A hot air device and a preheating apparatus

Abstract

The utility model discloses a hot -blast device and preheating equipment. Hot -blast device includes the shell, fan and heating assembly, and the inside of shell is equipped with the accommodation cavity, is provided with the air inlet and the air outlet that mutually interval on the shell, and the air inlet, accommodation cavity and air outlet communicate in proper order, heating assembly and fan all set up in accommodation cavity, under the action of fan, airflow enters accommodation cavity from the air inlet, and is discharged to the outside of shell from the air outlet after heating through heating assembly, hot -blast device still includes at least one handle assembly, and handle assembly is arranged in the shell, and can detachably connect external equipment. The utility model discloses handle assembly realizes the detachable connection of shell and external equipment, makes the dismounting process of hot -blast device more simple and quick, and saves maintenance and overhaul time and cost.

Description

Technical Field

[0001] This utility model belongs to the field of lithium batteries, and in particular relates to a hot air device and a preheating equipment. Background Technology

[0002] In the production process of lithium batteries (such as power batteries and energy storage batteries), the cells need to be preheated before the hot pressing process to improve the yield and quality of the batteries.

[0003] In existing technologies, hot air is often generated using a hot air pack to preheat the surface of the battery cell. However, existing hot air packs are typically fixed to external equipment by welding, which is inconvenient for disassembly and maintenance. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in the prior art, hot air packages are usually fixed to external equipment by welding, which is inconvenient for disassembly and maintenance. This utility model provides a hot air device and a preheating device.

[0005] To address the aforementioned issues, this utility model provides a hot air device, comprising a housing, a fan, and a heating element. The housing has an internal cavity, and the housing has spaced-apart air inlets and outlets, which are sequentially connected.

[0006] Both the heating element and the fan are disposed in the accommodating cavity. Under the action of the fan, the airflow enters the accommodating cavity through the air inlet, and after being heated by the heating element, it is discharged to the outside of the outer shell through the air outlet.

[0007] The hot air device also includes at least one handle assembly, which is disposed in the housing and detachably connected to an external device.

[0008] Optionally, there may be multiple handle assemblies, which are arranged in the housing at intervals.

[0009] Optionally, a first direction, a second direction, and a third direction that are perpendicular to each other are defined, and the airflow enters the fan from the air inlet along the third direction and passes through the heating component along the first direction;

[0010] The two handle assemblies are spaced apart on the housing along the first direction, and the fan is located between the two handle assemblies.

[0011] Optionally, the two handle assemblies are spaced apart on the housing along the second direction.

[0012] Optionally, the handle assembly includes a mounting base, a handle, a connecting base, and a snap-fit ​​element. The mounting base is disposed on the housing, the connecting base is adapted to be disposed on the external device, and the snap-fit ​​element is disposed on the handle.

[0013] The handle is connected to the mounting base and can rotate about a first axis, so that the snap-fit ​​can be detachably connected to the connecting base.

[0014] Optionally, the connector is provided with a slot, and the snap-fit ​​component can snap into the slot.

[0015] Optionally, the snap-fit ​​component includes a connecting pin and a buckle. The connecting pin is disposed on the connecting seat, and the buckle is connected to the connecting pin and can rotate about a second axis so that the buckle can be detachably connected to the connecting seat; wherein, the first axis is parallel to the second axis.

[0016] Optionally, the fan includes a drive unit and an impeller, the impeller is connected to the output end of the drive unit, the impeller is located inside the accommodating cavity, and the drive unit is installed on the housing and located outside the housing.

[0017] Optionally, the hot air device further includes an inner shell, which is arranged in the accommodating cavity. The inner shell has an exhaust chamber and a heating chamber that are interconnected. The end of the exhaust chamber away from the heating chamber is connected to the air inlet, and the end of the heating chamber away from the exhaust chamber is connected to the air outlet.

[0018] The impeller is arranged in the exhaust chamber, and the heating element is arranged in the heating chamber.

[0019] Optionally, the housing includes a front cover and a rear cover, the front cover and the rear cover are connected and form the receiving cavity between them, the air inlet and the air outlet are both arranged in the front cover, the fan is installed in the rear cover, and the handle assembly is located in the rear cover.

[0020] According to the hot air device provided in this embodiment, the fan starts working after startup, drawing in air from the air inlet and generating airflow. The air generated by the fan is delivered to the receiving cavity, where the heating element heats the air, raising its temperature. The fan continues to work, delivering the heated air to the outside of the casing through the air outlet. In practical applications, this hot air can be used for preheating the surface of the battery cell. The handle assembly detachably connects the casing to an external device. When maintenance, repair, or replacement of the hot air device is required, the operator can easily remove the casing from the external device using the handle assembly; when reinstallation is required, the handle assembly is used to fix the casing to the external device. Compared to the prior art where the hot air pack is fixed to the external device by welding, this invention achieves a detachable connection between the casing and the external device through the handle assembly, making the disassembly and assembly process of the hot air device simpler and faster, greatly saving maintenance and repair time and costs. When the hot air device malfunctions or requires replacement of parts, it can be disassembled and repaired promptly, ensuring the continuity and stability of the production process.

[0021] This utility model provides a preheating device, including an external device and the aforementioned hot air device. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a first-view structural schematic diagram of the hot air device provided in one embodiment of the present invention;

[0024] Figure 2 This is a second-view structural schematic diagram of the hot air device provided in one embodiment of the present invention;

[0025] Figure 3 This is an exploded view of a hot air device provided in one embodiment of the present invention;

[0026] Figure 4 for Figure 1 A magnified view of A;

[0027] Figure 5 This is a schematic diagram of the internal structure of the hot air device provided in one embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the internal structure of the hot air device provided in another embodiment of the present invention.

[0029] The reference numerals in the accompanying drawings are as follows:

[0030] 1. Handle assembly; 11. Mounting base; 12. Handle; 13. Connecting base; 131. Slot; 14. Snap-fit ​​component; 141. Connecting pin; 142. Buckle; 2. Heating element; 21. Heating pack; 211. Inspection window; 212. Maintenance door; 22. Heating tube; 3. Outer shell; 31. Front cover; 32. Rear shell; 4. Fan; 41. Drive unit; 42. Impeller; 5. Air inlet; 6. Air outlet; 7. Receptacle cavity; 8. Inner shell; 81. Exhaust cavity; 82. Heating cavity. Detailed Implementation

[0031] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0032] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of 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.

[0034] like Figures 1 to 6 As shown, an embodiment of the present invention provides a hot air device, including a housing 3, a fan 4 and a heating element 2. The housing 3 has an internal accommodating cavity 7, and the housing 3 has an air inlet 5 and an air outlet 6 spaced apart from each other. The air inlet 5, the accommodating cavity 7 and the air outlet 6 are connected in sequence.

[0035] The heating element 2 and the fan 4 are both arranged in the accommodating cavity 7. Under the action of the fan 4, the airflow enters the accommodating cavity 7 through the air inlet 5, and after being heated by the heating element 2, it is discharged to the outside of the outer shell 3 through the air outlet 6.

[0036] The hot air device also includes at least one handle assembly 1, which is arranged on the outer casing 3. The handle assembly 1 is located outside the outer casing 3 and can be detachably connected to external equipment. In this embodiment, the handle assembly 1 allows the outer casing 3 to be quickly separated from or connected to external equipment, avoiding the difficulties of disassembly and assembly caused by welding fixation, and greatly reducing the time and labor intensity of maintenance and replacement of parts. When the fan 4, heating element 2, or other components malfunction, the hot air device can be quickly disassembled from the external equipment, facilitating the inspection and maintenance of the internal structure. It is understood that the heating element 2 and the fan 4 are both arranged in the accommodating cavity 7, which means that at least a part of the heating element 2 and the fan 4 are both arranged in the accommodating cavity 7. It may be that only the heating area of ​​the heating element 2 and / or the output end (impeller 42) of the fan 4 is located in the accommodating cavity 7, or the entire heating element 2 and / or the fan 4 is arranged in the accommodating cavity 7. At the same time, the handle assembly in this embodiment is arranged outside the outer casing 3, so that the operator does not need to touch the high-temperature components or complex structures inside the outer casing 3, and can directly complete the installation, disassembly, and adjustment actions through the external handle. To avoid the risk of burns or electric shock to operators from contact with high-temperature areas or live parts inside the housing 3 (such as heating zones), the external, independent handle assembly 1 can be designed with heat-insulating material or kept away from heat sources, further ensuring operational safety. Furthermore, the external handle assembly 1 does not occupy space in the internal cavity 7 of the housing 3, allowing for a more compact arrangement of core functional components within the cavity 7, optimizing internal airflow paths (such as more flexible layout of air inlets and outlets), and improving hot air generation efficiency.

[0037] In one embodiment, there are multiple handle assemblies 1, which are arranged at intervals on the housing 3. In this embodiment, the multiple handle assemblies 1 are arranged at intervals to distribute the connection force between the hot air device and the external equipment to different positions on the housing 3, acting like multiple fulcrums to support the device and prevent excessive local stress. Even if vibration occurs during device operation, the hot air device remains firmly connected and will not easily loosen or detach, ensuring the stable operation of the battery cell preheating process. Simultaneously, multiple handle assemblies 1 provide operators with more leverage points when assembling and disassembling the hot air device, allowing them to select the appropriate handle 12 for operation based on the actual situation. For example, during disassembly, multiple handles 12 can be operated simultaneously to separate the snap-fit ​​14 from the connector 13 with less effort; during installation, the hot air device can be quickly fixed by cooperating with different handles 12, which is particularly suitable for hot air devices with larger size and weight, reducing the operator's workload.

[0038] In one embodiment, a first direction, a second direction, and a third direction that are perpendicular to each other are defined. The airflow enters the fan 4 from the air inlet 5 along the third direction and passes through the heating element 2 along the first direction.

[0039] Two handle assemblies 1 are spaced apart on the outer casing 3 along a first direction, and a fan 4 is located between the two handle assemblies 1. In this embodiment, the outer casing 3 has a first end and a second end opposite to each other along the first direction, and each of the first and second ends is provided with a handle assembly 1. Along the first direction, the fan 4 is located between the handle assembly 1 at the first end and the handle assembly 1 at the second end. The first direction is a vertical direction, or, the first direction is an auxiliary direction. Figure 2 The Z-direction. The second direction is the left and right direction, or, the second direction is the adjacent direction. Figure 2 The X direction in the middle. The third direction is the front-back direction, or, the third direction is the adjacent direction. Figure 2 The Y-direction is defined in the first, second, and third directions. It is understood that the airflow is bidirectional, entering the accommodating cavity 7 through the air inlet 5 in the third direction. After being heated by the heating element 2, the airflow is discharged to the outside of the outer casing 3 through the air outlet 6 in the third direction. Handle assemblies 1 are provided at both the first and second ends of the outer casing 3, forming a symmetrical fixed structure at both ends. This ensures that the connection force between the hot air device and the external equipment is evenly distributed across both ends of the outer casing 3. For example, when the external equipment has mounting interfaces on both sides, the handle assemblies 1 at both ends can be simultaneously engaged, preventing the outer casing 3 from tilting or twisting due to unilateral force. This ensures that internal components such as the fan 4 and the heating element 2 remain in a horizontal and stable state, preventing component displacement or damage due to vibration. In other embodiments, the heating element 2 is also located between the handle assembly 1 at the first end and the handle assembly 1 at the second end.

[0040] In one embodiment, the two handle assemblies 1 are spaced apart from each other on the housing 3 along a second direction. In this embodiment, the second direction is a left-right direction, or, the second direction is an adjacent direction. Figure 2 The handle assemblies 1 are spaced apart along the second direction on the outer casing 3, forming a multi-point symmetrical fixing structure with the handle assemblies 1 spaced apart along the first direction. External forces, whether horizontal or vertical, can be evenly distributed through the multiple handle assemblies 1, avoiding excessive localized stress. For example, in a vibration environment generated during equipment operation, multi-point fixing can effectively suppress the displacement and shaking of the hot air device, ensuring stable hot air output and improving the uniformity and consistency of battery cell preheating. Simultaneously, the multiple handle assemblies 1 provide more mounting leverage points and positioning reference points. During installation, operators can quickly align the external equipment interface using the handles 12 on both sides, significantly reducing installation deviation; during disassembly, simultaneously operating the handles 12 on both sides allows for easier separation of the snap-fit ​​parts 14, significantly improving disassembly and assembly efficiency and reducing equipment maintenance time costs.

[0041] like Figures 1 to 4As shown, in one embodiment, the handle assembly 1 includes a mounting base 11, a handle 12, a connecting base 13, and a snap-fit ​​member 14. The mounting base 11 is disposed on the housing 3, the connecting base 13 is adapted to be disposed on an external device, and the snap-fit ​​member 14 is disposed on the handle 12.

[0042] The handle 12 is connected to the mounting base 11 and can rotate around a first axis, allowing the snap-fit ​​member 14 to be detachably connected to the connecting base 13. In this embodiment, the first axis extends along the Z-direction, or it extends vertically. By rotating the handle 12, the snap-fit ​​member 14 can be quickly connected and disconnected from the connecting base 13, making the assembly and disassembly of the hot air device simpler and faster, eliminating the need for complex tools or cumbersome steps, and greatly improving operational efficiency. The detachable connection between the snap-fit ​​member 14 and the connecting base 13 ensures that the hot air device is securely installed on external equipment, preventing the device from loosening or falling off due to vibration or other external forces, thereby ensuring the stability of the hot air device during operation.

[0043] like Figure 4 As shown, in one embodiment, the connecting seat 13 is provided with a slot 131, and the snap-fit ​​member 14 can snap into the slot 131. In this embodiment, during installation, by rotating the handle 12, the snap-fit ​​member 14 is gradually inserted into the slot 131. Rotating the handle 12 continues until the snap-fit ​​member 14 is fully engaged in the slot 131, completing the connection between the hot air device and the external device. During disassembly, rotating the handle 12 in the opposite direction gradually releases the snap-fit ​​member 14 from the slot 131. Rotating the handle 12 continues until the snap-fit ​​member 14 is completely disengaged from the slot 131, allowing the hot air device to be removed from the external device, completing the disassembly. The design of the slot and the snap-fit ​​member 14 ensures a secure connection between the hot air device and the external device. After the snap-fit ​​member 14 is inserted into the slot 131, a tight mechanical connection is formed between the two, effectively preventing the hot air device from loosening or falling off due to vibration or other external forces during operation.

[0044] like Figure 4As shown, in one embodiment, the snap-fit ​​component 14 includes a connecting pin 141 and a snap fastener 142. The connecting pin 141 is disposed on the connecting seat 13, and the snap fastener 142 is connected to the connecting pin 141 and can rotate about a second axis, so that the snap fastener 142 can be detachably connected to the connecting seat 13; wherein, the first axis and the second axis are parallel. In this embodiment, both the first axis and the second axis extend along the Z direction. When the hot air device is not installed, the snap fastener 142 is in the initial position where it is not snapped with the connecting seat 13, and at this time the snap fastener 142 can rotate freely about the second axis relative to the connecting pin 141. When it is necessary to install the hot air device onto an external device, the operator first uses the handle 12 (rotating the handle 12 about the first axis drives the relevant structure to initially position the hot air device near the connecting seat 13) to roughly align the hot air device with the connecting seat 13. Then, the operator manually operates the snap fastener 142 to rotate it about the second axis to a state corresponding to the corresponding snap-fit ​​position on the connecting seat 13. Continue operating the latch 142 until it engages with the corresponding engagement point on the connector 13, achieving a detachable connection between the latch 142 and the connector 13, thus securely installing the hot air device on the external equipment. When it is necessary to disassemble the hot air device, the operator reverses the operation of the latch 142, causing it to rotate around the second axis and disengage from the engagement point on the connector 13, releasing the engagement. Then, the hot air device can be removed from the external equipment using the handle 12 and other structures. The latch 142 rotates around the second axis to achieve engagement and disengagement with the connector 13. The operation is simple and easy to understand, allowing operators to easily complete installation and disassembly without complex training, reducing operational difficulty and labor costs. When the hot air device malfunctions or requires maintenance, it can be quickly disassembled for inspection and maintenance. After maintenance, it can be quickly reinstalled, reducing the difficulty and time cost of maintenance work and improving the maintainability of the equipment.

[0045] like Figure 3 As shown, in one embodiment, the heating component 2 includes a heating pack 21 and several heating tubes 22. The heating tubes 22 are connected to the heating pack 21 and have heating areas. The heating pack 21 is located outside the housing 3. In this embodiment, the heating tubes 22 can be connected in different ways (such as star connection or delta connection) according to different voltage and power requirements to adapt to different power supply conditions. The heating pack 21 can be equipped with a power supply to power the heating tubes 22, or it can be powered by an external power supply, so that the heating tubes 22 heat the air delivered by the fan 4. The heating pack 21 is located externally, which facilitates the maintenance of the power supply line or heat dissipation system and reduces downtime.

[0046] In one embodiment, there are multiple heating elements 22 arranged sequentially along a first direction. In this embodiment, the first direction is the vertical direction. The sequential arrangement of multiple heating elements 22 along the first direction significantly increases the total area of ​​the heating zone, enabling the hot air device to heat the air more evenly, reducing localized overheating or underheating, and thus improving overall heating efficiency. Simultaneously, the arrangement of the multiple heating elements 22 ensures that heat is evenly distributed within the hot air device, preventing heat concentration at a single point, thereby improving the uniformity and stability of the hot air.

[0047] like Figure 5 As shown, in one embodiment, the heating pack 21 is provided with a maintenance window 211, the installation area of ​​the heating tube 22 is located in the maintenance window 211, and the heating pack 21 has an opening on one side along a third direction, which communicates with the maintenance window 211. A maintenance door 212 is provided in the opening, and the maintenance door 212 can cover the opening. It is understood that... Figure 5 The three arrows arranged sequentially in the outer casing 3 indicate the airflow direction. In this embodiment, the inspection window 211 directly corresponds to the installation area of ​​the heating element 22. When the heating element 22 malfunctions or requires maintenance, it is not necessary to disassemble the entire heating pack 21 or other complex components. By opening the maintenance door 212, the installation area of ​​the heating element 22 can be directly accessed through the inspection window 211, allowing for quick location and handling of the problem, greatly shortening maintenance time and improving equipment maintenance efficiency. Simultaneously, when the maintenance door 212 is closed, it effectively prevents dust, debris, etc., from entering the interior of the heating pack 21, avoiding contamination or damage to the heating element 22 and other internal structures, thus protecting the internal structure of the heating pack 21 and helping to extend the service life of the heating pack 21 and the heating element 22.

[0048] In one embodiment, the maintenance door 212 is detachably connected to the heating pack 21;

[0049] Alternatively, the maintenance door 212 can be connected to the heating pack 21 and rotate around a third axis. In this embodiment, the third axis extends vertically. When the maintenance door 212 and the heating pack 21 are detachably connected, the detachable maintenance door 212 can be completely removed when a comprehensive and in-depth inspection or replacement of multiple components is required inside the heating pack 21. This leaves the entire opening open, providing unobstructed operating space for maintenance personnel, facilitating the inspection, repair, and replacement of parts in every corner of the heating pack 21, and enabling a more thorough resolution of equipment malfunctions. When the maintenance door 212 is rotatably connected to the heating pack 21, it is not necessary to completely disassemble the maintenance door 212; it can be opened or closed simply by rotating around the third axis, making operation simple and quick. During routine inspections or simple maintenance, the maintenance door 212 can be quickly opened to expose the inspection window 211, facilitating inspection and operation by maintenance personnel, saving maintenance time, and improving work efficiency.

[0050] like Figure 3 and Figure 5 As shown, in one embodiment, the fan 4 includes a drive device 41 and an impeller 42. The impeller 42 is connected to the output end of the drive device 41 and is located in the accommodating cavity 7.

[0051] The drive unit 41 is mounted on the housing 3 and located outside the housing 3. In this embodiment, the drive unit 41 can be a motor, and it can be mounted on the housing 3 via a mounting plate. The drive unit 41 delivers air by driving the rotation of the impeller 42. Because the drive unit 41 is located outside the housing 3, it facilitates heat dissipation. Maintenance personnel can quickly access the drive unit 41 for inspection, maintenance, or replacement without disassembling the housing 3, greatly reducing maintenance time and workload.

[0052] like Figure 3 As shown, in one embodiment, the hot air device further includes an inner shell 8, which is arranged in the accommodating cavity 7. The inner shell 8 has an exhaust cavity 81 and a heating cavity 82 that are interconnected inside. The end of the exhaust cavity 81 that is away from the heating cavity 82 is connected to the air inlet 5, and the end of the heating cavity 82 that is away from the exhaust cavity 81 is connected to the air outlet 6.

[0053] Impeller 42 is arranged in exhaust chamber 81, and heating element 2 is arranged in heating chamber 82. In this embodiment, insulation cotton is provided between outer shell 3 and inner shell 8 to prevent heat leakage. At the same time, a temperature sensor is provided at air outlet 6 to detect the temperature, making temperature regulation more precise. Separating exhaust chamber 81 and heating chamber 82 allows air to pass through exhaust chamber 81 before entering heating chamber 82, where it is initially accelerated by impeller 42. The segmented design allows the air to stay in heating chamber 82 for a longer time, resulting in more thorough heat exchange with heating element 2, thereby improving heating efficiency. Meanwhile, the heating zone is located in heating chamber 82, isolated from exhaust chamber 81 and impeller 42, reducing direct contact between high-temperature heating elements and high-speed rotating components such as impeller 42, and reducing safety risks caused by high temperatures.

[0054] like Figures 1 to 3 As shown, in one embodiment, the outer casing 3 includes a front cover 31 and a rear casing 32, which are connected to form a cavity 7. An air inlet 5 and an air outlet 6 are both located on the front cover 31. In this embodiment, sealing strips are provided on both the air outlet 6 and the air inlet 5 to prevent air leakage between the outer casing 3 and external equipment. A fan 4 is installed on the rear casing 32, and a handle assembly 1 is located on the rear casing 32. The connection design between the front cover 31 and the rear casing 32 ensures the airtightness of the outer casing 3 during normal operation, preventing the entry of external impurities such as dust and moisture, thus improving the safety and reliability of the equipment.

[0055] According to the hot air device provided in this embodiment, the fan 4 starts working after being turned on, drawing in air from the air inlet 5 and generating airflow. After the air generated by the fan 4 is delivered to the receiving cavity 7, the heating element 2 heats the air, raising its temperature. The fan 4 continues to work, delivering the heated hot air through the air outlet 6 to the outside of the outer casing 3. In practical applications, this hot air can be used to preheat the surface of the battery cell (cell). The handle assembly 1 detachably connects the outer casing 3 to an external device. When maintenance, repair, or replacement of the hot air device is required, the operator can easily remove the outer casing 3 from the external device using the handle assembly 1; when reinstallation is required, the handle assembly 1 is used to fix the outer casing 3 to the external device. Compared to the prior art where the hot air pack is fixed to the external device by welding, this invention achieves a detachable connection between the outer casing 3 and the external device through the handle assembly 1, making the disassembly and assembly process of the hot air device simpler and faster, greatly saving maintenance and repair time and costs. When the hot air unit malfunctions or requires replacement of parts, it can be disassembled and repaired in a timely manner to ensure the continuity and stability of the production process.

[0056] In addition, this utility model provides a preheating device, including an external device and the hot air device described in the above embodiment. In this embodiment, the external device can be a heating furnace.

[0057] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A hot air device, characterized in that The device includes a housing, a fan, and a heating element. The housing has an internal cavity and an air inlet and an air outlet spaced apart from each other. The air inlet, the cavity, and the air outlet are connected in sequence. Both the heating element and the fan are disposed in the accommodating cavity. Under the action of the fan, the airflow enters the accommodating cavity through the air inlet, and after being heated by the heating element, it is discharged to the outside of the outer shell through the air outlet. The hot air device also includes at least one handle assembly, which is disposed in the housing and detachably connected to an external device.

2. The hot air device according to claim 1, characterized in that The number of handle assemblies is multiple, and the multiple handle assemblies are arranged in the housing at intervals.

3. The hot air device of claim 2, wherein Define a first direction, a second direction, and a third direction that are perpendicular to each other. The airflow enters the fan from the air inlet along the third direction and passes through the heating component along the first direction. The two handle assemblies are spaced apart on the housing along the first direction, and the fan is located between the two handle assemblies.

4. The hot air device of claim 3, wherein The two handle assemblies are spaced apart on the housing along the second direction.

5. The hot air device of claim 1, wherein The handle assembly includes a mounting base, a handle, a connecting base, and a snap-fit ​​component. The mounting base is disposed on the housing, the connecting base is adapted to be disposed on the external device, and the snap-fit ​​component is disposed on the handle. The handle is connected to the mounting base and can rotate about a first axis, so that the snap-fit ​​can be detachably connected to the connecting base.

6. The hot air device of claim 5, wherein The connector is provided with a slot, and the snap-fit ​​component can snap into the slot.

7. The hot air device of claim 5, wherein The snap-fit ​​component includes a connecting pin and a buckle. The connecting pin is arranged on the connecting seat, and the buckle is connected to the connecting pin and can rotate about a second axis so that the buckle can be detachably connected to the connecting seat; wherein, the first axis is parallel to the second axis.

8. The hot air device of claim 1, wherein The fan includes a drive unit and an impeller. The impeller is connected to the output end of the drive unit and is located inside the accommodating cavity. The drive unit is installed on the housing and is located outside the housing.

9. The hot air device of claim 8, wherein The hot air device also includes an inner shell, which is arranged in the accommodating cavity. The inner shell has an exhaust chamber and a heating chamber that are interconnected. The end of the exhaust chamber away from the heating chamber is connected to the air inlet, and the end of the heating chamber away from the exhaust chamber is connected to the air outlet. The impeller is arranged in the exhaust chamber, and the heating element is arranged in the heating chamber.

10. The hot air device according to any one of claims 1 to 9, characterized in that The outer casing includes a front cover and a rear cover, the front cover and the rear cover are connected and form the accommodating cavity between them, the air inlet and the air outlet are both arranged in the front cover, the fan is installed in the rear cover, and the handle assembly is located in the rear cover.

11. A preheating apparatus, characterized by Includes external equipment and the hot air device according to any one of claims 1 to 10.

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