Air intake noise reduction structure and air conditioning range hood

Abstract

This invention relates to the field of air conditioning technology, and discloses an air intake noise reduction structure and an air conditioning range hood. The air intake noise reduction structure includes: an air intake plate with an air inlet; and a noise reduction channel disposed within the air inlet. The noise reduction channel includes noise reduction holes formed inside the air intake plate and a guide channel connecting the noise reduction holes and the air inlet. The guide channel has a guide surface suitable for gradually guiding the airflow and / or sound waves entering from the air inlet to the noise reduction holes. The air conditioning range hood includes: a main air inlet on a smoke hood; and an auxiliary air inlet on the smoke hood, on which the aforementioned air intake noise reduction structure is installed. This invention, without changing the size of the air inlet area, guides the airflow and sound waves entering from the air inlet to the noise reduction holes of the air intake plate through a guide channel set on the inner circumference of the air inlet. The noise reduction holes utilize multiple reflections of noise at the air inlet to dissipate sound wave energy, thereby achieving noise reduction.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically to an air intake noise reduction structure and an air conditioning range hood. Background Technology

[0002] The kitchen is the main place where people cook, and the quality of the kitchen air environment directly affects people's cooking experience. During cooking, the kitchen is filled with heat, fumes, and grease, polluting the environment. Especially in the hot summer, the kitchen becomes like a sauna, with high temperature and humidity, greatly affecting people's mood while cooking. Therefore, air-conditioning range hoods have emerged to address this issue. Air-conditioning range hoods can effectively reduce the temperature around people during cooking, creating a more comfortable kitchen environment for users.

[0003] However, compared to ordinary range hoods, air-conditioning range hoods have additional fans for both the evaporator and condenser, resulting in significantly higher overall noise levels. Most of the noise from an air-conditioning range hood is radiated outwards through the air inlet. To ensure effective smoke extraction, the range hood needs a sufficient air intake area; however, the larger the air intake area, the greater the noise radiated from the air inlet. To address these issues, air-conditioning range hoods require an air inlet structure that ensures both sufficient air intake area and noise reduction. Summary of the Invention

[0004] In view of this, the present invention provides an air intake noise reduction structure and an air conditioning range hood that ensures the air intake area while reducing noise, so as to solve the problem that it is difficult to balance the air intake area and noise reduction in the prior art.

[0005] In a first aspect, the present invention provides an air intake noise reduction structure, comprising:

[0006] Air inlet panel, with air inlet provided;

[0007] The noise reduction channel is set inside the air inlet. The noise reduction channel includes noise reduction holes opened inside the air inlet plate and a guide channel connecting the noise reduction holes and the air inlet.

[0008] The airflow channel has a guide surface suitable for guiding the airflow entering from the air inlet and / or guiding the sound waves to the noise reduction hole.

[0009] Beneficial effects: Without changing the size of the air inlet area, by setting a noise reduction channel on the inner circumference of the air inlet, and setting a guide channel and guide surface on the inner circumference wall of the air inlet to guide the airflow to flow in all directions, the airflow and sound waves entering from the air inlet can be guided to the tiny and narrow noise reduction holes in the air inlet plate. The tiny and narrow noise reduction holes are used to reflect the noise at the air inlet multiple times to consume the sound wave energy, thereby achieving the purpose of noise reduction. This effectively solves the problem of difficulty in balancing the air inlet area and noise reduction in existing air conditioning range hoods.

[0010] In one optional implementation, the flow channel includes a flow guide section, the cross-sectional area of ​​which gradually increases from the air inlet toward the noise reduction hole;

[0011] The airflow guide surface is set as an inclined plane or arc surface on the windward side of the air inlet, which is suitable for guiding the airflow towards the noise reduction hole.

[0012] Beneficial effects: By designing a guide section with a gradually increasing cross-sectional area from the air inlet towards the noise reduction hole, and setting the guide surface as an inclined plane or arc surface on the windward side of the air inlet, the guide surface can meet part of the airflow entering from the air inlet, changing the flow direction of this part of the airflow from a direction parallel to the axis of the air inlet to a direction branching outwards at a set angle to the central axis of the air inlet. This guides the airflow into the noise reduction hole, where the sound waves are continuously consumed, thus achieving noise reduction. Furthermore, by setting the guide surface of the guide channel as an inclined straight surface or arc surface, instead of using a right-angle bend, it is effectively ensured that at least part of the airflow and sound waves can enter the branching guide channel when the gas enters the air inlet.

[0013] In one optional embodiment, the air inlet plate has multiple layers of noise reduction holes, each layer of noise reduction holes including multiple first noise reduction holes, and the noise reduction holes of adjacent layers are arranged alternately.

[0014] Beneficial effects: By setting multiple layers of noise reduction holes and multiple first noise reduction holes in each layer, the noise reduction effect can be further improved without affecting the air intake volume.

[0015] In one alternative implementation, one end of the noise reduction hole is connected to the airflow channel, and the other end extends to the edge of the air inlet plate.

[0016] Beneficial effects: By extending the end of the noise reduction hole to a position close to the edge of the air inlet plate, the first noise reduction hole is longer, and the sound waves can be reflected multiple times inside it and continuously consumed, thereby further improving the noise reduction effect.

[0017] In one optional embodiment, the diameter of the first noise reduction hole is 2mm to 5mm, and the hole spacing is 6mm to 14mm.

[0018] Beneficial effects: By designing the aperture and spacing of the holes as described above, the structural strength of the air inlet plate is ensured while the aperture of the first noise reduction hole is smaller, the arrangement is more compact, and the number is greater, thus resulting in a better noise reduction effect.

[0019] In one optional implementation, the air intake noise reduction structure further includes:

[0020] An air outlet plate is designed to be fitted with an air inlet plate to form an air inlet cavity, and an air outlet is provided on the air outlet plate.

[0021] The sound-absorbing structure is set inside the air inlet cavity. The airflow enters the air inlet through the air inlet, is reduced by the noise reduction channel, and then enters the air inlet cavity. After passing through the sound-absorbing structure, it is discharged from the air outlet.

[0022] Beneficial effects: By setting a sound-absorbing structure between the air inlet and air outlet panels, the noise generated in the air inlet cavity due to air flow or airflow colliding with the air inlet and air outlet panels is absorbed, thereby achieving the purpose of sound absorption and further realizing noise reduction.

[0023] In one optional embodiment, along the width direction of the air inlet plate, the air inlet plate includes a central region located in the middle and two side regions distributed on both sides of the central region. The air inlet is opened in the central region of the air inlet plate, and the air outlet is opened in the central region of the air outlet plate along the width direction.

[0024] The sound-absorbing structure includes two sets of sound-absorbing cotton placed inside the air inlet cavity, with the two sets of sound-absorbing cotton corresponding to the two side areas of the air inlet plate respectively.

[0025] Beneficial effects: The sound insulation cotton installed between the air inlet and air outlet panels further reduces noise and ensures a certain level of smoke absorption. In addition, the two sets of sound-absorbing cotton are installed on the two sides of the air inlet panel, avoiding the air inlet and air outlet. This forms an air passage in the middle of the air inlet cavity that connects to the air inlet and air outlet respectively, without interfering with the normal flow of air and preventing the sound-absorbing cotton from affecting the amount of air entering and leaving the room.

[0026] In one optional embodiment, two sets of air inlets are spaced apart along the length of the air inlet plate;

[0027] The air outlet is located in the middle of the length of the air outlet panel, between the two sets of air inlets.

[0028] Beneficial effects: The two sets of air inlets on the air inlet plate can increase the air intake area, and the air outlet set between the two sets of air inlets can enable the air outlet plate to gather the air intake air and guide it to the front of the smoke hood fan.

[0029] Secondly, the present invention also provides an air conditioning range hood, comprising:

[0030] Smoke hood;

[0031] The main air inlet of the range hood is located on the smoke collection hood;

[0032] The air intake noise reduction structure of any of the above embodiments is installed on the smoke collection hood located above the main air inlet of the smoke hood, and the air inlet of the air intake noise reduction structure serves as the auxiliary air inlet of the smoke hood.

[0033] Beneficial effects: The main air inlet of the range hood is the primary air intake for the air conditioner range hood. To ensure the range hood's smoke extraction effect, an auxiliary air inlet is set up as a secondary air intake to increase the air intake area of ​​the range hood. The auxiliary air inlet is mainly used to further enhance the smoke extraction effect of the air conditioner range hood. By setting the aforementioned air intake noise reduction structure on the smoke collection hood, the air intake of the air intake noise reduction structure is used as the auxiliary air intake of the range hood. This can ensure the air intake area while achieving noise reduction. The noise reduction effect at the range hood air intake has been tested to be at least 0.5dB. Thus, while effectively ensuring the smoke extraction and cooling effects of the air conditioner range hood, a relatively ideal noise reduction effect can also be achieved.

[0034] In one alternative implementation, the air conditioner range hood further includes:

[0035] The smoke hood module includes a smoke collection hood and a fan module installed above the smoke collection hood;

[0036] An air conditioning module is located above the range hood module. The top of the air conditioning module has an air conditioning inlet, and the inner circumference of the air conditioning inlet has multiple second noise reduction holes spaced apart.

[0037] In one optional implementation, the second noise reduction aperture has two or more layers. The noise reduction effect can be further improved by using multiple layers of second noise reduction apertures.

[0038] In one alternative implementation, the air conditioning module includes an air conditioning inlet / outlet panel disposed on the top of the unit.

[0039] The air conditioner air inlet includes several grille holes spaced apart on the air conditioner air inlet and outlet panel, and each grille hole has multiple secondary noise reduction holes on its inner circumference.

[0040] Beneficial effects: By creating several grille holes on the air inlet and outlet panels of the air conditioner, and setting multiple noise-reducing micro-holes in each grille hole, a noise reduction structure for the air inlet of the air conditioner range hood is formed.

[0041] In one alternative implementation, the air conditioner air inlet and outlet panel is also provided with an air conditioner outlet and a range hood outlet. Attached Figure Description

[0042] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the air intake noise reduction structure in an embodiment of the present invention;

[0044] Figure 2 This is a schematic diagram of the disassembled air inlet and air outlet panels of the air intake noise reduction structure in an embodiment of the present invention;

[0045] Figure 3 This is a schematic diagram of the air inlet plate in an embodiment of the present invention;

[0046] Figure 4 For this Figure 3 Top view;

[0047] Figure 5 for Figure 4 A cross-sectional view along the AA direction;

[0048] Figure 6 for Figure 4 Cross-sectional view along the BB direction;

[0049] Figure 7 This is a partial enlarged cross-sectional view of the area where the air inlet plate has noise reduction holes in an embodiment of the present invention;

[0050] Figure 8 This is a front view of the air conditioner range hood in an embodiment of the present invention;

[0051] Figure 9 This is an internal front view of the air conditioner range hood in an embodiment of the present invention;

[0052] Figure 10 for Figure 9 A cross-sectional view along the CC direction;

[0053] Figure 11 This is a schematic diagram of the air conditioner's air inlet and outlet panels in an embodiment of the present invention;

[0054] Figure 12 for Figure 11 Enlarged view at point D;

[0055] Figure 13 for Figure 11 Top view;

[0056] Figure 14 for Figure 13A cross-sectional view along the EE direction;

[0057] Explanation of reference numerals in the attached figures:

[0058] 10. Air intake and noise reduction structure;

[0059] 11. Air inlet panel; 111. Air inlet; 112. Noise reduction channel; 1121. Noise reduction hole; 11210. First noise reduction hole; 1122. Airflow guide channel; 11221. Airflow guide surface; 113. Divider beam;

[0060] 12. Air outlet panel; 121. Air outlet;

[0061] 13. Sound-absorbing structure;

[0062] 20. Smoke hood module; 21. Smoke hood; 211. Main air inlet of the smoke hood; 22. Fan module; 221. Smoke hood volute; 222. Smoke hood impeller; 223. Smoke hood exhaust pipe;

[0063] 30. Air conditioning module;

[0064] 31. Air conditioner air inlet / outlet panel; 311. Air conditioner air inlet; 3111. Second noise reduction vent; 312. Air conditioner air outlet; 313. Range hood air outlet;

[0065] 32. Air conditioner compressor;

[0066] 33. Air conditioner condenser;

[0067] 34. Air conditioner evaporator. Detailed Implementation

[0068] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0070] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0071] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0072] The kitchen is the main place where people cook, and the quality of the kitchen air environment directly affects people's cooking experience. During cooking, the kitchen is filled with heat, fumes, and grease, polluting the environment. Especially in the hot summer, the kitchen becomes like a sauna, with high temperature and humidity, greatly affecting people's mood while cooking. Therefore, air-conditioning range hoods have emerged to address this issue. Air-conditioning range hoods can effectively reduce the temperature around people during cooking, creating a more comfortable kitchen environment for users.

[0073] However, compared to ordinary range hoods, air-conditioning range hoods have additional fans for both the evaporator and condenser, resulting in higher overall noise levels. Furthermore, the air intake and exhaust of the air conditioning unit also affects the range hood's smoke extraction efficiency; to ensure effective smoke extraction, the range hood needs a sufficient air intake area. The cooling effect of the air conditioning unit is also related to its air intake area. A significant portion of the noise from air-conditioning range hoods radiates outwards through both the range hood's air inlet and the air conditioning unit's air inlet; the larger the air intake area, the louder the noise.

[0074] To ensure that the air conditioner range hood has a good smoke extraction and cooling effect, it needs a sufficient air intake area. However, the larger the air intake area, the greater the noise radiated from the air intake. Therefore, how to provide an air intake structure that can effectively ensure the size of the air intake area of ​​the air conditioner range hood while also reducing noise is a problem that those skilled in the art urgently need to solve.

[0075] To address the above problems, this invention provides an air intake noise reduction structure and an air conditioning range hood. By improving the air intake of the range hood and the air conditioning intake, noise reduction is achieved while ensuring the air intake area.

[0076] The following is combined Figures 1 to 14 The following describes embodiments of the present invention.

[0077] According to an embodiment of the present invention, in one aspect, the present invention provides an air intake noise reduction structure 10, such as... Figures 1 to 7As shown, the air intake noise reduction structure 10 includes an air intake plate 11 and a noise reduction channel 112. The air intake plate 11 is provided with an air inlet 111. The noise reduction channel 112 is disposed inside the air inlet 111. The noise reduction channel 112 includes a noise reduction hole 1121 opened inside the air intake plate 11 and a guide channel 1122 connecting the noise reduction hole 1121 and the air inlet 111. The guide channel 1122 has a guide surface 11221 suitable for guiding the airflow entering from the air inlet 111 and / or guiding the sound waves to the noise reduction hole 1121.

[0078] In the above embodiment, without changing the size of the air inlet 111, the noise reduction channel 112 provided on the inner periphery of the air inlet 111, specifically, the guide channel 1122 and the guide surface 11221 provided on the inner peripheral wall of the air inlet 111 to guide the airflow to bifurcate and flow in all directions, can guide the airflow and sound waves entering from the air inlet 111 to the tiny and narrow noise reduction hole 1121 in the air inlet plate 11. The tiny and narrow noise reduction hole 1121 is used to reflect the noise at the air inlet 111 multiple times to consume the sound wave energy, thereby achieving the purpose of noise reduction. This achieves the goal of noise reduction without affecting the air intake area and the purpose of noise reduction, effectively solving the problem in the prior art that it is difficult to achieve both the air intake area and noise reduction in air conditioning range hoods.

[0079] In some embodiments, the flow channel 1122 includes a flow guide section, the cross-sectional area of ​​which gradually increases from the air inlet 111 toward the noise reduction hole 1121; the flow guide surface 11221 is configured as an inclined plane or arc surface on the windward side of the air inlet 111, which is suitable for guiding the airflow toward the noise reduction hole 1121.

[0080] In the above embodiment, by setting a guide section with a cross-sectional area that gradually increases from the air inlet 111 towards the noise reduction hole 1121, and setting the guide surface 11221 as an inclined plane or arc surface on the windward side of the air inlet 111, the guide surface 11221 can meet part of the airflow entering from the air inlet 111, and change the flow direction of this part of the airflow from the original axial direction along the air inlet 111 to a direction at a set angle with the central axis of the air inlet 111, that is, guide it into the noise reduction hole 1121. The sound waves are continuously consumed in the noise reduction hole 1121, thereby achieving noise reduction. In addition, by setting the guide surface 11221 of the guide channel 1122 as an inclined straight surface or arc surface, instead of using a right-angle bend, it can be effectively ensured that at least part of the airflow and sound waves can enter the guide channel 1122 that branches out in all directions when the gas enters the air inlet 111.

[0081] Specifically, the guide section has an inlet end and an outlet end, wherein the cross-sectional area of ​​the outlet end is larger than that of the inlet end. The inlet end is connected to the air inlet 111 and is located near the air inlet side of the air inlet 111. The outlet end is connected to the noise reduction hole 1121. The guide surface 11221 connects the inlet end and the outlet end, and the distance between the guide surface 11221 and the noise reduction hole 1121 gradually increases along the air inlet direction of the air inlet 111. When the air comes in, it enters the guide channel 1122 from the inlet end and flows into the noise reduction hole 1121 along the guide surface 11221 of the guide channel 1122.

[0082] In some embodiments, the outlet end of the flow guide section is directly connected to the inlet end of the noise reduction hole 1121. Alternatively, in other alternative embodiments, the flow guide channel 1122 may also include a flow storage section with a constant inner diameter, which is connected between the flow guide section and the noise reduction hole 1121. The flow storage section can increase the flow rate of the flow guide channel 1122.

[0083] In some embodiments, such as Figure 3 , Figures 5 to 7 As shown, the air inlet plate 11 has multiple layers of noise reduction holes 1121. Each layer of noise reduction holes 1121 includes multiple first noise reduction holes 11210, and adjacent layers of noise reduction holes 1121 are arranged alternately.

[0084] In the above embodiments, by providing multiple layers of noise reduction holes 1121 and multiple first noise reduction holes 11210 in each layer, the noise reduction effect can be further improved without affecting the air intake volume.

[0085] In some preferred embodiments, the noise reduction hole 1121 includes three layers of staggered first noise reduction holes 11210 disposed in the air inlet plate 11.

[0086] In some embodiments, the air inlet 111 is a strip-shaped inlet, and a strip-shaped flow channel 1122 is provided on at least one side wall of the strip-shaped inlet. A plurality of first noise reduction holes 11210 located on the side wall are respectively connected to the flow channel 1122. One flow channel 1122 corresponds to a plurality of first noise reduction holes 11210 on the same side, simplifying the structure.

[0087] In some modified embodiments, the air inlet 111 is a circular hole, and an annular flow channel 1122 is provided on the inner peripheral wall of the air inlet 111. A plurality of first noise reduction holes 11210 are provided at intervals on the inner peripheral wall of the air inlet 111, and the plurality of first noise reduction holes 11210 are respectively connected to the annular flow channel 1122.

[0088] In some embodiments, the diameter of the first noise reduction hole 11210 is 2mm to 5mm, and the hole spacing is 6mm to 14mm. Preferably, the hole spacing is 8mm to 12mm.

[0089] In the above embodiments, by designing the aperture and spacing of the holes, the structural strength of the air inlet plate 11 is ensured while the aperture of the first noise reduction holes 11210 is smaller, the arrangement is more compact, and the number is greater, thereby achieving a better noise reduction effect.

[0090] In some embodiments, one end of the noise reduction hole 1121 is connected to the air guide channel 1122, and the other end extends to the edge of the air inlet plate 11.

[0091] In the above embodiment, by extending the end of the noise reduction hole 1121 to a position close to the edge of the air inlet plate 11, the first noise reduction hole 11210 is made longer, and the sound waves can be reflected multiple times inside it and the energy is continuously consumed, thereby further improving the noise reduction effect.

[0092] In some more specific embodiments, the noise reduction hole 1121 extends in a direction parallel to the plane where the air inlet plate 11 is located.

[0093] In some embodiments, such as Figure 1 , Figure 2 As shown, the air intake noise reduction structure 10 also includes an air outlet plate 12 and a sound absorption structure 13. The air outlet plate 12 is adapted to be connected and cooperate with the air intake plate 11 to form an air intake cavity. An air outlet 121 is provided on the air outlet plate 12. The sound absorption structure 13 is set in the air intake cavity. The airflow enters the air intake cavity through the air inlet 111, is reduced by the noise reduction channel 112, and then enters the air intake cavity. After flowing through the sound absorption structure 13, it is discharged from the air outlet 121.

[0094] In the above embodiment, the sound-absorbing structure 13 provided between the air inlet plate 11 and the air outlet plate 12 absorbs the noise generated in the air inlet cavity due to the air flow or airflow colliding with the air inlet plate 11 and the air outlet plate 12, thereby achieving the purpose of sound absorption and further realizing noise reduction.

[0095] Optionally, the air inlet plate 11 and the air outlet plate 12 are interlocked, and at least one of the air inlet plate 11 and the air outlet plate 12 is a hollow shell structure with an opening on one side, so that they can be enclosed to form a closed air inlet cavity after being interlocked.

[0096] Preferably, the air inlet plate 11 and the air outlet plate 12 are snapped together and fixed. Of course, the air inlet plate 11 and the air outlet plate 12 can also be connected by screws.

[0097] In some embodiments of this example, the sound-absorbing structure 13 is sound-absorbing cotton.

[0098] In other alternative embodiments, the sound-absorbing structure 13 may be a sound-absorbing and sound-insulating composite structure or a sound-absorbing panel made of sound-absorbing material, and this embodiment does not limit this.

[0099] Preferably, in this embodiment, the sound-absorbing structure 13 is made of sound-insulating cotton, which is pasted inside the air inlet cavity. The sound-absorbing structure 13 is made of sound-insulating cotton, which not only has good sound insulation and sound absorption effects, but also has low cost and light weight.

[0100] In some embodiments, along the width direction of the air inlet plate 11, the air inlet plate 11 includes a central region located in the middle and two side regions distributed on both sides of the central region. The air inlet 111 is opened in the central region of the air inlet plate 11, and the air outlet 121 is opened in the central region of the air outlet plate 12 along the width direction. The sound absorption structure 13 includes two sets of sound-absorbing cotton disposed in the air inlet cavity, and the two sets of sound-absorbing cotton respectively correspond to the two side regions of the air inlet plate 11.

[0101] In the above embodiment, noise reduction is further achieved by setting sound insulation cotton between the air inlet plate 11 and the air outlet plate 12, and a certain smoke-absorbing effect is ensured. In addition, the two sets of sound-absorbing cotton are respectively set on the two sides of the air inlet plate 11, avoiding the air inlet 111 and the air outlet 121, thereby forming an air passage in the middle of the air inlet cavity that is connected to the air inlet 111 and the air outlet 121 respectively, without interfering with the normal flow of airflow, and avoiding the setting of sound-absorbing cotton from affecting the amount of air in and out.

[0102] In this embodiment, the sound-absorbing cotton is a strip-shaped cotton structure with a length consistent with the length direction of the air inlet plate 11. Two sound-absorbing cotton strips are set on both sides of the air passage. When the airflow passes through, the sound-absorbing cotton can play a noise reduction role. Moreover, the sound-absorbing cotton can not only reduce the noise of the airflow, but also reduce the noise radiated outward from the volute inside the fan.

[0103] In some embodiments, the air inlet plate 11 is provided with two sets of air inlets 111 spaced apart along the length direction; the air outlet 121 is opened at the middle position of the air outlet plate 12 along the length direction and is located between the two sets of air inlets 111.

[0104] In the above embodiment, the air intake area can be increased by opening two sets of air inlets 111 on the air intake plate 11, and the air outlet 121 set between the two sets of air inlets 111 can enable the air outlet plate 12 to gather the air intake plate 11 and guide it to the front of the smoke hood fan.

[0105] In some embodiments, each group of air inlets 111 includes two air inlets 111 spaced apart along the width direction of the air inlet plate 11, and adjacent two air inlets 111 are separated by a partition beam 113. The air inlet 111 is a strip-shaped hole extending along the length direction of the air inlet plate 11.

[0106] In some embodiments, the air outlet 121 is a plurality of grille holes spaced apart in the middle region of the air outlet 12 along the length direction of the air outlet 12.

[0107] In this embodiment, the air inlet plate 11 presents four air inlets 111 to the outside, and its interior actually has two air inlet channels on the left and right. The two air inlet channels are symmetrical on the left and right. The right air inlet channel will be used as an example for explanation below.

[0108] like Figures 4 to 6 As shown, branched guide channels 1122 are provided on the three sides (upper, lower, and right) of the right air intake channel of the air intake plate 11, and multiple noise reduction holes are provided at the end of each guide channel 1122. Correspondingly, branched guide channels 1122 are provided on the three sides (upper, lower, and left) of the left air intake channel, and multiple noise reduction holes are provided at the end of each guide channel 1122.

[0109] According to an embodiment of the present invention, in another aspect, an air conditioning range hood is provided, such as... Figures 1 to 14 As shown, the air conditioner range hood includes a smoke collection hood 21, a main air inlet 211, and an air intake noise reduction structure 10 of any of the above embodiments. The air intake noise reduction structure 10 is installed on the smoke collection hood 21 located above the main air inlet 211 of the range hood, and the air inlet 111 of the air intake noise reduction structure 10 serves as an auxiliary air inlet of the range hood.

[0110] In this embodiment, the main air inlet 211 of the range hood is the main air inlet of the air conditioner range hood. In order to ensure the smoke extraction effect of the range hood, an auxiliary air inlet of the range hood is set as a secondary air inlet to increase the air intake area of ​​the range hood. The auxiliary air inlet of the range hood is mainly used to further enhance the smoke extraction effect of the air conditioner range hood. By setting the above-mentioned air intake noise reduction structure 10 on the smoke collection hood 21, the air inlet 111 of the air intake noise reduction structure 10 is used as the auxiliary air inlet of the range hood. It can ensure the air intake area while achieving noise reduction. The noise reduction effect at the air inlet 111 of the range hood has been tested to be at least 0.5dB. Thus, while effectively ensuring the smoke extraction and cooling effect of the air conditioner range hood, a relatively ideal noise reduction effect can also be achieved.

[0111] Furthermore, in this embodiment, the aforementioned air intake noise reduction structure 10, installed at the secondary air inlet of the range hood, can effectively absorb the noise generated by the flow of oil fumes or their collision with the wall panel, and also absorb some of the fan operating noise transmitted from the range hood, thereby achieving the purpose of sound absorption, further reducing noise, and ensuring the smoke extraction effect of the air conditioning range hood.

[0112] In some embodiments, such as Figures 9 to 14 As shown, the air conditioning range hood also includes a range hood module 20 and an air conditioning module 30. The range hood module 20 includes a smoke collection hood 21 and a fan module 22 disposed above the smoke collection hood 21. The air conditioning module 30 is disposed above the range hood module 20. The top of the air conditioning module 30 is provided with an air conditioning inlet 311. The inner circumference of the air conditioning inlet 311 is provided with a plurality of second noise reduction holes 3111 spaced apart.

[0113] In this embodiment, the air-conditioning range hood consists of two parts: an air conditioning module 30 and a range hood module 20. The range hood module 20 has two air inlets: a main air inlet 211 and an auxiliary air inlet (i.e., the air inlet 111 of the air intake noise reduction structure 10). Both the auxiliary air inlet and the main air inlet 211 are located on the smoke collection hood 21, with the auxiliary air inlet positioned above the main air inlet 211. The air conditioning air inlet 311 is located at the top of the entire unit. In this embodiment, the main air inlet 211 below the range hood is the main air intake opening for the air-conditioning range hood, while the air inlet 111 of the upper air intake plate 11 is the secondary air inlet for the air-conditioning range hood. The secondary air inlet is mainly used to further enhance the smoke extraction effect of the air-conditioning range hood.

[0114] like Figure 9 and Figure 10 As shown, the air ducts between the air conditioning module 30 and the range hood module 20 are interconnected. The hot air from the air conditioning condenser 33 is discharged into the range hood's air handling unit, which affects the range hood's smoke extraction efficiency. Therefore, to ensure the range hood's smoke extraction efficiency, an upper air inlet 111 is provided as an auxiliary air inlet to increase the range hood's air intake area.

[0115] As the air intake area of ​​the range hood increases, the noise radiated by the range hood will also increase accordingly. Therefore, a corresponding air intake noise reduction structure 10 is designed at the auxiliary air inlet of the range hood, specifically as follows: Figure 1 , Figure 2 , Figure 10 As shown, it consists of an outer air inlet plate 11 and an inner air outlet plate 12. Smoke enters through the four air inlets 111 of the outer air inlet plate 11 and converges at the air outlet 121 in the middle of the air outlet plate 12, directly in front of the range hood fan, and is finally drawn in by the fan module 22. Sound-absorbing cotton is pasted between the air inlet plate 11 and the air outlet plate 12 to reduce noise from the air inlet 111 and the noise radiated outwards by the range hood fan.

[0116] This embodiment achieves further noise reduction without affecting the cooling effect by setting a second noise reduction hole 3111 inside the air conditioner air inlet 311.

[0117] In some embodiments, the second noise reduction aperture 3111 has two or more layers.

[0118] Optionally, the second noise reduction hole 3111 has two layers.

[0119] In some embodiments, the air conditioning module 30 includes an air conditioning inlet / outlet panel 31 disposed on the top of the unit; the air conditioning inlet 311 includes a plurality of grille holes spaced apart on the air conditioning inlet / outlet panel 31, and each grille hole has a plurality of second noise reduction holes 3111 disposed on its inner periphery.

[0120] In the above embodiment, the air conditioner air inlet and outlet panel 31 is located on the top of the air conditioner range hood. Through a number of grille holes opened in the air conditioner air inlet and outlet panel 31, and multiple noise reduction micro-holes set in each grille hole, a noise reduction structure for the air conditioner air inlet of the air conditioner range hood is formed.

[0121] like Figure 11 , Figure 12 and Figure 14 As shown, by employing a large number of small-area strip-shaped grille holes, each through-hole, though small in area, has a large number, ensuring sufficient air intake area for the air conditioner. Two layers of noise-reducing micropores are also set inside each through-hole, further reducing noise without affecting the cooling effect.

[0122] In this embodiment, the noise reduction effect of changing the air conditioner air inlet 311 from a large grille to a small grille is 0.6dB, while not affecting the air conditioning air volume.

[0123] In some embodiments, the air conditioner air inlet and outlet panel 31 is also provided with an air conditioner air outlet 312 and a range hood air outlet 313.

[0124] Furthermore, the fan module 22 includes a volute 221, a fan impeller 222 disposed within the volute 221, and a fan exhaust pipe 223 connecting the volute 221 and the fan outlet 313.

[0125] Furthermore, the air conditioning module 30 includes an air conditioning compressor 32, an air conditioning condenser 33, and an air conditioning evaporator 34 disposed in a cavity above the range hood casing 221. The air conditioning evaporator 34 is connected to the air conditioning outlet 312.

[0126] The air conditioner range hood provided in this embodiment has the following two main improvements:

[0127] 1. This invention designs an air intake noise reduction structure 10 for the auxiliary air inlet of an air conditioning range hood, which consists of two parts: an outer grille air inlet plate 11 and an inner grille air outlet plate 12. The air inlet 111 on the outer grille air inlet plate 11 serves as the auxiliary air inlet for the range hood. Without changing the size of the air inlet 111, a guide channel 1122 is provided on the side of the air inlet 111 to achieve airflow branching. The guide channel 1122 utilizes its internal small and narrow first noise reduction holes 11210 to perform multiple reflections of the noise from the air inlet 111, thereby consuming sound wave energy and achieving noise reduction. The function of the inner grille air outlet plate 12 is to gather the airflow drawn in by the outer grille air inlet plate 11 and direct it to the front of the range hood fan. Further noise reduction is achieved by attaching sound insulation cotton between the outer grille air inlet plate 11 and the inner grille air outlet plate 12, while ensuring a certain level of smoke extraction effect.

[0128] 2. The present invention designs a noise reduction structure at the air inlet 311 of the air conditioner, which adopts a large number of long strip grilles with small area, and sets noise reduction micro-holes inside each grille hole to achieve noise reduction without affecting the cooling effect.

[0129] The air conditioning range hood provided by this invention incorporates noise reduction structures at both the auxiliary air inlet and the air conditioning inlet 311. These structures ensure sufficient air intake area while reducing noise, thus maintaining both smoke extraction and cooling effects. Experimental testing has shown that the noise reduction at the auxiliary air inlet is at least 0.5 dB. The noise reduction at the air conditioning inlet 311, after being modified from a large grille to several smaller grilles and incorporating a second noise reduction hole 3111, is 0.6 dB, without affecting the air conditioning airflow.

[0130] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An air intake noise reduction structure, characterized in that, include: An air inlet plate (11) is provided with an air inlet (111). The noise reduction channel (112) is disposed inside the air inlet (111). The noise reduction channel (112) includes a noise reduction hole (1121) opened inside the air inlet plate (11) and a guide channel (1122) connecting the noise reduction hole (1121) and the air inlet (111). The flow channel (1122) has a flow guide surface (11221) suitable for guiding the airflow entering from the air inlet (111) and / or guiding the sound waves to the noise reduction hole (1121). One end of the noise reduction hole (1121) is connected to the flow channel (1122), and the other end extends to the edge of the air inlet plate (11).

2. The air intake noise reduction structure according to claim 1, characterized in that, The flow channel (1122) includes a flow guide section, the cross-sectional area of ​​which gradually increases from the air inlet (111) toward the noise reduction hole (1121); The guide surface (11221) is set as an inclined plane or arc surface on the windward side of the air inlet (111), which is suitable for guiding the airflow to flow in the direction of the noise reduction hole (1121).

3. The air intake noise reduction structure according to claim 1, characterized in that, The air inlet plate (11) is provided with multiple layers of noise reduction holes (1121). Each layer of the noise reduction aperture (1121) includes a plurality of first noise reduction apertures (11210), and the noise reduction apertures (1121) of adjacent layers are arranged alternately.

4. The air intake noise reduction structure according to any one of claims 1 to 3, characterized in that, The air intake noise reduction structure (10) also includes: An air outlet plate (12) is provided, which is adapted to be connected and cooperate with the air inlet plate (11) to form an air inlet cavity. An air outlet (121) is provided on the air outlet plate (12). The sound-absorbing structure (13) is disposed in the air inlet cavity. The airflow enters the air inlet cavity after being reduced by the noise reduction channel (112) after entering the air inlet cavity through the air inlet (111), and is discharged from the air outlet (121) after flowing through the sound-absorbing structure (13).

5. The air intake noise reduction structure according to claim 4, characterized in that, Along the width direction of the air inlet plate (11), the air inlet plate (11) includes a central region located in the middle and two side regions distributed on both sides of the central region. The air inlet (111) is opened in the central region of the air inlet plate (11), and the air outlet (121) is opened in the central region of the air outlet plate (12) along the width direction. The sound-absorbing structure (13) includes two sets of sound-absorbing cotton disposed in the air inlet cavity, and the two sets of sound-absorbing cotton respectively correspond to the two side areas of the air inlet plate (11).

6. The air intake noise reduction structure according to claim 4, characterized in that, The air inlet plate (11) has two sets of air inlets (111) spaced apart along its length. The air outlet (121) is located at the middle position along the length of the air outlet plate (12) and between the two sets of air inlets (111).

7. An air conditioning range hood, characterized in that, include: Smoke hood (21); The main air inlet (211) of the smoke hood is located on the smoke collection hood (21); The air intake noise reduction structure (10) according to any one of claims 1 to 6 is installed on the smoke collection hood (21) located above the main air inlet (211) of the smoke machine, and the air inlet (111) of the air intake noise reduction structure (10) serves as the auxiliary air inlet of the smoke machine.

8. The air conditioner range hood according to claim 7, characterized in that, The air conditioning range hood also includes: The smoke hood module (20) includes the smoke collection hood (21) and a fan module (22) disposed above the smoke collection hood (21). An air conditioning module (30) is disposed above the range hood module (20). The top of the air conditioning module (30) is provided with an air conditioning inlet (311). The inner circumference of the air conditioning inlet (311) is provided with a plurality of second noise reduction holes (3111).

9. The air conditioner range hood according to claim 8, characterized in that, The second noise reduction hole (3111) has two or more layers.

10. The air conditioner range hood according to claim 8 or 9, characterized in that, The air conditioning module (30) includes an air conditioning inlet and outlet panel (31) located on the top of the unit. The air conditioning inlet (311) includes a number of grille holes spaced apart on the air conditioning inlet and outlet panel (31), and each grille hole has a number of second noise reduction holes (3111) on its inner periphery.

11. The air conditioner range hood according to claim 10, characterized in that, The air conditioner air inlet and outlet panel (31) is also provided with an air conditioner air outlet (312) and a range hood air outlet (313).

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