A low-noise gas water heater

Abstract

The present invention discloses a low-noise gas water heater, which includes a water tank housing, a burner and a heat exchanger. The burner and the heat exchanger are disposed inside the water tank housing. The low-noise gas water heater further includes a first sound guiding channel, a second sound guiding channel and a sound absorption cavity. A first inlet and a second inlet are provided on the sound absorption cavity. A spiral metasurface structure is disposed in the sound absorption cavity between the first inlet and the second inlet. One end of the first sound guiding channel is communicated with the water tank housing, and the other end is communicated with the first inlet. One end of the second sound guiding channel is communicated with the water tank housing, and the other end is communicated with the second inlet. It has low noise and can improve the user experience to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and particularly to a low-noise gas water heater. Background Art

[0002] In related technologies, gas water heaters are widely recognized by consumers due to their advantages such as energy conservation and environmental protection. However, the noise problem during the operation of gas water heaters is also troublesome. It is understood that the national standard for the noise requirement of gas water heaters during combustion is not more than 65 decibels, while the noise generated by ordinary gas water heaters during operation is generally above 55 decibels. If the noise value is too high, it will affect people's hearing. According to medical experimental data, a noise value exceeding 50 decibels is equivalent to a person speaking loudly, affecting normal life; 60 - 70 decibels is equivalent to standing on a busy road, which will make people feel upset and inattentive; above 90 decibels is equivalent to being in a noisy bar, and living in such a noisy environment for a long time will seriously affect hearing and lead to the occurrence of other diseases such as heart and blood vessels. Therefore, noise has become an urgent technical problem existing in existing gas water heaters. With the improvement of people's requirements for the quality of life, when consumers choose a gas water heater, they are increasingly concerned about the size of the noise parameter of the gas water heater. It can be said that the quality of the noise performance is a key factor in the product competitiveness. Summary of the Invention

[0003] The present invention aims to solve at least one of the problems existing in the related technologies to a certain extent. For this purpose, the present invention provides a low-noise gas water heater with low noise, which can improve the user experience to a certain extent.

[0004] The above object is achieved by the following technical solutions:

[0005] A low-noise gas water heater includes a water tank housing, a burner, and a heat exchanger. The burner and the heat exchanger are disposed inside the water tank housing. The gas inlet end of the burner is connected to a gas valve. It further includes a first sound guiding channel, a second sound guiding channel, and a sound absorption cavity. A first inlet and a second inlet are provided on the sound absorption cavity. A spiral metasurface structure is disposed between the first inlet and the second inlet and inside the sound absorption cavity. One end of the first sound guiding channel is communicated with the water tank housing, and the other end is communicated with the first inlet. One end of the second sound guiding channel is communicated with the water tank housing, and the other end is communicated with the second inlet.

[0006] In some embodiments, the spiral metasurface structure includes a plurality of spaced-apart ones.

[0007] In some embodiments, a first perforated plate is disposed between the first inlet and the spiral metasurface structure, and a second perforated plate is disposed between the second inlet and the spiral metasurface structure.

[0008] In some embodiments, the ratio of the outlet diameter to the inlet diameter of the first sound guiding channel is between 1:2 and 1:3.

[0009] In some embodiments, the ratio of the outlet diameter to the inlet diameter of the second sound guiding channel is between 1:2 and 1:3.

[0010] In some embodiments, the connection between the first sound guiding channel and the water tank housing, and the connection between the second sound guiding channel and the water tank housing are located between the burner and the heat exchanger.

[0011] Compared with the prior art, the present invention has at least the following beneficial effects:

[0012] 1. The present invention provides a low-noise gas water heater with low noise, which can improve the user experience to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a partial perspective view of the gas water heater in the embodiment;

[0014] Figure 2 is a perspective schematic diagram of the sound absorption cavity in the embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following embodiments are used to illustrate the present invention, but the present invention is not limited by these embodiments. Modifying the specific implementation manners of the present invention or equivalently replacing some technical features without departing from the spirit of the present invention scheme shall be covered within the scope of the technical solution claimed by the present invention.

[0016] Embodiment 1: As shown in Figure 1 and Figure 2 , this embodiment provides a low-noise gas water heater, including a water tank housing 1, a burner and a heat exchanger, wherein the burner and the heat exchanger are arranged inside the water tank housing 1. The gas inlet end of the burner is connected to a gas valve, and further includes a first sound guiding channel 2, a second sound guiding channel 3 and a sound absorption cavity 4. A first inlet 401 and a second inlet 402 are arranged on the sound absorption cavity 4. A spiral metasurface structure 5 is arranged between the first inlet 401 and the second inlet 402 and inside the sound absorption cavity 4. One end of the first sound guiding channel 2 is communicated with the water tank housing 1, and the other end is communicated with the first inlet 401. One end of the second sound guiding channel 3 is communicated with the water tank housing 1, and the other end is communicated with the second inlet 402.

[0017] The low-noise gas water heater of this embodiment has low noise and can improve the user experience to a certain extent. Specifically, it can significantly reduce the noise and other indicators of the gas water heater, improve the user experience degree, and enhance the product competitiveness of the company.

[0018] The acoustic metasurface is the product of the pursuit of extreme thinness and lightness in wave control functional structures. It is a branch of acoustic metamaterial research that has emerged in recent years. A metasurface refers to an acoustic structure whose geometric thickness is much smaller than the working wavelength, and its typical wave control function is the regulation of the acoustic wavefront.

[0019] According to Huygens' principle, the wavefront at the next moment is the envelope surface generated when each point on the current wavefront acts as a wave source. Therefore, by using the metasurface structure to change the acoustic phase gradient on the interface, the wavefront of the scattered sound field can be modulated.

[0020] A spiral metasurface structure 5 is arranged in the anechoic chamber 4. The noise generated when the components in the water tank housing 1 work is transmitted to the first sound guiding channel 2 and the second sound guiding channel 3 and then to the first inlet 401 and the second inlet 402. Through the spiral metasurface structure 5, different phase differences can be generated when the sound waves on both sides meet, thereby reducing the sound vibration intensity and achieving reactive noise cancellation. The spiral metasurface structure 5 can be constructed by a spiral channel to form a metasurface.

[0021] In addition, only sound is conducted in the first sound guiding channel 2 and the second sound guiding channel 3, and there is no fluid flow. The heat and flue gas generated by combustion will not flow out from the first sound guiding channel 2 and the second sound guiding channel 3, that is, no energy loss will be caused, thereby ensuring the original combustion and heat exchange effects of the gas water heater.

[0022] In this embodiment, multiple spiral metasurface structures 5 are spaced apart. Its structure is simple, the design is reasonable and ingenious, which can further reduce the sound vibration intensity and achieve reactive noise cancellation.

[0023] Preferably, a first perforated plate 6 is arranged between the first inlet 401 and the spiral metasurface structure 5, and a second perforated plate 7 is arranged between the second inlet 402 and the spiral metasurface structure 5. By setting the first perforated plate 6 and the second perforated plate 7, the sound can enter the spiral metasurface structure 5 more evenly, thereby achieving the purpose of further reducing the sound vibration intensity and realizing reactive noise cancellation.

[0024] In this embodiment, the ratio of the outlet diameter to the inlet diameter of the first sound guiding channel 2 is between 1:2 and 1:3, and the ratio of the outlet diameter to the inlet diameter of the second sound guiding channel 3 is between 1:2 and 1:3. Its structure is simple, the design is reasonable and ingenious. The diameters of the first sound guiding channel 2 and the second sound guiding channel 3 gradually narrow as the sound propagates, and the ratio of the outlet diameter to the inlet diameter is between 1:2 and 1:3, which can achieve the purpose of further reducing the sound vibration intensity and realizing reactive noise cancellation.

[0025] In this embodiment, the connections between the first sound guiding channel 2 and the water tank housing 1, and between the second sound guiding channel 3 and the water tank housing 1 are located between the burner and the heat exchanger. Generally, the noise is the greatest inside the water tank housing 1, between the burner and the heat exchanger. By arranging the inlets of the first sound guiding channel 2 and the second sound guiding channel 3 between the burner and the heat exchanger, the noise inside the water tank housing 1 can be fully introduced into the sound absorption cavity 4 to achieve reactive sound attenuation.

[0026] In this embodiment, the inlets of the first sound guiding channel 2 and the second sound guiding channel 3 are respectively connected to two relatively arranged outer surfaces of the water tank housing 1 to achieve a better noise reduction and sound absorption effect.

[0027] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention.

Claims

1. A low-noise gas water heater, comprising a water tank housing (1), a burner, and a heat exchanger, wherein the burner and the heat exchanger are disposed inside the water tank housing (1), and an air inlet end of the burner is connected to a gas valve. Characterized in that, it further includes a first sound guiding channel (2), a second sound guiding channel (3), and a sound absorption cavity (4). A first inlet (401) and a second inlet (402) are provided on the sound absorption cavity (4). A spiral metasurface structure (5) is disposed inside the sound absorption cavity (4) between the first inlet (401) and the second inlet (402). One end of the first sound guiding channel (2) is communicated with the water tank housing (1), and the other end is communicated with the first inlet (401). One end of the second sound guiding channel (3) is communicated with the water tank housing (1), and the other end is communicated with the second inlet (402); a first perforated plate (6) is disposed between the first inlet (401) and the spiral metasurface structure (5), and a second perforated plate (7) is disposed between the second inlet (402) and the spiral metasurface structure (5); inlets of the first sound guiding channel (2) and the second sound guiding channel (3) are respectively connected to two relatively arranged outer surfaces of the water tank housing (1), and only sound is conducted inside the first sound guiding channel (2) and the second sound guiding channel (3), without fluid flow.

2. The low-noise gas water heater according to claim 1, Characterized in that, the spiral metasurface structure (5) includes a plurality of spaced apart ones.

3. The low-noise gas water heater according to claim 1 or 2, Characterized in that, a ratio of an outlet diameter to an inlet diameter of the first sound guiding channel (2) is between 1:2 and 1:

3.

4. The low-noise gas water heater according to claim 1 or 2, Characterized in that, a ratio of an outlet diameter to an inlet diameter of the second sound guiding channel (3) is between 1:2 and 1:

3.

5. The low-noise gas water heater according to claim 1 or 2, Characterized in that, connections between the first sound guiding channel (2) and the water tank housing (1) and between the second sound guiding channel (3) and the water tank housing (1) are located between the burner and the heat exchanger.

Images