Air duct assembly and air blowing equipment

Abstract

The utility model discloses an air duct assembly and air blowing equipment. The air duct assembly comprises a duct body, a heating structure, a circuit structure and a functional device. The duct body is provided with an air inlet and an air outlet. The heating structure is arranged in the cylinder main body and comprises a heating bracket which is annularly arranged; the circuit structure is arranged in the barrel body and located on the side, opposite to the air outlet, of the heating structure, and the circuit structure comprises a circuit support arranged in an annular shape and a circuit board connected with the circuit support; the inner ring side of the heating support and the inner ring side of the circuit support are communicated to jointly define a containing cavity, and the circuit board is located at one end of the containing cavity, so that at least part of components located on the circuit board are contained in the containing cavity; and the functional device is accommodated in the accommodating cavity. According to the technical scheme provided by the utility model, the internal structure of the air duct assembly is more compact, the occupied space is smaller, and the size can be smaller, so that the size of the air blowing equipment is smaller.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of household appliances, in particular to a wind tube assembly and blowing equipment. BACKGROUND

[0002] Blowing equipment, such as hair dryer, blows out by forming hot air current to be used for drying hair and clothes. Heating structure and circuit structure are arranged inside the hair dryer, the heating structure can be controlled to work through the circuit structure, and the air current can be heated through the heating structure to form hot air blowing out. However, the heating structure and the circuit structure need to be fixed in the shell of the hair dryer through the installation support, so that the components are more, the installation space required is larger, the volume of the whole hair dryer is also larger, and the design requirement of miniaturization of the hair dryer cannot be met. SUMMARY

[0003] In order to solve the above technical problems, the main purpose of the utility model is to provide a wind tube assembly and blowing equipment, which aims to solve the problem that the traditional hair dryer has more components and needs more installation space, so that the volume of the hair dryer is large and the design requirement of miniaturization of the hair dryer cannot be met.

[0004] In order to achieve the above purpose, the utility model provides a wind tube assembly, which comprises:

[0005] The barrel main body is provided with an air inlet and an air outlet.

[0006] The heating structure is arranged in the barrel main body and comprises a heating support arranged in a ring shape.

[0007] The circuit structure is arranged in the barrel main body and located on the side of the heating structure away from the air outlet. The circuit structure comprises a circuit support arranged in a ring shape and a circuit board connected with the circuit support. The inner ring side of the heating support and the inner ring side of the circuit support are communicated to jointly form a containing cavity. The circuit board is located at one end of the containing cavity, so that at least part of the components located thereon is contained in the containing cavity.

[0008] The functional device is contained in the containing cavity.

[0009] Optionally, the heating support comprises a heating inner ring part, a heating outer ring part sleeved on the outer side of the heating inner ring part, and a plurality of first connecting plates connected between the heating inner ring part and the heating outer ring part. The heating outer ring part and the heating inner ring part form an air passing gap therebetween, and the plurality of first connecting plates are arranged in a spaced manner along the circumference of the heating inner ring part.

[0010] The heating structure further comprises a heating coil, the heating coil is wound on the plurality of first connecting plates, and the functional device is arranged on the inner side of the heating inner ring part.

[0011] Optionally, the heating structure further comprises a fixing sleeve, the fixing sleeve is sleeved outside the heating outer ring portion and connects the heating inner ring portion and the barrel body, an end wall is arranged at one end of the fixing sleeve in the axial direction of the barrel body, and a wind passing hole is arranged on the end wall and communicates with the wind passing gap.

[0012] Optionally, a plurality of buckles are arranged on the inner side of the heating inner ring portion in a circumferential direction of the heating inner ring portion and are used for clamping and fixing the functional device; and / or,

[0013] The functional device is arranged as a plasma generator or a negative ion generator.

[0014] Optionally, the air outlet is formed at one end of the barrel body in the axial direction, the end wall is arranged at one end of the fixing sleeve close to the air outlet, a wind guide surface is arranged on the side of the end wall away from the air outlet, and the wind passing hole is arranged close to the edge of the end wall, wherein the wind guide surface is arranged to extend in a radial direction from the center of the fixing sleeve to the edge in the axial direction of the barrel body and in the direction of the airflow flow, so as to guide the airflow towards the wind passing hole.

[0015] Optionally, a wind guide groove is formed on the end wall, the wind guide groove is arranged to be recessed towards the inside of the fixing sleeve, the wind guide surface is arranged on the outer circumferential side of the wind guide groove away from the air outlet, and the wind passing hole is arranged on one side of the slot of the wind guide groove, and at least part of the wind guide groove can extend into the heating inner ring portion.

[0016] Optionally, a plurality of first threaded studs are arranged on the side of the wind guide groove away from the air outlet, a plurality of first mounting holes are arranged on the ring side wall of the heating inner ring portion, and the plurality of first threaded studs and the plurality of first mounting holes are arranged one by one.

[0017] Optionally, the circuit support comprises a support inner ring portion and a support outer ring portion, and a second connecting plate connected between the support inner ring portion and the support outer ring portion, the support outer ring portion is sleeved outside the support inner ring portion and is arranged to be close to the barrel body, the support inner ring portion is arranged to be in relative communication with the heating inner ring portion and is connected with the fixing sleeve and the heating inner ring portion.

[0018] Optionally, the circuit board is arranged on the side of the second connecting plate away from the heating structure, and the components and elements arranged on the circuit board extend into the inside of the support inner ring portion.

[0019] The outer ring part of the support is provided with a first through hole corresponding to the air inlet, and the second connecting plate is provided with a second through hole in communication with the first through hole; after the airflow enters the cylinder main body from the air inlet, the airflow enters the outer ring part of the support through the first through hole, and then flows to the circuit board through the second through hole, and then flows towards the inner ring part of the support, so as to flow into the heating inner ring part and then flow towards the air guide groove; and / or,

[0020] The inner ring part of the support is provided with a plurality of second mounting holes, and the plurality of second mounting holes are arranged in one-to-one correspondence with the plurality of first mounting holes; the air cylinder assembly further comprises a connecting piece, which is arranged in the corresponding first stud, first mounting hole and second mounting hole to connect the fixing sleeve, heating support and circuit support.

[0021] The utility model also provides a kind of hair dryer, including above-mentioned air cylinder assembly.

[0022] The technical scheme provided by the utility model has the following beneficial effects:

[0023] The air cylinder assembly provided by the utility model comprises a cylinder main body, a heating structure, a circuit structure and functional devices, wherein an air inlet and an air outlet are provided on the cylinder main body, the heating structure and the circuit structure are arranged in the cylinder main body, the heating structure comprises a heating support, the heating coil can be fixed by the heating support, the circuit structure comprises a circuit support and a circuit board, the circuit board can be fixed in the cylinder main body by the circuit support, the heating support and the circuit support are arranged in a ring shape, so that the electronic components, heating coil and functional devices on the circuit board can be located in the accommodation cavity formed by the inner cavities of the heating support and the circuit support, and the space outside the heating support and the circuit support is not occupied, the structure is more compact, the occupied space is smaller, so that the volume of the entire air cylinder assembly can be smaller, and the volume of the hair dryer is also smaller. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme of the embodiments of the utility model or the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced below, and obviously, the drawings in the following description can only be some embodiments of the utility model, and other drawings can also be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0025] Figure 1 It is an embodiment of the structure of the air cylinder assembly provided by the utility model.

[0026] Figure 2 It is Figure 1A sectional structure schematic view of the air duct assembly in the utility model;

[0027] Figure 3 For Figure 1 An exploded structure schematic view of the air duct assembly in the utility model;

[0028] Figure 4 For Figure 1 A structure schematic view of the fixing sleeve in the utility model;

[0029] Figure 5 For Figure 4 Another structure schematic view of the fixing sleeve in the utility model from another perspective;

[0030] Figure 6 For Figure 1 A structure schematic view of the heating support in the utility model;

[0031] Figure 7 For Figure 6 Another structure schematic view of the heating support in the utility model from another perspective;

[0032] Figure 8 For Figure 1 A structure schematic view of the circuit support in the utility model;

[0033] Figure 9 A sectional structure schematic view of one embodiment of the blowing equipment provided by the utility model.

[0034] Explanation of the attached drawing labels:

[0035] 1000 - blowing equipment; 100 - air duct assembly; 1 - barrel main body; 2 - heating structure; 21 - heating support; 211 - heating inner ring part; 2111 - buckle; 2112 - first mounting hole; 212 - heating outer ring part; 213 - first connecting plate; 22 - fixing sleeve; 221 - air guide groove; 222 - air passing hole; 223 - first threaded stud; 3 - circuit structure; 31 - circuit support; 311 - support inner ring part; 3111 - second mounting hole; 312 - support outer ring part; 313 - second connecting plate; 32 - circuit board; 200 - handle structure; 300 - air flow generating device.

[0036] The realization of the utility model, functional features and excellent effects will be further explained below in combination with specific embodiments and the attached drawings. Specific embodiments

[0037] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0038] It should be noted that if the present application embodiments involve directional indications, the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0039] In addition, if the present application embodiments involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes A scheme, or B scheme, or A and B simultaneously satisfied scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0040] The present application provides a kind of wind tube subassembly 100, the wind tube subassembly 100 is suitable for blowing equipment 1000, such as hair dryer, dryer etc. The following is for easy explanation, with the wind tube subassembly 100 is suitable for hair dryer as an example, the specific structure of the wind tube subassembly 100 is explained.

[0041] Specifically, please refer to Figure 1 And Figure 2In the embodiment, the air duct assembly 100 comprises a duct body 1, a heating structure 2, a circuit structure 3, and functional devices, the duct body 1 is provided with an air inlet and an air outlet; the heating structure 2 is arranged in the duct body 1 and comprises a heating bracket 21 arranged in a ring shape; the circuit structure 3 is arranged in the duct body 1 and located on the side of the heating structure 2 away from the air outlet, the circuit structure 3 comprises a circuit bracket 31 arranged in a ring shape and a circuit board 32 connected with the circuit bracket 31; the inner ring side of the heating bracket 21 and the inner ring side of the circuit bracket 31 are connected to form a containing cavity together, the circuit board 32 is located at one end of the containing cavity, so that at least part of the components on the circuit board 32 are contained in the containing cavity; the functional devices are contained in the containing cavity.

[0042] In the embodiment, the air inlet and the air outlet are arranged on the duct body 1, the heating structure 2 and the circuit structure 3 are arranged in the duct body 1, the heating structure 2 comprises a heating bracket 21 which can be used to fix a heating coil, the circuit structure 3 comprises a circuit bracket 31 and a circuit board 32, the circuit board 32 can be fixed in the duct body 1 through the circuit bracket 31; and the heating bracket 21 and the circuit bracket 31 are arranged in a ring shape, so that the electronic components on the circuit board 32, the heating coil and the functional devices can be located in the containing cavity formed by the inner cavities of the heating bracket 21 and the circuit bracket 31, and do not occupy the space outside the heating bracket 21 and the circuit bracket 31, the structure is more compact and occupies less space, so that the volume of the entire air duct assembly 100 can be smaller, and the volume of the hair dryer 1000 is also smaller.

[0043] Preferably, the heating bracket 21 and the circuit bracket 31 are coaxially arranged with the duct body 1.

[0044] Specifically, in combination with Figure 2 and Figure 3As shown, the heating bracket 21 comprises a heating inner ring portion 211, a heating outer ring portion 212 sleeved outside the heating inner ring portion 211, and a plurality of first connecting plates 213 connected between the heating inner ring portion 211 and the heating outer ring portion 212, a wind gap is formed between the heating outer ring portion 212 and the heating inner ring portion 211, and the first connecting plates 213 are arranged in a spaced manner along the circumference of the heating inner ring portion 211; the heating structure 2 further comprises a heating coil, which is arranged on the first connecting plates 213, and the functional device is arranged inside the heating inner ring portion 211. The heating inner ring portion 211 and the heating outer ring portion 212 are both in a cylindrical shape, and the heating inner ring portion 211 and the heating outer ring portion 212 are coaxially arranged. The space occupied by the heating structure 2 is the space occupied by the heating outer ring portion 212, and the heating coil and the functional device are both accommodated in the heating outer ring portion 212, so that the structure is more compact and the occupied space is smaller. Moreover, the wind gap formed between the heating inner ring portion 211 and the heating outer ring portion 212 is uniformly separated by the first connecting plates 213, so that the airflow distribution is more uniform, and the air outlet is also more uniform.

[0045] Further, as shown in Figure 2 , Figure 6 and Figure 7 , the heating structure 2 further comprises a fixing sleeve 22, which is also substantially in a cylindrical shape, the fixing sleeve 22 is sleeved outside the heating outer ring portion 212 and connects the heating inner ring portion 211 and the barrel body 1, the fixing sleeve 22 is provided with an end wall at one end along the axial direction of the barrel body 1, the end wall is provided with a wind hole 222, and the wind hole 222 is in communication with the wind gap. During assembly, the heating inner ring portion 211, the heating outer ring portion 212 and the heating coil can be assembled into an integral whole, and then the integral whole formed by the heating inner ring portion 211, the heating outer ring portion 212 and the heating coil is fixed in the barrel body 1 through the fixing sleeve 22, so that the assembly of the heating inner ring portion 211, the heating outer ring portion 212 and the heating coil is not limited by the space inside the barrel body 1, the assembly is more convenient, and it is also convenient to maintain each component of the heating assembly.

[0046] After the fixing sleeve 22 is connected with the integral whole formed by the heating inner ring portion 211, the heating outer ring portion 212 and the heating coil, the fixing sleeve 22 can be pushed into the barrel body 1 along the axial direction of the barrel body 1 from the other end of the barrel body 1 to abut against the limiting protrusion inside the barrel body 1, so as to indicate that the installation is in place, and the rear end of the fixing sleeve 22 can be limited by the circuit structure 3, so that the assembly operation is simpler and faster.

[0047] Further, the end wall is arranged at one end of the fixed sleeve 22 close to the air outlet, and the end wall is provided with a guide surface on the side away from the air outlet. The air flow hole 222 is arranged close to the edge of the end wall. In the axial direction of the barrel main body 1 and in the direction of the air flow, the guide surface is arranged to extend in the radial direction from the center of the fixed sleeve 22 to the edge, so as to guide the air flow towards the air flow hole 222. The air flow is smoother, and can be blown out of the air outlet more efficiently.

[0048] Preferably, as shown in Figure 2 , Figure 4 and Figure 5 , a guide groove 221 is formed on the end wall, the guide groove 221 is arranged to be recessed towards the inside of the fixed sleeve 22, and the groove side wall of the guide groove 221 is arranged in an arc shape. The guide surface is formed on the side of the guide groove 221 away from the air outlet. The guide groove 221 is arranged in a generally trumpet shape, with the small end of the guide groove 221 facing inwards, and the large end of the guide groove 221 facing the air outlet. When the air flow flows along the groove outer side wall of the guide groove 221, it flows towards the air flow hole 222 along the groove outer side wall of the guide groove 221, so as to flow to the air outlet. The air flow hole 222 is located on the outer circumferential side of the slot of the guide groove 221. At least part of the guide groove 221 can extend into the heating inner ring part 211, so that the guide groove 221 and the heating support 21 are more compact.

[0049] In an embodiment, as shown in Figure 7 , a plurality of buckles 2111 are arranged on the inside of the heating inner ring part 211. The plurality of buckles 2111 are arranged at intervals along the circumference of the heating inner ring part 211, for clamping and fixing the functional device, so as to facilitate the disassembly and assembly of the functional device, and so that the functional device does not shake in the barrel main body 1, and the working stability is better. The functional device includes but is not limited to a plasma generator or a negative ion generator.

[0050] Among them, a plurality of first studs 223 are arranged on the side of the guide groove 221 away from the air outlet. A plurality of first mounting holes 2112 are arranged on the ring side wall of the heating inner ring part 211. The plurality of first studs 223 and the plurality of first mounting holes 2112 are arranged one by one. The guide groove 221 and the heating inner ring part 211 can be connected and fixed by connecting members penetrating the corresponding first studs 223 and first mounting holes 2112.

[0051] For the circuit support 31, in combination with Figure 3 and Figure 8As shown, the circuit support 31 comprises a support inner ring part 311 and a support outer ring part 312, and a second connecting plate 313 connected between the support inner ring part 311 and the support outer ring part 312. The support outer ring part 312 and the support inner ring part 311 are both substantially cylindrical and coaxially arranged with the barrel body 1. The support outer ring part 312 is arranged outside the support inner ring part 311 and abuts against the barrel body 1. The support inner ring part 311 is in communication with the heating inner ring part 211, and the end of the support inner ring part 311 abuts against the heating inner ring part 211. The support inner ring part 311 is connected with the fixing sleeve 22 and the heating inner ring part 211, thereby relatively connecting and fixing the heating structure 2 and the circuit structure 3.

[0052] Specifically, a plurality of second mounting holes 3111 are arranged on the support inner ring part 311, and the plurality of second mounting holes 3111 are arranged in one-to-one correspondence with the plurality of first mounting holes 2112. The air duct assembly 100 further comprises a connecting piece arranged through the corresponding first stud 223, first mounting hole 2112 and second mounting hole 3111 to connect the fixing sleeve 22, heating support 21 and circuit support 31. The connecting piece can be a screw, bolt or pin, etc. The stable and reliable connection is ensured, and the relative positions among the fixing sleeve, heating support 21 and circuit support 31 are limited.

[0053] The circuit board 32 is arranged on the side of the second connecting plate 313 away from the heating structure 2, and the components thereon extend into the inside of the support inner ring part 311. The support outer ring part 312 is provided with a first via hole at the position corresponding to the air inlet, and the second connecting plate 313 is provided with a second via hole in communication with the first via hole. After the airflow enters the barrel body 1 from the air inlet, it enters the support outer ring part 312 through the first via hole, and then flows to the circuit board 32 through the second via hole, and then flows towards the support inner ring part 311, and then flows into the heating inner ring part 211 and towards the air guide groove 221. The airflow can carry away the heat on the circuit board 32 and the components thereon, thereby effectively dissipating heat and ensuring better working effect of the circuit board 32.

[0054] The air inlet can be communicated with the air flow generating device 300, such as a fan, and a part of the cold air flow enters the passage between the outer ring part 312 of the support and the inner ring part 311 of the support, and is heated by the heating coil when flowing through the air gap, so as to flow towards the air passing hole 222; another part of the air flow can flow through the circuit board 32 from the second through hole, then flow through the heating inner ring part 211 through the inner ring part 311 of the support, and then flow to the air passing hole 222 under the guidance of the air guide groove 221. Therefore, not only the heating efficiency is higher, but also the circuit board 32 can be cooled, so that the working efficiency of the hair dryer is higher.

[0055] The utility model also provides a kind of hair-drying equipment 1000, in combination Figure 9 As shown in the drawing, the hair-drying equipment 1000 includes the above-mentioned air cylinder assembly 100, handle structure 200 communicated with air cylinder assembly 100, and air flow generating device 300 located in the inside of handle structure 200. A plurality of through holes are provided on the handle structure 200, and the air flow generating device 300 can be electrically connected with the circuit board 32. By controlling the operation of the air flow generating device 300, external air flow is introduced into the handle structure 200 through the through hole by the air flow generating device 300, and then flows towards the air inlet through the handle structure 200, so that the air flow can enter the cylinder body 1.

[0056] In one embodiment, a partition can be provided at the air inlet, which divides the air inlet into a first inlet and a second inlet. The first inlet can be communicated with the first through hole on the outer ring part 312 of the support, and the second inlet is used for wiring, so that the connecting wire between the air flow generating device 300 and the circuit board 32 can be arranged therein, so that the connecting wire can be better separated from the air flow passage, avoiding loosening of the connecting wire and affecting the normal operation of the hair-drying equipment 1000.

[0057] The above-mentioned is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure made by using the content of the utility model specification and drawings, or directly or indirectly used in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A duct assembly comprising: The application relates to a heating device, comprising: a barrel body provided with an air inlet and an air outlet; a heating structure arranged in the barrel body and comprising a heating support arranged in a ring shape; a circuit structure arranged in the barrel body and located on the side of the heating structure away from the air outlet, the circuit structure comprising a circuit support arranged in a ring shape and a circuit board connected with the circuit support; the inner ring side of the heating support and the inner ring side of the circuit support are communicated to jointly form a containing cavity, the circuit board is located at one end of the containing cavity, and at least part of components on the circuit board is contained in the containing cavity; functional devices contained in the containing cavity.

2. The duct assembly of claim 1, wherein, The heating support comprises a heating inner ring part, a heating outer ring part sleeved on the outer side of the heating inner ring part, and a plurality of first connecting plates connected between the heating inner ring part and the heating outer ring part, a wind passing gap is formed between the heating outer ring part and the heating inner ring part, and the plurality of first connecting plates are arranged at intervals along the circumference of the heating inner ring part; The heating structure further comprises a heating coil, the heating coil is arranged on the plurality of first connecting plates, and the functional devices are arranged on the inner side of the heating inner ring part.

3. The duct assembly of claim 2, wherein, The heating structure further comprises a fixing sleeve, the fixing sleeve is sleeved on the outer side of the heating outer ring part and connected with the heating inner ring part and the barrel body, one end of the fixing sleeve along the axial direction of the barrel body is provided with an end wall, the end wall is provided with a wind passing hole, and the wind passing hole is communicated with the wind passing gap.

4. The duct assembly of claim 3, wherein, The inner side of the heating inner ring part is protrudingly provided with a plurality of buckles arranged at intervals along the circumference of the heating inner ring part and used for clamping and fixing the functional devices; and / or The functional devices are arranged as plasma generators or negative ion generators.

5. The duct assembly of claim 3, wherein The air outlet is formed at one end of the barrel body along the axial direction, the end wall is arranged at one end of the fixing sleeve close to the air outlet, the end wall is provided with a wind guide surface on the side away from the air outlet, the wind passing hole is arranged close to the edge of the end wall, and the wind guide surface is arranged to be inclined and extended from the center of the fixing sleeve to the edge direction in the radial direction, so that the air flow is guided towards the wind passing hole.

6. The duct assembly of claim 5, wherein, The end wall is provided with a wind guide groove recessed towards the inside of the fixing sleeve, the wind guide surface is formed on the outer circumferential side of the wind guide groove away from the air outlet, the wind passing hole is located on one side of the slot of the wind guide groove, and at least part of the wind guide groove can extend into the heating inner ring part.

7. The duct assembly of claim 6, wherein The side of the wind guide groove away from the air outlet is protrudingly provided with a plurality of first studs, and the ring side wall of the heating inner ring part is provided with a plurality of first mounting holes, the plurality of first studs and the plurality of first mounting holes are arranged one by one.

8. The duct assembly of claim 7, wherein, The circuit support comprises a support inner ring part and a support outer ring part and a second connecting plate connected between the support inner ring part and the support outer ring part, the support outer ring part is sleeved on the outer side of the support inner ring part and abuts against the barrel body, the support inner ring part is arranged in opposite communication with the heating inner ring part and is connected with the fixing sleeve and the heating inner ring part.

9. The duct assembly of claim 8, wherein, The circuit board is arranged on the side of the second connecting plate opposite to the heating structure, and the components on the circuit board extend into the inner side of the inner ring part of the support; The outer ring part of the support is provided with a first through hole corresponding to the air inlet, and the second connecting plate is provided with a second through hole in communication with the first through hole; after the airflow enters the cylinder body from the air inlet, the airflow enters the outer ring part of the support through the first through hole, and then flows to the circuit board through the second through hole, and then flows towards the inner ring part of the support, so as to flow into the heating inner ring part and then flow towards the air guide groove; and / or, The inner ring part of the support is provided with a plurality of second mounting holes, and the plurality of second mounting holes are arranged in one-to-one correspondence with the plurality of first mounting holes; the air cylinder assembly further comprises a connecting piece, the connecting piece is arranged in the corresponding first stud, first mounting hole and second mounting hole, so as to connect the fixing sleeve, the heating support and the circuit support.

10. A blow-off apparatus characterized by comprising: The air cylinder assembly comprises the air cylinder assembly according to any one of claims 1 to 9.

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