Machine head and integrated stove

Abstract

The utility model relates to the field of kitchen equipment, and specifically to a machine head and an integrated stove, including a panel, a back panel, an upper cover and a sound insulation board; the upper cover, the panel, and at least part of the back panel constitute at least part of a smoke collecting chamber, the sound insulation board is located in the smoke collecting chamber, and an air inlet is provided on the panel; at least one convex deformation part is provided on the sound insulation board, and the convex deformation part and the sound insulation board constitute a noise reduction cavity. In view of the technical problem that traditional machine heads have large noise defects, the utility model uses the convex deformation part on the sound insulation board and the noise reduction cavity formed by the sound insulation board, so that the noise can continuously oscillate and attenuate in the noise reduction cavity, thereby achieving the noise reduction effect of the machine head.

Description

Technical Field

[0001] The utility model relates to the field of kitchen equipment, in particular to a machine head and an integrated stove. Background Art

[0002] The traditional integrated stove head is generally composed of a front plate and a rear plate fixedly connected. The working principle of the traditional integrated stove head is that the integrated stove head is fixedly connected to the fan cabinet, and the fan in the integrated stove cabinet sucks air, so that the smoke collecting chamber inside the integrated stove head produces negative pressure, so that the gas carrying oil smoke will enter the smoke collecting chamber from the outside of the integrated stove head, and finally pass through the fan cabinet and be discharged to the outside through the flue. In this process, the gas enters from the air inlet of the integrated stove head and enters the smoke collecting chamber. The gas will generate vortices during the flow inside the smoke collecting chamber, which will cause high airflow noise inside the smoke collecting chamber of the integrated stove head. Utility Model Content

[0003] In order to solve the technical problem that traditional machine heads have large noise defects, the utility model provides a machine head and an integrated stove, which form a noise reduction cavity through a raised deformation portion and a sound insulation board or a backboard, so that the noise can continuously oscillate and decay in the noise reduction cavity, thereby achieving the noise reduction effect of the machine head.

[0004] The technical solution provided by the utility model is: a machine head, including a panel, a back panel, an upper cover and a sound insulation board; the upper cover, the panel, and at least a part of the back panel constitute at least a part of a smoke collecting chamber, the sound insulation board is located in the smoke collecting chamber, and the panel is provided with an air inlet; at least one convex deformation portion is provided on the sound insulation board, and the convex deformation portion and the sound insulation board constitute at least a part of a noise reduction cavity.

[0005] Optionally, when the protruding direction of the protruding deformation portion is from the sound insulation board to the panel, the width of the protruding deformation portion gradually converges from the side of the sound insulation board away from the upper cover to the side close to the upper cover.

[0006] Optionally, the projection deformation portion has a top angle a on a projection surface perpendicular to the sound insulation board, and the top angle a is in a range of 1° to 30°.

[0007] Optionally, a plurality of silencer holes are provided on the convex deformation portion, and the silencer holes are connected to the noise reduction cavity.

[0008] Optionally, a circumferential cavity is provided on the upper side of the sound insulation board, and / or on at least one of the left and right sides of the sound insulation board, and / or between the sound insulation board and the back plate.

[0009] Optionally, there is a first gap between the upper cover and a side edge located at an upper portion of the sound insulation plate, and the first gap constitutes at least a portion of the circumferential cavity.

[0010] Optionally, at least one of the left and right sides of the panel is provided with an outer panel and an inner panel, the distance between the outer panel and the center of the panel is greater than the distance between the inner panel and the center of the panel, the inner panel is fixedly connected to the side of the sound insulation board, and the outer panel is fixedly connected to the side of the back panel; the inner panel, the outer panel, the side of the sound insulation board and the side of the back panel enclose at least part of the circumferential cavity.

[0011] Optionally, there is a second gap between the sound insulation plate and the back plate, and the second gap constitutes at least a part of the circumferential cavity.

[0012] Optionally, a sound absorbing material or an attenuation structure is arranged in the circumferential cavity.

[0013] Optionally, the panel is at least partially recessed toward the back panel to form a drainage portion, and the air inlet is located in the drainage portion.

[0014] Optionally, the drainage portion includes at least one of a top drainage slope, a side drainage slope and a bottom drainage slope, and the top drainage slope, the side drainage slope and the bottom drainage slope are all located on the panel and are inclined toward the air inlet.

[0015] Optionally, a flow-guiding surface protruding away from the back plate is arranged around the air inlet.

[0016] Optionally, a top baffle is provided on the upper portion of the sound insulation board, and the sound insulation board is fixedly connected to the panel through the top baffle, and the connection position between the top baffle and the panel is higher than the air inlet, and there is an angle between the top baffle and the vertical plane where the air inlet is located, and the angle is 30° to 60°.

[0017] Optionally, it also includes a flap, a fixing part and a rotating bracket, the flap is located on the outside of the air inlet, the fixing part is fixedly arranged on the side of the panel close to the back panel, one end of the rotating bracket is hinged to the fixing part, and the other end of the rotating bracket is fixedly connected to the flap; a driving part is arranged between the panel and the back panel, and the output end of the driving part is dynamically connected to the rotating bracket.

[0018] An integrated stove comprises the above-mentioned machine head.

[0019] Beneficial Effects

[0020] The technical solution provided by the utility model has the following beneficial effects compared with the prior art: in order to solve the technical problem that the traditional machine head has a large noise defect, the utility model uses the noise reduction cavity formed by the raised deformation part on the sound insulation board and the sound insulation board, so that the noise can continuously oscillate and decay in the noise reduction cavity, thereby achieving the noise reduction effect of the machine head. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is one of the structural schematic diagrams of a machine head proposed in an embodiment of the utility model.

[0022] Figure 2 This is one of the exploded schematic diagrams of the structure of a machine head proposed in an embodiment of the utility model.

[0023] Figure 3 This is a second exploded schematic diagram of the structure of a machine head proposed in an embodiment of the utility model.

[0024] Figure 4 This is a schematic structural diagram of a sound insulation board proposed in an embodiment of the utility model.

[0025] Figure 5 This is an enlarged schematic cross-sectional view of the sound insulation board proposed in an embodiment of the utility model.

[0026] Figure 6 This is a rendering of the airflow effect of the air duct inside the smoke collecting chamber proposed in an embodiment of the utility model.

[0027] Figure 7 for Figure 1 The schematic cross-sectional view with plane A as the cross section.

[0028] Figure 8 for Figure 1 The schematic cross-sectional view with plane B as the cross section.

[0029] Fig. 9 This is a schematic diagram of the structure of the drainage part proposed in the embodiment of the utility model.

[0030] Fig.10 This is a second structural schematic diagram of a machine head proposed in an embodiment of the utility model.

[0031] Fig.11 for Fig.10 Schematic diagram of the local structure corresponding to the implementation method.

[0032] Fig.12 for Fig.10 Schematic cross-sectional view corresponding to the implementation method. DETAILED DESCRIPTION

[0033] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.

[0034] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It should also be noted that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings. The words "first", "second", etc. described in the present utility model are set for the convenience of describing the technical solution of the present utility model, and have no specific limiting effect. They are all general references and do not constitute a limiting effect on the technical solution of the present utility model. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments in the present application can be combined with each other. In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is 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, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Multiple technical solutions in the same embodiment, and multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not have contradictions or conflicts, all of which are within the scope of protection required by the present utility model.

[0035] Example 1

[0036] The present embodiment proposes a machine head, comprising a panel 10, a back panel 20, an upper cover 30 and a sound insulation board 201; the upper cover 30, the panel 10, and at least a portion of the back panel 20 constitute at least a portion of the smoke collecting chamber 80, the sound insulation board 201 is located in the smoke collecting chamber 80, and an air inlet 105 is provided on the panel 10; at least one convex deformation portion 207 is provided on the sound insulation board 201, and the convex deformation portion 207 and the sound insulation board 201 constitute a noise reduction cavity 31.

[0037] Combined with Figure 1-6In a machine head of this embodiment, the panel 10, at least part of the panel 10 and at least part of the back panel 20 form a smoke collecting chamber 80, and the smoke collecting chamber 80 is connected to the lower cabinet of the fan. When the fan in the lower cabinet is started, the lower cabinet and the smoke collecting chamber 80 form a negative pressure, and the gas carrying oil smoke will be sucked from the air inlet 105 outside the machine head, enter the smoke collecting chamber 80 and the lower cabinet, and be discharged from the flue, so as to realize the function of extracting oil smoke. In the above-mentioned process of extracting oil smoke, this embodiment uses the convex deformation part 207 set on the sound insulation board 201 and at least part of the noise reduction cavity 31 formed by the sound insulation board 201, so that the noise can continuously oscillate and decay in the noise reduction cavity 31, thereby achieving the noise reduction effect of the machine head.

[0038] In this embodiment, the sound insulation board 201 is located inside the smoke collecting chamber 80, so that the noise existing on the connecting path from the air inlet 105 to the lower cabinet can be fully reflected by the sound insulation board 201, so that the raised deformation part 207 on the sound insulation board 201 can better play a role in attenuating the oscillation of the noise.

[0039] In this embodiment, the convex deformation part 207 is a convex profile, a convex surrounding structure or other convex structures provided on the sound insulation board 201, and a single convex deformation part 207 can be convex toward the sound insulation board 201 or the back plate 20. Taking a single convex deformation part 207 as a convex profile as an example, when the single convex deformation part 207 is convex toward the sound insulation board 201, at least a part of the noise reduction cavity 31 can be formed between it and the back plate 20; when the single convex deformation part 207 is convex toward the back plate 20, at least a part of the noise reduction cavity 31 can be formed between it and the sound insulation board 201.

[0040] One or more convex deformation parts 207 may be provided, and it is obvious that the noise reduction effect is better when multiple convex deformation parts 207 are provided. When multiple convex deformation parts 207 are provided, different convex deformation parts 207 may have different convex directions, that is, some convex deformation parts 207 convex toward the sound insulation board 201, and some convex deformation parts 207 convex toward the back plate 20.

[0041] When there are multiple protruding deformation parts 207 , the arrangement of the protruding deformation parts 207 is not unique. In one embodiment, the protruding deformation parts 207 can be arranged at intervals along the width direction of the sound insulation board 201 .

[0042] Furthermore, when the protruding direction of the protruding deformed portion 207 is protruding from the sound insulation board 201 to the panel 10, the width of the protruding deformed portion 207 can gradually converge from the side of the sound insulation board 201 away from the upper cover 30 to the side close to the upper cover 30, forming a structure such as a pyramid, a cone, or a truncated cone. At this time, for the airflow sucked into the air inlet 105, along the flow direction of the airflow, the protruding deformed portion 207 forms a structural form from narrow to wide. At this time, the protruding deformed portion 207 plays a role of "breaking the wind" of the airflow, so as to evacuate and divert the airflow in the smoke collecting chamber 80, thereby reducing the noise generated by the gas flow.

[0043] Combined with the above-mentioned embodiments, in a more preferred embodiment, the raised deformation part 207 is a conical or pyramidal profile, with the smallest width at one end close to the upper cover 30 and the largest width at the other end, and a uniform transition in the middle. At this time, the projection surface of the raised deformation part 207 perpendicular to the direction of the sound insulation board 201 has a top angle a, and the angle a determines the geometric shape of the cone or pyramid, that is, determines the width or curvature of the bottom of the raised deformation part 207. In a desirable embodiment, the angle of the top angle a is 1° to 30°. Taking the raised deformation part 207 as a whole as an example of a cone, it has been verified by experiments that when the top angle a of the triangle is 2° and the arc length of the bottom of the raised deformation part 207 is 76 mm, the "wind-breaking" noise reduction effect of the raised deformation part 207 is the best.

[0044] In a further embodiment, a plurality of silencer holes 208 connected to the noise reduction cavity 31 are provided on the raised deformation portion 207. The airflow can pass through the silencer holes 208 and more easily enter at least a portion of the noise reduction cavity 31 formed by the raised deformation portion 207 and the head back plate 20 or the panel 10, thereby consuming multi-dimensional reflections inside and achieving a better noise reduction effect.

[0045] It is conceivable that the protruding deformation portion 207 and the muffler hole 208 on the sound insulation board 201 can be completed by stamping during the production process, so this embodiment can achieve a lower noise reduction cost.

[0046] Combined with Figure 7 and 8 In order to further improve the noise reduction effect of the machine head, a circumferential cavity 32 can be set around the sound insulation board 201. When the lower cabinet fan is running, the noise transmitted by the fan to the smoke collecting chamber 80 or the noise formed by the air flow vortex in the smoke collecting chamber 80 will enter the circumferential cavity 32, and then be reflected and consumed in the circumferential cavity 32, and the oscillation will be attenuated, so that the integrated stove machine head can achieve better sound insulation and noise reduction effect.

[0047] The circumferential cavity 32 can be located on both sides of the width direction of the sound insulation board 201, can be located on the upper side in the height direction, or can be located on the side of the sound insulation board 201 facing the back plate 20. The circumferential cavity 32 can exist at the above positions at the same time, or can be set at only one or several of them. When there are multiple circumferential cavities 32, the cavities can be interconnected to form a whole. When the aforementioned circumferential spaces exist, the circumferential space of the sound insulation board 201 is almost completely surrounded by the circumferential cavity 32, so that the layout space of the integrated stove head can be fully utilized, and the sound insulation and noise reduction effect can be fully exerted according to the propagation path of the noise.

[0048] In one embodiment, when there is a first gap between the upper cover 30 and the side edge located at the upper portion of the sound insulation board 201 , the first gap constitutes a circumferential cavity 32 on the upper side of the sound insulation board 201 .

[0049] In one embodiment, there is a second gap between the sound insulation plate 201 and the back plate 20 , and the second gap constitutes at least a portion of the circumferential cavity 32 .

[0050] In one embodiment, at least one of the left and right sides of the panel 10 is provided with an outer panel 101 and an inner panel 102, the distance between the outer panel 101 and the center of the panel 10 is greater than the distance between the inner panel 102 and the center of the panel 10, the inner panel 102 is fixedly connected to the side of the sound insulation board 201, and the outer panel 101 is fixedly connected to the side of the back panel 20; the inner panel 102, the outer panel 101, the side of the sound insulation board 201 and the side of the back panel 20 enclose at least part of the circumferential cavity 32 on both sides of the width direction of the sound insulation board 201.

[0051] If the circumferential cavity 32 is a closed structure, in addition to the sound insulation and noise reduction function, the circumferential cavity 32 can also be used to place and install accessories such as electrical components. In this case, the circumferential cavity 32 can prevent the oil smoke gas in the smoke collecting cavity 80 from contacting with the electrical components and other accessories inside the integrated stove head. In addition, due to the limited head space, the existence of the closed circumferential cavity 32 has the effect of compressing the volume of the smoke collecting cavity 80, making it easier to form a negative pressure space, and the negative pressure is relatively larger under the same wind force, so that the oil smoke is more efficiently sucked.

[0052] In a further embodiment, in order to further enhance the noise reduction effect, a sound-absorbing material such as sound-absorbing cotton may be provided in the circumferential cavity 32, or an attenuation noise reduction structure such as a perforated plate or a micro-slit plate may be added to further enhance the noise reduction effect.

[0053] Combined with Figure 6In order to better achieve the oil fume absorption effect of the air inlet 105, in one embodiment, the panel 10 is at least partially recessed toward one side of the back plate 20 to form a recessed guide portion 40, and the air inlet 105 is located in the recessed guide portion 40. The recessed panel 10 in the guide portion 40 forms a guide surface, thereby guiding the airflow to the air inlet 105. In a preferred embodiment, the air inlet 105 is located at the deepest recess of the guide portion 40.

[0054] Combined with Fig. 9 In a further embodiment, the drainage portion 40 includes at least one of a top drainage slope 401, a lateral drainage slope 402, and a bottom drainage slope 403 formed by the panel 10 being recessed inward, corresponding to the rectangular air inlet 105. When the top drainage slope 401, the lateral drainage slope 402, and the bottom drainage slope 403 are all present, a better drainage effect can be achieved.

[0055] During the cooking process, oil smoke rises quickly, and since the air flow conditions near the air inlet 105 are more complicated, the oil smoke may overflow over the air inlet 105. Therefore, when there is a top drainage slope 401, part of the rising oil smoke can be blocked, preventing the oil smoke from escaping to a certain extent.

[0056] In a further embodiment, the periphery of the air inlet 105 may be provided with a slightly convex slope surface facing away from the back panel 20 as a guide surface 107 for "breaking the wind", that is, destroying the incoming air flow vortex and reducing the agitation of the air flow vortex, thereby making the air intake of the air inlet 105 smoother.

[0057] Example 2

[0058] Compared with the technical solution of Example 1, a head of the present embodiment can be improved as follows: a top baffle 204 is provided on the upper part of the sound insulation board 201, and the sound insulation board 201 is fixedly connected to the panel 10 through the top baffle 204. The connection position of the top baffle 204 and the panel 10 is higher than the air inlet 105. There is an angle between the top baffle 204 and the vertical plane where the air inlet 105 is located, and the angle is 30° to 60°.

[0059] Combined with Figure 2 , 3 , 4, 8 and 12, in the present embodiment, the sound insulation board 201 is fixedly connected to the panel 10 via a top baffle 204. The setting of the top baffle 204 makes the two sides of the top baffle 204 become relatively independent spaces. In combination with the aforementioned embodiment, optionally, the top baffle 204 can be used to form a circumferential cavity 32 on the upper side of the sound insulation board 201.

[0060] In this embodiment, the top baffle 204 and the vertical plane where the air inlet 105 is located are not perpendicular to each other, that is, the top baffle 204 and the vertical plane where the air inlet 105 is located form an inclination angle, which can be selected to be 30° to 60°. In a more preferred embodiment, the inclination angle can be set to 45°, which is used to better guide the fluid when sucking oil smoke, to a certain extent avoid the irregular fluid turbulence after the oil smoke enters the smoke collecting chamber 80, reduce turbulence, avoid slow air intake affecting efficiency, and also to a certain extent avoid the generation of local airflow noise.

[0061] Example 3

[0062] Compared with the technical solutions of Examples 1 or 2, a head of the present embodiment can be improved as follows: it also includes a flap 303, a fixing member 301 and a rotating bracket 302, the flap 303 is located on the outside of the air inlet 105, the fixing member 301 is fixedly arranged on the side of the panel 10 close to the back panel 20, one end of the rotating bracket 302 is hinged to the fixing member 301, and the other end of the rotating bracket 302 is fixedly connected to the flap 303; a driving member 304 is arranged between the panel 10 and the back panel 20, and the output end of the driving member 304 is power-connected to the rotating bracket 302.

[0063] Combined with Figure 10-12 In this embodiment, the flap 303 can be turned over and opened and closed through the transmission connection of the fixing member 301, the rotating bracket 302, the flap 303 and the driving member 304. When cooking, the flap 303 is opened, and the flap 303 is located on the upper side of the air outlet, in a horizontal or tilted state to a certain extent, which is used to collect oil smoke, slow down the rapid rise and escape of oil smoke, increase the smoke collection area of ​​the integrated stove head, and allow the air inlet 105 to have enough time and space to absorb oil smoke. When cooking is finished, the driving member 304 drives the flap 303 to rotate, thereby realizing the storage of the flap 303. In an optional embodiment, the driving member 304 is an electric push rod or a motor, and the output end of the electric push rod directly or indirectly drives the rotating bracket 302 to rotate, and the motor can directly or indirectly drive the rotating bracket 302 to rotate with its hinged position with the fixing member 301 as the rotation center.

[0064] Example 4

[0065] Combined with Figure 1-12 This embodiment proposes an integrated stove, including a head of any one of the technical solutions of embodiments 1-3.

[0066] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creative design without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A machine head, characterized in that: The invention comprises a panel (10), a back panel (20), an upper cover (30) and a sound insulation board (201); the upper cover (30), the panel (10) and at least a part of the back panel (20) constitute at least a part of a smoke collecting chamber (80); the sound insulation board (201) is located in the smoke collecting chamber (80); an air inlet (105) is provided on the panel (10); at least one protruding deformation portion (207) is provided on the sound insulation board (201); the protruding deformation portion (207) and the sound insulation board (201) constitute at least a part of a noise reduction cavity (31).

2. A machine head according to claim 1, characterized in that: When the protruding direction of the protruding deformation portion (207) is protruding from the sound insulation board (201) toward the panel (10), the width of the protruding deformation portion (207) gradually converges from the side of the sound insulation board (201) away from the upper cover (30) to the side close to the upper cover (30).

3. A machine head according to claim 2, characterized in that: The projection surface of the convex deformation portion (207) perpendicular to the sound insulation board (201) has a top angle a, and the angle of the top angle a is 1° to 30°.

4. A machine head according to claim 1, characterized in that: A plurality of silencer holes (208) are provided on the protruding deformation portion (207), and the silencer holes (208) are communicated with the noise reduction cavity (31).

5. A machine head according to claim 1, characterized in that: A circumferential cavity (32) is provided on the upper side of the sound insulation board (201), and / or on at least one of the left and right sides of the sound insulation board (201), and / or between the sound insulation board (201) and the back plate (20).

6. A handpiece according to claim 5, characterized in that: There is a first gap between the upper cover (30) and the side edge located at the upper part of the sound insulation board (201), and the first gap constitutes at least a part of the circumferential cavity (32).

7. A handpiece according to claim 5, characterized in that: At least one of the left and right sides of the panel (10) is provided with an outer plate (101) and an inner plate (102); the distance between the outer plate (101) and the center of the panel (10) is greater than the distance between the inner plate (102) and the center of the panel (10); the inner plate (102) is fixedly connected to the side edge of the sound insulation board (201); and the outer plate (101) is fixedly connected to the side edge of the back plate (20); the inner plate (102), the outer plate (101), the side edge of the sound insulation board (201) and the side edge of the back plate (20) enclose at least part of the circumferential cavity (32).

8. A handpiece according to claim 5, characterized in that: There is a second gap between the sound insulation board (201) and the back plate (20), and the second gap constitutes at least a part of the circumferential cavity (32).

9. A handpiece according to claim 5, characterized in that: A sound absorbing material or a damping structure is arranged in the circumferential cavity (32).

10. A handpiece according to claim 1, characterized in that: The panel (10) is at least partially recessed in the direction of the back panel (20) to form a flow guide portion (40), and the air inlet (105) is located in the flow guide portion (40).

11. A handpiece according to claim 10, characterized in that: The drainage portion (40) comprises at least one of a top drainage slope (401), a side drainage slope (402) and a bottom drainage slope (403); the top drainage slope (401), the side drainage slope (402) and the bottom drainage slope (403) are all located on the panel (10) and are all inclined toward the air inlet (105).

12. A handpiece according to claim 1, characterized in that: The air inlet (105) is provided with a flow-guiding profile (107) convex in a direction away from the back plate (20) in the circumferential direction.

13. A handpiece according to claim 1, characterized in that: A top baffle (204) is provided on the upper part of the sound insulation board (201); the sound insulation board (201) is fixedly connected to the panel (10) via the top baffle (204); the connection position of the top baffle (204) and the panel (10) is higher than the air inlet (105); there is an angle between the top baffle (204) and the vertical plane where the air inlet (105) is located, and the angle is 30° to 60°.

14. A handpiece according to claim 1, characterized in that: It also includes a flap (303), a fixing member (301) and a rotating bracket (302), wherein the flap (303) is located on the outside of the air inlet (105), the fixing member (301) is fixedly arranged on the side of the panel (10) close to the back panel (20), one end of the rotating bracket (302) is hinged to the fixing member (301), and the other end of the rotating bracket (302) is fixedly connected to the flap (303); a driving member (304) is arranged between the panel (10) and the back panel (20), and the output end of the driving member (304) is connected to the rotating bracket (302) in a power manner.

15. An integrated stove, characterized in that: A nose comprising any one of claims 1-14.

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