CN114739105A - Shutdown control method and device of variable frequency compressor, storage medium and refrigerator - Google Patents
Shutdown control method and device of variable frequency compressor, storage medium and refrigerator Download PDFInfo
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- CN114739105A CN114739105A CN202210430343.6A CN202210430343A CN114739105A CN 114739105 A CN114739105 A CN 114739105A CN 202210430343 A CN202210430343 A CN 202210430343A CN 114739105 A CN114739105 A CN 114739105A
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- 238000000034 method Methods 0.000 title claims abstract description 58
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 238000004590 computer program Methods 0.000 claims description 12
- 238000004364 calculation method Methods 0.000 description 17
- 230000001133 acceleration Effects 0.000 description 8
- 238000004891 communication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2201/00—Insulation
- F25D2201/30—Insulation with respect to sound
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/02—Timing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The application provides a shutdown control method and device of a variable frequency compressor, a storage medium and a refrigerator, wherein the method comprises the following steps: receiving a shutdown control instruction; acquiring the current rotating speed and the current working power of the variable frequency compressor according to the shutdown control instruction; calculating to obtain the stop rotating speed of the variable frequency compressor according to the current working power; adjusting the current rotating speed to a shutdown rotating speed according to a preset adjusting speed; and controlling the frequency conversion compressor to close the output. This application is through the regulation to inverter compressor shut down the rotational speed for inverter compressor's shut down the rotational speed and can adapt to different environment, thereby reduce inverter compressor's shut down noise, improve user experience.
Description
Technical Field
The application belongs to the technical field of refrigerator equipment, and particularly relates to a shutdown control method and device of a variable frequency compressor, a storage medium and a refrigerator.
Background
With the development of the refrigerator industry and the improvement of the living standard of people, the refrigerator adopting the variable frequency compressor gradually becomes the main force of the market, and particularly, the variable frequency refrigerator with large volume and the embedded variable frequency refrigerator are more and more favored by people.
However, in the prior art, the frequency conversion compressor is usually shut off at the time of shutdown directly from the current rotational speed or shut off after the current rotational speed is reduced to a fixed shutdown rotational speed. The variable frequency compressor rotor has higher rotational inertia during operation, and abnormal noise of cylinder collision can occur in a direct output mode; and adopt single shut down rotational speed can't be applicable to different environment to the phenomenon that the rotor and cylinder body appear violent collision and produce and hit the jar when shutting down appears in the variable frequency compressor, leads to the variable frequency compressor obvious shut down noise to appear, influences user experience.
Disclosure of Invention
The embodiment of the application provides a shutdown control method and device of a variable frequency compressor, a storage medium and a refrigerator, so that the shutdown noise of the variable frequency compressor is reduced, and the user experience is improved.
In a first aspect, an embodiment of the present application provides a method for controlling shutdown of an inverter compressor, where the method is applied to a refrigerator, and the method includes:
receiving a shutdown control instruction;
acquiring the current rotating speed and the current working power of the variable frequency compressor according to the stop control instruction;
calculating to obtain the stop rotating speed of the variable frequency compressor according to the current working power;
adjusting the current rotating speed to the stopping rotating speed according to a preset adjusting speed;
and controlling the frequency conversion compressor to close the output.
Optionally, the calculating the stop rotation speed of the inverter compressor according to the current working power includes:
calculating to obtain the load grade of the refrigerator according to the current working power;
and calculating to obtain the stop rotating speed of the variable frequency compressor according to the load grade.
Optionally, the calculating the load level of the refrigerator according to the current working power includes:
acquiring the lowest power of the inverter compressor and the power grade of the inverter compressor;
calculating the difference value between the current working power and the lowest power to obtain a difference value result;
and calculating the ratio of the difference result to the power grade to obtain the load grade of the refrigerator.
Optionally, the calculating the stop rotation speed of the inverter compressor according to the load level includes:
acquiring a speed increment corresponding to the load grade and the lowest rotating speed of the variable frequency compressor;
calculating the product of the load grade and the lowest rate to obtain a product result;
and calculating the sum of the product result and the lowest rotating speed to obtain the stop rotating speed of the variable frequency compressor.
Optionally, after the current rotation speed is adjusted to the shutdown rotation speed according to a preset adjustment speed, the method further includes:
and controlling the variable frequency compressor to work for a preset time length at the stop rotating speed.
Optionally, after the controlling the inverter compressor to maintain the operation at the shutdown rotation speed for a preset time, the method further includes:
the variable frequency compressor obtains a current value corresponding to the rotor torque in the variable frequency compressor under the stop rotating speed;
and adjusting the current value to a target current value according to a preset current deceleration so as to adjust the rotor torque to zero.
Optionally, the method further includes:
acquiring the resonance rotating speed of the variable frequency compressor;
judging whether the shutdown rotating speed is the same as the resonance rotating speed or not;
if the rotating speeds are the same, adjusting the stopping rotating speed to a target stopping rotating speed according to a preset adjusting rotating speed;
and if the target stop rotating speed is different from the target stop rotating speed, taking the stop rotating speed as the target stop rotating speed.
In a second aspect, an embodiment of the present application further provides a shutdown control device for an inverter compressor, which is applied to a refrigerator, and the device includes:
the receiving module is used for receiving a shutdown control instruction;
the acquisition module is used for acquiring the current rotating speed and the current working power of the variable frequency compressor according to the stop control instruction;
the calculating module is used for calculating the stop rotating speed of the variable frequency compressor according to the current working power;
the adjusting module is used for adjusting the current rotating speed to the shutdown rotating speed according to a preset adjusting speed;
and the closing module is used for controlling the closing output of the variable-frequency compressor.
In a third aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed on a computer, the computer is caused to execute the shutdown control method of an inverter compressor described in any one of the above.
In a fourth aspect, embodiments of the present application further provide a refrigerator, including:
the variable frequency compressor is the variable frequency compressor as described in any one of the above items;
a memory storing a computer program;
a processor for executing the method for controlling shutdown of an inverter compressor according to any one of the preceding claims by calling the computer program stored in the memory.
The embodiment of the application provides a shutdown control method of a variable frequency compressor, which receives a shutdown control instruction; acquiring the current rotating speed and the current working power of the variable frequency compressor according to the shutdown control instruction; calculating to obtain the stop rotating speed of the variable frequency compressor according to the current working power; adjusting the current rotating speed to a stop rotating speed according to a preset adjusting speed; and controlling the frequency conversion compressor to close the output. This application is through the regulation to inverter compressor machine halt rotational speed for inverter compressor's machine halt rotational speed can adapt to different environment, makes inverter compressor can not appear rotor and the phenomenon that cylinder body violently collides the production and hit the jar when shutting down, thereby reduces inverter compressor's shut down noise, improves user experience.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. In the following description, like reference numerals denote like parts. It is obvious that the drawings in the following description are only some embodiments of the application, and that other drawings can be derived from these drawings by a person skilled in the art without inventive effort.
Fig. 1 is a first flowchart of a shutdown control method of an inverter compressor according to an embodiment of the present disclosure.
Fig. 2 is a second flowchart of a shutdown control method of an inverter compressor according to an embodiment of the present disclosure.
Fig. 3 is a schematic view of a scenario of a shutdown control method of an inverter compressor according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of a shutdown control device of an inverter compressor according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a second structure of a shutdown control device of an inverter compressor according to an embodiment of the present application.
Fig. 6 is a structural block diagram of a refrigerator provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the described embodiments are merely exemplary of some, and not all, of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The frequency that domestic appliance used in daily life is more and more, and the refrigerator has brought very big facility for people's life as the domestic appliance that people used commonly in the life, and wherein, the refrigerator that adopts inverter compressor receives people's favor gradually.
However, in the prior art, the frequency conversion compressor is usually shut off at the time of shutdown directly from the current rotational speed or shut off after the current rotational speed is reduced to a fixed shutdown rotational speed. The rotor of the variable frequency compressor has higher rotational inertia during operation, and a buffering process is not carried out before the variable frequency compressor is stopped, so that the rotor can shake violently and abnormal noise of cylinder collision can be caused by adopting a direct output mode; the adoption of a single shutdown rotating speed cannot be suitable for different environments, for example, under the conditions of high ring temperature and high load, the fixed shutdown rotating speed is relatively low, the exhaust pressure cannot be overcome, so that the rotor is forced to recoil and violently collide with the cylinder body when the frequency conversion compressor is shut down, and the generated noise is relatively high.
In order to solve the problem of noise of the variable frequency compressor during shutdown in the prior art, the embodiment of the application provides a shutdown control method, a shutdown control device, a storage medium and a refrigerator of the variable frequency compressor. Referring to fig. 1, fig. 1 is a first flowchart illustrating a shutdown control method for an inverter compressor according to an embodiment of the present application. The inverter compressor can be applied to a refrigerator, and the specific flow of the method can be as follows:
101, receiving a shutdown control command.
The inverter compressor in this embodiment may be an inverter compressor driven by an integrated inverter hardware controller, and usually, the inverter compressor is driven by 6 IGBT modules. The frequency conversion compressor can be arranged in the refrigerator, the refrigerator can be provided with a control device such as a processor, the processor is electrically connected with the frequency conversion compressor, and the processor can send a control signal carried by a stop control instruction to the frequency conversion compressor after receiving the stop control instruction sent by a user so that the frequency conversion compressor can receive the stop control instruction.
The refrigerator can be provided with a physical key or a virtual key, a user can send a shutdown control signal to the processor through touching the physical key or the virtual key, or the refrigerator can be further provided with a sound collection device such as a microphone, the user sends the shutdown control signal to the processor in a voice mode, or the refrigerator can be further provided with a wireless communication module, the wireless communication module can be in wireless communication connection with external equipment, and the user can send the shutdown control signal to the processor through the external equipment such as a smart phone.
And 102, acquiring the current rotating speed and the current working power of the variable frequency compressor according to the stop control instruction.
And after the variable frequency compressor receives the stop control instruction, acquiring the current rotating speed and the current working power of the variable frequency compressor according to the stop control instruction. The refrigerator can be further provided with a sensor assembly, the sensor assembly can be electrically connected with the variable frequency compressor, or the sensor assembly is arranged inside the variable frequency compressor, and the current rotating speed and the current working power of the variable frequency compressor can be acquired through the sensor assembly.
And 103, calculating to obtain the stop rotating speed of the variable frequency compressor according to the current working power.
After the current working power of the inverter compressor is obtained, the load grade of the refrigerator can be obtained through calculation according to the current working power of the inverter compressor, and the stop rotating speed of the inverter compressor can be obtained through calculation according to the load grade of the refrigerator.
The load level of the refrigerator can indicate the number of articles stored in the refrigerating chamber and the freezing chamber of the refrigerator. The higher the load grade of the refrigerator is, the more the load of the refrigerator is; the lower the load level of the refrigerator, the less the load of the refrigerator. For example, the load level of the refrigerator may be represented by G, and when G is equal to 5, it means that the refrigerator includes 6 load levels of 0, 1, 2, 3, 4, and 5.
Specifically, the manner of calculating the load level of the refrigerator may be: acquiring the lowest power of the inverter compressor and the power grade of the inverter compressor; calculating the difference value between the current working power and the lowest power to obtain a difference value result; and calculating the ratio of the difference result to the power grade to obtain the load grade of the refrigerator.
In some embodiments, the formula for calculating the load level of the refrigerator may be: and G is [ (P-Pmin)/Pdelta ], wherein G is the load grade of the refrigerator, P is the current working power of the inverter compressor, Pmin is the lowest power of the inverter compressor obtained by actual test, and Pdelta is the power grade of the corresponding inverter compressor under the load grade. The lowest power of the variable frequency compressor can be the compressor power when the refrigerator is in the zero load stable operation under the environment temperature of 5 ℃, the rotating speed of the variable frequency compressor is 1200rpm, the working gear of the refrigerator is the weakest gear temperature, and the refrigerator is in the zero load stable operation; the highest power of the inverter compressor can be the compressor power when the inverter compressor is at the ring temperature of 43 ℃, the rotating speed of the inverter compressor is 4500rpm, the working gear of the refrigerator is the highest gear temperature, and the refrigerator is in full-load stable operation.
After the load grade of the refrigerator is obtained through the calculation of the formula, the stop rotating speed of the variable frequency compressor can be obtained through calculation according to the load grade. Specifically, the speed increment corresponding to the load grade of the refrigerator and the lowest rotating speed of the variable frequency compressor can be obtained; calculating the product of the load grade and the lowest rotating speed to obtain a product result; and obtaining the stop rotating speed of the variable frequency compressor according to the sum of the product result and the lowest rotating speed.
In some embodiments, the formula for calculating the shutdown speed of the inverter compressor may be: g × Vdelta + Smin, where S is the stop rotation speed of the inverter compressor, Vdelta is the corresponding speed increment at the load level, and the speed increment may be set to 600; smin is the lowest rotating speed of the inverter compressor, and can be 1200rpm, and the stop rotating speed of the inverter compressor is greater than or equal to the lowest rotating speed of the inverter compressor. It should be noted that, in the process of adjusting the stop rotation speed of the inverter compressor, the stop rotation speed cannot be adjusted to be lower than the minimum rotation speed of the inverter compressor, and if the stop rotation speed is lower than the minimum rotation speed, obvious fluctuation of the rotor torque occurs to generate large noise, and the inverter compressor is damaged in long-term operation.
And 104, adjusting the current rotating speed to the stop rotating speed according to a preset adjusting speed.
After the stop rotating speed of the variable frequency compressor is obtained through calculation, the current rotating speed of the variable frequency compressor can be adjusted to the stop rotating speed according to the preset adjusting speed. The preset adjustment speed may include acceleration and deceleration, for example, the acceleration may be 1000rpm/s or the deceleration may be 1000 rpm/s. It should be noted that the preset adjustment speed may be set according to different inverter compressors, and is not limited herein.
Specifically, if the current rotating speed of the variable frequency compressor is greater than the stop rotating speed, the variable frequency compressor is controlled to decelerate to the stop rotating speed according to the deceleration of the preset adjusting speed; and if the current rotating speed of the variable frequency compressor is less than the stop rotating speed, controlling the variable frequency compressor to accelerate to the stop rotating speed according to the acceleration of the preset adjusting speed.
And 105, controlling the output of the inverter compressor to be closed.
After the current rotating speed of the variable frequency compressor is adjusted to the stop rotating speed, the variable frequency compressor can be controlled to close output, so that the stop control of the variable frequency compressor is realized. Specifically, the output of the inverter compressor may be controlled to be off by an FOC controller within the inverter compressor.
As can be seen from the above, in this embodiment, the shutdown control instruction is received by controlling the inverter compressor, the current rotating speed and the current working power of the inverter compressor are obtained according to the shutdown control instruction, the shutdown rotating speed of the inverter compressor is obtained by calculating according to the current working power, the current rotating speed is adjusted to the shutdown rotating speed according to the preset adjustment speed, and the inverter compressor is controlled to close the output, so as to implement the shutdown control on the inverter compressor. This embodiment is through the fixed rotational speed of shutting down with frequency conversion compressor among the prior art update to changeable rotational speed of shutting down to make frequency conversion compressor's the rotational speed of shutting down can be applicable to more application scenes, thereby reduced frequency conversion compressor's shut down noise, promoted user experience.
In order to further reduce the shutdown noise of the inverter compressor during shutdown, the application also provides another embodiment. Referring to fig. 2, fig. 2 is a second flowchart illustrating a shutdown control method for an inverter compressor according to an embodiment of the present application. The specific implementation steps of the method can be as follows:
and 201, receiving a shutdown control command.
The inverter compressor in this embodiment may be an inverter compressor driven by an integrated inverter hardware controller, and generally, the inverter compressor is driven by 6 IGBT modules. The frequency conversion compressor can be arranged inside the refrigerator, the refrigerator can be provided with a control device such as a processor, the processor is electrically connected with the frequency conversion compressor, and the processor can send a control signal carried by a stop control instruction to the frequency conversion compressor after receiving the stop control instruction sent by a user, so that the frequency conversion compressor can receive the stop control instruction.
The refrigerator can be provided with a physical key or a virtual key, a user can send a shutdown control signal to the processor through touching the physical key or the virtual key, or the refrigerator can be further provided with a sound collection device such as a microphone, the user sends the shutdown control signal to the processor in a voice mode, or the refrigerator can be further provided with a wireless communication module, the wireless communication module can be in wireless communication connection with external equipment, and the user can send the shutdown control signal to the processor through the external equipment such as a smart phone.
And 202, acquiring the current rotating speed and the current working power of the inverter compressor according to the stop control instruction.
Referring to fig. 3, fig. 3 is a schematic view illustrating a shutdown control method of an inverter compressor according to an embodiment of the present application. And after receiving the stop control instruction, acquiring the current rotating speed and the current working power of the variable frequency compressor according to the stop control instruction. The refrigerator can be further provided with a sensor assembly, the sensor assembly can be electrically connected with the variable frequency compressor, or the sensor assembly is arranged inside the variable frequency compressor, and the current rotating speed and the current working power of the variable frequency compressor can be acquired through the sensor assembly.
And 203, calculating the stop rotating speed of the variable frequency compressor according to the current working power.
After the current working power of the inverter compressor is obtained, the load grade of the refrigerator can be obtained through calculation according to the current working power of the inverter compressor, and the stop rotating speed of the inverter compressor can be obtained through calculation according to the load grade of the refrigerator.
The load level of the refrigerator can indicate the number of articles stored in the refrigerating chamber and the freezing chamber of the refrigerator. The higher the load grade of the refrigerator is, the more the load of the refrigerator is; the lower the load level of the refrigerator, the less the load of the refrigerator. For example, the load level of the refrigerator may be represented by G, and when G is equal to 5, it means that the refrigerator includes 6 load levels of 0, 1, 2, 3, 4, and 5.
Specifically, the manner of calculating the load level of the refrigerator may be: acquiring the lowest power of the variable frequency compressor and the power grade of the variable frequency compressor; calculating the difference value between the current working power and the lowest power to obtain a difference value result; and calculating the ratio of the difference result to the power grade to obtain the load grade of the refrigerator.
In some embodiments, the formula for calculating the load level of the refrigerator may be: and G is [ (P-Pmin)/Pdelta ], wherein G is the load grade of the refrigerator, P is the current working power of the inverter compressor, Pmin is the lowest power of the inverter compressor obtained by actual test, and Pdelta is the power grade of the corresponding inverter compressor under the load grade. The lowest power of the variable frequency compressor can be the compressor power when the refrigerator is in the idle load stable operation state, the rotating speed of the variable frequency compressor is 1200rpm at the ring temperature of 5 ℃, the working gear of the refrigerator is the weakest gear temperature; the maximum power of the inverter compressor can be the compressor power when the inverter compressor is at the ring temperature of 43 ℃, the rotating speed of the inverter compressor is 4500rpm, the working gear of the refrigerator is the highest gear temperature, and the refrigerator is in full-load stable operation.
After the load grade of the refrigerator is obtained through the calculation of the formula, the stop rotating speed of the variable frequency compressor can be obtained through calculation according to the load grade. Specifically, the speed increment corresponding to the load grade of the refrigerator and the lowest rotating speed of the variable frequency compressor can be obtained; calculating the product of the load grade and the lowest rotating speed to obtain a product result; and obtaining the stop rotating speed of the variable frequency compressor according to the sum of the product result and the lowest rotating speed.
In some embodiments, the formula for calculating the shutdown speed of the inverter compressor may be: g × Vdelta + Smin, where S is the stop rotation speed of the inverter compressor, Vdelta is the corresponding speed increment at the load level, and the speed increment may be set to 600; smin is the lowest rotating speed of the inverter compressor, and can be 1200rpm, and the stop rotating speed of the inverter compressor is greater than or equal to the lowest rotating speed of the inverter compressor. It should be noted that, in the process of adjusting the stop rotation speed of the inverter compressor, the stop rotation speed cannot be adjusted to be lower than the lowest rotation speed of the inverter compressor, and if the stop rotation speed is lower than the lowest rotation speed, obvious fluctuation of the rotor torque occurs to generate large noise, and the inverter compressor is damaged due to long-term operation.
And 204, adjusting the current rotating speed to the stop rotating speed according to the preset adjusting speed.
After the stop rotating speed of the variable frequency compressor is obtained through calculation, the current rotating speed of the variable frequency compressor can be adjusted to the stop rotating speed according to the preset adjusting speed. The preset adjustment speed may include acceleration and deceleration, for example, the acceleration may be 1000rpm/s or the deceleration may be 1000 rpm/s. It should be noted that the preset adjustment speed may be set according to different inverter compressors, and is not limited herein.
Specifically, if the current rotating speed of the variable frequency compressor is greater than the stopping rotating speed, the variable frequency compressor is controlled to decelerate to the stopping rotating speed according to the deceleration of the preset adjusting speed; and if the current rotating speed of the variable frequency compressor is less than the stop rotating speed, controlling the variable frequency compressor to accelerate to the stop rotating speed according to the acceleration of the preset adjusting speed.
In addition, due to the existence of the noise resonance area in the refrigerator, if the stop rotating speed of the inverter compressor is adjusted to the resonance rotating speed, large noise is generated. Therefore, the stop rotation speed and the resonance rotation speed need to be different.
Specifically, the resonance rotating speed of the variable frequency compressor can be obtained, and whether the shutdown rotating speed is the same as the resonance rotating speed or not is judged; if the rotating speeds are the same, adjusting the stopping rotating speed to a target stopping rotating speed according to a preset adjusting rotating speed; and if the supports are different, taking the stop rotating speed as the target stop rotating speed.
The preset adjustment rotation speed may be 10rpm, and if the stop rotation speed is 1200rpm, the target stop rotation speed may be set to 1200+10 — 1210rpm or 1200-10 — 1190rpm, that is, the preset adjustment speed may be an interval of speed adjustment, and the specific value may be specifically set according to an actual situation, which is not specifically limited herein.
And 205, controlling the variable frequency compressor to work for a preset time at the stop rotating speed.
After the current rotating speed of the inverter compressor is adjusted to the stop rotating speed, the inverter compressor needs to be controlled to work at the stop rotating speed for a preset time. The preset time period may be 1 second, which may be specifically defined according to actual situations, and is not described herein.
It should be noted that, since the refrigerator itself has a noise resonance region, that is, when the rotation speed of the inverter compressor reaches the resonance rotation speed of the noise resonance region, noise is generated. Therefore, in order to reduce the noise generated by the inverter compressor during the shutdown process, less time needs to be consumed as much as possible in the process of controlling the inverter compressor to adjust the current rotating speed to the shutdown rotating speed through the acceleration or deceleration of the preset adjusting rotating speed, so that the noise interference time brought by the inverter compressor during the acceleration or deceleration process is reduced. For example, the maximum rotation speed of the inverter compressor is 4500rpm, the minimum rotation speed is 1200rpm, the stop rotation speed is 1200rpm, the current rotation speed is 4500rpm, the preset adjustment speed is deceleration, 1000rpm/s, and the process of adjusting the inverter compressor from the current rotation speed to the stop rotation speed only needs 3 seconds, so that the noise resonance region is avoided rapidly and the noise interference is reduced.
However, since the process of adjusting the inverter compressor from the current rotating speed to the stop rotating speed is fast, the rotor in the inverter compressor is in a high-load working state due to a large impact relation generated in the process of rapidly adjusting the rotating speed. Therefore, it is required to temporarily moderate the operating frequency of the refrigerator to reduce the high load operating state of the refrigerator, thereby preventing the damage of the refrigerator, i.e., controlling the inverter compressor to be maintained at the stop rotational speed for a preset time period.
And 206, adjusting the current value corresponding to the rotor torque under the condition that the variable frequency compressor works at the stop rotating speed.
After the variable frequency compressor works for a preset time length under the condition that the variable frequency compressor is maintained at the stop rotating speed, the torque of the rotor of the variable frequency compressor is directly controlled by the q-axis current value of the variable frequency compressor, and if the variable frequency compressor is directly controlled to close the output at the moment, the current value corresponding to the torque of the rotor in the current working state of the variable frequency compressor can be directly reduced to zero, so that the phenomenon of cylinder collision caused by the large inertia of the rotor is avoided.
Therefore, the current value corresponding to the rotor torque needs to be adjusted under the stop rotation speed operation of the inverter compressor. Specifically, the variable frequency compressor obtains a current value corresponding to the rotor torque in the variable frequency compressor under the stop rotating speed operation, and adjusts the current value to a target current value according to a preset current deceleration so as to adjust the rotor torque to zero. Therefore, the q-axis current is reduced before the frequency conversion compressor is stopped, the torque for driving the rotor of the frequency conversion compressor is reduced from large to zero, and the cylinder collision is avoided. The preset current deceleration may be specifically set according to actual conditions, and is not particularly limited herein.
And 207, controlling the output of the inverter compressor to be closed.
And under the condition that the variable frequency compressor works at the stop rotating speed, after the current value corresponding to the rotor torque is adjusted to the target current value, the variable frequency compressor can be controlled to be closed to output, so that the stop control of the variable frequency compressor is realized. Specifically, the output of the inverter compressor may be controlled to be off by an FOC controller within the inverter compressor.
As can be seen from the above, in this embodiment, by receiving the shutdown control instruction, the current rotational speed and the current working power of the inverter compressor are obtained according to the shutdown control instruction, the shutdown rotational speed of the inverter compressor is obtained by calculation according to the current working power, the current rotational speed is adjusted to the shutdown rotational speed according to the preset adjustment speed, the inverter compressor is controlled to operate at the shutdown rotational speed for the preset time, and the inverter compressor is controlled to operate at the shutdown rotational speed, adjust the current value corresponding to the rotor torque, and control the inverter compressor to stop outputting. This embodiment is through the fixed rotational speed of shutting down with frequency conversion compressor among the prior art update to changeable rotational speed of shutting down to make frequency conversion compressor's the rotational speed of shutting down can be applicable to more application scenes, thereby reduced frequency conversion compressor's shut down noise, promoted user experience.
In addition, after the rotating speed of the variable frequency compressor reaches the stop rotating speed, the influence on the refrigerator in the stop process of the variable frequency compressor is avoided by maintaining the stop rotating speed and the working maintaining time strategy; and directly closing and updating the output to the current value corresponding to the torque of the rotor of the variable frequency compressor after the variable frequency compressor reaches the stop rotating speed in the previous embodiment, and then closing the output scheme, so that the noise generated by the larger inertia of the rotor of the variable frequency compressor is reduced, the stop process of the variable frequency compressor is more stable, and the noise of the variable frequency compressor in the stop process can be greatly reduced.
In order to better implement the shutdown control method of the inverter compressor in the embodiment of the application, the embodiment of the application also provides a shutdown control device of the inverter compressor. Referring to fig. 4, fig. 4 is a schematic structural diagram of a shutdown control device of an inverter compressor according to an embodiment of the present disclosure. The shutdown control apparatus 300 of the inverter compressor may include a receiving module 301, an obtaining module 302, a calculating module 303, an adjusting module 304, and a shutting down module 305.
The receiving module 301 is configured to receive a shutdown control instruction;
an obtaining module 302, configured to obtain a current rotation speed and a current working power of the inverter compressor according to the shutdown control instruction;
the calculating module 303 is configured to calculate a shutdown rotation speed of the inverter compressor according to the current working power;
the adjusting module 304 is configured to adjust the current rotation speed to a shutdown rotation speed according to a preset adjusting speed;
and a closing module 305 for controlling the output of the inverter compressor to be closed.
In some embodiments, the calculation module 303 may be further operable to:
calculating the load grade of the refrigerator according to the current working power;
and calculating to obtain the stop rotating speed of the variable frequency compressor according to the load grade.
In some embodiments, please refer to fig. 5, fig. 5 is a second structural schematic diagram of a shutdown control device of an inverter compressor according to an embodiment of the present application. The calculation module 303 may include a first calculation submodule 3031 and a second calculation submodule 3032, where the first calculation submodule 3031 may be configured to:
acquiring the lowest power of the variable frequency compressor and the power grade of the variable frequency compressor;
calculating the difference value between the current working power and the lowest power to obtain a difference value result;
and calculating the ratio of the difference result to the power grade to obtain the load grade of the refrigerator.
The second calculation submodule 3032 may be configured to:
acquiring a speed increment corresponding to the load grade and the lowest rotating speed of the variable frequency compressor;
calculating the product of the load grade and the lowest rate to obtain a product result;
and calculating the sum of the product result and the lowest rotating speed to obtain the stop rotating speed of the variable frequency compressor.
In some embodiments, the shutdown control apparatus 300 for an inverter compressor may also maintain a module 306, the module 306 may be configured to:
and controlling the variable frequency compressor to work for a preset time length at the stop rotating speed.
In some embodiments, the shutdown control apparatus 300 of the inverter compressor may further include a current adjustment module 307, and the current adjustment module 307 may be configured to:
the method comprises the steps that a current value corresponding to rotor torque in the variable frequency compressor is obtained when the variable frequency compressor works at a stop rotating speed;
and adjusting the current value to a target current value according to a preset current deceleration so as to adjust the rotor torque to zero.
In some embodiments, the shutdown control apparatus 300 for an inverter compressor may further include a speed adjustment module 308, which may be configured to:
acquiring the resonance rotating speed of the variable frequency compressor;
judging whether the shutdown rotating speed is the same as the resonance rotating speed or not;
if the rotating speeds are the same, adjusting the stopping rotating speed to a target stopping rotating speed according to a preset adjusting rotating speed;
and if the target stop rotating speed is different from the target stop rotating speed, taking the stop rotating speed as the target stop rotating speed.
All the above technical solutions may be combined arbitrarily to form an optional embodiment of the present application, and are not described in detail herein.
From the above, the embodiments of the present application provide.
Correspondingly, an embodiment of the present application further provides a refrigerator, as shown in fig. 6, fig. 6 is a structural block diagram of the refrigerator provided in the embodiment of the present application. The refrigerator 400 may include a processor 401 having one or more processing cores, a memory 402 having one or more computer-readable storage media, a computer program stored on the memory 402 and operable on the processor 401, and an inverter compressor 403. The processor 401 is electrically connected to the memory 402 and the inverter compressor 403 respectively. Those skilled in the art will appreciate that the refrigerator construction illustrated in the figures does not constitute a limitation of the refrigerator and may include more or fewer components than illustrated, or some components may be combined, or a different arrangement of components.
The processor 401 is a control center of the refrigerator 400, connects various parts of the entire refrigerator 400 using various interfaces and lines, performs various functions of the refrigerator 400 and processes data by operating or loading software programs and/or modules stored in the memory 402 and calling data stored in the memory 402, thereby integrally monitoring the refrigerator 400.
In the embodiment of the present application, the processor 401 in the refrigerator 400 loads instructions corresponding to processes of one or more application programs into the memory 402 according to the following steps, and the processor 401 runs the application programs stored in the memory 402, thereby implementing various functions:
receiving a shutdown control instruction;
acquiring the current rotating speed and the current working power of the variable frequency compressor according to the shutdown control instruction;
calculating to obtain the stop rotating speed of the variable frequency compressor according to the current working power;
adjusting the current rotating speed to a shutdown rotating speed according to a preset adjusting speed;
and controlling the frequency conversion compressor to close the output.
The above operations can be implemented in the foregoing embodiments, and are not described in detail herein.
It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions or by associated hardware controlled by the instructions, which may be stored in a computer readable storage medium and loaded and executed by a processor.
To this end, embodiments of the present application provide a computer-readable storage medium, in which a plurality of computer programs are stored, and the computer programs can be loaded by a processor to execute the steps in any one of the shutdown control methods of the inverter compressor provided by the embodiments of the present application.
Wherein the storage medium may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and various other media capable of storing program codes.
Since the computer program stored in the storage medium can execute the steps in any of the shutdown control methods for an inverter compressor provided in the embodiments of the present application, beneficial effects that can be achieved by any of the shutdown control methods for an inverter compressor provided in the embodiments of the present application can be achieved, for details, see the foregoing embodiments, and are not described herein again.
The shutdown control method, the shutdown control device, the storage medium and the refrigerator of the inverter compressor provided by the embodiment of the application are described in detail, a specific example is applied in the description to explain the principle and the implementation of the application, and the description of the embodiment is only used for helping to understand the method and the core idea of the application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. The shutdown control method of the inverter compressor is characterized by being applied to a refrigerator and comprising the following steps:
receiving a shutdown control instruction;
acquiring the current rotating speed and the current working power of the variable frequency compressor according to the stop control instruction;
calculating to obtain the stop rotating speed of the variable frequency compressor according to the current working power;
adjusting the current rotating speed to the stopping rotating speed according to a preset adjusting speed;
and controlling the frequency conversion compressor to close the output.
2. The shutdown control method of the inverter compressor according to claim 1, wherein the calculating the shutdown rotation speed of the inverter compressor according to the current working power comprises:
calculating to obtain the load grade of the refrigerator according to the current working power;
and calculating to obtain the stop rotating speed of the variable frequency compressor according to the load grade.
3. The shutdown control method of the inverter compressor according to claim 2, wherein the calculating the load level of the refrigerator according to the current working power comprises:
acquiring the lowest power of the inverter compressor and the power grade of the inverter compressor;
calculating the difference value between the current working power and the lowest power to obtain a difference value result;
and calculating the ratio of the difference result to the power grade to obtain the load grade of the refrigerator.
4. The shutdown control method of the inverter compressor according to claim 2, wherein the calculating the shutdown rotation speed of the inverter compressor according to the load class comprises:
acquiring a speed increment corresponding to the load grade and the lowest rotating speed of the variable frequency compressor;
calculating the product of the load grade and the lowest speed to obtain a product result;
and calculating the sum of the product result and the lowest rotating speed to obtain the stop rotating speed of the variable frequency compressor.
5. The shutdown control method of the inverter compressor according to claim 1, wherein after the current rotation speed is adjusted to the shutdown rotation speed at a preset adjustment speed, the method further comprises:
and controlling the variable frequency compressor to work for a preset time length at the stop rotating speed.
6. The shutdown control method of the inverter compressor according to claim 5, wherein after the controlling the inverter compressor to maintain the shutdown rotation speed for a preset time, the method further comprises:
the variable frequency compressor obtains a current value corresponding to the rotor torque in the variable frequency compressor under the stop rotating speed;
and adjusting the current value to a target current value according to a preset current deceleration so as to adjust the rotor torque to zero.
7. Shutdown control method of an inverter compressor according to any of claims 1 to 6, characterized in that the method further comprises:
acquiring the resonance rotating speed of the variable frequency compressor;
judging whether the shutdown rotating speed is the same as the resonance rotating speed or not;
if the rotating speeds are the same, adjusting the stopping rotating speed to a target stopping rotating speed according to a preset adjusting rotating speed;
and if the target stop rotating speed is different from the target stop rotating speed, taking the stop rotating speed as the target stop rotating speed.
8. A stop control device of an inverter compressor is characterized by being applied to a refrigerator, and comprising:
the receiving module is used for receiving a shutdown control instruction;
the acquisition module is used for acquiring the current rotating speed and the current working power of the variable frequency compressor according to the stop control instruction;
the calculating module is used for calculating the stop rotating speed of the variable frequency compressor according to the current working power;
the adjusting module is used for adjusting the current rotating speed to the shutdown rotating speed according to a preset adjusting speed;
and the closing module is used for controlling the closing output of the variable-frequency compressor.
9. A storage medium readable by a computer, having a computer program stored thereon, wherein the computer program, when executed on the computer, causes the computer to execute the shutdown control method of the inverter compressor according to any one of claims 1 to 7.
10. A refrigerator, characterized by comprising:
the inverter compressor is the inverter compressor as claimed in any one of claims 1 to 7;
a memory storing a computer program;
a processor for executing a method for controlling a shutdown of an inverter compressor according to any one of claims 1 to 7 by calling the computer program stored in the memory.
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| CN202210430343.6A CN114739105B (en) | 2022-04-22 | 2022-04-22 | Shutdown control method and device for variable frequency compressor, storage medium and refrigerator |
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| CN202210430343.6A CN114739105B (en) | 2022-04-22 | 2022-04-22 | Shutdown control method and device for variable frequency compressor, storage medium and refrigerator |
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| CN114739105B (en) | 2024-02-06 |
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