Hot air comb

Abstract

The utility model discloses a hot air comb, relates to haircut tool technical field, the hot air comb includes comb, handle and hot air subassembly, comb includes shell and wind scooper, the peripheral side face of shell is provided with protruding comb teeth and is provided with outer air outlet hole, the shell is provided with the installation cavity that is communicated with outer air outlet hole, the wind scooper is arranged in the installation cavity, and the handle is connected with the wind scooper. The shell is provided with a mounting cavity and is provided with a heating cavity and an airflow cavity, the heating cavity and the airflow cavity are communicated and are distributed in the axial direction of the mounting cavity, the air guide cover is provided with an air guide inlet and a first air guide outlet which are communicated with the heating cavity, and the first air guide outlet is formed in the airflow cavity, is arranged relative to the middle of the shell and is communicated with the outer air outlet through the mounting cavity; the handle is provided with a handle air inlet communicated with the air guide inlet and is close to the heating cavity, the hot air assembly comprises a heating part at least partially arranged in the heating cavity and a fan arranged on the handle, and the fan is used for promoting air to flow through the heating part and flow into the airflow cavity. According to the technical scheme provided by the utility model, airflow is gathered in the middle of the shell for centralized air outlet.

Description

Technical Field

[0001] The utility model relates to the technical field of hairdressing tools, in particular to a hot air comb. Background Art

[0002] With the continuous development and innovation of personal care equipment, hot air combs, as a common care tool, are attracting more and more attention from consumers for their performance and use effects. In existing hair dryers, the airflow blown out by the blower in the hair dryer usually flows to the top of the comb head of the hot air comb. Therefore, an air guide cover is usually set inside the hot air comb to evenly blow the airflow in the hot air comb out of the comb head. For example, the patent document with patent number CN117582058A discloses a hot air comb, and a hot air component is set in the hot air comb. However, the airflow just blown in from the handle will be blown out from the comb head without being heated by the hot air component, which cannot bring a good use experience to the user. Utility Model Content

[0003] The main purpose of the utility model is to provide a hot air comb, which aims to gather airflow in the middle of a shell body for concentrated air discharge.

[0004] To achieve the above purpose, the hot air comb proposed by the utility model comprises:

[0005] A comb, comprising a shell and an air guide cover, wherein the circumferential side surface of the shell is convexly provided with comb teeth and is provided with an outgoing air hole, the shell is provided with a mounting cavity communicated with the outgoing air hole, the air guide cover is arranged in the mounting cavity, and is provided with a heating cavity and an air flow cavity, the heating cavity and the air flow cavity are communicated, and are distributed along the axial direction of the mounting cavity, the air guide cover is provided with an air guide inlet communicated with the heating cavity and a first air guide outlet, the first air guide outlet is arranged in the air flow cavity, and is arranged relative to the middle part of the shell, and the first air guide outlet is communicated with the outgoing air hole through the mounting cavity;

[0006] A handle, provided with a handle air inlet connected to the air guide inlet, and arranged close to the heating chamber; and

[0007] The hot air assembly comprises a heating element at least partially disposed in the heating cavity, and a fan disposed in the handle, wherein the fan is used to force air to flow through the heating element and into the air flow cavity.

[0008] In one embodiment, a plurality of first air guide outlets are provided and are arranged along the axial direction and the circumferential direction of the installation cavity, respectively. The aperture of the first air guide outlet decreases gradually in the axial direction of the installation cavity away from the handle end.

[0009] In one embodiment, the air guide cover also includes a plurality of second air guide outlets, the second air guide outlets are arranged in the heating chamber, and at least one of the second air guide outlets is arranged close to the airflow chamber, and the number of the second air guide outlets is less than that of the first air guide outlets.

[0010] In one embodiment, the circumference of the air guide cover has a first side and a second side in a first direction, and a third side and a fourth side in the second direction, the first direction and the second direction are arranged to intersect, the first air guide outlet arranged on the first side and / or the second side extends along the first direction, and the first air guide outlet arranged on the third side and / or the fourth side extends along the second direction.

[0011] In one embodiment, one of the first side and the second side of the air guide cover is provided with the first air guide outlet, and the other side is provided with a mounting rib, and the mounting rib abuts against the shell.

[0012] In one embodiment, in the first direction, at least one of the second air guiding outlets is disposed on the same side as the first air guiding outlet.

[0013] In one embodiment, the shell and the air guide cover are slidably connected via a slide groove structure, the slide groove structure extends axially along the installation cavity, the slide groove structure is arranged on the third side and the fourth side, and at least one of the first air guide outlets is arranged between the slide groove structure and the installation rib.

[0014] In one embodiment, the air guide cover also includes a limiting rib, which is arranged between the slide groove structure and the installation rib and abuts against the shell. The limiting rib, the installation rib and the shell enclose an air outlet cavity, and the shell is provided with an air outlet gap corresponding to the air outlet cavity. At least one of the first air guide outlets is arranged between one of the limiting ribs and the installation rib, and at least one of the first air guide outlets is arranged between one of the limiting ribs and the slide groove structure.

[0015] In one embodiment, at least one of the second air guide outlets is disposed between the limiting rib and the installation rib.

[0016] In one embodiment, the top of the air guide cover is close to the top of the shell, and the connection between the heating cavity and the airflow cavity is arranged in the middle of the installation cavity.

[0017] The hot air comb in the technical solution of the utility model comprises a comb, a handle and a hot air assembly, the comb comprises a shell and an air guide cover, the peripheral side of the shell is convexly provided with comb teeth and is provided with an outgoing air hole, the shell is provided with an installation cavity connected with the outgoing air hole, the air guide cover is arranged in the installation cavity, and is provided with a heating cavity and an air flow cavity, the heating cavity and the air flow cavity are connected and are distributed along the axial direction of the installation cavity, the air guide cover is provided with an air guide inlet connected with the heating cavity and a first air guide outlet, the first air guide outlet is arranged in the airflow and is arranged relative to the middle part of the shell, the first air guide outlet is connected with the outgoing air hole through the installation cavity, the handle is provided with a handle air inlet connected with the air guide inlet, and is arranged close to the heating cavity, the hot air assembly comprises a heating element at least partially arranged in the heating cavity, and a fan arranged on the handle, the fan is used to cause air to flow through the heating element and into the air flow cavity. The airflow flows into the air guide inlet from the handle air inlet under the agitation of the fan, and flows to the airflow cavity after being heated in the heating cavity, and sequentially passes through the first air guide outlet, the installation cavity and the outgoing air hole on the airflow cavity, and contacts the hair wrapped around the comb teeth to achieve the purpose of drying or styling. In this process, since the airflow is sprayed into the air guide cover from the air guide inlet under the agitation of the fan, and the fan, the heating cavity and the airflow cavity are distributed along the axial direction of the installation cavity, the airflow can flow rapidly along the axial direction of the installation cavity in the air guide cover, that is, most of the airflow will pass through the heating cavity and enter the airflow cavity under the trend of inertia, and flow out of the air guide cover through the first air guide outlet provided on the airflow cavity, so that the airflow flowing out of the outgoing air hole carries enough heat to achieve the purpose of drying or styling. Since users usually use the tooth comb near the middle and top of the shell to comb their hair, and when wrapping the hair around the shell for styling, they will instinctively wrap more hair around the middle and upper part of the shell to make the wrapping stable and not affect the grip of the handle. Therefore, the first air guide outlet is arranged relative to the middle of the shell. When the airflow flows from the first air guide outlet to the external air outlet, most of the airflow will flow out from the middle of the shell under the action of inertia, so as to concentrate on drying the hair entangled in the middle of the shell, which helps to increase the drying speed of the hair. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of an embodiment of a hot air comb provided by the utility model;

[0020] Figure 2 for Figure 1 an exploded view of the illustrated embodiment;

[0021] Figure 3 for Figure 1 A schematic structural diagram of the air guide cover in the illustrated embodiment;

[0022] Figure 4 for Figure 1 Another structural schematic diagram of the air guide cover in the illustrated embodiment;

[0023] Figure 5 for Figure 1 a top view of the illustrated embodiment;

[0024] Figure 6 for Figure 5 A cross-sectional view at AA in the middle;

[0025] Figure 7 for Figure 5 Another cross-sectional view at AA in the middle;

[0026] Figure 8 for Figure 7 Partial cross-sectional view at the middle BB.

[0027] Description of Figure Numbers:

[0028] 100, comb; 110, housing; 111, comb teeth; 112, outgoing air hole; 113, installation cavity; 120, air guide cover; 121, heating cavity; 122, air flow cavity; 123, air guide inlet; 124, first air guide outlet; 125, second air guide outlet; 126, first side; 127, second side; 128, third side; 129, fourth side; 130, installation rib; 131, slide groove structure; 132, limit rib; 133, air passage cavity;

[0029] 200, handle; 210, handle air inlet;

[0030] 300. hot air assembly; 310. heating element; 320. fan.

[0031] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0035] The utility model provides a hot air comb.

[0036] See also Figures 1 to 8In one embodiment of the utility model, the hot air comb includes a comb 100, a handle 200 and a hot air assembly 300. The comb 100 includes a shell 110 and an air guide cover 120. The shell 110 is provided with comb teeth 111 on the peripheral side and has an outgoing air hole 112. The shell 110 is provided with a mounting cavity 113 connected to the outgoing air hole 112. The air guide cover 120 is arranged in the mounting cavity 113 and is provided with a heating cavity 121 and an air flow cavity 122. The heating cavity 121 and the air flow cavity 122 are connected and distributed along the axial direction of the mounting cavity 113. The air guide cover 120 is provided with a heating cavity 121 and an air flow cavity 122. 1, the first air guide outlet 124 is arranged in the air flow cavity 122 and is arranged relative to the middle of the shell 110, the first air guide outlet 124 is connected with the outgoing air hole 112 through the installation cavity 113, the handle 200 is provided with a handle air inlet 210 connected with the air guide inlet 123, and is arranged close to the heating cavity 121, the hot air assembly 300 includes a heating element 310 at least partially arranged in the heating cavity 121, and a fan 320 arranged in the handle 200, the fan 320 is used to cause air to flow through the heating element 310 and into the air flow cavity 122. The air flow is driven by the fan 320, flows into the air guide inlet 123 from the handle air inlet 210, and flows to the air flow chamber 122 after being heated in the heating chamber 121, and passes through the first air guide outlet 124, the installation chamber 113 and the outgoing air hole 112 on the air flow chamber 122 in turn, and contacts the hair wrapped around the comb teeth 111 to achieve the purpose of drying or styling. In this process, since the airflow is driven by the fan 320 and ejected from the air inlet 123 into the air guide cover 120, and the fan 320, the heating chamber 121 and the airflow chamber 122 are distributed along the axial direction of the installation chamber 113, the airflow can flow quickly along the axial direction of the installation chamber 113 in the air guide cover 120, that is, most of the airflow will pass through the heating chamber 121 and enter the airflow chamber 122 under the trend of inertia, and flow out of the air guide cover 120 through the first air guide outlet 124 provided on the airflow chamber 122, so that the airflow flowing out of the external air hole 112 carries enough heat to achieve the purpose of drying or styling. Since the user usually uses the comb teeth 111 near the middle and top of the shell 110 to comb the hair, and when winding the hair around the shell 110 for styling, more hair will be instinctively wound around the middle and upper part of the shell 110 to make the winding stable and will not affect the grip handle 200. Therefore, the first air guide outlet 124 is arranged relative to the middle of the shell 110. When the airflow flows from the first air guide outlet 124 to the external air outlet 112, most of the airflow will flow out from the middle of the shell 110 under the action of inertia, so as to concentrate on drying the hair wrapped around the middle of the shell, which helps to increase the drying speed of the hair.

[0037] In one embodiment, a plurality of first air guide outlets 124 are provided, and are arranged along the axial direction and the circumferential direction of the installation cavity 113, respectively, and the aperture of the first air guide outlet 124 decreases toward the end away from the handle 200 in the axial direction of the installation cavity 113. That is, in the same row of first air guide outlets 124, the first air guide outlet 124 closer to the top of the air guide cover 120 has a smaller aperture, and the first air guide outlet 124 closer to the heating cavity 121 has a larger aperture. Since the airflow moves axially along the mounting cavity 113 in the air guide cover 120 and flows at a relatively fast speed, before the airflow collides with the top of the air guide cover 120, more airflow is emitted radially along the mounting cavity 113 at a position close to the top of the air guide cover 120, and less airflow is emitted radially along the mounting cavity 113 at a position close to the heating cavity 121. After the airflow collides with the top of the air guide cover 120, most of the airflow will be emitted radially along the mounting cavity 113 at the top of the air guide cover 120, but less airflow will be emitted radially along the mounting cavity 113 near the heating cavity 121. The aperture of the first air guide outlet 124 at the top of the air guide cover 120 is small, and only part of the air flow can pass through. Therefore, part of the air flow will flow back along the inner wall of the air guide cover 120, and in the process of backflow, it will flow out of the air guide cover 120 through the first air guide outlet 124 with gradually increasing aperture. At this time, the air flow can flow out evenly from the first air guide outlet 124 at different positions on the air flow cavity 122, so that the air flow can flow out evenly from the outgoing air holes 112 at different positions on the part of the housing 110 opposite to the air flow cavity 122. In other embodiments, the apertures of the first air guide outlets 124 can also be set to be the same.

[0038] In one embodiment, the air guide cover 120 further includes a plurality of second air guide outlets 125, which are disposed in the heating chamber 121, and at least one second air guide outlet 125 is disposed close to the air flow chamber 122, so that part of the refluxed airflow can flow out from the second air guide outlet 125, so as to compensate for the airflow of the outgoing air holes 112 on the housing 110 that are opposite to the heating chamber 121, and the number of the second air guide outlets 125 is less than the first air guide outlet 124, so as to prevent the unheated airflow from escaping from the second air guide outlet 125, thereby affecting the hot air efficiency of the heat fan. In other embodiments, the heating chamber 121 may not be provided with a second air guide outlet 125.

[0039] In one embodiment, the top of the air guide cover 120 is close to the top of the shell 110, and the connection between the heating chamber 121 and the airflow chamber 122 is located in the middle of the installation chamber 113. That is, in the axial direction of the installation chamber 113, the proportions of the heating chamber 121 and the airflow chamber 122 are similar, and due to the diffusion effect of the airflow and the compensation of the second air guide outlet 125, the shell 110 has a two-thirds to three-quarters area in the axial direction of the installation chamber 113 with a large air volume, and can achieve uniform air output, and this area is arranged close to the top of the shell 110 to meet the user's usage habits, so that the area of ​​the shell 110 that contacts more with the hair has more air volume and heat, thereby improving the energy utilization rate. In other embodiments, the connection between the heating chamber 121 and the airflow chamber 122 can also be arranged close to the middle and lower part of the installation chamber 113.

[0040] In one embodiment, the circumference of the air guide cover 120 has a first side 126 and a second side 127 in the first direction, and a third side 128 and a fourth side 129 in the second direction. The first direction and the second direction are arranged to intersect, and the first air guide outlet 124 provided on the first side 126 and / or the second side 127 extends along the first direction, and the first air guide outlet 124 provided on the third side 128 and / or the fourth side 129 extends along the second direction. That is, during production, the first air guide outlets 124 on the same side or opposite sides of the air guide cover 120 are processed and formed together in the same direction, which helps to reduce the time spent on the hole opening process. Further, the cross-sectional shape of the housing 110 is an ellipse, and its first direction is the short axis direction of the ellipse, and the second direction is the long axis direction of the ellipse. Therefore, the contact area between the housing 110 structure corresponding to the first side 126 and the second side 127 and the hair is the largest. Further, the number of the first air guide outlets 124 on the first side 126 and / or the second side 127 of the air guide cover 120 is greater than the number of the first air guide outlets 124 on the third side 128 and / or the fourth side 129, so that the airflow is evenly discharged in the circumferential direction of the housing 110. In other embodiments, the extension direction of the first air guide outlets 124 on the air guide cover 120 may be consistent with the radial direction of the air guide cover 120 at that location.

[0041] In one embodiment, one of the first side 126 and the second side 127 of the air guide cover 120 is provided with a first air guide outlet 124, and the other is provided with a mounting rib 130, the mounting rib 130 is in contact with the housing 110, and the mounting rib 130 can strengthen the supporting structure of the housing 110. Further, the third side 128 and the fourth side 129 are both provided with a first air guide outlet 124. Taking the first side 126 provided with the first air guide outlet 124 and the second side 127 provided with the mounting rib 130 as an example, after the structure corresponding to the second side 127 on the housing 110 is strengthened by the mounting rib 130, it can withstand a strong force, so when using a hot air comb, the comb teeth 111 on the area corresponding to the second side 127 on the housing 110 can be used to straighten the hair, and then the outgoing air holes 112 corresponding to the first side 126, the third side 128 and the fourth side 129 on the housing 110 can be used to dry or style the hair. In other embodiments, both the first side 126 and the second side 127 may be provided with a first air guide outlet 124 .

[0042] In one embodiment, in the first direction, at least one second air guide outlet 125 is disposed on the same side as the first air guide outlet 124. That is, when the first side 126 is provided with the first air guide outlet 124, the second air guide outlet 125 is also disposed on the first side 126 to compensate for the outgoing air hole 112 on the housing 110 corresponding to the first side 126. Further, the two second air guide outlets 125 are disposed on the same side as the first air guide outlet 124, and the two second powder guide outlets are arranged along the axial direction of the mounting cavity 113, and are both disposed close to the air flow cavity 122. In other embodiments, there may be no second air guide outlet 125 disposed on either the first side 126 or the second side 127.

[0043] In one embodiment, the housing 110 and the air guide cover 120 are slidably connected via a slide groove structure 131, which is provided on the third side 128 and the fourth side 129 to limit the opposite sides of the housing 110, and the slide groove structure 131 extends along the axial direction of the installation cavity 113. In the installation cavity 113, the installation ribs 130 and the slide groove structure 131 will hinder the airflow from flowing between the installation ribs 130 and the slide groove structure 131, so at least one first air guide outlet 124 is provided between a slide groove structure 131 and the installation ribs 130 to compensate for the outflow of the outgoing air hole 112 between the slide groove structure 131 and the installation ribs 130 on the housing 110, which helps to make the air flow of the housing 110 uniform. In other embodiments, the slide groove structure 131 may not be provided, and the housing 110 and the air guide cover 120 may be fixedly connected at the top by screws.

[0044] In one embodiment, the air guide cover 120 also includes a limiting rib 132, which is disposed between the slide groove structure 131 and the installation rib 130 and abuts against the shell 110. The limiting rib 132, the installation rib 130 and the shell 110 enclose an air passage cavity 133. The airflow in the installation cavity 113 is hindered by the limiting rib 132 and cannot flow into the air passage cavity 133. The shell 110 is provided with an air outlet gap corresponding to the air passage cavity 133, so that when the user uses the comb teeth 111 on the shell 110 opposite to the second side 127 to comb the hair, the hair can be dried or straightened. Therefore, at least one first air guide outlet 124 is required to be disposed between a limiting rib 132 and the installation rib 130 to provide airflow to the air outlet gap. Furthermore, the air outlet gap extends along the axial direction of the installation cavity 113, and at least one second air guide outlet 125 is provided between the limiting rib 132 and the installation rib 130 to compensate for the air volume at the lower part of the air outlet gap. At the same time, at least one first air guide outlet 124 is provided between a limiting rib 132 and the slide groove structure 131 to effectively compensate for the airflow between the slide groove structure 131 and the installation rib 130. In other embodiments, the limiting rib 132 and the air outlet gap may not be provided.

[0045] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A hot air comb, characterized in that: include: A comb, comprising a shell and an air guide cover, wherein the circumferential side surface of the shell is convexly provided with comb teeth and is provided with an outgoing air hole, the shell is provided with a mounting cavity communicated with the outgoing air hole, the air guide cover is arranged in the mounting cavity, and is provided with a heating cavity and an air flow cavity, the heating cavity and the air flow cavity are communicated, and are distributed along the axial direction of the mounting cavity, the air guide cover is provided with an air guide inlet communicated with the heating cavity and a first air guide outlet, the first air guide outlet is arranged in the air flow cavity, and is arranged relative to the middle part of the shell, and the first air guide outlet is communicated with the outgoing air hole through the mounting cavity; A handle, provided with a handle air inlet connected to the air guide inlet, and arranged close to the heating chamber; and The hot air assembly comprises a heating element at least partially disposed in the heating cavity, and a fan disposed in the handle, wherein the fan is used to force air to flow through the heating element and into the air flow cavity.

2. The hot air comb according to claim 1, characterized in that: There are multiple first air guide outlets, which are arranged along the axial direction and circumferential direction of the installation cavity respectively. The aperture of the first air guide outlet decreases gradually in the axial direction of the installation cavity away from the handle end.

3. The hot air comb according to claim 2, characterized in that: The air guide cover also includes a plurality of second air guide outlets, which are arranged in the heating chamber, and at least one of the second air guide outlets is arranged close to the air flow chamber, and the number of the second air guide outlets is less than that of the first air guide outlets.

4. The hot air comb according to claim 3, characterized in that: The circumference of the air guide cover has a first side and a second side in the first direction, and a third side and a fourth side in the second direction, the first direction and the second direction are arranged to intersect, the first air guide outlet arranged on the first side and / or the second side extends along the first direction, and the first air guide outlet arranged on the third side and / or the fourth side extends along the second direction.

5. The hot air comb according to claim 4, characterized in that: One of the first side and the second side of the air guide cover is provided with the first air guide outlet, and the other side is provided with a mounting rib, and the mounting rib is in contact with the shell.

6. The hot air comb according to claim 5, characterized in that: In the first direction, at least one of the second air guide outlets is disposed on the same side as the first air guide outlet.

7. The hot air comb according to claim 5, characterized in that: The shell and the air guide cover are slidably connected via a slide groove structure, the slide groove structure extends axially along the installation cavity, the slide groove structure is arranged on the third side and the fourth side, and at least one of the first air guide outlets is arranged between the slide groove structure and the installation rib.

8. The hot air comb according to claim 7, characterized in that: The air guide cover also includes a limiting rib, which is arranged between the slide groove structure and the installation rib and abuts against the shell. The limiting rib, the installation rib and the shell enclose an air outlet cavity, and the shell is provided with an air outlet gap corresponding to the air outlet cavity. At least one of the first air guide outlets is arranged between one of the limiting ribs and the installation rib, and at least one of the first air guide outlets is arranged between one of the limiting ribs and the slide groove structure.

9. The hot air comb according to claim 8, characterized in that: At least one of the second air guide outlets is disposed between the limiting rib and the mounting rib.

10. The hot air comb according to claim 1, characterized in that: The top of the air guide cover is close to the top of the shell, and the connection between the heating cavity and the air flow cavity is arranged in the middle of the installation cavity.

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