Noise reduction structure of range hood

Abstract

The utility model discloses a range hood noise reduction structure and relates to the field of range hoods, the range hood noise reduction structure is applied to a turbine shell, a sound blocking disc is fixed on the outer wall of one side of an air inlet of the turbine shell, sound absorption cotton is fixed on one side, close to the turbine shell, of the sound blocking disc, and an air inlet channel is formed between the sound absorption cotton and the turbine shell. A heating assembly is fixed to the circumferential outer wall of the turbine shell. According to the noise reduction structure of the range hood, the characteristic that sound is more easily lost in a high-temperature environment is utilized, the heating assembly is arranged on the periphery of the turbine shell to heat the turbine shell, heating can be effectively utilized to ensure that lampblack is separated from the turbine shell and an impeller on the inner side of the turbine shell, meanwhile, heating is utilized to enable the temperature of the turbine shell to be increased, and the noise is reduced. And the sound transmitted to the sound-blocking disc is effectively absorbed by the sound-absorbing cotton which is arranged in a matched manner, so that the effect of reducing the noise is achieved.

Description

Technical Field

[0001] This utility model relates to the field of range hoods, and in particular to a noise reduction structure for range hoods. Background Technology

[0002] The main structure of a range hood includes an outer cover, a turbine housing fixed inside the outer cover, and an impeller assembly fixed inside the turbine housing. By driving the impeller assembly, a negative pressure is created at the oil fume extraction position on the outer cover, causing the oil fumes to be adsorbed into the turbine housing and then discharged from the exhaust end of the turbine housing, thus achieving the effect of removing oil fumes.

[0003] In daily operation, the main source of noise in a range hood is the turbine housing. However, existing technology does not have a corresponding sound-absorbing structure on the side of the air inlet of the turbine housing, which causes a lot of noise to be transmitted directly through the outer cover via the turbine housing. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a noise reduction structure for range hoods that can effectively reduce the noise generated during the operation of the turbine housing.

[0005] To address the problems in the existing technology, the technical solution of this utility model is as follows:

[0006] A noise reduction structure for a range hood is applied to a turbine housing, wherein a sound-damping disc is fixed on the outer wall of the air inlet side of the turbine housing.

[0007] The sound-absorbing disc is fixed with sound-absorbing cotton on the side near the turbine housing, and an air intake channel is formed between the sound-absorbing cotton and the turbine housing.

[0008] A heating assembly is fixed on the circumferential outer wall of the turbine housing;

[0009] On the outer wall of the turbine housing near the sound-absorbing disk, several support bars are fixed in a circular array centered on the axis of the sound-absorbing disk. The end of the support bar near the sound-absorbing disk extends to the side of the sound-absorbing disk away from the turbine housing. The end of the support bar away from the turbine housing forms a bend, and the bend is fixed to the outer wall of the sound-absorbing disk away from the turbine housing.

[0010] The sound-absorbing cotton has multiple sound-absorbing grooves arranged in a ring around the sound-absorbing disc on the side near the turbine housing.

[0011] Preferably, a plastic sleeve is fitted on the outer side of the bent portion, and the plastic sleeve is fixed to the outer wall of the sound-damping disc.

[0012] Preferably, the sound-damping disk is positioned directly opposite the air inlet of the turbine housing, and the axis of the sound-damping disk coincides with the center of the air inlet of the turbine housing.

[0013] Preferably, the heating assembly comprises electric heating wires wrapped around the annular outer periphery of the turbine shell, and the electric heating wires are arranged in a wave shape.

[0014] Compared with the prior art, the utility model has the advantages as follows:

[0015] 1、 through the use of sound in high temperature environment is more easily lost characteristics, through the setting heating assembly in the outer periphery of turbine shell, heating turbine shell can effectively utilize heating to ensure that oil fume and turbine shell and turbine shell inside the impeller separation, at the same time using heating, make turbine shell temperature increases, accelerate the loss of sound, and the sound that spreads to the soundproof disc place is effectively absorbed by the sound-absorbing cotton arranged in cooperation, so as to reach the effect of reducing noise.

[0016] 2、 through the setting plastic sleeve between the support strip and the soundproof disc, utilize the poor heat conduction performance of plastic, can greatly reduce the probability of heat transfer to the soundproof disc through the support strip, reduce the influence of temperature on sound-absorbing cotton. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is the whole structure schematic diagram of the utility model.

[0018] Fig. 2 It is the support strip structure schematic diagram of the utility model.

[0019] Fig. 3 It is the sound-absorbing cotton structure schematic diagram of the utility model.

[0020] Fig. 4 It is the bending portion structure schematic diagram of the utility model

[0021] Fig. 1 turbine shell;2, soundproof disc;3, sound-absorbing cotton;31, sound-absorbing groove;4, air inlet channel;5, support strip;51, bending portion;6, plastic sleeve;7, electric heating wire. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0023] Please refer to Figs. 1 to 4The embodiment provides a noise reduction structure of an oil fume exhauster, which is applied to a turbine shell 1 and comprises a soundproof disc 2 arranged at one side of an air inlet of the turbine shell 1, wherein the soundproof disc 2 is opposite to the air inlet of the turbine shell 1, the axis of the soundproof disc 2 coincides with the center of the air inlet of the turbine shell 1, sound-absorbing cotton 3 is fixed to one side of the soundproof disc 2 close to the turbine shell 1, an air inlet channel 4 is formed between the sound-absorbing cotton 3 and the turbine shell 1, and a plurality of sound-absorbing grooves 31 are formed in the sound-absorbing cotton 3 close to the turbine shell 1 in a ring array with the soundproof disc 2 as the center.

[0024] The oil fume enters the air inlet through the air inlet channel 4 and is then sucked into the inside of the turbine shell 1, and then is discharged through a smoke outlet of the turbine shell 1, so that the effect of discharging the oil fume is achieved, and the noise of the impeller in the turbine shell 1 is absorbed by the sound-absorbing cotton 3 when reaching the sound-absorbing cotton 3, and the sound-absorbing effect of the sound-absorbing cotton 3 is improved by arranging the plurality of sound-absorbing grooves 31.

[0025] Three support strips 5 are fixed to the outer wall of one side of the turbine shell 1 close to the soundproof disc 2 in a ring array with the axis of the soundproof disc 2 as the center, one end of the support strip 5 close to the soundproof disc 2 extends to the side of the soundproof disc 2 away from the turbine shell 1, and a bending part 51 is formed at the end of the support strip 5 away from the turbine shell 1, and the bending part 51 is fixed to the outer wall of the side of the soundproof disc 2 away from the turbine shell 1.

[0026] The three support strips 5 complete the connection work between the soundproof disc 2 and the turbine shell 1, are used for supporting the soundproof disc 2, and guarantee that the soundproof disc 2 is opposite to the air inlet of the turbine shell 1, a plastic sleeve 6 is sleeved outside the bending part 51, the plastic sleeve 6 is fixed to the outer wall of the soundproof disc 2, the plastic sleeve 6 can effectively isolate the support strip 5 and the soundproof disc 2, the heat conduction efficiency of the plastic part is low, heat can be effectively prevented from being transmitted to the soundproof disc 2 through the support strip 5, and the influence of temperature on the sound-absorbing cotton 3 is reduced.

[0027] A heating assembly is fixed to the circumferential outer wall of the turbine shell 1, the heating assembly comprises an electric heating wire 7 which is wrapped around the ring-shaped outer wall of the turbine shell 1, and the electric heating wire 7 is arranged in a wave shape, the electric heating wire 7 is arranged to heat the turbine shell 1 during the oil fume extraction work, so that the temperature in the inner cavity of the turbine shell 1 is increased, and then the separation of oil and grease from the turbine shell 1 and the impeller inside the turbine shell 1 is accelerated, the temperature at the turbine shell 1 is increased by using the electric heating wire 7, in the high-temperature zone, the sound propagation loss is large due to the small medium density, the sound is easy to dissipate, and the rest sound reaches the soundproof disc 2 and is then absorbed by the sound-absorbing cotton 3, so that the noise reduction effect is greatly improved.

[0028] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A noise reduction structure for a range hood, characterized in that, It is applied to the turbine housing (1), and a sound-damping disc (2) is fixed on the outer wall of the air inlet side of the turbine housing (1). The sound-absorbing disc (2) is fixed with sound-absorbing cotton (3) on the side near the turbine housing (1), and an air intake channel (4) is formed between the sound-absorbing cotton (3) and the turbine housing (1). A heating assembly is fixed on the circumferential outer wall of the turbine housing (1); On the outer wall of the turbine housing (1) near the sound-absorbing disk (2), a number of support bars (5) are fixed in a ring array with the axis of the sound-absorbing disk (2) as the center. The end of the support bar (5) near the sound-absorbing disk (2) extends to the side of the sound-absorbing disk (2) away from the turbine housing (1). The end of the support bar (5) away from the turbine housing (1) forms a bend (51). The bend (51) is fixed to the outer wall of the sound-absorbing disk (2) away from the turbine housing (1). The sound-absorbing cotton (3) has multiple sound-absorbing grooves (31) arranged in a ring array with the sound-absorbing disk (2) as the center on the side near the turbine housing (1).

2. The noise reduction structure for a range hood according to claim 1, characterized in that, A plastic sleeve (6) is fitted on the outside of the bent part (51), and the plastic sleeve (6) is fixed to the outer wall of the sound-damping disc (2).

3. The noise reduction structure for a range hood according to claim 1, characterized in that, The sound-damping disk (2) is directly opposite the air inlet of the turbine housing (1), and the axis of the sound-damping disk (2) coincides with the center of the air inlet of the turbine housing (1).

4. The noise reduction structure for a range hood according to claim 1, characterized in that, The heating assembly includes an electric heating wire (7) surrounding the annular outer periphery of the turbine housing (1), and the electric heating wire (7) is arranged in a wavy shape.

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