Range hood

Abstract

The utility model relates to the technical field of range hoods, in particular to a range hood, which comprises a mainframe box and a fan arranged in the mainframe box, and the fan comprises a fan shell, a motor mounted on the fan shell and an impeller in transmission connection with the motor. The range hood further comprises a telescopic supporting piece, one end of the supporting piece is connected with the mainframe box, and the other end of the supporting piece is connected with the fan shell. The supporting piece is supported between the fan shell and the mainframe box, the structural strength of the fan shell and the mainframe box can be enhanced at the same time, and when vibration generated by the fan is transmitted to the fan shell and the mainframe box, the supporting piece can stretch out and draw back and generate damping force so as to buffer the vibration of the fan shell and the mainframe box; and thus, abnormal sound is avoided or reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a range hood. Background Art

[0002] During the operation of the range hood, different degrees of "abnormal noise" may occur according to the actual use environment and the assembly relationship of the machine parts. The so-called "abnormal noise" is relative to the inevitable "basic noise" that exists in any machine. In essence, it is not necessarily caused by the inherent excitation source inside the machine. Most of the time, it is caused by some kind of fault inside the machine. In other words, the abnormal noise is the external manifestation of the unreasonable assembly relationship inside the machine. When the abnormal noise exists, the user will feel that the range hood makes a harsh sound.

[0003] Specifically, the core components of the range hood related to the abnormal sound transmission path mainly include a motor, a motor bracket, an impeller, a fan housing, a main chassis and a smoke hood. Among them, the motor is installed on the fan housing through the motor bracket and is connected to the impeller by transmission. The fan housing is fixed inside the main chassis, and the smoke hood is fixed to the lower part of the main chassis. The motor serves as the power source inside the range hood, and it drives the impeller to rotate and do work. At the same time, it will also generate the source of vibration, and the vibration is the source of the abnormal sound. In the prior art, the fan housing usually adopts a rigid housing, and the fan housing and the main chassis, as well as the main chassis and the smoke hood, are rigidly connected, so that the vibration generated when the motor drives the impeller to rotate is easily transmitted to the fan housing and continues to be transmitted to the main chassis and the smoke hood. As the vibration transmission path is extended, the number of positions where the vibration passes through unreasonable assembly relationships will increase, and the probability of abnormal sound generation will increase.

[0004] Therefore, there is an urgent need for a range hood to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a range hood to improve the problem of abnormal noises in a motor housing and a main box.

[0006] The utility model provides a range hood, which comprises a main box and a fan arranged in the main box, wherein the fan comprises a fan casing and a motor installed on the fan casing, and an impeller transmission-connected to the motor, and the range hood also comprises a retractable support member, one end of the support member is connected to the main box, and the other end of the support member is connected to the fan casing.

[0007] As a preferred technical solution of the range hood, the support member comprises a cylinder body, a piston and a piston rod, the cylinder body has an inner cavity, the piston is slidably disposed in the cylinder body and divides the inner cavity into a rod cavity and a rodless cavity, the piston rod is connected to the piston and partially extends out of the cylinder body, one of the piston rod and the cylinder body is hinged to the fan housing, and the other of the piston rod and the cylinder body is hinged to the main housing;

[0008] The rod chamber and the rodless chamber are both filled with compressed air; or,

[0009] One of the rod chamber and the rodless chamber is filled with compressed air, and the other of the rod chamber and the rodless chamber is provided with a first elastic member; or,

[0010] The rod chamber and the rodless chamber are both filled with damping fluid, and the cylinder body or the piston is provided with a damping flow channel connecting the rod chamber and the rodless chamber.

[0011] As a preferred technical solution of the range hood, the rod chamber and the rodless chamber are both filled with damping fluid, and the cylinder body or the piston is provided with a damping flow channel connecting the rod chamber and the rodless chamber;

[0012] The support member further includes a first control valve, and the first control valve is used to adjust the opening of the damping flow channel.

[0013] As a preferred technical solution for the range hood, the opening of the damping flow channel decreases as the vibration amplitude of the fan housing increases.

[0014] As a preferred technical solution of the range hood, the cylinder body is provided with a first installation cavity communicated with the damping flow channel, and a communication hole;

[0015] The first control valve includes a first valve core slidably arranged in the connecting hole, and a second elastic member respectively connected to the first valve core and the cylinder body, the first valve core divides the first installation cavity into a liquid-free cavity and a liquid cavity, the second elastic member is located in the liquid-free cavity and is configured to make the first valve core always have a tendency to move toward the liquid cavity, the liquid cavity is connected to the connecting hole, and the connecting hole is connected to one of the rod cavity and the rodless cavity, the first valve core is provided with an adjustment hole, the adjustment hole is connected in series to the damping flow channel, and the adjustment hole can be partially or fully connected to the damping flow channel.

[0016] As a preferred technical solution of the range hood, the rod chamber and the rodless chamber are both filled with damping fluid, and the cylinder body or the piston is provided with a plurality of damping flow channels connecting the rod chamber and the rodless chamber;

[0017] The support member further comprises a second control valve, and the second control valve is used to open a part or all of the plurality of damping flow channels.

[0018] As a preferred technical solution of the range hood, the number of the damping flow channels opened by the second control valve decreases as the vibration amplitude of the fan housing increases.

[0019] As an optimal technical solution for the range hood, the cylinder body is provided with a second installation cavity which is connected to several of the damping flow channels, the second control valve includes a second valve core slidably arranged in the second installation cavity, and an electromagnet and a third elastic member which are both located in the second installation cavity and respectively located at both ends of the second valve core, the third elastic member connects the second valve core and the cylinder body, the electromagnet and the second valve core are magnetically matched, the force applied by the electromagnet to the second valve core is opposite to the direction of the force applied by the elastic member to the second valve core, and the power supply current of the electromagnet is inversely proportional to the vibration amplitude of the fan casing.

[0020] As a preferred technical solution for the range hood, the fan housing includes a fan housing body, and an ACF artificial cartilage material partially or completely coated on the outside of the fan housing body.

[0021] As a preferred technical solution for the range hood, the main case includes a main case body, and an ACF artificial cartilage material partially or completely coated on the outside of the main case body.

[0022] The range hood provided by the utility model has at least the following beneficial effects:

[0023] The range hood includes a main box, and a fan disposed in the main box, the fan including a fan housing, a motor mounted on the fan housing, and an impeller drivingly connected to the motor. The range hood also includes a retractable support member, one end of the support member is connected to the main box, and the other end of the support member is connected to the fan housing. The structural strength of the fan housing and the main box can be enhanced by supporting the support member between the fan housing and the main box, and when the vibration generated by the fan is transmitted to the fan housing and the main box, the support member will be retracted and generate a damping force to buffer the vibration of the fan housing and the main box, thereby avoiding or reducing the generation of abnormal noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structure of the range hood in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0025] Figure 2 The structure of the range hood in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0026] Figure 3 The structure of the support member in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0027] Figure 4 for Figure 3 An enlarged view of the local structure of the support member shown Figure 1 ;

[0028] Figure 5 for Figure 3 An enlarged view of the local structure of the support member shown Figure 2 ;

[0029] Figure 6 The structure of the support member in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0030] Figure 7 for Figure 6 An enlarged view of the partial structure of the support member is shown.

[0031] In the figure:

[0032] 1. Main chassis;

[0033] 2. Fan; 21. Fan housing; 22. Motor; 23. Impeller;

[0034] 3. Smoke hood;

[0035] 4. Support member; 41. Cylinder body; 411. Rod chamber; 412. Rodless chamber; 413. Damping channel; 414. First installation chamber; 4141. Liquidless chamber; 4142. Liquid chamber; 415. Connecting hole; 416. Second installation chamber; 42. Piston; 43. Piston rod; 44. First control valve; 441. First valve core; 4411. Adjusting hole; 442. Second elastic member; 45. Second control valve; 451. Second valve core; 452. Electromagnet; 453. Third elastic member. DETAILED DESCRIPTION

[0036] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and 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" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] The present embodiment provides a range hood, which may specifically be a top-suction range hood, a side-suction range hood, etc., and may be used in a kitchen to handle fumes generated during cooking.

[0041] For details, please refer to Figure 1 and Figure 2 The range hood includes a main box 1, and a fan 2 disposed in the main box 1, the fan 2 includes a fan 2 housing, a motor 22 mounted on the fan 2 housing, and an impeller 23 drivingly connected to the motor 22. The motor 22 drives the impeller 23 to rotate to generate negative pressure and can be used to absorb oil smoke generated during cooking. The motor 22 can be fixed to the fan 2 through a motor 22 bracket.

[0042] Optionally, the range hood further comprises a fume hood 3 connected to the main case 1 . Driven by the fan 2 , the fume can sequentially pass through the fume hood 3 , the main case 1 and enter the fan 2 , and then can be discharged into the exhaust duct by the fan 2 .

[0043] In the prior art, the fan casing is usually a rigid casing, and a rigid connection is adopted between the fan casing and the main case, as well as between the main case and the smoke hood. As a result, the vibration generated when the motor drives the impeller to rotate is easily transmitted to the fan casing and continues to be transmitted to the main case and the smoke hood. As the vibration transmission path is extended, the vibration will increase when it passes through positions with unreasonable assembly relationships, thereby increasing the probability of abnormal noise.

[0044] In this regard, the range hood provided in this embodiment further includes a retractable support member 4, one end of which is connected to the main chassis 1, and the other end of which is connected to the housing of the fan 2. The support member 4 is supported between the housing of the fan 2 and the main chassis 1, so that the structural strength of the housing of the fan 2 and the main chassis 1 can be enhanced at the same time, and when the vibration generated by the fan 2 is transmitted to the housing of the fan 2 and the main chassis 1, the support member 4 will be retracted and generate a damping force to buffer the vibration of the housing of the fan 2 and the main chassis 1, thereby avoiding or reducing the generation of abnormal noise.

[0045] Optionally, the range hood includes a plurality of support members 4, the plurality of support members 4 are arranged in groups of two, and the two support members 4 in each group are spaced and arranged oppositely on both sides of the housing of the fan 2. In this arrangement, when the housing of the fan 2 vibrates, the two support members 4 in each group can provide damping forces in opposite directions to further enhance the buffering effect of the vibration of the housing of the fan 2 and avoid or reduce the generation of abnormal noise.

[0046] The support member 4 may be a spring, such as a compression spring or a tension spring, etc.; the support member 4 may also be a damping shock absorber.

[0047] In this embodiment, the support member 4 is exemplarily provided as a damping shock absorber. Figures 3 to 7As shown, the support member 4 includes a cylinder body 41, a piston 42 and a piston rod 43. The cylinder body 41 has an inner cavity. The piston 42 is slidably disposed in the cylinder body 41 and divides the inner cavity into a rod cavity 411 and a rodless cavity 412. The piston rod 43 is connected to the piston 42 and partially extends out of the cylinder body 41. One of the piston rod 43 and the cylinder body 41 is hinged to the housing of the fan 2, and the other of the piston rod 43 and the cylinder body 41 is hinged to the main chassis 1. The rod cavity 411 and the rodless cavity 412 are both filled with damping fluid, and the cylinder body 41 is provided with a damping flow channel 413 connecting the rod cavity 411 and the rodless cavity 412. Specifically, in this embodiment, an exemplary solution is given in which the piston rod 43 is hinged to the housing of the fan 2, and the cylinder body 41 is hinged to the main chassis 1. When the fan 2 housing or the main box 1 vibrates, the piston rod 43 and the piston 42 will be driven to slide synchronously in the inner cavity. The movement of the piston 42 will cause the damping fluid to flow between the rod chamber 411 and the rodless chamber 412 through the damping channel 413, thereby generating a damping force, which can buffer the vibration of the fan 2 housing or the main box 1. The damping fluid can be a liquid with a certain viscosity such as silicone oil. In other embodiments, the piston rod 43 and the main box 1 can also be hinged, and the cylinder body 41 and the fan 2 housing can be hinged. In other embodiments, the damping channel 413 can also be provided on the piston 42.

[0048] As an alternative solution, the rod chamber 411 and the rodless chamber 412 in the cylinder body 41 can also be filled with compressed air. When the fan 2 casing or the main box 1 vibrates, it will drive the piston 42 to move synchronously. The piston 42 will compress the space in the rod chamber 411 or the rodless chamber 412, causing the pressure difference on both sides of the rod chamber 411 and the rodless chamber 412 to change, thereby giving the piston 42 a force, which can buffer the vibration of the fan 2 casing or the main box 1, thereby avoiding or reducing the generation of abnormal noise.

[0049] As an alternative, one of the rod chamber 411 and the rodless chamber 412 is filled with compressed air, and the other of the rod chamber 411 and the rodless chamber 412 is provided with a first elastic member (not shown in the drawings). The vibration of the fan 2 housing or the main chassis 1 can also be buffered.

[0050] Optionally, see Figure 4 The support member 4 further includes a first control valve 44, which is used to adjust the opening of the damping channel 413. By providing the first control valve 44, the damping force can be adjusted to meet the requirements of the damping force in different application scenarios.

[0051] In this embodiment, the opening of the damping channel 413 decreases as the vibration amplitude of the fan 2 housing increases. In this way, when the vibration amplitude of the fan 2 housing or the main chassis 1 is larger, the opening of the damping channel 413 is smaller, and a larger damping force is generated, so that the support stability and buffering effect of the support member 4 can be effectively enhanced.

[0052] For details, please refer to Figure 4 and Figure 5 , the cylinder body 41 is provided with a first installation chamber 414 connected with the damping flow channel 413, and a connecting hole 415; the first control valve 44 includes a first valve core 441 slidably arranged in the connecting hole 415, and a second elastic member 442 respectively connected with the first valve core 441 and the cylinder body 41, the first valve core 441 divides the first installation chamber 414 into a liquid-free chamber 4141 and a liquid chamber 4142, the second elastic member 442 is located in the liquid-free chamber 4141 and is configured so that the first valve core 441 always has a tendency to move toward the liquid chamber 4142, the liquid chamber 4142 is connected with the connecting hole 415, and the connecting hole 415 is connected with one of the rod chamber 411 and the rodless chamber 412, the first valve core 441 is provided with an adjusting hole 4411, the adjusting hole 4411 is connected in series with the damping flow channel 413, and the adjusting hole 4411 can be partially or fully connected with the damping flow channel 413. There is no damping liquid in the liquid-free cavity 4141, and damping liquid is filled in the liquid cavity 4142. The end of the first valve core 441 located in the liquid cavity 4142 is subject to the hydraulic pressure given by the damping liquid, and the end of the first valve core 441 located in the liquid-free cavity 4141 is subject to the elastic force given by the second elastic member 442. The hydraulic pressure and the elastic force are compared to determine the position of the first valve core 441 in the first installation cavity 414. The change of the position of the first valve core 441 will cause the opening of the regulating hole 4411 connected to the damping channel to change, thereby causing the damping liquid to generate different damping forces when flowing through the first regulating valve. Preferably, the aperture of the regulating hole 4411 is equal to the aperture of the damping channel.

[0053] As an alternative, see Figure 6 The support member 4 further includes a second control valve 45, which is used to open a part or all of the plurality of damping channels 413. By adjusting the number of damping channels 413 opened by the second control valve 45, the damping force of the support member 4 can be adjusted, and the damping force requirements in different application scenarios can also be met.

[0054] In this embodiment, the number of damping channels 413 opened by the second control valve 45 decreases as the vibration amplitude of the housing of the fan 2 increases. In this way, when the vibration amplitude of the housing of the fan 2 or the main chassis 1 is larger, the number of damping channels 413 opened is smaller, and a greater damping force will be generated, which can also effectively enhance the support stability and buffering effect of the support member 4.

[0055] For details, please refer to Figure 7 The cylinder body 41 is provided with a second installation cavity 416 which is connected with a plurality of damping channels 413. The second control valve 45 includes a second valve core 451 which is slidably arranged in the second installation cavity 416, and an electromagnet 452 and a third elastic member 453 which are both located in the second installation cavity 416 and respectively located at both ends of the second valve core 451. The third elastic member 453 connects the second valve core 451 and the cylinder body 41. The electromagnet 452 and the second valve core 451 are magnetically matched. The force exerted by the electromagnet 452 on the second valve core 451 is opposite to the force exerted by the elastic member on the second valve core 451, and the power supply current of the electromagnet 452 is inversely proportional to the vibration amplitude of the housing of the fan 2. Among them, the second valve core 451 is made of a material which can be magnetically adsorbed. The position of the second valve core 451 is determined by comparing the force exerted by the electromagnet 452 on the second valve core 451 with the force exerted by the elastic member on the second valve core 451, and then the number of large damping channels opened by the second valve core 451 is adjusted, so that different damping forces can be generated.

[0056] Optionally, the fan 2 housing includes a fan 2 housing body, and an ACF (Artificial Cartilage Foam) artificial cartilage material partially or completely coated outside the fan 2 housing body. In this way, when the fan 2 housing vibrates, the ACF artificial cartilage material can effectively absorb the vibration, thereby avoiding or reducing the generation of abnormal sound.

[0057] Optionally, the main chassis 1 includes a main chassis body, and an ACF artificial cartilage material partially or completely coated outside the main chassis body. In this way, when the main chassis 1 vibrates, the ACF artificial cartilage material can effectively absorb the vibration, thereby avoiding or reducing the generation of abnormal sound.

[0058] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A range hood, comprising a main housing (1), and a fan (2) arranged in the main housing (1), the fan (2) comprising a fan (2) housing, a motor (22) mounted on the fan (2) housing, and an impeller (23) drivingly connected to the motor (22), characterized in that: The range hood further comprises a retractable support member (4), one end of the support member (4) being connected to the main housing (1), and the other end of the support member (4) being connected to the outer casing of the fan (2).

2. The range hood according to claim 1, characterized in that: The support member (4) comprises a cylinder body (41), a piston (42) and a piston rod (43); the cylinder body (41) has an inner cavity; the piston (42) is slidably disposed in the cylinder body (41) and divides the inner cavity into a rod cavity (411) and a rodless cavity (412); the piston rod (43) is connected to the piston (42) and partially extends out of the cylinder body (41); one of the piston rod (43) and the cylinder body (41) is hinged to the housing of the fan (2); and the other of the piston rod (43) and the cylinder body (41) is hinged to the main housing (1); The rod chamber (411) and the rodless chamber (412) are both filled with compressed air; or, One of the rod chamber (411) and the rodless chamber (412) is filled with compressed air, and the other of the rod chamber (411) and the rodless chamber (412) is provided with a first elastic member; or, The rod chamber (411) and the rodless chamber (412) are both filled with damping fluid, and the cylinder body (41) or the piston (42) is provided with a damping flow channel (413) connecting the rod chamber (411) and the rodless chamber (412).

3. The range hood according to claim 2, characterized in that: When the rod chamber (411) and the rodless chamber (412) are both filled with damping fluid, and the cylinder body (41) or the piston (42) is provided with a damping flow channel (413) communicating with the rod chamber (411) and the rodless chamber (412); The support member (4) further comprises a first control valve (44), wherein the first control valve (44) is used to adjust the opening degree of the damping flow channel (413).

4. The range hood according to claim 3, characterized in that: The opening of the damping flow channel (413) decreases as the vibration amplitude of the fan (2) casing increases.

5. The range hood according to claim 4, characterized in that: The cylinder body (41) is provided with a first installation cavity (414) communicating with the damping flow channel (413), and a communication hole (415); The first control valve (44) comprises a first valve core (441) slidably disposed in the communicating hole (415), and a second elastic member (442) connected to the first valve core (441) and the cylinder body (41), respectively; the first valve core (441) divides the first installation cavity (414) into a liquid-free cavity (4141) and a liquid-containing cavity (4142); the second elastic member (442) is located in the liquid-free cavity (4141) and is configured to ensure that the first valve core (441) always has a liquid-free cavity (4141). There is a tendency to move toward the liquid chamber (4142), the liquid chamber (4142) is connected to the connecting hole (415), the connecting hole (415) is connected to one of the rod chamber (411) and the rodless chamber (412), the first valve core (441) is provided with an adjusting hole (4411), the adjusting hole (4411) is connected in series to the damping channel (413), and the adjusting hole (4411) can be partially or fully connected to the damping channel (413).

6. The range hood according to claim 2, characterized in that: The rod chamber (411) and the rodless chamber (412) are both filled with damping fluid, and the cylinder body (41) or the piston (42) is provided with a plurality of damping flow channels (413) connecting the rod chamber (411) and the rodless chamber (412); The support member (4) further comprises a second control valve (45), wherein the second control valve (45) is used to open a part or all of the plurality of damping flow channels (413).

7. The range hood according to claim 6, characterized in that: The number of the damping flow channels (413) opened by the second control valve (45) decreases as the vibration amplitude of the fan (2) casing increases.

8. The range hood according to claim 7, characterized in that: The cylinder body (41) is provided with a second installation cavity (416) which is in communication with the plurality of damping flow channels (413); the second control valve (45) comprises a second valve core (451) which is slidably arranged in the second installation cavity (416); and an electromagnet (452) and a third elastic member (453) which are both located in the second installation cavity (416) and respectively located at two ends of the second valve core (451); the third elastic member (453) connects the second valve core (451) and the cylinder body (41); the electromagnet (452) and the second valve core (451) are magnetically matched; the force exerted by the electromagnet (452) on the second valve core (451) is opposite in direction to the force exerted by the elastic member on the second valve core (451); and the power supply current of the electromagnet (452) is inversely proportional to the vibration amplitude of the fan (2) casing.

9. The range hood according to any one of claims 1 to 8, characterized in that: The fan (2) housing comprises a fan (2) housing body, and an ACF artificial cartilage material partially or completely coated on the outside of the fan (2) housing body.

10. The range hood according to any one of claims 1 to 8, characterized in that: The main case (1) comprises a main case body, and an ACF artificial cartilage material partially or completely coated on the outside of the main case body.

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