A noise elimination device, a noise control method and an air conditioner

Abstract

The application discloses a sound attenuation device, a noise control method and an air conditioner. The sound attenuation device is applied to the air conditioner, the air conditioner comprises an indoor heat exchanger, an outdoor heat exchanger, a four-way valve and a compressor, the inlet end of the sound attenuation device is communicated with the exhaust end of the compressor, the outlet end of the sound attenuation device is connected with the four-way valve, the sound attenuation device comprises at least two sound attenuation branches, one sound attenuator is arranged on each sound attenuation branch, and the connection relationship between different sound attenuators can be changed; and a controller is used for controlling the connection relationship between different sound attenuators in the sound attenuation device, thereby changing the sound attenuation parameters of the sound attenuation device and changing the sound attenuation volume of the sound attenuation device. According to the application, sound attenuation can be performed on noise of different frequencies, noise between the indoor part and the outdoor part of the air conditioner reaches noise requirements, and the experience of users is improved.

Description

Technical Field

[0001] This invention relates to the field of noise control technology, and more specifically, to a noise reduction device, a noise control method, and an air conditioner. Background Technology

[0002] With economic development, people have increasingly higher demands for quality of life. Air conditioners often require 20m, 50m, or even longer connecting pipes in many installations, necessitating the addition of refrigerant. Differences in the amount of refrigerant added lead to pressure variations in the air conditioning system, and individual compressor variations can cause the refrigerant pulsation unit to emit noise at different frequencies. Since it's difficult to test all noise issues during the development phase, air conditioners often produce unpleasant noise after installation. Current technology uses silencing devices to reduce noise, but these devices have fixed silencing parameters and can only reduce noise at specific frequencies or bands. However, the frequency of noise is uncertain, so the silencing effect is poor at frequencies other than the specific frequency.

[0003] There is currently no effective solution to the problem that the silencing parameters of the silencing devices in existing air conditioners are fixed and cannot be adjusted adaptively according to the noise frequency, resulting in poor silencing effect. Summary of the Invention

[0004] This invention provides a silencing device, a noise control method, and an air conditioner to solve the problem that the silencing parameters of the silencing device in the prior art are fixed and cannot be adjusted adaptively according to the noise frequency, resulting in poor silencing effect.

[0005] To solve the above-mentioned technical problems, the present invention provides a silencing device applied to an air conditioner. The air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a four-way valve, and a compressor. The silencing device has its inlet end connected to the exhaust end of the compressor and its outlet end connected to the four-way valve. The silencing device includes at least two silencing branches, and each silencing branch is provided with a corresponding silencer. The connection relationship between different silencers can be changed.

[0006] The controller is used to control the connection relationship between different mufflers in the muffler device, thereby changing the muffler parameters of the muffler device to change the muffler volume.

[0007] Furthermore, the noise reduction branch includes:

[0008] The first valve is installed on the inlet pipe of the silencer branch;

[0009] The second valve is installed on the outlet pipe of the silencing branch;

[0010] The third valve is installed between the outlet pipe of each silencer branch and the inlet pipe of any other silencer branch.

[0011] Furthermore, the third valve is a one-way valve.

[0012] Furthermore, the muffler includes:

[0013] Expansion chamber; its inlet end is connected to the inlet pipe of the silencing branch, and its outlet end is connected to the outlet pipe of the silencing branch;

[0014] The cross-sectional area of ​​the expansion chamber is greater than the cross-sectional area of ​​the inlet pipe of the silencing branch and the cross-sectional area of ​​the outlet pipe.

[0015] Furthermore, the silencing parameters include: equivalent expansion ratio and equivalent expansion chamber length;

[0016] Wherein, the equivalent expansion ratio is the equivalent value of the expansion ratio of all participating silencers; the expansion ratio is the ratio of the cross-sectional area of ​​the expansion chamber of the silencer to the cross-sectional area of ​​the inlet pipe; and the equivalent expansion chamber length is the total length of all participating silencers.

[0017] Furthermore, the expansion ratios of different mufflers in the silencing device are different.

[0018] The present invention also provides an air conditioner including the above-mentioned silencing device.

[0019] The present invention also provides a noise control method applied to the above-mentioned silencing device, the noise control method comprising:

[0020] After determining that the noise of the air conditioner does not meet the noise requirements, the connection relationship between the different silencers of the silencer device is changed sequentially.

[0021] The noise of the air conditioner is detected each time the connection relationship changes;

[0022] Once the noise level of the air conditioner reaches the required level, the connection relationship between the different silencers of the silencer device remains unchanged.

[0023] Furthermore, after determining that the noise level of the air conditioner does not meet the noise requirements, the method further includes:

[0024] Detect the noise frequency of the air conditioner;

[0025] The connection relationship between different silencers in the silencing device is changed according to the noise frequency so that the noise of the air conditioner meets the noise requirements.

[0026] Furthermore, by altering the connection relationship between different silencers in the silencing device according to the noise frequency, so that the noise of the air conditioner meets the noise requirements, including:

[0027] Determine the amount of noise reduction required to meet the noise requirements;

[0028] The silencing parameters of the silencing device are determined based on the noise frequency of the air conditioner and the silencing amount; wherein, the silencing parameters include the equivalent expansion ratio and the equivalent expansion chamber length;

[0029] The connection relationship between different mufflers is changed according to the silencing parameters.

[0030] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described noise control method.

[0031] The present invention also provides an electronic device, comprising:

[0032] One or more processors;

[0033] A storage device for storing one or more programs, which, when executed by one or more processors, cause the one or more processors to implement the noise control method described above.

[0034] The present invention provides a silencing device comprising at least two silencing branches, each branch corresponding to a silencer, the connection relationships between different silencers being variable. A controller controls the connection relationships between the different silencers in the silencing device, thereby changing the silencing parameters of the silencing device and thus altering its silencing volume. Since the silencing volume is related to the noise frequency, the length of the silencer's expansion chamber, and the silencer's expansion ratio, by changing the connection relationships between different silencers (i.e., connecting them in series, parallel, or series-parallel), the silencing parameters of the silencing device can be altered, thereby changing the silencing volume. This allows for silencing of noise at different frequencies, ensuring that the noise level between the indoor and outdoor sections of the air conditioner meets noise requirements and improving the user experience. Attached Figure Description

[0035] Figure 1 This is a structural diagram of an air conditioner according to an embodiment of the present invention;

[0036] Figure 2 This is a structural diagram of a silencing device according to an embodiment of the present invention;

[0037] Figure 3 This is a structural diagram of a silencing device according to another embodiment of the present invention;

[0038] Figure 4 This is a diagram showing the internal structure of a muffler according to an embodiment of the present invention;

[0039] Figure 5 A flowchart of a noise control method according to an embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0042] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0043] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0044] It should be understood that although the terms first, second, third, etc., may be used to describe valves in the embodiments of the present invention, these valves should not be limited to these terms. These terms are only used to distinguish valves located in different positions. For example, without departing from the scope of the embodiments of the present invention, a first valve may also be referred to as a second valve, and similarly, a second valve may also be referred to as a first valve.

[0045] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0046] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0047] The optional embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0048] Example 1

[0049] After an air conditioner is installed in a customer's home, it often produces unpleasant noise. In existing technology, noise is reduced by setting up a silencing device. However, the silencing parameters of the silencing device are fixed, and it can only reduce noise at a certain frequency or frequency band. But the frequency of the noise is uncertain, so the silencing effect is poor at frequencies other than the specific frequency.

[0050] To address the problem that existing silencing devices in air conditioners have fixed silencing parameters that cannot be adaptively adjusted according to noise frequency, resulting in poor silencing performance, this embodiment provides a silencing device for use in air conditioners. Figure 1 A structural diagram of an air conditioner according to an embodiment of the present invention is shown below. Figure 1 As shown, the air conditioner includes an indoor heat exchanger 1, an outdoor heat exchanger (not shown in the figure, but a component connecting the large and small valves), a four-way valve 4, and a compressor 3. The indoor heat exchanger is connected to the outdoor heat exchanger via a throttling valve 2. The outdoor heat exchanger is connected to the first port E of the four-way valve. The second port S of the four-way valve is connected to the suction end of the compressor. The third port C of the low-pass valve is connected to the indoor heat exchanger. The fourth port D of the four-way valve is connected to the discharge end of the compressor. A silencer is installed between the four-way valve and the compressor's discharge port, with its inlet connected to the compressor's discharge end and its outlet connected to the four-way valve.

[0051] Figure 2 This is a structural diagram of a silencing device according to an embodiment of the present invention, as shown below. Figure 2 As shown, the silencing device includes at least two silencing branches. Figure 2 Taking three silencing branches as an example, in practical applications, at least two silencing branches are sufficient. Each silencing branch is equipped with a corresponding muffler, and the connection relationship between different mufflers can be changed; the controller (not shown in the figure) is used to control the connection relationship between different mufflers in the silencing device, thereby changing the silencing parameters of the silencing device to change the silencing volume of the silencing device.

[0052] The silencing device in this embodiment includes at least two silencing branches, each with a corresponding silencer. The connection relationship between different silencers can be changed. A controller controls the connection relationship between the different silencers in the silencing device, thereby changing the silencing parameters and thus the silencing volume. Since the silencing volume is related to the noise frequency, the length of the silencer's expansion chamber, and the silencer's expansion ratio, the silencing parameters of the silencing device can be changed by altering the connection relationship between different silencers—that is, by connecting them in series, in parallel, or in a series-parallel configuration—based on different noise frequencies. This changes the silencing volume, allowing for silencing of noise at different frequencies, ensuring that the noise level between the indoor and outdoor sections of the air conditioner meets noise requirements, and improving the user experience.

[0053] like Figure 2 As shown, in order to achieve more connection relationships such as series, parallel, and series-parallel connections, each silencer branch includes: a first valve, which is installed on the inlet pipe of each silencer branch; a second valve, which is installed on the outlet pipe of each silencer branch; and a third valve, which is installed between the outlet pipe of each silencer branch and the inlet pipe of any other silencer branch.

[0054] For ease of description, the above-mentioned Figure 2 The first valves of the three silencer branches are labeled as control valve 21, control valve 22, and control valve 23, respectively. The second valves of the three silencer branches are labeled as control valve 24, control valve 25, and control valve 26, respectively. The two third valves are named control valve 27 and control valve 28, respectively.

[0055] like Figure 2 As shown, the three silencing branches, from left to right, are the first silencing branch, the second silencing branch, and the third silencing branch, corresponding to the first, second, and third silencers, respectively. When control valves 23, 24, 27, and 28 are open, and control valves 21, 22, 25, and 26 are closed, the three silencers can be connected in series. When control valves 22, 24, and 27 are open, and control valves 21, 23, 25, 26, and 28 are closed, the first and second silencers can be connected in series. When control valves 23, 25, and 28 are open, and control valves 21, 22, 24, 26, and 27 are closed, the second and third silencers can be connected in series.

[0056] When control valves 21, 22, 23, 24, 25, and 26 are all open, and control valves 27 and 28 are closed, three silencers can be connected in parallel.

[0057] When control valves 21, 22, 24, and 25 are open and control valves 23, 26, 27, and 28 are closed, the first and second silencers can be connected in parallel.

[0058] When control valves 22, 23, 25, and 26 are open and control valves 21, 24, 27, and 28 are closed, the second and third silencers can be connected in parallel.

[0059] Multiple mufflers connected in series or in parallel can change the muffler expansion ratio, thus eliminating noise at different frequencies.

[0060] For example, in the development of a certain air conditioner product, without a silencer in the outdoor unit's piping, the outdoor unit's frequency spectrum exhibited two distinct noise peaks: around 100Hz and 600Hz. These high peaks resulted in a poor user experience. According to the formula mentioned above, the silencing frequency depends on the length and expansion ratio of the silencer's expansion chamber. If a silencer is installed, it can only eliminate either 100Hz or 600Hz, and cannot completely eliminate the noise.

[0061] The silencing device of this invention is assembled in the outdoor unit using a fixed box. The inlet end is connected to the compressor exhaust port, and the outlet end is connected to a four-way valve. For example, the first silencer (inlet pipe diameter r1 = 5mm, expansion chamber diameter r2 = 25mm, expansion chamber length L = 200mm) can eliminate 100-150Hz noise, the second silencer (inlet pipe diameter r1 = 5mm, expansion chamber diameter r2 = 40mm, expansion chamber length L = 120mm) can eliminate 200-250Hz, and the third silencer (inlet pipe diameter r1 = 5mm, expansion chamber diameter r2 = 50mm, expansion chamber length L = 100mm) can eliminate 500-600Hz. The control valve acts as an on / off switch. By adjusting the control valve and the single-phase valve, any two or three of the first, second, and third silencers can be connected in series or in parallel, allowing for various combinations to eliminate noise in multiple frequency ranges.

[0062] Figure 3 The diagram shows the structure of a muffler according to another embodiment of the present invention. The function of the third valve is to connect different mufflers in series. The third valve can be an electronic valve, controlled by a controller. However, electronic valves are relatively expensive, and if there are many muffler branches, controlling the third valve requires a large amount of controller resources. To solve this problem and simultaneously achieve the effect of connecting the mufflers in series, as shown in the diagram... Figure 3 As shown, the third valve is a one-way valve.

[0063] For ease of description, the above-mentioned Figure 3 The first valves of the three silencer branches are labeled as control valve 31, control valve 32, and control valve 33, respectively. The second valves of the three silencer branches are labeled as control valve 34, control valve 35, and control valve 36, respectively. The two check valves are named first check valve 37 and second check valve 38, respectively.

[0064] like Figure 3 As shown, the three silencing branches, from left to right, are the first silencing branch, the second silencing branch, and the third silencing branch, corresponding to the first, second, and third silencers, respectively. When control valves 33 and 34 are open and control valves 31, 32, 35, and 36 are closed, refrigerant flows through both the first one-way valve 37 and the second one-way valve 38, allowing the three silencers to be connected in series. When control valves 32 and 34 are open and control valves 31, 33, 35, and 36 are closed, refrigerant flows through the first one-way valve 37, allowing the first and second silencers to be connected in series. When control valves 33 and 35 are open and control valves 31, 32, 34, and 36 are closed, the second and third silencers can be connected in series, with refrigerant flowing through the second one-way valve 38.

[0065] When control valves 31, 32, 33, 34, 35, and 36 are all open, refrigerant flows through both the first check valve 37 and the second check valve 38, enabling the three silencers to be connected in series and parallel. That is, a portion of the refrigerant passes through the three silencers in sequence, and for this portion of the refrigerant, the three silencers are connected in series. Another portion of the refrigerant passes through two silencers in sequence, and for this portion of the refrigerant, the two silencers are connected in series. For another portion of the refrigerant, it is divided into three branches that flow through the three silencers respectively, and for this portion of the refrigerant, the three silencers are connected in parallel.

[0066] When control valves 31, 32, 34, and 35 are open and control valves 33 and 36 are closed, refrigerant flows through the first one-way valve 37, enabling the series-parallel connection of the first and second silencers. That is, after the refrigerant passes through the second silencer, a portion of it enters the second silencer, and for this portion of refrigerant, the connection between the first and second silencers is in series; the other portion of the refrigerant enters the first and second silencers separately, and for this portion of refrigerant, the connection between the first and second silencers is in parallel.

[0067] When control valves 32, 33, 35, and 36 are open and control valves 31 and 34 are closed, refrigerant flows through the second one-way valve 38, enabling the second and third mufflers to be connected in series and parallel. After passing through the third muffler, part of the refrigerant enters the third muffler, and for this part of the refrigerant, the connection between the third and second mufflers is in series; the other part of the refrigerant enters the third and second mufflers separately, and for this part of the refrigerant, the connection between the third and second mufflers is in parallel.

[0068] Multiple mufflers connected in series or in parallel can change the muffler expansion ratio, thus eliminating noise at different frequencies.

[0069] Figure 4This is a diagram illustrating the internal structure of a silencer according to an embodiment of the present invention. Since noise is generated by the flow of refrigerant, it propagates through the pipes in the direction of refrigerant flow. If the diameter of the pipes suddenly increases, some frequency sound waves are reflected and cannot continue to propagate through the pipes, thus achieving noise reduction. Therefore, in order to eliminate noise at certain frequencies, such as… Figure 4 As shown, the above-mentioned silencer includes: an expansion chamber; its inlet end is connected to the inlet pipe of the silencer branch, and its outlet end is connected to the outlet pipe of the silencer branch; wherein, the cross-sectional area of ​​the expansion chamber is larger than the cross-sectional area of ​​the inlet pipe of the silencer branch and the cross-sectional area of ​​the outlet pipe.

[0070] The cross-sectional area of ​​the connecting pipe is S1; the cross-sectional area of ​​the expansion type is S2; the effective length of the silencer expansion chamber is L; and the theoretical silencer volume Δl follows the following calculation formula:

[0071]

[0072] In the formula, m is the expansion ratio, which is equal to the ratio of the cross-sectional area of ​​the expansion chamber to the cross-sectional area of ​​the inlet pipe, i.e., S2 / S1; k is the sound wave number, and k=2πf / c. f is the silencing frequency, and c is the sound velocity propagating in the medium.

[0073] As shown in the formula above, in addition to the noise frequency, the silencer's structural parameters also affect its noise reduction effect, including the expansion ratio and expansion chamber length. The expansion ratio is the ratio of the cross-sectional area of ​​the silencer's expansion chamber to the cross-sectional area of ​​the inlet pipe. If multiple silencers are connected in series, parallel, or series-parallel, the noise reduction effect is related to the parameters of the silencing device composed of these silencers. These parameters include the equivalent expansion ratio and the equivalent expansion chamber length. The equivalent expansion ratio is the equivalent value of the expansion ratios of all participating silencers; the equivalent expansion chamber length is the total length of all participating silencers.

[0074] Assume one silencer has an expansion chamber length of L1, a cross-sectional area of ​​S2, and an inlet pipe cross-sectional area of ​​S1, with an expansion ratio of m1 = S2 / S1. Another silencer has an expansion chamber length of L2, a cross-sectional area of ​​S4, and an inlet pipe cross-sectional area of ​​S3, with an expansion ratio of m2 = S4 / S3. If these two silencers are connected in series, it's equivalent to increasing the length of the silencers, with the equivalent expansion chamber length being the total length of both silencers: L1 + L2. If these two silencers are connected in parallel, it's equivalent to increasing the cross-sectional area of ​​both the inlet pipe and the expansion chamber, with an equivalent expansion ratio of m3 = (S2 + S4) / (S1 + S3).

[0075] According to the formula above, on the one hand, since the volume reduction is positively correlated with the expansion chamber length within a certain range, in some embodiments of the present invention, the volume reduction of the muffler can be increased by connecting different mufflers in series to increase the equivalent expansion chamber length. On the other hand, since the volume reduction is positively correlated with the expansion ratio within a certain range, in some embodiments of the present invention, the volume reduction of the muffler can be increased by connecting different mufflers in parallel to increase the equivalent expansion chamber length. However, if the expansion ratios of the different mufflers connected in parallel are the same, for example, S4 / S3 = S2 / S1 as mentioned above, then the equivalent expansion ratio after the two mufflers are connected in parallel is m3 = (S2+S4) / (S1+S3) = S4 / S3 = S2 / S1, that is, m3 = m2 = m1. The equivalent expansion ratio of the two mufflers connected in parallel is the same as the expansion ratio of a single muffler, and will not change the volume reduction. Therefore, if it is necessary to ensure that the equivalent expansion ratio changes after the different mufflers are connected in parallel, it is necessary to ensure that the expansion ratios of the different mufflers are different. Therefore, the expansion ratios of the different mufflers in the muffler device are set to be different.

[0076] Example 2

[0077] This embodiment provides an air conditioner including the silencing device described in the above embodiment, which is used to change the connection relationship between different silencers, that is, to connect different silencers in series, in parallel, or in a series-parallel connection. By changing the connection relationship of different silencers, the silencing parameters of the silencing device can be changed, thereby changing the silencing volume, so that the noise between the indoor and outdoor parts of the air conditioner meets the noise requirements and improves the user experience.

[0078] Example 3

[0079] This embodiment provides a noise control method applied to the silencing device described in the above embodiment. Figure 5 A flowchart of a noise control method according to an embodiment of the present invention is shown below. Figure 5 As shown, the noise control method includes:

[0080] S101, after determining that the noise of the air conditioner does not meet the noise requirements, the connection relationship between the different silencers of the silencer device is changed sequentially.

[0081] S102, detects the noise of the air conditioner each time the connection relationship changes.

[0082] S103, after the noise of the air conditioner reaches the noise requirement, the connection relationship between the different silencers of the silencer device remains unchanged.

[0083] After installing the silencer box module on the outdoor unit of the air conditioner, power it on. The air conditioner will enter test mode (by default, control valves one and four in the silencer device are open, while other control valves are closed. The refrigerant will enter the four-way valve after passing through the first silencer and will not pass through other silencers). The unit will start frequency sweeping, slowly increasing the frequency from low to high. At this time, you can experience the noise of the outdoor and indoor units to confirm the sound quality of the unit. If there is poor noise in the indoor or outdoor unit during the experience, you can use the control valves to make the three silencers operate in parallel, in series, or individually, etc., to eliminate the noise of the unit. When the noise meets the requirements, the debugged program will be rewritten into the air conditioner and fixed. When the unit is turned on again, it will operate according to the new program.

[0084] The noise control method in this embodiment, after determining that the noise of the air conditioner does not meet the noise requirements, controls the connection relationship between different silencers of the silencing device to change sequentially. After each change in the connection relationship, the noise of the air conditioner is detected. Once the noise of the air conditioner meets the noise requirements, the connection relationship between the different silencers of the silencing device is kept unchanged. Compared with ordinary air conditioners, this method can quickly solve the noise problem and improve the user experience.

[0085] After determining that the air conditioner is making a lot of noise, you can perform a frequency sweep according to the steps above. However, this process requires constantly switching the connection relationship between different silencers, which is still time-consuming. In order to further improve the noise reduction efficiency, after determining that the noise of the air conditioner does not meet the noise requirements, the above method also includes: detecting the noise frequency of the air conditioner; changing the connection relationship between different silencers of the silencing device according to the noise frequency so that the noise of the air conditioner meets the noise requirements.

[0086] Specifically, changing the connection relationship between different silencers in the silencing device according to the noise frequency to make the air conditioner's noise level meet the noise requirements includes:

[0087] Determine the required noise reduction amount to meet the noise requirements to ensure that the requirements are ultimately met; then, based on the formula mentioned above... The silencing parameters of the silencer device, namely the equivalent expansion ratio m and the equivalent expansion chamber length L, are determined based on the noise frequency and silencing amount of the air conditioner. The connection relationship between different silencers is changed according to the silencing parameters. In specific implementation, the equivalent expansion chamber length L can be determined first, then the equivalent expansion ratio m required to achieve the target silencing amount can be calculated. Then, based on the expansion ratio of the currently operating silencer and the expansion ratio data of all silencers, it can be determined which silencers(s) participate in parallel operation, and then the corresponding control valves are opened. Alternatively, the equivalent expansion ratio m can be determined first, then the equivalent expansion chamber length L required to achieve the target silencing amount can be calculated. Then, based on the expansion chamber length L of the currently operating silencer and the expansion chamber length data of all silencers, it can be determined which silencers(s) participate in series operation, and then the corresponding control valves are opened. The equivalent expansion chamber length L and the equivalent expansion ratio m can also be adjusted synchronously.

[0088] Example 4

[0089] This embodiment provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the noise control method of the above embodiment.

[0090] Example 5

[0091] This embodiment provides an electronic device, including:

[0092] One or more processors;

[0093] A storage device for storing one or more programs, which, when executed by one or more processors, cause the one or more processors to implement the noise control method of the above embodiments.

[0094] Figure 6 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention, such as... Figure 6 As shown, the device includes:

[0095] One or more processors 610 and memory 620, Figure 6 Take the 610 processor as an example.

[0096] The noise control method device may also include: an input device 630 and an output device 640.

[0097] The processor 610, memory 620, input device 630, and output device 640 can be connected via a bus or other means. Figure 6 Taking the example of a connection between China and Israel via a bus.

[0098] The memory 620, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the noise control method in this embodiment of the invention. The processor 610 executes various functional applications and data processing of the server by running the non-volatile software programs, instructions, and modules stored in the memory 620, thereby implementing the above-described method embodiments.

[0099] The memory 620 may include a program storage area and a data storage area, wherein the program storage area may store application programs required for operating the device and at least one function; and the data storage area may store data created based on the use of the noise control method, etc. Furthermore, the memory 620 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0100] Input device 630 can receive input digital or character information, and generate key signal inputs related to user settings and function control of the electronic device. Output device 640 may include display devices such as a display screen.

[0101] The one or more modules are stored in the memory 620, and when executed by the one or more processors 610, they execute the noise control method in any of the above method embodiments.

[0102] The above-described product can execute the method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the method provided in the embodiments of the present invention.

[0103] The electronic devices of this invention exist in various forms, including but not limited to:

[0104] (1) Mobile communication devices: These devices are characterized by their mobile communication capabilities and primarily aim to provide voice and data communication. These terminals include: smartphones (e.g., iPhones), multimedia phones, feature phones, and low-end phones, etc.

[0105] (2) Ultra-mobile personal computer devices: These devices fall under the category of personal computers, possessing computing and processing capabilities, and generally also have mobile internet access features. These terminals include PDAs, MIDs, and UMPCs, such as the iPad.

[0106] (3) Portable entertainment devices: These devices can display and play multimedia content. This category includes audio and video players (such as iPods), handheld game consoles, e-book readers, as well as smart toys and portable car navigation devices.

[0107] (4) Server: A device that provides computing services. The components of a server include a processor, hard disk, memory, device bus, etc. Servers are similar to general computer architectures, but because they need to provide highly reliable services, they have higher requirements in terms of processing power, stability, reliability, security, scalability, and manageability.

[0108] (5) Other electronic devices with data interaction functions, such as televisions and in-vehicle screens.

[0109] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A noise reduction device applied to an air conditioner, the air conditioner comprising an indoor heat exchanger, an outdoor heat exchanger, a four-way valve, and a compressor, characterized in that, The silencing device has its inlet end connected to the exhaust end of the compressor and its outlet end connected to the four-way valve. The silencing device includes at least two silencing branches, each with a corresponding silencer. The connection relationship between different silencers can be changed. The silencer includes an expansion chamber, its inlet end connected to the inlet pipe of the silencing branch, and its outlet end connected to the outlet pipe of the silencing branch. A controller is used to control the connection relationship between different silencers in the silencing device, thereby changing the silencing parameters of the silencing device to change the silencing volume of the silencing device; the controller is specifically used to: determine the silencing volume required to achieve the noise requirement; determine the silencing parameters of the silencing device according to the noise frequency of the air conditioner and the silencing volume; and change the connection relationship between different silencers according to the silencing parameters; The silencing parameters include: equivalent expansion ratio and equivalent expansion chamber length; Wherein, the equivalent expansion ratio is the equivalent value of the expansion ratio of all participating silencers; the expansion ratio is the ratio of the cross-sectional area of ​​the expansion chamber of the silencer to the cross-sectional area of ​​the inlet pipe; and the equivalent expansion chamber length is the total length of all participating silencers.

2. The silencing device according to claim 1, characterized in that, The noise reduction branch includes: The first valve is installed on the inlet pipe of the silencer branch; The second valve is installed on the outlet pipe of the silencing branch; The third valve is installed between the outlet pipe of each silencer branch and the inlet pipe of any other silencer branch.

3. The silencing device according to claim 2, characterized in that, The third valve is a one-way valve.

4. The silencing device according to claim 2, characterized in that, The cross-sectional area of ​​the expansion chamber is greater than the cross-sectional area of ​​the inlet pipe of the silencing branch and the cross-sectional area of ​​the outlet pipe.

5. The silencing device according to claim 1, characterized in that, The expansion ratios of different silencers in the silencing device are different.

6. An air conditioner, characterized in that, The silencing device includes any one of claims 1 to 5.

7. A noise control method, applied to the silencing device according to any one of claims 1 to 5, characterized in that, The method includes: After determining that the noise of the air conditioner does not meet the noise requirements, the connection relationship between the different silencers of the silencer device is changed sequentially. The noise of the air conditioner is detected each time the connection relationship changes; After the noise of the air conditioner reaches the noise requirement, the connection relationship between the different silencers of the silencer device remains unchanged. After determining that the noise level of the air conditioner does not meet the noise requirements, the method further includes: Detect the noise frequency of the air conditioner; Determine the noise reduction level required to meet the noise requirements; The silencing parameters of the silencing device are determined based on the noise frequency of the air conditioner and the silencing volume; wherein, the silencing parameters include the equivalent expansion ratio and the equivalent expansion chamber length; The connection relationship between different mufflers is changed according to the silencing parameters.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in claim 7.

9. An electronic device, characterized in that, include: One or more processors; A storage device for storing one or more programs, which, when executed by the one or more processors, cause the one or more processors to perform the method as described in claim 7.

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