CN113959049A - Noise improvement control method for high-load shedding and variable-frequency air conditioning system - Google Patents
Noise improvement control method for high-load shedding and variable-frequency air conditioning system Download PDFInfo
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- CN113959049A CN113959049A CN202111169809.3A CN202111169809A CN113959049A CN 113959049 A CN113959049 A CN 113959049A CN 202111169809 A CN202111169809 A CN 202111169809A CN 113959049 A CN113959049 A CN 113959049A
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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
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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
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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
-
- 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
- F24F2013/247—Active noise-suppression
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
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- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
A noise improvement control method for high load shedding comprises the following steps: responding to a system frequency reduction instruction to acquire the current compressor running frequency FdAnd a target frequency FmAnd obtaining the frequency-reduction difference delta F ═ Fd‑Fm(ii) a Obtaining load judgment information by the frequency reduction difference value delta F through a load judgment model; executing load reduction operation according to the load judgment information, wherein the load reduction operation comprises the following steps: and communicating the other connecting pipeline with the throttling element pipeline to enable the refrigerant to flow from the air conditioner indoor unit pipeline to the outdoor unit pipeline without passing through the throttling element. When the frequency reduction operation is needed, the invention passes the frequency change value of the running frequency and the target frequency and the internal machineThe judgment of the temperature of the pipeline controls the whole machine to firstly reduce the load and then reduce the frequency of the compressor, so that the condition that abnormal noise is easily excited through a fixed frequency resonance point when the frequency is reduced under a high-pressure and high-load state can be effectively avoided, the requirement of a user on comfort is met, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a noise improvement control method for high-load shedding and a variable frequency air conditioner system.
Background
Under the condition of low-load operation of the air conditioning system, when an external machine passes through a pipeline or a shell for fixing frequency, the external machine does not excite the abnormal sound of the shell because the operation load of the whole machine is low and the vibration is small; however, under high load, when the outer unit is operated, a large casing rattle or other abnormal noise may be generated through the resonance section.
In the normal heating operation process of the outer machine, when load changes, the load changes, for example, the super-strong gear of the inner machine is changed into a mute gear, an air inlet and an air outlet are blocked, the inner machine cannot effectively dissipate heat, the temperature of a pipe of the inner machine is quickly increased at the moment, and the load is increased (abnormal sound is excited if the frequency is reduced at the moment and passes through a fixed frequency point). In addition, in the process of system triggering frequency reduction, due to sudden load change, frequency change is slower than pressure change, the temperature of an inner machine pipe is always kept in a higher state, an outer machine is kept in a high-load state, and abnormal noise exists when frequency reduction passes through a resonance point. The invention provides a noise improvement control method for high load shedding and a variable frequency air conditioning system to improve the current situation.
Disclosure of Invention
Aiming at the problem that abnormal noise is easy to be excited by a fixed frequency resonance point when the air conditioning system is subjected to frequency reduction under a high-voltage and high-load state, the invention provides a high-load reduction noise improvement control method and a variable frequency air conditioning system.
In order to achieve the purpose, the invention adopts the following technical scheme: a noise improvement control method for high load shedding comprises the following steps:
responding to a system frequency reduction instruction to acquire the current compressor running frequency FdAnd a target frequency FmAnd obtaining the frequency-reduction difference delta F ═ Fd-Fm；
Obtaining load judgment information by the frequency reduction difference value delta F through a load judgment model;
executing load reduction operation according to the load judgment information, wherein the load reduction operation comprises the following steps:
and communicating the other connecting pipeline with the throttling element pipeline to enable the refrigerant to flow from the air conditioner indoor unit pipeline to the outdoor unit pipeline without passing through the throttling element.
Preferably, the load judgment model includes at least one stage of judgment step, and the first judgment step includes:
judging whether the frequency reduction difference value delta F is larger than a preset frequency change value or not;
if so, obtaining load judgment information, and executing load reduction operation if the load change is large;
if not, executing a second judgment step.
Preferably, the second judging step includes:
obtaining temperature T of air conditioner indoor unit pipelinenThe temperature Tn is obtained by a temperature sensing element arranged in an air conditioner indoor unit pipeline;
judging the temperature TnWhether the temperature is greater than a preset temperature value or not;
if so, obtaining load judgment information, judging that the load is larger, and executing load reduction operation;
if not, the compressor normally operates and reduces the frequency to the target frequency.
Preferably, the load reduction operation includes:
and connecting a connecting pipeline for connecting the pipeline of the air conditioner internal unit and the pipeline of the air conditioner external unit so as to enable the refrigerant to flow from the pipeline of the air conditioner internal unit to the pipeline of the external unit without passing through the throttling element pipeline to achieve the load reduction and pressure relief effects, wherein the connecting pipeline and the throttling element pipeline are arranged between the pipeline of the air conditioner internal unit and the pipeline of the air conditioner external unit in parallel.
Preferably, the method receives a frequency reduction request or identifies a frequency reduction instruction triggered by the frequency reduction requirement when the response system frequency reduction instruction is that the air conditioning system is in the heating operation condition.
Preferably, the method comprises:
triggering a load reduction operation request when the load judgment information obtained according to the load judgment model is that the load change is large and/or the load is large;
responding to the load reduction operation request, and opening an electromagnetic valve configured on the connecting pipeline to enable the refrigerant to flow through the connecting pipeline;
and receiving a signal that the running frequency of the compressor is reduced to a target frequency and/or the temperature of the pipeline of the internal machine is lower than a preset temperature value, and closing the electromagnetic valve to enable the refrigerant to be regulated through the pipeline of the throttling element and restore the normal running working condition.
Preferably, the load judgment model includes:
and judging whether the frequency reduction difference value delta F is larger than a preset frequency change value, wherein the preset frequency change value is 20 Hz.
Preferably, the load judgment model includes:
judging temperature T of air conditioner indoor unit pipelinenWhether the temperature is higher than a preset temperature value, wherein the preset temperature value is 50 ℃.
In another aspect, an inverter air conditioning system includes:
the response module is used for responding to the user frequency reduction request;
the acquisition module is used for acquiring the compression operating frequency and the preset target frequency of the variable frequency air conditioning system and the temperature of an internal machine pipeline;
the judging module is used for judging the parameters obtained by the obtaining module according to the load judging model to obtain load judging information;
and the control module is used for controlling the flow of the refrigerant according to the load judgment information so as to control the load operation conditions of the pipeline of the inner machine and the pipeline of the outer machine of the air conditioner.
Preferably, when the control module determines that the load change is large and/or the load is large according to the load determination information, the control module controls the electromagnetic valve of the connecting pipeline so that the refrigerant flows from the pipeline of the air conditioner internal unit to the pipeline of the external unit without passing through the throttling element pipeline, so as to achieve the effects of pressure relief and stable high-low pressure difference.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the working condition of the pipeline of the indoor unit of the air conditioner is sensed for many times when the system frequency reduction instruction is responded through the load judgment model, when the frequency reduction operation is required, the load reduction of the whole machine is controlled firstly and then the frequency of the compressor is reduced through the judgment of the frequency change value of the operating frequency and the target frequency and the temperature of the pipeline of the indoor unit, the condition that abnormal noise is easily excited through a fixed frequency resonance point when the frequency is reduced under a high-pressure high-load state can be effectively avoided, the requirement of a user on comfort is met, and the user experience is improved.
Drawings
In order to more clearly illustrate the technical solution, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic flow chart of the present invention.
Fig. 2 is a schematic view of the structure of the connecting pipe of the present invention.
Detailed Description
For a clear and complete understanding of the technical solutions, the present invention will now be further described with reference to the embodiments and the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, a noise improvement control method for high load shedding includes:
s1 responds to a system frequency reduction instruction, which is a frequency reduction instruction triggered by receiving a frequency reduction request or identifying a frequency reduction requirement when the air conditioning system is in a heating operation condition, when the air conditioning system is in a heating operation process, load changes, such as the rotating speed of a fan is reduced, a mute gear is changed from a super-strong gear, an air inlet and an air outlet are blocked, an internal machine cannot effectively dissipate heat, the temperature of an internal machine pipe is quickly increased, and the load is increased (abnormal sound is excited if the frequency reduction passes through a fixed frequency point). The system receives a user frequency reduction request or identifies the operation needing frequency reduction and triggers the generation of a frequency reduction instruction.
S2 obtaining the current compressor running frequency FdAnd a target frequency FmAnd calculating the frequency reduction difference value delta F ═ F through a formulad-Fm。
S3, obtaining load judgment information by the frequency reduction difference value delta F through a load judgment model:
the load judgment model comprises two judging steps, wherein the first judging step comprises the following steps:
judging whether the frequency reduction difference value delta F is greater than 20Hz, wherein 20Hz is an example value, and the actual production and use can be determined according to the fixed frequency and vibration conditions of an outdoor unit;
if so, obtaining load judgment information, and executing load reduction operation if the load change is large;
if not, executing a second judging step, wherein the second judging step comprises the following steps:
obtaining temperature T of air conditioner indoor unit pipelinenAnd determining the temperature TnWhether the temperature Tn is higher than 50 ℃ or not is judged, and the temperature Tn is obtained by a temperature sensing bulb arranged on an air conditioner internal unit pipeline;
if so, obtaining load judgment information, judging that the load is larger, and executing load reduction operation;
if not, the normal operation of the compressor is reduced to the target frequency FmAnd the heating capacity is met.
S4, when the load change is large and/or the load is large according to the load judgment information, executing a load reduction operation, where the load reduction operation includes:
and communicating the other connecting pipeline with the throttling element pipeline to enable the refrigerant to flow from the air conditioner indoor unit pipeline to the outdoor unit pipeline without passing through the throttling element.
Specifically, as shown in fig. 2, the connecting pipe 3 connecting the air conditioner internal unit pipe 1 and the air conditioner external unit pipe 2 has an electromagnetic valve 4, and the connecting pipe 3 and the throttling element pipe 5 are arranged in parallel between the air conditioner internal unit pipe 1 and the air conditioner external unit pipe 2.
And responding to the load reduction operation request, and opening an electromagnetic valve arranged on the connecting pipeline to enable the refrigerant to flow through the connecting pipeline without passing through a throttling element pipeline, so that the pressure relief effect is realized, the high-low pressure difference can be balanced, and the temperature of an inner machine pipe of the air conditioner can be reduced.
And receiving a signal that the running frequency of the compressor is reduced to a target frequency and/or the temperature of the inner machine pipeline is lower than 50 ℃, and closing the electromagnetic valve to enable the refrigerant to be subjected to normal throttling regulation through a throttling element pipeline so as to recover the normal running working condition.
In the frequency reduction process of heating operation, after the operating condition of the air conditioner is obtained through the judgment model, the load of the whole air conditioner is reduced firstly (through the bypass effect), and then the frequency of the compressor is reduced, so that the high-pressure high-load state can be effectively avoided, the abnormal noise is easily excited through the fixed frequency resonance point during frequency reduction, the requirement of a user on comfort is met, and the user experience is improved.
The second embodiment:
the variable frequency air conditioning system comprises the following modules for executing the control method of the first embodiment:
the response module is used for responding to the user frequency reduction request;
the acquisition module is used for acquiring the compression operating frequency and the preset target frequency of the variable frequency air conditioning system and the temperature of an internal machine pipeline;
the judging module is used for judging the parameters obtained by the obtaining module according to the load judging model to obtain load judging information;
and the control module is used for controlling the flow of the refrigerant according to the load judgment information so as to control the load operation conditions of the pipeline of the inner machine and the pipeline of the outer machine of the air conditioner. And when the control module judges that the load change is large and/or the load is large according to the load judgment information, the control module controls the electromagnetic valve of the connecting pipeline so that the refrigerant flows from the pipeline of the air conditioner internal unit to the pipeline of the external unit without passing through the throttling element pipeline, so as to achieve the effects of pressure relief and stable high-low pressure difference.
The above disclosure is intended to be illustrative of one or more of the preferred embodiments of the present invention and is not intended to limit the invention in any way, which is equivalent or conventional to one skilled in the art and which is intended to cover all modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims.
Claims (10)
1. A noise improvement control method for high load shedding is characterized by comprising the following steps:
responding to a system frequency reduction instruction to acquire the current compressor running frequency FdAnd a target frequency FmAnd obtaining the frequency-reduction difference delta F ═ Fd-Fm；
Obtaining load judgment information by the frequency reduction difference value delta F through a load judgment model;
executing load reduction operation according to the load judgment information, wherein the load reduction operation comprises the following steps:
and communicating the other connecting pipeline with the throttling element pipeline to enable the refrigerant to flow from the air conditioner indoor unit pipeline to the outdoor unit pipeline without passing through the throttling element.
2. The noise improvement control method of claim 1, wherein the load judgment model comprises at least one stage of judgment steps, and the first judgment step comprises:
judging whether the frequency reduction difference value delta F is larger than a preset frequency change value or not;
if so, obtaining load judgment information, and executing load reduction operation if the load change is large;
if not, executing a second judgment step.
3. The noise improvement control method of claim 2, wherein the second determining step comprises:
obtaining temperature T of air conditioner indoor unit pipelinenThe temperature Tn is obtained by a temperature sensing element arranged in an air conditioner indoor unit pipeline;
judging the temperature TnWhether the temperature is greater than a preset temperature value or not;
if so, obtaining load judgment information, judging that the load is larger, and executing load reduction operation;
if not, the compressor normally operates and reduces the frequency to the target frequency.
4. A noise improvement control method of high load shedding according to claim 2 or 3, wherein the load shedding operation comprises:
and connecting a connecting pipeline for connecting the pipeline of the air conditioner internal unit and the pipeline of the air conditioner external unit so as to enable the refrigerant to flow from the pipeline of the air conditioner internal unit to the pipeline of the external unit without passing through the throttling element pipeline to achieve the load reduction and pressure relief effects, wherein the connecting pipeline and the throttling element pipeline are arranged between the pipeline of the air conditioner internal unit and the pipeline of the air conditioner external unit in parallel.
5. The noise improvement control method for high load shedding according to claim 1, wherein: the method receives a frequency reduction request or identifies a frequency reduction instruction triggered by the frequency reduction requirement when the response system frequency reduction instruction is the air-conditioning system under the heating operation condition.
6. A method of noise improvement control for high load shedding according to claim 1, wherein said method comprises:
triggering a load reduction operation request when the load judgment information obtained according to the load judgment model is that the load change is large and/or the load is large;
responding to the load reduction operation request, and opening an electromagnetic valve configured on the connecting pipeline to enable the refrigerant to flow through the connecting pipeline;
and receiving a signal that the running frequency of the compressor is reduced to a target frequency and/or the temperature of the pipeline of the internal machine is lower than a preset temperature value, and closing the electromagnetic valve to enable the refrigerant to be regulated through the pipeline of the throttling element and restore the normal running working condition.
7. The method as claimed in claim 1, wherein the load judgment model comprises:
and judging whether the frequency reduction difference value delta F is larger than a preset frequency change value, wherein the preset frequency change value is 20 Hz.
8. The method as claimed in claim 1, wherein the load judgment model comprises:
judging temperature T of air conditioner indoor unit pipelinenWhether the temperature is higher than a preset temperature value, wherein the preset temperature value is 50 ℃.
9. An inverter air conditioning system, comprising:
the response module is used for responding to the user frequency reduction request;
the acquisition module is used for acquiring the compression operating frequency and the preset target frequency of the variable frequency air conditioning system and the temperature of an internal machine pipeline;
the judging module is used for judging the parameters obtained by the obtaining module according to the load judging model to obtain load judging information;
and the control module is used for controlling the flow of the refrigerant according to the load judgment information so as to control the load operation conditions of the pipeline of the inner machine and the pipeline of the outer machine of the air conditioner.
10. The inverter air conditioning system of claim 9, wherein:
and when the control module judges that the load change is large and/or the load is large according to the load judgment information, the control module controls the electromagnetic valve of the connecting pipeline so that the refrigerant flows from the pipeline of the air conditioner internal unit to the pipeline of the external unit without passing through the throttling element pipeline, so as to achieve the effects of pressure relief and stable high-low pressure difference.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111169809.3A CN113959049A (en) | 2021-10-08 | 2021-10-08 | Noise improvement control method for high-load shedding and variable-frequency air conditioning system |
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| CN202111169809.3A CN113959049A (en) | 2021-10-08 | 2021-10-08 | Noise improvement control method for high-load shedding and variable-frequency air conditioning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115235097A (en) * | 2022-08-08 | 2022-10-25 | 宁波奥克斯电气股份有限公司 | Control method of air conditioner and air conditioner |
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| CN104033996A (en) * | 2014-07-04 | 2014-09-10 | 珠海格力电器股份有限公司 | Air conditioner indoor unit running noise control method and system |
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