Air conditioner

Abstract

The utility model discloses an air conditioner which comprises a shell, a heat exchange assembly and a driving assembly, and an air inlet is formed in the shell. The heat exchange assembly is arranged in the shell and comprises a heat exchanger and an auxiliary heater, the auxiliary heater is provided with a first windward surface and a second windward surface, the area of the first windward surface is larger than that of the second windward surface, the auxiliary heater is provided with a rotating axis, and the first windward surface and the second windward surface are sequentially arranged in the direction around the rotating axis; the driving assembly is connected with the auxiliary heater to drive the auxiliary heater to rotate so as to change the windward area of the auxiliary heater. According to the air conditioner provided by the embodiment of the utility model, the windward area of the auxiliary heater is adjusted to adapt to self requirements, so that the performance of the air conditioner is favorably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an air conditioner. Background Art

[0002] In the related art, the auxiliary heat exchanger of the air conditioner is generally fixed to other parts of the air conditioner by screws and cannot move. Secondly, the auxiliary heat exchanger has different effects on the airflow sucked into the air inlet at different installation positions or installation angles, which may affect the performance of the air conditioner. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an air conditioner, which can adjust the windward area of ​​the auxiliary heater to meet its own needs, which is conducive to improving the performance of the air conditioner.

[0004] An air conditioner according to an embodiment of the first aspect of the utility model includes: a shell, the shell is formed with an air inlet; a heat exchange component, the heat exchange component is arranged in the shell and includes a heat exchanger and an auxiliary heater, the auxiliary heater has a first windward surface and a second windward surface, the area of ​​the first windward surface is larger than the area of ​​the second windward surface, the auxiliary heater has a rotation axis, the first windward surface and the second windward surface are arranged in sequence along the direction around the rotation axis; a drive component, the drive component is connected to the auxiliary heater for driving the auxiliary heater to rotate to change the windward area of ​​the auxiliary heater.

[0005] According to the air conditioner of the embodiment of the utility model, the auxiliary heater is provided with a first windward surface and a second windward surface, and the area of ​​the first windward surface is larger than that of the second windward surface. The driving component drives the auxiliary heater to rotate to change the windward area of ​​the auxiliary heater so as to adapt to the needs of the air conditioner. When the front surface of the auxiliary heater is the first windward surface, the windward area of ​​the auxiliary heater is larger, so that the auxiliary heater has a larger contact area, which can enable the auxiliary heater to heat more air, which is beneficial to improving the heating effect between the auxiliary heater and the airflow. When the auxiliary heater is switched to the second windward surface, the windward area of ​​the auxiliary heater is smaller, that is, the auxiliary heater has a smaller resistance to the airflow, which can reduce the energy loss of the airflow passing through the auxiliary heater, which is beneficial to reducing the air volume loss of the air conditioner, so that the air conditioner has a larger air volume, thereby adjusting the windward area of ​​the auxiliary heater to adapt to the needs of the air conditioner, which is beneficial to improving the performance of the air conditioner.

[0006] In some embodiments, a first mounting plate is provided in the shell, and one axial end of the auxiliary heater is rotatably engaged with the first mounting plate through a first mounting seat, the axial direction of the auxiliary heater is the extension direction of the rotation axis, and the first mounting seat and the first mounting plate are engaged in the axial upper limit position of the auxiliary heater.

[0007] In some embodiments, the first mounting plate is formed with a pivot hole, and the first mounting seat is formed with a first limiting portion, a first pivot portion, and a second limiting portion which are arranged in sequence along the axial direction. The first pivot portion is pivotally engaged with the pivot hole, and the first limiting portion and the second limiting portion respectively stop at the axial end edges of the pivot hole.

[0008] In some embodiments, the first limiting portion includes a limiting flange formed on an outer peripheral wall of the first pivot portion and protruding from the first pivot portion, and the second limiting portion includes a plurality of elastic buckles arranged at intervals along the circumference of the first pivot portion.

[0009] In some embodiments, the elastic buckle includes an elastic arm extending from the first pivot portion or the limiting flange in a direction away from the auxiliary heater and a latching protrusion arranged on the outer side of the free end of the elastic arm.

[0010] In some embodiments, the pivot hole includes a first hole and a second hole arranged in sequence along the axial direction. In the cross-section of the pivot hole, the orthographic projection of the outer peripheral wall of the first hole is located on the inner side of the orthographic projection of the outer peripheral wall of the second hole. The first pivot portion cooperates with the first hole, and at least a portion of the first limiting portion is accommodated in the second hole.

[0011] In some embodiments, a second mounting plate is provided in the shell, and the other axial end of the auxiliary heater is rotatably matched with the second pivot portion of the second mounting plate, the axial direction of the auxiliary heater is the extension direction of the rotation axis, and a reinforcing rib group is convexly provided on the surface of one side of the thickness of the second mounting plate, the reinforcing rib group is arranged around the second pivot portion and includes a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, and the plurality of first reinforcing ribs and the plurality of second reinforcing ribs are cross-arranged.

[0012] In some embodiments, a second mounting plate is provided in the shell, and the lower end of the auxiliary heater is rotatably matched with the second mounting plate. The second mounting plate is formed with a receiving groove for receiving condensed water from the heat exchanger, and a supporting structure is protruded on the bottom wall of the receiving groove. The supporting structure supports the lower end of the auxiliary heater so that the lower end of the auxiliary heater is spaced apart from the bottom wall of the receiving groove.

[0013] In some embodiments, the support structure includes: a support platform, which is a cylindrical structure; and / or a reinforcement rib group, wherein the central axis of the support platform coincides with the rotation axis, and the reinforcement rib group includes a plurality of first reinforcement ribs and a plurality of second reinforcement ribs, and the plurality of first reinforcement ribs and the plurality of second reinforcement ribs are cross-arranged.

[0014] In some embodiments, the support structure includes a support platform and a reinforcing rib group, the reinforcing rib group is arranged around the support platform, and the upper end of the support platform is higher than the upper end of the reinforcing rib group, so that the lower end of the auxiliary heater is spaced apart from the reinforcing rib group.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a schematic diagram of an air conditioner according to some embodiments of the utility model;

[0018] Figure 2 yes Figure 1 An exploded view of the air conditioner shown in ;

[0019] Figure 3 is a schematic diagram of a heat exchange assembly according to some embodiments of the utility model;

[0020] Figure 4 yes Figure 1 An exploded view of the heat exchange assembly shown in ;

[0021] Figure 5 yes Figure 4 An enlarged view of section A shown in;

[0022] Figure 6 is a schematic diagram of a drive assembly according to some embodiments of the utility model;

[0023] Figure 7 is a schematic diagram of a first mounting base according to some embodiments of the utility model;

[0024] Figure 8 is a cross-sectional view of a heat exchange assembly according to some embodiments of the utility model;

[0025] Fig. 9 yes Figure 8 An enlarged view of section B shown in;

[0026] Fig.10yes Figure 8 An enlarged view of section C shown in;

[0027] Fig.11 is a cross-sectional view of an air conditioner according to some embodiments of the utility model, wherein arrows indicate air flow directions;

[0028] Fig.12 yes Fig.11 An enlarged view of the D portion shown in;

[0029] Fig.13 yes Fig.11 Another cross-sectional view of the air conditioner shown in , arrows indicate the direction of air flow, and the reinforcing rib group is not shown.

[0030] Reference numerals:

[0031] Air conditioner 100,

[0032] Shell 1, air inlet 1a, air outlet 1b, panel assembly 13, panel 131, face frame 132, air duct 132a, main section 132b, branch section 132c, rear box 14, base 15, top cover 16,

[0033] Heat exchange assembly 2, heat exchanger 21, auxiliary heater 22, first windward surface 22a, second windward surface 22b, connecting shaft 22d, rotation axis 22e, first mounting seat 23, first limiting portion 231, limiting flange 231a, first pivoting portion 232, second limiting portion 233, elastic buckle 233a, elastic arm 233b, clamping convex 233c, heat exchange bracket 24, first mounting plate 241, pivot hole 241a, first hole 241b, second hole 241c, rotation groove 241d, second mounting plate 242, receiving groove 242a, second pivoting portion 2421, supporting structure 2422, supporting platform 24221, reinforcing rib group 24222, first reinforcing rib 24222a, second reinforcing rib 24222b, seat cover 25,

[0034] Driving assembly 3, motor 31, motor housing 32, sealing plate 4, volute assembly 5, wind wheel 51, electric control box 6, wind guide assembly 7, wind shield plate 71, wind guide plate 72. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0037] Hereinafter, an air conditioner 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0038] like Figure 1-Figure 4 , Figure 8 and Fig.11 As shown, the air conditioner 100 includes a shell 1, a heat exchange component 2 and a drive component 3 (for example, including a motor 31). The shell 1 is formed with an air inlet 1a, and indoor air can enter the shell 1 through the air inlet 1a; the heat exchange component 2 is arranged in the shell 1 and includes a heat exchanger 21 and an auxiliary heater 22. The auxiliary heater 22 can heat the air flowing through it. The auxiliary heater 22 has a first windward surface 22a and a second windward surface 22b. The area of ​​the first windward surface 22a is larger than the area of ​​the second windward surface 22b. The auxiliary heater 22 has a rotation axis 22e. The first windward surface 22a and the second windward surface 22b are arranged in sequence along the direction around the rotation axis 22e; the drive component 3 is connected to the auxiliary heater 22 to drive the auxiliary heater 22 to rotate so as to change the windward area of ​​the auxiliary heater 22. In this way, when the driving component 3 drives the auxiliary heater 22 to rotate around the rotation axis 22e, the positions of the first windward surface 22a and the second windward surface 22b relative to the air inlet 1a change, so that the windward surface of the auxiliary heater 22 switches between the first windward surface 22a and the second windward surface 22b, so that the size of the windward area of ​​the auxiliary heater 22 can be adjusted to adapt to the needs of the air conditioner 100.

[0039] For example, when the windward surface of the auxiliary heater 22 is the first windward surface 22a, the windward area of ​​the auxiliary heater 22 is relatively large, and the auxiliary heater 22 has a larger contact area with the airflow passing through it, so that the auxiliary heater 22 can heat more air, which is beneficial to improving the heating effect between the auxiliary heater 22 and the airflow; when the windward surface of the auxiliary heater 22 is switched to the second windward surface 22b, the windward area of ​​the auxiliary heater 22 is relatively small, that is, the auxiliary heater 22 has a smaller resistance to the airflow, which can reduce the energy loss of the airflow passing through the auxiliary heater 22, which is beneficial to reducing wind resistance and reducing the air volume loss of the air conditioner 100, so that the air conditioner 100 has a larger air volume, so that the windward area of ​​the auxiliary heater 22 is adjusted to meet the needs of the air conditioner 100, which is beneficial to improving the performance of the air conditioner 100.

[0040] For example, combined with Figure 3 , Figure 4 and Fig.11 When the auxiliary heater 22 is needed, for example, when the air conditioner 100 is in heating mode, the driving component 3 can drive the auxiliary heater 22 to rotate so that the first windward surface 22a is perpendicular to the airflow direction flowing through the auxiliary heater 22 (for example, the first windward surface 22a is facing the airflow at the air inlet). At this time, the frontal surface of the auxiliary heater 22 is the first windward surface 22a. Since the area of ​​the first windward surface 22a is larger than the area of ​​the second windward surface 22b, the auxiliary heater 22 has a larger windward area, that is, the contact area between the auxiliary heater 22 and the airflow is larger. It can be understood that the wind-receiving area of ​​the auxiliary heater 22 is larger and the airflow flows slower. At this time, the effective contact area between the auxiliary heater 22 and the air is larger and the contact time is longer. The auxiliary heater 22 can fully heat the airflow flowing through the auxiliary heater 22, that is, the auxiliary heater 22 can have a better heating effect with the air flowing through itself, which is beneficial to improving the heating performance of the air conditioner 100.

[0041] Optionally, when the air conditioner 100 is in the heating mode and the air intake of the air conditioner 100 is large, the windward surface of the auxiliary heater 22 is the first windward surface 22a, so that the auxiliary heater 22 has a larger contact area with the air flowing through the auxiliary heater 22, which can improve the heating effect of the air conditioner 100 and help reduce the heating time of the air conditioner 100; when the air conditioner 100 is in the heating mode and the air intake of the air conditioner 100 is small, the windward surface of the auxiliary heater 22 is the second windward surface 22b, so that the auxiliary heater 22 has a smaller contact area with the air flowing through the auxiliary heater 22, which can reduce the resistance of the auxiliary heater 22 to the airflow, that is, it can reduce the loss of air volume and wind speed, which is beneficial to ensure the air volume and air outlet speed of the air conditioner 100.

[0042] For example, combining Figure 3 and Fig.13 When the auxiliary heater 22 is not needed, for example, when the air conditioner 100 is in cooling mode or a larger air volume is required, the driving component 3 can drive the auxiliary heater 22 to rotate so that the second windward surface 22b is perpendicular to the direction of the airflow passing through the auxiliary heater 22 (for example, the second windward surface 22b is facing the airflow at the air inlet). At this time, the frontal surface of the auxiliary heater 22 is the second windward surface 22b, and the area of ​​the second windward surface 22b is smaller, which can reduce the blocking effect of the auxiliary heater 22 on the airflow, that is, it can reduce the loss of air volume and wind speed, which is beneficial to improving the cooling performance of the air conditioner 100.

[0043] According to the air conditioner 100 of the embodiment of the utility model, by setting the auxiliary heater 22 to have a first windward surface 22a and a second windward surface 22b, and the area of ​​the first windward surface 22a is larger than the area of ​​the second windward surface 22b, the driving component 3 drives the auxiliary heater 22 to rotate to change the windward area of ​​the auxiliary heater 22, so as to adapt to the needs of the air conditioner 100. When the front surface of the auxiliary heater 22 is the first windward surface 22a, the windward area of ​​the auxiliary heater 22 is larger, so that the auxiliary heater 22 has a larger contact area, which can make the auxiliary heater 22 heat more air, which is beneficial to improve the heating effect between the auxiliary heater 22 and the airflow. When the auxiliary heater 22 switches to the second windward surface 22b, the windward area of ​​the auxiliary heater 22 is smaller, that is, the auxiliary heater 22 has a smaller resistance to the airflow, which can reduce the energy loss of the airflow passing through the auxiliary heater 22, which is beneficial to reducing the air volume loss of the air conditioner 100, so that the air conditioner 100 has a larger air volume, thereby adjusting the windward area of ​​the auxiliary heater 22 to adapt to the needs of the air conditioner 100, which is beneficial to improve the performance of the air conditioner 100.

[0044] For example, the auxiliary heater 22 may be a PTC (e.g., a ceramic PCT), or an electric heater (e.g., a tubular electric heater), etc. It is understood that there are one or more auxiliary heaters 22; when there are multiple auxiliary heaters 22, the rotation axes 22e of the multiple auxiliary heaters 22 are arranged to overlap (e.g., Figure 8 As shown), or the rotation axes 22e of the plurality of auxiliary heaters 22 are arranged in parallel and at intervals, but it is not limited thereto.

[0045] Optionally, the cross-sectional shape of the auxiliary heater 22 is not limited, and the cross-sectional shape of the auxiliary heater 22 is perpendicular to the rotation axis 22e of the auxiliary heater 22. For example, the cross-sectional shape of the auxiliary heater 22 is elliptical or polygonal. Taking the cross-sectional shape of the auxiliary heater 22 as a rectangle as an example, the surface corresponding to the long side of the rectangle corresponding to the cross-sectional shape of the auxiliary heater 22 is the first windward surface 22a, and the surface corresponding to the short side of the rectangle corresponding to the cross-sectional shape of the auxiliary heater 22 is the second windward surface 22b. Then, the auxiliary heater 22 includes two first windward surfaces 22a and two second windward surfaces 22b, and the two first windward surfaces 22a and the two second windward surfaces 22b are sequentially arranged along the direction around the rotation axis 22e, and each first windward surface 22a and each second windward surface 22b extend along the extension direction of the rotation axis 22e of the auxiliary heater 22.

[0046] Optionally, the type of the air conditioner 100 is not limited, and it can be an integrated air conditioner or a split air conditioner. The integrated air conditioner can include a mobile air conditioner, etc., and the split air conditioner can include a floor-standing air conditioner, an air conditioner cabinet, or a wall-mounted air conditioner, etc.

[0047] In some embodiments, in combination Figure 3-Figure 4 and Fig. 9 A first mounting plate 241 is provided in the shell 1, and one axial end of the auxiliary heater 22 (for example, the upper end of the auxiliary heater 22) is rotatably matched with the first mounting plate 241 through the first mounting seat 23. The axial direction of the auxiliary heater 22 is the extension direction of the rotation axis 22e. Therefore, the auxiliary heater 22 is matched with the first mounting seat 23, so that the auxiliary heater 22 can rotate with the first mounting seat 23 relative to the first mounting plate 241 to change the windward area of ​​the auxiliary heater 22. Secondly, the auxiliary heater 22 is rotatably matched with the first mounting plate 241 through the first mounting seat 23, which can avoid interference between the auxiliary heater 22 and the first mounting plate 241 to a certain extent, which is conducive to simplifying the structure of the first mounting plate 241 and the auxiliary heater 22. At the same time, when the first mounting seat 23 and the first mounting plate 241 are detachably matched, the auxiliary heater 22 can be disassembled and assembled by disassembling the first mounting seat 23 and the first mounting plate 241, which is convenient for operation. By way of example, in combination Fig. 9 One axial end of the auxiliary heater 22 is fixedly matched with the first mounting seat 23 (for example, one axial end of the auxiliary heater 22 is plugged into the first mounting seat 23), and the driving component 3 can drive the first mounting seat 23 to rotate relative to the first mounting plate 241 to drive the auxiliary heater 22 to rotate around the rotation axis 22e; of course, the driving component 3 can also directly drive the auxiliary heater 22 to rotate.

[0048] Among them, the first mounting seat 23 and the first mounting plate 241 are matched in the axial upper limit position of the auxiliary heater 22, so that the first mounting plate 241 can limit the axial movement of the first mounting seat 23 in the auxiliary heater 22, so as to ensure that the first mounting seat 23 and the first mounting plate 241 are accurately matched in the axial direction of the auxiliary heater 22, which is beneficial to improving the assembly stability of the auxiliary heater 22 in its axial direction.

[0049] Exemplarily, the first mounting plate 241 is disposed at one end of the heat exchanger 21 in the axial direction of the auxiliary heater 22 and is fixedly connected to the heat exchanger 21. The heat exchanger 21 can be reliably installed through the first mounting plate 241, and the auxiliary heater 22 can be directly rotatably matched with the first mounting plate 241, or rotatably matched with the first mounting plate 241 through the first mounting seat 23, thereby simplifying the structure of the air conditioner 100.

[0050] In some embodiments, in combination Figure 4 and Fig. 9 The first mounting plate 241 is formed with a pivot hole 241a, and the first mounting seat 23 is formed with a first limiting portion 231, a first pivot portion 232 and a second limiting portion 233 which are sequentially arranged along the axial direction. Then, in the axial direction of the auxiliary heater 22, the first limiting portion 231 and the second limiting portion 233 are respectively located on opposite sides of the first pivot portion 232; the first pivot portion 232 is pivotally engaged with the pivot hole 241a, and the first limiting portion 231 and the second limiting portion 233 are respectively stopped at the axial end edges of the pivot hole 241a. Thus, the first pivot portion 232 is pivotally matched with the pivot hole 241a, so that the first mounting seat 23 and the first mounting plate 241 can be rotatably matched, so that the auxiliary heater 22 can rotate relative to the first mounting plate 241, and the first limiting portion 231 and the second limiting portion 233 respectively stop at the axial end edges of the pivot hole 241a to limit the axial movement of the first mounting seat 23 relative to the first mounting plate 241 in the auxiliary heater 22, so as to ensure that the first mounting seat 23 is reliably limited to the first mounting plate 241 in the axial direction of the auxiliary heater 22, and there is no need to free up a large operating space and installation space for the cooperation between the first mounting seat 23 and the first mounting plate 241, so as to facilitate the compact setting of the first mounting seat 23 and the first mounting plate 241.

[0051] For example, in Fig. 9In the example, the heat exchange component 2 includes a heat exchange bracket 24, the heat exchanger 22 is mounted on the heat exchange bracket 24, the heat exchange bracket 24 includes a first mounting plate 241, the first mounting plate 241 is located on one side of the heat exchanger 21 in the axial direction of the auxiliary heater 22, the first mounting plate 241 is formed with a pivot hole 241a, the first mounting seat 23 is pivotally matched with the inner peripheral wall of the pivot hole 241a, the auxiliary heater 22 is arranged in the shell 1, and the axial end of the auxiliary heater 22 has a connecting shaft 22d, the connecting shaft 22d is passed through and fixed in the fixing hole formed by the first mounting seat 23, so that the axial end of the auxiliary heater 22 is connected to the first mounting seat 23. The drive assembly 3 is arranged on the side of the first mounting seat 23 away from the auxiliary heater 22, and the drive assembly 3 includes a motor 31 and a motor housing 32. The motor housing 32 is arranged on the first mounting plate 241 (for example, the motor housing 32 is fixed to the side of the first mounting plate 241 away from the center of the auxiliary heater 22 by screws), and the motor outer body 32 is formed with a receiving groove, the motor 31 is arranged in the receiving groove and is dynamically connected to the first mounting seat 23, so that when the motor 31 is working, the motor 31 drives the first mounting seat 23 to rotate relative to the pivot hole 241a to drive the auxiliary heater 22 to rotate around the rotation axis 22e.

[0052] In some embodiments, in combination Figure 7 and Fig. 9 The first limiting portion 231 includes a limiting flange 231a formed on the outer peripheral wall of the first pivoting portion 232 and protruding from the first pivoting portion 232, and the second limiting portion 233 includes a plurality of elastic buckles 233a arranged at intervals along the circumference of the first pivoting portion 232. Thus, the limiting flange 231a can be stopped and matched with the edge of one axial end of the pivot hole 241a, and the plurality of elastic buckles 233a are arranged at intervals in the circumference of the pivot hole 241a and respectively stop and match with the edge of the other axial end of the pivot hole 241a, thereby realizing the axial upper limit position matching of the first mounting seat 23 and the first mounting plate 241 in the pivot hole 241a, so as to improve the accuracy and reliability of the axial matching position of the first mounting seat 23 and the first mounting plate 241.

[0053] For example, in Figure 7 and Fig. 9 In the example, the first mounting plate 241 forms a pivot hole 241a, and the first mounting seat 23 forms a first limiting portion 231, a first pivot portion 232 and a second limiting portion 233 which are arranged in sequence along the axial direction of the pivot hole 241a, the first limiting portion 231 and the second limiting portion 233 are located on both axial sides of the first pivot portion 232, the first pivot portion 232 is pivotally matched with the pivot hole 241a, the first limiting portion 231 and the second limiting portion 233 are respectively stopped at the axial end edges of the pivot hole 241a, and the limiting flange 231a and the elastic buckle 233a are respectively stopped at the axial end edges of the pivot hole 241a in the axial direction of the pivot hole 241a.

[0054] In some embodiments, in combination Figure 7 and Fig. 9 The elastic buckle 233a includes an elastic arm 233b and a locking protrusion 233c. The elastic arm 233b extends from the first pivot portion 232 or the limiting flange 231a in a direction away from the auxiliary heat exchanger 22, and the locking protrusion 233c is arranged on the outer side of the free end of the elastic arm 233b. Therefore, the elastic arm 233b is cantilevered at one end of the first pivot portion 232, so that the elastic arm 233b has a certain elastic deformation ability, so that when the elastic arm 233b is elastically deformed, the position of the protrusion 233c arranged at the free end of the elastic arm 233b can be adapted to change, so as to realize the limiting cooperation between the elastic buckle 233a and the first mounting plate 241, or unlock the limiting cooperation between the elastic buckle 233a and the first mounting seat 241 so as to realize the separation of the first mounting seat 23 and the first mounting plate 241; and the elastic arm 233b can increase the distance between the protrusion 233c and the limiting flange 231a to a certain extent, so that the protrusion 233c and the limiting flange 231a are spaced apart in the axial direction of the pivot hole 241a, so that the limiting flange 231a and the protrusion 233c are respectively stopped and cooperated with the axial end edges of the pivot hole 241a.

[0055] Of course, the length of the elastic arm 233b can be adjusted to adapt to the axial length of the pivot hole 241a so that the elastic buckle 233a can be matched with the pivot hole 241a.

[0056] For example, combined with Figure 7 and Fig. 9 , taking the axial direction of the pivot hole 241a as the up and down direction as an example, the first mounting plate 241 is formed with a pivot hole 241a, the second limiting portion 233 and the first limiting portion 231 are respectively located on the upper and lower sides of the first pivot portion 232, the first limiting portion 231 includes a limiting flange 231a, the second limiting portion 233 includes an elastic buckle 233a, the elastic buckle 233a includes an elastic arm 233b and a clamping protrusion 233c, the elastic arm 233b extends from the edge of one side of the first pivot portion 232 away from the limiting flange 231a to the direction away from the auxiliary heat exchanger 22, the clamping protrusion 233c is located at the upper end of the elastic arm 233b, and the clamping protrusion 233c is located on the side of the elastic arm 233b away from the rotation axis 22e.

[0057] Optionally, a notch 232a is formed on one side of the first pivoting portion 232 away from the limiting flange 231a, and the elastic buckle 233a is connected to the bottom wall of the notch 232a adjacent to the limiting flange 231a, and the two side walls of the notch 232a in the circumferential direction of the first pivoting portion 232 are spaced from the elastic buckle 233a, so as to improve the elastic deformation ability of the elastic buckle 233a to a certain extent. Of course, the elastic buckle 233a can also be directly provided on the limiting flange 231a.

[0058] The assembly process of the first mounting seat 23 and the first mounting plate 241 is as follows: first, the first mounting seat 23 is gradually pushed upward from the lower side of the first mounting plate 241 into the pivot hole 241a, and the elastic buckle 233a is elastically deformed, so that the elastic buckle 233a is penetrated into the pivot hole 241a, until the protrusion 233c extends out of the upper end of the pivot hole 241a, and the elastic buckle 233a tends to restore its original shape so that the protrusion 233c stops at the upper end edge of the pivot hole 241a. The flange 231a stops at the lower edge of the pivot hole 241a, thereby completing the assembly of the first mounting seat 23 and the first mounting plate 241; the disassembly process of the first mounting seat 23 and the first mounting plate 241: first push the protrusion 233c to separate the protrusion 233c from the upper edge of the pivot hole 241a, and then push the first mounting seat 23 to move downward until the first mounting seat 23 is separated from the pivot hole 241a, thereby completing the disassembly of the first mounting seat 23 and the first mounting plate 241.

[0059] In some embodiments, in combination Fig. 9 The pivot hole 241a includes a first hole 241b and a second hole 241c arranged in sequence along the axial direction. On the cross section of the pivot hole 241a, the orthographic projection of the outer peripheral wall of the first hole 241b is located on the inner side of the orthographic projection of the outer peripheral wall of the second hole 241c. The first pivot portion 232 cooperates with the first hole 241b, and at least a portion of the first limiting portion 231 is accommodated in the second hole 241c, so that the above-mentioned at least portion of the first limiting portion 231 is suitable for abutting against the step structure formed by the second hole 241c and the first hole 241b, so that the first limiting portion 231 cooperates with the pivot hole 241a in the axial upper limit position of the pivot hole 241a, avoiding the first mounting seat 23 and the first mounting plate 241 from disengaging in the axial direction of the auxiliary heater 22, so as to ensure the reliable pivotal cooperation between the first mounting seat 23 and the first mounting plate 241, and at the same time, it is beneficial to save the occupied space after the first mounting seat 23 and the first mounting plate 241 are cooperated.

[0060] For example, in Fig. 9In the example, the first mounting plate 241 is formed with a pivot hole 241a, and the pivot hole 241a includes a first hole 241b and a second hole 241c which are sequentially arranged along the axial direction and are both formed as circular holes. The first hole 241b is located on the side of the second hole 241c away from the auxiliary heater 22, and the aperture of the first hole 241b is smaller than the aperture of the second hole 241c. The first limiting portion 231 and the second limiting portion 233 are located on both sides of the axial direction of the first pivot portion 232, and the first pivot portion 232 is pivotally matched with the inner peripheral wall of the first hole 241b. The first limiting portion 231 includes a limiting flange 231a, which protrudes from the outer peripheral wall of the first pivot portion 232, and the limiting flange 231a is accommodated in the second hole 241c, so that the pivot hole 241a can, to a certain extent, play an axial and radial limiting role on the limiting flange 231a, and the second limiting portion 233 includes a plurality of elastic clips 233a arranged at circumferential intervals along the first pivot portion 232, and the clamping protrusion 233c of the elastic clip 233a is snap-fitted with the edge of the first hole 241b away from the second hole 241c, so that the second limiting portion 233 is stop-fitted with the other axial end edge of the pivot hole 241a, so that the first mounting seat 23 and the first mounting plate 241 are matched in the axial upper limit of the pivot hole 241a, and the first mounting seat 23 and the first mounting plate 241 are rotationally matched.

[0061] In some embodiments, in combination Figure 3 and Fig.10 A second mounting plate 242 is provided in the housing 1, and the other axial end of the auxiliary heater 22 (e.g., the lower end of the auxiliary heater 22) is rotatably matched with the second pivoting portion 2421 of the second mounting plate 242. The axial direction of the auxiliary heater 22 is the extension direction of the rotation axis 22e. A reinforcing rib group 24222 is convexly provided on the surface of one side of the thickness of the second mounting plate 242. The reinforcing rib group 24222 is arranged around the second pivoting portion 2421 and the reinforcing rib group 24222 includes a plurality of first reinforcing ribs 24222a and a plurality of second reinforcing ribs 24222b. The plurality of first reinforcing ribs 24222a and the plurality of second reinforcing ribs 24222b are cross-arranged. Thus, the plurality of first reinforcing ribs 24222a and the plurality of second reinforcing ribs 24222b are formed on the second mounting plate 242, so that the structural strength of the second mounting plate 242 can be improved, which is beneficial to improving the stability of the second mounting plate 242 when pivotally matched with the auxiliary heater 22, and ensuring the stability of the auxiliary heater 22 when rotating.

[0062] Among them, multiple first reinforcing ribs 24222a are arranged at intervals along the first direction, each first reinforcing rib 24222a extends along the second direction, multiple second reinforcing ribs 24222b are arranged at intervals along the second direction, each second reinforcing rib 24222b extends along the first direction, each first reinforcing rib 24222a is cross-connected with at least two second reinforcing ribs 24222b, and each second reinforcing rib 24222b is cross-connected with at least two first reinforcing ribs 24222a, so that the multiple first reinforcing ribs 24222a and the multiple second reinforcing ribs 24222b form a mesh-like structure; the first direction intersects with the second direction, for example, the first direction is perpendicular to the second direction.

[0063] Illustratively, in an embodiment of the present application, the second mounting plate 242 is disposed at the other end of the heat exchanger 21 in the axial direction of the auxiliary heater 22, and is fixedly connected to the heat exchanger 21. The heat exchanger 21 can be reliably installed through the second mounting plate 242, and the auxiliary heater 22 can be directly or indirectly rotatably matched with the second mounting plate 242, thereby simplifying the structure of the air conditioner 100.

[0064] In some embodiments, in combination Figure 3 and Fig.10 , a second mounting plate 242 is provided in the housing 1, the lower end of the auxiliary heater 22 is rotatably matched with the second mounting plate 242, the second mounting plate 242 is formed with a receiving groove 242a for receiving condensed water from the heat exchanger 21, a supporting structure 2422 is convexly provided on the bottom wall of the receiving groove 242a, and the supporting structure 2422 is supported on the lower end of the auxiliary heater 22, so that the lower end of the auxiliary heater 22 is spaced from the bottom wall of the receiving groove 242a, so that the auxiliary heater 22 can be spaced from the bottom wall of the receiving groove 242a by a certain distance, so as to avoid to a certain extent the condensed water in the receiving groove 242a from contacting with the auxiliary heat exchanger 21 and causing electrical safety problems, thereby facilitating the improvement of the safety of the air conditioner 100. Secondly, the supporting structure 2422 supports the lower end of the auxiliary heater 22, and the supporting structure 2422 can provide strong support for the auxiliary heater 22, which is conducive to ensuring the stability of the auxiliary heater 22 arranged in the housing 1.

[0065] Optionally, a seat cover 25 is fixedly disposed at the other axial end of the auxiliary heater 22 (e.g., the lower end of the auxiliary heater 22), and the seat cover 25 is rotationally matched with the second mounting plate 242 to achieve indirect pivotal matching between the auxiliary heater 22 and the second mounting plate 242, which is beneficial to reducing the friction between the auxiliary heater 22 and the support structure 2422, and can improve the service life of the auxiliary heater 22. Of course, the auxiliary heater 22 can also be directly pivotally matched with the second mounting plate 242.

[0066] In some embodiments, in combination Figure 5 and Fig.10The support structure 2422 includes a support platform 24221, which is a cylindrical structure, which is conducive to reducing the contact area between the support platform 24221 and the auxiliary heater 22, so as to reduce the rotation resistance of the auxiliary heater 22. At the same time, the support platform 24221 separates the auxiliary heater 22 from the bottom wall of the receiving groove 242a, so as to achieve balanced and stable support for the auxiliary heater 22 rotated to any posture; and / or, the support structure 2422 includes a reinforcing rib group 24222, The reinforcing rib group 24222 includes a plurality of first reinforcing ribs 24222a and a plurality of second reinforcing ribs 24222b, and the plurality of first reinforcing ribs 24222a and the plurality of second reinforcing ribs 24222b are cross-arranged. The reinforcing rib group 24222 can support the lower end of the auxiliary heater 22 to separate the auxiliary heater 22 from the bottom wall of the receiving groove 242a, and ensure the stability of the auxiliary heater 22 during rotation. At the same time, the reinforcing rib group 24222 can also play a certain reinforcing role on the second mounting plate 242.

[0067] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0068] In some embodiments, in combination Figure 4-Figure 5 The support structure 2422 includes a support platform 24221 and a reinforcing rib group 24222. The central axis of the support platform 24221 coincides with the rotation axis 22e. The reinforcing rib group 24222 is arranged around the support platform 24221, which can improve the stability of the support platform 24221 arranged at the second mounting plate 242. The upper end of the support platform 24221 is higher than the upper end of the reinforcing rib group 24222, so that the lower end of the auxiliary heater 22 is spaced apart from the reinforcing rib group 24222, thereby preventing the reinforcing rib group 24222 from interfering with the auxiliary heater 22 and increasing the rotation resistance of the auxiliary heater 22.

[0069] The central axis of the support platform 24221 coincides with the rotation axis 22e, so that no matter what posture the auxiliary heater 22 rotates to, it is beneficial to use a smaller-sized support platform 24221 to always stably support the lower end of the auxiliary heater 22. The central axis of the support platform 24221 coincides with the rotation axis 22e, which can be understood as including: the central axis of the support platform 24221 absolutely coincides with the rotation axis 22e, and the central axis of the support platform 24221 is parallel to the rotation axis 22e and is arranged with a small interval.

[0070] For example, in Figure 4 and Figure 5In the example, the heat exchange assembly 2 includes a heat exchange bracket 24, the heat exchanger 21 is installed on the heat exchange bracket 24, the heat exchange bracket 24 includes a first mounting plate 241 and a second mounting plate 242, the first mounting plate 241 and the second mounting plate 242 are respectively located on both sides of the heat exchanger 21 in the axial direction of the auxiliary heater 22; the second mounting plate 242 is formed with a receiving groove 242a, the receiving groove 242a is used to receive condensed water of the heat exchanger 21, and a support platform 24221 and a reinforcing rib group 24222 are provided on the bottom wall of the receiving groove 242a, the support platform 24221 is formed into a cylindrical structure, and the reinforcing rib group 24222 surrounds the support platform 24221 The reinforcing rib group 24222 is arranged in a circle, including a plurality of first reinforcing ribs 24222a and a plurality of second reinforcing ribs 24222b. The first reinforcing ribs 24222a and the second reinforcing ribs 24222b are arranged crosswise with each other. A second pivot portion 2421 is provided on the second mounting plate 242. The second pivot portion 2421 is located at the center of the support platform 24221. The second pivot portion 2421 is formed as a pivot axis and extends out of the support platform 24221 toward the auxiliary heater 22. The lower end of the auxiliary heater 22 is directly or indirectly pivotally matched with the second pivot portion 2421 so that the auxiliary heater 22 can rotate around the rotation axis 22e.

[0071] In some embodiments, in combination Figure 3-Figure 4 The air conditioner 100 further includes a sealing plate 4, which is disposed at one end of the heat exchanger 21 in the circumferential extension direction to seal the gap between the heat exchanger 21 and the shell 1, which is beneficial to avoid air leakage at the fitting point between the heat exchanger 21 and the shell 1.

[0072] In some embodiments, in combination Figure 1-Figure 2 and Figure 11-Figure 12 The shell 1 has an installation cavity and includes a panel assembly 13, a rear box body 14, a base 15 and a top cover 16. The panel assembly 13 is arranged on the front side of the rear box body 14. The panel assembly 13 includes a panel 131 and a face frame 132. The panel 131 is arranged on the front side of the face frame 132. The face frame 132 cooperates with the rear box body 14. The base 15 is arranged below the panel assembly 13 and the rear box body 14. The top cover 16 is arranged above the panel assembly 13 and the rear box body 14; the air conditioner 100 also includes a volute assembly 5 and an electric control box 6. The volute assembly 5, the heat exchange assembly 2 and the electric control box 6 are arranged in the installation cavity. The volute assembly 5 includes a wind wheel 51.

[0073] The air conditioner 100 has two air outlets 1b spaced apart from each other, the face frame 132 forms an air duct 132a, the air duct 132a includes a main section 132b and two branch sections 132c, the outlet of the main section 132b is connected to the inlet of the two branch sections 132c, and the inlet of the main section 132b is connected to the outlet of the volute assembly 5, and the outlet of each branch section 132c is connected to an air outlet 1b, and an air guide assembly 7 is provided at each air outlet 1b; the air guide assembly 7 includes an air shield 71 and an air guide plate 72, the air guide plate 72 is movably provided at the air outlet 1b of the air conditioner 100 and is used to open and close the air outlet 1b, and the air guide plate 72 has a wind dispersion area, and the air shield 71 is movably provided at the The air guide plate 72 is located at the air outlet 1b and is used to open and close the air outlet 1b. The air guide plate 72 can move relative to the wind shield 71. Thus, the air guide component 7 can have at least a first wind sensing state and a second wind sensing state. In the first wind sensing state, the air guide plate 72 opens the air outlet 1b, and the wind shield 71 opens the air outlet 1b and blocks at least part of the outside of the scattered wind area to guide the airflow blown out through at least part of the scattered wind area, so that the air guide component 7 can guide the airflow direction at the air outlet 1b. In the second wind sensing state, the air guide plate 72 closes the air outlet 1b, and the wind shield 71 opens the air outlet 1b and avoids the scattered wind area, then the airflow at the air outlet 1b flows out from the scattered wind area, so that the air conditioner 100 has a windless air supply effect.

[0074] In the airflow direction in the housing 1, the auxiliary heater 22 is located downstream of the heat exchanger 22, and the air flowing through the auxiliary heater 22 enters the wind wheel 51 and is blown out from the air outlet 1b. The air conditioner 100 also includes a sealing plate 4, one end of which is arranged at one end of the heat exchanger 21 in the circumferential extension direction, and the other end of the sealing plate 4 is arranged on the volute of the volute assembly 5, so that the sealing plate 4 can seal the gap between the heat exchanger 21 and the volute to avoid air leakage, etc.

[0075] For example, combined with Figure 8 and Fig.11 The air conditioner 100 has an air inlet 1a, which is located on the left and rear sides of the air conditioner 100. When the wind wheel 51 is working, the indoor air enters from the air inlet 1a and passes through the heat exchanger 21, the auxiliary heater 22, the wind wheel 51 and the air duct 132a in sequence, and then is sent out from the two air outlets 1b. Therefore, when the air conditioner 100 turns on the heating mode and requires a large amount of heat, the driving component 3 drives the auxiliary heater 22 to rotate around the rotation axis 22e so that the first windward surface 22a of the auxiliary heater 22 is facing the air inlet 1a. At this time, the first windward surface 22a is roughly perpendicular to the airflow passing through the auxiliary heater 22. The auxiliary heater 22 has a large contact area to heat the airflow passing through the auxiliary heater 22, which can improve the heating amount and heating performance of the air conditioner 100; Fig.13As shown, when the air conditioner 100 turns on the cooling mode or requires a larger air volume, the driving component 3 drives the auxiliary heater 22 to rotate around the rotation axis 22e so that the second windward surface 22b of the auxiliary heater 22 faces the air inlet 1a. At this time, the second windward surface 22b is roughly perpendicular to the airflow passing through the auxiliary heater 22, and the auxiliary heater 22 has a smaller windward area, which can reduce the resistance of the auxiliary heater 22 to the airflow and reduce the loss of air volume and wind speed at the air outlet 1b, which is beneficial to increase the air volume and air outlet speed of the air conditioner 100.

[0076] For example, combined with Figure 3-Figure 4 and Figure 9-10 The heat exchange component 2 includes a heat exchange bracket 24, and the heat exchanger 21 is installed on the heat exchange bracket 24. The heat exchange bracket 24 includes a first mounting plate 241 and a second mounting plate 242. The first mounting plate 241 and the second mounting plate 242 are respectively located on both sides of the heat exchanger 21 in the axial direction of the auxiliary heater 22. The first mounting plate 241 is formed with a pivot hole 241a, and the second mounting plate 242 is formed with a second pivot portion 2421. The heat exchange component 2 also includes a first mounting seat 23, which is matched with the first mounting plate 241, and the first mounting seat 23 is pivotally matched with the pivot hole 241a. The upper end of the auxiliary heater 22 is fixedly connected to the first mounting seat 23 by a fixing member (such as a bolt, etc.), and a seat cover 25 is fixed at the lower end of the auxiliary heater 22. The seat cover 25 is formed with a pivot groove 22c, and the second pivot portion 2421 is pivotally matched with the pivot groove 22c, so as to realize the rotation of the auxiliary heater 22 around the rotation axis 22e.

[0077] In the description of the present utility model, it should be understood that the terms "length", "thickness", "upper", "lower", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0078] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0080] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air conditioner, characterized in that: include: A housing, wherein the housing is formed with an air inlet; a heat exchange assembly, the heat exchange assembly being arranged in the housing and comprising a heat exchanger and an auxiliary heater, the auxiliary heater having a first windward surface and a second windward surface, the area of ​​the first windward surface being greater than the area of ​​the second windward surface, the auxiliary heater having a rotation axis, the first windward surface and the second windward surface being arranged in sequence along a direction around the rotation axis; A driving component is connected to the auxiliary heater to drive the auxiliary heater to rotate so as to change the windward area of ​​the auxiliary heater.

2. The air conditioner according to claim 1, characterized in that: A first mounting plate is provided in the housing, and one axial end of the auxiliary heater is rotatably matched with the first mounting plate through a first mounting seat, and the axial direction of the auxiliary heater is the extending direction of the rotation axis. The first mounting seat and the first mounting plate cooperate in an axial upper limit position of the auxiliary heater.

3. The air conditioner according to claim 2, characterized in that: The first mounting plate is formed with a pivot hole, and the first mounting seat is formed with a first limiting portion, a first pivot portion, and a second limiting portion which are arranged in sequence along the axial direction. The first pivot portion is pivotally engaged with the pivot hole, and the first limiting portion and the second limiting portion respectively stop at the axial end edges of the pivot hole.

4. The air conditioner according to claim 3, characterized in that: The first limiting portion includes a limiting flange formed on an outer peripheral wall of the first pivoting portion and protruding from the first pivoting portion, and the second limiting portion includes a plurality of elastic buckles arranged at intervals along the circumference of the first pivoting portion.

5. The air conditioner according to claim 4, characterized in that: The elastic buckle comprises an elastic arm extending from the first pivoting portion or the limiting flange in a direction away from the auxiliary heater and a clamping protrusion arranged on the outer side surface of the free end of the elastic arm.

6. The air conditioner according to claim 3, characterized in that: The pivot hole includes a first hole and a second hole arranged in sequence along the axial direction. In the cross section of the pivot hole, the orthographic projection of the outer peripheral wall of the first hole is located on the inner side of the orthographic projection of the outer peripheral wall of the second hole. The first pivot portion cooperates with the first hole, and at least a portion of the first limiting portion is accommodated in the second hole.

7. The air conditioner according to any one of claims 1 to 6, characterized in that: A second mounting plate is provided in the housing, and the other axial end of the auxiliary heater is rotatably matched with the second pivoting portion of the second mounting plate, and the axial direction of the auxiliary heater is the extending direction of the rotation axis. A reinforcing rib group is convexly provided on the surface of one side of the thickness of the second mounting plate. The reinforcing rib group is arranged around the second pivot portion and includes a plurality of first reinforcing ribs and a plurality of second reinforcing ribs. The plurality of first reinforcing ribs and the plurality of second reinforcing ribs are cross-arranged.

8. The air conditioner according to any one of claims 1 to 6, characterized in that: A second mounting plate is provided in the shell, and the lower end of the auxiliary heater is rotatably matched with the second mounting plate. The second mounting plate is formed with a receiving groove for receiving condensed water from the heat exchanger, and a supporting structure is protruded on the bottom wall of the receiving groove. The supporting structure supports the lower end of the auxiliary heater so that the lower end of the auxiliary heater is spaced apart from the bottom wall of the receiving groove.

9. The air conditioner according to claim 8, characterized in that: The support structure comprises: A support platform, wherein the support platform is a cylindrical structure; and / or, A reinforcing rib group, wherein the reinforcing rib group includes a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, and the plurality of first reinforcing ribs and the plurality of second reinforcing ribs are cross-arranged.

10. The air conditioner according to claim 9, characterized in that: The support structure includes a support platform and a reinforcement rib group, the central axis of the support platform coincides with the rotation axis, the reinforcement rib group is arranged around the support platform, and the upper end of the support platform is higher than the upper end of the reinforcement rib group, so that the lower end of the auxiliary heater is spaced apart from the reinforcement rib group.

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