Smoke backflow structure of smoke-free moxibustion appliance and moxibustion head assembly

Abstract

The utility model discloses a kind of smoke backflow structures of smoke purifying moxa moxa appliance, including inner shell, shell, steady flow shell and moxa fixed seat, and are equipped with moxa combustion chamber, moxa smoke purification chamber and backflow chamber, steady flow shell upper portion is equipped with the backflow port being linked with backflow chamber, steady flow shell is inserted with shunt piece, shunt piece is equipped with air inlet channel, and steady flow cavity is formed between shunt piece and steady flow shell, the top of steady flow cavity is equipped with the circulation inlet being linked with inner shell, bottom is equipped with exhaust port, and steady flow shell bottom is rotatably connected with adjusting cover, adjusting cover is equipped with air inlet and adjusting hole;The utility model also discloses a kind of moxa head assembly, including smoke backflow structure, and moxa smoke purification chamber is equipped with suction fan, secondary smoke filter block, primary filter module.The utility model is convenient to dismount and assemble, user can control moxa all backflow or partial backflow, ensure that smoke backflow circulation in order, obtain sufficient purification, reduce the influence of external environment change on moxa combustion and smoke backflow, improve user experience.

Description

Technical Field

[0001] This utility model belongs to the field of physiotherapy device technology, specifically relating to a smoke recirculation structure and moxibustion head assembly of a smoke-removing moxibustion device. Background Technology

[0002] Moxibustion is a traditional Chinese medicine therapy that uses burning moxa sticks to stimulate the flow of Qi (vital energy) and regulate disordered physiological and biochemical functions in the body, thereby achieving the purpose of preventing and treating diseases. However, the smoke emitted by burning moxa sticks diffuses into the environment and adheres to the skin and clothing, reducing the user experience. At the same time, the smoke produced by moxibustion can irritate the throat, and the longer the moxibustion time, the higher the concentration of moxa smoke, which can affect the user's health to some extent.

[0003] In order to control moxibustion smoke and improve user experience, patent CN216091427U discloses a smokeless moxibustion device, including a moxibustion device body, a movable rod, a moxibustion head, a locking structure and an adjustment structure. By adjusting the angle formed between the first movable plate and the second movable plate, the purpose of adjusting or even blocking the moxibustion smoke from the moxibustion head can be achieved. It realizes the adjustment of the amount of smoke according to the different users' tolerance to moxibustion smoke, but does not substantially treat the moxibustion smoke.

[0004] With the deepening research on smokeless moxibustion devices, the concepts of "internal circulation" and "internal and external circulation" smoke purification have been proposed in this field. The applicant has conducted relevant research and testing, and applied for patents with publication numbers CN215996014U and CN215996134U, disclosing a smoke filtration structure. This structure creates a return airflow space by maintaining a certain distance between the inner cylinder and the outer casing. This return airflow space and the internal space of the inner cylinder form a circulating airflow loop. A smoke-filtering mechanism and a fan are installed on this loop to absorb and remove the smoke and odors released from the burning moxibustion material during the airflow circulation filtration. However, the airflow direction at the outlet of the return airflow space is different from the inlet direction, which is not conducive to the re-entry of smoke into the circulating airflow loop. Furthermore, the open port is greatly affected by the environment, and turbulent airflow can affect the return and escape of smoke, causing instability in the smoke circulation filtration. To address this issue, the applicant filed a patent application with publication number CN222265732U, which adds a flow divider between the air inlet at the bottom of the inner shell and the air vent at the bottom of the outer shell. This flow divider guides the incoming, outgoing, and returning gas, reducing airflow turbulence and improving the stability of smoke recirculation and moxibustion temperature control. In this patent, the gradually narrowing inner diameter of the outer shell forms a sidewall that guides the airflow. However, the small lower port requires specialized tools for disassembly, assembly, and adjustment of the flow divider ring and the first lower shell, making operation inconvenient. Increasing the inner diameter of the lower port would affect smoke flow; without changing the shape of the outer shell's bottom, disassembly, assembly, and alignment would be inconvenient for users when replacing moxibustion consumables. Utility Model Content

[0005] To better achieve smoke recirculation, the present invention aims to provide a smoke recirculation structure for a smoke-purifying moxibustion device. By setting a flow stabilizing shell, a flow divider, and an adjusting cover, the smoke can be orderly recirculated in its entirety or partially, ensuring the relative stability of the air intake and smoke recirculation within the moxibustion shell, and facilitating installation and adjustment. To improve the smoke purification effect, the present invention also provides a moxibustion head assembly for the smoke-purifying moxibustion device.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A smoke recirculation structure for a smoke-purifying moxibustion device includes an inner shell and an outer shell with an open bottom. The inner shell has a combustion chamber for moxibustion materials and a smoke purification chamber. An air vent is located at the top of the inner shell. The inner shell and the outer shell enclose each other to form a recirculation chamber. A flow-stabilizing shell is installed at the bottom of the outer shell. The upper port of the flow-stabilizing shell is inserted into the bottom of the inner shell, and a moxibustion material fixing seat is installed at the upper port of the flow-stabilizing shell. A recirculation port communicating with the recirculation chamber is located at the top of the flow-stabilizing shell. A flow-diverting component is coaxially inserted into the flow-stabilizing shell. The flow-diverting component has a through-flow air inlet channel along its longitudinal direction. A ring-shaped flow-stabilizing cavity is formed between the flow-stabilizing shell and the flow-stabilizing housing. The top of the flow-stabilizing cavity is provided with a circulation inlet that connects to the inner shell, and the bottom of the flow-stabilizing cavity is provided with several exhaust ports. The outer side wall of the flow-dividing component has an upper guide surface for introducing airflow into the circulation inlet and a lower guide surface for discharging airflow to the exhaust ports. An adjusting cover is rotatably connected to the bottom of the flow-stabilizing shell. The adjusting cover is in contact with the bottom surface of the flow-dividing component. The adjusting cover is provided with an air inlet corresponding to the air inlet channel and an adjusting hole corresponding to the exhaust port. The adjusting cover can be rotated to open / close the exhaust port.

[0008] Preferably, in order to increase the orderliness of the airflow in the recirculation chamber, a spiral guide plate for guiding airflow into the recirculation port is provided between the outer shell and the inner shell.

[0009] Preferably, in order to prevent the ash from falling and burning the skin, the top of the diverter is connected to a ash-blocking net, and the moxibustion material fixing seat is fixed to the ash-blocking net.

[0010] Preferably, in order to facilitate the installation and connection between the flow stabilizer housing and the inner housing, outer housing, flow divider and adjustment cover, the flow stabilizer housing includes a mounting part, an expansion part and an extension part coaxially connected from bottom to top. The mounting part is used to install the flow divider and adjustment cover, and the flow divider can be inserted into the flow stabilizer housing from the mounting part. The expansion part is installed at the lower port of the outer housing, and the extension part is inserted into the bottom of the inner housing.

[0011] Furthermore, in order to make the gas flow velocity in the flow stabilizing cavity as uniform as possible and reduce the airflow resistance caused by the structure, the upper and lower inner walls of the expansion section are both arc-shaped, the inner diameter of the expansion section is larger than the inner diameter of the mounting section, and the inner diameter of the mounting section is not smaller than the inner diameter of the extension section.

[0012] Preferably, in order to better utilize the diverter to guide the air intake at the bottom of the moxibustion shell, the return air in the stabilizing chamber, and the exhaust air, the diverter includes a rotating body and a support plate connected to the bottom of the rotating body. The air intake channel passes through the rotating body and the support plate along the axial center line. The rotating body has an upper guide surface and a lower guide surface. The outer diameter of the top of the rotating body is smaller than the inner diameter of the extension to form the circulation inlet. The exhaust port is provided through the support plate along the circumferential direction.

[0013] Furthermore, to ensure smooth airflow into the bottom of the inner shell, the air intake channel is cylindrical, frustum-shaped, or quasi-frustum-shaped, wherein the quasi-frustum-shaped channel has a lower diameter larger than the upper diameter and an arc-shaped side surface. To reduce airflow resistance caused by the structure, the outer diameter of the upper guide surface of the rotating body gradually increases from top to bottom, and the outer diameter of the lower guide surface of the rotating body gradually decreases from top to bottom, and both the upper and lower guide surfaces are smooth annular arc surfaces.

[0014] A moxibustion head assembly for a smoke-purifying moxibustion device includes the aforementioned smoke recirculation structure. The smoke purification chamber is equipped with an exhaust fan, a secondary smoke filter block, and a primary filter module, arranged sequentially from top to bottom. The inner shell is provided with a support member for receiving the moxibustion material.

[0015] In the prior art, although the cost of primary filter blocks is low, they are replaced every time along with consumables, which increases the user's maintenance costs over long-term use. In order to improve the service life of the primary filter material, the primary filter module includes an upper ring, a lower ring, a connecting mesh, and a filter material. The upper ring is fitted onto a support member, and the outer diameter of the upper ring is smaller than the inner diameter of the inner shell. The lower ring abuts against the inner sidewall of the inner shell, and the inner diameter of the lower ring is larger than the outer diameter of the support member. The connecting mesh connects the upper and lower rings. The filter material is folded and surrounds the connecting mesh to form a cylindrical shape.

[0016] Furthermore, in order to improve the intelligence and therapeutic effect of the smoke-free moxibustion device, a distance sensor, a temperature sensor and / or a therapeutic lamp are installed in the moxibustion head assembly. The distance sensor is used to detect the distance between the moxibustion head assembly and the recipient, and the temperature sensor is used to sense the surface temperature of the recipient's moxibustion site.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] The flue gas recirculation structure consists of a flow stabilizer, a flow divider, and an adjustment cover at the bottom of the inner and outer shells. The flow divider has an intake channel along its axial centerline, allowing outside air to enter the combustion chamber of the moxibustion material. During this process, the air does not encounter opposing airflow, ensuring a stable flow into the inner shell to maintain the combustion of the moxibustion material and maintain a relatively stable combustion degree. Simultaneously, the outer wall of the flow divider and the inner wall of the flow stabilizer form a ring-shaped flow stabilizer cavity. The top of the flow stabilizer cavity forms a circulation inlet through the gap between the top of the flow divider and the flow stabilizer, while the bottom of the flow stabilizer cavity connects to the outside through an exhaust port on the flow divider. The smoke generated by the combustion of the moxibustion material passes through the smoke purification chamber and... In the reflux chamber, under the guidance of the spiral guide plate, the airflow enters the stabilizing chamber through the reflux port. When the adjusting cover is rotated so that the adjusting hole and the exhaust port do not overlap, that is, the exhaust port is closed, under the influence of the exhaust fan and the air pressure inside the chamber, the airflow in the stabilizing chamber follows the upper guide surface and enters the inner shell through the circulation inlet, realizing the complete circulation of moxa smoke. When the adjusting cover is rotated so that the adjusting hole and the exhaust port overlap, that is, the exhaust port is opened, the airflow in the upper part of the stabilizing chamber follows the upper guide surface and enters the inner shell through the circulation inlet, while the airflow in the lower part of the stabilizing chamber follows the lower guide surface and exits through the exhaust port, thus completing part of the internal circulation and part of the external discharge of moxa smoke, providing a structural basis for the experimental research on smoke circulation of smokeless moxibustion.

[0019] This invention, by adopting the above-mentioned structure, avoids the airflow turbulence caused by the unified air inlet and outlet in the prior art, and helps to maintain a relatively stable air intake. Users can choose to allow all or part of the moxa smoke to be recirculated based on the amount of smoke produced by the burning moxa, ensuring orderly recirculation and thorough purification of the smoke, thereby reducing the impact of external environmental changes on the combustion of moxa and the recirculation of smoke. Before and after use, users only need to open the adjustment cover and remove the moxa fixing seat from the lower port of the flow stabilizer along with the diverter to place and replace the moxa and clean the ash; disassembly and assembly are convenient. The pre-filter module adopts a conical shape with a folded filter media section, resulting in a large contact surface area with the smoke and dust, which does not generate excessive resistance to airflow. It can efficiently remove large particles of smoke and dust and is not easily clogged. Compared with filter cotton, it reduces the number of filter material replacements and improves the user experience. Attached Figure Description

[0020] Figure 1 This is a cross-sectional schematic diagram of the flue gas recirculation structure described in Example 1;

[0021] Figure 2 yes Figure 1 Enlarged view of the central flow stabilizer shell, flow divider, adjusting cover, fixing rod, dust baffle and moxibustion material fixing seat;

[0022] Figure 3 yes Figure 2 Exploded view;

[0023] Figure 4 yes Figure 3 Enlarged view of the central fixed rod;

[0024] Figure 5 This is a half-sectional schematic diagram of the flow stabilizing shell, flow splitter, adjusting cover, dust baffle and moxibustion material fixing seat described in Example 2;

[0025] Figure 6 This is a cross-sectional schematic diagram of the moxibustion head assembly described in Example 3;

[0026] Figure 7 yes Figure 6 A schematic diagram of the structure of the primary filter template.

[0027] Figures 1-7 In the accompanying drawings, the reference numerals are as follows: 1. Inner shell; 101. First upper shell; 102. First lower shell; 103. Support plate; 104. Air passage; 105. Vent; 2. Moxibustion material fixing seat; 3. Flow stabilizing shell; 301. Extension; 302. Enlarged diameter; 303. Mounting part; 304. Return port; 4. Flow divider; 401. Rotating body; 4011. Upper guide surface; 4012. Lower guide surface; 4013. Air inlet channel; 402. Support plate; 403. Exhaust port; 5. Flow stabilizing cavity; 6. Adjusting cover; 601. Air inlet; 602. Adjusting hole; 603. Elongated hole; 604. Base plate; 605. Ring plate; 606. Slot; 7. Ash baffle; 8. 801. Outer shell; 802. Second lower shell; 9. Connecting bracket; 10. Spiral guide plate; 11. Fixing rod; 1101. Handle; 1102. Smooth rod; 1103. Threaded rod; 12. Exhaust fan; 13. Secondary filter block; 14. Primary filter module; 1401. Upper ring; 1402. Lower ring; 1403. Filter media; 1404. Sealing ring; 15. Support; 16. Cover; 17. Connecting shell; 18. Control and processing module; 19. Moxibustion column. Detailed Implementation

[0028] To make the technical objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solutions of this utility model will be further described below in conjunction with specific embodiments and accompanying drawings. However, the embodiments are intended to explain this utility model and should not be construed as limiting this utility model. Where specific technologies or conditions are not specified in the embodiments, they shall be carried out in accordance with the technologies or conditions described in the literature in this field or in accordance with the product manual. Example

[0029] A smoke recirculation structure for smoke-reducing moxibustion devices, such as Figures 1-4As shown, the device includes a coaxially arranged outer shell 8 and inner shell 1. The outer shell 8 is assembled from a second upper shell portion 801 and a second lower shell portion 802. The upper part of the second upper shell portion 801 is spherical, and the second lower shell portion 802 is cylindrical. Both the upper and lower ends of the second lower shell portion 802 are open. The bottom of the second upper shell portion 801 and the top of the second lower shell portion 802 are fastened together by fasteners. A connecting bracket 9 is provided inside the second lower shell portion 802, and the connecting bracket 9 is located in the middle of the inner cavity of the outer shell 8. The connecting bracket 9 does not affect the smooth airflow in the inner cavity of the outer shell 8. A cylindrical mounting hole is provided at the center of the connecting bracket 9. This mounting hole is used to support the inner shell 1 and limit the inner shell 1. The inner shell 1 is assembled from a first upper shell 101 and a first lower shell 102. The top of the first upper shell 101 is provided with a vent 105. The lower part of the first upper shell 101 is open, and the bottom of the first upper shell 101 is inserted into the top of the first lower shell 102. The upper part of the first lower shell 102 is inserted into the connecting bracket 9. The bottom of the first lower shell 102 is open, and the lower port of the first lower shell 102 is located above the lower port of the second lower shell 802. A support plate 103 is provided inside the first lower shell 102, and the support plate 103 is located in the upper part of the inner cavity of the first lower shell 102. The support plate 103 is provided with an air vent 104, and the first lower shell 102 is connected to the first upper shell 101 through the air vent 104. The inner shell 1 has a combustion chamber for moxibustion materials, a primary filtration chamber for moxa smoke, and a secondary purification chamber (the moxa smoke purification chamber is divided into a primary filtration chamber and a secondary purification chamber) arranged sequentially from bottom to top. Specifically, the lower part of the inner cavity of the first lower shell 102 is the combustion chamber for moxibustion materials, the upper part of the inner cavity of the first lower shell 102 is the primary filtration chamber for moxa smoke, and the inner cavity of the first upper shell 101 is the secondary purification chamber. The inner shell 1 and the outer shell 8 enclose a reflux chamber.

[0030] A flow stabilizing shell 3 is installed at the bottom of the second lower shell portion 802. The flow stabilizing shell 3 includes an extension portion 301, an enlarged diameter portion 302, and a mounting portion 303 connected coaxially from top to bottom. Both the extension portion 301 and the mounting portion 303 are cylindrical. The outer diameter of the extension portion 301 is adapted to the inner diameter of the first lower shell portion 102, and the extension portion 301 is coaxially inserted into the bottom of the first lower shell portion 102. The inner diameter of the mounting portion 303 is larger than the inner diameter of the extension portion 301 to facilitate the insertion and installation of subsequent components. The enlarged diameter portion 302 is detachable. Installed in the second lower shell 802, the installation method can be fastener installation, threaded connection, or snap-fit ​​fixation (conventional techniques in the art are acceptable, with fastener installation being preferred). The upper part of the expanded diameter part 302 is located inside the second lower shell 802, and the lower part of the expanded diameter part 302 extends out of the second lower shell 802. The inner diameter of the expanded diameter part 302 is larger than the outer diameter of the bottom of the first lower shell 102. To reduce airflow resistance caused by the structure, the cross-section of the expanded diameter part 302 is circular, and the upper and lower inner sidewalls of the expanded diameter part 302 are arc surfaces. The upper part of the expanded diameter part 302 is provided with a return port 304 communicating with the return chamber (the return port 304 is located on the left side of the flow stabilizing shell 3). A spiral guide plate 10 for introducing airflow into the return port 304 is provided inside the second lower shell 802, and the spiral guide plate 10 is located between the outer shell 8 and the inner shell 1.

[0031] A flow divider 4 is coaxially inserted into the flow stabilizer housing 3. The flow divider 4 includes a rotating body 401 and a support plate 402 coaxially connected to the bottom of the rotating body 401. The support plate 402 is coaxially mounted at the mounting part 303. The connection between the support plate 402 and the mounting part 303 can be achieved by insertion, snap-fit, or threaded connection (conventional techniques in the art are acceptable, with insertion being preferred). The flow divider 4 has an air intake channel 4013 along its axial centerline. The axial centerline of the air intake channel 4013 coincides with the axial centerline of the first lower housing 102. The air intake channel 4013 penetrates the rotating body 401 and the support plate 402. To ensure smooth airflow into the bottom of the first lower housing 102, the air intake channel 4013 is shaped like a frustum, where the lower diameter is larger than the upper diameter and the side surface is curved. The flow divider 4 and the flow stabilizer 3 enclose each other to form a ring-shaped flow stabilizer cavity 5. The outer diameter of the top of the rotating body part 401 is smaller than the inner diameter of the extension part 301. The distance between the top of the rotating body part 401 and the top of the expansion part 302 forms a circulation inlet. The flow stabilizer cavity 5 is connected to the first lower shell part 102 through the circulation inlet. Several exhaust ports 403 are evenly spaced along the circumferential direction on the support plate part 402. The gas in the flow stabilizer cavity 5 can be discharged through the exhaust ports 403. The outer wall of the rotating body part 401 has an upper guide surface 4011 that guides the flow to the circulation inlet and a lower guide surface 4012 that guides the flow to the exhaust port 403. The outer diameter of the upper guide surface 4011 of the rotating body part 401 gradually increases from top to bottom, and the outer diameter of the lower guide surface 4012 of the rotating body part 401 gradually decreases from top to bottom. Both the upper guide surface 4011 and the lower guide surface 4012 are smooth annular concave arc surfaces. The outer diameter of the rotating body part 401 at the junction of the upper guide surface 4011 and the lower guide surface 4012 must be greater than the inner diameter of the first lower shell part 102 and not greater than the inner diameter of the mounting part 303. The top of the diverter 4 is connected to a dust-blocking mesh 7 (the diverter 4 and the dust-blocking mesh 7 can be fixed by top connection, snap-fit, or welding). A moxibustion material fixing seat 2 is fixed on the dust-blocking mesh 7 (the dust-blocking mesh 7 and the moxibustion material fixing seat 2 can be fixed by winding a metal wire or hooking an iron sheet, or they can be directly welded). The bottom of the moxibustion material fixing seat 2 is hollowed out. The upper diameter of the air intake channel 4013 is larger than the diameter of the moxibustion material fixing seat 2 to meet the oxygen intake requirements of the bottom surface of the moxibustion material and the combustion chamber of the moxibustion material.

[0032] The bottom of the flow stabilizer 3 is rotatably connected to an adjustment cover 6, which covers the lower port of the mounting part 303. The adjustment cover 6 includes a base plate 604, and an annular plate 605 extends upward from the outer edge of the base plate 604. The base plate 604 is in contact with the bottom surface of the support plate 402. An air inlet 601 corresponding to the air inlet channel 4013 is provided at the center of the base plate 604. The diameter of the air inlet 601 is the same as the diameter of the bottom of the air inlet channel 4013. An adjustment hole 602 corresponding to the exhaust port 403 is provided on the base plate 604. The number and spacing of the adjustment holes 602 and the exhaust ports 403 are arranged in a one-to-one correspondence, and the size of the adjustment holes 602 and the exhaust ports 403 are the same. The annular plate portion 605 has elongated holes 605 on both its front and rear sides along the transverse direction. The mounting portion 303 has fixing rods 11 fastened to its front and rear sides. The fixing rods 11 include a threaded rod portion 1103, a smooth rod portion 1102, and a handle portion 1101 connected in sequence. The fixing rods 11 pass through the elongated holes 605 from the outside to the inside along the transverse direction and are installed in the mounting portion 303 through the threaded rod portion 1103. The smooth rod portion 1102 is located inside the elongated hole 605. The fixing rods 11 support the adjusting cover 6, and the adjusting cover 6 rotates by sliding relative to the smooth rod portion 1102 through the elongated hole 605. By rotating, the adjusting cover 6 can control the overlap area between the exhaust port 403 and the adjusting hole 602, thereby realizing the opening / closing of the exhaust port 403. Example

[0033] A smoke recirculation structure for a smoke-reducing moxibustion device includes the inner shell 1, moxibustion material fixing seat 2, flow stabilizing shell 3, flow divider 4, adjusting cover 6, ash-blocking mesh 7, outer shell 8, connecting bracket 9, and spiral guide plate 10 described in Example 1. The difference lies in the change of the connection between the flow stabilizing shell 3 and the adjusting cover 4. Figure 5 As shown, the adjusting cover 6 includes an annular plate portion 605, which is rotatably connected to a base plate portion 604. The position of the base plate portion 604, the air inlet 601, and the adjusting hole 602 are the same as in Embodiment 1. The mounting portion 303 is provided with a snap-fit ​​protrusion, and the annular plate portion 604 is provided with a snap-fit ​​groove 606 through which the snap-fit ​​protrusion passes. The snap-fit ​​groove 606 is right-angled, and the adjusting cover 6 is snap-fitted and installed with the flow stabilizer shell 3 through the snap-fit ​​groove 606.

[0034] The flue gas recirculation structure described in Examples 1 and 2, when used with moxibustion devices or during related experimental research (equipped with an exhaust fan to provide axial flow), involves placing the moxibustion material on the moxibustion material fixing seat 2, igniting the bottom surface of the moxibustion material, and drawing external air into the first lower shell 102 through the air inlet 601 and air inlet channel 4013 to maintain the combustion of the moxibustion material. The flue gas generated by the combustion of the moxibustion material passes through the primary smoke filtration chamber and the air passage 104, enters the secondary purification chamber, and then enters the recirculation chamber through the air vent 105 and flows downward. Under the guidance of the spiral guide plate 10, the flue gas enters the stabilizing chamber 5 from the recirculation port 304 along an oblique direction and fills the stabilizing chamber 5; rotating the adjustment cover 6... The regulating hole 602 is positioned between two adjacent exhaust ports 403 (i.e., the regulating hole 602 and the exhaust port 403 do not overlap at all). Under the influence of wind force and air pressure, the flue gas in the flow stabilizing cavity 5 enters the first lower shell 102 through the circulation inlet, completing the entire internal circulation of the flue gas. The regulating cover 6 is rotated so that the regulating hole 602 overlaps with the exhaust port 403. Under the influence of wind force and air pressure, the airflow in the upper part of the flow stabilizing cavity 5 flows along the upper guide surface 4011 and enters the first lower shell 102 through the circulation inlet, while the airflow in the lower part of the flow stabilizing cavity 5 flows along the lower guide surface 4012 and exits through the exhaust port 403 and the regulating hole 602, thereby completing part of the internal circulation and part of the external discharge of the flue gas. Example

[0035] A moxibustion head assembly for a smoke-free moxibustion device, such as Figures 1-7 As shown, the flue gas recirculation structure includes that described in Embodiment 1 or Embodiment 2. A support member 15 is provided inside the first lower shell portion 102 for downwardly pressing against the moxibustion material 19. The top of the support member 15 is securely installed at the center of the bottom surface of the support plate portion 103. The support member 15 adopts the structure of the support member in the patent application number CN202420452387.3, or other conventional technical means of the prior art can also be used; therefore, the structure of the support member 15 will not be described in detail in this application. The moxibustion material fixing seat 2 is cylindrical, and the moxibustion material 19 is placed inside the moxibustion material fixing seat 2, with the support member 15 abutting against the top of the moxibustion material 19.

[0036] The primary filter chamber of the moxa smoke contains a primary filter module 14, which includes an upper ring portion 1401, a lower ring portion 1402, a connecting mesh portion (not shown in the figure for clarity of the filter material portion), and a filter material portion 1403. The upper ring portion 1401 is fitted onto a support member 15. The outer diameter of the upper ring portion 1401 is smaller than the inner diameter of the first lower shell portion 102. The inner diameter of the upper ring portion 1401 and the support member 15 are in clearance fit to facilitate the fitting of the primary filter module 14 onto the support member 15. At the same time, to prevent the primary filter module 14 from slipping and to ensure a tight fit on the support member 15, a sealing ring 1404 is embedded in the inner side of the upper ring portion 1401. The inner side of the sealing ring 1404 abuts against the outer side of the support member 15. The lower ring portion 1402 abuts against the inner wall of the first lower shell portion 102. The inner diameter of the lower ring portion 1402 is larger than the outer diameter of the support member 15. The connecting mesh section connects the upper ring section 1401 and the lower ring section 1402, and the connecting mesh section is conical. The filter material section 1403 is folded, and the filter material section 1403 surrounds the connecting mesh section to form a conical shape (i.e., the connecting mesh section is located inside the primary filtration module 14, and the filter material section 1403 is located outside the connecting mesh section). The secondary purification chamber is filled with secondary smoke filter blocks 13, and an exhaust fan 12 is installed at the vent 105. The filter material section 1403 can be a HEPA filter or other temperature-appropriate fiber filter cloth, and the secondary smoke filter blocks 13 can be filter cotton, smoke-purifying fillers, or other filter media. For those skilled in the art, the materials of other components can be conventionally selected from existing materials.

[0037] Furthermore, to improve the intelligence and therapeutic effect of the smoke-free moxibustion device, a distance sensor, a temperature sensor, a therapeutic lamp, a control display screen, and a control processing module 18 have been added. To facilitate installation and conceal the wiring for electrical connection, a cover 16 is provided on the outer shell 8, and a connecting shell 17 is installed on the rear side of the cover 16. The distance sensor, temperature sensor, and therapeutic lamp are all installed at the bottom of the cover 16, and the control processing module 18 is installed inside the connecting shell 17. The distance sensor is used to detect the distance between the moxibustion head assembly and the recipient. The temperature sensor is used to sense the surface temperature of the recipient's moxibustion site. The therapy lamp can emit red or blue light to assist moxibustion in exerting its therapeutic effect. The distance sensor, temperature sensor, therapy lamp, control display screen, and exhaust fan 12 are all electrically connected to the control processing module. The control processing module 18 receives control signals from the control display screen, detection data from the temperature and distance sensors, and performs corresponding control according to the set program. The control processing module 18 also controls the start and stop of the exhaust fan 12. The distance sensor, temperature sensor, therapy lamp, and control display screen can all be ordinary commercially available products. The control processing module 18 and its set program can use conventional technology from the prior art and are not the innovation of this utility model, so they will not be described in detail.

[0038] To achieve intelligent control, the moxibustion head assembly typically requires a camera module for scanning and acquiring image information of the recipient, as well as a robotic arm for precisely controlling the movement of the moxibustion head assembly. When using the moxibustion head assembly, the recipient's treatment area and temperature are set via a control display screen. After the camera module acquires and determines the coordinates of the treatment area, the moxa stick 19 is ignited, the exhaust fan 14 is turned on, and the robotic arm moves the moxibustion head assembly. Under real-time detection by a distance sensor, the assembly is positioned at the treatment area. Then, feedback data from a temperature sensor is used to adjust the moxibustion head assembly until the surface temperature of the treatment area reaches the set temperature, allowing moxibustion to be applied according to the treatment plan. Under normal circumstances, at the beginning of moxibustion, when the moxa material 19 is just lit, the amount of smoke produced is relatively small. The adjusting cover 6 is rotated to close the exhaust port 403. The smoke produced by the burning moxa material is filtered by the primary filter module to remove particulate matter, and then purified again by the secondary smoke filter block 13 before entering the reflux chamber. It is then guided by the spiral guide plate 9 into the stabilizing chamber 5, and then re-enters the inner shell 1 from the circulation inlet (both sides of the moxa material 19). At the same time, air is in contact with the bottom surface of the moxa material 19 through the air intake channel 4013 to maintain combustion, and the internal circulation and oxygen intake can reach a balance. As the flame stabilizes and the moxibustion temperature rises, organic matter decomposes and oxidizes rapidly at high temperature, and the oxygen consumption rises rapidly (complete combustion can reduce harmful components in the smoke). The adjusting cover 6 is rotated to open the exhaust port 403. Part of the gas in the stabilizing chamber 5 re-enters the inner shell 1 from the circulation inlet, and part of it is discharged through the exhaust port 403. Since the amount of smoke produced by moxa is affected by various factors such as the dryness, purity, size of the moxa material, and the material, hardness, or density of the rolling paper, the specific timing for adjustment can be determined during application.

[0039] Therefore, those skilled in the art should recognize that this application aims to provide a smoke recirculation structure that enables the orderly recirculation of all or part of the smoke, as well as a moxibustion head assembly containing such a smoke recirculation structure. Although several exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from its spirit and scope. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A smoke recirculation structure for a smoke-purifying moxibustion device, comprising an inner shell with an open bottom and an outer shell, wherein the inner cavity of the inner shell is provided with a moxibustion material combustion chamber and a smoke purification chamber, and the top of the inner shell is provided with a vent, and the inner shell and the outer shell are enclosed to form a recirculation chamber; characterized in that: A flow stabilizer shell is installed at the bottom of the outer shell. The upper port of the flow stabilizer shell is inserted into the bottom of the inner shell, and a moxibustion material fixing seat is installed at the upper port of the flow stabilizer shell. The upper part of the flow stabilizer shell has a return port connected to the return chamber. A flow divider is coaxially inserted inside the flow stabilizer shell. The flow divider has a through air intake channel along the longitudinal direction. The flow divider and the flow stabilizer shell enclose a ring-shaped flow stabilizer cavity. The top of the flow stabilizer cavity has a circulation inlet connected to the inner shell, and the bottom of the flow stabilizer cavity has several exhaust ports. The outer side wall of the flow divider has an upper guide surface for introducing airflow into the circulation inlet and a lower guide surface for discharging airflow to the exhaust ports. An adjustment cover is rotatably connected to the bottom of the flow stabilizer shell. The adjustment cover is in contact with the bottom surface of the flow divider. The adjustment cover has an air intake port corresponding to the air intake channel and an adjustment hole corresponding to the exhaust port. The adjustment cover can be rotated to open / close the exhaust port.

2. The smoke recirculation structure of the smoke-removing moxibustion device according to claim 1, characterized in that: A spiral guide plate is provided between the outer shell and the inner shell for introducing airflow into the return port.

3. The smoke recirculation structure of the smoke-removing moxibustion device according to claim 1, characterized in that: The top of the diverter is connected to a dust-blocking net, and the moxibustion material fixing seat is fixed to the dust-blocking net.

4. The smoke recirculation structure of the smoke-removing moxibustion device according to claim 1, characterized in that: The flow stabilizer housing includes a mounting section, an expansion section, and an extension section coaxially connected from bottom to top. The mounting section is used to install a flow divider and an adjustment cover, and the flow divider can be inserted into the flow stabilizer housing from the mounting section. The expansion section is installed at the lower port of the outer shell, and the extension section is inserted into the bottom of the inner shell.

5. The smoke recirculation structure of the smoke-removing moxibustion device according to claim 4, characterized in that: The upper and lower inner walls of the expanded diameter section are both arc-shaped. The inner diameter of the expanded diameter section is larger than the inner diameter of the mounting section, and the inner diameter of the mounting section is not smaller than the inner diameter of the extension section.

6. The smoke recirculation structure of the smoke-removing moxibustion device according to claim 4, characterized in that: The diverter includes a rotating body and a support plate connected to the bottom of the rotating body. The air intake channel passes through the rotating body and the support plate along the axial center line. The rotating body has an upper guide surface and a lower guide surface. The outer diameter of the top of the rotating body is smaller than the inner diameter of the extension to form the circulation inlet. The exhaust port is provided through the support plate along the circumferential direction.

7. The smoke recirculation structure of the smoke-removing moxibustion device according to claim 6, characterized in that: The air intake channel is cylindrical, frustum-shaped, or quasi-frustum-shaped. The outer diameter of the upper guide surface of the rotating body gradually increases from top to bottom, and the outer diameter of the lower guide surface of the rotating body gradually decreases from top to bottom. Both the upper and lower guide surfaces are smooth annular arc surfaces.

8. A moxibustion head assembly for a smoke-reducing moxibustion device, comprising the smoke recirculation structure as described in any one of claims 1 to 7, characterized in that: The smoke purification chamber is equipped with an exhaust fan, a secondary smoke filter block, and a primary filter module from top to bottom. The inner shell is equipped with a support for receiving the moxibustion material.

9. The moxibustion head assembly of the smoke-free moxibustion device according to claim 8, characterized in that: The primary filtration module includes an upper ring, a lower ring, a connecting mesh, and a filter media. The upper ring is fitted onto a support member, and the outer diameter of the upper ring is smaller than the inner diameter of the inner shell. The lower ring abuts against the inner wall of the inner shell, and the inner diameter of the lower ring is larger than the outer diameter of the support member. The connecting mesh connects the upper and lower rings. The filter media is folded and surrounds the connecting mesh to form a cylindrical shape.

10. The moxibustion head assembly of the smoke-free moxibustion device according to claim 8 or 9, characterized in that: The device is equipped with a distance sensor, a temperature sensor, and / or a therapeutic lamp. The distance sensor is used to detect the distance between the moxibustion head assembly and the recipient, and the temperature sensor is used to sense the surface temperature of the recipient's treatment area.

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