CN113932408A - Anti-resonance control method for variable frequency air conditioner - Google Patents
Anti-resonance control method for variable frequency air conditioner Download PDFInfo
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- 239000003507 refrigerant Substances 0.000 abstract description 3
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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
- F24F11/30—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
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
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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
- 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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
Abstract
The invention relates to a frequency conversion air conditioner anti-resonance control method, which is characterized in that a processing device is adopted for adjustment, the processing device comprises a vibration acquisition module, a storage module, a vibration analysis module and a control module, the vibration acquisition module acquires the current pipeline vibration condition, the vibration analysis device analyzes data, the data stored in the storage module is compared, if the current operation frequency data is abnormal, the frequency is stored in the storage module, the control module performs frequency adjustment control, the data acquired after adjustment is analyzed and compared, if no problem exists, the frequency is operated according to the frequency, and if the data is abnormal, the adjustment is performed again. According to the invention, the vibration condition of the pipeline of the external machine is analyzed and judged after being collected, and the storage module is used for comprehensively comparing and judging the vibration condition, so that the problem of refrigerant leakage caused by pipe breakage, pipe breakage and the like of the machine due to resonance of the frequency converter is intelligently solved.
Description
Technical Field
The invention belongs to the technical field of variable frequency air conditioners, and particularly relates to an anti-resonance control method of a variable frequency air conditioner.
Background
When the inverter air conditioner in the prior art is developed, a stress-strain test is carried out on a pipeline, a frequency sweep test is carried out on each frequency point of a compressor, a machine resonance point is found, and then resonance is avoided by shielding the resonance point through software. However, due to the manufacturing consistency of the compressor, the manufacturing consistency of the pipeline of the whole machine system, the consistency of the refrigerant filling amount, the installation difference and the like, the resonance frequency shifts when the compressor is used by an actual user, the situations of noise generation, pipeline breakage and the like are caused, the situations of poor user experience or machine damage and the like occur, and the loss generated by a large machine set is particularly large.
Chinese patent CN103912956B discloses a variable frequency air conditioner and a resonance point jump adaptive method thereof, but this method needs to add more types of sensors, and the method is overall more complex, and chinese patent CN111550899A discloses a control method for eliminating resonance of an air conditioner by adaptive speed regulation, in this method, a noise monitoring mode is mainly adopted to determine whether resonance exists in the air conditioner, and resonance is eliminated by controlling the speed of a motor, the detection precision of the above mode is not high, and the overall mechanism is more complex.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an anti-resonance control method of a variable frequency air conditioner, which has the advantages of simple structure, convenient operation and good regulation and control effect
In order to achieve the purpose, the invention adopts the following technical scheme:
a frequency conversion air conditioner anti-resonance control method is characterized in that a processing device is adopted for adjustment, the processing device comprises a vibration acquisition module, a storage module, a vibration analysis module and a control module, and the four modules perform data interaction in a data bus; the method comprises the following steps:
step 1), respectively obtaining a group of reference data for stress-strain tests of pipelines at different positions in the development process of the variable frequency air conditioner, and storing the reference data into a storage module;
step 2), the vibration acquisition module comprises a vibration sensor, pipeline vibration detection points are added in the design of the whole variable frequency air conditioner, the most direct points in relation with the frequency of the compressor are judged through an amplitude stress test, the vibration sensor is installed at the points, and the vibration sensor detects data and then transmits the data to the vibration analysis module in the power-on operation process of the whole variable frequency air conditioner;
step 3), the vibration analysis module preprocesses the data acquired by the vibration acquisition module, compares the data with reference data stored in the storage module in advance, makes limit values of amplitude and frequency at different resonance points in advance, outputs a comparison result to the control module after comparing the limit values with the limit values, and memorizes a bad result to the storage module;
step 4), the control module adjusts the output frequency of the compressor after receiving the poor comparison data result, if the control target temperature does not meet the temperature difference requirement and the system protection and the electric control protection do not exist, the control module has the frequency increasing requirement at this time, and the frequency is adjusted upwards; if the control target temperature exceeds the control temperature difference or system or electric control protection exists, the control module has a frequency reduction requirement at this time, and the frequency is adjusted downwards;
step 5), the vibration sensor detects data again, and judges whether the current frequency meets the operation condition again after analysis and comparison through the vibration analysis module, if the data is detected to be still overproof, the adjustment is continued; if not, maintaining the current frequency.
As a preferable scheme: the vibration sensors are one or more and distributed at one or more positions of the exhaust pipe, the air return pipe, the air supply enthalpy increasing pipe and the four-way valve, the vibration sensors at different positions are provided with different port definitions, and the corresponding storage datum data of the vibration sensors at different positions in the storage module are different.
As a preferable scheme: the vibration acquisition module further comprises an information transmission line, the vibration sensor acquires the pipeline vibration condition by receiving a command of the control module through the information transmission line, and the data is transmitted to the vibration analysis module through the information transmission line after the vibration sensor acquires the pipeline vibration condition.
As a preferable scheme: in the step 5), if the data result transmitted by the vibration analysis module is received by the control module and is a bad comparison data result, sending the frequency information of the data to the storage module for recording, and shielding the frequency after the recording times reach a times to form shielded point data.
As a preferable scheme: and if the shielding point data of the storage module is increased to b, reporting a vibration standard exceeding fault, and reminding unit maintenance.
As a preferable scheme: the control module is an air conditioner controller and comprises a controller MCU, a communication port and a variable frequency compressor control port, the controller MCU receives a data result transmitted by the vibration analysis module, judges whether the running process of the compressor is in an up-frequency interval or down-frequency interval, if the compressor is in a down-frequency interval, the frequency skips a point with poor vibration data, continues down-frequency reduction, and if the compressor is in the up-frequency interval, the frequency skips a point with poor vibration data, and continues up-frequency increase.
As a preferable scheme: the storage module is an EE chip or a Flash memory in the singlechip.
As a preferable scheme: the vibration analysis module comprises a vibration data processing unit and a vibration data comparison unit; the vibration data processing unit converts the mechanical vibration quantity into electric quantity, and then measures the electric quantity to obtain the mechanical quantity to be measured; the vibration data comparison unit converts the vibration parameters into electric signals, amplifies the electric signals by an electronic circuit, compares the electric signals with reference data stored in the storage module in advance, and outputs comparison results to the control module.
Compared with the prior art, the invention has the beneficial effects that:
the vibration analysis device acquires the current pipeline vibration condition through the vibration acquisition module, performs data analysis through the vibration analysis device, compares data stored in the storage module, stores the frequency into the storage module if the current operation frequency data is abnormal, performs frequency adjustment control through the control module, analyzes and compares the acquired data after adjustment, operates according to the frequency if no problem exists, and performs adjustment again if the data is abnormal.
According to the invention, the vibration condition of the pipeline of the external machine is analyzed and judged after being collected, and the storage module is used for comprehensively comparing and judging the vibration condition, so that the problem of refrigerant leakage caused by pipe breakage, pipe breakage and the like of the machine due to resonance of the frequency converter is intelligently solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic diagram of the control method of the present invention.
The labels in the figures are: 1. a vibration acquisition module; 2. a vibration analysis module; 3. a storage module; 4. and a control module.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, elements, and/or combinations thereof, unless the context clearly indicates otherwise.
Further, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The invention will be further illustrated with reference to the following examples and drawings:
as shown in fig. 1, the method for controlling anti-resonance of a variable frequency air conditioner adjusts by using a processing device, wherein the processing device comprises a vibration acquisition module 1, a storage module 2, a vibration analysis module 3 and a control module 4, and the four modules perform data interaction on one data bus; the method comprises the following steps:
step 1, respectively obtaining a group of reference data for stress-strain tests of pipelines at different positions in the development process of the variable frequency air conditioner, and storing the reference data into a storage module 2; under the condition that the reference data is not exceeded, the reliability of the pipeline can be effectively guaranteed, and the pipe can be prevented from being broken;
step 2, the vibration acquisition module 1 comprises a vibration sensor, pipeline vibration detection points are added in the design of the whole variable frequency air conditioner, the most direct points in relation with the frequency of the compressor are judged through an amplitude stress test, the vibration sensor is installed at the points, and the vibration sensor detects data and then transmits the data to the vibration analysis module 3 in the power-on operation process of the whole variable frequency air conditioner;
the vibration sensors are one or more and distributed at one or more positions of the exhaust pipe, the air return pipe, the air supply enthalpy increasing pipe and the four-way valve, the vibration sensors at different positions are provided with different port definitions, and the corresponding storage datum data of the vibration sensors at different positions in the storage module 2 are different;
step 3, the vibration analysis module 3 preprocesses the data acquired by the vibration acquisition module 1, compares the preprocessed data with reference data stored in the storage module 2 in advance, makes limit values of amplitude and frequency at different resonance points in advance, outputs a comparison result to the control module 4 after comparing the limit values with the limit values, and memorizes a bad result in the storage module 2;
step 4, the control module 4 adjusts the output frequency of the compressor after receiving the result of the bad comparison data, if the control target temperature does not meet the temperature difference requirement and the system protection and the electric control protection do not exist, the control module 4 has the frequency increasing requirement at the moment, and the frequency is adjusted upwards; if the control target temperature exceeds the control temperature difference or system or electric control protection exists, the control module 4 needs to reduce the frequency at the moment, and the frequency is adjusted downwards;
step 5, the vibration sensor detects data again, and judges whether the current frequency meets the operation condition again after analysis and comparison through the vibration analysis module 3, if the data is checked to be still overproof, adjustment is continued; if not, maintaining the current frequency.
In the step 5, if the data result transmitted by the vibration analysis module 3 is received by the control module 4 and is a bad comparison data result, the frequency information of the data is transmitted to the storage module 2 for recording, and the frequency is shielded after the recording times reach a times, so as to form shielded point data. And if the shielding point data of the storage module 2 is increased to b, reporting a vibration standard exceeding fault, and reminding unit maintenance.
The vibration acquisition module 1 further comprises an information transmission line, the vibration sensor receives a command of the control module 4 through the information transmission line to acquire the vibration condition of the pipeline, and the acquired data are transmitted to the vibration analysis module 3 through the information transmission line.
The storage module is an EE chip in the controller or a Flash memory in the singlechip, data which may damage pipelines due to vibration at different positions are obtained through tests in the development process, the data are stored in the storage module, a large amount of vibration data are stored in advance, the vibration data are preprocessed, and then the vibration data which are well identified based on a source domain are used as initial data parameters of detection data of vibration conditions and stored in the storage module.
The control module 4 is an air conditioner controller and comprises a controller MCU, a communication port and a control port of the variable frequency compressor, the controller MCU receives a data result transmitted by the vibration analysis module 3, judges whether the running process of the compressor is in an up-frequency interval or down-frequency interval, if the compressor is in a down-frequency interval, the frequency skips over a point with poor vibration data, the down-frequency is continued, and if the compressor is in the up-frequency interval, the point with poor vibration data is skipped over, and the up-frequency is continued; and sending the frequency generated by the bad result to a storage module for storage and recording, and shielding the frequency after the recording times reach a certain number. The compressor is directly skipped when running to the frequency next time, resonance is avoided, and faults are reported after the number of the local shielding points is increased to a certain number, so that a user is reminded to maintain the compressor.
The vibration analysis module 3 comprises a vibration data processing unit and a vibration data comparison unit; the vibration data processing unit converts the mechanical vibration quantity into electric quantity, and then measures the electric quantity to obtain the mechanical quantity to be measured; the vibration data comparison unit converts the vibration parameters into electric signals, amplifies the electric signals by an electronic circuit, compares the electric signals with reference data stored in the storage module 2 in advance, and outputs comparison results to the control module 4.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principle and spirit of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.
Claims (8)
1. A frequency conversion air conditioner anti-resonance control method is characterized in that: the method comprises the steps that adjustment is carried out through a processing device, the processing device comprises a vibration acquisition module (1), a storage module (2), a vibration analysis module (3) and a control module (4), and data interaction is carried out on the four modules through a data bus; the method comprises the following steps:
step 1), respectively obtaining a group of reference data for stress-strain tests of pipelines at different positions in the development process of the variable frequency air conditioner, and storing the reference data into a storage module (2);
step 2), the vibration acquisition module (1) comprises a vibration sensor, pipeline vibration detection points are added in the design of the whole variable frequency air conditioner, the most direct points in relation with the frequency of the compressor are judged through an amplitude stress test, the vibration sensor is installed at the points, and the vibration sensor detects data in the power-on operation process of the whole variable frequency air conditioner and then transmits the data to the vibration analysis module (3);
step 3), the vibration analysis module (3) preprocesses the data acquired by the vibration acquisition module (1), compares the data with reference data stored in the storage module (2) in advance, makes limit values of amplitude and frequency at different resonance points in advance, outputs a comparison result to the control module (4) after comparing the limit values, and memorizes a bad result in the storage module (2);
step 4), the control module (4) adjusts the output frequency of the compressor after receiving the result of the bad comparison data, if the control target temperature does not meet the temperature difference requirement and the system protection and the electric control protection do not exist, the control module (4) has the frequency increasing requirement at the moment, and the frequency is adjusted upwards; if the control target temperature exceeds the control temperature difference or system or electric control protection exists, the control module (4) has a frequency reduction requirement at the moment, and the frequency is adjusted downwards;
step 5), the vibration sensor detects data again, and whether the current frequency meets the operation condition is judged again after analysis and comparison are carried out through the vibration analysis module (3), if the data are checked to be still overproof, adjustment is continued; if not, maintaining the current frequency.
2. The anti-resonance control method of the variable frequency air conditioner according to claim 1, characterized in that: the vibration sensors are one or more and distributed at one or more positions of the exhaust pipe, the air return pipe, the air supply enthalpy increasing pipe and the four-way valve, the vibration sensors at different positions are provided with different port definitions, and the corresponding storage datum data of the vibration sensors at different positions in the storage module (2) are different.
3. The anti-resonance control method of the variable frequency air conditioner according to claim 1, characterized in that: the vibration acquisition module (1) further comprises an information transmission line, the vibration sensor receives a command of the control module (4) through the information transmission line to acquire the vibration condition of the pipeline, and data are transmitted to the vibration analysis module (3) through the information transmission line after the vibration sensor acquires the vibration condition.
4. The anti-resonance control method of the variable frequency air conditioner according to claim 1, characterized in that: in the step 5), if the data result transmitted by the vibration analysis module (3) is received by the control module (4) and is a bad comparison data result, sending the frequency information of the data to the storage module (2) for recording, and shielding the frequency after the recording times reach a times to form shielding point data.
5. The anti-resonance control method of the variable frequency air conditioner according to claim 5, characterized in that: and if the shielding point data of the storage module (2) is increased to b, reporting a vibration standard exceeding fault, and reminding unit maintenance.
6. The anti-resonance control method of the variable frequency air conditioner according to claim 1, characterized in that: the control module (4) is an air conditioner controller and comprises a controller MCU, a communication port and a control port of the variable frequency compressor, the controller MCU receives a data result transmitted by the vibration analysis module (3), judges whether the running process of the compressor is in an up-frequency interval or down-frequency interval, if the compressor is in a down-frequency interval, the frequency skips a point with poor vibration data, continues down-frequency reduction, and if the compressor is in the up-frequency interval, the frequency skips a point with poor vibration data, and continues up-frequency increase.
7. The anti-resonance control method of the variable frequency air conditioner according to claim 1, characterized in that: the storage module (2) is an EE chip or a Flash memory in the singlechip.
8. The anti-resonance control method of the variable frequency air conditioner according to claim 1, characterized in that: the vibration analysis module (3) comprises a vibration data processing unit and a vibration data comparison unit; the vibration data processing unit converts the mechanical vibration quantity into electric quantity, and then measures the electric quantity to obtain the mechanical quantity to be measured; the vibration data comparison unit converts the vibration parameters into electric signals, amplifies the electric signals through an electronic circuit, compares the electric signals with reference data stored in the storage module (2) in advance, and outputs comparison results to the control module (4).
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| CN202111112373.4A CN113932408A (en) | 2021-09-18 | 2021-09-18 | Anti-resonance control method for variable frequency air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023246143A1 (en) * | 2022-06-24 | 2023-12-28 | 青岛海尔空调器有限总公司 | Pipeline stress testing method applied to saddle type window air conditioner, and saddle type window air conditioner |
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| JPH11287497A (en) * | 1998-03-31 | 1999-10-19 | Toyotomi Co Ltd | Controller of air conditioner |
| CN110836516A (en) * | 2019-10-18 | 2020-02-25 | 珠海格力电器股份有限公司 | Heating and ventilation equipment control method and device and heating and ventilation system |
| CN110986264A (en) * | 2019-11-21 | 2020-04-10 | 珠海格力电器股份有限公司 | Air conditioner low-frequency resonance noise identification control method and air conditioner |
| CN111397171A (en) * | 2020-04-14 | 2020-07-10 | 宁波奥克斯电气股份有限公司 | Compressor frequency control method and device and air conditioner |
| CN113324328A (en) * | 2021-05-11 | 2021-08-31 | Tcl空调器(中山)有限公司 | Method and device for determining shielding frequency of refrigeration equipment and storage medium |
-
2021
- 2021-09-18 CN CN202111112373.4A patent/CN113932408A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11287497A (en) * | 1998-03-31 | 1999-10-19 | Toyotomi Co Ltd | Controller of air conditioner |
| CN110836516A (en) * | 2019-10-18 | 2020-02-25 | 珠海格力电器股份有限公司 | Heating and ventilation equipment control method and device and heating and ventilation system |
| CN110986264A (en) * | 2019-11-21 | 2020-04-10 | 珠海格力电器股份有限公司 | Air conditioner low-frequency resonance noise identification control method and air conditioner |
| CN111397171A (en) * | 2020-04-14 | 2020-07-10 | 宁波奥克斯电气股份有限公司 | Compressor frequency control method and device and air conditioner |
| CN113324328A (en) * | 2021-05-11 | 2021-08-31 | Tcl空调器(中山)有限公司 | Method and device for determining shielding frequency of refrigeration equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023246143A1 (en) * | 2022-06-24 | 2023-12-28 | 青岛海尔空调器有限总公司 | Pipeline stress testing method applied to saddle type window air conditioner, and saddle type window air conditioner |
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Application publication date: 20220114 |