Aerosol-generating device
Patent Information
- Application Number
- CN202521847912.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-28
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2035-08-28
AI Technical Summary
[0004]然而,在气溶胶生成装置正常的工作过程中,如果盖体因振动、误触或机械故障意外开启,而加热腔仍然持续工作,会导致加热腔内部的高温气体瞬间逸出
[0027] In this invention, when the cover is in the first closed state, the support member extends at least partially into the heating chamber, thereby supporting the aerosol-generated product. The support member is detachably connected to the cover. Users can easily clean condensate and residues by opening the cover and removing the support member, without needing special tools or cleaning the cover itself. Furthermore, replacing the support member directly does not damage the cover, making the operation simple, convenient, and cost-effective. Further, the detection element works in conjunction with the sensor, with the detection element fixed to the cover and the sensor fixed to the main body. When the cover switches from the first state to the second state, the parameters of the detection element relative to the sensor change significantly. These parameters can be physical parameters, such as force or magnetic parameters. Based on these parameter changes, a corresponding sensing signal is generated. This sensing signal can be a voltage or current signal and is transmitted to the controller. Upon receiving the sensing signal, the controller stops the heating component, immediately shutting off the heating function. When the cover is accidentally opened due to vibration or user touch, i.e., when the first state is deactivated, the controller can immediately shut down the heating component, thereby preventing the continuous generation of high-temperature gas inside and its escape through the opening, which could even burn the user and improve safety.
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Figure CN224722729U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aerosol generation technology, and in particular to an aerosol generation device. Background Technology
[0002] Aerosol generating devices typically use a heating-non-combustion method to heat the aerosol generating product and generate aerosol.
[0003] Aerosol generating products are typically placed inside a heating chamber and continuously heated. Since these products are consumables, they are usually replaced after complete use. During replacement, the user needs to open the cover, insert a new aerosol generating product into the heating chamber, and thus achieve cyclical use.
[0004] However, during normal operation of the aerosol generator, if the cover is accidentally opened due to vibration, accidental contact, or mechanical failure, while the heating chamber continues to operate, the high-temperature gas inside the heating chamber will escape instantaneously. The temperature of this gas can typically reach 200℃ to 300℃. Given the nature of aerosol generators, where the user's face is usually close to the device, the high-temperature gas could directly contact the skin or respiratory tract, potentially causing burns or respiratory damage, posing a significant safety risk. Utility Model Content
[0005] The purpose of this invention is to provide an aerosol generating device that can prevent high-temperature gas from escaping and burning the user even if the cover is accidentally opened, thus improving the safety of use.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] Aerosol generating apparatus, comprising:
[0008] ontology;
[0009] A heating assembly having a heating chamber for accommodating an aerosol-generating article, one end of which forms an opening for the aerosol-generating article to pass through;
[0010] The cover has a first state in which the opening is closed and a second state in which the opening is open;
[0011] A support member is provided on the cover; when the cover is in the first state, the support member extends at least partially into the heating chamber and is used to support the aerosol-generated product;
[0012] The detection element is located on the cover.
[0013] Both the sensor and the controller are located on the main body, and the sensor and the heating assembly are respectively connected to the controller via signal connections; wherein...
[0014] When the cover is released from the first state, the sensor receives the change in the detection parameters of the detection element and generates a sensing signal, and the controller receives the sensing signal and stops the heating component from working.
[0015] As an alternative to an aerosol generation device, the detection element is a magnetic body or has a magnetic medium, the sensor is a Hall effect sensor, and the detection parameter is magnetic field strength.
[0016] As an alternative to the aerosol generating device, the aerosol generating device further includes a suction member disposed on the body, and the detection member attracts the suction member by magnetic force so that the cover is placed in the first state.
[0017] As an alternative to an aerosol generating device, the suction element is a non-magnetic material.
[0018] As an alternative to the aerosol generating device, the attracting element is a magnetic body or has a magnetic medium, and the magnetic field of the attracting element avoids the sensor.
[0019] As an alternative to the aerosol generating device, the attracting element is a magnetic body or has a magnetic medium, and the polarity of the attracting element toward the sensor is opposite to the detection polarity of the sensor.
[0020] As an alternative to the aerosol generating device, the cover is provided with a mounting groove, and the detection element is disposed in the mounting groove. When the cover is in the first state, the cover and the body abut against each other to seal the mounting groove.
[0021] As an alternative to the aerosol generating device, the support member is detachably connected to the cover, the support member is provided with an air inlet channel, the air inlet channel is connected to the heating chamber, and external air can enter the heating chamber through the air inlet channel.
[0022] As an alternative to the aerosol generating device, the aerosol generating device further includes a suction nozzle assembly, the suction nozzle assembly comprising:
[0023] Suction nozzle for holding in the mouth;
[0024] An air guide is provided, one end of which is connected to the nozzle and the other end of which extends into the heating chamber. Both ends of the air guide are connected to the heating chamber and the nozzle, respectively.
[0025] As an alternative to the aerosol generating device, the nozzle assembly further includes an elastic element sandwiched between the air guide and the nozzle. The air guide is threadedly connected to the nozzle, and the elastic element is compressed to provide a preload force in the screw-in direction for the threaded connection between the air guide and the nozzle.
[0026] Beneficial effects:
[0027] In this invention, when the cover is in the first closed state, the support member extends at least partially into the heating chamber, thereby supporting the aerosol-generated product. The support member is detachably connected to the cover. Users can easily clean condensate and residues by opening the cover and removing the support member, without needing special tools or cleaning the cover itself. Furthermore, replacing the support member directly does not damage the cover, making the operation simple, convenient, and cost-effective. Further, the detection element works in conjunction with the sensor, with the detection element fixed to the cover and the sensor fixed to the main body. When the cover switches from the first state to the second state, the parameters of the detection element relative to the sensor change significantly. These parameters can be physical parameters, such as force or magnetic parameters. Based on these parameter changes, a corresponding sensing signal is generated. This sensing signal can be a voltage or current signal and is transmitted to the controller. Upon receiving the sensing signal, the controller stops the heating component, immediately shutting off the heating function. When the cover is accidentally opened due to vibration or user touch, i.e., when the first state is deactivated, the controller can immediately shut down the heating component, thereby preventing the continuous generation of high-temperature gas inside and its escape through the opening, which could even burn the user and improve safety. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the structure of the aerosol generating device with the cover in the first state provided in this embodiment of the utility model;
[0029] Figure 2 This is a cross-sectional view of the aerosol generating device provided in this embodiment of the present invention, in which the cover is in a first state and the detection element is hidden.
[0030] Figure 3 This is a schematic diagram of the aerosol generating device with the cover in the second state provided in this embodiment of the utility model;
[0031] Figure 4 This is a cross-sectional view of the aerosol generating device with the cover in the second state provided in this embodiment of the present invention;
[0032] Figure 5 This is a schematic diagram of the suction nozzle assembly provided in an embodiment of the present invention.
[0033] In the picture:
[0034] 10. Aerosol generating apparatus; 100. Aerosol generated products;
[0035] 1. Ontology;
[0036] 2. Heating assembly; 21. Heating chamber; 211. Opening;
[0037] 3. Cover; 31. Mounting groove; 32. Protrusion;
[0038] 4. Support components; 41. Air intake passage;
[0039] 5. Test items;
[0040] 6. Sensors;
[0041] 7. Suction-fitting components;
[0042] 8. Suction nozzle assembly; 81. Suction nozzle component; 82. Air guide component; 83. Elastic component. Detailed Implementation
[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0044] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0046] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0047] Please see the appendix Figure 1 -Appendix Figure 4 This embodiment relates to an aerosol generating device 10.
[0048] It should be noted that the aerosol generating apparatus 10 can be used in conjunction with the aerosol generating article 100, so that the aerosol generating article 100 generates aerosols. The aerosol generating article 100 contains an aerosol generating matrix, which may include tobacco-containing materials containing volatile tobacco flavor compounds that are released from the substrate upon heating.
[0049] Specifically, the aerosol generating matrix can be an aerosol generating matrix containing liquid tobacco or an aerosol generating matrix containing solid tobacco. Alternatively, the aerosol generating matrix may include non-tobacco materials. The aerosol generating matrix may also include aerosol forming agents. Examples of suitable aerosol forming agents are glycerol and propylene glycol.
[0050] The aerosol generating device 10 heats the aerosol generating product 100, causing the aerosol generating matrix to produce volatile substances. These volatile substances combine with air flowing into the aerosol generating matrix to form an aerosol. The air flowing into the aerosol generating matrix and the aerosol generated by the aerosol generating matrix can be inhaled into the user's mouth.
[0051] This aerosol generating device 10 includes a body 1, a heating assembly 2, a cover 3, a support 4, a detection element 5, a sensor 6, and a controller. The heating assembly 2 has a heating chamber 21 for accommodating the aerosol generating article 100, and one end of the heating chamber 21 forms an opening 211 for the aerosol generating article 100 to pass through. The cover 3 has a first state with the opening 211 closed and a second state with the opening 211 open. The support 4 is disposed on the cover 3. When the cover 3 is in the first state, the support 4 extends at least partially into the heating chamber 21 and is used to support the aerosol generating article 100. The detection element 5 is disposed on the cover 3. The sensor 6 and the controller are both disposed on the body 1, and the sensor 6 and the heating assembly 2 are respectively signal-connected to the controller. When the cover 3 is released from the first state, the sensor 6 receives the change in the detection parameter of the detection element 5 and generates a sensing signal, and the controller receives the sensing signal and stops the heating assembly 2 from working.
[0052] Specifically, the main body 1 typically includes an outer shell, multiple functional components disposed inside the outer shell, and airflow channels, etc. The outer shell can be used to support and position the multiple internal functional components. The overall appearance of the main body 1 can be reasonably adjusted according to the user's grip comfort and personalized functional expansion.
[0053] In this embodiment, the body 1 has a columnar structure, and a heating component 2 is provided inside the body 1. The heating component 2 forms a columnar heating cavity 21. The body 1 has a first end and a second end, wherein the first end is for the user to hold and suck in, and the second end is for taking out and putting in the aerosol generating product 100. In this embodiment, the aerosol generating product 100 has a solid block structure. The heating cavity 21 is located near the second end, and an opening 211 is formed on one side of the heating cavity 21 for the aerosol generating product 100 to pass through.
[0054] The cover 3 is movably connected to the body 1, and can be either slidable or rotated. In this embodiment, the cover 3 is rotated to close or open the opening 211. Compared to sliding, rotating avoids the accumulation of dust inside the track, ensuring the flexibility of the cover 3's operation.
[0055] When the cover 3 is in the first state of closing the opening 211, the support 4 extends at least partially into the heating chamber 21, thereby supporting the aerosol-generating product 100.
[0056] In this embodiment, the support member 4 can be made of heat-resistant silicone. The support member 4 is detachably connected to the cover 3, and the detachment can be achieved through methods such as snap-fit or screw connection. After the aerosol generating device 10 has been used for a certain period of time, condensate and residue accumulate on the support member 4. The user can easily clean the condensate and residue by opening the cover 3 and then disassembling the support member 4, without the need for special tools or cleaning the cover 3 at the same time. In addition, once the support member 4 fails, a new support member 4 can be directly replaced without damaging the cover 3. The operation is simple, convenient, and low-cost.
[0057] Furthermore, the detection element 5 is used in conjunction with the sensor 6, wherein the detection element 5 is fixed to the cover 3 and the sensor 6 is fixed to the body 1. When the cover 3 switches from the first state to the second state, that is, the parameter of the detection element 5 relative to the sensor 6 changes significantly, the parameter can be a physical parameter, such as a force parameter or a magnetic parameter, etc., and the sensor 6 generates a corresponding sensing signal according to the parameter change. The sensing signal can be a voltage signal or a current signal and is transmitted to the controller. After receiving the sensing signal, the controller stops the heating component 2 from working, that is, immediately turns off the heating function.
[0058] When the cover 3 is accidentally opened due to vibration or user accidental contact, i.e. when the cover 3 suddenly releases the first state, the controller can immediately shut down the heating component 2, thereby preventing the continuous generation of high-temperature gas inside the heating chamber 21 from escaping through the opening 211 and even scalding the user, thus improving the safety of use.
[0059] Optionally, the support member 4 is detachably connected to the cover 3. The support member 4 is provided with an air intake channel 41, which is connected to the heating chamber 21. External air can enter the heating chamber 21 through the air intake channel 41.
[0060] Specifically, the support member 4 has a hollow structure inside to form an air intake channel 41, and has an air intake hole on the body 1. Since the generation of aerosol requires air mixing, air enters from the air intake hole and gathers inside the heating chamber 21 through the air intake channel 41.
[0061] In this embodiment, an air intake channel 41 is provided on the support member 4, which avoids the need to independently open a gas flow channel inside the main body 1 and simplifies the gas flow channel structure.
[0062] Optionally, the cover 3 is provided with a mounting groove 31, and the detection element 5 is disposed in the mounting groove 31. When the cover 3 is in the first state, the cover 3 and the body 1 abut against each other to seal the mounting groove 31.
[0063] In this embodiment, a mounting groove 31 is formed on the side of the cover 3 facing the body 1, and the detection element 5 is fixed in the mounting groove 31. When the cover 3 closes the opening 211, the cover 3 is connected to the body 1 to ensure that the cover 3 will not be accidentally released from the first state. Of course, the two can be connected by a detachable method such as snap-fit, screw-fit, or magnetic attraction, and the specific method can be selected accordingly. The part of the cover 3 that abuts against the body 1 can be an elastic structure, or the cover 3 as a whole can be made of elastic material, so that the sealing of the mounting groove 31 can be guaranteed by its own elasticity. The structure is simple and the function is expanded.
[0064] Since the body 1 has a flow channel for air and aerosol to pass through, in order to prevent the above-mentioned gases from entering the mounting groove 31, the sealing is improved by the contact between the cover 3 and the body 1, which can ensure the service life of the detection element 5 or prevent performance degradation.
[0065] Furthermore, the inner wall of the mounting groove 31 is provided with a protrusion 32, which is elastic. The detection element 5 squeezes the protrusion 32 and deforms, so that the detection element 5 is fixed in the mounting groove 31.
[0066] In this embodiment, the protrusion 32 can be a strip-shaped interference rib, and multiple strips can be provided. The detection element 5 is interference-fitted with the protrusion 32, so that the detection element 5 is stably fixed inside the mounting groove 31, ensuring the simplicity and reliability of the connection structure.
[0067] Optionally, the detection element 5 is a magnetic body or has a magnetic medium, the sensor 6 is a Hall effect sensor, and the detection parameter is the magnetic field strength.
[0068] In this embodiment, the detection element 5 is a magnet or has a magnetic medium inside, so that there is a magnetic field around the detection element 5 that can be detected by the sensor 6. When the cover 3 is released from the first state, the relative position between the sensor 6 and the detection element 5 changes, so the sensor 6 immediately detects the change in the magnetic field of the detection element 5. The specific detection parameter can be the magnetic field strength. The sensor 6 converts the signal of the change in magnetic field strength into a voltage signal and transmits it to the controller. After receiving the signal, the controller controls the heating component 2 to stop heating.
[0069] It should be noted that sensor 6 can be a conventional Hall effect sensor. The basic principle of Hall effect sensor to collect magnetic field strength signal and convert it into electrical signal can be referred to the existing technology, and will not be elaborated in this embodiment.
[0070] Optionally, the aerosol generating device 10 further includes a suction member 7, which is disposed on the body 1. The detection member 5 attracts the suction member 7 by magnetic force so that the cover 3 is placed in the first state.
[0071] Specifically, a suction member 7 is provided on the main body 1 near the cover 3. The suction member 7 has the ability to be attracted by the detection member 5. That is, when the cover 3 rotates and gradually approaches the first state, the suction member 7 gradually approaches the detection member 5, thereby closing the opening 211 of the cover 3 through the magnetic attraction between the detection member 5 and the suction member 7.
[0072] In this embodiment, the detection element 5 has two functions: first, it provides the detection signal to the sensor 6; second, it connects the cover 3 and the body 1.
[0073] Furthermore, the attracting element 7 is a non-magnetic material.
[0074] In this embodiment, the attracting element 7 can be made of ferrous metal, such as an iron block. The attracting element 7 is a non-magnetic body, meaning that no magnetic field is generated around the attracting element 7. Therefore, interference with the magnetic field detection of the sensor 6 can be avoided, ensuring the singularity and accuracy of the magnetic field detection of the detection element 5.
[0075] In other embodiments, the attracting element 7 may be a magnetic body or have a magnetic medium, and the magnetic field of the attracting element 7 may avoid the sensor 6, or the polarity of the attracting element 7 toward the sensor 6 may be opposite to the detection polarity of the sensor 6.
[0076] Of course, to ensure sufficient attraction force between the detection element 5 and the suction element 7 within a limited volume, the suction element 7 can be made magnetic or have a magnetic medium. However, once the suction element 7 becomes magnetic, a magnetic field will be generated around it. To prevent the magnetic field of the suction element 7 from affecting the sensor 6's data acquisition, a coupling magnetic field can be added. This involves adding a coupling magnet to change the magnetic field path of the suction element 7, ensuring that the magnetic field of the suction element 7 completely avoids the sensor 6, thus preventing interference with the sensor 6's magnetic field detection. Alternatively, the sensor 6 can use a Hall effect sensor that detects a single polarity, with the polarity of the suction element 7 facing the sensor 6 opposite to the sensor 6's detection polarity. For example, if the suction element 7 faces the sensor 6 with the N pole, and the sensor 6's detection polarity is the S pole, this also ensures that interference with the sensor 6's magnetic field detection is avoided, and similarly achieves the same single polarity and accuracy in detecting the magnetic field of the detection element 5.
[0077] Please continue to refer to the appendix. Figure 5 In this embodiment, the aerosol generating device 10 further includes a nozzle assembly 8, which includes a nozzle component 81 and an air guide component 82. The nozzle component 81 is for holding the aerosol; one end of the air guide component 82 is connected to the nozzle component 81, and the other end extends into the heating chamber 21. Both ends of the air guide component 82 are respectively connected to the heating chamber 21 and the nozzle component 81.
[0078] Specifically, the air guide 82 is a long, straight metal tube used to guide the aerosol inside the heating chamber 21 to the suction nozzle 81, and then to be sucked into the user's mouth through the suction nozzle 81. The air guide 82 and the suction nozzle 81 can be connected in various ways, and multiple connectors can be provided at the connection point for easy assembly. This embodiment uses a threaded connection, that is, the connection is achieved by the engagement of internal and external threads.
[0079] Furthermore, the nozzle assembly 8 also includes an elastic element 83, which is sandwiched between the air guide 82 and the nozzle 81. The air guide 82 is threadedly connected to the nozzle 81, and the elastic element 83 is compressed to provide a preload force in the screwing direction for the threaded connection between the air guide 82 and the nozzle 81.
[0080] Specifically, the elastic element 83 is a silicone pad, which is sleeved on the suction nozzle 81, with one end abutting against the end face of the suction nozzle 81. As the air guide 82 and the suction nozzle 81 are screwed together, the air guide 82 continuously squeezes the elastic element 83, causing it to deform. As a result, the elastic element 83 reacts to the air guide 82 and provides a preload force in the screwing direction to the threaded connection between the air guide 82 and the suction nozzle 81, so that the threads of the air guide 82 and the suction nozzle 81 are tightly fitted together.
[0081] Since the user uses the suction nozzle assembly 8 for suction, the suction nozzle 81 and the air guide 82 need to be easily disassembled to facilitate cleaning impurities accumulated during long-term use. The threaded connection facilitates this disassembly. In this embodiment, the elastic element 83 increases the preload between the air guide 82 and the suction nozzle 81, ensuring a tight fit between the threads and preventing loosening. By using the elastic element 83, the hard contact and engagement of ordinary threaded connections are avoided, solving the problem of gaps appearing between the threads after prolonged use, leading to loosening and requiring frequent tightening by the user.
[0082] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. An aerosol generating apparatus, characterized in that, include: ontology; A heating assembly having a heating chamber for accommodating an aerosol-generating article, one end of which forms an opening for the aerosol-generating article to pass through; The cover has a first state in which the opening is closed and a second state in which the opening is open; A support member is provided on the cover; when the cover is in the first state, the support member extends at least partially into the heating chamber and is used to support the aerosol-generated product; The detection element is located on the cover. Both the sensor and the controller are located on the main body, and the sensor and the heating assembly are respectively connected to the controller via signal connections; wherein... When the cover is released from the first state, the sensor receives the change in the detection parameters of the detection element and generates a sensing signal, and the controller receives the sensing signal and stops the heating component from working.
2. The aerosol generating apparatus according to claim 1, characterized in that, The detection element is a magnetic body or has a magnetic medium, the sensor is a Hall effect sensor, and the detection parameter is magnetic field strength.
3. The aerosol generating apparatus according to claim 2, characterized in that, The aerosol generating device further includes a suction member disposed on the main body. The detection member attracts the suction member by magnetic force so that the cover is placed in the first state.
4. The aerosol generating apparatus according to claim 3, characterized in that, The attracting element is a non-magnetic material.
5. The aerosol generating apparatus according to claim 3, characterized in that, The attracting element is a magnetic body or has a magnetic medium, and the magnetic field of the attracting element avoids the sensor.
6. The aerosol generating apparatus according to claim 3, characterized in that, The attracting element is a magnetic body or has a magnetic medium, and the polarity of the attracting element facing the sensor is opposite to the detection polarity of the sensor.
7. The aerosol generating apparatus according to claim 1, characterized in that, The cover is provided with a mounting groove, and the detection element is disposed in the mounting groove. When the cover is in the first state, the cover and the body abut against each other to seal the mounting groove.
8. The aerosol generating apparatus according to any one of claims 1-7, characterized in that, The support member is detachably connected to the cover. The support member is provided with an air intake channel, which is connected to the heating chamber, allowing external air to enter the heating chamber through the air intake channel.
9. The aerosol generating apparatus according to any one of claims 1-7, characterized in that, The aerosol generating device further includes a suction nozzle assembly, which comprises: Suction nozzle for holding in the mouth; An air guide is provided, one end of which is connected to the nozzle and the other end of which extends into the heating chamber. Both ends of the air guide are connected to the heating chamber and the nozzle, respectively.
10. The aerosol generating apparatus according to claim 9, characterized in that, The nozzle assembly further includes an elastic element sandwiched between the air guide and the nozzle. The air guide is threadedly connected to the nozzle. The elastic element is compressed to provide a preload force in the screw-in direction for the threaded connection between the air guide and the nozzle.