Noise reduction type range hood

Abstract

The invention belongs to the technical field of shock absorption and noise reduction of smoke exhaust ventilators, and discloses a noise reduction type smoke exhaust ventilator which comprises a smoke exhaust ventilator body and a flue arranged on the smoke exhaust ventilator body in a communicating mode, the smoke exhaust ventilator body is assembled on a mounting plate, and the noise reduction type smoke exhaust ventilator further comprises an exhaust fan arranged in the flue; the bottom of the exhaust fan is fixedly mounted on the mounting plate through a damping mounting assembly; wherein the damping mounting assembly comprises a fixing rod assembled on the mounting plate and a long cantilever fixedly connected with the exhaust fan and used for supporting the exhaust fan, and the top end of the exhaust fan is connected with the flue through a flexible connecting piece and a detachable rigid connecting piece. According to the range hood, the exhaust fan and the flue are assembled and isolated, so that vibration of the exhaust fan can only be transmitted to the damping mounting assembly, vibration energy is eliminated through a damping element on the damping mounting assembly and cannot be transmitted to the range hood body and the flue to cause resonance of the whole range hood body, noise generation can be greatly reduced, and vibration and mechanical abrasion can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of vibration reduction and noise reduction of range hoods, in particular to a noise reduction range hood. Background Art

[0002] The range hood is a commonly used household kitchen appliance, which is used to extract smoke generated during cooking and prevent the smoke from spreading into the room. In the existing range hood, after the main smoke extraction part of the range hood is installed on the fixed plate on the wall, the negative pressure fan part above it is also assembled to the main body of the range hood. That is, the internal smoke extraction negative pressure fan is integrated and installed on the main body of the range hood. This will bring an obvious defect. The mechanical vibration of the fan during operation will be directly transmitted to the fan through the connecting parts. The fan usually generates large vibrations when working, which is one of the main sources of noise. In addition, the looseness of the connecting parts of the range hood that has been used for a long time will also aggravate the vibration amplitude. The vibration of the range hood can be directly seen by visual observation, and the noise is even louder.

[0003] Therefore, the present application proposes a new modular installation method to isolate the mechanical vibration from the smoke extractor body, reduce the amplitude and noise, etc., and overcome the above-mentioned defects. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a noise reduction range hood.

[0005] To achieve the above object, the present invention provides the following technical solution: a noise reduction range hood, comprising a range hood body and a flue connected and arranged on the range hood body, the range hood body being assembled on a mounting plate, and further comprising an exhaust fan arranged in the flue, the bottom of the exhaust fan being fixedly mounted on the mounting plate through a shock-absorbing mounting assembly; Wherein, the shock-absorbing mounting assembly comprises a fixing rod mounted on the mounting plate and a long cantilever fixedly connected to the exhaust fan and supporting it; The top of the exhaust fan is connected to the flue through a flexible connector and a detachable rigid connector, the shock-absorbing mounting assembly passes through the flue to the inside thereof and is connected to the exhaust fan, and the shock-absorbing mounting assembly and the flue are flexibly connected; The rigid connection piece between the exhaust fan and the flue is a rigid connection assembly, which includes a fixed block installed on the flue, a bracket arranged on the smoke exhaust pipe, and a lifting ear installed on the bracket, and the fixed block and the lifting ear are fixedly connected.

[0006] The flexible connection between the exhaust fan and the flue is an isolation component 2, which includes a mounting ring mounted on the flue, a fixing ring fixed on the peripheral surface of the smoke exhaust pipe, and an isolation cloth 2 connected between the mounting ring and the fixing ring; The isolation component 2 is used to isolate the internal and external environments of the flue.

[0007] The shock-absorbing mounting assembly further comprises a short cantilever arranged below the fixing rod, an air damping rod being hingedly mounted on the short cantilever and an output end of the air damping rod being hingedly connected to the end of the long cantilever; The short cantilever is also connected to the fixed rod through an oblique support rod.

[0008] Preferably, a clamp is fixedly mounted on the back of the fixing rod, and the mounting plate comprises a back plate mounted on the wall and a clamping sleeve fixed on the back plate; The clamping piece is vertically clamped in the clamping sleeve.

[0009] Preferably, the clamp is hollow from top to bottom, and the interior of the clamp is provided with ribs to support the panel of the clamp so that the clamp is deformed inwardly; A plurality of ribs are provided, and the cross-sectional length gradually decreases from the middle to both sides.

[0010] Preferably, the flexible connection between the shock-absorbing mounting assembly and the flue is completed through an isolation assembly 1, the isolation assembly 1 includes a guard plate and an isolation cloth 1, the long cantilever, the short cantilever and the diagonal brace all pass through the guard plate and are fixedly connected thereto, the isolation cloth 1 is fixedly attached to the flue and glued to the edge of the guard plate, There is a clearance fit between the guard plate and the flue.

[0011] Preferably, the isolation component 1 also includes a rubber spacer arranged on the flue, and the rubber spacer forms a rectangle with a closed loop from beginning to end and is in press-fit contact with the extension of the guard plate.

[0012] Preferably, the hinges between the air damping rod and the long cantilever and the short cantilever can be replaced by universal joints.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention separates the exhaust fan from the range hood body and sets them in the flue. The exhaust fan is installed through a shock-absorbing mounting assembly and a mounting plate, rather than being directly rigidly connected to the flue. This installation method isolates the exhaust fan from the flue, so the vibration of the exhaust fan can only be transmitted to the shock-absorbing mounting assembly. The vibration energy is dissipated by the shock-absorbing element on the shock-absorbing mounting assembly and will not be transmitted to the range hood body and the flue to cause resonance of the entire range hood body, which can greatly reduce noise generation, vibration and mechanical wear.

[0014] The present invention adopts the isolation component 1 and the isolation component 2 to flexibly connect the flue, the exhaust fan and the shock-absorbing mounting component, and abandons the use of the traditional rigid connection method. While blocking the transmission of vibration, it can also play the role of heat insulation and smoke isolation. Through the ductility of the isolation cloth, the mechanical vibration is offset by its own extension without affecting the flue connected thereto, so that the flue is almost not affected by the vibration through the isolation component 1 and the isolation component 2. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 A part of the enlarged schematic diagram; Figure 3 This is a top view of the range hood of the present invention; Figure 4 For the present invention Figure 3 A magnified schematic diagram of part B in FIG. Figure 5 For the present invention Figure 3 An enlarged schematic diagram of part C in FIG. Figure 6 It is a schematic diagram of the assembly of the exhaust fan and the shock-absorbing mounting assembly inside the flue of the present invention; Figure 7 It is a schematic diagram of the positional relationship between the isolation component 1 and the long cantilever, the segment cantilever and the diagonal brace of the present invention; Figure 8 It is a schematic diagram of the bottom structure of the shock-absorbing mounting assembly of the present invention; Fig. 9 For the present invention Figure 8 An enlarged schematic diagram of part D of FIG. Fig.10 It is a schematic diagram of the installation structure between the shock-absorbing installation assembly and the exhaust fan of the present invention.

[0016] In the figure: 100, range hood body; 200, flue; 300, exhaust fan; 301, exhaust pipe; 400, shock-absorbing installation assembly; 401, fixing rod; 402, long cantilever; 403, short cantilever; 404, air damping rod; 405, diagonal support rod; 406, clamp; 500, mounting plate; 501, back plate; 502, clamping sleeve; 5021, rib; 600, isolation assembly 1; 601, guard plate; 602, isolation cloth 1; 603, rubber spacer; 700, isolation assembly 2; 701, mounting ring; 702, isolation cloth 2; 703, fixing ring; 800, rigid connection assembly; 801, fixing block; 802, lifting ear; 803, tilting frame. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figures 1 to 10 As shown, the present invention provides a noise reduction range hood, comprising a range hood body (100) and a flue 200 arranged on the range hood body 100, the range hood body 100 being assembled on a mounting plate 500, and characterized in that: it also comprises an exhaust fan 300 arranged in the flue 200, the bottom of the exhaust fan 300 being fixedly mounted on the mounting plate 500 via a shock-absorbing mounting assembly 400; The shock-absorbing mounting assembly 400 includes a fixing rod 401 mounted on the mounting plate 500 and a long cantilever 402 fixedly connected to the exhaust fan 300 and supporting it; The top of the exhaust fan 300 is connected to the flue 200 via a flexible connector and a detachable rigid connector. The shock-absorbing mounting assembly 400 passes through the flue 200 to the inside thereof and is connected to the exhaust fan 300. The shock-absorbing mounting assembly 400 and the flue 200 are flexibly connected.

[0019] The exhaust fan 300 and the range hood body 100 are separated and arranged in the flue 200. The installation of the exhaust fan 300 is relatively isolated from the range hood body 100 and the flue 200. The exhaust fan 300 is mainly installed through the shock-absorbing mounting assembly 400 and the mounting plate 500 to maintain its stable posture and position in the flue 200, rather than being directly installed in the flue 200. This installation method plays a role in assembling and isolating the exhaust fan 300 from the flue 200. The exhaust fan 300 and the flue 200 are not in a rigid connection state during operation. Therefore, the vibration of the exhaust fan 300 can only be transmitted to the shock-absorbing mounting assembly 400. The vibration energy is dissipated by the shock-absorbing element on the shock-absorbing mounting assembly 400, and will not be transmitted to the range hood body 100 and the flue 200 to cause resonance of the entire range hood body, which can greatly reduce noise generation.

[0020] The two connection methods between the flue 200 and the exhaust fan 300 are not used all the time, but are for the convenience of the overall assembly of the range hood at the beginning. After the assembly is completed, the rigid connection between the flue 200 and the exhaust fan 300 is released and replaced with a flexible connection to block the vibration transmission path between the two.

[0021] The noise can be further reduced by installing silencer cotton on the four inner walls of the flue 200. A layer of aluminum foil is attached to the outer side of the silencer cotton to insulate and prevent oil pollution, thereby extending the service life.

[0022] like Figure 1 and Figure 2 As shown, the rigid connection member between the exhaust fan 300 and the flue 200 is a rigid connection assembly 800, which includes a fixed block 801 installed on the flue 200, a bracket 803 arranged on the exhaust pipe 301 and a lifting ear 802 installed on the bracket 803, and the fixed block 801 and the lifting ear 802 are fixedly connected.

[0023] The rigid connection assembly 800 is used to temporarily rigidly connect the exhaust fan 300 and the flue 200. In order to facilitate the installation of the flue 200 and the exhaust fan 300, the flue 200, the exhaust fan 300 and the shock-absorbing mounting assembly 400 are first formed into a whole through the rigid connection assembly 800 and installed on the range hood body 100. After the shock-absorbing mounting assembly 400 and the mounting plate 500 are installed, the rigid connection assembly 800 is disassembled to release the rigid connection state. The flexible connection between the flue 200 and the exhaust fan 300 plays a role in isolating the smoke inside the flue 200 and preventing it from overflowing. At the same time, it can block vibration to avoid the phenomenon of large-scale vibration causing loud noise.

[0024] like Figure 1-Figure 4 As shown, the flexible connection piece between the exhaust fan 300 and the flue 200 is an isolation assembly 2 700, and the isolation assembly 2 700 includes a mounting ring 701 mounted on the flue 200, a fixing ring 703 fixed on the circumference of the exhaust pipe 301, and an isolation cloth 2 702 connected between the mounting ring 701 and the fixing ring 703; The second isolation component 700 is used to isolate the internal and external environments of the flue 200 .

[0025] The second isolation component 700 connects the exhaust pipe 301 and the flue 200. When the exhaust pipe 301 vibrates, the vibration amplitude is absorbed by the second isolation component 700, so that it cannot affect the flue 200. When the exhaust pipe 301 vibrates, the vibration is offset by the ductility of the second isolation cloth 702. The second isolation cloth 702 is made of pleated cloth and aluminum foil. Double-sided aluminum foil sandwich cloth isolates smoke and heat.

[0026] like Figure 6 As shown, the shock-absorbing mounting assembly 400 further includes a short cantilever 403 disposed below the fixed rod 401, an air damping rod 404 is hingedly mounted on the short cantilever 403, and an output end of the air damping rod 404 is hingedly connected to the end of the long cantilever 402; The short cantilever 403 is also connected to the fixed rod 401 via a diagonal brace 405 .

[0027] The length of the short cantilever 403 is shorter than that of the long cantilever 402. The end of the short cantilever 403 extends into the inner cavity of the flue 200 for a short length, and the end amplitude is small. The short cantilever 403 and the long cantilever 402 are connected via an air damping rod 404. In order to firmly install the exhaust fan 300, the long cantilever 402 extends into the flue 200 for a long length, and the end amplitude is relatively large. The end of the long cantilever 402 is connected to the short cantilever 403 via the air damping rod 404, which greatly reduces the end amplitude of the long cantilever 402, greatly reduces the vibration, and thus reduces the vibration noise. The diagonal brace 405 is connected to the short cantilever 403 to enhance the connection rigidity of the diagonal brace 405.

[0028] like Figure 3 and Figure 5 As shown, a clamp 406 is fixedly mounted on the back of the fixing rod 401, and the mounting plate 500 includes a back plate 501 mounted on the wall and a clamping sleeve 502 fixedly mounted on the back plate 501; The clamping member 406 is vertically clamped in the clamping sleeve 502 .

[0029] The clamping piece 406 and the clamping sleeve 502 are used together to install the shock-absorbing mounting assembly 400. The installation process is very simple and only requires vertical clamping from top to bottom to complete the installation, and the installation effect is firm and reliable.

[0030] like Figure 3 and Figure 5 As shown, the clamp 406 is hollow from top to bottom, and the interior of the clamp sleeve 502 is provided with ribs 5021 to support the panel of the clamp 406 so that the clamp 406 is deformed inwardly; A plurality of ribs 5021 are provided, and the cross-sectional length gradually decreases from the middle to both sides.

[0031] The clamp 406 is made of polypropylene, which has excellent corrosion resistance and toughness. The clamp 406 is elastically deformed after being supported by the rib 5021, and the elastic deformation can provide a more secure clamping. The cross-sectional length of the rib 5021 gradually decreases from the middle to the sides to adapt to the panel deformation amplitude of the rib 5021, with a deeper depression in the middle and a shallower depression on the sides due to being close to the wing plate.

[0032] like Figure 7-Figure 9 As shown, the flexible connection between the shock-absorbing mounting assembly 400 and the flue 200 is completed by an isolation assembly 600, which includes a guard plate 601 and an isolation cloth 602. The long cantilever 402, the short cantilever 403 and the diagonal support rod 405 all pass through the guard plate 601 and are fixedly connected thereto. The isolation cloth 602 is fixedly attached to the flue 200 and glued to the edge of the guard plate 601. There is a clearance fit between the guard plate 601 and the flue 200 .

[0033] The guard plate 601 is fixedly connected to the long cantilever 402, the short cantilever 403 and the diagonal brace 405. Therefore, the vibration received by the shock-absorbing mounting assembly 400 will be transmitted to the isolation assembly 1 600. Therefore, the above scheme makes relevant adaptive design for the isolation assembly 1 600 to isolate the vibration here from the flue 200. The connection between the guard plate 601 and the flue 200 is designed as a soft connection mode, that is, the guard plate 601 is connected to the flue 200 through the isolation cloth 1 602, and the ductility of the isolation cloth 1 602 is used to provide a space for the guard plate 601 to vibrate slightly. The structure of the isolation cloth 1 602 is the same as that of the isolation cloth 2 702, and the isolation cloth 1 602 fully covers the opening of the flue 200 here, so as to isolate the internal and external environments of the flue 200. Through the above arrangement, the isolation assembly 1 600 can hardly affect the flue 200 when vibrating, and will not drive the flue 200 to vibrate, thereby greatly reducing the noise. At the same time, it can also play the effect of isolating and preventing smoke from escaping.

[0034] like Fig. 9 As shown, the isolation component 1 600 also includes a rubber spacer 603 arranged on the flue 200 , and the rubber spacer 603 forms a rectangular closed loop from beginning to end and is in press-fit contact with the extension of the guard plate 601 .

[0035] The rubber spacer 603 is placed between the guard plate 601 and the flue 200 to serve as an elastic buffer between the two when the guard plate 601 vibrates slightly, thereby preventing excessive noise and structural damage caused by a rigid collision between the two.

[0036] like Figure 6 As shown, the hinges between the air damper rod 404 and the long cantilever 402 and the short cantilever 403 can be replaced by universal joints.

[0037] The universal joint is used to replace the hinge, which is a preferred embodiment. Generally, the movable hinge can move in two horizontal directions. When used in this application, it can only achieve up and down shock absorption when combined with the air damping rod 404, but it is difficult to reduce vibration energy in multiple directions. However, after the universal joint connection is adopted, the air damping rod 404 can absorb vibration energy in all vibration directions, reduce the amplitude of the shock-absorbing mounting assembly 400 body, and further reduce noise. Therefore, it has obvious advantages that general movable hinges do not have.

[0038] The use of movable hinges and universal joints only results in two of the embodiments disclosed in this application. Technical personnel in the relevant field can still adopt appropriate connection mechanisms based on actual conditions, starting from the cost, benefits of the solution or unique vibration direction, etc., but they are all reasonable and predictable expansions based on the solution of this application.

[0039] The working principle and use process of the present invention: The range hood body 100 is mounted on the mounting plate 500, the flue 200 is mounted on the range hood body 100, and the exhaust fan 300 is mounted on the mounting plate 500 through the shock-absorbing mounting assembly 400, so that the exhaust fan 300 and the range hood body 100 are installed in isolation, and a flexible connection assembly is used between the exhaust fan 300 and the flue 200 to realize the isolated assembly of the flue 200 and the exhaust fan 300. The mechanical vibration generated by the exhaust fan 300 cannot be transmitted to the range hood body 100 and the flue 200, thereby reducing the resonance range and the vibration amplitude.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A noise reduction range hood, comprising a range hood body (100) and a flue (200) arranged in communication with the range hood body (100), wherein the range hood body (100) is mounted on a mounting plate (500), and characterized in that: It also includes an exhaust fan (300) disposed in the flue (200), wherein the bottom of the exhaust fan (300) is fixedly mounted on the mounting plate (500) via a shock-absorbing mounting assembly (400); The shock-absorbing mounting assembly (400) comprises a fixing rod (401) mounted on the mounting plate (500) and a long cantilever (402) fixedly connected to the exhaust fan (300) and supporting it; The top end of the exhaust fan (300) is connected to the flue (200) via a flexible connector and a detachable rigid connector, the shock-absorbing mounting assembly (400) passes through the flue (200) to the inside thereof and is connected to the exhaust fan (300), and the shock-absorbing mounting assembly (400) and the flue (200) are flexibly connected; The rigid connection member between the exhaust fan (300) and the flue (200) is a rigid connection assembly (800), the rigid connection assembly (800) comprising a fixing block (801) mounted on the flue (200), a tilting bracket (803) disposed on the smoke exhaust pipe (301), and a lifting ear (802) mounted on the tilting bracket (803), the fixing block (801) and the lifting ear (802) being fixedly connected; The flexible connection piece between the exhaust fan (300) and the flue (200) is a second isolation component (700), and the second isolation component (700) comprises a mounting ring (701) mounted on the flue (200), a fixing ring (703) fixed on the circumference of the smoke exhaust pipe (301), and a second isolation cloth (702) connected between the mounting ring (701) and the fixing ring (703); The second isolation component (700) is used to isolate the internal and external environments of the flue (200); The shock-absorbing mounting assembly (400) further comprises a short cantilever (403) arranged below the fixing rod (401), an air damping rod (404) being hingedly mounted on the short cantilever (403), and an output end of the air damping rod (404) being hingedly connected to an end of the long cantilever (402); The short cantilever (403) is also connected to the fixed rod (401) via an oblique support rod (405).

2. A noise reduction range hood according to claim 1, characterized in that: A clamping member (406) is fixedly mounted on the back of the fixing rod (401), and the mounting plate (500) comprises a back plate (501) mounted on the wall and a clamping sleeve (502) fixedly mounted on the back plate (501); The clamping member (406) is vertically clamped in the clamping sleeve (502).

3. A noise reduction range hood according to claim 2, characterized in that: The clamping member (406) is hollow and penetrates from top to bottom, and a rib (5021) is provided inside the clamping sleeve (502) to support the panel of the clamping member (406) so that the clamping member (406) is deformed inwardly; A plurality of ribs (5021) are provided, and the cross-sectional length gradually decreases from the middle to both sides.

4. A noise reduction range hood according to claim 2, characterized in that: The flexible connection between the shock-absorbing mounting assembly (400) and the flue (200) is completed through an isolation assembly (600), wherein the isolation assembly (600) comprises a guard plate (601) and an isolation cloth (602), wherein the long cantilever (402), the short cantilever (403) and the diagonal brace (405) all pass through the guard plate (601) and are fixedly connected thereto, and the isolation cloth (602) is fixedly attached to the flue (200) and glued to the edge of the guard plate (601). There is a clearance fit between the guard plate (601) and the flue (200).

5. A noise reduction range hood according to claim 4, characterized in that: The isolation component 1 (600) further comprises a rubber spacer (603) arranged on the flue (200), wherein the rubber spacer (603) forms a rectangular closed loop from beginning to end and is in press-fit contact with the extension of the guard plate (601).

6. The noise reduction range hood according to claim 1, characterized in that: The hinges between the air damping rod (404) and the long cantilever (402) and the short cantilever (403) can be replaced by universal joints.

Images