Liquid damping structure for noise reduction of range hood and range hood

Abstract

The invention belongs to the technical field of range hoods, and particularly discloses a liquid damping structure for noise reduction of a range hood and the range hood. The problem that an existing range hood is high in noise is solved. The liquid damping structure comprises a first-stage damping device and a second-stage damping device which are fixed on a coaming of the range hood, the first-stage damping device and the second-stage damping device are longitudinally arranged, and the first-stage damping device is positioned below the second-stage damping device; the first-stage damping device and the second-stage damping device each comprise a pressure relief hole and a damping cavity used for containing liquid, a plurality of oil baffle plates are arranged in the damping cavities, and liquid circulation holes and fins are arranged on the oil baffle plates. The vibration kinetic energy of the coaming can be absorbed through the damping devices arranged on the coaming, and is converted into the vibration kinetic energy of liquid in the damping devices, so that the noise generated by vibration of the coaming of the range hood is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of range hoods, and in particular relates to a liquid shock-absorbing structure for reducing noise of a range hood and the range hood. Background Art

[0002] After the range hood is started, part of the energy brought by the flow of oil smoke is converted into noise, and the other part is converted into the vibration of the machine body. In addition, the frequent vibration of the metal box will also produce a lot of more obvious noise. Existing range hoods generally use sound-absorbing cotton to absorb and reduce noise, but the sound-absorbing effect of sound-absorbing cotton is limited. Summary of the invention

[0003] One object of the present invention is to provide a liquid shock-absorbing structure for reducing the noise of a range hood, so as to effectively solve the problem of high noise of existing range hoods.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A liquid damping structure for reducing noise of a range hood comprises a primary damping device and a secondary damping device fixed on a panel of the range hood, wherein the primary damping device and the secondary damping device are arranged longitudinally, and the primary damping device is located below the secondary damping device.

[0006] The primary shock absorbing device and the secondary shock absorbing device both comprise a pressure relief hole and a shock absorbing cavity for containing liquid, a plurality of oil baffles are arranged in the shock absorbing cavity, and the oil baffles are provided with liquid circulation holes and fins.

[0007] Furthermore, the fins are triangular in shape, and the top angles of the fins on adjacent oil baffles are oriented in opposite directions.

[0008] Furthermore, each of the oil baffles is arranged transversely in the shock absorbing cavity.

[0009] Furthermore, the volume of the shock absorbing chamber of the primary shock absorbing device is greater than the volume of the shock absorbing chamber of the secondary shock absorbing device.

[0010] Furthermore, the longitudinal sections of the primary shock absorbing device and the secondary shock absorbing device are both rectangular, and the longitudinal sections of the primary shock absorbing device and the secondary shock absorbing device are both trapezoidal.

[0011] Furthermore, the pressure relief hole of the primary shock absorbing device is arranged on the top wall of the primary shock absorbing device, and the pressure relief hole of the secondary shock absorbing device is arranged on the top wall of the secondary shock absorbing device.

[0012] Another object of the present invention is to provide a range hood, comprising a box body and a surrounding plate, wherein the liquid shock-absorbing structure for noise reduction of the range hood as described in the above embodiments is fixed on the inner wall of the surrounding plate, and the first-stage shock-absorbing device and the second-stage shock-absorbing device each form a closed shock-absorbing cavity with the inner wall of the surrounding plate, and the shock-absorbing cavity contains liquid.

[0013] Furthermore, a fixing block for limiting and supporting the liquid shock absorbing structure is bolted to the inner wall of the enclosure.

[0014] Furthermore, the liquid is non-volatile oil or water having a lubricating effect.

[0015] Furthermore, the bottom end of the enclosure is connected to the top end of the box body, a check valve and an electric control box are provided at the top end of the enclosure, and an oil cup is provided at the bottom end of the box body.

[0016] Compared with the prior art, the beneficial technical effects of the present invention are:

[0017] (1) The present invention can absorb the kinetic energy of the vibration of the enclosure by means of the various levels of shock absorbing devices arranged on the enclosure, and convert it into the kinetic energy of the vibration of the liquid itself in the various levels of shock absorbing devices, thereby reducing the noise generated by the vibration of the enclosure of the range hood.

[0018] (2) The present invention provides an oil baffle in the shock absorbing cavity and provides liquid flow holes and fins on the oil baffle, which is conducive to reducing the impact force of the liquid on the shock absorbing cavity wall and the range hood when the liquid vibrates. By making the top angles of the fins on adjacent oil baffles face in opposite directions, the liquid flow becomes more disordered, thereby further reducing the impact force of the liquid, which is conducive to shock and noise reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the enclosure of the range hood.

[0020] Figure 2 It is a three-dimensional structural schematic diagram of a primary shock absorbing device or a secondary shock absorbing device.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the range hood in Example 2.

[0022] Explanation of the reference numerals: enclosure plate-1; primary shock absorbing device-2; secondary shock absorbing device-3; pressure relief hole-4; shock absorbing chamber-5; oil baffle plate-6; fin-7; box body-8; check valve-9; electric control box-10; oil cup-11; fixing block-12. DETAILED DESCRIPTION

[0023] Embodiment 1: A liquid damping structure for reducing noise of a range hood, such as Figure 1As shown, it includes a primary shock absorbing device 2 and a secondary shock absorbing device 3 fixed on the enclosure 1 of the range hood, the primary shock absorbing device 2 and the secondary shock absorbing device 3 are arranged longitudinally, and the primary shock absorbing device 2 is located below the secondary shock absorbing device 3.

[0024] In this embodiment, if Figure 2 As shown, the longitudinal sections of the primary shock absorbing device 2 and the secondary shock absorbing device 3 are both rectangular, and the longitudinal sections of the primary shock absorbing device 2 and the secondary shock absorbing device 3 are both trapezoidal.

[0025] like Figure 2 As shown, both the primary shock absorbing device 2 and the secondary shock absorbing device 3 include a pressure relief hole 4 and a shock absorbing chamber 5 for containing liquid. In the present embodiment, the volume of the shock absorbing chamber 5 of the primary shock absorbing device 2 is greater than that of the shock absorbing chamber 5 of the secondary shock absorbing device 3. Therefore, the primary shock absorbing device 2 has more liquid inside, which is more conducive to fully absorbing vibration energy. The secondary shock absorbing device 3 has a smaller cavity and thinner liquid, which is easier to trigger when the range hood vibrates slightly.

[0026] In this embodiment, the pressure relief hole 4 of the first-stage shock absorbing device 2 is arranged on the top wall of the first-stage shock absorbing device 2, and the pressure relief hole 4 of the second-stage shock absorbing device 3 is arranged on the top wall of the second-stage shock absorbing device 3, which is beneficial to balance the internal pressure of the shock absorbing cavity 5 and prevent the temperature in the cavity from rising due to the vibration of the internal liquid, thereby causing excessive pressure inside the cavity.

[0027] like Figure 2 As shown, a plurality of oil baffles 6 are provided in the shock absorbing chamber 5, and the built-in oil baffles 6 can prevent the liquid in the chamber from displacing too long and causing a rapid impact on the inner wall of the shock absorbing chamber 5, thereby reducing the impact force of the liquid during vibration. In this embodiment, the oil baffles 6 are arranged horizontally in the shock absorbing chamber 5.

[0028] The oil baffle plate 6 is provided with liquid flow holes and triangular fins 7, and the vertex angles of the fins 7 on adjacent oil baffle plates 6 are in opposite directions. The provision of the liquid flow holes can facilitate the flow of the liquid in the cavity within the entire cavity. The provision of the fins 7 can disturb the flow of the liquid; the vertex angles of the fins 7 on adjacent oil baffle plates 6 are in opposite directions, making the flow of the liquid more disordered, thereby reducing the impact force of the liquid on the wall of the damping cavity 5.

[0029] Embodiment 2: A range hood, such as Figure 3 As shown, it includes a box body 8 and a panel 1, the bottom end of the panel 1 is connected to the top end of the box body 8, a check valve 9 and an electric control box 10 are provided at the top end of the panel 1, and an oil cup 11 is provided at the bottom end of the box body 8. The liquid damping structure for noise reduction of the range hood described in Example 1 is fixed on the inner wall of the panel 1. The first-stage damping device 2 and the second-stage damping device 3 each form a closed damping cavity 5 with the inner wall of the panel 1, and the damping cavity 5 contains liquid. In this embodiment, the liquid is a non-volatile oil with a lubricating effect.

[0030] In this embodiment, a fixing block 12 for limiting and supporting the liquid damping structure is bolted to the inner wall of the enclosure 1. In this embodiment, there is a fixing block 12 on both sides of the bottom of each level of the damping device, and the damping devices at each level are fixed to the enclosure 1 and closely fit with the enclosure 1 through the fixing blocks 12, which is conducive to full contact and absorption of kinetic energy, and transfers part of the mechanical vibration of the enclosure 1 to the liquid vibration in the damping devices at each level, thereby reducing the noise generated by the vibration of the enclosure 1 of the range hood.

[0031] The working principle of the present invention is that after the range hood is started, part of the energy brought by the flow of oil smoke is converted into noise, and the other part is converted into the vibration of the machine body itself, and the frequent vibration of the metal box will also generate a large amount of more intuitive noise. The present invention can absorb the kinetic energy of the vibration of the enclosure 1 through the various levels of shock absorbing devices arranged on the enclosure 1, and convert it into the kinetic energy of the vibration of the liquid itself in the various levels of shock absorbing devices, thereby reducing the noise generated by the vibration of the enclosure 1 of the range hood.

[0032] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A liquid damping structure for reducing noise of a range hood, characterized in that: It comprises a primary shock absorbing device and a secondary shock absorbing device fixed on the enclosure of the range hood, wherein the primary shock absorbing device and the secondary shock absorbing device are arranged longitudinally, and the primary shock absorbing device is located below the secondary shock absorbing device; The primary shock absorbing device and the secondary shock absorbing device both comprise a pressure relief hole and a shock absorbing cavity for containing liquid, a plurality of oil baffles are arranged in the shock absorbing cavity, and the oil baffles are provided with liquid circulation holes and fins.

2. The liquid damping structure for reducing noise of a range hood according to claim 1, characterized in that: The fins are triangular in shape, and the top angles of the fins on adjacent oil baffles are in opposite directions.

3. The liquid shock absorbing structure for reducing noise of a range hood according to claim 2, characterized in that: The oil baffles are arranged transversely in the shock absorbing cavity.

4. The liquid shock absorbing structure for reducing noise of a range hood according to claim 3, characterized in that: The volume of the shock absorbing chamber of the primary shock absorbing device is greater than the volume of the shock absorbing chamber of the secondary shock absorbing device.

5. The liquid shock absorbing structure for reducing noise of a range hood according to claim 4, characterized in that: The longitudinal sections of the primary shock absorbing device and the secondary shock absorbing device are both rectangular, and the longitudinal sections of the primary shock absorbing device and the secondary shock absorbing device are both trapezoidal.

6. The liquid shock absorbing structure for reducing noise of a range hood according to claim 5, characterized in that: The pressure relief hole of the primary shock absorbing device is arranged on the top wall of the primary shock absorbing device, and the pressure relief hole of the secondary shock absorbing device is arranged on the top wall of the secondary shock absorbing device.

7. A range hood, comprising a housing and a panel, characterized in that: A liquid damping structure for reducing noise of a range hood according to any one of claims 1 to 6 is fixed to the inner wall of the enclosure, and the primary damping device and the secondary damping device each form a closed damping cavity with the inner wall of the enclosure, and the damping cavity contains liquid.

8. The range hood according to claim 7, characterized in that: A fixing block for limiting and supporting the liquid shock absorbing structure is bolted to the inner wall of the enclosure.

9. The range hood according to claim 8, characterized in that: The liquid is non-volatile oil or water having a lubricating effect.

10. The range hood according to claim 9, characterized in that: The bottom end of the enclosure is connected to the top end of the box body, a check valve and an electric control box are arranged on the top end of the enclosure, and an oil cup is arranged on the bottom end of the box body.

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