CN113701309A - Method and device for detecting resonance frequency of air conditioner indoor unit and readable storage medium - Google Patents
Method and device for detecting resonance frequency of air conditioner indoor unit and readable storage medium Download PDFInfo
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- CN113701309A CN113701309A CN202111042216.0A CN202111042216A CN113701309A CN 113701309 A CN113701309 A CN 113701309A CN 202111042216 A CN202111042216 A CN 202111042216A CN 113701309 A CN113701309 A CN 113701309A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a method, a device and a readable storage medium for detecting the resonance frequency of an air conditioner indoor unit, comprising S1, starting the air conditioner, setting the compressor frequency and the indoor unit wind speed as the minimum values, and leading the state to be operated to tend to be stable; s2, detecting the condensation temperature, judging whether the condensation temperature exceeds the condensation temperature limit value, if so, executing S3, otherwise, executing S4; s3, increasing the wind speed of the indoor unit, and executing the step S2 after the indoor unit is operated for a period of time: and S4, detecting the noise of the internal machine after the noise of the internal machine is stable, judging whether the internal machine resonates according to whether the noise exceeds a limit value, recording the frequency of the compressor if the noise exceeds the limit value, and otherwise, judging that the internal machine does not resonate. The invention strengthens the noise, the amplitude and the like when the inner machine resonates, so that whether the inner machine resonates or not is easily judged, all the inner machine resonant frequencies of the compressor excitation frequency band are easily detected, and the omission detection is not easy to occur.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for detecting the resonance frequency of an air conditioner indoor unit and a readable storage medium.
Background
The resonance of the air conditioner internal unit can cause noise to increase and even make a sound, and the main factors are that the vibration frequency of the compressor is identical with the natural frequency of the box body and the pipeline, so that the resonance is generated, the noise is amplified, and the user experience is seriously influenced. Therefore, how to quickly and accurately confirm the frequency of the compressor exciting the resonance of the internal machine is important for the vibration reduction design of the internal machine of the air conditioner. In the early development stage of a general air conditioner, the resonance of an internal machine is analyzed and optimized through a simulation technology. However, the simulation calculation result is influenced by the accuracy of boundary conditions such as a structural model and an excitation source, and large deviation is likely to occur.
At present, most of detection schemes are used for confirming the occurrence of a resonance phenomenon by detecting noise, amplitude and the like after the resonance occurs in an air conditioner indoor unit. These solutions focus on specific methods for detecting noise and amplitude after resonance, but basically do not relate to how to enhance the resonance effect, so that it is easier to distinguish whether resonance occurs. Due to the reasons, although the inner machine is likely to resonate, the excitation strength is low, the resonance amplitude and noise are not obvious, and finally the resonance frequency band is missed to be detected. Under some extreme working conditions, the air conditioner can generate obvious resonance in the frequency bands which are not detected, and the user experience is seriously influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method and a device for detecting the resonance frequency of an air conditioner indoor unit and a readable storage medium, so as to solve the technical problem that resonance is easy to miss detection in the related technology.
The invention provides a method for detecting the resonance frequency of an air conditioner indoor unit, which comprises the following steps:
s1, starting the air conditioner, setting the compressor frequency and the indoor unit wind speed as minimum values, and enabling the state to be operated to tend to be stable;
s2, detecting the condensation temperature, judging whether the condensation temperature exceeds the condensation temperature limit value, if so, executing S3, otherwise, executing S4;
s3, increasing the wind speed of the indoor unit, and executing the step S2 after the indoor unit is operated for a period of time;
and S4, detecting the noise of the internal machine after the noise of the internal machine is stable, judging whether the internal machine resonates according to whether the noise exceeds a limit value, recording the frequency of the compressor if the noise exceeds the limit value, and otherwise, judging that the internal machine does not resonate.
Optionally, the operation-waiting state tends to be stable, and the operation-waiting state includes:
and entering a heating mode, and after the air conditioner is operated for a period of time, enabling the operation state of the air conditioner to tend to be stable.
Optionally, the determining whether to resonate according to whether the noise exceeds a limit value includes:
detecting noise in the frequency range of 0-200HZ, and judging as resonance when the noise exceeds 48 HZ.
On the other hand, the invention also provides a method for detecting the resonance frequency of the air conditioner indoor unit, which comprises the following steps:
a1, starting the air conditioner, setting the compressor frequency and the indoor unit wind speed as minimum values, and enabling the state to be operated to tend to be stable;
a2, detecting the condensation temperature, judging whether the condensation temperature exceeds the condensation temperature limit value, if so, executing S3, otherwise, executing S4;
a3, increasing the wind speed of the indoor unit, and executing the step S2 after the indoor unit is operated for a period of time:
a4, detecting the vibration amplitude of the internal machine, judging whether the internal machine resonates according to whether the vibration amplitude exceeds a limit value, if so, judging the internal machine resonates, recording the frequency of the compressor, otherwise, judging that the internal machine does not resonate.
Optionally, the determining whether to resonate according to whether the vibration amplitude exceeds a limit value includes:
and detecting the vibration amplitude, judging the resonance of the internal machine if the vibration amplitude of the internal machine exceeds 0.5mm, and otherwise, judging that the internal machine does not have the resonance.
Optionally, the method further comprises: s5, judging whether the frequency of the compressor exceeds the limit value, if so, closing the air conditioner, otherwise, executing S6;
in another aspect, the present invention provides a device for detecting a resonant frequency of an air conditioner internal unit, including:
the operation module is used for starting the air conditioner and setting the frequency of the compressor and the wind speed of the indoor unit to be minimum values; the air conditioner is used for increasing the air speed of the indoor unit when the condensation temperature exceeds a limit value;
the detection module is used for detecting the numerical value of the condensation temperature; the numerical value is used for detecting the noise or vibration amplitude of the air conditioner indoor unit;
the judgment module is used for judging whether the condensation temperature exceeds the condensation temperature limit value or not according to the numerical value of the condensation temperature; and when the condensation temperature exceeds the condensation temperature limit value, judging whether resonance is generated according to the numerical value of the noise or vibration amplitude of the air conditioner indoor unit.
Optionally, comprising:
the judging module is used for judging whether the frequency of the compressor exceeds the limit or not if the internal machine does not generate resonance;
and the circulation module is used for increasing the frequency of the compressor by 1-2HZ when the frequency of the compressor does not exceed the limit after judging that the internal machine does not resonate.
In another aspect, the present invention provides a readable storage medium storing a computer program, which when read and executed by a processor implements the method described above.
Compared with the prior art, the invention has the following beneficial effects:
in the technology of the invention, the noise, the amplitude and the like of the internal machine during resonance are strengthened, so that whether the internal machine resonates or not is easily judged, the resonance frequency of all the internal machines in the excitation frequency band of the compressor is more easily detected, and the omission detection is not easy to occur.
Drawings
Fig. 1 is a schematic flow chart illustrating an embodiment of a method for detecting a resonant frequency of an air conditioner internal unit according to the present invention;
FIG. 2 is a schematic flow chart illustrating a method for detecting a resonant frequency of an air conditioner indoor unit according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a device for detecting the resonant frequency of an air conditioner indoor unit according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and beneficial effects of the present invention more clearly apparent, the technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention provides a method for detecting a resonant frequency of an air conditioner indoor unit, including:
s1, starting the air conditioner, setting the compressor frequency and the indoor unit wind speed as minimum values, and enabling the state to be operated to tend to be stable;
s2, detecting the condensation temperature, judging whether the condensation temperature exceeds the condensation temperature limit value, if so, executing S3, otherwise, executing S4;
s3, increasing the wind speed of the indoor unit, and executing the step S2 after the indoor unit is operated for a period of time;
and S4, detecting the noise of the internal machine after the noise of the internal machine is stable, judging whether the internal machine resonates according to whether the noise exceeds a limit value, recording the frequency of the compressor if the noise exceeds the limit value, and otherwise, judging that the internal machine does not resonate.
In this embodiment, the air conditioner is started first, the frequency of the compressor is set to a minimum value, the air speed of the indoor unit is set to a minimum air, after the air conditioner is operated for a short period of time (usually about one minute), the operating state of the air conditioner tends to be stable, then the condensation temperature is detected, the compressor is shut down due to overhigh load caused by overhigh condensation temperature, the purpose of detecting the condensation temperature is to ensure that the compressor does not shut down, the load of the compressor is improved as much as possible, if the condensation temperature exceeds a limit value, the air speed of the fan is increased to cool, the condensation temperature is detected again after the air conditioner is operated for a period of time (usually about one minute), if the condensation temperature does not exceed the limit value, after the noise of the indoor unit is stabilized, whether resonance occurs is judged by whether the numerical value of the noise exceeds the limit value, and the frequency of the current compressor is recorded. Meanwhile, the tested indoor temperature and outdoor temperature are ensured to be 25 ℃, preferably 30 ℃ during testing, so that the load of the compressor is increased, the excitation strength of the compressor is improved, and the maximum bearing load of the compressor cannot be exceeded; the condensation temperature limit was 60 ℃. The invention can realize the quick check of whether resonance occurs by increasing the load of the compressor as much as possible, increasing the excitation strength and judging whether resonance occurs or not through the numerical value of the noise.
Optionally, the operation-waiting state tends to be stable, and the operation-waiting state includes:
and entering a heating mode, and after the air conditioner is operated for a period of time, enabling the operation state of the air conditioner to tend to be stable.
In this embodiment, since the heating load is higher than the cooling load, the detection is more facilitated.
Optionally, the determining whether to resonate according to whether the noise exceeds a limit value, and determining that the internal machine resonates if the noise exceeds the limit value includes:
detecting noise in the frequency range of 0-200HZ, and judging as resonance if the noise exceeds 48 HZ.
In this embodiment, the detection noise adopts to seal the detection usually in the noise laboratory, detection noise numerical value that can be better, the frequency channel rate of detectable noise 0 to 90HZ in the testing process.
On the other hand, the invention also provides a method for detecting the resonance frequency of the air conditioner indoor unit, which comprises the following steps:
a1, starting the air conditioner, setting the compressor frequency and the indoor unit wind speed as minimum values, and enabling the state to be operated to tend to be stable;
a2, detecting the condensation temperature, judging whether the condensation temperature exceeds the condensation temperature limit value, if so, executing S3, otherwise, executing S4;
a3, increasing the wind speed of the indoor unit, and executing the step S2 after the indoor unit is operated for a period of time:
a4, detecting the vibration amplitude of the internal machine, judging whether the internal machine resonates according to whether the vibration amplitude exceeds a limit value, if so, judging the internal machine resonates, recording the frequency of the compressor, otherwise, judging that the internal machine does not resonate.
In this embodiment, the sensor may be further configured to detect a vibration amplitude of the internal unit, and determine whether resonance exists in the internal unit.
Optionally, the determining whether to resonate according to whether the vibration amplitude exceeds a limit value includes:
and detecting the vibration amplitude, judging the resonance of the internal machine if the vibration amplitude of the internal machine exceeds 0.5mm, and otherwise, judging that the internal machine does not have the resonance.
Referring to fig. 2, optionally, the method further includes: s5, judging whether the frequency of the compressor exceeds the limit value, if so, closing the air conditioner, otherwise, executing S6;
s6, the frequency of the compressor is increased by 1-2HZ, and step S2 is executed again.
In this embodiment, whether to increase the frequency of the compressor for continuing the test or shutting down the air conditioner is determined according to the value of the compressor, and since the embodiment is tested by setting the frequency of the compressor to the lowest value, it cannot be ensured that the air conditioner does not generate resonance, if the value of the compressor does not exceed the limit value, the frequency of the compressor is increased by 1-2HZ after the test of the embodiment is finished, and the test of the embodiment is executed again, so that different compressor frequencies of the air conditioner are tested, a comprehensive coverage test is realized, and a condition of missing test is avoided.
Referring to fig. 3, in another aspect, the present invention provides a device for detecting a resonant frequency of an air conditioner indoor unit, including:
the operation module is used for starting the air conditioner and setting the frequency of the compressor and the wind speed of the indoor unit to be minimum values; the air conditioner is used for increasing the air speed of the indoor unit when the condensation temperature exceeds a limit value;
the detection module is used for detecting the numerical value of the condensation temperature; the numerical value is used for detecting the noise or vibration amplitude of the air conditioner indoor unit;
the judgment module is used for judging whether the condensation temperature exceeds the condensation temperature limit value or not according to the numerical value of the condensation temperature; and when the condensation temperature exceeds the condensation temperature limit value, judging whether resonance is generated according to the numerical value of the noise or vibration amplitude of the air conditioner indoor unit.
Optionally, comprising:
the judging module is used for judging whether the frequency of the compressor exceeds the limit or not if the internal machine does not generate resonance;
and the circulation module is used for increasing the frequency of the compressor by 1-2HZ when the frequency of the compressor does not exceed the limit after judging that the internal machine does not resonate.
In another aspect, the present invention provides a readable storage medium, which stores a computer program, which when read and executed by a processor, implements the method described above.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (9)
1. The method for detecting the resonance frequency of the indoor unit of the air conditioner is characterized by comprising the following steps of:
s1, starting the air conditioner, setting the compressor frequency and the indoor unit wind speed as minimum values, and enabling the state to be operated to tend to be stable;
s2, detecting the condensation temperature, judging whether the condensation temperature exceeds the condensation temperature limit value, if so, executing S3, otherwise, executing S4;
s3, increasing the wind speed of the indoor unit, and executing the step S2 after the indoor unit is operated for a period of time;
and S4, detecting the noise of the internal machine after the noise of the internal machine is stable, judging whether the internal machine resonates according to whether the noise exceeds a limit value, recording the frequency of the compressor if the noise exceeds the limit value, and otherwise, judging that the internal machine does not resonate.
2. The method for detecting the resonance frequency of the indoor unit of the air conditioner as claimed in claim 1, wherein the tendency to be stable in the standby operation state comprises:
and entering a heating mode, and after the air conditioner is operated for a period of time, enabling the operation state of the air conditioner to tend to be stable.
3. The method for detecting the resonance frequency of the indoor unit of the air conditioner as claimed in claim 1, wherein the determining whether the resonance occurs according to whether the noise exceeds the limit value comprises:
detecting noise in the frequency range of 0-200HZ, and judging as resonance when the noise exceeds 48 HZ.
4. The method for detecting the resonance frequency of the indoor unit of the air conditioner is characterized by comprising the following steps of:
a1, starting the air conditioner, setting the compressor frequency and the indoor unit wind speed as minimum values, and enabling the state to be operated to tend to be stable;
a2, detecting the condensation temperature, judging whether the condensation temperature exceeds the condensation temperature limit value, if so, executing S3, otherwise, executing S4;
a3, increasing the wind speed of the indoor unit, and executing the step S2 after the indoor unit is operated for a period of time:
a4, detecting the vibration amplitude of the internal machine, judging whether the internal machine resonates according to whether the vibration amplitude exceeds a limit value, if so, judging the internal machine resonates, recording the frequency of the compressor, otherwise, judging that the internal machine does not resonate.
5. The method for detecting the resonance frequency of the indoor unit of the air conditioner as claimed in claim 4, wherein the determining whether the resonance occurs according to whether the vibration amplitude exceeds a limit value comprises:
and detecting the vibration amplitude, judging the resonance of the internal machine if the vibration amplitude of the internal machine exceeds 0.5mm, and otherwise, judging that the internal machine does not have the resonance.
6. The method for detecting the resonance frequency of an indoor unit of an air conditioner as claimed in any one of claims 1 to 5, further comprising:
s5, judging whether the frequency of the compressor exceeds the limit value, if so, closing the air conditioner, otherwise, executing S6;
s6, the frequency of the compressor is increased by 1-2HZ, and step S2 is executed again.
7. Detect air conditioner indoor unit resonant frequency device, its characterized in that includes:
the operation module is used for starting the air conditioner and setting the frequency of the compressor and the wind speed of the indoor unit to be minimum values; the air conditioner is used for increasing the air speed of the indoor unit when the condensation temperature exceeds a limit value;
the detection module is used for detecting the numerical value of the condensation temperature; the numerical value is used for detecting the noise or vibration amplitude of the air conditioner indoor unit;
the judgment module is used for judging whether the condensation temperature exceeds the condensation temperature limit value or not according to the numerical value of the condensation temperature; and the device is used for judging whether resonance occurs or not according to the numerical value of the noise or vibration amplitude of the air conditioner indoor unit when the condensation temperature exceeds the condensation temperature limit value.
8. The device for detecting the resonant frequency of the indoor unit of the air conditioner as claimed in claim 7, comprising:
the judging module is used for judging whether the frequency of the compressor exceeds the limit or not if the internal machine does not generate resonance;
and the circulation module is used for increasing the frequency of the compressor by 1-2HZ when the frequency of the compressor does not exceed the limit after judging that the internal machine does not resonate.
9. A readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the method according to any one of claims 1-5.
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| CN111550899A (en) * | 2020-05-07 | 2020-08-18 | 宋彦震 | Control method for eliminating air conditioner resonance by adaptive speed regulation |
| CN112393394A (en) * | 2019-08-15 | 2021-02-23 | 广东美的制冷设备有限公司 | Control method and device of air conditioner, air conditioner and electronic equipment |
| CN112728740A (en) * | 2020-12-07 | 2021-04-30 | 珠海格力电器股份有限公司 | Air conditioner, internal unit, high-load frequency reduction noise control method, controller and medium |
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2021
- 2021-09-07 CN CN202111042216.0A patent/CN113701309B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003262382A (en) * | 2002-03-11 | 2003-09-19 | Mitsubishi Electric Corp | Dehumidifier |
| KR20030097177A (en) * | 2002-06-19 | 2003-12-31 | 엘지전자 주식회사 | The driving control device of an air-conditioner |
| JP2012110070A (en) * | 2010-11-15 | 2012-06-07 | Panasonic Corp | Air conditioner |
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