CN107869456B - Operation control method, operation control device and compressor - Google Patents
Operation control method, operation control device and compressor Download PDFInfo
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- CN107869456B CN107869456B CN201711133592.4A CN201711133592A CN107869456B CN 107869456 B CN107869456 B CN 107869456B CN 201711133592 A CN201711133592 A CN 201711133592A CN 107869456 B CN107869456 B CN 107869456B
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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
Abstract
The invention provides an operation control method, an operation control device and a compressor, wherein the operation control method comprises the following steps: collecting real-time circulating current in a winding and real-time voltage drop at two ends of the winding; calculating the real-time impedance of the winding according to the real-time circulating current and the real-time voltage drop; determining the temperature of the winding according to the corresponding relation between the real-time impedance and the preset winding temperature; and regulating and controlling the input current of the compressor in real time according to the temperature of the winding. The temperature of the winding is determined by calculating the real-time impedance of the compressor winding, so that the input current of the compressor is regulated, the response efficiency of frequency conversion control is improved, the real-time detection of the temperature of the compressor winding is realized, a resistance value acquisition device does not need to be additionally arranged, the hardware manufacturing cost of the compressor is reduced, and the market popularization of the compressor product is facilitated.
Description
Technical Field
The invention relates to the technical field of compressors, 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 over-heavy load, the over-long operation time and the like, which may cause the failure of the compressor, and the incomplete removal of the liquid refrigerant in the oil sump due to the insufficient temperature.
In the related art, a system for testing winding temperature is provided, which specifically includes: the resistance tester is used for detecting the cold resistance of the winding, the switch controller is switched off after the switch controller is switched on for a period of time, the hot resistance of the winding is detected, and the winding temperature is calculated according to the cold resistance and the hot resistance.
However, the resistance tester for detecting the winding resistance needs to additionally provide a resistance value acquisition device, which undoubtedly increases the manufacturing cost of the compressor, and in addition, a certain time is required in the process of measuring the cold resistance and the hot resistance, so that the response time is longer, which is not beneficial to improving the safety and stability 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 real-time impedance of the winding according to the real-time circulating current and the real-time voltage drop; determining the temperature of the winding according to the corresponding relation between the real-time impedance and the preset winding temperature; and regulating and controlling the input current of the compressor in real time according to the temperature of the winding.
In the technical scheme, the real-time impedance 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, the temperature of the winding is determined according to the corresponding relation between the real-time impedance and the preset winding temperature, and the input current of the compressor is regulated and controlled, so that the temperature of the winding of the compressor is indirectly controlled, and the safety and the stability of the operation of the air conditioner are improved. Wherein, the real-time impedance of compressor winding receives the temperature influence and changes, consequently can confirm the temperature of winding through the real-time impedance of calculating the compressor winding, and then judge the running state of compressor, effectively with the temperature control of compressor winding at preset within range, realized the real-time detection to the temperature of compressor winding, improved frequency conversion control's response efficiency, and need not additionally to set up resistance collection system, reduced the hardware manufacturing cost of compressor, be favorable to promoting the market of above-mentioned compressor product.
Wherein, the real-time circulating current in the compressor winding is the alternating current, and equally, its real-time pressure drop is alternating voltage, through the real-time detection to the two, can real-time detection compressor winding's resistance, and then the temperature of real-time detection compressor winding has shortened control response time effectively, is favorable to the normal operating of compressor, and then has promoted user experience.
In addition, the heat generation quantity of the compressor directly influences the temperature of the winding of the compressor, the direct factor influencing the heat generation quantity of the compressor is current, the input current of the compressor is regulated and controlled in real time through the temperature of the winding, the temperature of the winding is further controlled, the problem that the compressor fails due to overhigh temperature of the winding of the compressor is effectively solved, the problem that liquid refrigerant in an oil pool is incompletely expelled due to overlow temperature of the winding of the compressor is effectively solved, and the stability and the safety of the operation of the compressor are improved.
In any of the above technical schemesPreferably, the determining the temperature of the winding according to the corresponding relationship between the real-time impedance and the preset winding temperature specifically includes: determining rated resistance value and rated temperature of the winding; determining the temperature of the winding according to the rated resistance value, the rated temperature, the real-time impedance and a preset formula; the preset formula comprises:
where T is the temperature of the winding, T0Is the rated temperature, R, of the windingTIs the real-time impedance of the winding, R0The rated resistance value of the winding, and alpha is the temperature coefficient of resistance of the winding.
In the technical scheme, the real-time temperature can be determined through the real-time impedance, the rated resistance value, the rated temperature and the preset formula, the input current of the compressor is regulated and controlled, the temperature of the winding of the compressor is further regulated and controlled in real time, 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. The preset formula comprises: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 addition, when the compressor is in an initial running state, the rated temperature is determined according to the ambient temperature, the rated resistance is determined according to the voltage drop and the circulating current in the initial state, an additional resistance value acquisition device is not needed, and the hardware manufacturing cost of the compressor is reduced.
In any of the above technical solutions, preferably, the adjusting and controlling the input current of the compressor in real time according to the temperature of the winding specifically includes: judging whether the temperature of the winding is lower than a first preset temperature or not; when the temperature of the winding is judged to be lower than the first preset temperature, increasing the input current of the compressor; and when the temperature of the winding is judged to be greater than or equal to the first preset temperature, controlling the input current of the compressor to be reduced or unchanged.
In the technical scheme, the real-time impedance of the winding of the compressor is detected in real time, the temperature of the winding is determined according to the impedance of the winding, when the temperature of the winding is lower than a first preset temperature, the temperature of the winding of the compressor is determined to be in a low-temperature state, the input current of the compressor is increased, when the temperature of the winding is higher than or equal to the first preset temperature, the temperature of the winding of the compressor is determined to be in a normal temperature or a high-temperature state, the input current of the compressor is controlled to be reduced or unchanged, the input current of the compressor is regulated and controlled in real time through the temperature of the winding, the stability and the safety of the operation of the compressor are improved, the problem that incomplete expelling of liquid refrigerants in an oil pool due to insufficient temperature of the winding.
In any of the above technical solutions, preferably, when it is determined that the temperature of the winding is greater than or equal to the first preset temperature, controlling the input current of the compressor to be reduced or unchanged specifically includes: after the temperature of the winding is judged to be higher than the first preset temperature, judging whether the temperature of the winding is lower than or equal to a second preset temperature; and when the temperature of the winding is judged to be less than or equal to a second preset temperature, controlling the input current of the compressor to be unchanged, and when the temperature of the winding is judged to be greater than the second preset temperature, reducing the input current of the compressor, wherein the second preset temperature is greater than the first preset temperature.
In the technical scheme, the real-time impedance of the winding of the compressor is detected in real time, the temperature of the winding is determined according to the impedance of the winding, under the condition that the temperature of the winding is judged to be greater than or equal to the first preset temperature, when the temperature of the winding is less than or equal to the second preset temperature, the temperature of the winding of the compressor is determined to be in a normal temperature state, the input current of the compressor is controlled to be unchanged, when the temperature of the winding is greater than the second preset temperature, demagnetization or fusing of the compressor can be caused, the input current of the compressor is reduced, the input current of the compressor is regulated and controlled in real time through the temperature of the winding, the stability and the safety of the operation of the compressor are improved, the problem that the compressor fails due to overhigh temperature of the winding of the compressor is effectively reduced.
In any of the above technical solutions, preferably, when it is determined that the temperature of the winding is greater than the second preset temperature, reducing the input current of the compressor specifically includes: after the temperature of the winding is judged to be higher than the second preset temperature, judging whether the temperature of the winding is higher than or equal to a third preset temperature; and when the temperature of the winding is judged to be greater than or equal to a third preset temperature, controlling the input current of the compressor to be reduced to zero, wherein the third preset temperature is greater than the second preset temperature.
In the technical scheme, after the temperature of the winding is judged to be higher than the second preset temperature, whether the temperature of the winding is larger than or equal to the third preset temperature or not is continuously judged, if the judgment result is yes, the fact that the temperature of the winding of the compressor is too high at the moment is determined, the compressor is in an overload running state, and the input current of the compressor is directly controlled to be reduced to zero, namely the compressor is shut down, the problem that the compressor fails due to the fact that the temperature of the winding of the compressor is too high is solved, the service life of a product is prolonged, and user experience is improved.
For example, the input current of the compressor is 50 × sin ω t, if the temperature of the winding is determined to be less than the first preset temperature, the input current of the compressor is adjusted to be increased to 100 × sin ω t, if the temperature of the winding is determined to be greater than the first preset temperature and less than or equal to the second preset temperature, the input current of the compressor is controlled to be still 50 × sin ω t, if the temperature of the winding is determined to be greater than the second preset temperature and less than or equal to the third preset temperature, the input current of the compressor is adjusted to be decreased to 25 × sin ω t, and if the temperature of the winding is determined to be greater than or equal to the third preset temperature, the input current of the compressor is adjusted to be decreased to zero.
It is worth particularly pointing out that the preset winding temperature, the first preset temperature, the second preset temperature and the third preset temperature are all determined according to the model of the compressor, and those skilled in the art can modify and adjust the preset parameters according to the operation scene of the compressor.
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 real-time impedance of the winding according to the real-time circulating current and the real-time voltage drop; the determining unit is used for determining the temperature of the winding according to the corresponding relation between the real-time impedance and the preset winding temperature; and the regulating and controlling unit is used for regulating and controlling the input current of the compressor in real time according to the temperature of the winding.
In the technical scheme, the real-time impedance 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, the temperature of the winding is determined according to the corresponding relation between the real-time impedance and the preset winding temperature, and the input current of the compressor is regulated and controlled, so that the temperature of the winding of the compressor is indirectly controlled, and the safety and the stability of the operation of the air conditioner are improved. Wherein, the real-time impedance of compressor winding receives the temperature influence and changes, consequently can confirm the temperature of winding through the real-time impedance of calculating the compressor winding, and then judge the running state of compressor, effectively with the temperature control of compressor winding at preset within range, realized the real-time detection to the temperature of compressor winding, improved frequency conversion control's response efficiency, and need not additionally to set up resistance collection system, reduced the hardware manufacturing cost of compressor, be favorable to promoting the market of above-mentioned compressor product.
Wherein, the real-time circulating current in the compressor winding is the alternating current, and equally, its real-time pressure drop is alternating voltage, through the real-time detection to the two, can real-time detection compressor winding's resistance, and then the temperature of real-time detection compressor winding has shortened control response time effectively, is favorable to the normal operating of compressor, and then has promoted user experience.
In addition, the heat generation quantity of the compressor directly influences the temperature of the winding of the compressor, the direct factor influencing the heat generation quantity of the compressor is current, the input current of the compressor is regulated and controlled in real time through the temperature of the winding, the temperature of the winding is further controlled, the problem that the compressor fails due to overhigh temperature of the winding of the compressor is effectively solved, the problem that liquid refrigerant in an oil pool is incompletely expelled due to overlow temperature of the winding of the compressor is effectively solved, and the stability and the safety of the operation of the compressor are improved.
In any of the above technical solutions, preferably, the determining unit is further configured to: defining windingsRated resistance and rated temperature; the determination unit is further configured to: determining the temperature of the winding according to the rated resistance value, the rated temperature, the real-time impedance and a preset formula; the preset formula comprises:
where T is the temperature of the winding, T0Is the rated temperature, R, of the windingTIs the real-time impedance of the winding, R0The rated resistance value of the winding, and alpha is the temperature coefficient of resistance of the winding.
In the technical scheme, the real-time temperature can be determined through the real-time impedance, the rated resistance value, the rated temperature and the preset formula, the input current of the compressor is regulated and controlled, the temperature of the winding of the compressor is further regulated and controlled in real time, 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. The preset formula comprises:
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 addition, when the compressor is in an initial running state, the rated temperature is determined according to the ambient temperature, the rated resistance is determined according to the voltage drop and the circulating current in the initial state, an additional resistance value acquisition device is not needed, and the hardware manufacturing cost of the compressor is reduced.
In any one of the above technical solutions, preferably, the operation control device further includes: the judging unit is used for judging whether the temperature of the winding is less than a first preset temperature or not; the regulatory unit is further configured to: when the temperature of the winding is judged to be lower than the first preset temperature, increasing the input current of the compressor; the regulatory unit is further configured to: and when the temperature of the winding is judged to be greater than or equal to the first preset temperature, controlling the input current of the compressor to be reduced or unchanged.
In the technical scheme, the real-time impedance of the winding of the compressor is detected in real time, the temperature of the winding is determined according to the impedance of the winding, when the temperature of the winding is lower than a first preset temperature, the temperature of the winding of the compressor is determined to be in a low-temperature state, the input current of the compressor is increased, when the temperature of the winding is higher than or equal to the first preset temperature, the temperature of the winding of the compressor is determined to be in a normal temperature or a high-temperature state, the input current of the compressor is controlled to be reduced or unchanged, the input current of the compressor is regulated and controlled in real time through the temperature of the winding, the stability and the safety of the operation of the compressor are improved, the problem that incomplete expelling of liquid refrigerants in an oil pool due to insufficient temperature of the winding.
In any one of the above technical solutions, preferably, the determining unit is further configured to: after the temperature of the winding is judged to be higher than the first preset temperature, judging whether the temperature of the winding is lower than or equal to a second preset temperature; the regulatory unit is further configured to: when the temperature of the winding is judged to be less than or equal to a second preset temperature, controlling the input current of the compressor to be unchanged; the regulatory unit is further configured to: and when the temperature of the winding is judged to be higher than a second preset temperature, reducing the input current of the compressor, wherein the second preset temperature is higher than the first preset temperature.
In the technical scheme, the real-time impedance of the winding of the compressor is detected in real time, the temperature of the winding is determined according to the impedance of the winding, under the condition that the temperature of the winding is judged to be greater than or equal to the first preset temperature, when the temperature of the winding is less than or equal to the second preset temperature, the temperature of the winding of the compressor is determined to be in a normal temperature state, the input current of the compressor is controlled to be unchanged, when the temperature of the winding is greater than the second preset temperature, demagnetization or fusing of the compressor can be caused, the input current of the compressor is reduced, the input current of the compressor is regulated and controlled in real time through the temperature of the winding, the stability and the safety of the operation of the compressor are improved, the problem that the compressor fails due to overhigh temperature of the winding of the compressor is effectively reduced.
In any one of the above technical solutions, preferably, the determining unit is further configured to: after the temperature of the winding is judged to be higher than the second preset temperature, judging whether the temperature of the winding is higher than or equal to a third preset temperature; the regulatory unit is further configured to: and when the temperature of the winding is judged to be greater than or equal to a third preset temperature, controlling the input current of the compressor to be reduced to zero, wherein the third preset temperature is greater than the second preset temperature.
In the technical scheme, after the temperature of the winding is judged to be higher than the second preset temperature, whether the temperature of the winding is larger than or equal to the third preset temperature or not is continuously judged, if the judgment result is yes, the fact that the temperature of the winding of the compressor is too high at the moment is determined, the compressor is in an overload running state, and the input current of the compressor is directly controlled to be reduced to zero, namely the compressor is shut down, the problem that the compressor fails due to the fact that the temperature of the winding of the compressor is too high is solved, the service life of a product is prolonged, and user experience is improved.
For example, the input current of the compressor is 50 × sin ω t, if the temperature of the winding is determined to be less than the first preset temperature, the input current of the compressor is adjusted to be increased to 100 × sin ω t, if the temperature of the winding is determined to be greater than the first preset temperature and less than or equal to the second preset temperature, the input current of the compressor is controlled to be still 50 × sin ω t, if the temperature of the winding is determined to be greater than the second preset temperature and less than or equal to the third preset temperature, the input current of the compressor is adjusted to be decreased to 25 × sin ω t, and if the temperature of the winding is determined to be greater than or equal to the third preset temperature, the input current of the compressor is adjusted to be decreased to zero.
It is worth particularly pointing out that the preset winding temperature, the first preset temperature, the second preset temperature and the third preset temperature are all determined according to the model of the compressor, and those skilled in the art can modify and adjust the preset parameters according to the operation scene of the compressor.
According to the technical scheme of the third aspect of the invention, a compressor is provided, which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor, wherein the steps defined by the running control method are realized when the computer program is executed by the processor; and/or an operation control device including any one of the above.
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 block diagram of an operation control device according to an embodiment of the present invention;
fig. 3 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 scheme according to an embodiment of the present invention will be specifically described below with reference to fig. 1 to 3.
Fig. 1 shows a schematic flow diagram of an operation control method according to an embodiment of the 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 real-time impedance of the winding according to the real-time circulating current and the real-time voltage drop; step S106, determining the temperature of the winding according to the corresponding relation between the real-time impedance and the preset winding temperature; and step S108, regulating and controlling the input current of the compressor in real time according to the temperature of the winding.
In the technical scheme, the real-time impedance 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, the temperature of the winding is determined according to the corresponding relation between the real-time impedance and the preset winding temperature, and the input current of the compressor is regulated and controlled, so that the temperature of the winding of the compressor is indirectly controlled, and the safety and the stability of the operation of the air conditioner are improved. Wherein, the real-time impedance of compressor winding receives the temperature influence and changes, consequently can confirm the temperature of winding through the real-time impedance of calculating the compressor winding, and then judge the running state of compressor, effectively with the temperature control of compressor winding at preset within range, realized the real-time detection to the temperature of compressor winding, improved frequency conversion control's response efficiency, and need not additionally to set up resistance collection system, reduced the hardware manufacturing cost of compressor, be favorable to promoting the market of above-mentioned compressor product.
Wherein, the real-time circulating current in the compressor winding is the alternating current, and equally, its real-time pressure drop is alternating voltage, through the real-time detection to the two, can real-time detection compressor winding's resistance, and then the temperature of real-time detection compressor winding has shortened control response time effectively, is favorable to the normal operating of compressor, and then has promoted user experience.
In addition, the heat generation quantity of the compressor directly influences the temperature of the winding of the compressor, the direct factor influencing the heat generation quantity of the compressor is current, the input current of the compressor is regulated and controlled in real time through the temperature of the winding, the temperature of the winding is further controlled, the problem that the compressor fails due to overhigh temperature of the winding of the compressor is effectively solved, the problem that liquid refrigerant in an oil pool is incompletely expelled due to overlow temperature of the winding of the compressor is effectively solved, and the stability and the safety of the operation of the compressor are improved.
In any of the above technical solutions, preferably, determining the temperature of the winding according to the corresponding relationship between the real-time impedance and the preset winding temperature specifically includes: determining rated resistance value and rated temperature of the winding; determining the temperature of the winding according to the rated resistance value, the rated temperature, the real-time impedance and a preset formula; the preset formula comprises:
where T is the temperature of the winding, T0Is the rated temperature, R, of the windingTIs the real-time impedance of the winding, R0The rated resistance value of the winding, and alpha is the temperature coefficient of resistance of the winding.
In the technical scheme, the real-time temperature can be determined through the real-time impedance, the rated resistance value, the rated temperature and the preset formula, the input current of the compressor is regulated and controlled, the temperature of the winding of the compressor is further regulated and controlled in real time, 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. The preset formula comprises:
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 addition, when the compressor is in an initial running state, the rated temperature is determined according to the ambient temperature, the rated resistance is determined according to the voltage drop and the circulating current in the initial state, an additional resistance value acquisition device is not needed, and the hardware manufacturing cost of the compressor is reduced.
In any of the above technical solutions, preferably, the adjusting and controlling the input current of the compressor in real time according to the temperature of the winding specifically includes: judging whether the temperature of the winding is lower than a first preset temperature or not; when the temperature of the winding is judged to be lower than the first preset temperature, increasing the input current of the compressor; and when the temperature of the winding is judged to be greater than or equal to the first preset temperature, controlling the input current of the compressor to be reduced or unchanged.
In the technical scheme, the real-time impedance of the winding of the compressor is detected in real time, the temperature of the winding is determined according to the impedance of the winding, when the temperature of the winding is lower than a first preset temperature, the temperature of the winding of the compressor is determined to be in a low-temperature state, the input current of the compressor is increased, when the temperature of the winding is higher than or equal to the first preset temperature, the temperature of the winding of the compressor is determined to be in a normal temperature or a high-temperature state, the input current of the compressor is controlled to be reduced or unchanged, the input current of the compressor is regulated and controlled in real time through the temperature of the winding, the stability and the safety of the operation of the compressor are improved, the problem that incomplete expelling of liquid refrigerants in an oil pool due to insufficient temperature of the winding.
In any of the above technical solutions, preferably, when it is determined that the temperature of the winding is greater than or equal to the first preset temperature, controlling the input current of the compressor to be reduced or unchanged specifically includes: after the temperature of the winding is judged to be higher than the first preset temperature, judging whether the temperature of the winding is lower than or equal to a second preset temperature; and when the temperature of the winding is judged to be less than or equal to a second preset temperature, controlling the input current of the compressor to be unchanged, and when the temperature of the winding is judged to be greater than the second preset temperature, reducing the input current of the compressor, wherein the second preset temperature is greater than the first preset temperature.
In the technical scheme, the real-time impedance of the winding of the compressor is detected in real time, the temperature of the winding is determined according to the impedance of the winding, under the condition that the temperature of the winding is judged to be greater than or equal to the first preset temperature, when the temperature of the winding is less than or equal to the second preset temperature, the temperature of the winding of the compressor is determined to be in a normal temperature state, the input current of the compressor is controlled to be unchanged, when the temperature of the winding is greater than the second preset temperature, demagnetization or fusing of the compressor can be caused, the input current of the compressor is reduced, the input current of the compressor is regulated and controlled in real time through the temperature of the winding, the stability and the safety of the operation of the compressor are improved, the problem that the compressor fails due to overhigh temperature of the winding of the compressor is effectively reduced.
In any of the above technical solutions, preferably, when it is determined that the temperature of the winding is greater than the second preset temperature, reducing the input current of the compressor specifically includes: after the temperature of the winding is judged to be higher than the second preset temperature, judging whether the temperature of the winding is higher than or equal to a third preset temperature; and when the temperature of the winding is judged to be greater than or equal to a third preset temperature, controlling the input current of the compressor to be reduced to zero, wherein the third preset temperature is greater than the second preset temperature.
In the technical scheme, after the temperature of the winding is judged to be higher than the second preset temperature, whether the temperature of the winding is larger than or equal to the third preset temperature or not is continuously judged, if the judgment result is yes, the fact that the temperature of the winding of the compressor is too high at the moment is determined, the compressor is in an overload running state, and the input current of the compressor is directly controlled to be reduced to zero, namely the compressor is shut down, the problem that the compressor fails due to the fact that the temperature of the winding of the compressor is too high is solved, the service life of a product is prolonged, and user experience is improved.
For example, the input current of the compressor is 50 × sin ω t, if the temperature of the winding is determined to be less than the first preset temperature, the input current of the compressor is adjusted to be increased to 100 × sin ω t, if the temperature of the winding is determined to be greater than the first preset temperature and less than or equal to the second preset temperature, the input current of the compressor is controlled to be still 50 × sin ω t, if the temperature of the winding is determined to be greater than the second preset temperature and less than or equal to the third preset temperature, the input current of the compressor is adjusted to be decreased to 25 × sin ω t, and if the temperature of the winding is determined to be greater than or equal to the third preset temperature, the input current of the compressor is adjusted to be decreased to zero.
It is worth particularly pointing out that the preset winding temperature, the first preset temperature, the second preset temperature and the third preset temperature are all determined according to the model of the compressor, and those skilled in the art can modify and adjust the preset parameters according to the operation scene of the compressor.
Fig. 2 shows a schematic block diagram of an operation control device 200 according to an embodiment of the present invention.
As shown in fig. 2, an operation control device 200 according to an embodiment of the present invention includes: the collecting unit 202 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 204 is used for calculating the real-time impedance of the winding according to the real-time circulating current and the real-time voltage drop; the determining unit 206 is configured to determine the temperature of the winding according to the corresponding relationship between the real-time impedance and the preset winding temperature; and a regulating unit 208 for regulating the input current of the compressor in real time according to the temperature of the winding.
In the technical scheme, the real-time impedance 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, the temperature of the winding is determined according to the corresponding relation between the real-time impedance and the preset winding temperature, and the input current of the compressor is regulated and controlled, so that the temperature of the winding of the compressor is indirectly controlled, and the safety and the stability of the operation of the air conditioner are improved. Wherein, the real-time impedance of compressor winding receives the temperature influence and changes, consequently can confirm the temperature of winding through the real-time impedance of calculating the compressor winding, and then judge the running state of compressor, effectively with the temperature control of compressor winding at preset within range, realized the real-time detection to the temperature of compressor winding, improved frequency conversion control's response efficiency, and need not additionally to set up resistance collection system, reduced the hardware manufacturing cost of compressor, be favorable to promoting the market of above-mentioned compressor product.
Wherein, the real-time circulating current in the compressor winding is the alternating current, and equally, its real-time pressure drop is alternating voltage, through the real-time detection to the two, can real-time detection compressor winding's resistance, and then the temperature of real-time detection compressor winding has shortened control response time effectively, is favorable to the normal operating of compressor, and then has promoted user experience.
In addition, the heat generation quantity of the compressor directly influences the temperature of the winding of the compressor, the direct factor influencing the heat generation quantity of the compressor is current, the input current of the compressor is regulated and controlled in real time through the temperature of the winding, the temperature of the winding is further controlled, the problem that the compressor fails due to overhigh temperature of the winding of the compressor is effectively solved, the problem that liquid refrigerant in an oil pool is incompletely expelled due to overlow temperature of the winding of the compressor is effectively solved, and the stability and the safety of the operation of the compressor are improved.
In any of the above technical solutions, preferably, the determining unit 206 is further configured to: determining rated resistance value and rated temperature of the winding; the determining unit 206 is further configured to: determining the temperature of the winding according to the rated resistance value, the rated temperature, the real-time impedance and a preset formula; preset maleThe formula comprises:
where T is the temperature of the winding, T0Is the rated temperature, R, of the windingTIs the real-time impedance of the winding, R0The rated resistance value of the winding, and alpha is the temperature coefficient of resistance of the winding.
In the technical scheme, the real-time temperature can be determined through the real-time impedance, the rated resistance value, the rated temperature and the preset formula, the input current of the compressor is regulated and controlled, the temperature of the winding of the compressor is further regulated and controlled in real time, 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. The preset formula comprises:
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 addition, when the compressor is in an initial running state, the rated temperature is determined according to the ambient temperature, the rated resistance is determined according to the voltage drop and the circulating current in the initial state, an additional resistance value acquisition device is not needed, and the hardware manufacturing cost of the compressor is reduced.
In any of the above technical solutions, preferably, the operation control device 200 further includes: a judging unit 210, configured to judge whether the temperature of the winding is less than a first preset temperature; the regulation unit 208 is further configured to: when the temperature of the winding is judged to be lower than the first preset temperature, increasing the input current of the compressor; the regulation unit 208 is further configured to: and when the temperature of the winding is judged to be greater than or equal to the first preset temperature, controlling the input current of the compressor to be reduced or unchanged.
In the technical scheme, the real-time impedance of the winding of the compressor is detected in real time, the temperature of the winding is determined according to the impedance of the winding, when the temperature of the winding is lower than a first preset temperature, the temperature of the winding of the compressor is determined to be in a low-temperature state, the input current of the compressor is increased, when the temperature of the winding is higher than or equal to the first preset temperature, the temperature of the winding of the compressor is determined to be in a normal temperature or a high-temperature state, the input current of the compressor is controlled to be reduced or unchanged, the input current of the compressor is regulated and controlled in real time through the temperature of the winding, the stability and the safety of the operation of the compressor are improved, the problem that incomplete expelling of liquid refrigerants in an oil pool due to insufficient temperature of the winding.
In any of the above technical solutions, preferably, the determining unit 210 is further configured to: after the temperature of the winding is judged to be higher than the first preset temperature, judging whether the temperature of the winding is lower than or equal to a second preset temperature; the regulation unit 208 is further configured to: when the temperature of the winding is judged to be less than or equal to a second preset temperature, controlling the input current of the compressor to be unchanged; the regulation unit 208 is further configured to: and when the temperature of the winding is judged to be higher than a second preset temperature, reducing the input current of the compressor, wherein the second preset temperature is higher than the first preset temperature.
In the technical scheme, the real-time impedance of the winding of the compressor is detected in real time, the temperature of the winding is determined according to the impedance of the winding, under the condition that the temperature of the winding is judged to be greater than or equal to the first preset temperature, when the temperature of the winding is less than or equal to the second preset temperature, the temperature of the winding of the compressor is determined to be in a normal temperature state, the input current of the compressor is controlled to be unchanged, when the temperature of the winding is greater than the second preset temperature, demagnetization or fusing of the compressor can be caused, the input current of the compressor is reduced, the input current of the compressor is regulated and controlled in real time through the temperature of the winding, the stability and the safety of the operation of the compressor are improved, the problem that the compressor fails due to overhigh temperature of the winding of the compressor is effectively reduced.
In any of the above technical solutions, preferably, the determining unit 210 is further configured to: after the temperature of the winding is judged to be higher than the second preset temperature, judging whether the temperature of the winding is higher than or equal to a third preset temperature; the regulation unit 208 is further configured to: and when the temperature of the winding is judged to be greater than or equal to a third preset temperature, controlling the input current of the compressor to be reduced to zero, wherein the third preset temperature is greater than the second preset temperature.
In the technical scheme, after the temperature of the winding is judged to be higher than the second preset temperature, whether the temperature of the winding is larger than or equal to the third preset temperature or not is continuously judged, if the judgment result is yes, the fact that the temperature of the winding of the compressor is too high at the moment is determined, the compressor is in an overload running state, and the input current of the compressor is directly controlled to be reduced to zero, namely the compressor is shut down, the problem that the compressor fails due to the fact that the temperature of the winding of the compressor is too high is solved, the service life of a product is prolonged, and user experience is improved.
For example, the input current of the compressor is 50 × sin ω t, if the temperature of the winding is determined to be less than the first preset temperature, the input current of the compressor is adjusted to be increased to 100 × sin ω t, if the temperature of the winding is determined to be greater than the first preset temperature and less than or equal to the second preset temperature, the input current of the compressor is controlled to be still 50 × sin ω t, if the temperature of the winding is determined to be greater than the second preset temperature and less than or equal to the third preset temperature, the input current of the compressor is adjusted to be decreased to 25 × sin ω t, and if the temperature of the winding is determined to be greater than or equal to the third preset temperature, the input current of the compressor is adjusted to be decreased to zero.
It is worth particularly pointing out that the preset winding temperature, the first preset temperature, the second preset temperature and the third preset temperature are all determined according to the model of the compressor, and those skilled in the art can modify and adjust the preset parameters according to the operation scene of the compressor.
Fig. 3 shows a schematic block diagram of a compressor according to an embodiment of the present invention.
As shown in fig. 3, the compressor 300 according to the embodiment of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps defined in any one of the operation control methods when executing the computer program; and/or include the operation control device 200 shown in fig. 2.
The technical scheme of the invention is explained in detail by combining the attached drawings, and the invention provides an operation control method, an operation control device and a compressor. Wherein, the real-time impedance of compressor winding receives the temperature influence and changes, consequently can confirm the temperature of winding through the real-time impedance of calculating the compressor winding, and then judge the running state of compressor, effectively with the temperature control of compressor winding at preset within range, realized the real-time detection to the temperature of compressor winding, improved frequency conversion control's response efficiency, and need not additionally to set up resistance collection system, reduced the hardware manufacturing cost of compressor, be favorable to promoting the market of above-mentioned compressor product.
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 (9)
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 real-time impedance of the winding according to the real-time circulating current and the real-time voltage drop;
determining the temperature of the winding according to the corresponding relation between the real-time impedance and the preset winding temperature;
regulating and controlling the input current of the compressor in real time according to the temperature of the winding;
wherein, according to the temperature regulation and control in real time of the winding the input current of compressor specifically includes:
judging whether the temperature of the winding is lower than a first preset temperature or not;
when the temperature of the winding is judged to be lower than the first preset temperature, increasing the input current of the compressor;
and controlling the input current of the compressor to be reduced or unchanged when the temperature of the winding is judged to be greater than or equal to the first preset temperature.
2. The operation control method according to claim 1, wherein determining the temperature of the winding according to the correspondence between the real-time impedance and a preset winding temperature specifically comprises:
determining rated resistance value and rated temperature of the winding;
determining the temperature of the winding according to the rated resistance value, the rated temperature, the real-time impedance and a preset formula;
the preset formula comprises:
wherein T is the temperature of the winding, T0For rated temperature of said winding, said RTIs the real-time impedance of the winding, R0And the alpha is the resistance value of the winding, and the alpha is the temperature coefficient of resistance of the winding.
3. The operation control method according to claim 1, wherein controlling the input current of the compressor to be reduced or unchanged when it is determined that the temperature of the winding is greater than or equal to the first preset temperature specifically includes:
after the temperature of the winding is judged to be higher than the first preset temperature, judging whether the temperature of the winding is lower than or equal to a second preset temperature or not;
when the temperature of the winding is judged to be less than or equal to the second preset temperature, controlling the input current of the compressor to be unchanged;
reducing an input current of the compressor when it is determined that the temperature of the winding is greater than the second preset temperature,
wherein the second preset temperature is greater than the first preset temperature.
4. The operation control method according to claim 3, wherein reducing the input current of the compressor when it is determined that the temperature of the winding is greater than the second preset temperature specifically includes:
after the temperature of the winding is judged to be higher than the second preset temperature, judging whether the temperature of the winding is higher than or equal to a third preset temperature;
controlling the input current of the compressor to be reduced to zero when it is determined that the temperature of the winding is greater than or equal to the third preset temperature,
wherein the third preset temperature is greater than the second preset temperature.
5. 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 calculating unit is used for calculating the real-time impedance of the winding according to the real-time circulating current and the real-time voltage drop;
the determining unit is used for determining the temperature of the winding according to the corresponding relation between the real-time impedance and the preset winding temperature;
the regulating and controlling unit is used for regulating and controlling the input current of the compressor in real time according to the temperature of the winding;
the judging unit is used for judging whether the temperature of the winding is smaller than a first preset temperature or not;
the regulatory unit is further configured to: when the temperature of the winding is judged to be lower than the first preset temperature, increasing the input current of the compressor;
the regulatory unit is further configured to: and controlling the input current of the compressor to be reduced or unchanged when the temperature of the winding is judged to be greater than or equal to the first preset temperature.
6. The operation control device according to claim 5,
the determination unit is further configured to: determining rated resistance value and rated temperature of the winding;
the determination unit is further configured to: determining the temperature of the winding according to the rated resistance value, the rated temperature, the real-time impedance and a preset formula;
the preset formula comprises:
wherein T is the temperature of the winding, T0For rated temperature of said winding, said RTIs the real-time impedance of the winding, R0And the alpha is the resistance value of the winding, and the alpha is the temperature coefficient of resistance of the winding.
7. The operation control device according to claim 5,
the judging unit is further configured to: after the temperature of the winding is judged to be higher than the first preset temperature, judging whether the temperature of the winding is lower than or equal to a second preset temperature or not;
the regulatory unit is further configured to: when the temperature of the winding is judged to be less than or equal to the second preset temperature, controlling the input current of the compressor to be unchanged;
the regulatory unit is further configured to: reducing an input current of the compressor when it is determined that the temperature of the winding is greater than the second preset temperature,
wherein the second preset temperature is greater than the first preset temperature.
8. The operation control device according to claim 7,
the judging unit is further configured to: after the temperature of the winding is judged to be higher than the second preset temperature, judging whether the temperature of the winding is higher than or equal to a third preset temperature;
the regulatory unit is further configured to: controlling the input current of the compressor to be reduced to zero when it is determined that the temperature of the winding is greater than or equal to the third preset temperature,
wherein the third preset temperature is greater than the second preset temperature.
9. 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 4;
and/or comprising an operation control device according to any one of claims 5 to 8.
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| CN108931042B (en) * | 2018-06-20 | 2021-09-21 | 广东美的制冷设备有限公司 | Control method and device for heating compressor winding |
| CN109682020A (en) * | 2018-12-28 | 2019-04-26 | Tcl空调器(中山)有限公司 | A kind of compressor preheating control method, system, storage medium and air-conditioner outdoor unit |
| CN112994575B (en) * | 2019-12-17 | 2023-01-31 | 青岛海尔空调电子有限公司 | Winding temperature determination method and starting method of three-phase compressor and air conditioner |
| CN115388611A (en) * | 2022-08-22 | 2022-11-25 | 海信冰箱有限公司 | Refrigerator and compressor control method thereof |
| CN115325813B (en) * | 2022-08-22 | 2023-07-14 | 伊岛电器(宁波)有限公司 | Temperature control method and system of terrace dryer |
| CN116007146A (en) * | 2022-12-28 | 2023-04-25 | 中山长虹电器有限公司 | Control method of air conditioner |
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| JPH07180687A (en) * | 1993-12-22 | 1995-07-18 | Matsushita Electric Ind Co Ltd | Closed type motor-driven compressor |
| JP5353021B2 (en) * | 2008-02-14 | 2013-11-27 | パナソニック株式会社 | Control device for electric compressor |
| CN103471738A (en) * | 2013-09-25 | 2013-12-25 | 哈尔滨工业大学 | Method for on-line temperature monitoring of exciting winding of plasma Hall effect thruster |
| CN104848955A (en) * | 2014-02-18 | 2015-08-19 | 珠海格力电器股份有限公司 | Winding temperature test system and method |
| CN105822535B (en) * | 2016-04-19 | 2018-06-29 | 广东美的制冷设备有限公司 | Control method, device and the air conditioner of compressor |
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