CN107989780B - Progress control method, operating control device and compressor - Google Patents
Progress control method, operating control device and compressor Download PDFInfo
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- CN107989780B CN107989780B CN201711133567.6A CN201711133567A CN107989780B CN 107989780 B CN107989780 B CN 107989780B CN 201711133567 A CN201711133567 A CN 201711133567A CN 107989780 B CN107989780 B CN 107989780B
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000004804 winding Methods 0.000 claims abstract description 270
- 230000001105 regulatory effect Effects 0.000 claims description 42
- 230000001276 controlling effect Effects 0.000 claims description 23
- 238000004364 calculation method Methods 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 230000004044 response Effects 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 description 19
- 230000008859 change Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 12
- 238000011897 real-time detection Methods 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- 230000002349 favourable effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Classifications
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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
- F04B49/065—Control using electricity and making use of computers
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of progress control method, operating control device and compressors, wherein progress control method includes: the real-time pressure drop for acquiring real-time circulating current and winding both ends in winding；According to real-time circulating current and real-time pressure drop, the power consumption of winding is calculated；Regulate and control the running frequency of compressor in real time according to power consumption.According to the technical solution of the present invention, while improving the stability and safety of compressor operation, the response efficiency of frequency control is improved, reduces the hardware manufacturing cost of compressor, and then the user experience is improved.
Description
Technical Field
The invention relates to a compressor control method, in particular to an operation control method, an operation control device and a compressor.
Background
During the operation of the compressor, the temperature of the winding of the compressor is too high due to the overload, the overlong operation time and the like, and the compressor can be possibly in failure.
In the related art, a control scheme of a compressor is provided, which specifically includes: and acquiring the surface temperature of the temperature detection winding, and adjusting the operating frequency of the compressor according to the surface temperature of the winding so as to enable the surface temperature of the winding of the compressor to be lower than the demagnetization temperature.
However, the method of adjusting the operating frequency of the compressor makes the time required for reducing the surface temperature of the winding longer, and an additional temperature detection device is required, which undoubtedly increases the manufacturing cost of the compressor, and in addition, the operating frequency is not adjusted in combination with the load state of the compressor, which is easy to generate ripple current and oscillation noise, which is not beneficial to improving the reliability of the compressor.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, it is an object of the present invention to provide an operation control method.
Another object of the present invention is to provide an operation control device.
It is a further object of the present invention to provide a compressor.
In order to achieve the above object, according to an embodiment of a first aspect of the present invention, there is provided an operation control method including: collecting real-time circulating current in a winding and real-time voltage drop at two ends of the winding; calculating the power consumption of the winding according to the real-time circulating current and the real-time voltage drop; and regulating and controlling the running frequency of the compressor in real time according to the power consumption.
In the technical scheme, the power consumption of the winding is determined by collecting the real-time circulating current in the winding of the compressor and the real-time voltage drop at two ends of the winding, and the running frequency of the compressor is further regulated, wherein the higher the power consumption of the winding is, the higher the heat production quantity of the compressor in the running process is, and the heat production quantity of the compressor directly influences the temperature of the winding of the compressor. Therefore, the running frequency of the compressor is regulated and controlled by determining the power consumption of the compressor winding, the response efficiency of frequency conversion control is improved, the real-time detection of the power consumption of the compressor winding is realized, a temperature detection device does not need to be additionally arranged, the hardware manufacturing cost of the compressor is reduced, and the popularization of the market of the compressor product is facilitated.
Wherein, the real-time circulating current in the compressor winding is the alternating current, and equally, its real-time pressure drop is alternating voltage, and both regard as the operation load of compressor, not only can the consumption of real-time detection compressor winding, can confirm the moment of adjusting the operating frequency according to the operation load moreover, can reduce ripple current and shock noise effectively, are favorable to the normal operating of compressor, and then have promoted user experience.
In any of the above technical solutions, preferably, calculating the power consumption of the winding according to the real-time circulating current and the real-time voltage drop specifically includes: calculating the winding resistance of the winding according to the real-time circulating current and the real-time voltage drop; determining the winding temperature according to a first corresponding relation between the winding resistance value and the preset winding temperature; and determining power consumption according to the second corresponding relation between the winding temperature and the preset power consumption.
In the technical scheme, the resistance value of the winding is calculated by collecting real-time circulating current and real-time voltage drop, and the resistance value of the winding and the temperature value meet a first corresponding relation. Therefore, the winding temperature can be determined in real time through the resistance value of the winding and the first corresponding relation, similarly, the winding temperature can be determined without arranging a temperature detection device, the operation frequency of the compressor can be regulated and controlled in real time according to the winding temperature, the stability and the safety of the operation of the compressor are improved, the response efficiency of frequency conversion control is improved, and the user experience is further improved.
Wherein the first correspondence between the winding resistance value and the winding temperature depends on the temperature coefficient of resistance of the winding material. For example, the temperature coefficient of resistance of copper is 0.00393, the temperature coefficient of resistance of aluminum is 0.00403, and the winding temperature change of the copper winding is smaller than the winding temperature change of the aluminum winding under the condition that the change amount of the winding resistance is the same.
In any of the above technical solutions, preferably, the calculating of the power consumption of the winding according to the real-time circulating current and the real-time voltage drop further includes: calculating the complex power of the compressor according to the real-time circulating current, the real-time voltage drop and a preset formula; determining a real part of the complex power as power consumption; wherein, the preset formula comprises:
wherein,for the purpose of real-time pressure drop,for real-time current circulation, P is power consumption, VmIs the maximum voltage value, ImAt maximum circulating current, θvPhase, θ, for real time voltage dropiFor the phase of the current flowing in real time, theta is thetavAnd thetaiThe phase difference between them.
In the technical scheme, the power consumption of the winding is calculated through real-time circulating current and real-time pressure drop, the running frequency of the compressor is regulated and controlled, and the temperature of the winding of the compressor is further regulated and controlled, wherein the real-time pressure dropReal-time circulating currentThat is, the power consumption of the compressor winding is the real part of the product of the real-time voltage drop and the real-time circulating current, then:
wherein theta is the phase difference between the real-time voltage drop and the real-time circulating current to obtain the power consumptionThe power consumption of the compressor winding is detected in real time, the winding temperature is indirectly determined according to the power consumption of the winding, and the winding temperature is determined in real time for adjustment on the premise of not arranging a temperature detection device.
In any of the above technical solutions, preferably, the adjusting and controlling the operating frequency of the compressor in real time according to the power consumption specifically includes: judging whether the power consumption is smaller than a first preset power consumption; when the power consumption is judged to be smaller than the first preset power consumption, controlling the running frequency of the compressor to be unchanged; and when the power consumption is judged to be larger than or equal to the first preset power consumption, the operation frequency of the compressor is adjusted to be reduced.
In the technical scheme, after the power consumption is determined by implementing the circulating current and the real-time pressure drop, the operating frequency of the compressor is correspondingly regulated and controlled according to the power consumption of the compressor winding, and the power consumption of the compressor winding is indirectly regulated and controlled by regulating and controlling the operating frequency of the compressor, so that the temperature of the compressor winding is controlled. When the power consumption of the compressor winding is less than the first preset power consumption, the temperature of the compressor winding is judged to belong to a normal temperature range at the moment, the compressor is controlled to keep the running frequency at the moment to continue running, when the power consumption of the compressor winding is more than or equal to the first preset power consumption, the temperature of the compressor winding is judged to be a high temperature range at the moment, the running frequency of the compressor is adjusted to be reduced, the power consumption of the compressor winding is reduced, and then the temperature of the compressor winding is reduced. The problem that the compressor fails due to overhigh temperature of the compressor winding is effectively solved, and the stability and the safety of the operation of the compressor are improved.
For example, the operation frequency of the compressor is 30Hz, when it is determined that the power consumption of the winding of the compressor is greater than or equal to a first preset power consumption and less than a second preset power consumption, the operation frequency of the compressor is adjusted to be reduced by 1Hz, the detection of the circulating current and the real-time voltage drop of the winding is real-time, and the power consumption of the winding is further continuously detected, and if the power consumption of the winding is still greater than the first preset power consumption, the operation frequency of the compressor is adjusted to be reduced by 1Hz again until the power consumption of the winding is less than the first preset power consumption or the operation frequency of the compressor is reduced to zero.
In any of the above technical solutions, preferably, when it is determined that the power consumption is greater than or equal to the first preset power consumption, the controlling operation frequency is reduced, specifically including: after the power consumption is judged to be larger than or equal to the first preset power consumption, judging whether the power consumption is larger than or equal to the second preset power consumption; when the power consumption is judged to be larger than or equal to the second preset power consumption, adjusting the running frequency of the compressor to be reduced to zero; and the second preset power consumption is larger than the first preset power consumption.
In the technical scheme, after the power consumption of the compressor is judged to be greater than or equal to the first preset power consumption, whether the power consumption is greater than or equal to the second preset power consumption is continuously judged, if the judgment result is yes, the temperature of a winding of the compressor is determined to be overhigh at the moment, the operation frequency of the compressor is directly controlled to be reduced to zero, and the compressor stops. By the method, the problem that the compressor fails due to overhigh temperature of the compressor winding is solved, the service life of the product is prolonged, and the user experience is improved.
In addition, the second preset power consumption is larger than the first preset power consumption, the first preset power consumption is used for judging whether the compressor is in a normal temperature state, and the second preset power consumption is used for judging whether the compressor needs shutdown protection.
According to an aspect of the second aspect of the present invention, there is provided an operation control device including: the collecting unit is used for collecting real-time circulating current in the winding and real-time voltage drop at two ends of the winding; the calculating unit is used for calculating the power consumption of the winding according to the real-time circulating current and the real-time voltage drop; and the regulating and controlling unit is used for regulating and controlling the running frequency of the compressor in real time according to the power consumption.
In the technical scheme, the power consumption of the winding is determined by collecting the real-time circulating current in the winding of the compressor and the real-time voltage drop at two ends of the winding, and the running frequency of the compressor is further regulated, wherein the higher the power consumption of the winding is, the higher the heat production quantity of the compressor in the running process is, and the heat production quantity of the compressor directly influences the temperature of the winding of the compressor. Therefore, the running frequency of the compressor is regulated and controlled by determining the power consumption of the compressor winding, the response efficiency of frequency conversion control is improved, the real-time detection of the power consumption of the compressor winding is realized, a temperature detection device does not need to be additionally arranged, the hardware manufacturing cost of the compressor is reduced, and the popularization of the market of the compressor product is facilitated.
Wherein, the real-time circulating current in the compressor winding is the alternating current, and equally, its real-time pressure drop is alternating voltage, and both regard as the operation load of compressor, not only can the consumption of real-time detection compressor winding, can confirm the moment of adjusting the operating frequency according to the operation load moreover, can reduce ripple current and shock noise effectively, are favorable to the normal operating of compressor, and then have promoted user experience.
In any of the above technical solutions, preferably, the method further includes: the calculation unit is also used for calculating the winding resistance value of the winding according to the real-time circulating current and the real-time voltage drop; the determining unit is used for determining the winding temperature according to the first corresponding relation between the winding resistance value and the preset winding temperature; and the determining unit is also used for determining the power consumption according to the second corresponding relation between the winding temperature and the preset power consumption.
In the technical scheme, the resistance value of the winding is calculated by collecting real-time circulating current and real-time voltage drop, and the resistance value of the winding and the temperature value meet a first corresponding relation. Therefore, the winding temperature can be determined in real time through the resistance value of the winding and the first corresponding relation, similarly, the winding temperature can be determined without arranging a temperature detection device, the operation frequency of the compressor can be regulated and controlled in real time according to the winding temperature, the stability and the safety of the operation of the compressor are improved, the response efficiency of frequency conversion control is improved, and the user experience is further improved.
Wherein the first correspondence between the winding resistance value and the winding temperature depends on the temperature coefficient of resistance of the winding material. For example, the temperature coefficient of resistance of copper is 0.00393, the temperature coefficient of resistance of aluminum is 0.00403, and the winding temperature change of the copper winding is smaller than the winding temperature change of the aluminum winding under the condition that the change amount of the winding resistance is the same.
In any of the above technical solutions, preferably, the method further includes: the calculating unit is also used for calculating the complex power of the compressor according to the real-time circulating current, the real-time voltage drop and a preset formula; the determining unit is further used for determining the real part of the complex power as power consumption; wherein, the preset formula comprises:
wherein,for the purpose of real-time pressure drop,for real-time current circulation, P is power consumption, VmIs the maximum voltage value, ImAt maximum circulating current, θvPhase, θ, for real time voltage dropiFor the phase of the current flowing in real time, theta is thetavAnd thetaiThe phase difference between them.
In the technical scheme, the power consumption of the winding is calculated through real-time circulating current and real-time pressure drop, the running frequency of the compressor is regulated and controlled, and the temperature of the winding of the compressor is further regulated and controlled, wherein the real-time pressure dropReal-time circulating currentThat is, the power consumption of the compressor winding is the real part of the product of the real-time voltage drop and the real-time circulating current, then:
wherein theta is the phase difference between the real-time voltage drop and the real-time circulating current to obtain the power consumptionThe power consumption of the compressor winding is detected in real time, the winding temperature is indirectly determined according to the power consumption of the winding, and the winding temperature is determined in real time for adjustment on the premise of not arranging a temperature detection device.
In any of the above technical solutions, preferably, the method further includes: the judging unit is used for judging whether the power consumption is smaller than first preset power consumption or not; when the power consumption is judged to be smaller than the first preset power consumption, controlling the running frequency of the compressor to be unchanged; and when the power consumption is judged to be larger than or equal to the first preset power consumption, the operation frequency of the compressor is adjusted to be reduced.
In the technical scheme, after the power consumption is determined by implementing the circulating current and the real-time pressure drop, the operating frequency of the compressor is correspondingly regulated and controlled according to the power consumption of the compressor winding, and the power consumption of the compressor winding is indirectly regulated and controlled by regulating and controlling the operating frequency of the compressor, so that the temperature of the compressor winding is controlled. When the power consumption of the compressor winding is less than the first preset power consumption, the temperature of the compressor winding is judged to belong to a normal temperature range at the moment, the compressor is controlled to keep the running frequency at the moment to continue running, when the power consumption of the compressor winding is more than or equal to the first preset power consumption, the temperature of the compressor winding is judged to be a high temperature range at the moment, the running frequency of the compressor is adjusted to be reduced, the power consumption of the compressor winding is reduced, and then the temperature of the compressor winding is reduced. The problem that the compressor fails due to overhigh temperature of the compressor winding is effectively solved, and the stability and the safety of the operation of the compressor are improved.
For example, the operation frequency of the compressor is 30Hz, when it is determined that the power consumption of the winding of the compressor is greater than or equal to a first preset power consumption and less than a second preset power consumption, the operation frequency of the compressor is adjusted to be reduced by 1Hz, the detection of the circulating current and the real-time voltage drop of the winding is real-time, and the power consumption of the winding is further continuously detected, and if the power consumption of the winding is still greater than the first preset power consumption, the operation frequency of the compressor is adjusted to be reduced by 1Hz again until the power consumption of the winding is less than the first preset power consumption or the operation frequency of the compressor is reduced to zero.
In any of the above technical solutions, the method further includes: the judging unit is also used for judging whether the power consumption is greater than or equal to a second preset power consumption or not after judging that the power consumption is greater than or equal to a first preset power consumption; when the power consumption is judged to be larger than or equal to the second preset power consumption, adjusting the running frequency of the compressor to be reduced to zero; and the second preset power consumption is larger than the first preset power consumption.
In the technical scheme, after the power consumption of the compressor is judged to be greater than or equal to the first preset power consumption, whether the power consumption is greater than or equal to the second preset power consumption is continuously judged, if the judgment result is yes, the temperature of a winding of the compressor is determined to be overhigh at the moment, the operation frequency of the compressor is directly controlled to be reduced to zero, and the compressor stops. By the method, the problem that the compressor fails due to overhigh temperature of the compressor winding is solved, the service life of the product is prolonged, and the user experience is improved.
In addition, the second preset power consumption is larger than the first preset power consumption, the first preset power consumption is used for judging whether the compressor is in a normal temperature state, and the second preset power consumption is used for judging whether the compressor needs shutdown protection.
According to an aspect of the third aspect of the present invention, there is provided a compressor, comprising a memory, a processor and a computer program stored in the memory and operable on the processor, wherein the processor implements the steps of the operation control method defined in any one of the above aspects when executing the computer program; and/or comprises the operation control device defined in any one of the above technical solutions.
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 above 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 shows a schematic flow diagram of an operation control method according to an embodiment of the invention;
FIG. 2 shows a schematic flow diagram of a power consumption calculation method according to one embodiment of the invention;
FIG. 3 shows a schematic flow diagram of a power consumption calculation method according to another embodiment of the invention;
FIG. 4 shows a schematic flow diagram of an operation control method according to another embodiment of the present invention;
FIG. 5 shows a schematic block diagram of an operation control device according to an embodiment of the present invention;
fig. 6 shows a schematic block diagram of a compressor according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
An operation control method according to an embodiment of the present invention will be specifically described below with reference to fig. 1 to 4.
Fig. 1 shows a schematic flow diagram of an operation control method according to an embodiment of the invention.
Fig. 2 shows a schematic flow diagram of a power consumption calculation method according to an embodiment of the invention.
Fig. 3 shows a schematic flow diagram of a power consumption calculation method according to another embodiment of the invention.
Fig. 4 shows a schematic flow diagram of an operation control method according to another embodiment of the present invention.
As shown in fig. 1, an operation control method according to an embodiment of the present invention includes: step S102, collecting real-time circulating current in a winding and real-time voltage drop at two ends of the winding; step S104, calculating the power consumption of the winding according to the real-time circulating current and the real-time voltage drop; and S106, regulating and controlling the running frequency of the compressor in real time according to the power consumption.
In the technical scheme, the power consumption of the winding is determined by collecting the real-time circulating current in the winding of the compressor and the real-time voltage drop at two ends of the winding, and the running frequency of the compressor is further regulated, wherein the higher the power consumption of the winding is, the higher the heat production quantity of the compressor in the running process is, and the heat production quantity of the compressor directly influences the temperature of the winding of the compressor. Therefore, the running frequency of the compressor is regulated and controlled by determining the power consumption of the compressor winding, the response efficiency of frequency conversion control is improved, the real-time detection of the power consumption of the compressor winding is realized, a temperature detection device does not need to be additionally arranged, the hardware manufacturing cost of the compressor is reduced, and the popularization of the market of the compressor product is facilitated.
Wherein, the real-time circulating current in the compressor winding is the alternating current, and equally, its real-time pressure drop is alternating voltage, and both regard as the operation load of compressor, not only can the consumption of real-time detection compressor winding, can confirm the moment of adjusting the operating frequency according to the operation load moreover, can reduce ripple current and shock noise effectively, are favorable to the normal operating of compressor, and then have promoted user experience.
As shown in fig. 2, calculating the power consumption of the winding according to the real-time circulating current and the real-time voltage drop specifically includes: step S202, calculating the winding resistance value of the winding according to the real-time circulating current and the real-time voltage drop; step S204, determining the winding temperature according to the first corresponding relation between the winding resistance value and the preset winding temperature; and step S206, determining power consumption according to the second corresponding relation between the winding temperature and the preset power consumption.
In the technical scheme, the resistance value of the winding is calculated by collecting real-time circulating current and real-time voltage drop, and the resistance value of the winding and the temperature value meet a first corresponding relation. Therefore, the winding temperature can be determined in real time through the resistance value of the winding and the first corresponding relation, similarly, the winding temperature can be determined without arranging a temperature detection device, the operation frequency of the compressor can be regulated and controlled in real time according to the winding temperature, the stability and the safety of the operation of the compressor are improved, the response efficiency of frequency conversion control is improved, and the user experience is further improved.
Wherein the first correspondence between the winding resistance value and the winding temperature depends on the temperature coefficient of resistance of the winding material. For example, the temperature coefficient of resistance of copper is 0.00393, the temperature coefficient of resistance of aluminum is 0.00403, and the winding temperature change of the copper winding is smaller than the winding temperature change of the aluminum winding under the condition that the change amount of the winding resistance is the same.
As shown in fig. 3, calculating the power consumption of the winding according to the real-time circulating current and the real-time voltage drop specifically includes: step S302, calculating the complex power of the compressor according to the real-time circulating current, the real-time voltage drop and a preset formula; step S304, determining the real part of the complex power as power consumption; wherein, the preset formula comprises:
wherein,for the purpose of real-time pressure drop,for real-time current circulation, P is power consumption, VmIs the maximum voltage value, ImAt maximum circulating current, θvPhase, θ, for real time voltage dropiFor the phase of the current flowing in real time, theta is thetavAnd thetaiThe phase difference between them.
In the technical scheme, the power consumption of the winding is calculated through real-time circulating current and real-time pressure drop, the running frequency of the compressor is regulated and controlled, and the temperature of the winding of the compressor is further regulated and controlled, wherein the real-time pressure dropReal-time circulating currentThat is, the power consumption of the compressor winding is the real part of the product of the real-time voltage drop and the real-time circulating current, then:
wherein theta is the phase difference between the real-time voltage drop and the real-time circulating current to obtain the power consumptionThe power consumption of the compressor winding is detected in real time, the winding temperature is indirectly determined according to the power consumption of the winding, and the winding temperature is determined in real time for adjustment on the premise of not arranging a temperature detection device.
As shown in fig. 4, the real-time regulation and control of the operating frequency of the compressor according to the power consumption specifically includes: step S402, collecting implementation circulating current in a winding and real-time voltage drop at two ends of the winding; step S404, calculating the power consumption of the winding according to the implementation circulating current and the real-time voltage drop; step S406, determining whether the power consumption is less than a first preset power consumption, if so, performing step S410, and if not, performing step S408; step S410, when the power consumption is judged to be less than the first preset power consumption, controlling the running frequency of the compressor to be unchanged; and step S408, when the power consumption is judged to be larger than or equal to the first preset power consumption, the running frequency of the compressor is adjusted to be reduced.
In the technical scheme, after the power consumption is determined by implementing the circulating current and the real-time pressure drop, the operating frequency of the compressor is correspondingly regulated and controlled according to the power consumption of the compressor winding, and the power consumption of the compressor winding is indirectly regulated and controlled by regulating and controlling the operating frequency of the compressor, so that the temperature of the compressor winding is controlled. When the power consumption of the compressor winding is less than the first preset power consumption, the temperature of the compressor winding is judged to belong to a normal temperature range at the moment, the compressor is controlled to keep the running frequency at the moment to continue running, when the power consumption of the compressor winding is more than or equal to the first preset power consumption, the temperature of the compressor winding is judged to be a high temperature range at the moment, the running frequency of the compressor is adjusted to be reduced, the power consumption of the compressor winding is reduced, and then the temperature of the compressor winding is reduced. The problem that the compressor fails due to overhigh temperature of the compressor winding is effectively solved, and the stability and the safety of the operation of the compressor are improved.
For example, the operation frequency of the compressor is 30Hz, when it is determined that the power consumption of the winding of the compressor is greater than or equal to a first preset power consumption and less than a second preset power consumption, the operation frequency of the compressor is adjusted to be reduced by 1Hz, the detection of the circulating current and the real-time voltage drop of the winding is real-time, and the power consumption of the winding is further continuously detected, and if the power consumption of the winding is still greater than the first preset power consumption, the operation frequency of the compressor is adjusted to be reduced by 1Hz again until the power consumption of the winding is less than the first preset power consumption or the operation frequency of the compressor is reduced to zero.
As shown in fig. 4, when it is determined that the power consumption is greater than or equal to the first preset power consumption, the controlling operation frequency is reduced, which specifically includes: step S412, after the power consumption is judged to be larger than or equal to the first preset power consumption, whether the power consumption is larger than or equal to the second preset power consumption is judged, if yes, step S414 is executed, and when the power consumption is judged to be larger than or equal to the second preset power consumption, the operation frequency of the compressor is adjusted to be reduced to zero; if not, executing step S408, and adjusting the running frequency of the compressor to be reduced; and the second preset power consumption is larger than the first preset power consumption.
In the technical scheme, after the power consumption of the compressor is judged to be greater than or equal to the first preset power consumption, whether the power consumption is greater than or equal to the second preset power consumption is continuously judged, if the judgment result is yes, the temperature of a winding of the compressor is determined to be overhigh at the moment, the operation frequency of the compressor is directly controlled to be reduced to zero, and the compressor stops. By the method, the problem that the compressor fails due to overhigh temperature of the compressor winding is solved, the service life of the product is prolonged, and the user experience is improved.
In addition, the second preset power consumption is larger than the first preset power consumption, the first preset power consumption is used for judging whether the compressor is in a normal temperature state, and the second preset power consumption is used for judging whether the compressor needs shutdown protection.
Fig. 5 shows a schematic block diagram of an operation control device 500 according to an embodiment of the present invention.
As shown in fig. 5, the operation control device 500 according to the embodiment of the present invention includes: the collecting unit 502 is used for collecting real-time circulating current in the winding and real-time voltage drop at two ends of the winding; a calculating unit 504, configured to calculate power consumption of the winding according to the real-time circulating current and the real-time voltage drop; and a regulating unit 506 for regulating the operating frequency of the compressor in real time according to the power consumption.
In the technical scheme, the power consumption of the winding is determined by collecting the real-time circulating current in the winding of the compressor and the real-time voltage drop at two ends of the winding, and the running frequency of the compressor is further regulated, wherein the higher the power consumption of the winding is, the higher the heat production quantity of the compressor in the running process is, and the heat production quantity of the compressor directly influences the temperature of the winding of the compressor. Therefore, the running frequency of the compressor is regulated and controlled by determining the power consumption of the compressor winding, the response efficiency of frequency conversion control is improved, the real-time detection of the power consumption of the compressor winding is realized, a temperature detection device does not need to be additionally arranged, the hardware manufacturing cost of the compressor is reduced, and the popularization of the market of the compressor product is facilitated.
Wherein, the real-time circulating current in the compressor winding is the alternating current, and equally, its real-time pressure drop is alternating voltage, and both regard as the operation load of compressor, not only can the consumption of real-time detection compressor winding, can confirm the moment of adjusting the operating frequency according to the operation load moreover, can reduce ripple current and shock noise effectively, are favorable to the normal operating of compressor, and then have promoted user experience.
In any of the above technical solutions, preferably, the method further includes: the calculating unit 504 is further configured to calculate a winding resistance value of the winding according to the real-time circulating current and the real-time voltage drop; a determining unit 508, configured to determine a winding temperature according to a first corresponding relationship between a winding resistance value and a preset winding temperature; the determining unit 508 is further configured to: and determining power consumption according to the second corresponding relation between the winding temperature and the preset power consumption.
In the technical scheme, the resistance value of the winding is calculated by collecting real-time circulating current and real-time voltage drop, and the resistance value of the winding and the temperature value meet a first corresponding relation. Therefore, the winding temperature can be determined in real time through the resistance value of the winding and the first corresponding relation, similarly, the winding temperature can be determined without arranging a temperature detection device, the operation frequency of the compressor can be regulated and controlled in real time according to the winding temperature, the stability and the safety of the operation of the compressor are improved, the response efficiency of frequency conversion control is improved, and the user experience is further improved.
Wherein the first correspondence between the winding resistance value and the winding temperature depends on the temperature coefficient of resistance of the winding material. For example, the temperature coefficient of resistance of copper is 0.00393, the temperature coefficient of resistance of aluminum is 0.00403, and the winding temperature change of the copper winding is smaller than the winding temperature change of the aluminum winding under the condition that the change amount of the winding resistance is the same.
In any of the above technical solutions, preferably, the calculating unit 504 is further configured to: calculating the complex power of the compressor according to the real-time circulating current, the real-time voltage drop and a preset formula; the determining unit 508 is further configured to: determining a real part of the complex power as power consumption; wherein, the preset formula comprises:
wherein,for the purpose of real-time pressure drop,for real-time current circulation, P is power consumption, VmIs the maximum voltage value, ImAt maximum circulating current, θvPhase, θ, for real time voltage dropiFor the phase of the current flowing in real time, theta is thetavAnd thetaiThe phase difference between them.
In the technical scheme, the power consumption of the winding is calculated through real-time circulating current and real-time pressure drop, the running frequency of the compressor is regulated and controlled, and the temperature of the winding of the compressor is further regulated and controlled, wherein the real-time pressure dropReal-time circulating currentThat is, the power consumption of the compressor winding is the real part of the product of the real-time voltage drop and the real-time circulating current, then:
wherein theta is the phase difference between the real-time voltage drop and the real-time circulating current to obtain the power consumptionThe power consumption of the compressor winding is detected in real time, the winding temperature is indirectly determined according to the power consumption of the winding, and the winding temperature is determined in real time for adjustment on the premise of not arranging a temperature detection device.
In any of the above technical solutions, preferably, the method further includes: a determining unit 510, configured to determine whether power consumption is less than a first preset power consumption; when the power consumption is judged to be smaller than the first preset power consumption, controlling the running frequency of the compressor to be unchanged; and when the power consumption is judged to be larger than or equal to the first preset power consumption, the operation frequency of the compressor is adjusted to be reduced.
In the technical scheme, after the power consumption is determined by implementing the circulating current and the real-time pressure drop, the operating frequency of the compressor is correspondingly regulated and controlled according to the power consumption of the compressor winding, and the power consumption of the compressor winding is indirectly regulated and controlled by regulating and controlling the operating frequency of the compressor, so that the temperature of the compressor winding is controlled. When the power consumption of the compressor winding is less than the first preset power consumption, the temperature of the compressor winding is judged to belong to a normal temperature range at the moment, the compressor is controlled to keep the running frequency at the moment to continue running, when the power consumption of the compressor winding is more than or equal to the first preset power consumption, the temperature of the compressor winding is judged to be a high temperature range at the moment, the running frequency of the compressor is adjusted to be reduced, the power consumption of the compressor winding is reduced, and then the temperature of the compressor winding is reduced. The problem that the compressor fails due to overhigh temperature of the compressor winding is effectively solved, and the stability and the safety of the operation of the compressor are improved.
For example, the operation frequency of the compressor is 30Hz, when it is determined that the power consumption of the winding of the compressor is greater than or equal to a first preset power consumption and less than a second preset power consumption, the operation frequency of the compressor is adjusted to be reduced by 1Hz, the detection of the circulating current and the real-time voltage drop of the winding is real-time, and the power consumption of the winding is further continuously detected, and if the power consumption of the winding is still greater than the first preset power consumption, the operation frequency of the compressor is adjusted to be reduced by 1Hz again until the power consumption of the winding is less than the first preset power consumption or the operation frequency of the compressor is reduced to zero.
In any of the above technical solutions, preferably, the determining unit 510 is further configured to: after the power consumption is judged to be larger than or equal to the first preset power consumption, judging whether the power consumption is larger than or equal to the second preset power consumption; when the power consumption is judged to be larger than or equal to the second preset power consumption, adjusting the running frequency of the compressor to be reduced to zero; and the second preset power consumption is larger than the first preset power consumption.
In the technical scheme, after the power consumption of the compressor is judged to be greater than or equal to the first preset power consumption, whether the power consumption is greater than or equal to the second preset power consumption is continuously judged, if the judgment result is yes, the temperature of a winding of the compressor is determined to be overhigh at the moment, the operation frequency of the compressor is directly controlled to be reduced to zero, and the compressor stops. By the method, the problem that the compressor fails due to overhigh temperature of the compressor winding is solved, the service life of the product is prolonged, and the user experience is improved.
In addition, the second preset power consumption is larger than the first preset power consumption, the first preset power consumption is used for judging whether the compressor is in a normal temperature state, and the second preset power consumption is used for judging whether the compressor needs shutdown protection.
Fig. 6 shows a schematic block diagram of a compressor according to an embodiment of the present invention.
As shown in fig. 6, a compressor 600 according to an embodiment of the present invention includes: the operation control method comprises the following steps of a memory, a processor and a computer program which is stored on the memory and can be operated on the processor, wherein the steps defined by the operation control method are realized when the processor executes the computer program; and/or include the operation control device 500 shown in fig. 5.
The technical scheme of the invention is explained in detail by combining the attached drawings, the invention provides an operation control method, an operation control device and a compressor, the power consumption of a winding is determined by collecting the real-time circulating current in the winding of the compressor and the real-time voltage drop at two ends of the winding, the operation frequency of the compressor is regulated and controlled by the power consumption of the winding of the compressor, the response efficiency of frequency conversion control is improved, the real-time detection of the power consumption of the winding of the compressor is realized, a temperature detection device is not required to be additionally arranged, the hardware manufacturing cost of the compressor is reduced, and the popularization of the market of the compressor product is facilitated. And, real-time circulating current in the compressor winding is the alternating current, and real-time voltage drop is alternating voltage, and both are as the operation load of compressor, not only can real-time detection compressor winding's consumption, can confirm the moment of adjusting the operating frequency according to the operation load moreover, can reduce ripple current and vibration noise effectively, are favorable to the normal operating of compressor, and then have promoted user experience.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. An operation control method applied to a compressor including a winding, characterized by comprising:
collecting real-time circulating current in the winding and real-time voltage drop at two ends of the winding;
calculating the power consumption of the winding according to the real-time circulating current and the real-time voltage drop;
and regulating and controlling the running frequency of the compressor in real time according to the power consumption.
2. The operation control method according to claim 1, wherein calculating the power consumption of the winding according to the real-time circulating current and the real-time voltage drop specifically comprises:
calculating the winding resistance value of the winding according to the real-time circulating current and the real-time voltage drop;
determining the winding temperature according to a first corresponding relation between the winding resistance value and a preset winding temperature;
and determining the power consumption according to the second corresponding relation between the winding temperature and the preset power consumption.
3. The operation control method according to claim 1, wherein calculating the power consumption of the winding according to the real-time circulating current and the real-time voltage drop further includes:
calculating the complex power of the compressor according to the real-time circulating current, the real-time pressure drop and a preset formula;
determining a real part of the complex power as the power consumption;
wherein the preset formula comprises:
wherein, theFor real-time pressure drop, theFor real-time circulating current, P is the power consumption, VmIs the maximum voltage value, ImFor maximum circulating current, thetavFor said real-time pressure dropOf said thetaiFor the phase of the real-time circulating current, the theta is the thetavAnd said thetaiThe phase difference between them.
4. The operation control method according to claim 1, wherein the operation frequency of the compressor is controlled in real time according to the power consumption, and specifically comprises:
judging whether the power consumption is smaller than a first preset power consumption or not;
when the power consumption is judged to be less than the first preset power consumption, controlling the running frequency of the compressor to be unchanged;
and when the power consumption is judged to be larger than or equal to the first preset power consumption, adjusting the running frequency of the compressor to be reduced.
5. The operation control method according to claim 4, wherein when it is determined that the power consumption is greater than or equal to the first preset power consumption, the controlling of the operation frequency to be decreased specifically includes:
after the power consumption is judged to be larger than or equal to the first preset power consumption, judging whether the power consumption is larger than or equal to a second preset power consumption;
adjusting the operating frequency of the compressor to be reduced to zero when the power consumption is determined to be greater than or equal to the second preset power consumption,
wherein the second preset power consumption is greater than the first preset power consumption.
6. An operation control device adapted to a compressor including a winding, characterized by comprising:
the collecting unit is used for collecting real-time circulating current in the winding and real-time voltage drop at two ends of the winding;
the calculation unit is used for calculating the power consumption of the winding according to the real-time circulating current and the real-time voltage drop;
and the regulating and controlling unit is used for regulating and controlling the running frequency of the compressor in real time according to the power consumption.
7. The operation control device according to claim 6, wherein calculating the power consumption of the winding based on the real-time circulating current and the real-time voltage drop specifically comprises:
the calculation unit is also used for calculating the winding resistance value of the winding according to the real-time circulating current and the real-time voltage drop;
the determining unit is used for determining the winding temperature according to a first corresponding relation between the winding resistance value and a preset winding temperature;
the determining unit is further configured to determine the power consumption according to a second corresponding relationship between the winding temperature and a preset power consumption.
8. The operation control device according to claim 7, wherein the power consumption of the winding is calculated based on the real-time circulating current and the real-time voltage drop, and specifically further comprises:
the calculating unit is also used for calculating the complex power of the compressor according to the real-time circulating current, the real-time pressure drop and a preset formula;
the determining unit is further configured to determine a real part of the complex power as the power consumption;
wherein the preset formula comprises:
wherein, theFor real-time pressure drop, theFor real-time circulating current, P is the power consumption, VmIs the maximum voltage value, ImFor maximum circulating current, thetavFor the phase of said real time pressure drop, said θiFor the phase of the real-time circulating current, the theta is the thetavAnd said thetaiThe phase difference between them.
9. The operation control device according to claim 6, wherein the controlling of the operating frequency of the compressor in real time according to the power consumption specifically comprises:
the judging unit is used for judging whether the power consumption is smaller than first preset power consumption or not;
when the power consumption is judged to be less than the first preset power consumption, controlling the running frequency of the compressor to be unchanged;
and when the power consumption is judged to be larger than or equal to the first preset power consumption, adjusting the running frequency of the compressor to be reduced.
10. The operation control device according to claim 9, wherein when it is determined that the power consumption is greater than or equal to the first preset power consumption, the controlling of the operation frequency to be decreased specifically includes:
the judging unit is further configured to judge whether the power consumption is greater than or equal to a second preset power consumption after judging that the power consumption is greater than or equal to the first preset power consumption;
adjusting the operating frequency of the compressor to be reduced to zero when the power consumption is determined to be greater than or equal to the second preset power consumption,
wherein the second preset power consumption is greater than the first preset power consumption.
11. A compressor comprising a memory, a processor and a computer program stored on the memory and executable on the processor,
the processor, when executing the computer program, implementing the steps as defined in any one of the operation control methods of claims 1 to 5;
and/or comprising an operation control device according to any one of claims 6 to 10.
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| CN1303171A (en) * | 1999-11-30 | 2001-07-11 | 松下电器产业株式会社 | Linear compressor driving device, medium and information assembly |
| CN104515245A (en) * | 2013-09-26 | 2015-04-15 | 珠海格力电器股份有限公司 | Control method and device of air conditioning system |
| CN105822535A (en) * | 2016-04-19 | 2016-08-03 | 广东美的制冷设备有限公司 | Control method and device of compressor and air conditioner |
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| JP3738062B2 (en) * | 1995-10-20 | 2006-01-25 | 三洋電機株式会社 | Linear compressor drive unit |
| KR102114310B1 (en) * | 2013-04-30 | 2020-06-05 | 엘지전자 주식회사 | An air conditioner and a method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1303171A (en) * | 1999-11-30 | 2001-07-11 | 松下电器产业株式会社 | Linear compressor driving device, medium and information assembly |
| CN104515245A (en) * | 2013-09-26 | 2015-04-15 | 珠海格力电器股份有限公司 | Control method and device of air conditioning system |
| CN105822535A (en) * | 2016-04-19 | 2016-08-03 | 广东美的制冷设备有限公司 | Control method and device of compressor and air conditioner |
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