Mosquito coil smoke generating device for inhalation toxicity test

Abstract

The utility model discloses a mosquito incense smoke generating device for inhalation toxicity test belongs to test equipment technical field, including upper cylinder, with the upper cylinder detachable splicing lower cylinder and the vertical stack placement in the upper cylinder with lower cylinder's several mosquito incense tray, the lower cylinder is equipped with air supply mechanism, the air supply mechanism includes: fan, the fan is fixedly connected with the power source output end of lower cylinder bottom installation, and the power source is used for driving the fan rotation air -blowing, this mosquito incense smoke generating device for inhalation toxicity test makes air be rotated dispersion in the ascending process through the linkage of fan and rotary conveying structure, and each layer mosquito incense tray obtains equal flow, and the combustion speed tends to be consistent, and the smoke concentration fluctuation reduces, and the upper cylinder is locked with the lower cylinder through the snap -on, and the transparent observation window provides real -time field of vision, and the plugging structure can stepless regulation air intake in the midway of test, and even cut off the air completely and make mosquito incense extinguish.

Description

Technical Field

[0001] This utility model specifically relates to a mosquito smoke generator for inhalation toxicity testing, belonging to the technical field of testing equipment. Background Technology

[0002] Mosquito coils are coiled or stick-shaped burning products used to repel or kill mosquitoes. They are usually made by mixing and pressing wood powder, charcoal powder, binders, and a small amount of insecticides (such as pyrethroids or pyrethroids). When lit, mosquito coils burn slowly and release smoke containing insecticidal active ingredients, creating an aerosol environment in a confined space that has a toxic or repellent effect on mosquitoes, thereby achieving the effect of preventing or killing mosquitoes. Inhalation toxicity tests are required during the production of mosquito coils.

[0003] In inhalation toxicity tests, the smoke generated by burning mosquito coils needs to be delivered to the exposure chamber at a stable concentration and continuous flow rate to simulate the actual inhalation environment for humans. Existing smoke generating devices mostly adopt static combustion or unidirectional direct blowing methods: static combustion relies on natural convection, and the smoke rising speed is affected by fluctuations in room temperature and humidity, resulting in large concentration differences; although unidirectional direct blowing can provide forced airflow, the air outlet is fixed, and the air volume received by each layer of mosquito coil is uneven, resulting in insufficient oxygen supply in the upper layer and excessive wind speed in the lower layer, leading to inconsistent combustion speeds and fluctuating smoke release, which affects the test results. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a mosquito smoke generator for inhalation toxicity testing, thereby solving the problems mentioned in the background section.

[0005] A mosquito coil smoke generator for inhalation toxicity testing includes an upper cylinder, a lower cylinder detachably connected to the upper cylinder, and a plurality of mosquito coil discs vertically stacked within the upper and lower cylinders. The lower cylinder is equipped with an air supply mechanism, which includes:

[0006] A fan is fixedly connected to the output end of a power source installed at the bottom of the lower cylinder, and the power source is used to drive the fan to rotate and blow air.

[0007] A circular placement plate is horizontally fixed to the inner cavity of the lower cylinder to support the bottommost mosquito coil tray.

[0008] A rotating conveying structure is arranged around the outer periphery of the circular placement plate and rotates relative to the circular placement plate, for conveying the airflow blown out by the fan in layers and evenly to the burning surface of each layer of the mosquito coil.

[0009] Furthermore, the mating end faces of the upper cylinder and the lower cylinder are provided with several buckles at equal intervals along the circumference for quick locking or releasing the two.

[0010] A transparent observation window is embedded in the wall of the upper cylinder along the axial direction for real-time observation of the burning status of the mosquito coil;

[0011] An air outlet pipe is provided at the top of the upper cylinder.

[0012] Furthermore, the lower cylinder is also provided with a sealing structure, the sealing structure comprising:

[0013] A sealing ring is rotatably fitted into an annular slot corresponding to the side wall of the lower cylinder. Both the slot and the sealing ring are provided with vent holes. The effective ventilation area can be changed by rotating the sealing ring.

[0014] A plurality of push blocks are circumferentially fixed to the outer wall of the sealing ring and extend outward. The lower cylinder sidewall is provided with a sliding groove for the push blocks to slide, which is used to maintain the adjustment position of the sealing ring.

[0015] Furthermore, a number of support blocks are fixedly connected to the bottom of the lower cylinder in a ring array, and a support disk is fixedly connected to the top of each support block. The vertical cross-section of the support disk is L-shaped.

[0016] The support plate is coaxially fixed to the circular placement plate by several connecting columns. The upper surface of the circular placement plate is flush with the top horizontal annular surface of the support plate, and the outer diameter of the circular placement plate is larger than the diameter of the central opening of the support plate, so as to form an annular gap for airflow.

[0017] Furthermore, several legs are fixed to the outer edge of the lower surface of each mosquito coil, and adjacent mosquito coils are supported by the legs to form a burning space with a constant spacing.

[0018] Furthermore, the rotating conveying structure includes:

[0019] The gear is fixed to a rotating column that is vertically rotatably mounted on the bottom wall of the lower cylinder. The rotating column is connected to the output shaft of the power source via a synchronous belt.

[0020] A rotating ring is rotatably fitted into the annular gap between the support disk and the circular placement plate;

[0021] An internal gear ring is coaxially fixed to the outer periphery of the rotating ring, and a convex ring extends from its outer wall. The convex ring is rotatably embedded in a corresponding limiting groove opened on the inner wall of the lower cylinder. The internal gear ring meshes with the gear to transmit the rotational motion of the power source to the rotating ring.

[0022] At least two air supply pipes are axially fixed to the upper surface of the rotating ring and extend upward. Each air supply pipe has a delivery port at a position corresponding to the height of each layer of mosquito coil. The inner cavity of the air supply pipe is connected to the annular cavity of the rotating ring, and is used to rotate and spray airflow to each layer of the combustion surface.

[0023] Furthermore, the power source is a motor installed on the bottom wall of the lower cylinder, and the output shaft of the motor extends into the lower cylinder through a sealed bearing to drive the fan and the rotating conveying structure to operate synchronously.

[0024] Beneficial effects:

[0025] This invention links the fan with a rotating conveyor structure, causing the air to be dispersed during the ascent, ensuring that each layer of mosquito coil receives an equal amount of airflow, resulting in a more consistent combustion speed and reduced fluctuations in smoke concentration. The upper and lower cylinders are quickly locked together via a snap fastener, and a transparent observation window provides a real-time view. The sealing structure allows for stepless adjustment of the air intake during the test, and can even completely cut off the airflow to extinguish the mosquito coil. The operation does not require opening the lid, reducing external interference and shortening preparation time. The annular gap between the support plate and the circular placement plate guides the airflow evenly, and the constant layer spacing maintained by the support legs eliminates eddies and dead zones, ensuring stable smoke output. The motor directly drives the fan and air supply pipe synchronously via a sealed bearing, automatically matching the airflow and rotation frequency. Even after long-term operation, the flow rate and concentration remain continuously stable, providing repeatable and reliable exposure conditions for inhalation toxicity tests. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the present invention, showing the separation of the upper and lower cylinders;

[0028] Figure 3 This is a schematic diagram of the upper cylinder of this utility model;

[0029] Figure 4 This is a schematic diagram of the lower cylinder of this utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the mosquito coil tray of this utility model;

[0031] Figure 6 This is an exploded structural diagram of the air supply mechanism of this utility model;

[0032] Figure 7 This is a schematic diagram of the internal structure of the lower cylinder of this utility model;

[0033] Figure 8 This is a structural schematic diagram of the disassembled lower cylinder of this utility model;

[0034] Figure 9 This is a schematic diagram of the structure of the fan of this utility model;

[0035] Figure 10 This is a cross-sectional structural schematic diagram of the air supply mechanism of this utility model;

[0036] Figure 11 This is a schematic diagram of the circular placement plate of this utility model;

[0037] Figure 12 This is a schematic diagram of the air supply duct of this utility model.

[0038] In the diagram: 1. Upper cylinder; 2. Air outlet pipe; 3. Lower cylinder; 4. Support block; 5. Support plate; 6. Circular placement plate; 7. Mosquito coil tray; 8. Support leg; 9. Rotating ring; 10. Internal gear ring; 11. Air supply pipe; 12. Protruding ring; 13. Sliding groove; 14. Limiting groove; 15. Sealing ring; 16. Pushing block; 17. Motor; 18. Fan; 19. Rotating column; 20. Gear. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Please see Figures 1-12 As shown, a mosquito coil smoke generator for inhalation toxicity testing includes an upper cylinder 1, a lower cylinder 3 detachably connected to the upper cylinder 1, and a plurality of mosquito coil discs 7 vertically stacked within the upper cylinder 1 and the lower cylinder 3. The lower cylinder 3 is equipped with an air supply mechanism, which includes:

[0041] Fan 18, which is fixedly connected to the power source output end installed at the bottom of the lower cylinder 3, and the power source is used to drive the fan 18 to rotate and blow air;

[0042] A circular placement plate 6 is horizontally fixed to the inner cavity of the lower cylinder 3 and is used to support the bottom mosquito coil 7.

[0043] A rotating conveying structure is arranged around the outer periphery of the circular placement plate 6 and rotates relative to the circular placement plate 6. It is used to deliver the airflow blown out by the fan 18 in layers and evenly to the combustion surface of each layer of the mosquito coil 7.

[0044] In this embodiment, the fan 18 rotates continuously under the drive of the power source, drawing in external air from the bottom of the lower cylinder 3 and pushing it upward. The airflow first passes through the outer periphery of the circular placement plate 6 and is then intercepted by the rotating conveying structure. The rotating conveying structure rotates slowly around the outer periphery of the circular placement plate 6, and its internal cavity disperses the concentrated airflow from the fan 18 into multiple streams. With the help of the lateral speed generated by the rotation, the air is evenly sprayed onto the upper surface of each layer of mosquito coil 7, so that each mosquito coil receives an equal amount of oxygen during combustion, the combustion speed tends to be consistent, and the generated smoke rises synchronously with the airflow. After the upper cylinder 1 and the lower cylinder 3 are spliced ​​together, a continuous channel is formed. The smoke flows upward under the push of the subsequent airflow and is finally discharged from the top of the upper cylinder 1, thereby maintaining the continuous stability of smoke concentration and flow rate throughout the entire test period.

[0045] Please see Figures 1-8 As shown, as a technical optimization of this utility model, the mating end faces of the upper cylinder 1 and the lower cylinder 3 are provided with several buckles at equal intervals along the circumference for quick locking or releasing the two.

[0046] A transparent observation window is embedded in the wall of the upper cylinder 1 along the axial direction for real-time observation of the burning status of the mosquito coil;

[0047] The top of the upper cylinder 1 is provided with an air outlet pipe 2.

[0048] In this embodiment, the fasteners press the mating surfaces of the upper cylinder 1 and the lower cylinder 3 together circumferentially to form a repeatedly openable and closed sealed connection. This ensures that the internal smoke does not leak out during the experiment, and allows the fasteners to be released after the mosquito coil has burned out, enabling rapid separation and refilling of the two cylinders. The transparent observation window runs through the wall of the upper cylinder 1 axially, allowing the experimenter to directly observe the burning surface of the mosquito coil 7 without opening the lid, and to judge the remaining amount based on the burning length, and decide whether to replenish or terminate the exposure accordingly. The exhaust pipe 2 is located at the top of the upper cylinder 1, and its inner cavity is directly connected to the inside of the cylinder. Under the continuous blowing action of the fan 18, the smoke is continuously pushed to the exhaust pipe 2 and discharged through the external pipeline, thereby maintaining the continuous stability of airflow and concentration in the respiratory zone of the experimental animal.

[0049] Please see Figures 1-8 As shown, as a technical optimization of this utility model, the lower cylinder 3 is further provided with a sealing structure, the sealing structure including:

[0050] The sealing ring 15 is rotatably fitted into the annular slots corresponding to the side wall of the lower cylinder 3. Both the slots and the sealing ring 15 are provided with vent holes. The effective ventilation area can be changed by rotating the sealing ring 15.

[0051] A plurality of push blocks 16 are circumferentially fixed to the outer wall of the sealing ring 15 and extend outward. The side wall of the lower cylinder 3 is provided with a sliding groove 13 for the push blocks 16 to slide, which is used to maintain the adjustment position of the sealing ring 15.

[0052] In this embodiment, a small gap is left between the sealing ring 15 and the annular groove, which ensures that the sealing ring 15 can rotate smoothly within the side wall of the lower cylinder 3 and prevents airflow leakage from the edge. When the test requires a reduction in air intake, the operator moves either push block 16 to rotate the sealing ring 15 circumferentially along the sliding groove 13. The vent holes on the sealing ring 15 and the groove gradually misalign, the effective ventilation area decreases accordingly, the airflow entering the lower cylinder 3 decreases synchronously, the burning speed of the mosquito coil slows down, and the smoke concentration decreases. Conversely, moving the push block 16 in the opposite direction increases the overlap between the two holes, the air intake increases, the combustion speed increases, and the concentration increases, so that the sealing ring 15 and the vent holes on the lower cylinder 3 are completely misaligned, which can achieve a seal of the lower cylinder 3, causing the mosquito coil to extinguish due to lack of oxygen. The frictional resistance between the push block 16 and the groove wall can maintain the current angle of the sealing ring 15 after adjustment, thereby achieving real-time and stepless control of the airflow throughout the test.

[0053] Please see Figures 1-11 As shown, as a technical optimization of this utility model, a number of support blocks 4 are fixedly connected to the bottom of the inner cavity of the lower cylinder 3 in a ring array, and the top of each support block 4 is fixedly connected to a support disk 5. The vertical cross-section of the support disk 5 is L-shaped.

[0054] The support plate 5 is coaxially fixed to the circular placement plate 6 by several connecting columns. The upper surface of the circular placement plate 6 is flush with the top horizontal annular surface of the support plate 5, and the outer diameter of the circular placement plate 6 is larger than the diameter of the central opening of the support plate 5, so as to form an annular gap for airflow.

[0055] In this embodiment, the support block 4 horizontally elevates the support plate 5 away from the bottom surface of the lower cylinder 3, so that the air delivered by the fan 18 first forms a buffer chamber below the support plate 5 before rising; the circular placement plate 6 is flush with the top of the support plate 5, with an annular gap of uniform width between them; the airflow passes through this gap at a uniform speed and then diffuses upward, avoiding the generation of eddies or dead corners at the edge of the mosquito coil 7, ensuring that the combustion surfaces of each coil are exposed to the wind at the same time, and that the smoke generation rate remains consistent.

[0056] Please see Figures 1-5 As shown, as a technical optimization of this utility model, several legs 8 are fixed to the outer edge of the lower surface of each mosquito coil 7, and adjacent mosquito coils 7 are supported by the legs 8 to form a burning space with a constant spacing.

[0057] In this embodiment, the support leg 8 maintains a fixed interval between the upper and lower mosquito coil discs 7, the height of the combustion space remains unchanged, and the airflow can stably pass through each disc surface; the smoke generated by the burning mosquito coil rises along a constant interval, and will not cause local high temperature or extinguishing due to the discs sticking together, ensuring continuous and uniform smoke output.

[0058] Please see Figures 1-12 As shown, as a technical optimization of this utility model, the rotating conveying structure includes:

[0059] Gear 20, the gear 20 is fixed to a rotating column 19 that is vertically rotatably installed on the bottom wall of the lower cylinder 3, and the rotating column 19 is connected to the output shaft of the power source via a synchronous belt;

[0060] Rotating ring 9, which is rotatably fitted into the annular gap between the support disk 5 and the circular placement plate 6;

[0061] An internal gear ring 10 is coaxially fixed to the outer periphery of the rotating ring 9, and a protruding ring 12 extends from its outer wall. The protruding ring 12 is rotatably embedded in a corresponding limiting groove 14 opened on the inner wall of the lower cylinder 3. The internal gear ring 10 meshes with the gear 20 to transmit the rotational motion of the power source to the rotating ring 9.

[0062] At least two air supply pipes 11 are axially fixed to the upper surface of the rotating ring 9 and extend upward. Each air supply pipe 11 has a delivery port at a height position corresponding to each layer of mosquito coil 7, and the inner cavity of the air supply pipe 11 is connected to the annular cavity of the rotating ring 9, for rotating and spraying airflow onto each layer of the combustion surface.

[0063] In this embodiment, the power source drives the rotating column 19 and gear 20 to rotate at a constant speed via a synchronous belt. The gear 20 drives the internal gear ring 10 to make the rotating ring 9 rotate smoothly within the annular gap between the support plate 5 and the circular placement plate 6. The convex ring 12 is stuck by the limiting groove 14 to prevent the rotating ring 9 from moving up and down and to maintain coaxiality. The air supply pipe 11, which rotates together with the rotating ring 9, introduces the pressurized air entering from the bottom into the pipe and sprays it out laterally from the delivery port corresponding to the height of each layer of mosquito coil 7. The rotating air supply pipe 11 makes the sprayed airflow continuously sweep across the combustion surface of each coil in the circumference, which not only ensures uniform oxygen supply, but also carries away the newly generated smoke in time, maintaining a stable output of smoke concentration and flow rate.

[0064] Please see Figures 1-9 As shown, as a technical optimization of this utility model, the power source is a motor 17 installed on the bottom wall of the lower cylinder 3. The output shaft of the motor 17 extends into the lower cylinder 3 through a sealed bearing to drive the fan 18 and the rotating conveying structure to operate synchronously.

[0065] In this embodiment, the motor 17 is fixed on the lower cylinder 3 and is used to drive the fan 18 and the rotating conveyor structure at the same time. The motor 17 has a constant speed, and the fan 18 and the air supply pipe 11 operate synchronously, so that the air volume and the rotational spray frequency are always matched, ensuring that the burning speed of the mosquito coil and the smoke output are continuous and stable.

[0066] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0067] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A mosquito coil gas generating device for inhalation toxicity testing, comprising an upper cylinder (1), a lower cylinder (3) detachably connected to the upper cylinder (1), and a plurality of mosquito coil discs (7) vertically stacked within the upper cylinder (1) and the lower cylinder (3), characterized in that: The lower cylinder (3) is provided with an air supply mechanism, which includes: Fan (18), the fan (18) is fixed to the power source output end installed at the bottom of the lower cylinder (3), the power source is used to drive the fan (18) to rotate and blow air; A circular placement plate (6) is horizontally fixed to the inner cavity of the lower cylinder (3) to support the bottommost mosquito coil disc (7). A rotating conveying structure is arranged around the outer periphery of the circular placement plate (6) and rotates relative to the circular placement plate (6) to deliver the airflow blown out by the fan (18) in layers and evenly to the burning surface of each layer of the mosquito coil (7).

2. The mosquito smoke generator for inhalation toxicity testing according to claim 1, characterized in that: The mating end faces of the upper cylinder (1) and the lower cylinder (3) are provided with several buckles at equal intervals along the circumference, which are used to quickly lock or release the two. The upper cylinder (1) has a transparent observation window embedded in its axial wall for real-time observation of the burning status of the mosquito coil. The upper cylinder (1) is provided with an air outlet pipe (2) at the top.

3. The mosquito smoke generator for inhalation toxicity testing according to claim 1, characterized in that: The lower cylinder (3) is also provided with a sealing structure, the sealing structure including: The sealing ring (15) is rotatably fitted into the annular slot corresponding to the side wall of the lower cylinder (3). Both the slot and the sealing ring (15) are provided with ventilation holes. The effective ventilation area can be changed by rotating the sealing ring (15). Pushing blocks (16), several of the pushing blocks (16) are fixed to the outer wall of the sealing ring (15) in the circumferential direction and extend outward. The side wall of the lower cylinder (3) is provided with a sliding groove (13) for the pushing blocks (16) to slide, which is used to maintain the adjustment position of the sealing ring (15).

4. The mosquito smoke generator for inhalation toxicity testing according to claim 1, characterized in that: The bottom of the inner cavity of the lower cylinder (3) is fixed with a number of support blocks (4) in an annular array, and the top of each support block (4) is fixed with a support disk (5). The vertical cross section of the support disk (5) is L-shaped. The support plate (5) is coaxially fixed to the circular placement plate (6) by several connecting columns. The upper surface of the circular placement plate (6) is flush with the top horizontal annular surface of the support plate (5), and the outer diameter of the circular placement plate (6) is larger than the diameter of the central opening of the support plate (5) to form an annular gap for airflow.

5. The mosquito smoke generator for inhalation toxicity testing according to claim 1, characterized in that: Several legs (8) are fixed to the outer edge of the lower surface of each mosquito coil (7). The mosquito coils (7) of adjacent layers are supported by the legs (8) and form a burning space with a constant spacing.

6. The mosquito smoke generator for inhalation toxicity testing according to claim 4, characterized in that: The rotating conveying structure includes: Gear (20), the gear (20) is fixed to a rotating column (19) that is vertically rotatably installed on the bottom wall of the lower cylinder (3), the rotating column (19) is connected to the output shaft of the power source via a synchronous belt; Rotating ring (9), which is rotatably fitted into the annular gap between the support plate (5) and the circular placement plate (6); An internal gear ring (10) is coaxially fixed to the outer periphery of the rotating ring (9), and a convex ring (12) extends from its outer wall. The convex ring (12) is rotatably embedded in a corresponding limiting groove (14) opened on the inner wall of the lower cylinder (3). The internal gear ring (10) meshes with the gear (20) to transmit the rotational motion of the power source to the rotating ring (9). Air supply pipe (11), at least two of the air supply pipes (11) are axially fixed to the upper surface of the rotating ring (9) and extend upward. The air supply pipe (11) has a delivery port at the height position of each layer of mosquito coil (7), and the inner cavity of the air supply pipe (11) is connected to the annular cavity of the rotating ring (9) for rotating and spraying the airflow to each layer of the combustion surface.

7. The mosquito smoke generator for inhalation toxicity testing according to claim 1, characterized in that: The power source is a motor (17) installed on the bottom wall of the lower cylinder (3). The output shaft of the motor (17) extends into the lower cylinder (3) through a sealed bearing and is used to drive the fan (18) and the rotating conveying structure to operate synchronously.

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