CN112780538B - Variable frequency electric appliance, variable frequency controller and control method thereof - Google Patents
Variable frequency electric appliance, variable frequency controller and control method thereof Download PDFInfo
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- CN112780538B CN112780538B CN201911093436.9A CN201911093436A CN112780538B CN 112780538 B CN112780538 B CN 112780538B CN 201911093436 A CN201911093436 A CN 201911093436A CN 112780538 B CN112780538 B CN 112780538B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
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Abstract
The invention provides a variable frequency electric appliance, a variable frequency controller and a control method thereof, wherein the control method comprises the following steps: receiving a target rotating speed instruction; controlling the variable frequency load to operate according to the target rotating speed instruction; and recognizing that the power of the variable frequency load is lower than a preset first power threshold and higher than a preset second power threshold, and controlling the variable frequency load to reduce the rotating speed to operate. The control method of the variable frequency controller provided by the embodiment of the invention can effectively reduce the frequency of protecting the start and stop of the variable frequency load, reduce the instantaneous current impact and energy consumption of the start and stop of the variable frequency load, and prolong the service life of the variable frequency load and the variable frequency controller.
Description
Technical Field
The invention relates to the technical field of electric appliances, in particular to a control method of a variable frequency controller, the variable frequency controller and a variable frequency electric appliance with the variable frequency controller.
Background
The country releases and implements a new edition of 'limit value of power consumption of household refrigerator and energy efficiency grade', and the refrigerator is trending to save energy and reduce emission. At present, overload protection of a variable frequency controller used by a variable frequency compressor in a refrigerator is mainly a single-power threshold mechanism, when the running power of the compressor is higher than a set threshold, the compressor is stopped for protection, and when the running power of the compressor is lower than the set threshold, the compressor is restarted. Such traditional protection mechanism leads to frequency conversion compressor frequently to open and stop under high load operating condition, greatly increased the compressor and opened and stopped the energy consumption, can produce very big instantaneous current impact when the compressor starts to stop, so not only can increase the electric wire netting burden, more can influence compressor and frequency conversion controller's life.
Disclosure of Invention
The present invention is directed to solving, at least in part, one of the technical problems in the related art.
Therefore, a first objective of the present invention is to provide a control method for a variable frequency controller, which can effectively reduce the frequency of protecting the variable frequency load during start-stop, reduce the instantaneous current impact and energy consumption during start-stop of the variable frequency load, and prolong the service life of the variable frequency load and the variable frequency controller.
The second objective of the present invention is to provide a variable frequency controller.
The third purpose of the invention is to provide a variable frequency electric appliance.
A fourth object of the invention is to propose an electronic device.
A fifth object of the present invention is to propose a computer-readable storage medium.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a method for controlling a variable frequency controller, including: receiving a target rotating speed instruction; controlling the variable frequency load to operate according to the target rotating speed instruction; and recognizing that the power of the variable frequency load is lower than a preset first power threshold and higher than a preset second power threshold, and controlling the variable frequency load to reduce the rotating speed to operate.
According to the control method of the variable frequency controller provided by the embodiment of the invention, after receiving a target rotating speed instruction, the variable frequency controller controls the variable frequency load to operate according to the target rotating speed instruction, and if the variable frequency load is identified to have the power lower than a preset first power threshold and higher than a preset second power threshold, the variable frequency load is controlled to operate at a reduced rotating speed. Therefore, the method can effectively reduce the frequency of the protection start-stop of the variable frequency load, reduce the instantaneous current impact and energy consumption of the start-stop of the variable frequency load, and prolong the service life of the variable frequency load and the variable frequency controller.
In addition, the control method of the variable frequency controller proposed according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the method for controlling a variable frequency controller further includes: and recognizing that the power of the variable-frequency load is not higher than the second power threshold value, and controlling the variable-frequency load to operate according to the target rotating speed.
According to an embodiment of the present invention, the method for controlling a variable frequency controller further includes: and recognizing that the power of the variable-frequency load is not lower than the first power threshold, and controlling the variable-frequency load to stop.
According to an embodiment of the present invention, the method for controlling a variable frequency controller further includes: and identifying the first time preset when the variable frequency load operates at a reduced rotating speed, and controlling the variable frequency load to enter a speed reduction protection stage.
According to an embodiment of the present invention, the method for controlling a variable frequency controller further includes: and in the speed reduction protection stage, recognizing that the power of the variable frequency load is lower than the first power threshold and higher than the second power threshold, and controlling the variable frequency load to reduce the rotating speed to operate.
According to an embodiment of the present invention, the method for controlling a variable frequency controller further includes: and in the speed reduction protection stage, recognizing that the power of the variable frequency load is not higher than the second power threshold and higher than a preset third power threshold, and controlling the variable frequency load to keep the current rotating speed to operate.
According to an embodiment of the present invention, the method for controlling a variable frequency controller further includes: and in the speed reduction protection stage, recognizing that the power of the variable frequency load is not higher than the third power threshold, and controlling the variable frequency load to increase the rotating speed to operate.
According to an embodiment of the present invention, the method for controlling a variable frequency controller further includes: and in the speed reduction protection stage, recognizing that the power of the variable-frequency load is not lower than the first power threshold, and controlling the variable-frequency load to stop.
In order to achieve the above object, a second aspect of the present invention provides a variable frequency controller, including: the receiving module is used for receiving a target rotating speed instruction; the first control module is used for controlling the variable frequency load to operate according to the target rotating speed instruction; and the second control module is used for identifying that the power of the variable frequency load is lower than a preset first power threshold value and higher than a preset second power threshold value, and controlling the variable frequency load to rotate at a reduced speed.
According to the frequency conversion controller provided by the embodiment of the invention, the receiving module receives a target rotating speed instruction, the first control module controls the frequency conversion load to operate according to the target rotating speed instruction, and the second control module identifies that the power of the frequency conversion load is lower than a preset first power threshold value and higher than a preset second power threshold value, and controls the frequency conversion load to operate at a reduced rotating speed. Therefore, the frequency conversion controller can effectively reduce the frequency conversion load protection starting and stopping times, reduce the instantaneous current impact and energy consumption of starting and stopping the frequency conversion load, and prolong the service life of the frequency conversion load and the frequency conversion controller.
In addition, the frequency conversion controller proposed according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the second control module is further configured to identify that the power of the variable frequency load is not higher than the second power threshold, and control the variable frequency load to operate at the target rotation speed.
According to an embodiment of the present invention, the second control module is further configured to recognize that the power of the variable-frequency load is not lower than the first power threshold, and control the variable-frequency load to stop.
According to an embodiment of the present invention, the second control module is further configured to identify a preset first time when the variable frequency load operates at a reduced speed, and control the variable frequency load to enter a speed reduction protection phase.
According to an embodiment of the present invention, the second control module is further configured to, in the speed reduction protection phase, identify that the power of the variable frequency load is lower than the first power threshold and higher than the second power threshold, and control the variable frequency load to operate at a reduced rotation speed.
According to an embodiment of the present invention, the second control module is further configured to, in the speed reduction protection phase, recognize that the power of the variable frequency load is not higher than the second power threshold and is higher than a preset third power threshold, and control the variable frequency load to keep operating at the current rotation speed.
According to an embodiment of the present invention, the second control module is further configured to, in the speed reduction protection phase, recognize that the power of the variable frequency load is not higher than the third power threshold, and control the variable frequency load to operate at a higher rotation speed.
According to an embodiment of the present invention, the second control module is further configured to, in the speed reduction protection phase, recognize that the power of the variable frequency load is not lower than the first power threshold, and control the variable frequency load to stop.
In order to achieve the above object, a third aspect of the present invention provides an inverter appliance, which includes the inverter controller.
According to the variable frequency electric appliance provided by the embodiment of the invention, through the variable frequency controller, the frequency of protecting the start and stop of the variable frequency load can be effectively reduced, the instantaneous current impact and energy consumption of the start and stop of the variable frequency load are reduced, and the service lives of the variable frequency load and the variable frequency controller are prolonged.
To achieve the above object, a fourth aspect of the present invention provides an electronic device, including: the frequency conversion controller comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the program, the frequency conversion controller realizes the control method of the frequency conversion controller.
The electronic equipment provided by the embodiment of the invention can effectively reduce the frequency of the protection start-stop of the variable frequency load, reduce the instantaneous current impact and energy consumption of the start-stop of the variable frequency load, and prolong the service life of the variable frequency load and the variable frequency controller.
In order to achieve the above object, a fifth embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the control method of the variable frequency controller.
By executing the control method of the variable frequency controller, the computer readable storage medium of the embodiment of the invention can effectively reduce the frequency conversion load protection start-stop times, reduce the instantaneous current impact and energy consumption of the start-stop of the variable frequency load, and prolong the service life of the variable frequency load and the variable frequency controller.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of a method of controlling a variable frequency controller according to an embodiment of the invention;
FIG. 2 is a flow chart of a method of controlling a variable frequency controller according to one embodiment of the present invention;
FIG. 3 is a flow diagram of a downshift protection phase according to one embodiment of the present invention;
FIG. 4 is a flow chart of a method of controlling a variable frequency controller according to another embodiment of the present invention;
FIG. 5 is a block schematic diagram of a variable frequency controller according to an embodiment of the invention; and
fig. 6 is a block schematic diagram of a variable frequency appliance according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A control method of a variable frequency controller, and a variable frequency electric appliance having the variable frequency controller according to an embodiment of the present invention are described below with reference to the accompanying drawings.
Fig. 1 is a flowchart of a control method of a variable frequency controller according to an embodiment of the present invention. As shown in fig. 1, a control method of a variable frequency controller according to an embodiment of the present invention includes:
s1, receiving a target rotating speed instruction.
And S2, controlling the variable frequency load to operate according to the target rotating speed instruction.
And S3, recognizing that the power of the variable frequency load is lower than a preset first power threshold and higher than a preset second power threshold, and controlling the variable frequency load to reduce the rotating speed to operate.
It should be noted that the variable frequency controller preset the first power threshold value threshold 1 and the second power threshold value threshold 2, for example, the first power threshold value threshold 1 and the second power threshold value threshold 2 may be set according to the power specification of the variable frequency load (e.g., the variable frequency compressor) of the variable frequency electrical appliance (e.g., the variable frequency refrigerator, the air conditioner, etc.). Wherein ThresholdP1 > ThresholdP2.
Specifically, after the variable frequency controller is powered on, a target rotating speed instruction sent by a main control board of the variable frequency electrical appliance is received, the variable frequency controller drives the variable frequency load to operate according to the target rotating speed, the variable frequency controller monitors the power P of the variable frequency load in real time, and the power P of the variable frequency load is continuously increased along with the increase of the target rotating speed and the variable frequency load. When ThresholdP2 is less than P and less than ThresholdP1, the power of the variable frequency load is relatively high, and at the moment, the variable frequency controller does not need to control the variable frequency load to stop, but carries out speed reduction processing on the rotating speed of the variable frequency load. Therefore, frequent starting and stopping of the variable frequency load caused by overload protection during high-load running of the variable frequency load can be avoided, instantaneous current impact and loss during starting and stopping of the variable frequency load are reduced, and the service lives of the compressor and the variable frequency controller are prolonged.
According to an embodiment of the present invention, the method for controlling a variable frequency controller further includes: recognizing that the power of the variable-frequency load is not higher than a second power threshold value, and controlling the variable-frequency load to operate according to the target rotating speed; and recognizing that the power of the variable-frequency load is not lower than a first power threshold, and controlling the variable-frequency load to stop.
According to an embodiment of the present invention, the method for controlling a variable frequency controller further includes: and recognizing the first time preset when the variable frequency load reduces the rotating speed, and controlling the variable frequency load to enter a speed reduction protection stage. The preset first time may be set according to actual needs, and may be 1min, for example.
Specifically, after the variable frequency controller is powered on, a target rotating speed instruction sent by a main control board of the variable frequency electrical appliance is received, the variable frequency controller drives the variable frequency load to operate according to the target rotating speed, the variable frequency controller monitors the power P of the variable frequency load in real time, and the size relation between P and Threshold P2 and Threshold P1 is judged. As shown in fig. 2, in the normal rotation speed protection stage of the variable frequency controller, when P is greater than or equal to threshold P1, the variable frequency load is controlled to stop; when ThresholdP2 < P < ThresholdP1, controlling the variable frequency load to operate at a reduced rotating speed, for example, after controlling the variable frequency load to operate at the reduced rotating speed for a preset first time, such as 1min, controlling the variable frequency load to enter a speed reduction protection stage; and when P is less than or equal to Threshold P2, controlling the variable frequency load to operate according to the target rotating speed. Therefore, the frequency conversion load protection start-stop frequency can be effectively reduced, the instantaneous current impact and energy consumption of the start-stop of the frequency conversion load are reduced, and the service lives of the frequency conversion load and the frequency conversion controller are prolonged.
According to an embodiment of the present invention, the method for controlling a variable frequency controller further includes: in the speed reduction protection stage, recognizing that the power of the variable frequency load is lower than a first power threshold and higher than a second power threshold, and controlling the variable frequency load to reduce the rotating speed to operate; in the speed reduction protection stage, recognizing that the power of the variable frequency load is not higher than a second power threshold and is higher than a preset third power threshold, and controlling the variable frequency load to keep the current rotating speed to operate; in the speed reduction protection stage, recognizing that the power of the variable frequency load is not higher than a third power threshold value, controlling the variable frequency load to increase the rotating speed to operate; and in the speed reduction protection stage, recognizing that the power of the variable frequency load is not lower than a first power threshold value, and controlling the variable frequency load to stop.
It should be noted that the variable frequency controller preset the third power threshold value threshold 3, for example, the third power threshold value threshold may be set according to the power specification of the variable frequency load (e.g., variable frequency compressor) of the variable frequency electrical appliance (e.g., variable frequency refrigerator, air conditioner, etc.). Wherein ThresholdP1 > ThresholdP2 > ThresholdP3.
Specifically, as shown in fig. 3, in the speed reduction protection stage, the variable frequency controller monitors the power P of the variable frequency load in real time, and when P is greater than or equal to threshold P1, the variable frequency load is controlled to stop; when Threshold P2 is more than P and less than Threshold P1, controlling the variable frequency load to reduce the running speed so as to reduce the power; when ThresholdP3 is larger than P and is not larger than ThresholdP2, controlling the variable frequency load to keep the current running rotating speed unchanged; and when P is less than or equal to Threshold P3, controlling the variable frequency load to increase the running rotating speed so as to increase the power.
Therefore, compared with the overload protection control method in the related art, the control method for three-level power overload protection effectively reduces the overload protection shutdown times in the high-load operation process of the variable frequency load, reduces the instantaneous current impact and loss of the start-stop of the variable frequency load, and improves the energy efficiency and the service life of the variable frequency system. On the premise that the variable frequency load does not run in an overload mode, the running power of the variable frequency load can be kept at a high level, and the refrigeration requirement under the high-load working condition is met.
For example, the variable frequency controller presets three overload protection power detection thresholds, threshold 1, threshold 2 and threshold 3, wherein threshold 1 > threshold 2 > threshold 3.
Taking a variable frequency controller for a variable frequency compressor as an example, the first-stage overload protection power threshold (first power threshold) threshold p1 may be set to 400W, the second-stage overload protection power threshold (second power threshold) threshold p2 may be set to 350W, and the third-stage overload protection power threshold (third power threshold) threshold p3 may be set to 300W. After the variable frequency controller is electrified, a target rotating speed instruction signal from a refrigerator main control board is received, the variable frequency controller drives the variable frequency compressor to operate according to the target rotating speed, the variable frequency controller monitors the power value of the compressor, and the power of the compressor is continuously increased along with the increase of the target rotating speed and the load of the compressor.
In the normal rotating speed protection stage of the variable frequency compressor: when the power value is not lower than 400W, the variable frequency controller controls the compressor to stop; when the power value is not higher than 350W, the variable frequency controller drives the compressor to operate according to the target rotating speed; when the power value is lower than 400W and higher than 350W, the running rotating speed of the variable frequency compressor is reduced by 10 percent of the target rotating speed, and the compressor enters a speed reduction protection stage.
In the compressor deceleration protection stage: when the power value is lower than 400W and higher than 350W, the running rotating speed of the variable frequency compressor is reduced by 10% of the target rotating speed; when the power value is not higher than 350W and is higher than 300W, the current running rotating speed of the variable frequency compressor is kept unchanged; and when the power value is not higher than 300W, the running rotating speed of the variable frequency compressor is increased by 5 percent of the current rotating speed.
Therefore, by the control method of three-level power overload protection, the number of times of starting and stopping the compressor protection can be effectively reduced, the instantaneous current impact of starting and stopping the variable frequency compressor is reduced, and the service lives of the compressor and the variable frequency controller are prolonged.
To further explain the control method of the variable frequency controller according to the embodiment of the present invention, as shown in fig. 4, the control method of the variable frequency controller includes:
and S101, electrifying the variable frequency controller to operate.
And S102, operating according to the target rotating speed, wherein the descending speed = TargetSpeed, and the Rotationspeed = descending speed. The down speed is the rotational speed after the speed reduction, the TargetSpeed is the target rotational speed, and the RotationSpeed is the actual rotational speed. In step S102, the target rotational speed TargetSpeed is assigned to the decelerated rotational speed DownSpeed, and the decelerated rotational speed DownSpeed is assigned to the actual rotational speed RotationSpeed, that is, the actual rotational speed is operated according to the target rotational speed.
S103, judging whether P is larger than or equal to Threshold P1. If yes, go to step S112; if not, step S104 is executed.
S104, judging whether ThresholdP2 is more than P and less than ThresholdP 1. If yes, step S105 is executed, and if no, the process returns to step S102.
S105, judging whether the DownSpeed is greater than the TargetSpeed. If yes, returning to the step 102; if not, step S106 is executed. It should be noted that, since the speed reduction process is not performed for the first time when step S105 is executed, the speed down is actually equal to the target speed TargetSpeed, and if the speed down > TargetSpeed is obviously not established, step S106 is executed.
S106, the running speed is reduced by 10 percent, and the running is carried out for 1min, wherein the descending speed = the descending speed-0.1 × Targetspeed, rotationspeed = the descending speed. After the first deceleration operation for 1min, the rotational speed DownSpeed is 0.9 × targetspeed, and the actual rotational speed is DownSpeed =0.9 × targetspeed.
S107, judging whether ThresholdP2 is more than P and less than ThresholdP 1. If yes, returning to the step S105; if not, step S108 is performed. After the first speed reduction treatment, if threshold P2 < P < threshold P1 is established, the operating speed is continuously reduced by 10%, and the operation is performed for 1min.
S108, judging whether ThresholdP3 is more than P and less than or equal to ThresholdP2. If yes, go to step S109; if not, step S110 is executed.
And S109, operating at the current rotating speed, wherein the descending speed = the descending speed, and the RotationSpeed = the descending speed.
S110, judging whether P is less than or equal to Threshold P3. If yes, executing step S111; if not, step S112 is performed.
S111, operating speed increased by 5%, down speed = down speed 1.05, rotationspeed = down speed.
And S112, overload protection and shutdown of the variable frequency controller.
In summary, according to the control method of the variable frequency controller in the embodiment of the present invention, after receiving the target rotation speed instruction, the variable frequency controller controls the variable frequency load to operate at the target rotation speed according to the target rotation speed instruction, and if it is recognized that the power of the variable frequency load is lower than the preset first power threshold and higher than the preset second power threshold, the variable frequency load is controlled to operate at a reduced rotation speed. Therefore, the method can effectively reduce the frequency of the protection start and stop of the variable frequency load, reduce the instantaneous current impact and energy consumption of the start and stop of the variable frequency load, and prolong the service life of the variable frequency load and the variable frequency controller.
Fig. 5 is a block schematic diagram of a variable frequency controller according to an embodiment of the invention. As shown in fig. 5, the variable frequency controller according to the embodiment of the present invention includes: a receiving module 10, a first control module 20 and a second control module 30.
The receiving module 10 is configured to receive a target rotation speed instruction. The first control module 20 is configured to control the variable frequency load to operate at a target rotation speed according to a target rotation speed instruction. The second control module 30 is configured to recognize that the power of the variable frequency load is lower than a preset first power threshold and higher than a preset second power threshold, and control the variable frequency load to operate at a reduced rotation speed.
According to an embodiment of the present invention, the second control module 30 is further configured to recognize that the power of the variable frequency load is not higher than a second power threshold, and control the variable frequency load to operate at the target rotation speed; recognizing that the power of the variable-frequency load is not lower than a first power threshold, and controlling the variable-frequency load to stop; and identifying the first time preset when the variable frequency load operates at a reduced rotating speed, and controlling the variable frequency load to enter a speed reduction protection stage.
According to one embodiment of the invention, the second control module 30 is further configured to: in the speed reduction protection stage, recognizing that the power of the variable frequency load is lower than a first power threshold and higher than a second power threshold, and controlling the variable frequency load to reduce the rotating speed to operate; in the speed reduction protection stage, recognizing that the power of the variable frequency load is not higher than a second power threshold and is higher than a preset third power threshold, and controlling the variable frequency load to keep the current rotating speed to operate; in the speed reduction protection stage, recognizing that the power of the variable frequency load is not higher than a third power threshold value, controlling the variable frequency load to increase the rotating speed to operate; and in the deceleration protection stage, recognizing that the power of the variable-frequency load is not lower than a first power threshold, and controlling the variable-frequency load to stop.
It should be noted that details not disclosed in the variable frequency controller according to the embodiment of the present invention refer to details disclosed in the control method of the variable frequency controller according to the embodiment of the present invention, and are not repeated herein.
According to the variable frequency controller provided by the embodiment of the invention, the receiving module receives a target rotating speed instruction, the first control module controls the variable frequency load to operate according to the target rotating speed instruction, and the second control module identifies that the power of the variable frequency load is lower than a preset first power threshold and higher than a preset second power threshold, and controls the variable frequency load to operate at a reduced rotating speed. Therefore, the frequency conversion controller can effectively reduce the frequency conversion load protection starting and stopping times, reduce the instantaneous current impact and energy consumption of starting and stopping the frequency conversion load, and prolong the service life of the frequency conversion load and the frequency conversion controller.
Fig. 6 is a block schematic diagram of a variable frequency appliance according to an embodiment of the invention. As shown in fig. 6, the variable frequency electric appliance 1000 according to the embodiment of the present invention includes the variable frequency controller 100.
In an embodiment of the present invention, the inverter appliance 1000 may be an inverter refrigerator, an air conditioner, or the like.
According to the variable frequency electric appliance provided by the embodiment of the invention, through the variable frequency controller, the frequency of protecting the start and stop of the variable frequency load can be effectively reduced, the instantaneous current impact and energy consumption of the start and stop of the variable frequency load are reduced, and the service lives of the variable frequency load and the variable frequency controller are prolonged.
In addition, an embodiment of the present invention further provides an electronic device, which includes: the control method of the frequency conversion controller is realized when the processor executes the program.
The electronic equipment provided by the embodiment of the invention can effectively reduce the frequency of the protection start-stop of the variable frequency load, reduce the instantaneous current impact and energy consumption of the start-stop of the variable frequency load, and prolong the service life of the variable frequency load and the variable frequency controller.
In addition, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the control method of the frequency conversion controller.
By executing the control method of the variable frequency controller, the computer readable storage medium of the embodiment of the invention can effectively reduce the frequency of protecting the start and stop of the variable frequency load, reduce the instantaneous current impact and energy consumption of the start and stop of the variable frequency load, and prolong the service lives of the variable frequency load and the variable frequency controller.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer-readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (11)
1. A control method of a variable frequency controller is characterized by comprising the following steps:
receiving a target rotating speed instruction;
controlling the variable frequency load to operate according to the target rotating speed instruction;
recognizing that the power of the variable frequency load is lower than a preset first power threshold and higher than a preset second power threshold, and controlling the variable frequency load to reduce the rotating speed to operate;
recognizing a first time preset when the variable frequency load operates at a reduced rotating speed, and controlling the variable frequency load to enter a speed reduction protection stage;
in the speed reduction protection stage, recognizing that the power of the variable frequency load is lower than the first power threshold and higher than the second power threshold, and controlling the variable frequency load to operate at a reduced rotating speed;
in the speed reduction protection stage, recognizing that the power of the variable frequency load is not higher than the second power threshold and higher than a preset third power threshold, and controlling the variable frequency load to keep the current rotating speed to operate;
and in the speed reduction protection stage, recognizing that the power of the variable frequency load is not higher than the third power threshold, and controlling the variable frequency load to increase the rotating speed to operate.
2. The control method according to claim 1, characterized by further comprising:
and recognizing that the power of the variable-frequency load is not higher than the second power threshold value, and controlling the variable-frequency load to operate according to the target rotating speed.
3. The control method according to claim 1, characterized by further comprising:
and recognizing that the power of the variable-frequency load is not lower than the first power threshold, and controlling the variable-frequency load to stop.
4. The control method according to claim 1, characterized by further comprising:
and in the speed reduction protection stage, recognizing that the power of the variable frequency load is not lower than the first power threshold, and controlling the variable frequency load to stop.
5. A variable frequency controller, comprising:
the receiving module is used for receiving a target rotating speed instruction;
the first control module is used for controlling the variable frequency load to operate according to the target rotating speed instruction;
the second control module is used for identifying that the power of the variable frequency load is lower than a preset first power threshold and higher than a preset second power threshold, and controlling the variable frequency load to reduce the rotating speed to operate;
the second control module is also used for identifying the first time preset when the variable frequency load reduces the rotating speed to operate, and controlling the variable frequency load to enter a speed reduction protection stage;
in the speed reduction protection stage, recognizing that the power of the variable frequency load is lower than the first power threshold and higher than the second power threshold, and controlling the variable frequency load to operate at a reduced rotating speed;
in the speed reduction protection stage, recognizing that the power of the variable frequency load is not higher than the second power threshold and is higher than a preset third power threshold, and controlling the variable frequency load to keep the current rotating speed to operate;
and in the speed reduction protection stage, recognizing that the power of the variable frequency load is not higher than the third power threshold, and controlling the variable frequency load to increase the rotating speed to operate.
6. The variable frequency controller according to claim 5, wherein the second control module is further configured to identify that the power of the variable frequency load is not higher than the second power threshold, and control the variable frequency load to operate at the target rotation speed.
7. The variable frequency controller according to claim 5, wherein the second control module is further configured to recognize that the power of the variable frequency load is not lower than the first power threshold, and control the variable frequency load to stop.
8. The variable frequency controller according to claim 5, wherein the second control module is further configured to, in the speed-down protection phase, recognize that the power of the variable frequency load is not lower than the first power threshold, and control the variable frequency load to stop.
9. A variable frequency electrical appliance, comprising: a variable frequency controller as claimed in any one of claims 5 to 8.
10. An electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the method of controlling a variable frequency controller according to any of claims 1-4.
11. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a method of controlling a variable frequency controller according to any one of claims 1-4.
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| CN201911093436.9A CN112780538B (en) | 2019-11-11 | 2019-11-11 | Variable frequency electric appliance, variable frequency controller and control method thereof |
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| CN109327179B (en) * | 2017-07-31 | 2020-09-22 | 株洲中车时代电气股份有限公司 | Frequency converter power control method and frequency converter control device |
| CN108708847B (en) * | 2018-05-28 | 2020-08-04 | 四川长虹精密电子科技有限公司 | Overpower protection method for inverter compressor |
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