A variable frequency device noise reduction control method and device and variable frequency device

Abstract

The application provides a variable frequency device noise reduction control method and device and a variable frequency device. The method detects a current noise value of the variable frequency device, reads a target temperature value set by a user, controls the number of variable frequency devices turned on and the running frequency of the variable frequency devices according to the noise value and the target temperature value, controls the noise value by controlling the number of variable frequency devices turned on and the running frequency of the variable frequency devices, and is free of dependence on sound absorption materials and structures. The noise generated when the variable frequency device operates is maximally reduced without changing the existing structure and materials of the variable frequency device.

Description

Technical Field

[0001] This invention relates to the field of power electronics technology, specifically to a noise reduction control method, device, and frequency converter. Background Technology

[0002] In air conditioning units, the noise from the compressor during operation can interfere with and affect the working environment, and can also harm human health. Therefore, it is necessary to reduce the noise of the compressor.

[0003] In existing technologies, sound-absorbing foam or dampers are often used to reduce the noise generated during compressor operation. This method relies on materials and structure to eliminate noise, which increases costs and makes subsequent maintenance more complicated. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a method, device and equipment for noise reduction control of variable frequency equipment, so as to solve the technical problems in the related technology where noise elimination of variable frequency equipment depends on materials and structure, which increases costs and makes subsequent maintenance more complicated.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] According to a first aspect of the present invention, a noise reduction control method for frequency converter equipment is provided, comprising:

[0007] Determine the number of frequency converters in the frequency conversion equipment;

[0008] Detect the current noise level of the frequency converter and read the target temperature value set by the user;

[0009] Based on the noise level and target temperature, control the number of frequency converters turned on and their operating frequency.

[0010] Preferably, controlling the number of inverters activated and the operating frequency based on the noise value and the target temperature value includes:

[0011] In normal mode, the target frequency corresponding to the variable frequency device meeting different target temperature values ​​is recorded;

[0012] In silent mode, the target frequency is obtained based on the user-defined target temperature value;

[0013] The target frequency is sent to the cloud server so that the cloud server returns a frequency combination at the target frequency.

[0014] Based on the frequency combination, control the number of frequency converters turned on and the operating frequency of each frequency converter.

[0015] Preferably, the control method further includes:

[0016] If the cloud server does not provide feedback, record the minimum noise value corresponding to the minimum operating frequency of a single inverter, and then control the single inverter to gradually increase the frequency according to the preset amplitude.

[0017] During the frequency increase process, the current noise level of the frequency converter is monitored in real time.

[0018] When the current noise value reaches an integer multiple N of the minimum noise value, calculate the growth factor M of the current frequency compared to the minimum operating frequency. If M≥N, control the frequency of a single frequency converter to increase; otherwise, start the next frequency converter. N is a positive integer and M≥1.

[0019] Repeat the judgment until the sum of the current frequencies is within a preset range around the target frequency, and then upload the frequency combination and corresponding noise value at the current target frequency to the cloud server.

[0020] Preferably, the control method further includes:

[0021] If the next inverter is turned on, the operating frequency of the previously running inverter will be reduced by half to the minimum operating frequency, and the newly turned-on inverter will be controlled to gradually increase the frequency by a preset amount.

[0022] During the frequency increase process, the current noise level of the frequency converter is monitored in real time.

[0023] When the current noise value reaches an integer multiple N of the minimum noise value, calculate the growth factor M of the current frequency compared to the minimum operating frequency. If M≥N, control the newly activated frequency converter to increase its frequency; otherwise, activate the next frequency converter. N is a positive integer and M≥1.

[0024] Repeat the judgment until the sum of the current frequencies is within a preset range around the target frequency, and then upload the frequency combination and corresponding noise value at the current target frequency to the cloud server.

[0025] Preferably, the control method further includes:

[0026] If all frequency converters are turned on, but the sum of the current frequencies is still less than the target frequency, the frequency converters other than the one with the highest frequency will be boosted one by one in order of frequency from low to high until the sum of the current frequencies is within the preset range around the target frequency.

[0027] Preferably, the control method further includes:

[0028] If the current total frequency is within a preset range around the target frequency, the current target frequency, the corresponding frequency combination and noise value are sent to the cloud server. The cloud server then compares the noise value at the currently uploaded target frequency with the noise value at the same target frequency stored in its own database. If the noise value is lower, the cloud server updates the frequency combination and noise value at the target frequency stored in its own database with the currently uploaded frequency combination and noise value.

[0029] Preferably, the control method further includes:

[0030] Store the current target frequency, the frequency combination and noise value corresponding to the target frequency, when the sum of the current frequencies is within a preset range around the target frequency;

[0031] When entering silent mode again, the frequency combination under the target frequency is obtained from the cloud server. If there is no feedback from the cloud server, the frequency combination that is the same as or close to the target frequency is searched in the local database, and the number of inverters turned on and the operating frequency are controlled according to the corresponding frequency combination.

[0032] According to a second aspect of the present invention, a noise reduction control device for frequency converter equipment is provided, comprising:

[0033] The determination module is used to determine the number of frequency converters in the frequency conversion equipment;

[0034] The detection module is used to detect the current noise level of the frequency converter and read the target temperature value set by the user.

[0035] The control module is used to control the number of inverters turned on and the operating frequency based on the noise value and the target temperature value.

[0036] According to a third aspect of the present invention, a frequency converter is provided, comprising:

[0037] The processor, communication interface, memory, and communication bus are connected, with the processor, communication interface, and memory communicating with each other via the communication bus.

[0038] Memory, used to store computer programs;

[0039] The processor implements the above method when executing programs stored in memory.

[0040] Preferably, the frequency converter is one of the following:

[0041] Inverter air conditioners, inverter refrigerators, inverter washing machines, and inverter fresh air systems.

[0042] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0043] By detecting the current noise level of the frequency converter and reading the target temperature value set by the user, the number of frequency converters turned on and the operating frequency are controlled according to the noise level and the target temperature value. The noise level is controlled by controlling the number of frequency converters turned on and the operating frequency, thus eliminating the dependence on sound-absorbing materials and structures. Without changing the existing structure and materials of the frequency converter, the noise generated by the frequency converter during operation is reduced to the maximum extent. Attached Figure Description

[0044] Figure 1 This is a flowchart illustrating a noise reduction control method for frequency converter equipment according to an embodiment of the present invention;

[0045] Figure 2 This is a schematic block diagram of a noise reduction control device for frequency converter equipment, as shown in an embodiment of the present invention. Detailed Implementation

[0046] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0047] Example 1

[0048] Figure 1 This is a flowchart illustrating a noise reduction control method for frequency converter equipment according to an exemplary embodiment of the present invention. See also... Figure 1 The method includes:

[0049] Step S11: Determine the number of frequency converters in the frequency conversion equipment;

[0050] Step S12: Detect the current noise level of the frequency converter and read the target temperature value set by the user;

[0051] Step S13: Based on the noise value and target temperature value, control the number of frequency converters turned on and the operating frequency.

[0052] It should be noted that the technical solution provided in this embodiment, in practice, is implemented in the controller of the variable frequency device, or in an electronic device connected to the controller. The variable frequency device includes, but is not limited to: variable frequency air conditioners, variable frequency refrigerators, variable frequency washing machines, and variable frequency fresh air systems.

[0053] It is understood that the technical solution provided in this embodiment detects the current noise value of the frequency converter and reads the target temperature value set by the user. Based on the noise value and the target temperature value, it controls the number of frequency converters turned on and the operating frequency. By controlling the number of frequency converters turned on and the operating frequency, the noise level is controlled. This eliminates the dependence on sound-absorbing materials and structures, and minimizes the noise generated by the frequency converter during operation without changing the existing structure and materials of the frequency converter.

[0054] In practice, determining the number of frequency converters in the frequency conversion equipment in step S11 is specifically as follows:

[0055] Read the ID number of the frequency converter and identify the model of the frequency converter based on the ID number;

[0056] Determine the number of frequency converters in the frequency conversion equipment based on its model.

[0057] In practice, step S13, based on the noise level and target temperature, controls the number of inverters activated and their operating frequency, including:

[0058] In normal mode, the target frequency corresponding to the variable frequency device meeting different target temperature values ​​is recorded;

[0059] In silent mode, the target frequency is obtained based on the user-defined target temperature value;

[0060] The target frequency is sent to the cloud server so that the cloud server returns a frequency combination at the target frequency.

[0061] Based on the frequency combination, control the number of frequency converters turned on and the operating frequency of each frequency converter.

[0062] For example, if the user sets a target temperature of 20℃, in normal mode, to achieve 20℃, the inverter frequency needs to be turned on to 100MHz (if multiple inverters are turned on, the sum of their frequencies is 100MHz). Therefore, the local database would record: Target temperature 20℃ -- Target frequency 100MHz. Simultaneously, the cloud server might record: In silent mode: Target frequency 100MHz -- Frequency combination: Inverter 1 - 20MHz, Inverter 2 - 40MHz, Inverter 3 - 40MHz.

[0063] Similarly, if the user sets a target temperature of 26℃, in normal mode, to achieve 26℃, the inverter frequency needs to be turned on to 120MHz (if multiple inverters are turned on, the total frequency of all inverters is 120MHz). Therefore, the local database will record: Target temperature 26℃ -- Target frequency 120MHz. Meanwhile, the cloud server may record: In silent mode: Target frequency 120MHz -- Frequency combination: Inverter 1-30MHz, Inverter 2-40MHz, Inverter 3-50MHz, ... and so on.

[0064] Therefore, the target frequency corresponding to the recording frequency converter meeting different target temperature values ​​refers to the sum of the frequency converter frequencies corresponding to the recording of different target temperature values.

[0065] The phrase "obtaining the corresponding target frequency based on the target temperature value set by the user" refers to calculating the total frequency of the inverter required to reach that temperature based on the target temperature value.

[0066] After receiving the target frequency, the cloud server will compare it with historical data and return inverter frequency combination data that matches the target frequency.

[0067] It is understood that the technical solution provided in this embodiment establishes a mapping relationship between target temperature value and target frequency by recording the target frequency corresponding to different target temperature values ​​when the frequency converter meets the target frequency in the normal mode. In the silent mode, the target frequency is sent to the cloud server to obtain the frequency combination under the target frequency. According to the frequency combination, the number of frequency converters turned on and the operating frequency of each frequency converter are controlled, which enables the frequency converter to quickly adjust to the optimal silent frequency, improves the noise reduction efficiency, and has universality, reducing the dependence on sound-absorbing materials and structures.

[0068] In practice, the control method may further include:

[0069] If the cloud server does not provide feedback, record the minimum noise value corresponding to the minimum operating frequency of a single inverter, and then control the single inverter to gradually increase the frequency according to the preset amplitude.

[0070] During the frequency increase process, the current noise level of the frequency converter is monitored in real time.

[0071] When the current noise value reaches an integer multiple N of the minimum noise value, calculate the growth factor M of the current frequency compared to the minimum operating frequency. If M≥N, control the frequency of a single frequency converter to increase; otherwise, start the next frequency converter. N is a positive integer and M≥1.

[0072] Repeat the judgment until the sum of the current frequencies is within a preset range around the target frequency, and then upload the frequency combination and corresponding noise value at the current target frequency to the cloud server.

[0073] It should be noted that if the cloud server does not provide feedback, the target frequency will be the sum of the frequencies corresponding to the closest temperature values ​​stored locally. If there is no local data, the target frequency will be the frequency calculated according to the temperature set by the user.

[0074] It should be noted that when the frequency of the inverter is high, high-frequency noise will be generated, causing the noise value to surge. If the growth factor M of the current frequency compared to the minimum operating frequency is less than the growth factor N of the current noise value compared to the minimum noise value, it indicates that the noise increment generated by the frequency increase of the inverter has exceeded the frequency increment of the inverter. Therefore, the frequency of the already activated inverter will no longer be increased. Instead, the next inverter will be activated, starting from a low frequency to avoid a surge in noise value.

[0075] Understandably, adjusting the frequency of a single inverter can avoid the noise surge caused by adjusting all inverters together, thus improving the accuracy and efficiency of noise reduction. By comparing the increase factor of the current frequency compared to the minimum operating frequency with the increase factor of the current noise value compared to the minimum noise value, it is determined whether to control the frequency increase of a single inverter or start the next inverter, thus avoiding the generation of high-frequency noise, ensuring the stability of the noise reduction effect, and ultimately achieving optimal quiet noise. By uploading the frequency combination and corresponding noise value at the current target frequency to the cloud server, empirical data can be stored in the cloud server, which can be easily called when the inverter equipment enters silent mode, thereby achieving a rapid noise reduction effect.

[0076] In practice, the control method further includes:

[0077] If the next inverter is turned on, the operating frequency of the previously running inverter will be reduced by half to the minimum operating frequency, and the newly turned-on inverter will be controlled to gradually increase the frequency by a preset amount.

[0078] During the frequency increase process, the current noise level of the frequency converter is monitored in real time.

[0079] When the current noise value reaches an integer multiple N of the minimum noise value, calculate the growth factor M of the current frequency compared to the minimum operating frequency. If M≥N, control the newly activated frequency converter to increase its frequency; otherwise, activate the next frequency converter. N is a positive integer and M≥1.

[0080] Repeat the judgment until the sum of the current frequencies is within a preset range around the target frequency, and then upload the frequency combination and corresponding noise value at the current target frequency to the cloud server.

[0081] It should be noted that reducing the operating frequency of the previously running single frequency converter to half of the minimum operating frequency and starting the next frequency converter (starting at the minimum operating frequency) is to ensure that the entire system can meet the condition M≥N. Controlling the newly started frequency converter to gradually increase the frequency according to the preset amplitude can avoid generating high-frequency noise, ensure the stability of noise reduction, and thus achieve the best quiet frequency.

[0082] In practice, the control method further includes:

[0083] If all frequency converters are turned on, but the sum of the current frequencies is still less than the target frequency, the frequency converters other than the one with the highest frequency will be boosted one by one in order of frequency from low to high until the sum of the current frequencies is within the preset range around the target frequency.

[0084] It should be noted that the frequency ramping operation, performed sequentially from low to high frequency for all frequency converters except the highest frequency converter, is to avoid the frequency converters operating at high frequencies and generating high-frequency noise.

[0085] It is understandable that by sequentially performing a frequency ramping operation on all frequency converters except the one with the highest frequency, starting from low to high, the generation of high-frequency noise can be avoided, and the target frequency can be reached, thereby achieving the desired noise reduction effect.

[0086] In practice, the control method further includes:

[0087] If the current total frequency is within a preset range around the target frequency, the current target frequency, the corresponding frequency combination and noise value are sent to the cloud server. The cloud server then compares the noise value at the currently uploaded target frequency with the noise value at the same target frequency stored in its own database. If the noise value is lower, the cloud server updates the frequency combination and noise value at the target frequency stored in its own database with the currently uploaded frequency combination and noise value.

[0088] It is understandable that by sending the local target frequency, the corresponding frequency combination, and the noise value to the cloud server, the cloud server can update and record the optimal solution data, thereby improving the practicality of the cloud server's feedback data, enhancing the noise reduction effect of the frequency converter, and achieving rapid noise reduction.

[0089] In practice, the control method further includes:

[0090] Store the current target frequency, the frequency combination and noise value corresponding to the target frequency, when the sum of the current frequencies is within a preset range around the target frequency;

[0091] When entering silent mode again, the frequency combination under the target frequency is obtained from the cloud server. If there is no feedback from the cloud server, the frequency combination that is the same as or close to the target frequency is searched in the local database, and the number of inverters turned on and the operating frequency are controlled according to the corresponding frequency combination.

[0092] Understandably, in silent mode, by obtaining empirical data from cloud servers or local databases, it is possible to achieve rapid noise reduction and reach the optimal silent frequency, thus achieving a balance and optimization between frequency conversion and noise reduction.

[0093] Example 2

[0094] Figure 2 This is a schematic block diagram of a frequency converter noise reduction control device 100 according to an exemplary embodiment of the present invention. See also: Figure 2 The device 100 includes:

[0095] Module 101 is used to determine the number of frequency converters in the frequency conversion equipment;

[0096] The detection module 102 is used to detect the current noise value of the frequency converter and read the target temperature value set by the user.

[0097] The control module 103 is used to control the number of frequency converters turned on and the operating frequency based on the noise value and the target temperature value.

[0098] It should be noted that the technical solution provided in this embodiment, in practice, is implemented in the controller of the variable frequency device, or in an electronic device connected to the controller. The variable frequency device includes, but is not limited to: variable frequency air conditioners, variable frequency refrigerators, variable frequency washing machines, and variable frequency fresh air systems.

[0099] The implementation methods and beneficial effects of the above modules can be found in the description of the above embodiments, and will not be repeated in this embodiment.

[0100] It is understood that the technical solution provided in this embodiment detects the current noise value of the frequency converter and reads the target temperature value set by the user. Based on the noise value and the target temperature value, it controls the number of frequency converters turned on and the operating frequency. By controlling the number of frequency converters turned on and the operating frequency, the noise level is controlled. This eliminates the dependence on sound-absorbing materials and structures, and minimizes the noise generated by the frequency converter during operation without changing the existing structure and materials of the frequency converter.

[0101] Example 3

[0102] According to another embodiment of the present invention, a frequency converter is provided, comprising:

[0103] The processor, communication interface, memory, and communication bus are connected, with the processor, communication interface, and memory communicating with each other via the communication bus.

[0104] Memory, used to store computer programs;

[0105] The processor implements the above method when executing programs stored in memory.

[0106] In practice, the frequency converter is one of the following:

[0107] Inverter air conditioners, inverter refrigerators, inverter washing machines, and inverter fresh air systems.

[0108] It is understood that the technical solution provided in this embodiment detects the current noise value of the frequency converter and reads the target temperature value set by the user. Based on the noise value and the target temperature value, it controls the number of frequency converters turned on and the operating frequency. By controlling the number of frequency converters turned on and the operating frequency, the noise level is controlled. This eliminates the dependence on sound-absorbing materials and structures, and minimizes the noise generated by the frequency converter during operation without changing the existing structure and materials of the frequency converter.

[0109] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0110] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0111] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0112] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0113] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A noise reduction control method for frequency converter equipment, characterized in that, include: Determine the number of frequency converters in the frequency conversion equipment; Detect the current noise level of the frequency converter and read the target temperature value set by the user; The number of frequency converters turned on and the operating frequency are controlled based on the noise level and the target temperature. Based on the noise level and target temperature, control the number of frequency converters activated and their operating frequency, including: In normal mode, the target frequency corresponding to the variable frequency device meeting different target temperature values ​​is recorded; In silent mode, the target frequency is obtained based on the user-defined target temperature value; Send the target frequency to the cloud server so that the cloud server can return the frequency combination under the target frequency; Based on the frequency combination, control the number of frequency converters to be turned on and the operating frequency of each frequency converter; The method further includes: If the cloud server does not provide feedback, record the minimum noise value corresponding to the minimum operating frequency of a single inverter, and then control the single inverter to gradually increase the frequency according to the preset amplitude. During the frequency increase process, the current noise level of the frequency converter is monitored in real time. When the current noise value reaches an integer multiple N of the minimum noise value, calculate the growth factor M of the current frequency compared to the minimum operating frequency. If M≥N, control the frequency of a single frequency converter to increase; otherwise, start the next frequency converter. N is a positive integer and M≥1. Repeat the judgment until the sum of the current frequencies is within a preset range around the target frequency, and then upload the frequency combination and corresponding noise value at the current target frequency to the cloud server.

2. The method according to claim 1, characterized in that, Also includes: If the next inverter is turned on, the operating frequency of the previously running inverter will be reduced by half to the minimum operating frequency, and the newly turned-on inverter will be controlled to gradually increase the frequency by a preset amount. During the frequency increase process, the current noise level of the frequency converter is monitored in real time. When the current noise value reaches an integer multiple N of the minimum noise value, calculate the growth factor M of the current frequency compared to the minimum operating frequency. If M≥N, control the newly activated frequency converter to increase its frequency; otherwise, activate the next frequency converter. N is a positive integer and M≥1. Repeat the judgment until the sum of the current frequencies is within a preset range around the target frequency, and then upload the frequency combination and corresponding noise value at the current target frequency to the cloud server.

3. The method according to claim 2, characterized in that, Also includes: If all frequency converters are turned on, but the sum of the current frequencies is still less than the target frequency, the frequency converters other than the one with the highest frequency will be boosted one by one in order of frequency from low to high until the sum of the current frequencies is within the preset range around the target frequency.

4. The method according to any one of claims 1 to 3, characterized in that, include: If the current total frequency is within a preset range around the target frequency, the current target frequency, along with the corresponding frequency combination and noise value, is sent to the cloud server. This allows the cloud server to compare the noise value at the currently uploaded target frequency with the noise value stored at the same target frequency. If the latter is lower, the cloud server updates the frequency combination and noise value stored at the target frequency to the currently uploaded frequency combination and noise value.

5. The method according to claim 4, characterized in that, Also includes: Store the current target frequency, the frequency combination and noise value corresponding to the target frequency, when the sum of the current frequencies is within a preset range around the target frequency; When entering silent mode again, the frequency combination under the target frequency is obtained from the cloud server. If there is no feedback from the cloud server, the frequency combination that is the same as or close to the target frequency is searched in the local database, and the number of inverters turned on and the operating frequency are controlled according to the corresponding frequency combination.

6. A noise reduction control device for frequency converters, used to implement the method as described in claim 5, characterized in that, include: The determination module is used to determine the number of frequency converters in the frequency conversion equipment; The detection module is used to detect the current noise level of the frequency converter and read the target temperature value set by the user. The control module is used to control the number of inverters turned on and the operating frequency based on the noise level and target temperature.

7. A frequency converter, characterized in that, include: The processor, communication interface, memory, and communication bus are connected, with the processor, communication interface, and memory communicating with each other via the communication bus. Memory, used to store computer programs; A processor, when executing a program stored in memory, implements the method of claim 5.

8. The frequency converter according to claim 7, characterized in that, The variable frequency device is one of the following: Inverter air conditioners, inverter refrigerators, inverter washing machines, and inverter fresh air systems.

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