CN112303820A - Overload protection detection control method, computer readable storage medium and air conditioner - Google Patents
Overload protection detection control method, computer readable storage medium and air conditioner Download PDFInfo
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- CN112303820A CN112303820A CN202010986871.0A CN202010986871A CN112303820A CN 112303820 A CN112303820 A CN 112303820A CN 202010986871 A CN202010986871 A CN 202010986871A CN 112303820 A CN112303820 A CN 112303820A
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000001514 detection method Methods 0.000 title claims abstract description 21
- 230000001012 protector Effects 0.000 claims abstract description 15
- 238000004590 computer program Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000006870 function Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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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
- F24F11/52—Indication arrangements, e.g. displays
-
- 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
-
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- 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
- F24F2140/20—Heat-exchange fluid temperature
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a detection control method of overload protection, a computer readable storage medium and an air conditioner. The detection control method for overload protection does not need to add any part or extra cost, can accurately identify whether the overload protector of the compressor acts or not, and is convenient for controlling the air conditioner to stop running in time, so that the reliability and the service life of the compressor are improved, and the product quality is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a detection control method for overload protection, a computer readable storage medium and an air conditioner.
Background
The compressor of air conditioner usually takes overload protector certainly, and overload protector generally comprises terminal, heater, contact, bimetallic strip, movable plate and shell, and its most important part is the bimetallic strip, and overload protector is the automatic jump of physical characteristic according to the bimetallic strip and closes and control the compressor and open and stop to protect the compressor, prevent that the compressor from burning out and damaging.
The air conditioner runs under severe conditions of high temperature or heavy load and the like, and the motor cannot be burnt out in short-term running because the overload protector can protect the air conditioner. However, each overload event has a certain response time, so that the compressor motor has a short overheating process before each event. The compressor motor runs under severe conditions of high temperature or heavy load for a long time, and finally the compressor motor is burnt due to frequent accumulation.
The existing fixed-frequency air conditioner is limited by cost, and parameters such as pressure, current and the like cannot be read, so that whether the overload protector of the air conditioner compressor is disconnected or not is difficult to be directly detected by a controller of the air conditioner. Therefore, whether the compressor overload protector acts or not can be accurately identified under the condition that hardware configuration is not additionally added, so that the air conditioner can be controlled to stop running in time, and the method is very critical to prolonging the service lives of the compressor and the protector.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a detection control method for overload protection, a computer readable storage medium and an air conditioner.
The purpose of the invention is realized by the following technical scheme:
in a first aspect, the present invention provides a method for detecting and controlling overload protection, including the following steps:
s1: obtaining the indoor ambient temperature T every K secondsInner ringAnd the temperature T of the inner tube of the evaporatorInner pipe；
S2: according to the indoor ambient temperature TInner ringAnd the temperature T of the inner tube of the evaporatorInner pipeObtaining the indoor environment temperature TInner ringAnd the temperature T of the inner tube of the evaporatorInner pipeThe temperature difference array of (1);
s3: acquiring the change trend of the temperature difference delta T according to the temperature difference array;
s4: according to a judgment period tInterval of timeAnd judging whether the compressor enters overload protection or not according to the difference value between the first temperature difference and the last temperature difference.
Further, the determination period tInterval of timeIs the temperature T of the inner tube of the evaporatorInner pipeAfter compressor overload protection is shut down, the temperature T of the inner tube of the evaporatorInner pipeThe time required to cool to room temperature.
Further, the step S2 is specifically:
at the judgment period tInterval of timeIn the room, the indoor ambient temperature T is recorded every K secondsInner ringAnd the temperature T of the inner tube of the evaporatorInner pipeΔ T, wherein Δ T = TInner ring-TInner pipeAt a judgment period tInterval of timeThe internal temperature difference Δ T is respectively recorded as: delta T1、△T2、△T3……△TN。
Further, the step S3 is specifically:
when the time exceeds the judgment period tInterval of timeWhen the temperature difference at the latest moment is collected and recorded as delta TN+1Using temperature difference Delta TN+1Original temperature difference delta T is replacedNDeleting the original delta T1, and reassigning the remaining N-1 temperature differences delta T, wherein the reassigning assignment formula is as follows: delta T1=△T2、△T2=△T3、△T3=△T4……△TN=△TN+1。
Further, the step S4 is based on a judgment period tInterval of timeThe difference between the first temperature difference and the last temperature difference in the interior is specifically:
calculating a judgment period tInterval of timeA first temperature difference DeltaT and a determination period TInterval of timeThe difference of the last temperature difference Δ T in the interior can sequentially obtain the following data: delta T1-△TN、△T2-△TN+1、△T3-△TN+2……△TN-△T2N-1。
Further, the step S4 of determining whether the compressor enters into the overload protection specifically includes:
the current arbitrary detection judgment period tInterval of timeInner delta T1-△TNNot less than the protective temperature difference limit value Delta TShutdownAnd judging that the overload protector of the compressor is disconnected in protection, cutting off the power supply of the compressor and the outer fan, stopping the operation of the load of the compressor and the outer fan, and recording the protection times for 1 time.
Further, the method for detecting and controlling overload protection further includes: and after the compressor enters overload protection and stops, the controller re-supplies power to the compressor and the external fan after preset appointed time X seconds, and starts the compressor.
Further, the method for detecting and controlling overload protection further includes: and in a preset time period B, if the number of times of the compressor entering overload protection exceeds a preset protection number threshold value X, displaying a fault code, and performing shutdown protection on the air conditioner.
In a second aspect, the present invention further provides a computer-readable storage medium for storing a computer program, where the computer program is invoked by a processor to implement the method for detecting and controlling overload protection according to the first aspect.
In a third aspect, the present invention further provides an air conditioner, including a processor and a memory, where the memory is used to store a computer program, and the computer program is invoked by the processor to implement the method for detecting and controlling overload protection according to the first aspect.
The invention has the beneficial effects that: the invention provides an overload protection detection control method, a computer readable storage medium and an air conditioner.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
Fig. 1 is a control logic diagram of a detection control method of overload protection according to the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
Embodiment 1, a method for controlling overload protection detection.
As shown in fig. 1, in the overload protection detection control method of this embodiment, by monitoring the trend of the difference between the ambient temperature in the air conditioner and the temperature of the evaporator inner tube, whether the compressor overload protector operates can be accurately identified, so as to control the air conditioner to stop operating in time, thereby improving the reliability and service life of the compressor, and improving the product quality.
Under normal conditions, the temperature of the inner pipe of the evaporator can be changed rapidly after the compressor is started, and the change difference is large; after the compressor is stopped, the temperature of the evaporator will rise rapidly and approach the ambient temperature range because of the rapid balance of the high and low pressures of the system. According to the experimental verification of overload relevant working conditions, whether the compressor enters overload protection or not can be judged according to the change trends of the indoor environment temperature and the temperature of the inner pipe of the evaporator.
Specifically, the overload protection function is realized by the following detection control method for overload protection:
the parameters collected by the air conditioner operation are as follows:
real-time indoor environment temperature T acquired through indoor environment temperature sensing bulbInner ring；
② real-time evaporator inner tube temperature T collected by indoor tube temperature sensing bulbInner pipe；
Determining the time required for the temperature of the inner tube of the evaporator to be reduced to the room temperature as a judgment period t according to the temperature of the inner tube after the compressor is shut down in overload protectionInterval of time；
The difference between the real-time indoor environment temperature and the evaporator inner tube temperature T ═ TInner ring－TInner pipe，△TShutdownIs a pre-given protection temperature difference limit.
The detection control method of the overload protection comprises the following specific steps:
(1) after the compressor is started and operated for a specified time length of Y seconds, namely after the compressor is powered for a specified time length of Y seconds, the controller continuously judges each judgment period tInterval of timeRecording the indoor environment temperature T every K secondsInner ringAnd the temperature T of the inner tube of the evaporatorInner pipeDelta difference in temperatureT, in a judgment period TInterval of timeThe internal temperature difference Δ T is respectively recorded as: delta T1、△T2、△T3……△TN(ii) a When the time exceeds the judgment period tInterval of timeWhen the temperature difference at the latest moment is collected and recorded as delta TN+1Using temperature difference Delta TN+1Original temperature difference delta T is replacedNAnd deleting the original delta T1, and reassigning the remaining N-1 temperature differences delta T, wherein the assignment formula is as follows: delta T1=△T2、△T2=△T3、△T3=△T4……△TN=△TN+1。
(2) Calculating each judgment period tInterval of timeInner first temperature difference DeltaT and determination period TInterval of timeThe difference of the last temperature difference Δ T in the interior can sequentially obtain the following data: delta T1-△TN、△T2-△TN+1、△T3-△TN+2……△TN-△T2N-1(ii) a And taking the data as a judgment condition, and judging whether the overload protector of the compressor acts or not according to the comparison of the difference value change amplitude and a preset protection limit value. I.e. when arbitrarily detecting the determination period tInterval of timeDelta T over time1-△TNNot less than the protective temperature difference limit value Delta TShutdownAnd judging that the overload protector of the compressor is disconnected.
Further, the method for detecting and controlling overload protection further includes: and in a preset time period B, if the number of times of the compressor entering overload protection exceeds a preset protection number threshold value X, displaying a fault code, and performing shutdown protection on the air conditioner.
(3) And after judging that the overload protector of the compressor is disconnected, the controller correspondingly sends an instruction to cut off the power supply of the compressor and the outer fan, the load of the compressor and the outer fan stops running, and simultaneously 1 protection time is recorded.
(4) And after the preset designated time length is X seconds, the controller re-supplies power to the compressor and the external fan. If the temperature difference value delta T between the detected internal environment temperature and the temperature of the evaporator inner tube is more than or equal to A ℃ (A is a preset value and is within a preset time period B)Load protection exit temperature difference limit), judging that the compressor is started, exiting the protection function, and resetting the protection times; if arbitrarily detected, determining the period tInterval of timeDelta T of reacquisition in time1-△TNNot less than the protective temperature difference limit value Delta TShutdownAnd judging that the overload protection is started again, wherein the protection times are + 1.
(5) And entering circulation, and if the number of times of the compressor entering overload protection exceeds a preset protection number threshold value X, displaying a fault code and performing shutdown protection on the air conditioner.
According to the overload protection detection control method, any part is not required to be added, extra cost is not required to be added, whether the compressor overload protector acts or not can be accurately identified only by obtaining the difference value between the ambient temperature in the air conditioner and the temperature of the inner pipe of the evaporator, so that the air conditioner can be controlled to stop running in time, the reliability and the service life of the compressor are improved, and the product quality is improved.
Embodiment 2, a computer-readable storage medium.
A computer-readable storage medium of this embodiment stores a computer program that implements a detection control method of overload protection described in embodiment 1 when the computer program is called by a processor.
Embodiment 3, an air conditioner.
An air conditioner of this embodiment includes a processor and a memory, where the memory is used to store a computer program, and when the computer program is called by the processor, the method for detecting and controlling overload protection described in embodiment 1 is implemented.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A detection control method for overload protection is characterized by comprising the following steps:
s1: obtaining the indoor ambient temperature T every K secondsInner ringAnd the temperature T of the inner tube of the evaporatorInner pipe；
S2: according to the indoor ambient temperature TInner ringAnd the temperature T of the inner tube of the evaporatorInner pipeObtaining the indoor environment temperature TInner ringAnd the temperature T of the inner tube of the evaporatorInner pipeThe temperature difference array of (1);
s3: acquiring the change trend of the temperature difference delta T according to the temperature difference array;
s4: according to a judgment period tInterval of timeAnd judging whether the compressor enters overload protection or not according to the difference value between the first temperature difference and the last temperature difference.
2. The method as claimed in claim 1, wherein the determination period t is determined by a predetermined time periodInterval of timeIs the temperature T of the inner tube of the evaporatorInner pipeAfter compressor overload protection is shut down, the temperature T of the inner tube of the evaporatorInner pipeThe time required to cool to room temperature.
3. The method for detecting and controlling overload protection according to claim 1, wherein the step S2 specifically includes:
at the judgment period tInterval of timeIn the room, the indoor ambient temperature T is recorded every K secondsInner ringAnd the temperature T of the inner tube of the evaporatorInner pipeΔ T, wherein Δ T = TInner ring-TInner pipeAt a judgment period tInterval of timeThe internal temperature difference Δ T is respectively recorded as: delta T1、△T2、△T3……△TN。
4. The method for detecting and controlling overload protection according to claim 3, wherein the step S3 specifically includes:
when the time exceeds the judgment period tInterval of timeWhen it is time toAnd collecting the temperature difference at the latest moment and recording as delta TN+1Using temperature difference Delta TN+1Original temperature difference delta T is replacedNDeleting the original delta T1, and reassigning the remaining N-1 temperature differences delta T, wherein the reassigning assignment formula is as follows: delta T1=△T2、△T2=△T3、△T3=△T4……△TN=△TN+1。
5. The method as claimed in claim 4, wherein the step S4 is based on a determination period tInterval of timeThe difference between the first temperature difference and the last temperature difference in the interior is specifically:
calculating a judgment period tInterval of timeA first temperature difference DeltaT and a determination period TInterval of timeThe difference of the last temperature difference Δ T in the interior can sequentially obtain the following data: delta T1-△TN、△T2-△TN+1、△T3-△TN+2……△TN-△T2N-1。
6. The method as claimed in claim 5, wherein the step S4 of determining whether the compressor enters overload protection specifically includes:
the current arbitrary detection judgment period tInterval of timeInner delta T1-△TNNot less than the protective temperature difference limit value Delta TShutdownAnd judging that the overload protector of the compressor is disconnected in protection, cutting off the power supply of the compressor and the outer fan, stopping the operation of the load of the compressor and the outer fan, and recording the protection times for 1 time.
7. The method for controlling detection of overload protection according to claim 1, further comprising: and after the compressor enters overload protection and stops, the controller re-supplies power to the compressor and the external fan after preset appointed time X seconds, and starts the compressor.
8. The method for controlling detection of overload protection according to claim 1, further comprising: and in a preset time period B, if the number of times of the compressor entering overload protection exceeds a preset protection number threshold value X, displaying a fault code, and performing shutdown protection on the air conditioner.
9. A computer-readable storage medium storing a computer program, characterized in that: the computer program, when invoked by a processor, implements a method of overload protection detection control as claimed in any one of claims 1 to 8.
10. An air conditioner comprising a processor and a memory for storing a computer program, characterized in that: the computer program, when invoked by the processor, implements a method of overload protection detection control as claimed in any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010986871.0A CN112303820B (en) | 2020-09-18 | 2020-09-18 | Overload protection detection control method, computer readable storage medium and air conditioner |
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| CN202010986871.0A CN112303820B (en) | 2020-09-18 | 2020-09-18 | Overload protection detection control method, computer readable storage medium and air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114043889A (en) * | 2021-11-23 | 2022-02-15 | 广州未来能源中心 | Low-power electric automobile charging and power supply terminal based on overload protection |
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| CN114043889A (en) * | 2021-11-23 | 2022-02-15 | 广州未来能源中心 | Low-power electric automobile charging and power supply terminal based on overload protection |
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| CN112303820B (en) | 2022-04-15 |
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