plate 5. When gas passes through the flow equalization plate 5, the flexible diaphragm 6 undergoes slight dynamic deformation under gas pressure, further optimizing the gas flow field and ensuring a more uniform gas distribution within the activation chamber 3.

[0043] At the bottom of the arc-shaped tray 7, the vibration module works in conjunction. When the electromagnet is energized, it generates periodic attractive and repulsive forces with the magnetic oscillator, thereby causing the vibrating plate and the arc-shaped tray 7 to vibrate. This vibration not only enhances the activity of the fly larvae but also promotes the flow of gas within the activation chamber 3, allowing the fly larvae to have more full contact with a suitable gas environment.

[0044] A humidity control module installed on the side wall of activation chamber 3 adjusts the ambient humidity based on real-time monitoring data from a humidity sensor. When the humidity is lower than the set value, the controller starts the water pump, and water from the storage tank is transported through a water pipe to the water mist nozzle, spraying an appropriate amount of water mist into activation chamber 3 to maintain suitable humidity conditions. When the humidity reaches the set value, the controller stops the water pump to prevent excessive humidity from adversely affecting fly larvae.

[0045] The lighting adjustment module simulates natural lighting conditions using LED light strips. The controller adjusts the brightness and color of the LED light strips according to preset lighting parameters. The LED light strips, evenly distributed along the length of the top of the activation chamber 3, provide a stable lighting environment for the fly larvae. Proper lighting adjustment helps the fly larvae's physiological metabolism proceed normally, thereby improving the activation effect.

[0046] After the activation process is complete, the controller opens the control valve at the discharge port. The fly larvae automatically flow to the discharge port through the inclined guide plate, facilitating centralized collection and subsequent processing. Through the coordinated operation of its various functional modules, the entire device achieves the efficient completion of the fly larvae breeding and activation process.

[0047] In the above steps, the layered layout of the gas conditioning chamber 2 and the activation chamber 3 ensures the separation and efficient coordination of the gas conditioning and activation processes. The design of the gas guide tube 4, the flow equalization plate 5, and the flexible diaphragm 6 achieves uniform gas distribution and dynamic flow, while the reciprocating movement of the arc-shaped tray 7, combined with the vibration module, significantly improves the activity of the fly larvae. The humidity control module and the light control module provide suitable environmental conditions for the fly larvae through precise control. The entire device has a compact structure, is easy to operate, and is suitable for large-scale aquaculture scenarios.

[0048] All content not described in detail in this specification is prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are prior art, and will not be described further here.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An activation device for fly larvae breeding, comprising a main housing (1), the inner cavity of the main housing (1) being divided into upper and lower layers, the upper layer being a gas conditioning chamber (2) and the lower layer being an activation chamber (3), characterized in that, Also includes: A gas regulating assembly is installed in a gas regulating chamber (2). The gas regulating assembly includes multiple independent airway units. Each airway unit consists of a set of parallel air guide tubes (4). One end of the air guide tube (4) is connected to the air inlet on the side wall of the gas regulating chamber (2), and the other end extends to the top of the activation chamber (3) and is fixedly connected to the flow equalization plate (5). The flow equalization plate (5) has a porous structure with several evenly distributed air outlets on its surface. A flexible diaphragm (6) is provided at the bottom of the flow equalization plate (5). The edge of the flexible diaphragm (6) is sealed to the inner wall of the activation chamber (3). A buffer chamber is formed between the central area of ​​the flexible diaphragm (6) and the flow equalization plate (5). The activation chamber (3) is provided with multiple sets of activation trays. Each set of activation trays consists of two symmetrical arc-shaped trays (7). The bottom of the arc-shaped tray (7) is provided with a slide rail (8). The slide rail (8) cooperates with the guide rail groove (10) on the inner wall of the activation chamber (3). Limiting blocks are provided on both sides of the arc-shaped tray (7). The limiting blocks match the limiting groove in the guide rail groove (10). The bottom of the arc-shaped tray (7) is provided with a vent hole (9). The diameter of the vent hole (9) is smaller than the minimum size of the fly larva. The drive assembly is installed on one side of the main housing (1). The drive assembly includes a motor, a transmission shaft and a cam mechanism. The output shaft of the motor is connected to one end of the transmission shaft through a coupling, and the other end of the transmission shaft is fixedly connected to the input end of the cam mechanism. The output end of the cam mechanism contacts the bottom of the arc-shaped tray (7) and is used to drive the arc-shaped tray (7) to reciprocate within the guide rail groove (10).

2. The activation device for fly larvae breeding according to claim 1, characterized in that, The top of the gas regulating chamber (2) is provided with a gas mixing chamber, and stirring blades are installed in the gas mixing chamber. The stirring blades are connected to a micro motor outside the gas regulating chamber (2) through a rotating shaft. Multiple air inlet branches are provided on the side wall of the gas mixing chamber. The air inlet branches are connected to an oxygen source, a carbon dioxide source and a nitrogen source respectively. The bottom of the gas mixing chamber is connected to the gas guide pipe (4) through a flow equalization pipe.

3. The fly breeding activation device according to claim 1, characterized by The bottom of the arc-shaped tray (7) is provided with a vibration module. The vibration module includes a vibrating plate and a vibration spring. The vibrating plate is fixed to the center of the bottom of the arc-shaped tray (7). The two ends of the vibrating plate are connected to the inner wall of the activation chamber (3) through the vibration spring. A magnetic oscillator is provided in the middle of the vibrating plate. The magnetic oscillator corresponds to the electromagnet at the bottom of the activation chamber (3). The electromagnet is connected to the controller through a wire.

4. The fly breeding activation device according to claim 1, wherein A humidity control module is provided on the side wall of the activation chamber (3). The humidity control module includes a water mist nozzle and a humidity sensor. The water mist nozzle is connected to a water tank outside the activation chamber (3) through a water pipe. A water pump is provided inside the water tank. The water pump is connected to the controller through a wire. The humidity sensor is fixed on the inner wall of the activation chamber (3) and is connected to the controller signal.

5. The fly breeding activation device according to claim 1, wherein The top of the activation cavity (3) is provided with a light adjustment module, which includes multiple sets of LED light strips. The LED light strips are evenly distributed along the length of the top of the activation cavity (3). The LED light strips are connected to the controller through wires, and the controller is connected to an external power supply through signal lines.

6. The activation device for fly larvae breeding according to claim 1, characterized in that, The bottom of the activation chamber (3) is provided with a collection tank, and the bottom of the collection tank is provided with an inclined guide plate. The lower end of the guide plate is connected to the discharge port. A control valve is provided at the discharge port, and the control valve is connected to the controller through a signal line.

7. The activation device for fly larvae breeding according to claim 1, characterized in that, The diameter of the ventilation holes (9) of the arc-shaped tray (7) is 0.5 mm to 1 mm, and the number of ventilation holes (9) is 10 to 20 per square centimeter depending on the area of ​​the arc-shaped tray (7).

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