CN110953777B - Refrigeration equipment and shutdown control method of compressor of refrigeration equipment - Google Patents
Refrigeration equipment and shutdown control method of compressor of refrigeration equipment Download PDFInfo
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- CN110953777B CN110953777B CN201911159842.0A CN201911159842A CN110953777B CN 110953777 B CN110953777 B CN 110953777B CN 201911159842 A CN201911159842 A CN 201911159842A CN 110953777 B CN110953777 B CN 110953777B
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/12—Sound
Abstract
The application provides a refrigeration plant and a shutdown control method of a compressor of the refrigeration plant, relates to the field of compressor control, improves the shutdown stability of the compressor, and solves the problem that the compressor shakes to generate noise when the compressor is shut down in a high rotating speed state. This refrigeration plant includes: the temperature detection device comprises a compressor, a temperature detection device and a control device; the temperature detection device is used for detecting the temperature of a temperature control area of the refrigeration equipment; the control device is configured to: when a shutdown instruction is received or the detection temperature of the temperature detection device reaches a set temperature, if the rotating speed of the compressor is determined to be greater than a first preset rotating speed, the compressor is controlled to be decelerated to the first preset rotating speed at a first preset acceleration; then controlling the compressor to reduce the speed to the preset stop rotating speed at a second preset acceleration; the second preset acceleration is smaller than the first preset acceleration; and controlling the compressor to stop after maintaining the target time at the preset stop rotating speed.
Description
Technical Field
The application relates to the field of compressor control, in particular to refrigeration equipment and a shutdown control method of a compressor of the refrigeration equipment.
Background
With the increasing improvement of living standard of people, people have higher and higher requirements on living quality, and especially in the aspect of electric appliance use, the characteristic of low noise is more and more emphasized. And refrigerator, air conditioner etc. are through the cryogenic refrigeration plant of compressor, and its inside compressor can directly be shut down when its inside temperature reaches the settlement temperature, because the core of compressor can have very big rotation inertia when high rotational speed state is shut down, and the core is in the unbalanced state promptly, can make under this kind of circumstances to appear asynchronous motion between the casing of core and compressor, causes the compressor shake to the noise produces. In addition, in order to ensure the dynamic balance of the compressor in the operation process, a balance block is arranged on a crankshaft of the compressor in practice so as to ensure the dynamic balance of a machine core of the compressor in the operation process, but when the machine core stops from a high-speed state, the balance block is eccentric (centrifugal), instability of the machine core can be caused, and the phenomenon that the compressor directly stops from a high-speed state, large vibration is generated, even the phenomenon that the machine core collides with a shell to cause cylinder collision is generated, and noise is generated. In addition, referring to fig. 1, in practice, the internal pipeline 100 of the compressor is an artificial coil, the consistency of the pipeline 100 is poor, and after the internal pipeline 100 is installed, pipeline stress can cause the movement to be offset, so that the distance between the movement and the shell of the compressor is reduced, and the vibration and even the collision between the movement and the shell are generated at the moment of the shutdown of the compressor to generate cylinder collision, thereby generating noise.
Disclosure of Invention
The embodiment of the application provides a refrigeration plant and a shutdown control method of a compressor of the refrigeration plant, improves the shutdown stability of the compressor, and reduces the noise generated when the compressor is shut down.
In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:
in a first aspect, there is provided a refrigeration apparatus comprising: the temperature detection device comprises a compressor, a temperature detection device and a control device; the temperature detection device is used for detecting the temperature of a temperature control area of the refrigeration equipment; the control device is configured to: when a shutdown instruction is received or the detection temperature of the temperature detection device reaches a set temperature, if the rotating speed of the compressor is determined to be greater than a first preset rotating speed, the compressor is controlled to be decelerated to the first preset rotating speed at a first preset acceleration; after the compressor is decelerated to a first preset rotating speed, the compressor is controlled to be decelerated to a preset stop rotating speed at a second preset acceleration; the second preset acceleration is smaller than the first preset acceleration; and controlling the compressor to stop after maintaining the target time length at the preset stop rotating speed.
The application provides a refrigeration plant, when controlling means received shut down instruction or temperature-detecting device's detection temperature reached the settlement temperature, changed the scheme that current compressor directly shut down, by controlling means through two-stage deceleration and first preset acceleration be greater than the second preset acceleration control compressor deceleration to predetermineeing the rotational speed of shutting down, the control compressor is shut down again after keeping the target duration with predetermineeing the rotational speed of shutting down. The technical scheme that this application provided to the falling speed mode with high acceleration makes the compressor rotational speed avoid the resonance area rapidly, stops to predetermine behind the rotational speed of shutting down with the steady falling of rotational speed with the compressor of low acceleration again, thereby has solved the core of compressor and owing to have rotational inertia when the direct shut down of high rotational speed state, thereby the problem of noise is produced to the motion that appears asynchronization between the casing of core and compressor leads to the compressor shake. In addition, the rotating speed of the compressor is guaranteed to be stabilized at the preset stop rotating speed through two-stage speed reduction and the target duration is maintained at the preset stop rotating speed, so that the problem of noise caused by large shaking and even cylinder collision when the compressor is directly stopped from a high rotating speed is solved.
In a second aspect, there is provided a stop control method of a compressor of a refrigeration apparatus, including: when a shutdown instruction is received or the temperature of a temperature control area of the refrigeration equipment reaches a set temperature, if the rotating speed of the compressor is determined to be greater than a first preset rotating speed, the compressor is controlled to decelerate to the first preset rotating speed at a first preset acceleration; after the compressor is decelerated to a first preset rotating speed, the compressor is controlled to be decelerated to a preset stop rotating speed at a second preset acceleration; the second preset acceleration is smaller than the first preset acceleration; and controlling the compressor to stop after maintaining the target time length at the preset stop rotating speed.
In a third aspect, there is provided a stop control device for a compressor of a refrigeration apparatus, comprising: the device comprises an acquisition module, a judgment module and a control module; the control module is used for controlling the compressor to decelerate to a first preset rotating speed at a first preset acceleration if the judging module determines that the rotating speed of the compressor is greater than the first preset rotating speed when the obtaining module receives a shutdown instruction or the judging module determines that the temperature of a temperature control area of the refrigeration equipment reaches a set temperature; the control module is also used for controlling the compressor to decelerate to the preset stop rotating speed at a second preset acceleration after the compressor decelerates to the first preset rotating speed; the second preset acceleration is smaller than the first preset acceleration; the control module is also used for controlling the compressor to stop after the compressor maintains the target duration at the preset stop rotating speed.
In a fourth aspect, the present application provides another shutdown control apparatus for a compressor of a refrigeration appliance, including a memory, a processor, a bus, and a communication interface; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus; when the stop control device of the compressor of the refrigeration equipment is operated, the processor executes the computer execution instructions stored by the memory so as to cause the stop control device of the compressor of the refrigeration equipment to execute the stop control method of the compressor of the refrigeration equipment as provided by the second aspect.
In a fifth aspect, the present application provides a computer storage medium storing computer-executable instructions, which when executed by a computer, implement the shutdown control method for the compressor of the refrigeration equipment as provided in the second aspect.
The refrigeration equipment and the shutdown control method of the compressor of the refrigeration equipment provided by the embodiment of the application comprise the following steps: the temperature detection device comprises a compressor, a temperature detection device and a control device; the temperature detection device is used for detecting the temperature of a temperature control area of the refrigeration equipment; the control device is configured to: when a shutdown instruction is received or the detection temperature of the temperature detection device reaches a set temperature, if the rotating speed of the compressor is determined to be greater than a first preset rotating speed, the compressor is controlled to be decelerated to the first preset rotating speed at a first preset acceleration; after the compressor is decelerated to a first preset rotating speed, the compressor is controlled to be decelerated to a preset stop rotating speed at a second preset acceleration; wherein the second preset acceleration is smaller than the first preset acceleration; and finally, controlling the compressor to stop after maintaining the target time length at the preset stop rotating speed. According to the technical scheme, the rotating speed of the compressor is enabled to rapidly avoid a resonance band in a high-acceleration speed reduction mode, and then the rotating speed of the compressor is stably reduced to the preset stop rotating speed and then stopped in a low-acceleration speed reduction mode, so that the whole stop process of the compressor is more stable, the problem that the compressor shakes to generate noise due to the fact that the movement of the compressor is asynchronous with the shell of the compressor and the compressor shakes due to the fact that the movement of the compressor is in a high-rotation-speed state when the movement of the compressor is directly stopped is solved, and the noise generated by the stop of the compressor is reduced; in addition, the rotation speed of the compressor is guaranteed to be stabilized at the preset stop rotation speed through two-stage speed reduction and after the preset stop rotation speed is maintained for the target duration, the stability of the compressor during stop is improved, and the compressor is stably stopped.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a cross-sectional view of an internal structure of a compressor according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a refrigeration apparatus provided in an embodiment of the present application;
fig. 3 is a schematic flow chart of a method for controlling shutdown of a compressor of a refrigeration apparatus according to an embodiment of the present disclosure;
fig. 4 is a schematic flow chart of a shutdown control method for a compressor of a refrigeration apparatus according to an embodiment of the present application;
fig. 5 is a schematic flow chart of a method for controlling shutdown of a compressor of a refrigeration apparatus according to an embodiment of the present application;
FIG. 6 is a graph illustrating start-stop vibration of a compressor of a refrigeration apparatus according to an embodiment of the present disclosure;
FIG. 7 is a line graph illustrating shutdown vibration values of a compressor of a refrigeration apparatus according to an embodiment of the present disclosure;
FIG. 8 is a cross-sectional view of a compressor of a refrigeration unit according to an embodiment of the present disclosure;
fig. 9 is a line diagram of shutdown vibration values of a compressor of another refrigeration equipment provided by an embodiment of the present application;
FIG. 10 is a graph illustrating a shutdown condition of a compressor of a refrigeration apparatus according to an embodiment of the present disclosure;
FIG. 11 is a graph illustrating a shutdown of a compressor of another refrigeration apparatus according to an embodiment of the present application;
fig. 12 is a line diagram illustrating shutdown vibration values of a compressor of a further refrigeration apparatus according to an embodiment of the present application;
fig. 13 is a schematic structural diagram of a stop control device of a compressor of a refrigeration apparatus according to an embodiment of the present application;
fig. 14 is a schematic structural diagram of a shutdown control device for a compressor of another refrigeration apparatus according to an embodiment of the present application.
Detailed Description
A refrigeration apparatus and a method for controlling shutdown of a compressor of the refrigeration apparatus according to embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.
The terms "first" and "second" and the like in the description and drawings of the present application are used for distinguishing different objects or for distinguishing different processes for the same object, and are not used for describing a specific order of the objects.
Furthermore, the terms "including" and "having," and any variations thereof, as referred to in the description of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
In the description of the present application, the meaning of "a plurality" means two or more unless otherwise specified.
In order to solve the problem that when the movement of the existing compressor is stopped at a high rotation speed, due to the existence of rotational inertia, asynchronous movement between the movement and the shell of the compressor is caused, so that the compressor shakes to generate noise and other factors cause the compressor to shake to generate noise, referring to fig. 2, an embodiment of the present application provides a refrigeration apparatus, where the refrigeration apparatus 200 includes: compressor 201, temperature detection device 202 and control device 203.
And the temperature detection device 202 is used for detecting the temperature of the temperature control area of the refrigeration equipment 200.
The control device 203 is configured to: when a shutdown instruction is received or the detected temperature of the temperature detection device 202 reaches a set temperature, if the rotating speed of the compressor 201 is determined to be greater than a first preset rotating speed, controlling the compressor 201 to decelerate to the first preset rotating speed at a first preset acceleration; after the compressor 201 is decelerated to the first preset rotating speed, controlling the compressor 201 to be decelerated to the preset stop rotating speed at a second preset acceleration; the second preset acceleration is smaller than the first preset acceleration; the compressor 201 is stopped after being controlled to maintain the target time period at the preset stop rotational speed.
The set temperature may be a temperature determined in advance by a human (for example, a temperature set by a remote controller), and when the temperature of the temperature controlled area of the refrigeration apparatus 200 is equal to the set temperature, the compressor 201 is stopped under the control of the control device 203.
The existing scheme that the compressor 201 is directly stopped at the set temperature can cause unstable movement of the compressor 201 when the movement of the compressor 201 is stopped at a high rotating speed due to the existence of rotational inertia, and simultaneously, the unstable movement caused by the eccentricity of a balance block when the movement is stopped at a high speed and the offset of the movement caused by pipeline stress can cause the compressor 201 to shake and even collide with a cylinder to generate noise at the moment that the compressor 201 is stopped.
The first preset acceleration and the first preset rotating speed are parameters determined through multiple shutdown tests in advance.
Through the first-stage deceleration with the process of compressor 201 rotational speed fast drop to first predetermined rotational speed, the resonance band of compressor 201 and box has been avoided, so, after compressor 201 decelerates to first predetermined rotational speed, can choose for use to compare the less second predetermined acceleration of first predetermined acceleration and slowly drop to predetermineeing the shut down rotational speed with compressor 201 rotational speed, slowly drop and to make compressor 201 rotational speed more be close to the compressor 201 actual rotational speed that rotational speed signal corresponds, and make the deceleration process more stable, the unbalanced tendency of the core of compressor 201 has just also been lower.
In addition, the rotating speed of the compressor 201 is reduced to the preset stop rotating speed to stop, and the rotating momentum of the core of the compressor 201 is reduced step by step through two-stage gradual speed reduction, so that the problem of noise caused by instability of the core of the compressor 201 during direct stop can be further improved, and the stable stop of the compressor 201 is realized.
The preset shutdown rotation speed is a predetermined shutdown rotation speed, and specifically, in this embodiment of the application, the minimum rotation speed corresponding to the model of the compressor 201 may be selected as the preset shutdown rotation speed. Certainly, in practical application, the preset stop rotation speed may also be determined in other manners, for example, a stop test of the compressor 201 may be performed for multiple times to obtain a start-stop vibration curve and a vibration slice diagram of the compressor 201, stop vibration values of the compressor 201 at different stop rotation speeds are compared, and finally the stop rotation speed with the smallest average value among the stop vibration values obtained through multiple tests is determined as the preset stop rotation speed.
Because inertia exists during rotation of the rotor in the compressor 201, if only an instruction is sent to enable the rotation speed of the compressor 201 to reach the preset stop rotation speed in a mode of controlling the power frequency and the like, the rotation speed of the rotor is slightly larger than the required preset stop rotation speed due to the inertia and is unstable, in order to ensure that the stop rotation speed of the compressor 201 is closer to the preset stop rotation speed, after the compressor 201 is controlled to be decelerated to the preset stop rotation speed at the second preset acceleration, the compressor 201 is controlled to be stopped after the compressor is maintained at the preset stop rotation speed for the target duration.
The target time length is determined by multiple shutdown tests in advance. For example, in the embodiment of the present application, the target time period may be set to 3 seconds.
In practical application, the rotation speed of the compressor 201 is divided into different levels according to the ambient temperature of the refrigeration equipment 200, and the rotation speed of the compressor 201 after stabilization corresponding to each level is different, so the rotation speed of the compressor 201 before receiving a stop instruction is divided into three conditions: the rotating speed is greater than the first preset rotating speed, not greater than the first preset rotating speed but greater than the preset shutdown rotating speed and not greater than the preset shutdown rotating speed.
Therefore, optionally, the control device 203 is specifically configured to: when a shutdown instruction is received or the detected temperature of the temperature detection device 202 reaches a set temperature, if the rotating speed of the compressor 201 is determined to be not greater than the first preset rotating speed and greater than the preset shutdown rotating speed, controlling the compressor 201 to decelerate to the preset shutdown rotating speed at a second preset acceleration; the compressor 201 is stopped after being controlled to maintain the target time period at the preset stop rotational speed.
Optionally, the control device 203 is specifically configured to: when a stop instruction is received or the detected temperature of the temperature detecting device 202 reaches a set temperature, if it is determined that the rotation speed of the compressor 201 is not greater than the preset stop rotation speed, the compressor 201 is controlled to stop.
Because the rotation speed of the compressor 201 affects the operating frequency (fundamental frequency) of the compressor 201 when the core of the compressor 201 rotates, if the operating frequency of the compressor 201 corresponding to the rotation speed and the natural frequency of the box in which the compressor 201 is located are divisible with each other, that is, if the operating frequency of the compressor 201 corresponding to the rotation speed reaches a positive integer multiple of the natural frequency of the box in which the compressor 201 is located, or the natural frequency of the box in which the compressor 201 is located reaches a positive integer multiple of the operating frequency of the compressor 201 corresponding to the rotation speed, a resonance phenomenon occurs, that is, under the resonance frequency, the compressor 201 drives the box to generate vibration with strong amplitude to generate noise, so in order to avoid the resonance band between the compressor 201 and the box, in the process of controlling the compressor 201 to sequentially decelerate to the first preset rotation speed at the first preset acceleration, when determining the first preset rotation speed, rotation speeds corresponding to the operating frequencies of the compressor 201 that are divisible with each other between the natural frequencies of the casing in which the compressor 201 is located should be avoided.
Therefore, alternatively, the operating frequency of the compressor 201 corresponding to the first preset rotation speed and the natural frequency of the tank in which the compressor 201 is located cannot be evenly divided. Illustratively, when the operating frequency of the compressor 201 is 30Hz (frequency unit, the frequency of 30Hz corresponds to the rotation speed of the compressor 201 being 1800R), and the first-order natural frequency of the box where the compressor 201 is located is 60Hz, the compressor 201 and the box will generate a resonance phenomenon, that is, the compressor 201 and the box will generate a resonance phenomenon when the rotation speed of the compressor 201 is 1800R. The compressor 201 may be a compressor 201 of a refrigeration device 200 such as an air conditioner or a refrigerator, and a box body where the compressor 201 is located is a box body of the corresponding refrigeration device 200 such as an air conditioner or a refrigerator.
It should be noted that the natural frequency of the tank where the compressor 201 is located is more than one order, and the natural frequency described above only needs to be considered to the first six orders of the natural frequency of the tank.
It should be noted that, in order to avoid the problem of the generation of resonance phenomenon during the shutdown and the noise generated by the refrigeration equipment 200 in which the compressor 201 is located during the shutdown process due to the resonance phenomenon, the operating frequency of the compressor 201 corresponding to the preset shutdown rotation speed and the natural frequency of the box in which the compressor 201 is located may not be evenly divided.
In addition, since the starting gear rotation speed (oiling rotation speed) is an important node in the process of decelerating and stopping the compressor 201, the process of rapidly decelerating the compressor 201 to the starting gear rotation speed can enable the compressor 201 to rapidly pass through a resonance band, that is, the resonance band is a frequency range in which the compressor 201 and the tank body can generate a resonance phenomenon when the tank body is not excited in the process of decelerating the compressor 201, so optionally, the first preset rotation speed is the starting gear rotation speed of the compressor 201; of course, in practical applications, the first preset rotation speed may also be a rotation speed determined in advance by other people.
The application provides a refrigeration plant, when controlling means received shut down instruction or temperature-detecting device's detection temperature reached the settlement temperature, changed the scheme that current compressor directly shut down, by controlling means through two-stage deceleration and first preset acceleration be greater than the second preset acceleration control compressor deceleration to predetermineeing the rotational speed of shutting down, the control compressor is shut down again after keeping the target duration with predetermineeing the rotational speed of shutting down. The technical scheme that this application provided makes the compressor rotational speed avoid the resonance area rapidly with the deceleration mode of high acceleration earlier, stops to predetermineeing behind the rotational speed of shutting down with the steady decline of rotational speed of low acceleration of compressor again, and the core of having solved the compressor is owing to have rotational inertia when high rotational speed state is directly shut down, thereby the problem of noise is produced to the motion that appears asynchronization between the casing of core and compressor leads to the compressor shake. In addition, the rotating speed of the compressor is guaranteed to be stabilized at the preset stop rotating speed through two-stage speed reduction and the target duration is maintained at the preset stop rotating speed, so that the problem of noise caused by large shaking and even cylinder collision when the compressor is directly stopped from a high rotating speed is solved.
Referring to fig. 3, an embodiment of the present application provides a method for controlling a shutdown of a compressor of a refrigeration apparatus, which may be specifically executed by a control device of the refrigeration apparatus, where the control device may be a main control board of the refrigeration apparatus, and may also be disposed in the main control board of the refrigeration apparatus, and the method may include S101 to S108:
s101, determining that the temperature of a temperature control area of the refrigeration equipment reaches a set temperature.
Alternatively, as shown in fig. 4, the above step S101 may be replaced with S1011.
And S1011, receiving a shutdown command.
S102, judging whether the rotating speed of the compressor is greater than a first preset rotating speed or not.
When the rotation speed of the compressor is determined to be greater than the first preset rotation speed, 103 is executed.
S103, controlling the compressor to decelerate to a first preset rotating speed at a first preset acceleration. Alternatively, as shown in fig. 5, after step S102, if it is determined that the rotation speed of the compressor is greater than the first preset rotation speed, S103 is executed; if the rotation speed of the compressor is not greater than the first preset rotation speed, S104 is executed.
And S104, judging whether the rotating speed of the compressor is greater than a preset stop rotating speed or not.
If the rotating speed of the compressor is not greater than the first preset rotating speed and is greater than the preset stopping rotating speed, S105 is executed; if the compressed rotating speed is not larger than the preset stop rotating speed, S106 is executed.
And S105, controlling the compressor to reduce the speed to the preset stop rotating speed at a second preset acceleration.
After S105 is executed, S108 is executed.
And S106, controlling the compressor to stop.
And S107, after the compressor is decelerated to the first preset rotating speed, controlling the compressor to be decelerated to the preset stop rotating speed at a second preset acceleration.
And S108, stopping the compressor after the compressor is controlled to maintain the target time length at the preset stop rotating speed.
According to the shutdown control method for the compressor of the refrigeration equipment, when a shutdown instruction is received or the temperature of a temperature control area of the refrigeration equipment reaches a set temperature, the compressor is controlled to be decelerated to a preset shutdown rotating speed through two-stage deceleration and the first preset acceleration is larger than the second preset acceleration, and finally the compressor is controlled to be shut down after the compressor is maintained at the preset shutdown rotating speed for a target time length. According to the shutdown control method for the compressor of the refrigeration equipment, the compressor with high rotation speed is decelerated through different acceleration speeds of high speed and low speed, so that the unbalanced tendency of the machine core of the compressor is gradually reduced and the resonance band is quickly avoided, and finally the machine core of the compressor is decelerated to the preset shutdown rotation speed and then is shut down, so that the whole shutdown process of the compressor is more stable, the problem that the compressor shakes due to the fact that asynchronous movement between the machine core and a shell of the compressor causes vibration when the machine core of the compressor is shut down in a high rotation speed state is solved, and noise generated by shutdown of the compressor is reduced; in addition, the rotation speed of the machine core of the compressor at the moment of stopping is small and stable due to two-stage speed reduction, so that the problem that the machine core shakes to generate cylinder collision at the moment of stopping due to the existence of pipeline stress is solved; in addition, the rotation speed of the compressor is guaranteed to be stable at the preset stop rotation speed through two-stage speed reduction and after the preset stop rotation speed is maintained for a long time, the possibility of large jitter generated when the compressor is directly stopped from a high rotation speed is further reduced, the stability of the compressor when the compressor is stopped is improved, and the stable stop of the compressor is realized.
In order to more clearly illustrate the shutdown control method of the compressor of the refrigeration equipment provided by the embodiment of the present application and verify the reliability and authenticity of the smooth shutdown of the compressor by using the shutdown control method of the compressor of the refrigeration equipment provided by the embodiment of the present application, two embodiments will be specifically described below in detail.
It should be noted that the shutdown control method for the compressor of the refrigeration apparatus provided in the embodiment of the present application may be applied to a compressor in which a core is light, a crankshaft balance is poor, a compression spring stiffness is large (seat spring is hard), a gap between the core and a shell of the compressor is sufficient, a pressure of a refrigeration system is not large, or a defect (for example, pipeline stress exists) is designed in the compressor.
The first embodiment is as follows: the target rotating speed of a certain series of compressors is 4100R, the rotating speed of a starting gear of the compressors (oiling rotating speed) is 2400R, and the minimum rotating speed of the series of compressors is 1200R, two shutdown modes are respectively adopted for shutdown test, and the two shutdown modes are respectively as follows: the method comprises the steps that according to a first scheme, after the acceleration is reduced to 2400R at a large speed, the acceleration is reduced to a preset shutdown rotating speed at a small speed, and then the rotation speed is maintained for 3 seconds; and in the second scheme, the rotating speed is directly reduced to the preset shutdown rotating speed and then is maintained for 3 seconds.
Before the shutdown test is performed by adopting the first shutdown mode and the second shutdown mode, the preset shutdown rotating speed and the second preset acceleration can be determined through the shutdown test, and the specific determination mode is as shown in the third scheme:
and thirdly, preliminarily determining the preset stop rotating speed to be the minimum rotating speed 1200R of the compressor, and setting the first preset acceleration to be 180R/S, namely 3R/S2(acceleration unit), the first preset rotating speed is 2400R, and the second preset acceleration is 120R/S, namely 2R/S2Specifically, after the compressor is started, when a shutdown instruction is received or the temperature of a temperature control area of the refrigeration equipment reaches a set temperature, if the current rotating speed of the compressor is greater than a first preset rotating speed 2400R, the compressor is controlled to rotate at 180R/S, namely 3R/S2Is decelerated to a first preset rotational speed 2400R and then decelerated to a second preset acceleration of 120R/S, i.e. 2R/S2And the second preset acceleration is reduced to 1200R, and the engine is stopped after the target time length is maintained for 3 seconds at the rotating speed of 1200R.
Referring to fig. 6, a graph of the start-stop vibration of the compressor of the refrigeration equipment obtained by adopting the shutdown scheme of the third scheme is shown, wherein the abscissa of the graph is time t in seconds(s), the ordinate represents the stop vibration value in m/s2, the larger the stop vibration value, the larger the wobble amplitude at the stop of the compressor, the worse the stability, and the larger the noise, as shown in FIG. 6, when the time is 310S, the compressor starts, the rotating speed of the compressor is reduced to the preset stop rotating speed 1200R to start the stop at the time of approaching 400S, and the time t1 is the lowest point of the vibration value in the deceleration, the time t2 is the stop point of the compressor, it can be obviously seen that the instantaneous vibration value at the moment of stopping the compressor is suddenly increased, which indicates that the vibration amplitude of the machine core of the compressor is increased at the moment of stopping the compressor, the rotation speed at the lowest point of the vibration value at the time t1 is 1600R to 1800R.
For the compressor sample provided in the first embodiment, the following three shutdown schemes are used: when the stop command is received, the acceleration of the speed reduction is 180R/S, namely 3R/S when the rotating speed of the compressor is more than 2400R2When the rotating speed of the compressor is reduced to 2400R, the rotating speeds are respectively 60R/S, 120R/S and 240R/S, namely 1R/S2、2r/s2And 4r/s2The acceleration begins to reduce the speed, and the machine is stopped after the acceleration is reduced to 1200R; the three shut-down schemes were conducted in 10 groups, and the vibration values at the shut-down moment of each experiment are plotted in FIG. 7, in which the ordinate is the vibration value (in m/s)2) The abscissa represents the number of experimental groups.
It should be noted that, in practice, when the measured shutdown vibration value is 0.5 to 0.6, the compressor can be observed to shake obviously, and when the measured shutdown vibration value is more than 0.6, a cylinder collision phenomenon (a collision and an impact between a machine core and a shell of the compressor) can occur, so that, as can be seen from fig. 7, 120R/S, that is, 2R/S, is adopted2In ten groups of experiments of stopping at the acceleration reduced speed of 1200R to the preset stopping rotating speed, the vibration value of the 8 th group is 0.77m/s2That is, a cylinder collision phenomenon occurs once, so that the shutdown is unstable with 1200R as the preset shutdown rotation speed.
Referring to FIG. 8, the third proposal is adopted, namely the acceleration of the deceleration is 180R/S, namely 3R/S when the rotating speed of the compressor is above 2400R2When the rotating speed of the compressor is reduced to 2400R, the rotating speed is reduced to 120R/S, namely 2R/S2The acceleration of the motor is reduced to 1200R, and then the motor is stopped to obtain a vibration slice image; wherein the ordinate is time (in units of s) and the abscissa is frequency (in units of Hz) corresponding to the rotational speed of the compressor.
As can be seen from fig. 8, when the compressor rotation frequency is 25Hz to 30Hz, i.e. the corresponding rotation speed is 1500R to 1800R, the vibration value is minimum, and the rotation speed 1500R to 1800R can be used as the preset stop rotation speed in combination with the rotation speed corresponding to the lowest point of the vibration value at time t1 in fig. 6. In addition, as can be seen from FIG. 7, group 8 data is removed (i.e., 120R/S or 2R/S is used)2The acceleration of the vehicle is reduced, the data corresponding to the collision cylinder appears), and the other data is 120R/S, namely 2R/S2Is less than 60R/S, i.e. 1R/S2And 240R/S, i.e. 4R/S2The acceleration of (1) is decreased by the average shutdown vibration value.
By combining the above analyses, 120R/S, i.e., 2R/S, can be obtained2The final second preset acceleration is determined, and the rotation speeds 1500R to 1800R may be taken as the preset stop rotation speed.
In order to find the optimal preset stop rotating speed of the compressor in the first embodiment, the acceleration of speed reduction of the compressor when the rotating speed of the compressor is above 2400R is 180R/S (3R/S) by adopting 4 different rotating speeds (1500R, 1600R, 1700R and 1800R) as the preset stop rotating speed2When the rotating speed of the compressor is reduced to 2400R, the rotating speed is reduced to 120R/S, namely 2R/S2The shutdown scheme of starting the deceleration of the acceleration is tested, ten groups of shutdown experiments corresponding to each preset shutdown rotating speed are carried out, and a line graph of vibration values at the moment of shutdown measured by each group is shown in FIG. 9, wherein the ordinate is the vibration value (in m/s)2) The abscissa represents the number of experimental groups.
As can be seen from fig. 9, the vibration values at the stopping moment are large when 1500R and 1800R are used as the preset stopping rotational speed, the vibration values at the stopping moment are not greatly different when 1600R and 1700R are used as the preset stopping rotational speed, and the average vibration value at the stopping moment is smaller when 1600R is used as the preset stopping rotational speed, and the cylinder collision phenomenon does not occur in the ten groups of data, as can be seen from calculating the average value of the ten groups of data.
In summary, the compressor sample provided in the first embodiment of the present application can adopt 1600R as the preset stop speed, 120R/S or 2R/S2As a second preset acceleration shutdown scheme.
Applying the obtained conclusion to a first scheme and a second scheme for ten groups of shutdown tests, wherein the first scheme specifically comprises the following steps: when a stop command is received or the temperature of a temperature control area of the refrigeration equipment reaches a set temperature, the rotating speed of the compressor is above 2400R, and the rotating speed is 180R/S, namely 3R/S2Is decelerated to a first preset rotation speed 2400R, and then 120R/S, namely 2R/S2The vehicle is stopped after the second preset acceleration is reduced to the preset stop rotation speed 1600R and the target duration is maintained at the rotation speed 1600R for 3 seconds, as shown in fig. 10, the stop curve graph of the stop scheme adopting the first scheme is shown, wherein the abscissa in fig. 10 is time (in units of s) and the ordinate is a rotation speed value (in units of R, i.e., R/min); the second scheme is as follows: when a stop command is received or the temperature of a temperature control area of the refrigeration equipment reaches a set temperature, when the rotating speed of the compressor is more than 2400R, 180R/S (3R/S) is used2The first preset acceleration is directly reduced to the preset shutdown rotation speed 1600R, and the shutdown is performed after the rotation speed of 1600R is maintained for the target duration of 3 seconds, as shown in fig. 11, which is a shutdown curve chart of the shutdown scheme adopting the second scheme.
Referring to fig. 12, a line graph of shutdown vibration values obtained by performing ten groups of shutdown tests using the two schemes described above is shown, where the ordinate of the line graph represents the shutdown vibration value of the compressor, and the unit is m/s2, and as can be seen from fig. 12, when shutdown is performed using the shutdown methods of the scheme one and the scheme two, the fluctuation of the vibration values is not large, and the shutdown vibration values of the ten groups of data are all below 0.25, but the average shutdown vibration value at the moment of shutdown is smaller using the shutdown method of the scheme one, that is, the scheme one is significantly better than the scheme two, where the scheme one is the shutdown scheme corresponding to the shutdown control method of the compressor provided in the embodiment of the present application.
Through the verification, the shutdown control method of the compressor stops, the shutdown vibration value in the moment of shutdown is very small, namely, the core shakes very little when the compressor is shut down, the cylinder collision phenomenon cannot occur, the stability of the compressor when the compressor is shut down can be ensured, and the compressor is stably shut down.
Example two: the target rotating speed of a certain series of compressors is 4100R, the rotating speed of a starting gear of the compressors (oiling rotating speed) is 2400R, and the minimum rotating speed of the series of compressors is 1200R, 30 sets of shutdown tests are carried out by adopting the shutdown control method of the compressors provided by the application, namely the scheme provided by the first scheme in the first embodiment, and the test results are as follows in table 1:
TABLE 1
| Number of |
1 | 2 | 3 | 4 | 5 | 6 |
| Vibration value (m/s) of stop2) | 0.16 | 0.17 | 0.16 | 0.17 | 0.22 | 0.20 |
| Number of |
7 | 8 | 9 | 10 | 11 | 12 |
| Vibration value (m/s) of stop2) | 0.15 | 0.18 | 0.17 | 0.19 | 0.17 | 0.16 |
| Number of groups | 13 | 14 | 15 | 16 | 17 | 18 |
| Vibration value (m/s) of stop2) | 0.17 | 0.15 | 0.15 | 0.18 | 0.14 | 0.21 |
| Number of groups | 19 | 20 | 21 | 22 | 23 | 24 |
| Vibration value (m/s) of stop2) | 0.17 | 0.15 | 0.16 | 0.15 | 0.18 | 0.18 |
| Number of groups | 25 | 26 | 27 | 28 | 29 | 30 |
| Vibration value (m/s) of stop2) | 0.18 | 0.16 | 0.17 | 0.16 | 0.16 | 0.18 |
The data in the table show that when the shutdown control method of the compressor provided by the embodiment of the application is adopted for shutdown, the fluctuation of the shutdown vibration value is small, and the shutdown vibration values of 30 groups of data are all below 0.22, namely, the core shakes very little when the compressor is shut down, the cylinder collision phenomenon cannot occur, the stability of the compressor during shutdown can be ensured, and the compressor can be stably shut down.
As shown in fig. 13, the present embodiment further provides a schematic diagram of a possible structure of a shutdown control device 01 of a compressor of a refrigeration apparatus, where the shutdown control device 01 of the compressor of the refrigeration apparatus is used to implement the shutdown control method of the compressor of the refrigeration apparatus provided in the foregoing embodiment, and the shutdown control device 01 of the compressor of the refrigeration apparatus provided in the present embodiment is also the control device of the refrigeration apparatus in the foregoing embodiment.
The stop control device 01 for a compressor of a refrigeration apparatus includes: the device comprises an acquisition module 11, a judgment module 12 and a control module 13. The obtaining module 11 executes S1011 in the above method embodiment, the determining module 12 executes S101, S102, and S104 in the above method embodiment, and the control module 13 executes S103, S105, S106, S107, and S108 in the above method embodiment.
Specifically, the obtaining module 11 is configured to receive a shutdown instruction;
the judging module 12 is used for determining that the temperature of the temperature control area of the refrigeration equipment reaches a set temperature;
the judging module 12 is further configured to judge whether the rotation speed of the compressor is greater than a first preset rotation speed when it is determined that the temperature of the temperature control area of the refrigeration equipment reaches a set temperature; the control module 13 is configured to control the compressor to decelerate to a first preset rotation speed at a first preset acceleration if the judging module 12 determines that the rotation speed of the compressor is greater than the first preset rotation speed; the control module 13 is further configured to control the compressor to decelerate to a preset shutdown rotation speed at a second preset acceleration after the compressor decelerates to the first preset rotation speed;
and the control module 13 is further configured to control the compressor to stop after the compressor maintains the target duration at the preset stop speed.
Optionally, the determining module 12 is further configured to determine whether the rotation speed of the compressor is greater than the preset shutdown rotation speed if it is determined that the rotation speed of the compressor is not greater than the first preset rotation speed.
Optionally, the control module 13 is further configured to, when the obtaining module 11 receives a shutdown instruction or the determining module 12 determines that the temperature of the temperature control area of the refrigeration apparatus reaches the set temperature, if the determining module 12 determines that the rotation speed of the compressor is not greater than the first preset rotation speed and is greater than the preset shutdown rotation speed, control the compressor to decelerate to the preset shutdown rotation speed at a second preset acceleration; the control module 13 is further configured to control the compressor to stop after maintaining the target duration at the preset stop speed.
Optionally, the control module 13 is further configured to, when the obtaining module 11 receives a shutdown instruction or the determining module 12 determines that the temperature of the temperature controlled area of the refrigeration equipment reaches the set temperature, if the determining module 12 determines that the rotation speed of the compressor is not greater than the preset shutdown rotation speed, control the compressor to shutdown.
Optionally, the operating frequency of the compressor corresponding to the first preset rotation speed and the natural frequency of the box where the compressor is located cannot be evenly divided.
Optionally, the first preset rotation speed is a starting gear rotation speed of the compressor.
According to the shutdown control device of the compressor, when the acquisition module receives a shutdown instruction or the judgment module determines that the temperature of a temperature control area of the refrigeration equipment reaches a set temperature, the judgment module judges the rotating speed of the compressor, and if the rotating speed of the compressor is judged to be greater than a first preset rotating speed, the compressor is controlled to be decelerated to the first preset rotating speed at a first preset acceleration; after the compressor is decelerated to a first preset rotating speed, the compressor is controlled to be decelerated to a preset stop rotating speed at a second preset acceleration; wherein the second preset acceleration is smaller than the first preset acceleration; and finally, the control module controls the compressor to stop after maintaining the target time length at the preset stop rotating speed. According to the technical scheme provided by the application, the speed of the compressor with high rotation speed is reduced by different accelerations of first high and then low twice, so that the unbalanced tendency of the machine core of the compressor is gradually reduced and the resonance band is quickly avoided, and finally the machine core of the compressor is stopped after the speed is reduced to the preset stop rotation speed, so that the whole stop process of the compressor is more stable, the problems that the compressor shakes and the compressor shakes to generate noise due to the fact that asynchronous movement between the machine core and a shell of the compressor causes the compressor to shake and other factors when the machine core of the existing compressor stops in a high rotation speed state are solved, and the noise generated by the stop of the compressor is reduced; in addition, the rotation speed of the machine core of the compressor at the moment of stopping is small and stable due to two-stage speed reduction, so that the problem that the machine core shakes to generate cylinder collision at the moment of stopping due to the existence of pipeline stress is solved; in addition, the rotation speed of the compressor is guaranteed to be stable at the preset stop rotation speed through two-stage speed reduction and after the preset stop rotation speed is maintained for a long time, the possibility of large jitter generated when the compressor is directly stopped from a high rotation speed is further reduced, the stability of the compressor when the compressor is stopped is improved, and the stable stop of the compressor is realized.
As shown in fig. 14, the present embodiment also provides a shutdown control device for a compressor of a refrigeration apparatus, which includes a memory 21, a processor 22, a bus 23, and a communication interface 24; the memory 21 is used for storing computer execution instructions, and the processor 22 is connected with the memory 21 through a bus 23; when the stop control device of the compressor of the refrigeration equipment is operated, the processor 22 executes the computer execution instructions stored in the memory 21 to cause the stop control device of the compressor of the refrigeration equipment to execute the stop control method of the compressor of the refrigeration equipment provided in the above embodiment.
In particular implementations, processor 22(22-1 and 22-2) may include one or more Central Processing Units (CPUs), such as CPU0 and CPU1 shown in FIG. 14, as one example. And as an example, the stop control device of the compressor of the refrigeration apparatus may include a plurality of processors 22, such as the processor 22-1 and the processor 22-2 shown in fig. 14. Each of the processors 22 may be a single-Core Processor (CPU) or a multi-Core Processor (CPU). Processor 22 may refer herein to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).
The memory 21 may be, but is not limited to, a read-only memory 21 (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 21 may be self-contained and coupled to the processor 22 via a bus 23. The memory 21 may also be integrated with the processor 22.
In a specific implementation, the memory 21 is used for storing data in the present application and computer-executable instructions corresponding to software programs for executing the present application. The processor 22 may operate or execute software programs stored in the memory 21 and invoke data stored in the memory 21 to perform various functions of the shutdown control device for the compressor of the refrigeration appliance.
The communication interface 24 is any device, such as a transceiver, for communicating with other devices or communication networks, such as a control system, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), and the like. The communication interface 24 may include a receiving unit implementing a receiving function and a transmitting unit implementing a transmitting function.
The bus 23 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an extended ISA (enhanced industry standard architecture) bus, or the like. The bus 23 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 14, but this is not intended to represent only one bus or type of bus.
Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
The embodiment of the application further provides a computer storage medium, wherein the computer storage medium stores instructions, and when the computer executes the instructions, the computer is enabled to execute the shutdown control method of the compressor of the refrigeration equipment provided by the embodiment.
The computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a RAM, a ROM, an erasable programmable read-only memory (EPROM), a register, a hard disk, an optical fiber, a CD-ROM, an optical storage device, a magnetic storage device, any suitable combination of the foregoing, or any other form of computer readable storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuit (ASIC). In embodiments of the present application, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (6)
1. A refrigeration apparatus, comprising: the temperature detection device comprises a compressor, a temperature detection device and a control device;
the temperature detection device is used for detecting the temperature of a temperature control area of the refrigeration equipment;
the control device is configured to:
when a shutdown instruction is received or the detection temperature of the temperature detection device reaches a set temperature, if the rotating speed of the compressor is determined to be greater than a first preset rotating speed, the compressor is controlled to be decelerated to the first preset rotating speed at a first preset acceleration;
after the compressor is decelerated to the first preset rotating speed, controlling the compressor to decelerate to a preset stop rotating speed at a second preset acceleration; the second preset acceleration is smaller than the first preset acceleration;
controlling the compressor to stop after maintaining the preset stop rotating speed for a target time length;
the running frequency of the compressor corresponding to the first preset rotating speed and the natural frequency of a box body where the compressor is located cannot be evenly divided;
the first preset rotating speed is the starting gear rotating speed of the compressor.
2. The refrigeration appliance according to claim 1, characterized in that the control device is configured in particular to:
when a shutdown instruction is received or the detection temperature of the temperature detection device reaches a set temperature, if the rotating speed of the compressor is determined to be not greater than the first preset rotating speed and greater than the preset shutdown rotating speed, the compressor is controlled to be decelerated to the preset shutdown rotating speed at the second preset acceleration;
and controlling the compressor to stop after the compressor maintains the target duration at the preset stop rotating speed.
3. The refrigeration appliance according to claim 1, characterized in that the control device is configured in particular to:
and when a stop instruction is received or the detection temperature of the temperature detection device reaches a set temperature, if the rotating speed of the compressor is determined to be not greater than the preset stop rotating speed, controlling the compressor to stop.
4. A method of controlling shutdown of a compressor of a refrigeration apparatus, comprising:
when a shutdown instruction is received or the temperature of a temperature control area of the refrigeration equipment reaches a set temperature, if the rotating speed of the compressor is determined to be greater than a first preset rotating speed, the compressor is controlled to be decelerated to the first preset rotating speed at a first preset acceleration;
after the compressor is decelerated to the first preset rotating speed, controlling the compressor to decelerate to a preset stop rotating speed at a second preset acceleration; the second preset acceleration is smaller than the first preset acceleration;
controlling the compressor to stop after maintaining the preset stop rotating speed for a target time length;
the running frequency of the compressor corresponding to the first preset rotating speed and the natural frequency of a box body where the compressor is located cannot be evenly divided;
the first preset rotating speed is the starting gear rotating speed of the compressor.
5. The shutdown control method of the compressor of the refrigeration apparatus according to claim 4, characterized by further comprising:
when a shutdown instruction is received or the temperature of a temperature control area of the refrigeration equipment reaches a set temperature, if the rotating speed of the compressor is determined to be not greater than the first preset rotating speed and greater than the preset shutdown rotating speed, the compressor is controlled to be decelerated to the preset shutdown rotating speed at the second preset acceleration;
and controlling the compressor to stop after the compressor maintains the target duration at the preset stop rotating speed.
6. The shutdown control method of the compressor of the refrigeration apparatus according to claim 4, characterized by further comprising:
when a stop instruction is received or the temperature of a temperature control area of the refrigeration equipment reaches a set temperature, if the rotating speed of the compressor is determined to be not greater than a preset stop rotating speed, the compressor is controlled to stop.
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| CN1131266A (en) * | 1994-12-08 | 1996-09-18 | 株式会社东芝 | Refrigerating circulation arrangement |
| KR20050014287A (en) * | 2003-07-30 | 2005-02-07 | 엘지전자 주식회사 | Noise preventing device for air conditioner and method for the same |
| CN105698453A (en) * | 2016-03-09 | 2016-06-22 | 广东美的制冷设备有限公司 | Frequency conversion air conditioner and stop control method and stop control device for compressor of frequency conversion air conditioner |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131266A (en) * | 1994-12-08 | 1996-09-18 | 株式会社东芝 | Refrigerating circulation arrangement |
| KR20050014287A (en) * | 2003-07-30 | 2005-02-07 | 엘지전자 주식회사 | Noise preventing device for air conditioner and method for the same |
| CN105698453A (en) * | 2016-03-09 | 2016-06-22 | 广东美的制冷设备有限公司 | Frequency conversion air conditioner and stop control method and stop control device for compressor of frequency conversion air conditioner |
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