CN105180362A - compressor overload protection control method and device and fixed-frequency air conditioner - Google Patents
compressor overload protection control method and device and fixed-frequency air conditioner Download PDFInfo
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- CN105180362A CN105180362A CN201510561334.0A CN201510561334A CN105180362A CN 105180362 A CN105180362 A CN 105180362A CN 201510561334 A CN201510561334 A CN 201510561334A CN 105180362 A CN105180362 A CN 105180362A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 5
- 238000004880 explosion Methods 0.000 abstract description 6
- 239000003507 refrigerant Substances 0.000 description 19
- 230000000694 effects Effects 0.000 description 5
- 230000035485 pulse pressure Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
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Abstract
The invention discloses a compressor overload protection control method and device and a fixed-frequency air conditioner. The overload protection control method for the compressor comprises the following steps: detecting the state of a compressor in the air conditioner to obtain a detection result; judging whether the compressor has overload protection or not according to the detection result; and if judging that the compressor has overload protection, controlling the fan of the air conditioner to stop running. The invention reduces the possibility that the overload protection of the compressor is easy to cause the pipe explosion of the system pipeline.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a compressor overload protection control method and device and a fixed-frequency air conditioner.
Background
With the development of society, the problems of energy and environment become more and more prominent, especially in the aspects of energy consumption and environmental pollution and destruction. How to take effective solutions in these aspects is also becoming increasingly important. At present, most of domestic air conditioners in China adopt R22 traditional refrigerants, R22 refrigerant is more applied to Freon refrigerant, and the refrigerant has great damage to the ozone layer, seriously harms the living environment and the whole ecological environment of human beings and is gradually eliminated. The R410A refrigerant is a refrigerant as a substitute for R22, does not destroy the ozone layer, and enables the air conditioner to have high working efficiency, but the R22 refrigerant and the R410A refrigerant have high global warming potentials (GWP for short), cause certain damage to the climate after long-term use, and belong to non-environment-friendly refrigerants. Therefore, a novel environment-friendly refrigerant with lower GWP value, such as R32 refrigerant, is developed. The R32 refrigerant not only does not destroy ozone layer, but also saves energy. However, the saturation pressure of the R32 refrigerant is about 2.5% higher than that of the R410A refrigerant, and the R32 refrigerant has a certain flammability, which poses a certain risk when the R32 refrigerant leaks out. Thus, the urgency to prevent air conditioning system leaks is much higher for the R32 refrigerant than for the R22 refrigerant and the R410A refrigerant.
Currently, air conditioners, such as fixed frequency air conditioners, do not have a feedback function for compressor overload protection. When the compressor of the air conditioner is subjected to overload protection, the main control computer of the air conditioner cannot receive overload protection information, so that the compressor of the air conditioner is frequently subjected to overload protection, the pipeline of the air conditioning system is frequently impacted by pulse pressure, and the possibility of pipe explosion of the pipeline of the system is increased. On the other hand, after the compressor stops operating, the indoor and outdoor fans still continue to operate, and particularly during heating, cold air blowing exists, so that the comfort of the air conditioner is affected.
Aiming at the problem that the overload protection of the compressor easily causes the pipe explosion of the system pipeline in the related technology, an effective solution is not provided at present.
Disclosure of Invention
The invention mainly aims to provide a compressor overload protection control method and device and a fixed-frequency air conditioner, so as to solve the problem that the overload protection of the compressor is easy to cause pipe explosion of a system pipeline.
In order to achieve the above object, according to one aspect of the present invention, there is provided a compressor overload protection control method including: detecting the state of a compressor in the air conditioner to obtain a detection result; judging whether the compressor has overload protection or not according to the detection result; and if judging that the compressor has overload protection, controlling the fan of the air conditioner to stop running.
Further, if it is determined that the compressor is overload-protected, the compressor overload-protection control method further includes: counting the times of overload protection of the compressor; judging whether the number of times of overload protection of the compressor reaches a preset number of times; and if the number of times of overload protection of the compressor is judged to reach the preset number of times, determining that the compressor fails.
Further, after determining that the compressor is out of order, the compressor overload protection control method further includes: outputting a fault signal, wherein the fault signal is used for indicating that the overload protection of the compressor is in fault; or controlling the compressor to stop running.
Further, after determining that the compressor is out of order, the compressor overload protection control method further includes: outputting prompt information, wherein the prompt information is used for prompting to clear the fault of the compressor, and the prompt information comprises any one of the following prompt information: shutdown prompt information used for prompting the execution of power-off or shutdown processing on the air conditioner; and the conversion prompt information is used for prompting the conversion of the operation mode of the air conditioner.
Further, the detecting the state of the compressor in the air conditioner includes: detecting the current of the whole air conditioner, and judging whether the compressor has overload protection according to the detection result: judging whether a first current value of the air conditioner is larger than a first preset current value or not, and judging whether a second current value of the air conditioner is smaller than a second preset current value or not, wherein the first current value of the air conditioner is the current value of the air conditioner detected at the first time, the second current value of the air conditioner is the current value of the air conditioner detected at the second time, the second time is later than the first time, the first preset current value is smaller than the second preset current value, and if the first current value of the air conditioner is larger than the first preset current value and the second current value of the air conditioner is smaller than the second preset current value, determining that overload protection occurs to the compressor.
Further, if it is determined that the compressor is overload-protected, the compressor overload-protection control method further includes: controlling an outdoor fan of the air conditioner to stop; controlling the compressor to stop; if the air conditioner is in a refrigeration mode, controlling an indoor fan of the air conditioner to be started; or if the air conditioner is in a heating mode, controlling an indoor fan of the air conditioner to stop.
Further, the air conditioner in the compressor overload protection control method is a fixed-frequency air conditioner.
In order to achieve the above object, according to another aspect of the present invention, there is provided an overload protection control apparatus for a compressor, the apparatus including: the detection unit is used for detecting the state of a compressor in the air conditioner to obtain a detection result; the first judging unit is used for judging whether the compressor has overload protection according to the detection result; and the control unit is used for controlling the fan of the air conditioner to stop running when judging that the compressor has overload protection.
Further, the compressor overload protection control device further comprises: the statistical unit is used for counting the times of overload protection of the compressor when judging that the overload protection of the compressor occurs; the second judgment unit is used for judging whether the times of overload protection of the compressor reaches preset times or not; and the determining unit is used for determining that the compressor has faults when the number of times of judging that the overload protection of the compressor reaches the preset number of times.
Further, the compressor overload protection control device further comprises: the output unit is used for outputting a fault signal after the compressor is determined to be in fault, wherein the fault signal is used for indicating that the overload protection of the compressor is in fault; alternatively, the control unit is also used for controlling the compressor to stop running.
Further, the compressor overload protection control device further comprises: the output unit is used for outputting prompt information after the compressor is determined to have a fault, wherein the prompt information is used for prompting the clearing of the fault of the compressor, and the prompt information comprises any one of the following prompt information: shutdown prompt information used for prompting the execution of power-off or shutdown processing on the air conditioner; and converting the prompt information to prompt the conversion of the operation mode of the air conditioner.
Further, the detecting unit is used for detecting the current of the whole air conditioner, the first judging unit is used for judging whether a first current value of the air conditioner is larger than a first preset current value or not and judging whether a second current value of the air conditioner is smaller than a second preset current value or not, wherein the first current value of the air conditioner is the current value of the air conditioner detected at the first time, the second current value of the air conditioner is the current value of the air conditioner detected at the second time, the second time is later than the first time, and the first preset current value is smaller than the second preset current value, and if the first current value of the air conditioner is judged to be larger than the first preset current value and the second current value of the air conditioner is smaller than the second preset current value, the compressor is determined to have overload protection.
Further, the control unit is also used for executing the following control when judging that the overload protection occurs to the compressor: controlling an outdoor fan of the air conditioner to stop; controlling the compressor to stop; if the air conditioner is in a refrigeration mode, controlling an indoor fan of the air conditioner to be started; or if the air conditioner is in a heating mode, controlling an indoor fan of the air conditioner to stop.
Further, the air conditioner of the compressor overload protection control device is a fixed-frequency air conditioner.
In order to achieve the above object, according to another aspect of the present invention, there is also provided a fixed-frequency air conditioner including any one of the compressor overload protection control devices provided by the present invention.
According to the invention, the state of the compressor in the air conditioner is detected to obtain the detection result, then whether the compressor has overload protection is judged according to the detection result, and if the compressor has overload protection is judged, the fan of the air conditioner is controlled to stop running, so that the problem that the system pipeline is easy to explode due to the overload protection of the compressor in the prior art is solved, and the effect of reducing the possibility that the system pipeline is easy to explode due to the overload protection of the compressor is achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a compressor overload protection control method according to an embodiment of the present invention;
fig. 2 is a schematic view of an overload protection control apparatus for a compressor according to a first embodiment of the present invention;
fig. 3 is a schematic view of an overload protection control apparatus for a compressor according to a second embodiment of the present invention; and
fig. 4 is a schematic view of an overload protection control apparatus for a compressor according to a third embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a flowchart of a compressor overload protection control method for controlling compressor overload protection according to an embodiment of the present invention, as shown in fig. 1, the compressor overload protection control method including the steps of:
and step S102, detecting the state of a compressor in the air conditioner to obtain a detection result.
The operation mode of the compressor in the air conditioner includes overload protection and non-overload protection. The current and the safe current on the circuit of the compressor in the air conditioner meet the preset relation, when the current on the circuit of the compressor in the air conditioner is larger than the safe current, the compressor in the air conditioner carries out overload protection, and the circuit of the compressor can adopt an automatic switch as an overload protection device, such as a fuse. And if the current on the line of the compressor in the air conditioner is not greater than the safety current, the compressor in the air conditioner normally works and is not subjected to overload protection.
And detecting the state of the compressor in the air conditioner to obtain a detection result. The detecting of the state of the compressor may include detecting a voltage or a current of the air conditioner. Preferably, the overall current of the air conditioner is detected to obtain a detection result of the overall current, including the overall current detected at the beginning of the overload protection of the compressor and the overall current detected subsequently. The working mode of the compressor can be further analyzed according to the detected result of the current of the whole compressor, namely, whether the compressor has overload protection or not is judged.
And step S104, judging whether the compressor has overload protection or not according to the detection result.
And after the state of the compressor in the air conditioner is detected and a detection result is obtained, judging whether the compressor has overload protection or not according to the detection result. Firstly, judging whether a first current value of the air conditioner is larger than a first preset current value or not, preferably, the first current value of the air conditioner is a current value of the air conditioner detected at a first time, the current value of the air conditioner detected at the first time is a current value of the air conditioner initially detected, and the first preset current value is a minimum running current after the air conditioner normally runs. And then, judging whether the second current value of the air conditioner is smaller than a second preset current value, preferably, the second current value of the air conditioner is the current value of the air conditioner detected at the second time, the current value of the air conditioner detected at the second time is the current value of the air conditioner subsequently detected by the air conditioner, and the second preset current is the current of the whole air conditioner running after the compressor is powered off.
The second time is later than the first time, i.e., the second current value is detected after the first current value. The first preset current value compared with the first current value is smaller than the second preset current value compared with the second current value. And if the first current value of the air conditioner is judged to be larger than the first preset current value and the second current value of the air conditioner is judged to be smaller than the second preset current value, determining that the compressor has overload protection.
And step S106, if judging that the compressor has overload protection, controlling the fan of the air conditioner to stop running.
And if the compressor is judged to have overload protection according to the detection result of the state of the compressor in the air conditioner, controlling the fan of the air conditioner to stop running. The method comprises the steps of firstly, controlling an outdoor fan of the air conditioner to stop, then, controlling a compressor of the air conditioner to stop, optionally, forcibly stopping the compressor by disconnecting an alternating current contactor of the air conditioner, and if the air conditioner is in a cooling mode, controlling an indoor fan of the air conditioner to start, or if the air conditioner is in a heating mode, controlling the indoor fan of the air conditioner to stop, so that after the compressor stops running, the comfort of the air conditioner is improved.
If the compressor overload protection is judged to be generated, the compressor overload protection control method can further comprise the following steps: counting the times of overload protection of the compressor; judging whether the number of times of overload protection of the compressor reaches a preset number of times, wherein the preset number is a safety value of the number of times of overload protection of the compressor allowed by the air conditioner and is a parameter for judging whether the compressor fails; and if the number of times of overload protection of the compressor is judged to reach the preset number, determining that the compressor fails.
After determining that the compressor is out of order, the compressor overload protection control method may further include: and outputting a fault signal. The fault signal can indicate that the overload protection of the compressor has a fault, which indicates that the compressor cannot work normally and needs to take certain maintenance measures; or directly controlling the compressor to stop running.
After determining that the compressor is out of order, the compressor overload protection control method may further include: and outputting prompt information. The prompt message can be used for prompting to clear the fault of the compressor, and preferably, the prompt message is a shutdown prompt message, such as: the information of 'the current work of the system is abnormal, namely the system is about to be shut down' is used for prompting the execution of power failure or shutdown processing on the air conditioner, so that the further deterioration of the working condition of the failed compressor is avoided; the reminder may also be a conversion reminder, such as: the information of the current working abnormality of the system, namely the current working abnormality of the system is to be converted into the safety mode is used for prompting the conversion of the running mode of the air conditioner, such as the conversion among a refrigeration mode, a heating mode, a dehumidification mode and an air supply mode, so that the compressor is ensured to work in the safety mode, and the frequent overload protection of the compressor is also avoided.
Preferably, the air conditioner in this embodiment is a fixed frequency air conditioner. Because the compressor of the fixed-frequency air conditioner has no overload protection feedback function, when the compressor has overload protection, the main control computer of the air conditioner cannot receive the overload protection information of the compressor, and the compressor is frequently subjected to overload protection. The number of times of overload protection of the compressor can be counted, whether the number of times of overload protection of the compressor reaches the preset number of times or not is judged, if the number of times of overload protection of the compressor reaches the preset number of times, the compressor is determined to be in fault, and then the overload protection of the compressor is indicated to be in fault through outputting a fault signal, or the compressor is controlled to stop running. In addition, prompt information can be output to clear the fault of the compressor, and the phenomenon that the system pipeline is frequently impacted by pulse pressure due to the fact that the number of times of overload protection of the compressor exceeds the safety value of the number of times of overload protection is avoided.
The compressor overload protection control method of the embodiment detects the state of the compressor in the air conditioner to obtain a detection result, then judges whether the compressor has overload protection according to the detection result, and controls the fan of the air conditioner to stop running if the compressor has overload protection, so that the effect of reducing the possibility that the overload protection of the compressor easily causes pipe explosion of a system pipeline is achieved.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
The embodiment of the present invention further provides a compressor overload protection control device, and it should be noted that the compressor overload protection control device of the embodiment may be used to execute the compressor overload protection control method of the embodiment of the present invention.
Fig. 2 is a schematic diagram of an overload protection control apparatus for a compressor according to a first embodiment of the present invention, which includes a detection unit 10, a first judgment unit 20 and a control unit 30, as shown in fig. 2.
The detecting unit 10 is used for detecting the state of the compressor in the air conditioner to obtain a detection result. The detection of the state of the compressor by the detection unit 10 may include detection of a voltage or a current of the air conditioner. Preferably, the detecting unit 10 detects the overall current of the air conditioner to obtain a detection result of the overall current, including the overall current detected at the beginning of the overload protection of the compressor and the overall current detected subsequently. The working mode of the compressor, that is, whether overload protection occurs to the compressor, can be further analyzed according to the result of the overall current detected by the detection unit 10.
And a first judging unit 20, configured to judge whether overload protection occurs to the compressor according to the detection result. After the detection unit 10 detects the state of the compressor in the air conditioner and obtains the detection result, the first judgment unit 20 judges whether the overload protection occurs to the compressor according to the detection result. Firstly, judging whether a first current value of the air conditioner is larger than a first preset current value or not, preferably, the first current value of the air conditioner is a current value of the air conditioner detected at a first time, the current value of the air conditioner detected at the first time is a current value of the air conditioner initially detected, and the first preset current value is a minimum running current after the air conditioner normally runs. And then, judging whether the second current value of the air conditioner is smaller than a second preset current value, preferably, the second current value of the air conditioner is the current value of the air conditioner detected at the second time, the current value of the air conditioner detected at the second time is the current value of the air conditioner subsequently detected by the air conditioner, and the second preset current is the current of the whole air conditioner running after the compressor is powered off.
The second time is later than the first time. The first preset current value is smaller than the second preset current value. If the first judging unit 20 judges that the first current value of the air conditioner is greater than the first preset current value and the second current value of the air conditioner is less than the second preset current value, it may be determined that the overload protection occurs to the compressor.
And the control unit 30 is used for controlling the fan of the air conditioner to stop running when judging that the compressor has overload protection.
If it is judged that the overload protection of the compressor occurs according to the result of the detection of the state of the compressor in the air conditioner by the first judgment unit 20, the control unit 30 controls the fan of the air conditioner to stop operating. The method comprises the steps of firstly, controlling an outdoor fan of the air conditioner to stop, then controlling a compressor of the air conditioner to stop, optionally, forcibly stopping the compressor by disconnecting an alternating current contactor of the air conditioner, and controlling an indoor fan of the air conditioner to start if the air conditioner is in a cooling mode, or controlling the indoor fan of the air conditioner to stop if the air conditioner is in a heating mode, so that the problem of cold air blowing during heating is avoided, and the use comfort of the air conditioner is not influenced.
After determining that the compressor is out of order, the compressor overload protection control device outputs a failure signal. The fault signal can indicate that the overload protection of the compressor has a fault, which indicates that the compressor cannot work normally and needs to take certain maintenance measures; or directly controlling the compressor to stop running.
After the compressor is determined to be in fault, the compressor overload protection control device outputs prompt information. The prompt message can be used for prompting to clear the fault of the compressor, and preferably, the prompt message is a shutdown prompt message, such as: the information of 'the current work of the system is abnormal, namely the system is about to be shut down' is used for prompting the execution of power failure or shutdown processing on the air conditioner, so that the further deterioration of the working condition of the failed compressor is avoided; the reminder may also be a conversion reminder, such as: the information of 'the current work of the system is abnormal, namely the system is about to be converted into the safe mode' is used for prompting the conversion of the running mode of the air conditioner, so that the compressor is ensured to work in the safe mode, and the frequent overload protection of the compressor is also avoided.
The compressor overload protection control device of the embodiment detects the state of the compressor in the air conditioner through the detection unit 10 to obtain a detection result, then judges whether the compressor has overload protection according to the detection result through the first judgment unit 20, and controls the fan of the air conditioner to stop running when judging that the compressor has overload protection, thereby avoiding the impact of pulse pressure on the system pipeline caused by frequent occurrence of overload protection of the compressor, and achieving the effect of reducing the possibility that the overload protection of the compressor easily causes the pipe burst of the system pipeline.
Fig. 3 is a schematic view of an overload protection control apparatus for a compressor according to a second embodiment of the present invention. In one embodiment of the present invention, the compressor overload protection control apparatus includes a counting unit 40, a second judging unit 50, and a determining unit 60. As shown in fig. 3, the apparatus includes a detection unit 10, a first judgment unit 20 and a control unit 30, and further includes a statistic unit 40, a second judgment unit 50 and a determination unit 60.
And the counting unit 40 is used for counting the times of overload protection of the compressor when judging that the overload protection of the compressor occurs.
And a second judging unit 50 for judging whether the number of times of the overload protection of the compressor reaches a preset number of times.
And a determining unit 60 for determining that the compressor has a fault when it is judged that the number of times of the overload protection of the compressor reaches a preset number of times.
If the first judging unit 20 judges that the compressor has overload protection, the counting unit 40 counts the number of times of the overload protection of the compressor, and the second judging unit 50 judges whether the number of times of the overload protection of the compressor reaches a preset number of times, wherein the preset number is a safety value of the number of times of the overload protection of the compressor allowed by the air conditioner, and is a parameter for judging whether the compressor has a fault, and if the second judging unit 50 judges that the number of times of the overload protection of the compressor reaches the preset number of times, the determining unit 60 determines that the compressor has a fault.
Fig. 4 is a schematic view of an overload protection control apparatus for a compressor according to a third embodiment of the present invention. In one embodiment of the present invention, the compressor overload protection control apparatus includes an output unit 70. As shown in fig. 4, the apparatus includes a detection unit 10, a first judgment unit 20, a control unit 30, a statistic unit 40, a second judgment unit 50, a determination unit 60, and an output unit 70.
The output unit 70 is used for outputting a fault signal after the determining unit 60 determines that the compressor has a fault, wherein the fault signal output by the output unit 70 is used for indicating that the overload protection of the compressor has a fault, which indicates that the compressor cannot work normally and a certain maintenance measure needs to be taken; alternatively, the control unit 30 is also used to control the compressor to stop operating.
The output unit 70 may be further configured to output a prompt message after the determining unit 60 determines that the compressor has a fault, where the prompt message output by the output unit 70 is used to prompt clearing of the fault of the compressor, and the prompt message may include a shutdown prompt message used to prompt to perform power-off or shutdown processing on the air conditioner, such as: the information of 'the current work of the system is abnormal, namely the shutdown is about to be carried out', so that the further deterioration of the working condition of the compressor with the fault is avoided; the prompt message may also be a switching prompt message for prompting switching of the operation mode of the air conditioner, such as: the information of the current work abnormality of the system, namely the system is to be converted into the safe mode, so that the compressor is ensured to work in the safe mode, and the frequent overload protection of the compressor is avoided.
In an embodiment of the present invention, the detecting unit 10 is configured to detect a total machine current of the air conditioner, and the first determining unit 20 is configured to determine whether a first current value of the air conditioner is greater than a first preset current value, and determine whether a second current value of the air conditioner is smaller than a second preset current value, where the first current value of the air conditioner is a current value of the air conditioner detected at a first time, the second current value of the air conditioner is a current value of the air conditioner detected at a second time, the second time is later than the first time, and the first preset current value is smaller than the second preset current value, and if it is determined that the first current value of the air conditioner is greater than the first preset current value and the second current value of the air conditioner is smaller than the second preset current value, it is determined that the compressor has overload protection.
In one embodiment of the present invention, the control unit 30 is further configured to control the outdoor fan of the air conditioner to be stopped first and then control the compressor to be stopped when it is determined that the compressor is overload-protected. If the air conditioner is in a cooling mode, an indoor fan of the air conditioner is controlled to be started, or if the air conditioner is in a heating mode, the indoor fan of the air conditioner is controlled to be stopped, so that after the compressor stops running, the comfort of the air conditioner is improved.
Preferably, the air conditioner in this embodiment is a fixed frequency air conditioner. The compressor of the fixed-frequency air conditioner has no overload protection feedback function, and when the compressor has overload protection, the main control computer of the air conditioner cannot receive the overload protection information of the compressor, so that the compressor is frequently subjected to overload protection. The number of times of overload protection of the compressor can be counted, whether the number of times of overload protection of the compressor reaches the preset number of times is judged, if the number of times of overload protection of the compressor reaches the preset number of times is judged, the compressor is determined to be out of order, and then the overload protection of the compressor is indicated to be out of order through outputting a fault signal, or the compressor is controlled to stop running. In addition, prompt information can be output to clear the fault of the compressor, so that the phenomenon that the system pipeline is frequently impacted by pulse pressure due to the fact that the number of times of overload protection of the compressor exceeds the safety value of the number of times of overload protection is avoided, and the effect of reducing the possibility that the system pipeline is easily burst due to the fact that the overload protection of the compressor occurs is achieved.
The embodiment of the invention also provides a fixed-frequency air conditioner, and it should be noted that the fixed-frequency air conditioner of the embodiment can be used for executing the compressor overload protection control method and device of the embodiment of the invention.
According to the embodiment of the invention, the compressor overload protection control can be formulated through the compressor overload protection control method on the premise of not increasing extra cost, so that the danger that the system pipeline is subjected to pipe explosion due to the fact that the system pipeline is frequently impacted by pulse pressure due to the frequent start and stop of the compressor of an air conditioner, especially a fixed-frequency air conditioner, is avoided, the problem that an indoor fan and an outdoor fan continue to operate after the compressor stops operating, especially the problem of cold air blowing exists under the heating condition is also avoided, and the use comfort of the air conditioner is improved. It should be noted that, the present invention achieves the effect of reducing the possibility that the overload protection of the compressor is easy to cause the pipe burst of the system pipeline.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and they may alternatively be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, or fabricated separately as individual integrated circuit modules, or fabricated as a single integrated circuit module from multiple modules or steps. Thus, the present invention is not limited to any specific combination of hardware and software.
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 (15)
1. An overload protection control method for a compressor is characterized by comprising the following steps:
detecting the state of a compressor in the air conditioner to obtain a detection result;
judging whether the compressor has overload protection or not according to the detection result; and
and if the compressor is judged to have overload protection, controlling the fan of the air conditioner to stop running.
2. The compressor overload protection control method according to claim 1, wherein if it is determined that overload protection is generated in the compressor, the compressor overload protection control method further comprises:
counting the number of times of overload protection of the compressor;
judging whether the number of times of overload protection of the compressor reaches a preset number of times; and
and if the number of times of overload protection of the compressor is judged to reach the preset number of times, determining that the compressor fails.
3. The compressor overload protection control method according to claim 2, wherein after determining that the compressor is out of order, the compressor overload protection control method further comprises:
outputting a fault signal, wherein the fault signal is indicative of a fault in overload protection of the compressor; or,
and controlling the compressor to stop running.
4. The compressor overload protection control method according to claim 2, wherein after determining that the compressor is out of order, the compressor overload protection control method further comprises:
outputting prompt information, wherein the prompt information is used for prompting to clear the fault of the compressor, and the prompt information comprises any one of the following prompt information:
shutdown prompt information for prompting the execution of power-off or shutdown processing on the air conditioner; and
and converting prompt information for prompting the conversion of the operation mode of the air conditioner.
5. The compressor overload protection control method according to claim 1,
the detecting the state of the compressor in the air conditioner includes: the current of the whole air conditioner is detected,
judging whether the compressor has overload protection according to the detection result: judging whether a first current value of the air conditioner is larger than a first preset current value or not, and judging whether a second current value of the air conditioner is smaller than a second preset current value or not, wherein the first current value of the air conditioner is the current value of the air conditioner detected at a first time, the second current value of the air conditioner is the current value of the air conditioner detected at a second time, the second time is later than the first time, and the first preset current value is smaller than the second preset current value,
and if the first current value of the air conditioner is judged to be larger than the first preset current value and the second current value of the air conditioner is judged to be smaller than the second preset current value, determining that the compressor has overload protection.
6. The compressor overload protection control method according to claim 1, wherein if it is determined that overload protection is generated in the compressor, the compressor overload protection control method further comprises:
controlling an outdoor fan of the air conditioner to stop;
controlling the compressor to stop;
if the air conditioner is in a refrigeration mode, controlling an indoor fan of the air conditioner to be started; or
And if the air conditioner is in a heating mode, controlling an indoor fan of the air conditioner to stop.
7. The compressor overload protection control method according to claim 1, wherein the air conditioner is a fixed frequency air conditioner.
8. An overload protection control device for a compressor, comprising:
the detection unit is used for detecting the state of a compressor in the air conditioner to obtain a detection result;
the first judgment unit is used for judging whether the compressor has overload protection according to the detection result; and
and the control unit is used for controlling the fan of the air conditioner to stop running when judging that the compressor has overload protection.
9. The compressor overload protection control apparatus according to claim 8, further comprising:
the counting unit is used for counting the times of overload protection of the compressor when judging that the overload protection of the compressor occurs;
the second judgment unit is used for judging whether the number of times of overload protection of the compressor reaches a preset number of times; and
and the determining unit is used for determining that the compressor fails when the number of times of overload protection of the compressor is judged to reach the preset number of times.
10. The overload protection control apparatus for a compressor according to claim 9,
the compressor overload protection control device further comprises: an output unit for outputting a fault signal after determining that the compressor is in fault, wherein the fault signal is used for indicating that the overload protection of the compressor is in fault; or,
the control unit is also used for controlling the compressor to stop running.
11. The compressor overload protection control apparatus according to claim 9, further comprising:
the output unit is used for outputting prompt information after the compressor is determined to have a fault, wherein the prompt information is used for prompting the clearing of the fault of the compressor, and the prompt information comprises any one of the following prompt information: shutdown prompt information for prompting the execution of power-off or shutdown processing on the air conditioner; and converting prompt information for prompting the conversion of the operation mode of the air conditioner.
12. The overload protection control apparatus for a compressor according to claim 8,
the detection unit is used for detecting the current of the whole air conditioner,
the first judging unit is used for judging whether a first current value of the air conditioner is larger than a first preset current value or not and judging whether a second current value of the air conditioner is smaller than a second preset current value or not, wherein the first current value of the air conditioner is a current value of the air conditioner detected at a first time, the second current value of the air conditioner is a current value of the air conditioner detected at a second time, the second time is later than the first time, the first preset current value is smaller than the second preset current value, and if the first current value of the air conditioner is judged to be larger than the first preset current value and the second current value of the air conditioner is smaller than the second preset current value, the compressor is determined to have overload protection.
13. The overload protection control apparatus for a compressor according to claim 8, wherein the control unit is further configured to perform the following control when it is determined that overload protection is applied to the compressor:
controlling an outdoor fan of the air conditioner to stop;
controlling the compressor to stop;
if the air conditioner is in a refrigeration mode, controlling an indoor fan of the air conditioner to be started; or
And if the air conditioner is in a heating mode, controlling an indoor fan of the air conditioner to stop.
14. The compressor overload protection control apparatus of claim 8, wherein the air conditioner is a fixed frequency air conditioner.
15. A constant frequency air conditioner, characterized by comprising the compressor overload protection control apparatus according to any one of claims 8 to 14.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105757908A (en) * | 2016-04-08 | 2016-07-13 | 广东美的制冷设备有限公司 | Air conditioner control method and device |
| CN106123211A (en) * | 2016-06-22 | 2016-11-16 | 广东美的制冷设备有限公司 | In air-conditioner and air-conditioner, the low-voltage variation of compressor controls apparatus and method |
| CN106196494A (en) * | 2016-08-01 | 2016-12-07 | 珠海格力电器股份有限公司 | Complete machine overload control method and device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0140062B1 (en) * | 1993-05-21 | 1998-07-01 | 김광호 | Overload control method of air conditioner |
| CN1888690A (en) * | 2005-06-28 | 2007-01-03 | 乐金电子(天津)电器有限公司 | Outdoor fan controlling method for air conditioner under overloading state |
| CN101893310A (en) * | 2010-08-31 | 2010-11-24 | 四川长虹空调有限公司 | Control method for preventing overload of compressor under heating mode of heat pump air conditioner |
| CN202868923U (en) * | 2012-11-07 | 2013-04-10 | 珠海格力电器股份有限公司 | Air conditioner |
| CN104566772A (en) * | 2013-10-24 | 2015-04-29 | 广州南洋理工职业学院 | Air conditioner refrigeration overload protection method |
| CN104564638A (en) * | 2013-10-24 | 2015-04-29 | 珠海格力电器股份有限公司 | Compressor overload protection control method and device |
-
2015
- 2015-09-02 CN CN201510561334.0A patent/CN105180362B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0140062B1 (en) * | 1993-05-21 | 1998-07-01 | 김광호 | Overload control method of air conditioner |
| CN1888690A (en) * | 2005-06-28 | 2007-01-03 | 乐金电子(天津)电器有限公司 | Outdoor fan controlling method for air conditioner under overloading state |
| CN101893310A (en) * | 2010-08-31 | 2010-11-24 | 四川长虹空调有限公司 | Control method for preventing overload of compressor under heating mode of heat pump air conditioner |
| CN202868923U (en) * | 2012-11-07 | 2013-04-10 | 珠海格力电器股份有限公司 | Air conditioner |
| CN104566772A (en) * | 2013-10-24 | 2015-04-29 | 广州南洋理工职业学院 | Air conditioner refrigeration overload protection method |
| CN104564638A (en) * | 2013-10-24 | 2015-04-29 | 珠海格力电器股份有限公司 | Compressor overload protection control method and device |
Cited By (16)
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|---|---|---|---|---|
| CN105757908A (en) * | 2016-04-08 | 2016-07-13 | 广东美的制冷设备有限公司 | Air conditioner control method and device |
| CN105757908B (en) * | 2016-04-08 | 2018-09-04 | 广东美的制冷设备有限公司 | Air-conditioner control method and device |
| CN106123211A (en) * | 2016-06-22 | 2016-11-16 | 广东美的制冷设备有限公司 | In air-conditioner and air-conditioner, the low-voltage variation of compressor controls apparatus and method |
| CN106196494A (en) * | 2016-08-01 | 2016-12-07 | 珠海格力电器股份有限公司 | Complete machine overload control method and device |
| CN106196494B (en) * | 2016-08-01 | 2018-11-09 | 珠海格力电器股份有限公司 | Complete machine overload control method and device |
| CN106246525B (en) * | 2016-08-31 | 2019-02-01 | 珠海格力电器股份有限公司 | Compressor operation control method and device |
| CN106642519A (en) * | 2016-09-20 | 2017-05-10 | 青岛海尔空调器有限总公司 | Constant-frequency air conditioner stopping control method and device |
| WO2019015137A1 (en) * | 2017-07-21 | 2019-01-24 | 广东美的暖通设备有限公司 | Control method and control device of air conditioner and air conditioner |
| CN109405175A (en) * | 2018-10-22 | 2019-03-01 | 珠海格力电器股份有限公司 | Fault clearing method and device, storage medium, equipment unit and terminal |
| CN109442674A (en) * | 2018-11-01 | 2019-03-08 | Tcl空调器(中山)有限公司 | Compressor of air conditioner guard method, unit, storage medium and air conditioner |
| CN109442674B (en) * | 2018-11-01 | 2020-11-13 | Tcl空调器(中山)有限公司 | Air conditioner compressor protection method, equipment, device, storage medium and air conditioner |
| CN109489205A (en) * | 2018-11-16 | 2019-03-19 | 广东美的制冷设备有限公司 | Air-conditioning and its compressor stop jumping prediction technique and device |
| CN109489205B (en) * | 2018-11-16 | 2020-08-25 | 广东美的制冷设备有限公司 | Air conditioner and compressor jump-stop prediction method and device thereof |
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