CN113776174A - Method and device for detecting reverse rotation of air conditioner compressor, air conditioner and storage medium - Google Patents
Method and device for detecting reverse rotation of air conditioner compressor, air conditioner and storage medium Download PDFInfo
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- CN113776174A CN113776174A CN202111111085.7A CN202111111085A CN113776174A CN 113776174 A CN113776174 A CN 113776174A CN 202111111085 A CN202111111085 A CN 202111111085A CN 113776174 A CN113776174 A CN 113776174A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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Abstract
The invention discloses a method for detecting the reverse rotation of an air conditioner compressor, which comprises the following steps of acquiring a temperature change parameter of the compressor between the middle temperature of the compressor and the oil sump temperature of the compressor when an air conditioner is in a starting state; judging whether the temperature change parameters of the compressor meet preset fault conditions or not; and if the temperature change parameter of the compressor meets the preset fault condition, determining that the compressor is in a reverse rotation state. The invention discloses a method and a device for detecting the reverse rotation of an air conditioner compressor, an air conditioner and a storage medium, which can effectively shorten the detection time of whether the compressor is in reverse rotation or not and improve the real-time performance of detection.
Description
Technical Field
The invention relates to the technical field of air conditioner control, in particular to a method and a device for detecting reverse rotation of an air conditioner compressor, an air conditioner and a storage medium.
Background
Along with the improvement of people's standard of living for the air conditioner becomes domestic electrical apparatus commonly used, because the air conditioner can carry out temperature regulation, makes current temperature more suitable through the regulated temperature, thereby can effectively improve user's experience.
In the related art, when a compressor of an air conditioner reverses, an exhaust valve plate is not opened, lubricating oil cannot be normally pumped into a cylinder, the compressor loses a compression function, a moving surface of a pump body rapidly generates heat after long-time operation, oil film coverage is insufficient, the condition that a mechanical part of the pump body is abraded due to oil shortage can be caused, in order to detect whether the compressor reverses, generally, judgment is carried out through detecting parameters such as indoor pipe temperature, indoor environment temperature and input power supply phase angle, however, more time is needed for obtaining the parameters and calculating the parameters, the detection time for detecting whether the compressor reverses is longer, and the problem of poor real-time performance detection is caused.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting the reverse rotation of an air conditioner compressor, an air conditioner and a storage medium, which can effectively shorten the detection time of whether the compressor is in reverse rotation or not and improve the real-time performance of detection.
The first aspect of the embodiments of the present invention provides a method for detecting reverse rotation of an air conditioner compressor, where the method includes:
judging whether the temperature change parameters of the compressor meet preset fault conditions or not;
and if the temperature change parameter of the compressor meets the preset fault condition, determining that the compressor is in a reverse rotation state.
Optionally, the determining whether the temperature variation parameter of the compressor meets a preset fault condition includes:
and judging whether the temperature variation parameter of the compressor is not greater than a first set threshold value.
Optionally, when the air conditioner is in a start state, the method further includes:
acquiring a target temperature change parameter of the compressor within a set time interval;
judging whether the target temperature change parameter meets a preset abnormal operation condition or not;
and if the target temperature change parameter meets the abnormal operation condition, executing the step of obtaining the compressor temperature change parameter between the middle temperature of the compressor and the oil sump temperature of the compressor.
Optionally, the obtaining a target temperature variation parameter of the compressor within a set time interval includes:
acquiring a top target temperature change parameter of the compressor in a first time interval, wherein the first set time is used as the set time interval, and the top temperature change parameter is used as the target temperature change parameter.
Optionally, the obtaining a top temperature variation parameter of the compressor in a first time interval includes:
acquiring a first top temperature of the compressor at a first moment and acquiring a second top temperature of the compressor at a second moment, wherein a time interval between the first moment and the second moment is the first time interval;
and acquiring the target top temperature change parameter according to the first top temperature and the second top temperature.
Optionally, the determining whether the target temperature change parameter meets a preset abnormal operation condition includes:
judging whether the top temperature change parameter is smaller than a first temperature preset threshold value or not, and obtaining a first judgment result;
and judging whether the target temperature change parameter meets the abnormal operation condition or not according to the first judgment result.
Optionally, the obtaining a target temperature variation parameter of the compressor within a set time interval includes:
and acquiring a discharge temperature change parameter of the compressor in a second time interval, wherein the second set time is used as the set time interval, and the discharge temperature change parameter is used as the target temperature change parameter.
Optionally, the obtaining of the discharge temperature variation parameter of the compressor in the second time interval includes:
acquiring a first exhaust temperature of the compressor at a third moment, and acquiring a second exhaust temperature of the compressor at a fourth moment, wherein a time interval between the third moment and the fourth moment is the second time interval;
and acquiring the target top temperature change parameter according to the first exhaust temperature and the second exhaust temperature.
Optionally, the determining whether the target temperature change parameter meets a preset abnormal operation condition includes:
judging whether the exhaust target temperature change parameter is smaller than a second preset temperature threshold value or not, and obtaining a second judgment result;
and judging whether the target temperature change parameter meets the abnormal operation condition or not according to the second judgment result.
Optionally, before obtaining a compressor temperature variation parameter between a middle temperature of the compressor and an oil sump temperature of the compressor, the method further includes:
acquiring a high-low pressure difference parameter when the compressor runs to the highest set frequency;
and judging whether the pressure difference parameter is smaller than the second set threshold value.
Optionally, the determining that the compressor is in a reverse rotation state includes:
if the pressure difference parameter is judged to be smaller than the second set threshold, judging whether the temperature change parameter of the compressor is not larger than a first set threshold;
and if the temperature variation parameter of the compressor is judged to be not larger than the first set threshold value, determining that the compressor is in the reverse rotation state.
Optionally, after determining that the temperature variation parameter of the compressor is not greater than the first set threshold, the method further includes:
and controlling the compressor to be in the shutdown state and/or outputting alarm information.
The invention provides a device for detecting reverse rotation of an air conditioner compressor, which comprises:
the parameter detection module is used for acquiring a compressor temperature change parameter between the middle temperature of the compressor and the oil sump temperature of the compressor when the air conditioner is in a starting state;
the condition judgment module is used for judging whether the temperature change parameters of the compressor meet preset fault conditions or not; and if the temperature change parameter of the compressor meets the preset fault condition, determining that the compressor is in a reverse rotation state.
The third aspect of the present invention provides an air conditioner, which includes an air conditioner body, a memory and a compressor arranged in the air conditioner body, and one or more programs, where one or more programs are stored in the memory and configured to be executed by one or more processors, where the one or more programs include an operation instruction corresponding to the method for detecting reverse rotation of the air conditioner compressor provided in the first aspect.
A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the steps corresponding to the method for detecting reverse rotation of an air conditioner compressor as provided in the first aspect.
The above one or at least one technical solution in the embodiments of the present application has at least the following technical effects:
based on the technical scheme, when the air conditioner is in a starting state, the temperature change parameter of the compressor between the middle temperature of the compressor and the oil sump temperature of the compressor is judged, if the temperature change parameter of the compressor meets the preset fault condition, the compressor is determined to be in a reverse rotation state, therefore, the middle temperature and the oil sump temperature of the compressor belong to the internal parameters of the air conditioner, the internal parameters of the air conditioner can be obtained in real time through a sensor, and the compressor can be determined to be in the reverse rotation state through judgment after the internal parameters of the air conditioner are obtained, compared with the prior art, the reduction range of the calculated amount is large, so that the detection time of whether the compressor is in the reverse rotation state can be effectively shortened under the condition that the internal parameters of the air conditioner can be obtained in real time and the compressor can be determined to be in the reverse rotation state through a small calculated amount, and the detection real-time performance is improved, the probability of abrasion of the compressor caused by long time of the reverse rotation state of the compressor due to long detection time is reduced.
Drawings
Fig. 1 is a schematic flowchart of a method for detecting reverse rotation of an air conditioner compressor according to an embodiment of the present disclosure;
fig. 2 is an overall step diagram of a method for detecting reverse rotation of an air conditioner compressor according to an embodiment of the present application;
fig. 3 is a block diagram of a device for detecting reverse rotation of an air conditioner compressor according to an embodiment of the present application.
Detailed Description
The main implementation principle, the specific implementation mode and the corresponding beneficial effects of the technical scheme of the embodiment of the present application are explained in detail with reference to the accompanying drawings.
Examples
Referring to fig. 1, an embodiment of the present application provides a method for detecting reverse rotation of an air conditioner compressor, where the method includes:
s101, acquiring a compressor temperature change parameter between the middle temperature of the compressor and the oil sump temperature of the compressor when the air conditioner is in a starting state;
s102, judging whether the temperature change parameters of the compressor meet preset fault conditions or not;
s103, if the temperature change parameter of the compressor meets the preset fault condition, determining that the compressor is in a reverse rotation state.
In the embodiments of the present specification, the air conditioner may be a cooling air conditioner, a heating air conditioner, a cooling and heating air conditioner, or the like.
In step S101, after the air conditioner is started, the air conditioner is in a starting state, so that the middle temperature and the oil pool temperature of the compressor can be obtained through the temperature sensor, and after the middle temperature and the oil pool temperature are obtained, the temperature variation parameter of the compressor is obtained according to the obtained middle temperature and the obtained oil pool temperature.
In particular, it relates toAnd the middle temperature of the compressor can be obtained by TMAnd the sump temperature may be expressed as TCRepresents; and determining the temperature change parameter of the compressor according to the acquired middle temperature and the acquired oil pool temperature.
Specifically, a third difference between the middle temperature and the oil sump temperature may be used as a temperature variation parameter of the compressor, and after the third difference is obtained, a product of the third difference and a corresponding third weight may also be used as a pressure difference parameter, where the third weight may be set by a human or an air conditioner, and may be set according to actual requirements, and the third weight may be, for example, 0.92, 0.95, 0.85, and the like.
For example, with the middle temperature TMThe temperature of the oil-mixing pool is TCFor example, if the third difference between the middle temperature and the oil sump temperature is used as the compressor temperature variation parameter and the compressor temperature variation parameter is Δ T3Denotes that, at this time,. DELTA.T3＝TM-TC。
After the compressor temperature variation parameter is acquired, step S102 is performed.
In step S102, it may be determined whether the temperature variation parameter of the compressor is not greater than a first set threshold, and if not, the temperature variation parameter of the compressor is not greater than the first set threshold; if the temperature change parameter of the compressor meets the preset fault condition, executing the step S103; if not, judging that the temperature variation parameter of the compressor does not meet the preset fault condition.
In the embodiment of the present specification, the first set threshold may be, for example, -3 to-10 ℃, -2 to-9 ℃, or-4 to-14 ℃. Preferably, the first set threshold is-3 to-10 ℃, and the value of the first set threshold is negative temperature, because the body moves to generate heat, the reverse air discharge valve plate cannot be opened, the oil cannot reach the inside of the cylinder through the pump to dissipate heat, and the heat is blocked and transferred to the oil pool, so that the temperature of the oil pool is higher than that of the middle part.
If it is determined through the step S102 that the compressor temperature variation parameter satisfies the preset fault condition, the step S103 is executed.
In step S103, if it is determined that the temperature variation parameter of the compressor is not greater than the first set threshold, it is determined that the compressor is in a reverse rotation state, and the compressor is controlled to be in a shutdown state. Of course, when the compressor is controlled to be in the shutdown state, alarm information can be output, the alarm information can be ringing sound or information such as 'air conditioner failure' or 'compressor reversal' or failure code and the like is transmitted to a user side through a wireless network and displayed, and the user side can be a smart phone, a tablet personal computer, a smart watch and the like.
Based on the technical scheme, when the air conditioner is in a starting state, the temperature change parameter of the compressor between the middle temperature of the compressor and the oil sump temperature of the compressor is judged, if the temperature change parameter of the compressor meets the preset fault condition, the compressor is determined to be in a reverse rotation state, therefore, the middle temperature and the oil sump temperature of the compressor belong to the internal parameters of the air conditioner, the internal parameters of the air conditioner can be obtained in real time through a sensor, and the compressor can be determined to be in the reverse rotation state through judgment after the internal parameters of the air conditioner are obtained, compared with the prior art, the reduction range of the calculated amount is large, so that the detection time of whether the compressor is in the reverse rotation state can be effectively shortened under the condition that the internal parameters of the air conditioner can be obtained in real time and the compressor can be determined to be in the reverse rotation state through a small calculated amount, and the detection real-time performance is improved, the probability of abrasion of the compressor caused by long time of the reverse rotation state of the compressor due to long detection time is reduced.
In another embodiment of the present description, when the air conditioner is in a starting state, a target temperature variation parameter of the compressor within a set time interval is further obtained; judging whether the target temperature change parameter meets a preset abnormal operation condition or not; and if the target temperature change parameter meets the abnormal operation condition, executing the step of acquiring the compressor temperature change parameter between the middle temperature of the compressor and the oil sump temperature of the compressor.
Specifically, when the air conditioner is in a starting state, a top temperature change parameter of the compressor in a first time interval can be acquired, wherein the first set time is used as a set time interval, the top temperature change parameter is used as a target temperature change parameter, whether the top temperature change parameter meets an abnormal operation condition or not is judged, and if the top temperature change parameter meets the abnormal operation condition, the step of acquiring the compressor temperature change parameter between the middle temperature of the compressor and the oil sump temperature of the compressor is executed.
In the embodiment of the present specification, the first time interval may be set manually or by an air conditioner, and may be set according to actual requirements, and a value range of the first time interval may be, for example, 3 to 5 seconds(s), 2 to 6s, 3 to 8s, and the like. Preferably, the first time interval is 3-5 s.
Specifically, a first top temperature of the compressor may be obtained at a first time, and a second top temperature of the compressor may be obtained at a second time, wherein a time interval between the first time and the second time is a first time interval; and acquiring a top temperature change parameter according to the first top temperature and the second top temperature.
In the embodiments of the present specification, the second time is generally after the first time.
Specifically, a first difference between the first top temperature and the second top temperature may be obtained as the top temperature variation parameter, and a product of the first difference and a corresponding first weight may be obtained as the top temperature variation parameter, where the first weight may be set manually or by the air conditioner, and may be set according to actual requirements, and the first weight may be, for example, 0.9, 0.98, 0.85, and the like.
For example, taking the first time interval of 4s as an example, the first top temperature of the compressor is obtained at the first time and is represented by T1, the second top temperature of the compressor is obtained at the second time and is represented by T2, the 4 th s after the first time is taken as the second time, and then the top temperature variation parameter is obtained and is represented by Δ T1Denotes that, at this time,. DELTA.T1＝T2-T1。
When the top temperature change parameter is taken as a target temperature change parameter, firstly acquiring the top temperature change parameter, and thus, after the top temperature change parameter is acquired, firstly judging whether the top temperature change parameter is smaller than a first temperature preset threshold value, and acquiring a first judgment result; judging whether the target temperature change parameter meets an abnormal operation condition or not according to the first judgment result; and if the temperature of the compressor is not satisfied, determining that the compressor is in a normal running state, and not performing any operation.
In the embodiment of the present specification, the first preset temperature threshold may be set manually or by an air conditioner, and may be set according to actual requirements, and the value range of the first preset temperature threshold may be, for example, 5 to 10 ℃, 4 to 9 ℃, 7 to 14 ℃, and the like. Preferably, the first temperature preset threshold is 5-10 ℃.
Specifically, if the first judgment result represents that the top temperature change parameter is smaller than a first temperature preset threshold value, judging that the target temperature change parameter meets an abnormal operation condition, and further executing the step of obtaining the compressor temperature change parameter between the middle temperature of the compressor and the oil sump temperature of the compressor; and if the first judgment result represents that the top temperature change parameter is not less than the first temperature preset threshold, determining that the compressor is in a normal operation state, and performing no operation.
For example, the top temperature variation parameter is Δ T1For example, if Δ T1Is 4 deg.C, and the first temperature preset threshold is 7 deg.C, since 4<7, if the first judgment result representing that the top temperature change parameter is smaller than a first temperature preset threshold value can be determined, executing the step of obtaining the compressor temperature change parameter between the middle temperature of the compressor and the oil sump temperature of the compressor; if Δ T1Is 10 deg.C, and the first temperature preset threshold is 8 deg.C, since 8 deg.C<And 10, determining that the first judgment result represents that the top temperature change parameter is not less than a first preset temperature threshold, and determining that the compressor is in a normal operation state.
In another embodiment of the present specification, the discharge temperature variation parameter of the compressor in the second time interval may also be obtained when the target temperature variation parameter of the compressor in the set time interval is reached, in which case, the second set time is used as the set time interval, and the discharge temperature variation parameter is used as the target temperature variation parameter.
In this embodiment of the present description, the second time interval may be set manually or by an air conditioner, and may be set according to actual requirements, and a value range of the second time interval may be, for example, 8 to 10 seconds(s), 7 to 12s, 9 to 14s, and the like. Preferably, the first time interval is 8-10 s.
In a specific implementation process, a first discharge temperature of the compressor can be obtained at a third moment, and a second discharge temperature of the compressor can be obtained at a fourth moment, wherein a time interval between the third moment and the fourth moment is a second time interval; and acquiring a top temperature change parameter according to the first exhaust temperature and the second exhaust temperature.
In the embodiments of the present specification, the fourth timing is generally after the third timing.
Specifically, a second difference between the first exhaust temperature and the second exhaust temperature may be obtained as the exhaust temperature variation parameter, and after the second difference is obtained, a product of the second difference and a corresponding second weight may be obtained as the exhaust temperature variation parameter, where the second weight may be set manually or by an air conditioner, and may be set according to actual requirements, and the second weight may be, for example, 0.9, 0.98, 0.85, and the like.
For example, taking the second time interval of 9s as an example, the first discharge temperature of the compressor is obtained at the third time and is represented by T3, the 9 th s after the third time is taken as the fourth time, the second discharge temperature of the compressor is obtained at the fourth time and is represented by T4, and then the discharge temperature variation parameter is obtained by Δ T2Denotes that, at this time,. DELTA.T2＝T4-T3。
After the exhaust temperature change parameter of the compressor in the second time interval is obtained, whether the exhaust temperature change parameter is smaller than a second preset temperature threshold value or not is judged, and a second judgment result is obtained; and judging whether the target temperature change parameter meets the abnormal operation condition or not according to the second judgment result. And if the temperature of the compressor is not satisfied, determining that the compressor is in a normal running state, and not performing any operation.
In the embodiment of the present specification, the second preset temperature threshold may be set manually or by an air conditioner, and may be set according to actual requirements, and the value range of the second preset temperature threshold may be, for example, 8 to 10 ℃, 6 to 9 ℃, 9 to 14 ℃, and the like. Preferably, the second preset temperature threshold is 8-10 ℃.
Specifically, if the second judgment result indicates that the exhaust temperature variation parameter is smaller than a second preset temperature threshold, judging that the target temperature variation parameter meets an abnormal operation condition, and further executing the step of obtaining the compressor temperature variation parameter between the middle temperature of the compressor and the oil sump temperature of the compressor; and if the second judgment result represents that the exhaust temperature variation parameter is not less than the second temperature preset threshold, determining that the compressor is in a normal operation state, and performing no operation.
For example, the exhaust temperature variation parameter is Δ T2For example, if Δ T2Is 6 deg.C and the second preset temperature threshold is 9 deg.C, since 6 deg.C<9, if it can be determined that the second judgment result represents that the exhaust temperature variation parameter is smaller than a second preset temperature threshold, executing the step of obtaining a compressor temperature variation parameter between the middle temperature of the compressor and the oil sump temperature of the compressor; if Δ T2Is 11 deg.C, and the second temperature preset threshold is 10 deg.C, since 10 deg.C<And 11, determining that the second judgment result represents that the exhaust temperature change parameter is not less than a second preset temperature threshold value, and determining that the compressor is in a normal operation state.
In another embodiment of the present disclosure, after the target temperature variation parameter is determined to satisfy the abnormal operation condition, before the step of obtaining the compressor temperature variation parameter between the middle temperature of the compressor and the oil sump temperature of the compressor is performed, the frequency of the compressor may be operated to the highest set frequency, and the pressure difference parameter of the high pressure and the low pressure of the compressor when the compressor is operated at the highest set frequency may be obtained.
Specifically, when acquiring the differential pressure parameter, the high pressure parameter of the compressor operating at the highest set frequency can be acquired by setting a high pressure gauge in the compressor, and the high pressure parameter can be acquired by THIndicating, and by mortgages provided in the compressorThe table obtains the low-pressure parameter T of the compressor when the compressor runs at the highest set frequencyLRepresents; and determining a pressure difference parameter according to the obtained high-pressure parameter and the low-pressure parameter.
Specifically, a fourth difference between the high pressure parameter and the low pressure parameter may be used as the pressure difference parameter, and after the fourth difference is obtained, a product of the fourth difference and a corresponding fourth weight may be used as the pressure difference parameter, where the fourth weight may be set by a human or an air conditioner, and may be set according to actual requirements, and the fourth weight may be, for example, 0.9, 0.98, 0.85, and the like.
For example, with a high pressure parameter of THAnd a low pressure parameter of TLFor example, if the fourth difference between the high pressure parameter and the low pressure parameter is taken as the differential pressure parameter and the differential pressure parameter is represented by Δ P, in this case, Δ P is TH-TL。
Specifically, if the differential pressure parameter is obtained before the temperature variation parameter of the compressor is obtained, at this time, it may be determined whether the differential pressure parameter is smaller than a second set threshold value; if the pressure difference parameter is judged to be smaller than the second set threshold, continuously judging whether the temperature change parameter of the compressor is not larger than the first set threshold; and if the pressure difference parameter is judged to be smaller than the second set threshold value and the temperature change parameter of the compressor is not larger than the first set threshold value, determining that the compressor is in a reverse rotation state and controlling the compressor to be in a stop state. At this moment, the accuracy of determining that the compressor is in the reverse rotation state can be higher through twice judgments on the pressure difference parameter and the temperature change parameter of the compressor.
Of course, it is also possible to simultaneously determine whether the pressure difference parameter is smaller than the second set threshold and determine whether the temperature variation parameter of the compressor is not greater than the first set threshold, and when it is determined that the pressure difference parameter is smaller than the second set threshold and the temperature variation parameter of the compressor is not greater than the first set threshold, determine that the compressor is in the reverse rotation state, and control the compressor to be in the shutdown state. Whether the temperature variation parameter of the compressor is not greater than the first set threshold value or not can be judged first, and then whether the pressure difference parameter is less than the second set threshold value or not can be judged, and the specification is not limited specifically.
In this embodiment, the second setting threshold may be set manually or by an air conditioner, and may be set according to actual requirements, and the second setting threshold may be, for example, 0 to 0.2Mpa, 0 to 0.4Mpa, 0.1 to 0.6Mpa, or the like. Preferably, the second set threshold is 0-0.2 Mpa.
Specifically, when the differential pressure parameter is judged to be not less than the second set threshold, it may be judged that the compressor is the reason for starting due to the imbalance of the internal pressure of the system, and at this time, the target temperature change parameter of the compressor within the set time interval may be continuously obtained; and judging whether the target temperature change parameter meets a preset abnormal operation condition. When the pressure difference parameter is judged to be smaller than the second set threshold value, the possibility that the compressor is reversed or the compressor is not started can be judged; so, need further judge whether compressor temperature variation parameter is not more than first settlement threshold, if compressor temperature variation parameter is not more than first settlement threshold, at this moment, can confirm that middle part temperature is less than oil bath temperature, has got rid of the condition that the compressor did not start, at this moment, can accurately judge that the compressor has taken place the reversal, promptly, the compressor is in the reversal state. When the compressor rotates reversely, the pump body is heated rapidly, so that the temperature of the oil pool is higher than that of the middle part of the compressor, and when the compressor does not rotate reversely, the temperature of the middle part of the compressor is the highest under the action of the motor.
In this way, by first determining whether the differential pressure parameter is not less than the second set threshold, the possibility that the compressor is reversed or the compressor is not started can be determined; and then, the condition that the compressor is not started can be eliminated by judging whether the temperature variation parameter of the compressor is not greater than the first set threshold value, so that the accuracy of judging that the compressor is in a reverse state is higher when the pressure difference parameter is judged to be smaller than the second set threshold value and the temperature variation parameter of the compressor is not greater than the first set threshold value.
Based on the technical scheme, when the air conditioner is in a starting state, if the top temperature change parameter of the compressor in a set time interval meets an abnormal operation condition, acquiring a high-low pressure differential pressure parameter when the compressor operates to the highest set frequency, and acquiring a compressor temperature change parameter between the middle temperature of the compressor and the oil sump temperature of the compressor; when the pressure difference parameter is smaller than a second set threshold value and the compressor temperature variation parameter is not larger than a first set threshold value, it is determined that the compressor is in a reverse rotation state and the compressor is controlled to be in a stop state, and thus, because the top temperature variation parameter, the pressure difference parameter and the compressor temperature variation parameter belong to the internal parameters of the air conditioner, can be obtained in real time, and after obtaining the internal parameters of the air conditioner, the compressor can be determined whether to be in the reverse rotation state through judgment, the reduction range of the calculated amount is large, so that under the condition that the internal parameters of the air conditioner can be obtained in real time and whether the compressor is in the reverse rotation state can be judged through the small calculated amount, the detection time of whether the compressor is reversely rotated can be effectively shortened, the real-time performance of detection is improved, and the probability of abrasion of the compressor caused by long time of the compressor in a reverse state due to long detection time is reduced.
Based on the technical scheme, when the air conditioner is in a starting state, if the exhaust temperature change parameter of the compressor in a set time interval meets an abnormal operation condition, acquiring the pressure difference parameter of high pressure and low pressure when the compressor operates to the highest set frequency, and acquiring the compressor temperature change parameter between the middle temperature of the compressor and the oil sump temperature of the compressor; when the pressure difference parameter is smaller than a second set threshold value and the compressor temperature variation parameter is not larger than a first set threshold value, it is determined that the compressor is in a reverse rotation state and the compressor is controlled to be in a stop state, and thus, because the exhaust temperature variation parameter, the pressure difference parameter and the compressor temperature variation parameter belong to the internal parameters of the air conditioner, can be obtained in real time, and after obtaining the internal parameters of the air conditioner, the compressor can be determined whether to be in the reverse rotation state through judgment, the reduction range of the calculated amount is large, so that under the condition that the internal parameters of the air conditioner can be obtained in real time and whether the compressor is in the reverse rotation state can be judged through the small calculated amount, the detection time of whether the compressor is reversely rotated can be effectively shortened, the real-time performance of detection is improved, and the probability of abrasion of the compressor caused by long time of the compressor in a reverse state due to long detection time is reduced.
In another embodiment of the present disclosure, if the differential pressure parameter is smaller than the second set threshold and the temperature variation parameter of the compressor is not greater than the first set threshold, it is determined that the compressor is in the reverse rotation state, and the compressor is controlled to be in the shutdown state, and an alarm message is output, where the alarm message may be, for example, a ring tone or a message such as "an air conditioner is failed" or "the compressor is reversed" that is transmitted to a user side through a wireless network and displayed, and the user side may be, for example, a smart phone, a tablet computer, a smart watch, and the like.
Referring to fig. 2, an overall step diagram of a method for detecting reverse rotation of an air conditioner compressor according to the embodiment is provided. Firstly, executing the step A1, starting the air conditioner, namely starting the air conditioner; after performing step a1, a10, a11, a12, A3, a4, a5, A6, and a7 may be performed in sequence, or a20, a21, a22, A3, a4, a5, A6, and a7 may be performed in sequence; the present specification is not particularly limited.
When the steps A10, A11, A12, A3, A4, A5, A6 and A7 are sequentially executed, firstly executing A10, detecting the initial compressor top temperature T1, running to a first time interval, and detecting the compressor top temperature T2 at the moment; step A11 is executed, and the temperature difference delta T at the top of the compressor is calculated1T2-T1, where the compressor top temperature difference is the top temperature variation parameter; then, step A12 is executed to judge the delta T1Whether the temperature is smaller than a first preset temperature threshold value or not; if not, executing A101 and judging the normal operation of the compressor; if yes, executing step A3, operating to the highest set frequency of the compressor, and detecting high and low pressure TH、TLCalculating the differential pressure Δ P ═ TH-TL(ii) a After the pressure difference is obtained, executing the step A4, and judging whether the pressure difference is smaller than a second set threshold value C; if not, returning to execute A10, A11, A12 and A3; if yes, go to step A5, detect the middle temperature TMTemperature T of the oil poolCAnd calculating the temperature variation parameter Delta T of the compressor3＝TM-TC(ii) a Then holdStep A6, determine Δ T3Whether the current value is not greater than a first set threshold value D; if yes, executing the step A7, judging reverse rotation, stopping the compressor and outputting warning information; if not, step A8 is executed, the compressor is abnormal and in a shutdown state.
And in the process of sequentially executing A20, A21, A22, A3, A4, A5, A6 and A7, firstly executing A20, detecting the initial compressor exhaust temperature T3, operating to a second time interval, and detecting the compressor exhaust temperature T4 at the moment; step A21 is executed next, and the compressor discharge temperature difference delta T is calculated2T4-T3, wherein the compressor discharge temperature difference is a discharge temperature variation parameter; then, step A22 is executed to judge the delta T2Whether the temperature is less than a second preset temperature threshold value; if not, executing A101 and judging the normal operation of the compressor; if yes, executing step A3, operating to the highest set frequency of the compressor, and detecting high and low pressure TH、TLCalculating the differential pressure Δ P ═ TH-TL(ii) a After the pressure difference is obtained, executing the step A4, and judging whether the pressure difference is smaller than a second set threshold value C; if not, returning to execute A20, A21, A22 and A3; if yes, go to step A5, detect the middle temperature TMThe temperature of the oil-mixing pool is TCAnd calculating the temperature variation parameter Delta T of the compressor3＝TM-TC(ii) a Then, step A6 is executed to determine Δ T3Whether the current value is not greater than a first set threshold value D; if yes, executing the step A7, judging reverse rotation, stopping the compressor and outputting warning information; if not, step A8 is executed, the compressor is abnormal and in a shutdown state.
Based on the technical scheme, when the air conditioner is in a starting state, if the exhaust temperature change parameter of the compressor in a set time interval meets an abnormal operation condition, acquiring the pressure difference parameter of high pressure and low pressure when the compressor operates to the highest set frequency, and acquiring the compressor temperature change parameter between the middle temperature of the compressor and the oil sump temperature of the compressor; when the pressure difference parameter is smaller than a second set threshold value and the compressor temperature variation parameter is not larger than a first set threshold value, it is determined that the compressor is in a reverse rotation state and the compressor is controlled to be in a stop state, and thus, because the exhaust temperature variation parameter, the first pressure measurement parameter and the compressor temperature variation parameter belong to the internal parameters of the air conditioner, the parameters can be obtained in real time, and after obtaining the internal parameters of the air conditioner, the compressor can be determined whether to be in the reverse rotation state through judgment, the reduction range of the calculated amount is large, so that under the condition that the internal parameters of the air conditioner can be obtained in real time and whether the compressor is in the reverse rotation state can be judged through the small calculated amount, the detection time of whether the compressor is reversely rotated can be effectively shortened, the real-time performance of detection is improved, and the probability of abrasion of the compressor caused by long time of the compressor in a reverse state due to long detection time is reduced.
In addition, based on the technical scheme, whether the compressor is in a reverse rotation state or not can be rapidly identified without distinguishing the current operation mode of the air conditioner, and the application range is wider.
A second aspect of the embodiment of the present application further provides a device for detecting reverse rotation of an air conditioner compressor, referring to fig. 3, the device includes:
the parameter detection module 301 is configured to obtain a compressor temperature change parameter between a middle temperature of the compressor and an oil sump temperature of the compressor when the air conditioner is in a start state;
a condition determining module 302, configured to determine whether the temperature variation parameter of the compressor meets a preset fault condition; and if the temperature change parameter of the compressor meets the preset fault condition, determining that the compressor is in a reverse rotation state. In an alternative embodiment, the condition determining module 302 is configured to determine whether the temperature variation parameter of the compressor is not greater than a first set threshold.
In an optional embodiment, the method further comprises:
the target temperature parameter acquisition unit is used for acquiring a target temperature change parameter of the compressor within a set time interval when the air conditioner is in a starting state;
a condition determining module 302, configured to determine whether the target temperature variation parameter meets a preset abnormal operating condition;
a parameter detecting module 301, configured to obtain a compressor temperature variation parameter between a middle temperature of the compressor and an oil sump temperature of the compressor if the target temperature variation parameter meets the abnormal operation condition.
In an alternative embodiment, the target temperature parameter obtaining unit is configured to obtain a top target temperature variation parameter of the compressor within a first time interval, where the first set time is the set time interval, and the top temperature variation parameter is the target temperature variation parameter.
In an optional embodiment, the target temperature parameter obtaining unit is configured to obtain a first top temperature of the compressor at a first time and obtain a second top temperature of the compressor at a second time, where a time interval between the first time and the second time is the first time interval; and acquiring the target top temperature change parameter according to the first top temperature and the second top temperature.
In an optional implementation manner, the condition determining module 302 is configured to determine whether the top temperature variation parameter is smaller than a first preset temperature threshold, and obtain a first determination result; and judging whether the target temperature change parameter meets the abnormal operation condition or not according to the first judgment result.
In an alternative embodiment, the target temperature parameter obtaining unit is configured to obtain a discharge temperature variation parameter of the compressor in a second time interval, where the second set time is the set time interval, and the discharge temperature variation parameter is the target temperature variation parameter.
In an optional embodiment, the target temperature parameter obtaining unit is configured to obtain a first discharge temperature of the compressor at a third time, and obtain a second discharge temperature of the compressor at a fourth time, where a time interval between the third time and the fourth time is the second time interval; and acquiring the target top temperature change parameter according to the first exhaust temperature and the second exhaust temperature.
In an optional implementation manner, the condition determining module 302 is configured to determine whether the exhaust target temperature variation parameter is smaller than a second preset temperature threshold, and obtain a second determination result; and judging whether the target temperature change parameter meets the abnormal operation condition or not according to the second judgment result.
In an optional embodiment, the method further comprises:
the pressure difference parameter acquiring unit is used for acquiring high and low pressure difference parameters when the compressor runs to the highest set frequency before acquiring a compressor temperature change parameter between the middle temperature of the compressor and the oil sump temperature of the compressor; and judging whether the pressure difference parameter is smaller than the second set threshold value.
In an optional implementation manner, the condition determining module 302 is configured to determine whether the temperature variation parameter of the compressor is not greater than a first set threshold if it is determined that the differential pressure parameter is less than the second set threshold;
the compressor control module 303 is configured to determine that the compressor is in the reverse rotation state and control the compressor to be in the shutdown state if it is determined that the temperature variation parameter of the compressor is not greater than the first set threshold.
In an optional embodiment, the method further comprises:
and the prompting module 304 is configured to output alarm information after determining that the temperature variation parameter of the compressor is not greater than the first set threshold.
The third aspect of the embodiments of the present application also provides an air conditioner, where the air conditioner includes an air conditioner body, a memory and a compressor that are disposed in the air conditioner body, and one or more programs, where one or more programs are stored in the memory, and are configured to be executed by one or more processors, where the one or more programs include an operation instruction for performing the method for detecting reverse rotation of an air conditioner compressor.
The fourth aspect of the embodiments of the present application also provides a computer readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps corresponding to the method for detecting reverse rotation of an air conditioner compressor.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is only limited by the appended claims
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (15)
1. A method for detecting reverse rotation of an air conditioner compressor is characterized by comprising the following steps:
acquiring a compressor temperature change parameter between the middle temperature of the compressor and the oil sump temperature of the compressor when the air conditioner is in a starting state;
judging whether the temperature change parameters of the compressor meet preset fault conditions or not;
and if the temperature change parameter of the compressor meets the preset fault condition, determining that the compressor is in a reverse rotation state.
2. The method as claimed in claim 1, wherein said determining whether said compressor temperature variation parameter satisfies a preset fault condition comprises:
and judging whether the temperature variation parameter of the compressor is not greater than a first set threshold value.
3. The method of claim 2, wherein in a startup state of the air conditioner, the method further comprises:
acquiring a target temperature change parameter of the compressor within a set time interval;
judging whether the target temperature change parameter meets a preset abnormal operation condition or not;
and if the target temperature change parameter meets the abnormal operation condition, executing the step of obtaining the compressor temperature change parameter between the middle temperature of the compressor and the oil sump temperature of the compressor.
4. The method as claimed in claim 3, wherein said obtaining a target temperature variation parameter of said compressor over a set time interval comprises:
acquiring a top target temperature change parameter of the compressor in a first time interval, wherein the first set time is used as the set time interval, and the top temperature change parameter is used as the target temperature change parameter.
5. The method of claim 4, wherein said obtaining a top temperature variation parameter of said compressor over a first time interval comprises:
acquiring a first top temperature of the compressor at a first moment and acquiring a second top temperature of the compressor at a second moment, wherein a time interval between the first moment and the second moment is the first time interval;
and acquiring the target top temperature change parameter according to the first top temperature and the second top temperature.
6. The method of claim 5, wherein said determining whether said target temperature change parameter satisfies a predetermined abnormal operating condition comprises:
judging whether the top temperature change parameter is smaller than a first temperature preset threshold value or not, and obtaining a first judgment result;
and judging whether the target temperature change parameter meets the abnormal operation condition or not according to the first judgment result.
7. The method as claimed in claim 3, wherein said obtaining a target temperature variation parameter of said compressor over a set time interval comprises:
and acquiring a discharge temperature change parameter of the compressor in a second time interval, wherein the second set time is used as the set time interval, and the discharge temperature change parameter is used as the target temperature change parameter.
8. The method of claim 7, wherein said obtaining a discharge temperature variation parameter of said compressor over a second time interval comprises:
acquiring a first exhaust temperature of the compressor at a third moment, and acquiring a second exhaust temperature of the compressor at a fourth moment, wherein a time interval between the third moment and the fourth moment is the second time interval;
and acquiring the target top temperature change parameter according to the first exhaust temperature and the second exhaust temperature.
9. The method of claim 8, wherein said determining whether said target temperature change parameter satisfies a predetermined abnormal operating condition comprises:
judging whether the exhaust target temperature change parameter is smaller than a second preset temperature threshold value or not, and obtaining a second judgment result;
and judging whether the target temperature change parameter meets the abnormal operation condition or not according to the second judgment result.
10. The method according to any one of claims 3-9, wherein prior to obtaining a compressor temperature variation parameter between a mid-point temperature of the compressor and an oil sump temperature of the compressor, the method further comprises:
acquiring a high-low pressure difference parameter when the compressor runs to the highest set frequency;
and judging whether the pressure difference parameter is smaller than the second set threshold value.
11. The method of claim 10, wherein said determining that the compressor is in a reverse rotation state comprises:
if the pressure difference parameter is judged to be smaller than the second set threshold, judging whether the temperature change parameter of the compressor is not larger than a first set threshold;
and if the temperature variation parameter of the compressor is judged to be not larger than the first set threshold value, determining that the compressor is in the reverse rotation state.
12. The method according to any one of claims 1 to 10, wherein after determining that the compressor temperature variation parameter is not greater than the first set threshold, the method further comprises:
and controlling the compressor to be in the shutdown state and/or outputting alarm information.
13. The utility model provides a detection device of air condition compressor reversal which characterized in that includes:
the parameter detection module is used for acquiring a compressor temperature change parameter between the middle temperature of the compressor and the oil sump temperature of the compressor when the air conditioner is in a starting state;
the condition judgment module is used for judging whether the temperature change parameters of the compressor meet preset fault conditions or not; and if the temperature change parameter of the compressor meets the preset fault condition, determining that the compressor is in a reverse rotation state.
14. An air conditioner, comprising an air conditioner body, a memory and a compressor arranged in the air conditioner body, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by one or more processors to execute the operating instructions included in the one or more programs for performing the method according to any one of claims 1 to 10.
15. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps corresponding to the method according to any one of claims 1 to 10.
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