Heating furnace structure and popcorn machine

Abstract

The utility model relates to a heating furnace structure and a popcorn machine, and belongs to the field of popcorn machines, the heating furnace structure comprises: an air guide assembly, the air guide assembly is provided with an air inlet, and the air guide assembly is provided with an air guide channel; the heating assembly is arranged on the air guide assembly, and the heating assembly is located in the extending direction of the air guide channel; the barrel assembly is arranged on the heating assembly, the barrel assembly is provided with a containing cavity and an opening, the opening is communicated with the containing cavity, and the containing cavity is used for containing popcorn raw materials; and the filtering assembly is arranged on the air guide assembly and located at the air inlet. According to the heating furnace structure, the heating assembly is directly arranged on the air guide assembly, unnecessary space intervals are reduced, and therefore the overall occupied space is effectively saved, the structure is simple, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of popcorn machines, and in particular to a heating furnace structure and a popcorn machine. Background Technology

[0002] A popcorn machine is a machine that uses heat and pressure to expand popcorn ingredients, such as corn kernels, to produce crispy and delicious popcorn. Traditional popcorn machines typically have a separate heating element, where a blower is connected to the heating structure via a long ventilation duct. The blower blows hot air into the heating structure to heat the corn kernels, and then blows the popped kernels to the designated location. However, this separate heating element design results in a large footprint, a complex structure, and high manufacturing costs. Utility Model Content

[0003] Therefore, it is necessary to address the problems of traditional popcorn machines having a separate heating furnace design that results in large space occupation, complex structure, and high manufacturing cost, and to provide a heating furnace structure and popcorn machine.

[0004] A heating furnace structure includes: an air guide assembly having an air inlet and an air guide channel; a heating assembly disposed on the air guide assembly and located in the extending direction of the air guide channel; a cylindrical assembly disposed on the heating assembly, having a receiving cavity and an opening communicating with the receiving cavity, the receiving cavity being used to hold popcorn raw materials; and a filter assembly disposed on the air guide assembly and located at the air inlet.

[0005] The first aspect of this application discloses a heating furnace structure in which the heating element is directly mounted on the air guide assembly. Compared to the traditional design that requires connecting the fan to the heating element through a long ventilation duct, this design allows for tighter connections between components, reducing unnecessary space and effectively saving overall space. The structure is also simpler, reducing manufacturing costs. The air guide assembly has airflow channels that guide airflow, enabling more effective transfer of heat generated by the heating element to the cylinder assembly, resulting in better heating of the popcorn ingredients placed in the cylinder assembly. A filter assembly located at the air inlet filters the fluid entering from the air inlet, preventing impurities carried by the fluid from affecting the product's functionality.

[0006] In one embodiment, the air guide channel extends in the same direction as the axial direction of the air guide assembly. By aligning the air guide channel's extension direction with the axial direction of the air guide assembly, the fluid flow within the air guide channel becomes smoother and more stable. This design allows the fluid to directly deliver heat from the heating element to the cylinder assembly along the axial direction of the air guide assembly, reducing heat loss during transfer.

[0007] In one embodiment, the air inlet is located at the end of the air guide assembly away from the heating assembly. By placing the air inlet at one end of the air guide assembly, the layout is more rational, thereby ensuring that the airflow can flow to the heating assembly and the cylinder assembly in a more stable and orderly manner.

[0008] In one embodiment, the air guiding assembly includes a support member and an air guiding member. The support member has the air inlet and the air guiding channel. The air guiding member is disposed on the support member and located at the air guiding channel. The air guiding member is used to draw fluid in from the air inlet and output it to the air guiding channel. The support member provides a stable support foundation for the air guiding member. The air guiding member generates power to draw in external airflow, allowing the heat from the heating component to be transferred more effectively to the cylinder assembly.

[0009] In one embodiment, the air guide includes a first drive motor and a first fan blade structure. The first drive motor is mounted on the support and located within the air guide channel, and the first fan blade structure is driveably connected to the first drive motor. Through this drive connection, the first drive motor drives the first fan blade structure to rotate. This design allows for precise control of the motor's speed, enabling accurate adjustment of airflow rate and velocity. The first drive motor is preferably a brushless DC motor, unaffected by fluctuations in external AC power. For AC-V, a wide-voltage switching power supply can be used directly, eliminating the need for the first drive motor to match different national voltages.

[0010] In one embodiment, the support includes a first support component and a second support component. The first support component is disposed on the heating assembly, and the second support component is disposed on the first support component. The first and second support components together form the air guide channel, and the air guide is disposed on the first and / or the second support component. The first and second support components provide stable support for the air guide, resulting in good assembly stability and robustness. Furthermore, the assembly method is simpler and more convenient, and disassembly and assembly are easy.

[0011] In one embodiment, an air duct baffle is further included. The air duct baffle is disposed on the support member and located between the air guide and the heating assembly. The air duct baffle has a notch communicating with the air guide channel, and the notch extends in the same direction as the air guide channel. The air outlet end of the air guide faces the notch. The notch in the air duct baffle allows the airflow from the air guide to flow orderly towards the heating assembly, avoiding airflow dispersion or turbulence. This design allows for more concentrated heat transfer and effectively reduces heat loss.

[0012] In one embodiment, a control board and a temperature probe are also included. The control board is electrically connected to the heating component, and the temperature probe is electrically connected to the control board. The temperature probe detects the temperature of the heating component. When the temperature of the heating component exceeds a first preset value, the temperature probe sends an electrical signal. The control board receives the electrical signal sent by the temperature probe and disconnects the connection circuit with the heating component. By setting the temperature probe, the temperature information of the heating component can be fed back in real time. When the temperature of the heating component is too high, the circuit can be disconnected in time to prevent damage to the heating component due to overheating, effectively extending the service life of the heating component. It also improves the safety performance of the product. The control board can be externally mounted or internally mounted on the product.

[0013] In one embodiment, a temperature control switch is also included. This temperature control switch is electrically connected to the heating element. When the temperature of the heating element exceeds a second preset value, the temperature control switch disconnects the circuit from the heating element. By setting the temperature control switch, the circuit can be disconnected promptly when the heating element temperature is too high, preventing damage due to overheating and effectively extending the service life of the heating element. It also improves the product's safety performance. The temperature control switch can be located on the cylinder assembly or on the heating element.

[0014] In one embodiment, the heating assembly includes a housing and a heating element. The housing is disposed on the air guide assembly and has a heating cavity. The heating element is disposed on the air guide assembly and / or the housing and located within the heating cavity. The heating element generates heat to process the popcorn raw material in the popcorn cylinder assembly into popcorn, making it highly practical.

[0015] In one embodiment, the heating element includes a support structure and a heating wire. The support structure is disposed on the air guide assembly, and the heating wire is disposed on the support structure, located within the heating chamber. The support structure provides stable support for the heating wire, ensuring that the heating wire remains in a fixed position within the heating chamber. This design guarantees stable heating function of the heating wire.

[0016] In one embodiment, the housing is provided with heat dissipation holes that communicate with the heating chamber. The heat dissipation holes facilitate the dissipation of heat from the heating wire to the outside, ensuring the continuous use of the heating wire.

[0017] In one embodiment, the filter assembly is a filter element or filter cotton. By using a filter element or filter cotton as the filter assembly, dust and other fine particulate matter in the air entering the air guide assembly can be effectively intercepted. The filter cotton is preferably a flat type of filter cotton.

[0018] In one embodiment, a first thread is formed on the filter assembly, and a second thread is formed on the air guide assembly, with the first thread and the second thread being compatible. The filter assembly and air guide assembly are screwed together, making the installation and removal of the filter assembly simple and convenient, facilitating filter replacement for the user.

[0019] In one embodiment, the air guide includes a second drive motor, a flow guide structure, and a second fan blade structure. Both the second drive motor and the flow guide structure are mounted on the support member. The second fan blade structure is mounted on the flow guide structure and located inside the flow guide structure. The second fan blade structure is drively connected to the second drive motor. The flow guide structure allows airflow to flow in a predetermined direction and path. This design ensures that airflow is stably and orderly drawn in from the air inlet, guided by the flow guide structure, and evenly output to the heating assembly and the cylinder assembly, improving manufacturing efficiency. Preferably, the flow guide structure and the second fan blade structure are combined to form a structure similar to a vacuum cleaner or a fan.

[0020] In one embodiment, the filter assembly is snapped into the air guide assembly. This snap-fit ​​connection simplifies the installation and removal of the filter assembly, making it easy for users to replace the filter cartridge, simplifying maintenance, and improving the user experience.

[0021] A popcorn machine includes the heating furnace structure described above.

[0022] The second aspect of this application discloses a popcorn machine in which the heating element of the heating furnace structure is directly mounted on the air guide assembly, resulting in a tighter connection between the various components, reducing unnecessary space gaps, effectively saving overall space, and simplifying the structure, thus reducing manufacturing costs. The air guide assembly has airflow channels that guide airflow, allowing the heat generated by the heating element to be more effectively transferred to the cylinder assembly, resulting in good heating of the popcorn ingredients placed in the cylinder assembly. Attached Figure Description

[0023] Figure 1 This is a three-dimensional view of the heating furnace structure;

[0024] Figure 2 This is a cross-sectional view of the heating furnace structure;

[0025] Figure 3 This is the first exploded view of the heating furnace structure;

[0026] Figure 4 This is the second exploded view of the heating furnace structure;

[0027] Figure 5 This is a 3D view of the heating assembly;

[0028] Figure 6 A three-dimensional view of the support component;

[0029] Figure 7 A 3D view of the air duct baffle;

[0030] Figure 8 This is a 3D view of the filter assembly.

[0031] The correspondence between the reference numerals and the component names is as follows:

[0032] 1 air guide assembly, 11 support component, 111 first support component, 112 second support component, 12 air guide component, 121 first drive motor, 101 air inlet, 102 air guide channel;

[0033] 2 heating component, 21 outer shell, 22 heating element, 221 supporting structure, 222 heating wire, 201 heating chamber, 202 heat dissipation hole;

[0034] 3. Cylindrical assembly, 301 receiving cavity, 302 opening;

[0035] 4 filter components;

[0036] 5. Air duct baffle, 501 notch;

[0037] 6 temperature probes;

[0038] 7. Temperature control switch. Detailed Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0041] Example 1

[0042] like Figure 1-3 As shown, this embodiment discloses a heating furnace structure, including: an air guide assembly 1, which has an air inlet 101 and an air guide channel 102; a heating assembly 2, which is disposed on the air guide assembly 1 and located in the extending direction of the air guide channel 102; a cylindrical assembly 3, which is disposed on the heating assembly 2 and has a receiving cavity 301 and an opening 302, the opening 302 communicating with the receiving cavity 301, the receiving cavity 301 being used to hold popcorn raw materials; and a filter assembly 4, which is disposed on the air guide assembly 1 and located at the air inlet 101.

[0043] The first aspect of this application discloses a heating furnace structure in which the heating component 2 is directly mounted on the air guide component 1. Compared with the traditional scheme that requires the fan to be connected to the heating component 2 through a long ventilation pipe, the connection between the various components in this design is more compact, reducing unnecessary space intervals and thus effectively saving overall space. The structure is simpler and the manufacturing cost is reduced. The air guide component 1 is provided with an air guide channel 102 to guide the airflow, so that the heat generated by the heating component 2 can be more effectively transferred to the cylinder component 3, resulting in better heating of the popcorn raw materials placed in the cylinder component 3. The filter component 4 is located at the air inlet 101, and the fluid entering from the air inlet 101 is filtered to prevent impurities carried by the fluid from affecting the use of the product.

[0044] like Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further specifies that the extending direction of the air guide channel 102 is the same as the axial direction of the air guide assembly 1. By ensuring that the extending direction of the air guide channel 102 is the same as the axial direction of the air guide assembly 1, the flow of fluid within the air guide channel 102 is smoother and more stable. This design allows the fluid to directly blow the heat from the heating assembly 2 onto the cylinder assembly 3 along the axial direction of the air guide assembly 1, reducing heat loss during the transfer process.

[0045] like Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further specifies that the air inlet 101 is located at the end of the air guide assembly 1 away from the heating assembly 2. By positioning the air inlet 101 at one end of the air guide assembly 1, the layout is more reasonable, thereby ensuring that the airflow can flow to the heating assembly 2 and the cylinder assembly 3 in a more stable and orderly manner.

[0046] like Figure 2As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the air guiding assembly 1 includes a support member 11 and an air guiding member 12. The support member 11 is provided with the air inlet 101 and the air guiding channel 102. The air guiding member 12 is disposed on the support member 11 and located at the air guiding channel 102. The air guiding member 12 is used to draw fluid in from the air inlet 101 and output it to the air guiding channel 102. The support member 11 provides a stable support foundation for the air guiding member 12. The air guiding member 12 can generate power to draw in external airflow, so that the heat of the heating assembly 2 can be more effectively transferred to the cylinder assembly 3.

[0047] like Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the air guide 12 includes a first drive motor 121 and a first fan blade structure. The first drive motor 121 is mounted on the support 11 and located within the air guide channel 102, and the first fan blade structure is driven by the first drive motor 121. Through the drive connection between the first fan blade structure and the first drive motor 121, the first drive motor 121 drives the first fan blade structure to rotate. This design allows for precise adjustment of airflow rate and velocity by accurately controlling the motor's speed. The first drive motor 121 is preferably a DC brushless motor, which is not affected by fluctuations in external AC power. For AC power of 100-240V, a wide-voltage switching power supply can be used directly, eliminating the need for the first drive motor 121 to match different national voltages.

[0048] like Figure 6 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the support member 11 includes a first support component 111 and a second support component 112. The first support component 111 is disposed on the heating assembly 2, and the second support component 112 is disposed on the first support component 111. The first support component 111 and the second support component 112 enclose and form the air guide channel 102. The air guide 12 is disposed on the first support component 111 and / or the second support component 112. The first support component 111 and the second support component 112 provide stable support for the air guide 12, resulting in good assembly stability and firmness. Moreover, the assembly method is simpler and more convenient, and disassembly and assembly are easy.

[0049] like Figure 2 , Figure 4 and Figure 7As shown, in addition to the features of the above embodiments, this embodiment further includes: a duct baffle 5, which is disposed on the support member 11 and located between the air guide member 12 and the heating assembly 2. The duct baffle 5 has a notch 501 communicating with the air guide channel 102, and the extension direction of the notch 501 is the same as the extension direction of the air guide channel 102. The air outlet end of the air guide member 12 is oriented towards the notch 501. The notch 501 in the duct baffle 5 allows the airflow blown out by the air guide member 12 to flow orderly to the heating assembly 2, avoiding airflow dispersion or turbulence. This design enables more concentrated heat transfer and effectively reduces heat loss.

[0050] like Figure 1-3 As shown, in addition to the features of the above embodiments, this embodiment further includes a control board and a temperature probe 6. The control board is electrically connected to the heating component 2, and the temperature probe 6 is electrically connected to the control board. The temperature probe 6 is used to detect the temperature of the heating component 2. When the temperature probe 6 detects that the temperature value of the heating component 2 is higher than a first preset value, the temperature probe 6 sends an electrical signal. The control board can receive the electrical signal sent by the temperature probe 6 and disconnect the connection circuit with the heating component 2. By setting the temperature probe 6, the temperature information of the heating component 2 can be fed back in real time. When the temperature of the heating component 2 is too high, the circuit can be disconnected in time to avoid damage to the heating component 2 due to overheating, effectively improving the service life of the heating component 2. Moreover, it can improve the safety performance of the product. The control board can be external or internal to the product.

[0051] like Figure 1-3 As shown, in addition to the features of the above embodiments, this embodiment further includes a temperature control switch 7, which is electrically connected to the heating component 2. When the temperature of the heating component 2 exceeds a second preset value, the temperature control switch 7 disconnects the circuit from the heating component 2. The temperature control switch 7 ensures that the circuit can be disconnected promptly when the temperature of the heating component 2 is too high, preventing damage to the heating component 2 due to overheating and effectively extending its service life. It also improves the product's safety performance. The temperature control switch 7 can be installed on the cylinder assembly 3 or on the heating component 2.

[0052] like Figure 2 and Figure 4As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the heating assembly 2 includes a housing 21 and a heating element 22. The housing 21 is disposed on the air guide assembly 1 and has a heating cavity 201. The heating element 22 is disposed on the air guide assembly 1 and / or the housing 21 and is located within the heating cavity 201. The heating element 22 generates heat to process the popcorn raw materials in the cylinder assembly 3 into popcorn, making it highly practical.

[0053] like Figure 5 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the heating element 22 includes a support structure 221 and a heating wire 222. The support structure 221 is disposed on the air guide assembly 1, and the heating wire 222 is disposed on the support structure 221, with the heating wire 222 located within the heating chamber 201. The support structure 221 provides stable support for the heating wire 222, ensuring that the heating wire 222 maintains a fixed position within the heating chamber 201. This design ensures the stable operation of the heating function of the heating wire 222.

[0054] like Figure 1 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the outer casing 21 is provided with heat dissipation holes 202, and the heat dissipation holes 202 are connected to the heating chamber 201. The provision of heat dissipation holes 202 facilitates the dissipation of heat from the heating wire 222 to the outside, ensuring the continuous use of the heating wire 222.

[0055] like Figure 8 As shown, in addition to the features of the above embodiments, this embodiment further specifies that the filter component 4 is a filter element or filter cotton. By using a filter element or filter cotton as the filter component 4, dust and other fine particulate matter in the air entering the air guide component 1 can be effectively intercepted. The filter cotton is preferably a planar filter cotton.

[0056] In addition to the features of the above embodiments, this embodiment further specifies that: a first thread is formed on the filter assembly 4, and a second thread is formed on the air guide assembly 1, wherein the first thread and the second thread are adapted to each other. By screwing the filter assembly 4 and the air guide assembly 1 together, the installation and removal of the filter assembly 4 is simple and convenient, facilitating the user's replacement of the filter element.

[0057] In addition to the features of the above embodiments, this embodiment further specifies that: the air guide 12 includes a second drive motor, a flow guide structure, and a second fan blade structure. Both the second drive motor and the flow guide structure are mounted on the support member 11. The second fan blade structure is mounted on the flow guide structure and located inside the flow guide structure. The second fan blade structure is drive-connected to the second drive motor. The flow guide structure allows airflow to flow in a predetermined direction and path. This design ensures that airflow is stably and orderly drawn in from the air inlet 101, and after being guided by the flow guide structure, is evenly output to the heating assembly 2 and the cylinder assembly 3, improving manufacturing efficiency. Preferably, the flow guide structure and the second fan blade structure are combined to form a structure similar to a vacuum cleaner or a fan.

[0058] In addition to the features of the above embodiments, this embodiment further specifies that the filter component 4 is snap-fitted with the air guide component 1. By snapping the filter component 4 with the air guide component 1, the installation and removal of the filter component 4 is simple and convenient, facilitating filter replacement for users, simplifying maintenance, and improving the user experience.

[0059] Example 2

[0060] This embodiment discloses a popcorn machine, including the heating furnace structure described above.

[0061] The second aspect of this application discloses a popcorn machine in which the heating component 2 of the heating furnace structure is directly mounted on the air guide component 1, resulting in a tighter connection between the various components, reducing unnecessary space gaps, effectively saving overall space, and simplifying the structure, thus reducing manufacturing costs. The air guide component 1 is provided with an air guide channel 102 to guide airflow, enabling the heat generated by the heating component 2 to be more effectively transferred to the cylinder component 3, resulting in good heating effect on the popcorn raw materials placed in the cylinder component 3.

[0062] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A heating furnace structure, characterized in that, include: An air guide assembly (1) is provided with an air inlet (101) and an air guide channel (102); Heating component (2), the heating component (2) is disposed on the air guide component (1), the heating component (2) is located in the extension direction of the air guide channel (102); A cylindrical assembly (3) is disposed on the heating assembly (2). The cylindrical assembly (3) has a receiving cavity (301) and an opening (302). The opening (302) communicates with the receiving cavity (301). The receiving cavity (301) is used to place popcorn raw materials. A filter assembly (4) is disposed on the air guide assembly (1) and located at the air inlet (101).

2. The heating furnace structure according to claim 1, characterized in that, The extension direction of the air guide channel (102) is the same as the axial direction of the air guide assembly (1); And / or the air inlet (101) is located at the end of the air guide assembly (1) away from the heating assembly (2).

3. The heating furnace structure according to claim 1, characterized in that, The air guide assembly (1) includes a support (11) and an air guide (12). The support (11) is provided with the air inlet (101) and the air guide channel (102). The air guide (12) is disposed on the support (11) and located at the air guide channel (102). The air guide (12) is used to draw fluid from the air inlet (101) and output it to the air guide channel (102).

4. The heating furnace structure according to claim 3, characterized in that, The air guide (12) includes a first drive motor (121) and a first fan blade structure. The first drive motor (121) is disposed on the support (11) and located in the air guide channel (102). The first fan blade structure is connected to the first drive motor (121) in a transmission. Alternatively, the air guide (12) may include a second drive motor, a flow guide structure, and a second fan blade structure. The second drive motor and the flow guide structure are both mounted on the support (11). The second fan blade structure is mounted on the flow guide structure and is located inside the flow guide structure. The second fan blade structure is connected to the second drive motor via a transmission.

5. The heating furnace structure according to claim 3, characterized in that, The support member (11) includes a first support member (111) and a second support member (112). The first support member (111) is disposed on the heating assembly (2), and the second support member (112) is disposed on the first support member (111). The first support member (111) and the second support member (112) together form the air guide channel (102). The air guide member (12) is disposed on the first support member (111) and / or the second support member (112). And / or also includes a duct baffle (5), the duct baffle (5) being disposed on the support member (11), the duct baffle (5) being located between the air guide member (12) and the heating assembly (2), the duct baffle (5) having a notch (501) communicating with the air guide channel (102), the extension direction of the notch (501) being the same as the extension direction of the air guide channel (102), and the air outlet end of the air guide member (12) being disposed toward the notch (501).

6. The heating furnace structure according to claim 1, characterized in that, It also includes a control board and a temperature probe (6). The control board is electrically connected to the heating component (2), and the temperature probe (6) is electrically connected to the control board. The temperature probe (6) is used to detect the temperature of the heating component (2). When the temperature probe (6) detects that the temperature value of the heating component (2) is higher than a first preset value, the temperature probe (6) sends an electrical signal. The control board can receive the electrical signal sent by the temperature probe (6) and disconnect the connection circuit with the heating component (2). And / or may also include a temperature control switch (7) electrically connected to the heating component (2), wherein the temperature control switch (7) disconnects the connection circuit with the heating component (2) when the temperature value of the heating component (2) is higher than a second preset value.

7. The heating furnace structure according to claim 1, characterized in that, The heating component (2) includes a housing (21) and a heating element (22). The housing (21) is disposed on the air guide component (1) and has a heating cavity (201). The heating element (22) is disposed on the air guide component (1) and / or the housing (21) and is located inside the heating cavity (201).

8. The heating furnace structure according to claim 7, characterized in that, The heating element (22) includes a support structure (221) and a heating wire (222). The support structure (221) is disposed on the air guide assembly (1), and the heating wire (222) is disposed on the support structure (221). The heating wire (222) is located inside the heating chamber (201). And / or the housing (21) is provided with heat dissipation holes (202), which are in communication with the heating chamber (201).

9. The heating furnace structure according to claim 1, characterized in that, The filter assembly (4) is a filter element or filter cotton; A first thread is formed on the filter assembly (4), and a second thread is formed on the air guide assembly (1), wherein the first thread is adapted to the second thread; Alternatively, the filter assembly (4) may be snapped into the air guide assembly (1).

10. A popcorn machine, characterized in that, include: The heating furnace structure as described in any one of claims 1-9.

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