A noise reduction device, a gas water heater and a control method of the gas water heater

Abstract

The present invention provides a noise reduction device, a gas water heater and a control method for a gas water heater, including a noise reduction structure. The noise reduction structure includes a sound absorption member. The sound absorption member includes a sound absorption structure and a housing. A cavity with one end open is formed inside the housing. The sound absorption structure is rotatably arranged inside the cavity. A sound absorption cavity is formed inside the sound absorption structure. Sound absorption holes are provided on the sound absorption structure, and the sound absorption holes communicate with the sound absorption cavity. It can effectively reduce noise.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and particularly to a noise reduction device, a gas water heater and a control method for a gas water heater. Background Art

[0002] Gas water heaters are widely recognized by consumers for their energy conservation and environmental protection advantages. However, the noise problem during the operation of gas water heaters is also disturbing. 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 solves one of the problems existing in the related art to a certain extent. For this reason, the purpose of the present invention is to provide a noise reduction device that can effectively reduce noise.

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

[0005] A noise reduction device includes a noise reduction structure. The noise reduction structure includes a sound absorption structure and a housing. A cavity with one end open is formed inside the housing. The sound absorption structure is rotatably arranged in the cavity, and sound absorption holes are provided on the sound absorption structure.

[0006] As a further improvement of the present invention, the sound absorption structure is a spherical structure, and the housing is a hemispherical structure. A hemispherical cavity with one end open is formed inside the hemispherical structure, and the sound absorption structure is arranged on the hemispherical cavity.

[0007] As a further improvement of the present invention, the spherical structure includes an upper hemisphere and a lower hemisphere. An internal sound absorption cavity is formed between the upper hemisphere and the lower hemisphere, and the sound absorption holes are arranged on the spherical surface of the upper hemisphere of the spherical structure.

[0008] As a further improvement of the present invention, the noise reduction structure further includes a rotating shaft. At least one sound absorption member is provided on the rotating shaft. A connection hole is provided on the housing. The rotating shaft passes through the connection hole and is connected to the sound absorption structure. The rotation of the rotating shaft can drive the sound absorption structure to rotate.

[0009] As a further improvement of the present invention, a motor is further included. The number of the noise reduction structures is one. The motor shaft of the motor is connected to the rotating shaft of the noise reduction structure to drive the rotation of the rotating shaft through the rotation of the motor shaft.

[0010] As a further improvement of the present invention, it further includes a motor. The number of the noise reduction structures is at least two. The number of the motors is multiple and the number of the motors is adapted to the number of the noise reduction structures. The rotating shafts of each of the noise reduction structures are respectively connected to the motor shafts of the motors; the number of the motors is one, and the rotating shaft of each of the noise reduction structures is connected to the motor shaft of the motor through a transmission structure.

[0011] As a further improvement of the present invention, the transmission structure includes a transmission belt. The motor shaft of the motor is connected to the rotating shaft of each of the noise reduction structures through the transmission belt.

[0012] As a further improvement of the present invention, the noise reduction device further includes a connecting piece. The connecting piece is installed on the rotating shaft and fixedly connected to the rotating shaft. A pulley groove is formed on the connecting piece. The pulley groove is used for connecting with the transmission belt. The transmission belt is connected to the rotating shaft through the connecting piece.

[0013] The purpose of the present invention is to provide a gas water heater that can effectively reduce noise.

[0014] The above object is achieved by the following technical solutions:

[0015] A gas water heater includes a burner, a sound wave sensor and a noise reduction device as described above. The sound wave sensor is arranged on the burner. The burner includes a burner head assembly. The noise reduction device is arranged below the burner head assembly.

[0016] As a further improvement of the present invention, it further includes a burner housing and a support structure. The noise reduction device is arranged at the bottom of the burner housing. The support structure is used to support the noise reduction device.

[0017] The purpose of the present invention is to provide a control method for a gas water heater that can effectively reduce noise.

[0018] The above object is achieved by the following technical solutions:

[0019] A control method for a gas water heater, which is applied to the above gas water heater, includes the following steps:

[0020] Step S101, detecting a sound wave signal and obtaining the peak frequency of the sound wave signal;

[0021] Step S102, determining the optimal rotation speed of the sound absorption structure according to the peak frequency of the sound wave signal.

[0022] As a further improvement of the present invention, in step S102, the method for determining the optimal rotation speed of the sound absorption structure according to the peak frequency of the sound wave signal is:

[0023] When there is a peak in the acoustic wave signal, the sound absorption holes of the sound absorption structure face the burner assembly; when there is a trough in the acoustic wave signal, the sound absorption holes of the sound absorption structure face the inner wall of the housing cavity.

[0024] As a further improvement of the present invention, after step S102, the following steps are further included:

[0025] Step S103, determine the optimal initial position of the sound absorption structure in the initial state.

[0026] As a further improvement of the present invention, the method for determining the initial position of the sound absorption structure in the initial state is as follows:

[0027] Step S1031, obtain the noise values when the sound absorption structure rotates one week at the optimal rotation speed at different initial positions;

[0028] Step S1032, compare the noise values at different initial positions, and determine the initial position corresponding to the lowest noise value as the optimal initial position.

[0029] As a further improvement of the present invention, after step S103, the following steps are further included:

[0030] Step S104, control the sound absorption structure to work at the optimal initial position and the optimal rotation speed;

[0031] Step S105, detect whether the power of the gas water heater changes;

[0032] If so, return to step S101; if not, return to step S104.

[0033] Compared with the prior art, the present invention has at least the following beneficial effects:

[0034] 1. The present invention proposes a noise reduction device, which can effectively reduce noise.

[0035] 2. The present invention proposes a gas water heater, which generates a relatively large noise on its burner. By setting the noise reduction device, the noise on the burner assembly can be absorbed to reduce the noise.

[0036] 3. The present invention proposes a control method for a gas water heater. By determining the optimal rotation speed of the sound absorption structure through the peak frequency of the acoustic wave signal, when the sound absorption structure rotates at the optimal rotation speed, it is ensured that when the acoustic wave signal appears at the peak frequency, the sound absorption holes on the sound absorption structure face the burner assembly to absorb sound energy; when the acoustic wave signal is at the trough frequency, the sound absorption holes on the sound absorption structure face the inner wall of the cavity. Ensure the sound absorption effect and ensure the noise reduction effect. Description of the Drawings

[0037] Figure 1Schematic structural diagram of the sound absorption component in the embodiment;

[0038] Figure 2 Exploded schematic diagram of the sound absorption component in the embodiment

[0039] Figure 3 Schematic structural diagram of the sound absorption structure in the embodiment;

[0040] Figure 4 Schematic structural diagram of the sound absorption component and the rotating shaft in the embodiment;

[0041] Figure 5 Schematic structural diagram of the noise reduction structure in the embodiment;

[0042] Figure 6 Schematic structural diagram of a noise reduction device in the embodiment;

[0043] Figure 7 Schematic structural diagram of the burner in the embodiment;

[0044] Figure 8 Flow chart of a control method for a gas water heater in the embodiment. Specific implementation manners

[0045] 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 making equivalent replacements for some technical features without departing from the spirit of the present invention scheme shall all be covered within the scope of the technical solution claimed by the present invention.

[0046] Embodiment 1:

[0047] See Figures 1-6 There is shown a noise reduction device 100, including a noise reduction structure 1. The noise reduction structure 1 includes a sound absorption component 2. The sound absorption component 2 includes a sound absorption structure 21 and a housing 22. A cavity 221 with one end open is formed inside the housing 22. The sound absorption structure 21 is rotatably arranged inside the cavity 221. A sound absorption cavity is formed inside the sound absorption structure 21. Sound absorption holes 211 are provided on the sound absorption structure 21, and the sound absorption holes 211 communicate with the sound absorption cavity.

[0048] The present invention provides a noise reduction device 100. An acoustic absorption hole 211 is provided on the acoustic absorption structure 21, and the acoustic absorption structure 21 is rotatably arranged in the cavity 221. When the acoustic absorption structure 21 rotates until the acoustic absorption hole 211 faces outward, that is, the acoustic absorption cavity communicates with the outside through the acoustic absorption hole 211 and the opening of the outer shell 22, external noise can enter the acoustic absorption cavity of the acoustic absorption structure 21 through the acoustic absorption hole 211. When the noise enters the acoustic absorption cavity, the acoustic absorption structure 21 rotates until the acoustic absorption hole 211 faces the inner wall of the cavity 221, so that the noise entering the acoustic absorption cavity cannot escape from the acoustic absorption hole 211, enabling the sound energy to be quickly consumed in the acoustic absorption cavity and reducing the noise.

[0049] The acoustic absorption structure 21 is a spherical structure, and the outer shell 22 is a hemispherical structure. A hemispherical cavity 221 with one end open is formed inside the hemispherical structure, and the acoustic absorption structure 21 is arranged on the hemispherical cavity 221.

[0050] The spherical structure includes an upper hemisphere and a lower hemisphere. An acoustic absorption cavity is formed inside between the upper hemisphere and the lower hemisphere, and the acoustic absorption hole 211 is arranged on the spherical surface of the upper hemisphere of the spherical structure.

[0051] The acoustic absorption hole 211 is on the spherical surface of the upper hemisphere and gradually decreases from the center of the spherical surface of the upper hemisphere to the peripheral edge of the spherical surface.

[0052] The inner diameter of the outer shell 22 is equal to or slightly larger than the outer diameter of the acoustic absorption structure 21.

[0053] The noise reduction structure 1 further includes a rotating shaft 3. At least one acoustic absorption member 2 is provided on the rotating shaft 3. A connection hole is provided on the outer shell 22. The rotating shaft 3 passes through the connection hole and is connected to the acoustic absorption structure 21. The rotation of the rotating shaft 3 can drive the rotation of the acoustic absorption structure 21.

[0054] Preferably, 4 - 10 acoustic absorption members 2 are provided on the rotating shaft 3. In this embodiment, 7 acoustic absorption members 2 are provided on the rotating shaft 3. A connection hole is provided on each outer shell 22. The connection hole includes a first connection hole and a second connection hole, and the first connection hole and the second connection hole are arranged opposite to each other. The rotating shaft 3 passes through the first connection hole and is connected to the acoustic absorption structure 21, and then passes through the second connection hole and is connected to the next acoustic absorption member 2. By providing multiple acoustic absorption members 2 on one rotating shaft 3, the multiple acoustic absorption members 2 can rotate synchronously and absorb sound together. They can rotate synchronously until the noise reduction structure 1 faces the outside to absorb sound, and after absorbing sound, they can also rotate synchronously until they face the inner wall of the cavity 221 to eliminate sound, achieving the purpose of reducing noise and improving the sound absorption efficiency.

[0055] In some embodiments, the noise reduction device 100 further includes a motor 4. The number of the noise reduction structures 1 is one. The motor shaft of the motor 4 is connected to the rotating shaft 3 of the noise reduction structure 1, so as to drive the rotation of the rotating shaft 3 by the rotation of the motor shaft of the motor 4.

[0056] In some embodiments, the noise reduction device 100 further includes a motor 4. The number of the noise reduction structures 1 is at least two. The number of the motors 4 is multiple and the number of the motors 4 is adapted to the number of the noise reduction structures 1. The rotating shaft 3 of each noise reduction structure 1 is respectively connected to the motor shaft of the motor 4. That is, when the number of the noise reduction structures 1 is two, which are the first noise reduction structure 1 and the second noise reduction structure 1 respectively, the number of the motors 4 is two, which are the first motor 4 and the second motor 4 respectively. The rotating shaft 3 of the first noise reduction structure 1 is connected to the motor shaft of the first motor 4, and the rotating shaft 3 of the second noise reduction structure 1 is connected to the motor shaft of the second motor 4.

[0057] In some embodiments, the number of the motors 4 is one. The rotating shaft 3 of each noise reduction structure 1 is connected to the motor shaft of the motor 4 through a transmission structure 5.

[0058] The transmission structure 5 includes a transmission belt. The motor shaft of the motor 4 is connected to the rotating shaft 3 of each noise reduction structure 1 through the transmission belt.

[0059] The noise reduction device 100 further includes a connector 7. The connector 7 is installed on the rotating shaft 3 and fixedly connected to the rotating shaft 3. A pulley groove is formed on the connector 7. The pulley groove is used for connecting with the transmission belt. The transmission belt is connected to the rotating shaft 3 through the connector 7.

[0060] The connector 7 is installed at the end of the rotating shaft 3. The connector 7 includes a connection body and a connection portion protruding from the side surface of the connection body. The connection portion is connected to the rotating shaft 3. A pulley groove is formed on the connection body. The pulley groove is used for connecting with the transmission belt. The motor shaft of the motor 4 rotates, and the motor shaft drives the rotation of the rotating shaft 3 of each noise reduction structure 1 through the transmission belt.

[0061] Embodiment Two:

[0062] Such as Figure 7 , a gas water heater includes a burner 101, a sound wave sensor and a noise reduction device 100 as described in Embodiment One. The sound wave sensor is arranged on the burner 101. The burner 101 includes a burner head assembly. The noise reduction device 100 is arranged below the burner head assembly.

[0063] It further includes a burner 101 housing and a support structure. The noise reduction device 100 is disposed at the bottom of the burner 101 housing, and the support structure is used to support the noise reduction device 100.

[0064] When the gas water heater is in use, a relatively large noise will be generated on its burner 101. By providing the noise reduction device 100, the noise on the burner assembly can be absorbed to reduce the noise.

[0065] Embodiment Three:

[0066] See Figure 8 , a control method for a gas water heater, which is applied to a gas water heater in Embodiment Two, and includes the following steps:

[0067] Step S101, detecting the acoustic signal and obtaining the peak frequency of the acoustic signal;

[0068] Step S102, determining the optimal rotation speed of the sound absorption structure based on the peak frequency of the acoustic signal.

[0069] During the use of the gas water heater, the generated acoustic signal has a peak frequency, a trough frequency, and a general frequency between the peak frequency and the trough frequency. One peak and one trough of the generated sound energy are set as one cycle.

[0070] Determine the optimal rotation speed of the sound absorption structure through the peak frequency of the acoustic signal, so that when the sound absorption structure rotates at the optimal rotation speed, it is ensured that when the acoustic signal appears at the peak frequency, the sound absorption holes on the sound absorption structure face the burner assembly to absorb the sound energy; when the acoustic signal is at the trough frequency, the sound absorption holes on the sound absorption structure face the inner wall of the cavity. Ensure the sound absorption effect and ensure the noise reduction effect.

[0071] Step S102, the method for determining the optimal rotation speed of the sound absorption structure based on the peak frequency of the acoustic signal is:

[0072] When the acoustic signal appears at a peak, the sound absorption holes of the sound absorption structure face the burner assembly; when the acoustic signal appears at a trough, the sound absorption holes of the sound absorption structure face the inner wall of the outer shell cavity.

[0073] Receive the sound energy when the acoustic signal is at the peak frequency, and then absorb the sound energy in the peak through the noise reduction device. When the acoustic signal is at the trough, the sound energy is small, and the sound energy at the trough can be ignored, so the sound absorption efficiency will be greatly improved, and the sound energy at the peak can be absorbed.

[0074] After step S102, the following steps are further included:

[0075] Step S103, determining the optimal initial position of the sound absorption structure in the initial state.

[0076] The sound absorption structure is rotatably arranged on the outer shell, and its rotation speed and initial position in the initial state both affect the absorption of sound energy. Reasonably setting the optimal initial position of the sound absorption structure in the initial state can ensure the sound absorption effect.

[0077] The method for determining the optimal initial position of the sound absorption structure in the initial state is as follows:

[0078] Step S1031: Obtain the noise values when the sound absorption structure rotates one week at the optimal rotation speed at different initial positions.

[0079] Step S1032: Compare the noise values at different initial positions, obtain the lowest noise value, and determine the initial position corresponding to the lowest noise value as the optimal initial position.

[0080] In step S1031, when the sound absorption structure rotates one week, it experiences one peak and one valley of the sound absorption structure.

[0081] In this embodiment, since the sound absorption structure is a spherical structure, the spherical structure includes an upper hemisphere and a lower hemisphere. An absorption cavity is formed inside between the upper hemisphere and the lower hemisphere, and the sound absorption holes are arranged on the spherical surface of the upper hemisphere of the spherical structure.

[0082] Set n initial positions, where n is 2 - 9. Set the first initial position as the upper hemisphere of the sound absorption holes of the sound absorption structure facing completely towards the inner wall of the cavity; on the premise of the first initial position, the sound absorption structure rotates clockwise by 180 / n degrees to be the second initial position; on the premise of the second initial position, the sound absorption structure rotates clockwise by 180 / n degrees to be the third initial position; and so on.

[0083] If n is 6, set the first initial position as the upper hemisphere of the sound absorption holes of the sound absorption structure facing completely towards the inner wall of the cavity; on the premise of the first initial position, the sound absorption structure rotates clockwise by 30° to be the second initial position; on the premise of the second initial position, the sound absorption structure rotates clockwise by 30° to be the third initial position; on the premise of the third initial position, the sound absorption structure rotates clockwise by 30° to be the fourth initial position; on the premise of the fourth initial position, the sound absorption structure rotates clockwise by 30° to be the fifth initial position; on the premise of the fifth initial position, the sound absorption structure rotates clockwise by 30° to be the sixth initial position.

[0084] Obtain the noise value outside when the sound-absorbing structure rotates one week with the initial position being the first initial position as the first noise value; when the initial position of the sound-absorbing structure is the second initial position and it rotates one week, the noise value outside is the second noise value; when the initial position of the sound-absorbing structure is the third initial position and it rotates one week, the noise value outside is the third noise value; when the initial position of the sound-absorbing structure is the fourth initial position and it rotates one week, the noise value outside is the fourth noise value; when the initial position of the sound-absorbing structure is the fifth initial position and it rotates one week, the noise value outside is the fifth noise value; when the initial position of the sound-absorbing structure is the sixth initial position and it rotates one week, the noise value outside is the sixth noise value. Compare the first noise value, the second noise value, the third noise value, the fourth noise value, the fifth noise value and the sixth noise value, and take the one with the lowest noise value as the lowest noise value, and determine the initial position corresponding to the lowest noise value as the optimal initial position.

[0085] After step S103, the following steps are further included:

[0086] Step S104, control the sound-absorbing structure to work at the optimal initial position and the optimal rotation speed;

[0087] Step S105, detect whether the power of the gas water heater changes;

[0088] If so, return to step S101; if not, return to step S104.

[0089] When the power of the gas water heater changes, that is, the peaks and valleys of the sound energy may change. Therefore, it is necessary to reset the optimal rotation speed and the optimal initial position of the sound-absorbing structure to ensure the noise reduction effect.

[0090] The above preferred embodiments should be regarded as illustrative examples of the implementation modes of the present application. Any technical deductions, substitutions, improvements, etc. that are identical, similar to or based on the present application should be regarded as within the protection scope of this patent.

Claims

1. A noise reduction device, characterized in that, it includes a noise reduction structure (1), the noise reduction structure (1) includes a sound absorption member (2), the sound absorption member (2) includes a sound absorption structure (21) and a housing (22), a cavity (221) with one end open is formed in the housing (22), the sound absorption structure (21) is rotatably arranged in the cavity (221), a sound absorption cavity is formed in the sound absorption structure (21), and sound absorption holes (211) are provided on the sound absorption structure (21), and the sound absorption holes (211) communicate with the sound absorption cavity; wherein, the sound absorption structure (21) is a spherical structure, the housing (22) is a hemispherical structure, a hemispherical cavity (221) with one end open is formed in the hemispherical structure, and the sound absorption structure (21) is arranged on the hemispherical cavity (221); the noise reduction structure (1) further includes a rotating shaft (3), at least one of the sound absorption members (2) is provided on the rotating shaft (3), a connection hole is provided on the housing (22), the rotating shaft (3) passes through the connection hole and is connected to the sound absorption structure (21), and the rotation of the rotating shaft (3) can drive the sound absorption structure (21) to rotate; when a wave peak appears in the sound wave signal, the sound absorption structure (21) rotates to make the sound absorption holes (211) face outwards, and the sound absorption cavity communicates with the outside through the sound absorption holes (211) and the opening of the housing (22), so that external noise enters the sound absorption cavity of the sound absorption structure (21) through the sound absorption holes (211); when the noise enters the sound absorption cavity and a wave valley appears in the sound wave signal, the sound absorption structure (21) rotates to make the sound absorption holes (211) face the inner wall of the cavity (221), so that the noise entering the sound absorption cavity cannot be transmitted out through the sound absorption holes (211).

2. A noise reduction device according to claim 1, characterized in that, the spherical structure includes an upper hemisphere and a lower hemisphere, the sound absorption cavity is formed inside between the upper hemisphere and the lower hemisphere, and the sound absorption holes (211) are arranged on the spherical surface of the upper hemisphere of the spherical structure.

3. A noise reduction device according to claim 1, characterized in that, it further includes a motor (4), the number of the noise reduction structures (1) is one, and the motor shaft of the motor (4) is connected to the rotating shaft (3) of the noise reduction structure (1) to drive the rotating shaft (3) to rotate through the rotation of the motor shaft of the motor (4).

4. A noise reduction device according to claim 1, characterized in that, it further includes a motor (4), the number of the noise reduction structures (1) is at least two, the number of the motors (4) is multiple, and the number of the motors (4) is adapted to the number of the noise reduction structures (1), and the rotating shaft (3) of each noise reduction structure (1) is respectively connected to the motor shaft of the motor (4); or the number of the motors (4) is one, and the rotating shaft (3) of each noise reduction structure (1) is connected to the motor shaft of the motor (4) through a transmission structure.

5. A noise reduction device according to claim 4, It is characterized in that the transmission structure includes a transmission belt, and the motor shaft of the motor (4) is connected to the rotating shaft (3) of each of the noise reduction structures (1) through the transmission belt.

6. A noise reduction device according to claim 5 It is characterized in that the noise reduction device further includes a connecting member (7), the connecting member (7) is installed on the rotating shaft (3) and fixedly connected to the rotating shaft (3), a wheel groove is formed on the connecting member (7), the wheel groove is used for connecting with the transmission belt, and the transmission belt is connected to the rotating shaft (3) through the connecting member (7).

7. A gas water heater It is characterized in that it includes a burner, a sound wave sensor and a noise reduction device according to any one of claims 1-6, the sound wave sensor is arranged on the burner, the burner includes a burner head assembly, and the noise reduction device is arranged below the burner head assembly; Determine the optimal rotation speed of the sound absorption structure through the peak frequency of the sound wave signal; Wherein, determining the optimal rotation speed of the sound absorption structure through the peak frequency of the sound wave signal specifically is: when a peak appears in the sound wave signal, the sound absorption holes of the sound absorption structure face the burner head assembly; when a trough appears in the sound wave signal, the sound absorption holes of the sound absorption structure face the inner wall of the outer shell cavity.

8. A gas water heater according to claim 7 It is characterized in that it further includes a burner housing and a support structure, the noise reduction device is arranged at the bottom of the burner housing, and the support structure is used to support the noise reduction device.

9. A control method for a gas water heater It is characterized in that applied to a gas water heater according to claim 7 or 8, and includes the following steps: Step S101, detect the sound wave signal and obtain the peak frequency of the sound wave signal; Step S102, determine the optimal rotation speed of the sound absorption structure through the peak frequency of the sound wave signal.

10. A control method for a gas water heater according to claim 9 It is characterized in that after step S102, the following steps are further included: Step S103, determine the optimal initial position of the sound absorption structure in the initial state.

11. A control method for a gas water heater according to claim 10 It is characterized in that the method for determining the initial position of the sound absorption structure in the initial state is: Step S1031, obtain the noise values of the sound absorption structure rotating one week at the optimal rotation speed at different initial positions; Step S1032, compare the noise values at different initial positions, and determine the initial position corresponding to the lowest noise value as the optimal initial position.

12. A control method for a gas water heater according to claim 10 or 11 It is characterized in that after step S103, the following steps are further included: Step S104, control the sound absorption structure to work at the optimal initial position and the optimal rotation speed; Step S105, detect whether the power of the gas water heater changes; If so, return to step S101; if not, return to step S104.

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