CN110701057A - Dual-system screw machine anti-beat vibration noise control method, computer readable storage medium and system - Google Patents
Dual-system screw machine anti-beat vibration noise control method, computer readable storage medium and system Download PDFInfo
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- CN110701057A CN110701057A CN201910866375.9A CN201910866375A CN110701057A CN 110701057 A CN110701057 A CN 110701057A CN 201910866375 A CN201910866375 A CN 201910866375A CN 110701057 A CN110701057 A CN 110701057A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/06—Silencing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/08—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the rotational speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/28—Safety arrangements; Monitoring
Abstract
The invention provides a double-system screw machine anti-beat vibration noise control method, a computer readable storage medium and a system. The noise prominence ratio is an objective evaluation parameter in the sound quality, the current noise condition can be objectively and accurately reflected, the current compressor noise condition is obtained through judgment of the noise prominence ratio and is correspondingly adjusted, the beat vibration noise of the compressor can be optimized, and the sound quality is improved.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a double-system screw machine anti-beat vibration noise control method, a computer readable storage medium and a system.
Background
The compressor of the screw machine has high noise, and common installation places are arranged on the roof, but the sequence is established successively along with floors, so that the heights of the floors are different, and the noise of the screw machine is often complained by residents on opposite floors to be high, so that the sound quality of products is influenced. Aiming at installing two sets of double-system units, when the excitation amplitude and the frequency of two sound sources are close, the two sound sources are superposed and then integrally show the abnormal sound phenomenon that the vibration amplitude changes periodically at a low frequency, because the abnormal sound phenomenon has the beat attribute, people can sensitively perceive the abnormal sound phenomenon, the judgment of users on the air conditioner sound quality can be directly influenced, and the serious after-sale complaint risk exists.
The main noise source of the screw machine is a compressor, when the noise frequencies and amplitudes of the two compressors of the system 1 and the system 2 are close, obvious beat vibration noise can be generated, and the main factor of beat vibration noise generated by the screw machine is the frequency doubling frequency 1 of the compressor.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method and a device for controlling the beat vibration noise prevention of a dual-system screw machine, which are used for adjusting the beat vibration noise generation condition according to the actual running condition of the machine set and balancing the water temperature of the system through a plate changing device, so that the beat vibration noise is optimized in the early stage without influencing the performance of the machine set.
In order to achieve the purpose, the invention adopts the following technical scheme:
a double-system screw machine anti-beat vibration noise control method is characterized in that noise data of compressors in double systems are detected in real time, a noise saliency ratio is extracted to judge whether the frequency of the compressors in the double systems needs to be adjusted in the current state, and a corresponding operation instruction is sent to a compressor controller. The noise prominence ratio is an objective evaluation parameter in the sound quality, the current noise condition can be objectively and accurately reflected, the current compressor noise condition is obtained through judgment of the noise prominence ratio and is correspondingly adjusted, the beat vibration noise of the compressor can be optimized, and the sound quality is improved.
Further, the judgment of the extracted noise saliency ratio specifically is: when the noise protrusion ratio is larger than X dB, judging that the noise condition is unqualified; and when the noise saliency ratio is less than X dB, judging that the noise condition is qualified, wherein X is a preset value and belongs to [7,9 ]. Through setting of the preset value and judgment and comparison of the noise saliency ratio, accurate noise conditions can be obtained through direct comparison and judgment of data, adjustment is carried out according to the accurate noise conditions, and control accuracy is higher.
Further, the adjusting the frequency of the compressor in the dual system specifically includes: and under the condition that the noise condition is judged to be unqualified, adjusting the frequency of one compressor in the double systems to increase A Hz, and reducing the frequency of the other compressor to decrease A Hz, wherein A is a preset value and belongs to [1, 5 ]. The condition that the compressor took place the beat noise of shaking under close frequency is more, can effectively reduce the beat noise probability of taking place of shaking through the mistake frequency of compressor, and this kind of adjustment mode is most direct effective, need not increase unnecessary device of making an uproar moreover, and the practicality is stronger.
Furthermore, the control method also detects the temperature data of the water outlet pipes in the double systems in real time, and judges whether the water temperatures of the two systems need to be adjusted or not according to the temperature data after the frequency of the compressor is adjusted. The water temperature of the water outlet pipe of the detection system is adjusted in a adaptability mode, the water temperature balance of the two systems is guaranteed, and the performance of the unit is not affected while the beat vibration noise is optimized.
Further, the real-time detection of the temperature data of the water outlet pipe in the dual system specifically includes: one water outlet pipe in the double system is T1 'in temperature and the other water outlet pipe is T2'; the judgment according to the temperature data is as follows: when T1 '< T1 +/-a ℃ or T2' < T2 +/-a ℃, the water temperatures of the two systems do not need to be adjusted, a is a preset value, a belongs to [1, 5], and T1 and T2 are preset target water outlet temperature values. When the actual water temperature of the water outlet pipe does not change much, the performance difference of the two systems is small, adjustment is not needed under the condition, the current operation state is maintained, and energy is not wasted to carry out unnecessary control.
Further, the determining according to the temperature data specifically includes: when T1 '> T1 +/-a ℃ or T2' > T2 +/-a ℃, the water temperature of the two systems is judged to need to be adjusted, and corresponding control commands are sent to relevant components. When the water temperature of the water outlet pipe changes greatly, the performance difference of the two systems under the front current condition is larger than the preset range, and under the condition, the water temperatures of the two systems need to be controlled and adjusted to reach a balanced state, so that the performance difference of the two systems is small, and the stable and reliable operation of the whole system is ensured.
Further, the corresponding control instruction specifically includes: and controlling the electromagnetic valves of the two water outlet pipes to be closed so that the water of the two systems enters the plate replacing device to perform balanced heat exchange. Water passing through the two systems can enter the plate exchanging device for heat exchanging treatment, and water temperature balance of the two systems can be ensured when water after heat exchanging treatment is circulated back to the systems, namely, the performance of the two systems can not have large difference.
A computer-readable storage medium storing a computer program that when invoked by a processor implements the dual-system screw machine anti-rattle noise control method of any one of the above.
A dual system screw machine anti-rattle noise control system comprising a processor and a memory, the memory for storing a computer program, characterized in that: the computer program is called by the processor to realize the anti-beat vibration noise control method of the dual-system screw machine.
The system comprises a first system, a second system, a noise sensor, a board replacing device, a first temperature sensor, a second temperature sensor, a first electromagnetic valve and a second electromagnetic valve, wherein the noise sensor is arranged between the first system and the second system and used for detecting noise data of a compressor, the first system further comprises a first water outlet pipe, the second system further comprises a second water outlet pipe, the first temperature sensor is arranged at the upper end of the first water outlet pipe, the first electromagnetic valve is arranged at the lower end of the first water outlet pipe, the second temperature sensor is arranged at the upper end of the second water outlet pipe, the second electromagnetic valve is arranged at the lower end of the second water outlet pipe, the first water outlet pipe is provided with a branch circuit connected to the board replacing device, the second water outlet pipe is provided with a branch circuit connected to the board replacing device, and a processor is respectively connected with the first system, the second system, the, The noise sensor, the first temperature sensor, the second temperature sensor, the first electromagnetic valve and the second electromagnetic valve are connected through signals. Noise data detected by the noise sensor are sent to a processor, the processor calculates and interprets according to the noise data and sends corresponding control signals to a first system and a second system, water temperature data detected by a first temperature sensor and a second temperature sensor are sent to the processor, and the processor sends corresponding control signals to a first electromagnetic valve and a second electromagnetic valve according to the judgment; the beat vibration noise of the air conditioner is effectively controlled while the performance of the unit is not influenced, so that the unit has the function of automatically optimizing the sound quality.
An air conditioner comprises a control system, and is characterized in that the control system is specifically the double-system screw machine anti-beat vibration noise control system.
The double-system screw machine anti-beat vibration noise control method, the computer readable storage medium and the system provided by the invention have the beneficial effects that: detecting and judging whether beat vibration noise is generated or not through the acquired noise data, and if no problem exists, operating according to the original control logic; if there is a problem, automatically adjusting the compressor frequency; and the water temperature of the system is balanced by the plate changing device arranged in the middle of the double systems, so that the beat vibration noise of the compressor is effectively controlled while the performance of the unit is not influenced, and the unit has the function of automatically optimizing the sound quality.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic diagram of a control system according to the present invention.
In the figure: 1. a first system; 2. a second system; 3. a noise sensor; 4. a processor; 5. a first water outlet pipe; 6. a second water outlet pipe; 7. a first temperature sensor; 8. a second temperature sensor; 9. a first solenoid valve; 10. a second solenoid valve; 11. and (4) a plate replacing device.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of the present invention.
Example 1: a double-system screw machine anti-beat vibration noise control method.
A double-system screw machine anti-beat vibration noise control method comprises the following specific steps:
the method comprises the steps that a noise sensor 3 is arranged in the middle of two systems of the screw machine, the sound pressure level noise condition can be detected at any time, judgment is carried out according to the noise projection ratio of detection data, a pre-judgment value X dB is set (the projection ratio is larger than XdB, the screw machine is unqualified, and the projection ratio is smaller than X dB, the screw machine is qualified, wherein X belongs to [7,9], the double-system screw machine has obvious beat vibration noise when the projection ratio is larger than 9dB, so that X belongs to [ 9] is preferred, if the double-system screw machine is qualified, the double-system screw machine operates according to the original logic, if the double-system screw machine is unqualified, the first system 1 compressor frequency + A Hz and the second system 2 compressor frequency-A Hz (A belongs to [1, 5] are adjusted, and the beat vibration noise is optimized because the compressor frequency change has large noise correlation and the unit is.
The performance of the unit is not affected while the beat vibration noise is optimized, so that the plate replacing device 11 is installed in a double-system pipeline, after the beat vibration noise is optimized by adjusting the frequency of a compressor of the first system 1 plus A Hz and the frequency of a compressor of the second system 2 minus A Hz, the capacity of the first system 1 is higher, the capacity of the second system 2 is lower, the water temperature output by the first system 1 is higher than the target temperature, the water temperature output by the second system 2 is lower than the target temperature, the water temperatures of the two systems can be balanced through the plate replacing device 11, and the difference between the actual temperature value and the target temperature value is almost guaranteed.
Temperature sensors are arranged at water outlet pipes of the first system 1 and the second system 2, the change conditions of target temperature values T1 and T2, actual temperature values T1 'and T2' of the first system 1 and the second system 2 are monitored in real time, when the temperature of T1 'is less than or equal to T1 +/-2 ℃ or the temperature of T2' is less than or equal to T2 +/-2 ℃, the operation is controlled according to original logic, when the temperature of T1 'is greater than T1 +/-2 ℃ or the temperature of T2' is greater than T2 +/-2 ℃, the normally open first electromagnetic valve 9 and the normally open second electromagnetic valve 10 are closed, a water channel of the first system 1 and the second system 2 enters the plate-changing device 11 for balanced heat exchange, the influence of adjusting the frequency of a compressor on the performance of a unit is eliminated, and the closed-loop. Through the logic control, the automatic noise reduction effect of the air conditioner is achieved under the condition that the performance of the whole air conditioner is not influenced, and the sound quality of the air conditioner is effectively improved.
The noise protrusion ratio is calculated as follows:
wherein L isM-intermediate critical band noise; l isL-lower critical band noise; l isU-upper critical band noise; Δ fL-lower critical band bandwidth.
Example 2: a double-system screw machine anti-beat vibration noise control system.
A double-system screw machine anti-beat vibration noise control system comprises a processor 4, a first system 1, a second system 2, a noise sensor 3, a plate changing device 11, a first temperature sensor 7, a second temperature sensor 8, a first electromagnetic valve 9 and a second electromagnetic valve 10, wherein the noise sensor 3 is arranged between the first system 1 and the second system 2 and is used for detecting noise data of a compressor, the first system 1 further comprises a first water outlet pipe 5, the second system 2 further comprises a second water outlet pipe 6, the first temperature sensor 7 is arranged at the upper end of the first water outlet pipe 5, the first electromagnetic valve 9 is arranged at the lower end of the first water outlet pipe 5, the second temperature sensor 8 is arranged at the upper end of the second water outlet pipe 6, the second electromagnetic valve 10 is arranged at the lower end of the second water outlet pipe 6, the first water outlet pipe 5 is provided with branch circuits connected to the plate changing device 11, the second water outlet pipe 6 is provided with a branch circuit connected to the board replacing device 11, and the processor 4 is respectively connected with the first system 1, the second system 2, the noise sensor 3, the first temperature sensor 7, the second temperature sensor 8, the first electromagnetic valve 9 and the second electromagnetic valve 10 through signals. Noise data detected by the noise sensor 3 is sent to the processor 4, the processor 4 calculates interpretation according to the noise data and sends corresponding control signals to the first system 1 and the second system 2, water temperature data detected by the first temperature sensor 7 and the second temperature sensor 8 is sent to the processor 4, and the processor 4 sends corresponding control signals to the first electromagnetic valve 9 and the second electromagnetic valve 10 according to the judgment.
In this embodiment, the detection and determination method is the same as that described in embodiment 1, and the specific method of water heat exchange balance is as follows: closing the first solenoid valve 9 and the second solenoid valve 10, as can be known from figure 2, water flows from the branch above the first solenoid valve 9 and the second solenoid valve 10 to the plate exchanging device 11 for the heat exchange treatment of the water, which flows out of the plate exchanging device 11 to circulate in the first system 1 and the second system 2. The system effectively controls the beat vibration noise of the compressor without influencing the performance of the unit, so that the unit has the function of automatically optimizing the sound quality.
Example 3: a computer readable storage medium.
A computer-readable storage medium for storing a computer program that, when invoked by a processor, implements the method of dual-system screw machine anti-rattle noise control described in embodiment 1.
Example 4: an air conditioner.
An air conditioner comprises a control system, and is characterized in that the control system is specifically the double-system screw machine anti-beat vibration noise control system in embodiment 2.
The above description is only for the preferred embodiment of the present invention, but the present invention should not be limited to the embodiment and the disclosure of the drawings, and therefore, all equivalent or modifications that do not depart from the spirit of the present invention are intended to fall within the scope of the present invention.
Claims (11)
1. A double-system screw machine anti-beat vibration noise control method is characterized in that noise data of compressors in double systems are detected in real time, noise saliency is extracted to judge whether the frequency of the compressors in the double systems needs to be adjusted in the current state, and corresponding operation instructions are sent to a compressor controller.
2. The double-system screw machine anti-beat noise control method according to claim 1, characterized in that: the judgment of the extracted noise saliency ratio is specifically as follows: when the noise protrusion ratio is larger than X dB, judging that the noise condition is unqualified; and when the noise saliency ratio is less than X dB, judging that the noise condition is qualified, wherein X is a preset value and belongs to [7,9 ].
3. The double-system screw machine anti-beat noise control method according to claim 2, characterized in that: the adjusting of the frequency of the compressor in the dual system is specifically as follows: and under the condition that the noise condition is judged to be unqualified, adjusting the frequency of one compressor in the double systems to increase A Hz, and reducing the frequency of the other compressor to decrease A Hz, wherein A is a preset value and belongs to [1, 5 ].
4. The double-system screw machine anti-beat noise control method according to claim 1, characterized in that: the control method also detects the temperature data of the water outlet pipes in the double systems in real time, and judges whether the water temperatures of the two systems need to be adjusted or not according to the temperature data after the frequency of the compressor is adjusted.
5. The double-system screw machine anti-beat noise control method according to claim 4, characterized in that: the real-time detection of the temperature data of the water outlet pipe in the dual system specifically comprises the following steps: one water outlet pipe in the double system is T1 'in temperature and the other water outlet pipe is T2'; the judgment according to the temperature data is specifically as follows: when T1 '< T1 +/-a ℃ or T2' < T2 +/-a ℃, the water temperatures of the two systems do not need to be adjusted, a is a preset value, a belongs to [1, 5], and T1 and T2 are preset target water outlet temperature values.
6. The double-system screw machine anti-rattling noise control method according to claim 5, characterized in that: the judgment according to the temperature data is specifically as follows: when T1 '> T1 +/-a ℃ or T2' > T2 +/-a ℃, the water temperature of the two systems is judged to need to be adjusted, and corresponding control commands are sent to relevant components.
7. The double-system screw machine anti-rattle noise control method according to claim 6, characterized in that: the corresponding control instruction is specifically as follows: and controlling the electromagnetic valves of the two water outlet pipes to be closed so that the water of the two systems enters the plate replacing device to perform balanced heat exchange.
8. A computer-readable storage medium storing a computer program, characterized in that: the computer program, when invoked by a processor, implements the dual system screw machine anti-rattle noise control method of any one of claims 1 to 7.
9. A dual system screw machine anti-rattle noise control system comprising a processor and a memory, the memory for storing a computer program, characterized in that: the computer program, when invoked by the processor, implements the dual system screw machine anti-rattle noise control method of any one of claims 1 to 7.
10. The dual-system screw machine anti-beat vibration noise control system according to claim 9, comprising a first system, a second system, a noise sensor, a plate changing device, a first temperature sensor, a second temperature sensor, a first solenoid valve and a second solenoid valve, wherein the noise sensor is disposed between the first system and the second system for detecting noise data of the compressor, the first system further comprises a first outlet pipe, the second system further comprises a second outlet pipe, the first temperature sensor is disposed at an upper end of the first outlet pipe, the first solenoid valve is disposed at a lower end of the first outlet pipe, the second temperature sensor is disposed at an upper end of the second outlet pipe, the second solenoid valve is disposed at a lower end of the second outlet pipe, the first outlet pipe is provided with a branch circuit connected to the plate changing device, the second outlet pipe is provided with a branch circuit connected to the plate changing device, the processor is respectively connected with the first system, the second system, the noise sensor, the first temperature sensor, the second temperature sensor, the first electromagnetic valve and the second electromagnetic valve through signals.
11. An air conditioner comprising a control system, wherein the control system is specifically the dual-system screw machine anti-rattling noise control system of any one of claims 9 to 10.
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Cited By (1)
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| CN114688687A (en) * | 2022-03-11 | 2022-07-01 | 海信（山东）空调有限公司 | Air conditioner and control method thereof |
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| CN114688687B (en) * | 2022-03-11 | 2023-10-27 | 海信空调有限公司 | Air conditioner and control method thereof |
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| CN110701057B (en) | 2021-01-29 |
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