CN114992714B

CN114992714B - Warm-air drier

Info

Publication number: CN114992714B
Application number: CN202210690260.0A
Authority: CN
Inventors: 王汉文; 李小静; 张俊强; 张毅; 沈钊; 杨良玉
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2024-05-28
Anticipated expiration: 2042-06-17
Also published as: CN114992714A; WO2023240976A1

Abstract

The invention provides a warm air blower, which comprises a shell, a plurality of centrifugal wind wheels and a heating assembly, wherein the shell is provided with an exhaust air duct and at least one air inlet duct, the shell is also provided with an exhaust outlet and at least two air inlets, the exhaust air duct is communicated with the exhaust outlet, and the same air inlet duct is communicated with the at least two air inlets; at least one centrifugal wind wheel is arranged in the air inlet duct; the heating component is arranged at the position where the air inlet duct is communicated with the air outlet duct so as to heat the air blown out by the centrifugal wind wheel and discharge the air from the air outlet. The invention solves the problems that the wall-mounted fan heater in the prior art has larger size of the whole machine due to longer length of the cross-flow wind wheel, and the cross-flow wind wheel is easy to deform when the rotating speed is larger.

Description

Warm-air drier

Technical Field

The invention relates to the technical field of heating equipment, in particular to a warm air blower.

Background

In the prior art, the heating range of the wall-mounted fan heater is enlarged by increasing the air outlet of the wall-mounted fan heater, the wall-mounted fan heater which adopts the axial flow fan blade partially needs the axial flow fan blade to increase in size due to the increase in size of the air outlet, so that the wall-mounted fan heater is larger in overall size, and the wall-mounted fan heater which adopts the cross flow wind wheel partially needs the cross flow wind wheel due to the increase in size of the air outlet is longer in length, so that the wall-mounted fan heater is also larger in overall size.

However, after the length of the cross-flow wind wheel is lengthened, an asynchronous motor with larger torque is required to drive, and when the rotating speed is larger, the risk of deformation of the cross-flow wind wheel is easily caused, so that the overall performance of the wall-mounted fan heater is affected.

Disclosure of Invention

The invention mainly aims to provide a warm air blower, which solves the problems that in the prior art, the wall-mounted warm air blower has a large size due to a long length of a cross flow wind wheel, and the cross flow wind wheel is easy to deform when the rotating speed is large.

In order to achieve the above purpose, the invention provides a warm air blower, which comprises a shell, a plurality of centrifugal wind wheels and a heating assembly, wherein the shell is provided with an air exhaust duct and at least one air inlet duct, the shell is also provided with an air outlet and at least two air inlets, wherein the air exhaust duct is communicated with the air outlet, and the same air inlet duct is communicated with the at least two air inlets; at least one centrifugal wind wheel is arranged in the air inlet duct; the heating component is arranged at the position where the air inlet duct is communicated with the air outlet duct so as to heat the air blown out by the centrifugal wind wheel and discharge the air from the air outlet.

Further, the plurality of centrifugal wind wheels are coaxially arranged, the fan heater further comprises at least one driving part, two adjacent centrifugal wind wheels are driven by the same driving part, or different centrifugal wind wheels are driven by the corresponding driving parts.

Further, the shell comprises a base, wherein at least two air inlets are formed in the base, the air inlets are arranged at intervals along the length direction of the base, and a centrifugal wind wheel is arranged between two adjacent air inlets communicated with the same air inlet channel; the base includes base body and mounting groove structure, and the mounting groove structure sets up on the base body, and the cell wall of mounting groove structure personally submits the slide form, is the exit orientation heating element of slide form's mounting groove structure to intercommunication air inlet duct and exhaust wind channel, centrifugal wind wheel's at least a portion sets up in the mounting groove structure.

Further, at least a part of the inner wall surface of the base body bulges to form a second air inlet structure, the two sides of the second air inlet structure are respectively provided with a mounting groove structure, the second air inlet structure is provided with an air inlet, and the air inlet is respectively communicated with the mounting groove structures on the two sides.

Further, the plurality of air inlets comprise at least one first sub air inlet and at least one second sub air inlet, the cross section of the second air inlet structure is trapezoid, and the second sub air inlets are formed in two inclined oblique sides of the trapezoid second air inlet structure.

Further, in the thickness direction of the base body, the height of the second air inlet structure is higher than the height of the geometric center line of the air duct inlet.

Further, the slope from the first end to the second end of the inclined edge of the second air inlet structure in the trapezoid shape is A, wherein A is more than or equal to 70 degrees and less than or equal to 85 degrees.

Further, the plurality of air inlets comprise at least one first sub air inlet and at least one second sub air inlet, and the first sub air inlet and the second sub air inlet are respectively positioned at two sides of the mounting groove structure.

Further, the base body comprises a plate body and a coaming, the coaming is wound at the outer periphery of the plate body to form a box body shape, the mounting groove structures are arranged on the plate body, and the mounting groove structures are arranged at intervals along the length direction of the plate body.

Further, all seted up first arc breach on the both sides wall of mounting groove structure, heating element has the arc section towards one side of mounting groove structure, arc section and first arc breach smooth transition, and the electric fan heater still includes the spiral case, and the spiral case cover is established in mounting groove structure department, and the axial both ends of spiral case all have the second arc breach to make the lateral wall of mounting groove structure that is located first arc breach, arc section, the lateral wall of spiral case that is located the second arc breach enclose into two wind channel inlets that are used for with the wind channel intercommunication.

Further, the bottom surface of part base body is sunken to form first air inlet structure, and first air inlet structure's first end and the edge that is located base body's length direction, and first air inlet structure's second end is connected with the mounting groove structure, in base body's thickness direction, and first air inlet structure's second end is higher than first air inlet structure's first end, and has seted up first sub-air intake on the first air inlet structure.

Further, the two side walls of the mounting groove structure are provided with first arc-shaped notches, and the height of the second end of the first air inlet structure is lower than the lowest point of the first arc-shaped notches.

Further, the gradient from the first end to the second end of the first air inlet structure is B, wherein B is more than or equal to 10 degrees and less than or equal to 14 degrees.

By adopting the technical scheme, the fan heater is arranged to be in a structure form comprising a plurality of centrifugal wind wheels, so that the single centrifugal wind wheel is small in size and is not easy to deform greatly when the rotating speed of the single centrifugal wind wheel is large, the rotating reliability of the centrifugal wind wheel is ensured, and in addition, the centrifugal wind wheel can be put into use after being directly injection-molded, the manufacturing cost is low, and the processing and manufacturing cost of the fan heater is reduced.

Furthermore, the application greatly increases the air inlet quantity of the warm air blower by communicating the same air inlet channel with at least two air inlets.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

Fig. 1 shows a schematic structure of a warm-air drier according to an alternative embodiment of the present invention;

Fig. 2 shows a partial schematic structure of the warm-air drier of fig. 1, in which a housing is omitted;

fig. 3 shows a schematic view of the fan heater of fig. 2 with the volute omitted;

FIG. 4 shows a schematic view of the fan heater of FIG. 3 with the centrifugal rotor omitted;

FIG. 5 shows a schematic view of the fan heater of FIG. 4 with the heating assembly omitted;

Fig. 6 shows a schematic view of the heater unit of fig. 5 from another view, with the heating assembly omitted;

FIG. 7 shows a schematic cross-sectional view of the fan heater of FIG. 6 with the heating assembly omitted;

fig. 8 shows a schematic view of a part of the sectional structure of the fan heater in fig. 2.

Wherein the above figures include the following reference numerals:

10. a housing; 11. a base; 111. an air inlet; 1111. a first sub-air inlet; 1112. a second sub-air inlet; 112. a mounting groove structure; 1121. a first arcuate notch; 113. a plate body; 1131. a first air intake structure; 1132. a second air inlet structure; 114. coaming plate; 12. a housing; 121. an air outlet; 13. an air duct inlet;

20. Centrifugal wind wheel;

30. a heating assembly; 31. an arcuate plate segment;

40. A volute; 41. a second arcuate notch;

50. a driving part.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention provides a warm air blower, which aims to solve the problems that in the prior art, the size of the whole machine is large due to the fact that the length of a cross-flow wind wheel is long, and the cross-flow wind wheel is easy to deform when the rotating speed is large.

As shown in fig. 1 to 8, the fan heater includes a housing 10, a plurality of centrifugal wind wheels 20 and a heating assembly 30, wherein the housing 10 has an exhaust air duct and at least one intake air duct, the housing 10 further has an exhaust air duct 121 and at least two intake air inlets 111, wherein the exhaust air duct is communicated with the exhaust air duct 121, and the same intake air duct is communicated with the at least two intake air inlets 111; at least one centrifugal wind wheel 20 is arranged in the air inlet duct; the heating assembly 30 is disposed at a position where the air inlet duct communicates with the air outlet duct to heat the air blown out by the centrifugal wind wheel 20 and is discharged through the air outlet 121.

Through setting up the electric fan heater into the structural style that includes a plurality of centrifugal wind wheel 20, like this, because the size of single centrifugal wind wheel 20 is less, be difficult for appearing great deformation when its rotational speed is great to ensure centrifugal wind wheel 20's rotation reliability, in addition, centrifugal wind wheel 20 can put into use after direct injection molding, low in manufacturing cost is favorable to reducing electric fan heater's processing manufacturing cost. Further, the application greatly increases the air intake of the fan heater by communicating the same air intake duct with at least two air inlets 111.

In the present application, the plurality of centrifugal wind wheels 20 are all coaxially arranged, and the fan heater further includes at least one driving portion 50, and two adjacent centrifugal wind wheels 20 are driven by the same driving portion 50. In this way, the compactness of a plurality of centrifugal wind wheels 20 is ensured, thereby being beneficial to the miniaturization design of the fan heater, and in addition, the same driving part 50 is fully used for driving two adjacent centrifugal wind wheels 20, thereby being beneficial to the miniaturization design of the fan heater.

It should be noted that, in the present application, when two centrifugal wind wheels 20 are disposed in the same air intake duct, the two centrifugal wind wheels 20 are coaxially disposed, and the centrifugal wind wheel 20 near one side of the driving portion 50 drives rotation through the driving portion 50, and drives rotation of the other centrifugal wind wheel 20 through a transmission shaft between the two centrifugal wind wheels 20. In an embodiment of the present application, which is not shown, different centrifugal wind wheels 20 are operated by the corresponding driving units 50. In this way, the driving reliability of the single driving portion 50 to the corresponding centrifugal wind wheel 20 is ensured, and the independent control of each centrifugal wind wheel 20 can be realized.

In the present application, a plurality of centrifugal wind wheels 20 are arranged in sequence along the longitudinal direction of the housing 10. Thus, the whole regularity of the warm air blower is ensured.

Preferably, as shown in fig. 2 and 3, the centrifugal wind wheels 20 in the present application are two, and the two centrifugal wind wheels 20 are driven by the same driving part 50, and the driving part 50 is located between the two centrifugal wind wheels 20, and two driving shafts of the driving part 50 are respectively connected with the centrifugal wind wheels 20 on the corresponding sides in a driving way.

In the present application, the air inlet 111 and the air outlet 121 are provided on different side walls of the housing 10. Like this, while guaranteeing the structural strength of each lateral wall of casing 10, can also air intake 111 can be direct with the wind channel intercommunication of intaking, and the air inlet route is shorter to and ensure that the wind channel of airing exhaust can also be direct with air exit 121 direct intercommunication, ensure that the air-out route is shorter, be favorable to promoting the efficiency that the electric fan heater provided the warm braw.

As shown in fig. 1 to 7, the casing 10 includes a base 11 and a casing 12, wherein at least two air inlets 111 are formed in the base 11, each air inlet 111 is disposed at intervals along the length direction of the base 11, a centrifugal wind wheel 20 is disposed between two adjacent air inlets 111 that are communicated with the same air inlet duct, and the heating assembly 30 is disposed at a position opposite to the centrifugal wind wheel 20; the housing 12 is disposed on the base 11, and an air outlet 121 is formed at a position of the housing 12 opposite to the heating element 30. In this way, by providing the housing 10 in a structure including the base 11 and the cover 12, convenience in assembling the fan heater is ensured.

As shown in fig. 2 to 7, the base 11 includes a base body and a mounting groove structure 112, the mounting groove structure 112 is disposed on the base body, and a groove wall of the mounting groove structure 112 is in a slide shape, an outlet of the mounting groove structure 112 in the slide shape faces the heating assembly 30 to communicate an air inlet duct and an air outlet duct, and at least a portion of the centrifugal wind wheel 20 is disposed in the mounting groove structure 112. In this way, the space of the mounting groove structure 112 is fully utilized to mount the centrifugal wind wheel 20, and the overall compactness of the fan heater is ensured.

Of course, the mounting groove structure 112 and the base body may be integrally formed.

As shown in fig. 2 to 7, at least a part of the inner wall of the base body bulges towards one side in the housing 12 to form a second air inlet structure 1132, two sides of the second air inlet structure 1132 are respectively provided with a mounting groove structure 112, the second air inlet structure 1132 is provided with an air inlet 111, and the air inlet 111 is respectively communicated with the mounting groove structures 112 at two sides. The plurality of air inlets 111 includes at least one first sub-air inlet 1111 and at least one second sub-air inlet 1112, the cross section of the second air inlet structure 1132 is in a trapezoid shape, and the second sub-air inlets 1112 are provided on two inclined oblique sides of the trapezoid-shaped second air inlet structure 1132. In this way, compared with the existing mode of directly forming the second sub air inlet 1112 on the plane of the base body, the air intake of the second sub air inlet 1112 is enlarged, meanwhile, the air intake resistance of the second sub air inlet 1112 can be reduced, and the effect of effective drainage is achieved.

It should be noted that, in the present application, considering that the slope design of the two inclined oblique sides of the second air intake structure 1132 affects the air intake of the air duct inlet 13, as shown in fig. 7, in the thickness direction of the plate 113 of the base body, the height of the second air intake structure 1132 is higher than the height of the geometric center line of the air duct inlet 13. In this way, it is ensured that the air intake of the tunnel inlet 13 is sufficient, and the dashed line marked with the letter C in fig. 7 represents the geometric center line of the tunnel inlet 13.

As shown in FIG. 7, the slope from the first end to the second end of the inclined side of the second air intake structure 1132 in a trapezoid shape is A, wherein A is 70 DEG.ltoreq.A.ltoreq.85 deg. Like this, through the value scope of slope A of the first end to the second end of the slope limit of second air inlet structure 1132 that is trapezoidal form is rationally optimized, ensure slope A in this scope can ensure that the air inlet area effectively increases.

Preferably, the slope a of the inclined side of the second air intake structure 1132 having a trapezoid shape from the first end to the second end is 81 °. Thus, an effective increase of 57% in the intake area is ensured.

As shown in fig. 2 to 7, the plurality of air inlets 111 includes at least one first sub-air inlet 1111 and at least one second sub-air inlet 1112, the second sub-air inlet 1112 is formed in the second air inlet structure 1132, and the first sub-air inlet 1111 and the second sub-air inlet 1112 are respectively located at two sides of the mounting groove structure 112. Thus, since the centrifugal wind wheel 20 is disposed in the mounting groove structure 112, the first sub-air inlet 1111 and the second sub-air inlet 1112 for communicating with the same air inlet duct are respectively disposed on two sides of the mounting groove structure 112, which is beneficial to improving the air inlet efficiency and the air inlet quantity of the fan heater.

As shown in fig. 5, the base body includes a plate body 113 and a surrounding plate 114, the surrounding plate 114 is wound around an outer periphery of the plate body 113 to form a box shape, the mounting groove structures 112 are disposed on the plate body 113, and the plurality of mounting groove structures 112 are disposed at intervals along a length direction of the plate body 113. Thus, the box-shaped base body is convenient to directly cover the cover shell 12 at the coaming 114, so that the assembly of the cover shell 12 and the base 11 can be realized, and in addition, the plurality of mounting groove structures 112 are arranged at intervals along the length direction of the plate body 113, so that the space in the length direction of the plate body 113 is fully utilized, and the compactness of the whole structure of the fan heater is ensured.

As shown in fig. 2, the two side walls of the mounting groove structure 112 are provided with first arc-shaped notches 1121, one side of the heating component 30 facing the mounting groove structure 112 is provided with an arc-shaped plate segment 31, the arc-shaped plate segment 31 and the first arc-shaped notch 1121 are in smooth transition, the fan heater further comprises a volute 40, the volute 40 is covered at the mounting groove structure 112, and the two axial ends of the volute 40 are provided with second arc-shaped notches 41, so that the side wall of the mounting groove structure 112, the arc-shaped plate segment 31 and the side wall of the volute 40, which is positioned at the first arc-shaped notch 1121, enclose two air duct inlets 13 which are used for communicating with an air inlet duct. Both duct inlets 13 are circular. Thus, the circular duct inlet 13 is advantageous in reducing wind resistance.

As shown in fig. 2 to 7, the bottom outer surface of a part of the base body is recessed to form a first air inlet structure 1131, a first end of the first air inlet structure 1131 is located at the edge of the base body in the length direction, a second end of the first air inlet structure 1131 is connected with the mounting groove structure 112, in the thickness direction of the base body, the second end of the first air inlet structure 1131 is higher than the first end of the first air inlet structure 1131, and a first sub air inlet 1111 is formed in the first air inlet structure 1131. Like this, under the prerequisite that does not increase the volume of base body, first air inlet structure 1131 is the structural style of slope form and compares in current direct seting up first sub-air intake 1111 on the plane of base body, has increased the open area of first sub-air intake 1111, ensures that the intake of first sub-air intake 1111 is enough, in addition, is favorable to shortening the route that wind got into the air inlet wind channel from first sub-air intake 1111 to reduce the windage, and then be favorable to promoting the air quantity performance of electric fan heater.

Further, in order to avoid that the second end of the first air intake structure 1131 blocks the first arc-shaped notch 1121 and the air intake smoothness of the air duct inlet 13 cannot be ensured, as shown in fig. 4 to 7, the two side walls of the mounting groove structure 112 are all provided with the first arc-shaped notch 1121, and the height of the second end of the first air intake structure 1131 is lower than the lowest point of the first arc-shaped notch 1121.

As shown in FIG. 7, the first end to the second end of the first air intake 1131 has a slope B, wherein B is 10-14. Like this, through the slope B of reasonable optimization first air inlet structure 1131's first end to second end for under the prerequisite that does not increase the whole volume of base body, greatly increased the open area of first sub-air intake 1111.

Preferably, the slope B of the first end to the second end of the first air intake 1131 is 12 °. In this way, it is ensured that the intake area can be increased by 9%.

In the present application, the cross section of the hole of the first sub-air inlet 1111 formed in the first air inlet structure 1131 may be at least one of square, circular or polygonal, and of course, the cross section of the hole of the second sub-air inlet 1112 formed in the second air inlet structure 1132 may also be at least one of square, circular or polygonal.

It should be noted that, in the present application, the driving portion 50 is a shaded pole motor, and the shaded pole motor is mounted on the horizontal platform of the second air intake structure 1132 for connecting the two inclined side walls, so that the shaded pole motor with lower cost can be used for the motor performance requirement required by the centrifugal wind wheel 20, which is beneficial to improving the economy of the fan heater.

In the present application, the heating assembly 30 is a PTC assembly, which includes a PTC bracket and a PTC, wherein the PTC is mounted on the PTC bracket, and the PTC is used to heat the wind blown from the centrifugal wind wheel 20.

Furthermore, the double centrifugal wind wheel provided by the application can improve the air quantity of the fan heater and simultaneously reduce noise.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fan heater, comprising:

The shell (10) is provided with an air exhaust duct and at least one air inlet duct, the shell (10) is also provided with an air outlet (121) and a plurality of air inlets (111), wherein the air exhaust duct is communicated with the air outlet (121), and the same air inlet duct is communicated with at least two air inlets (111);

The centrifugal wind wheel (20) is arranged in the air inlet duct;

The heating assembly (30) is arranged at the position where the air inlet duct is communicated with the air outlet duct, so as to heat the air blown out by the centrifugal wind wheel (20) and discharge the air from the air outlet (121);

The housing (10) comprises:

The centrifugal wind wheel comprises a base (11), wherein a plurality of air inlets (111) are formed in the base (11), the air inlets (111) are arranged at intervals along the length direction of the base (11), and a centrifugal wind wheel (20) is arranged between two adjacent air inlets (111) communicated with the same air inlet duct;

the base (11) comprises:

A base body;

The mounting groove structure (112) is arranged on the base body, the groove wall of the mounting groove structure (112) is in a slide shape, the outlet of the mounting groove structure (112) is in a slide shape and faces the heating assembly (30) so as to be communicated with the air inlet duct and the air outlet duct, and at least one part of the centrifugal wind wheel (20) is arranged in the mounting groove structure (112);

At least a part of the inner wall surface of the base body bulges to form a second air inlet structure (1132), the two sides of the second air inlet structure (1132) are respectively provided with the mounting groove structures (112), the second air inlet structure (1132) is provided with the air inlet (111), and the air inlet (111) is respectively communicated with the mounting groove structures (112) at the two sides;

the air inlets (111) comprise a first sub air inlet (1111) and a second sub air inlet (1112), the cross section of the second air inlet structure (1132) is trapezoid, and the second sub air inlets (1112) are formed on two inclined oblique sides of the second air inlet structure (1132) which is trapezoid;

The fan heater further comprises a driving part (50), when the number of the driving parts (50) is one, two adjacent centrifugal wind wheels (20) are driven by the same driving part (50); or when the number of the driving parts (50) is plural, the different centrifugal wind wheels (20) are operated by the corresponding driving parts (50).

2. A fan heater according to claim 1, wherein the height of the second air inlet structure (1132) is higher than the height of the geometrical centre line of the air duct inlet (13) in the thickness direction of the base body.

3. A fan heater according to claim 1, wherein the slope from the first end to the second end of the inclined edge of the second air inlet structure (1132) in the shape of a trapezoid is a, wherein a is 70 ° -85 °.

4. The warm-air drier according to claim 1, characterized in that the first sub-air inlet (1111) and the second sub-air inlet (1112) are located on both sides of the mounting groove structure (112), respectively.

5. The warm-air drier according to claim 1, wherein the base body comprises:

a plate body (113);

The coaming (114), coaming (114) are around establishing the periphery department of plate body (113) to form box body form, mounting groove structure (112) set up on plate body (113), and a plurality of mounting groove structure (112) are followed the length direction interval setting of plate body (113).

6. An air heater according to claim 1, wherein,

The fan heater comprises a mounting groove structure (112), and is characterized in that first arc-shaped notches (1121) are formed in two side walls of the mounting groove structure (112), one side of the mounting groove structure (112) is provided with an arc-shaped plate section (31) in a direction towards the heating assembly (30), the arc-shaped plate section (31) and the first arc-shaped notches (1121) are in smooth transition, the fan heater further comprises a volute (40), the volute (40) is covered at the mounting groove structure (112), and second arc-shaped notches (41) are formed in two axial ends of the volute (40), so that the side walls of the mounting groove structure (112) of the first arc-shaped notches (1121) are located, and the side walls of the volute (40) of the second arc-shaped notches (41) are surrounded to form two air duct inlets (13) communicated with an air inlet duct.

7. Warm-air drier as claimed in any one of claims 1 to 6, wherein,

Part the bottom surface of base body is sunken to form first air inlet structure (1131), just the first end of first air inlet structure (1131) is located base body's length direction's edge, the second end of first air inlet structure (1131) with mounting groove structure (112) are connected in base body's thickness direction, the second end of first air inlet structure (1131) is higher than the first end of first air inlet structure (1131), just first sub-air intake (1111) have been seted up on first air inlet structure (1131).

8. The warm-air drier according to claim 7, wherein the two side walls of the mounting groove structure (112) are provided with first arc-shaped notches (1121), and the height of the second end of the first air inlet structure (1131) is lower than the lowest point of the first arc-shaped notches (1121).

9. The fan heater of claim 7, wherein a slope from the first end to the second end of the first air intake structure (1131) is B, wherein B is 10 ° or less and 14 ° or less.