CN105066370A - Compressor overload protection control method and device and air conditioner - Google Patents
Compressor overload protection control method and device and air conditioner Download PDFInfo
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- CN105066370A CN105066370A CN201510557778.7A CN201510557778A CN105066370A CN 105066370 A CN105066370 A CN 105066370A CN 201510557778 A CN201510557778 A CN 201510557778A CN 105066370 A CN105066370 A CN 105066370A
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
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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
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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
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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
- F24F2110/00—Control inputs relating to air properties
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Mathematical Physics (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a compressor overload protection control method and device and an air conditioner. The compressor overload protection control method comprises the steps that the indoor temperature of the environment where the air conditioner is located and the inner pipe temperature of a compressor of the air conditioner are detected; the temperature difference of the indoor temperature and the inner pipe temperature is calculated, and a first temperature difference is obtained; the difference value of the first temperature difference and a preset temperature difference is calculated, and a second temperature difference is obtained, wherein the preset temperature difference is the temperature difference of the indoor temperature and the inner pipe temperature at the default time; whether overload protection happens to the compressor or not is judged according to the second temperature difference; if the overload protection is judged to happen to the compressor, the compressor is controlled to stop running. According to the compressor overload protection control method and device and the air conditioner, the possibility of pipe burst of a system pipeline caused by occurrence of overload protection on the compressor is reduced.
Description
Technical field
The present invention relates to field of air conditioning, in particular to a kind of overload of compressor protecting control method and apparatus and air-conditioner.
Background technology
At society, the problem of the energy and environment more and more causes the attention of people, especially in the consumption of the energy and the pollution of environment and destruction.More a kind of cold-producing medium applied in chlorofluoromethane refrigerant by R22 cold-producing medium, and because it is very large to depletion of the ozone layer, the living environment of the serious harm mankind and overall ecological environment, will eliminate gradually.R410A cold-producing medium is a kind of cold-producing medium as R22 substitute, do not damage the ozone layer, make air-conditioning work efficiency high, but the global warming potential (GlobalWarmingPotentials of R22 cold-producing medium, R410A cold-producing medium, referred to as GWP) higher, belong to the cold-producing medium of non-environmental protection.Therefore, the novel environment-friendly refrigerant that exploitation GWP value is lower, such as develops R32 cold-producing medium.R32 cold-producing medium does not only damage the ozone layer, and good energy-conserving effect.But the saturation pressure of R32 cold-producing medium exceeds about 2.5% than R410A cold-producing medium, and R32 cold-producing medium has certain combustibility, when R32 cold-producing medium spills because air-conditioning system pipeline booster splits, can cause certain danger.Thus, for R32 cold-producing medium, preventing air-conditioning system pipeline booster from splitting the urgency of leakage will far away higher than R22 cold-producing medium and R410A cold-producing medium.
At present, air-conditioner, such as, air-conditioner with fixed frequency does not have overload of compressor to protect feedback function.When the compressor generation overload protection of air-conditioner; the main control computer of air-conditioner can not receive the overload protection information of compressor; the high frequent of air-conditioner can be made like this to carry out overload protection; cause air-conditioning system pipeline to be subject to the impact of pulse continually, add the possibility of system pipeline booster.On the other hand, after compressor is out of service, and indoor fan and outdoor fan still remain in operation, and when special air-conditioner is in heating mode, air-conditioner exists the situation of blowing a cold wind over, and then have impact on the comfortableness of air-conditioner use.
For in correlation technique due to the problem of compressor generation overload protection easy initiating system pipeline booster, at present effective solution is not yet proposed.
Summary of the invention
Main purpose of the present invention is to provide a kind of overload of compressor protecting control method and apparatus and air-conditioner, at least to solve the problem due to compressor generation overload protection easy initiating system pipeline booster in correlation technique.
To achieve these goals, according to an aspect of the present invention, provide a kind of overload of compressor protecting control method, the method comprises: the interior pipe temperature detecting the indoor temperature of environment and the compressor of air-conditioner residing for air-conditioner; Calculate the temperature difference of indoor temperature and interior pipe temperature, obtain first temperature difference; Calculate the difference of first temperature difference and the default temperature difference, obtain second temperature difference, wherein, the default temperature difference is the temperature difference in predetermined time indoor temperature and interior pipe temperature; Judge whether compressor occurs overload protection according to second temperature difference; If when judging that overload protection appears in compressor, control compressor out of service.
Further, second temperature difference calculated in multiple time period, judged whether compressor occurs that overload protection comprises second temperature difference judged when the first preset time period and whether meets first pre-conditioned according to second temperature difference; If it is first pre-conditioned to judge that second temperature difference when the first preset time period meets, it is second pre-conditioned and judge that whether satisfied second temperature difference when the 3rd preset time period is the 3rd pre-conditioned whether second temperature difference judging when the second preset time period meets; Meet the 3rd pre-conditioned if second temperature difference judging when the second preset time period meets second pre-conditioned and second temperature difference when the 3rd preset time period, determine that overload protection appears in compressor.
Further, after determining that overload protection appears in compressor, the method also comprises: the number of times of overload protection appears in statistics compressor; Judge that compressor occurs whether the number of times of overload protection reaches preset times; If judge that compressor occurs that the number of times of overload protection reaches preset times, export fault-signal, wherein, fault-signal is used to indicate compressor and breaks down.
Further, fault-signal can be removed by performing any one operation following to air-conditioner: power-off, shutdown or conversion operation pattern.
Further, if judge that overload protection appears in compressor, after control compressor is out of service, the method also comprises: the operational mode detecting air-conditioner; The outdoor fan controlling air-conditioner is shut down, and when detecting that air-conditioner is in refrigeration mode, control the indoor fan start of air-conditioner, when detecting that air-conditioner is in heating mode, the indoor fan controlling air-conditioner is shut down.
To achieve these goals, according to a further aspect in the invention, additionally provide a kind of overload of compressor protecting control device, this device comprises: detecting unit, for pipe temperature in the compressor of the indoor temperature and air-conditioner that detect environment residing for air-conditioner; First computing unit, for calculating the temperature difference of indoor temperature and interior pipe temperature, obtains first temperature difference; Second computing unit, for calculating the difference of first temperature difference and the default temperature difference, obtains second temperature difference, and wherein, the default temperature difference is the temperature difference in predetermined time indoor temperature and interior pipe temperature; According to second temperature difference, first judging unit, for judging whether compressor occurs overload protection; Control unit, for when judging that overload protection appears in compressor, controls compressor out of service.
Further, second temperature difference calculates within multiple time period, and the first judging unit of this device comprises: the first judge module, and it is first pre-conditioned whether second temperature difference for judging when the first preset time period meets; Second judge module, meet first pre-conditioned for second temperature difference when judging every the first preset time period, it is second pre-conditioned and judge that whether satisfied second temperature difference when the 3rd preset time period is the 3rd pre-conditioned whether second temperature difference judging when the second preset time period meets; Determination module, meets second pre-conditioned and second temperature difference when the 3rd preset time period for second temperature difference when judging every the second preset time period and meets the 3rd pre-conditioned, determine that overload protection appears in compressor.
Further, this device also comprises: statistic unit, occurs the number of times of overload protection for adding up compressor; Second judging unit, for judging that compressor occurs whether the number of times of overload protection reaches preset times; Output unit, for judging that compressor occurs that the number of times of overload protection reaches preset times, export fault-signal, wherein, fault-signal is being used to indicate compressor and is breaking down.
Further, this device also comprises: lifting unit, for removing fault-signal by performing any one operation following to air-conditioner: power-off, shutdown or conversion operation pattern.
Further; this device also comprises: detecting unit; for detecting the operational mode of air-conditioner; wherein; control unit is shut down for the outdoor fan controlling air-conditioner, when detecting that air-conditioner is in refrigeration mode, controls the indoor fan start of air-conditioner; when detecting that air-conditioner is in heating mode, the indoor fan controlling air-conditioner is shut down.
To achieve these goals, according to another aspect of the present invention, additionally provide a kind of air-conditioner, this air-conditioner comprises overload of compressor protecting control device of the present invention.
By the present invention, adopt the interior pipe temperature detecting the indoor temperature of environment and the compressor of air-conditioner residing for air-conditioner; Then the temperature difference of pipe temperature computation indoor temperature and interior pipe temperature in the indoor temperature of environment and the compressor of air-conditioner residing for air-conditioner, obtain first temperature difference, second temperature difference can calculate within multiple time period; Calculate the difference of first temperature difference and the default temperature difference again, obtain second temperature difference, wherein, the default temperature difference is the temperature difference in predetermined time indoor temperature and interior pipe temperature; Finally judge whether compressor occurs overload protection according to second temperature difference, if when judging that overload protection appears in compressor, control compressor out of service, achieve overload of compressor protection feedback function.Solve the problem due to compressor generation overload protection easy initiating system pipeline booster, and then reduce the possibility of compressor generation overload protection easy initiating system pipeline booster.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of overload of compressor protecting control method according to a first embodiment of the present invention;
Fig. 2 is the flow chart of overload of compressor protecting control method according to a second embodiment of the present invention;
Fig. 3 is the schematic diagram of overload of compressor protecting control device according to a first embodiment of the present invention;
Fig. 4 is the schematic diagram of overload of compressor protecting control device according to a second embodiment of the present invention; And
Fig. 5 is the schematic diagram of overload of compressor protecting control device according to a third embodiment of the present invention.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The application's scheme is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only the embodiment of the application's part, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the application's protection.
It should be noted that, term " first ", " second " etc. in the description of the application and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged, in the appropriate case so that the embodiment of the application described herein.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
The invention provides a kind of overload of compressor protecting control method.
Fig. 1 is the flow chart of overload of compressor protecting control method according to a first embodiment of the present invention, and the method is used for controlling overload of compressor protection.As shown in Figure 1, this overload of compressor protecting control method comprises the following steps:
Step S102, detects the interior pipe temperature of the indoor temperature of environment and the compressor of air-conditioner residing for air-conditioner.
After the compressor operating of air-conditioner, detect the interior pipe temperature of the indoor temperature of environment and the compressor of air-conditioner residing for air-conditioner respectively.Alternatively, detect the interior pipe temperature of the indoor temperature of environment and the compressor of air-conditioner residing for air-conditioner respectively continuously, the interior pipe temperature of the indoor temperature of environment residing for air-conditioner and the compressor of air-conditioner does not have relation one to one in the same time.Preferably, after compression start runs, when preset time period, pipe temperature in the indoor temperature of environment residing for the air-conditioner detected and the compressor of air-conditioner is sampled, such as, preset time period is 1 minute, or 30 seconds, or 2 minutes, then every 1 minute, or 30 seconds, or 2 minutes indoor temperatures to environment residing for air-conditioner and corresponding with the indoor temperature of environment residing for air-conditioner in pipe temperature sample, obtain every 1 minute time, or when 30 seconds, or when 2 minutes environment residing for air-conditioner indoor temperature and corresponding with the indoor temperature of environment residing for air-conditioner in pipe temperature.
Step S104, calculates the temperature difference of indoor temperature and interior pipe temperature, obtains first temperature difference.
In the indoor temperature of environment and the compressor of air-conditioner residing for detection air-conditioner after pipe temperature, acquisition indoor temperature and corresponding with indoor temperature in pipe temperature.Calculate the temperature difference of indoor temperature and interior pipe temperature, also, calculating indoor temperature and corresponding with indoor temperature in the temperature difference of pipe temperature, obtain first temperature difference.Preferably, after compressor start runs, when preset time period, calculate indoor temperature and corresponding with indoor temperature in the temperature difference of pipe temperature, obtain first temperature difference when preset time period, such as, preset time period is 1 minute, or 30 seconds, or 2 minutes, then every 1 minute, or 30 seconds, or within 2 minutes, calculate indoor temperatures and corresponding with indoor temperature in the temperature difference of pipe temperature, obtain every 1 minute, or 30 seconds, or first temperature difference when 2 minutes.
Specifically, when air-conditioner is in refrigeration mode, first temperature difference difference that interior pipe temperature obtains for indoor temperature deducts, when air-conditioner is in heating mode, first temperature difference deducts the difference that indoor temperature obtains for interior pipe temperature.
Step S106, calculates the difference of first temperature difference and the default temperature difference, obtains second temperature difference, and wherein, the default temperature difference is the temperature difference in predetermined time indoor temperature and interior pipe temperature.
Alternatively, predetermined time comprises the initial launch moment of compressor.Compressor in the initial launch moment, obtain environment residing for the air-conditioner that detected indoor temperature and corresponding with indoor temperature in pipe temperature, calculate the temperature difference of indoor temperature now and interior pipe temperature, obtain the first temperature difference △ T
0, the default temperature difference comprises this first temperature difference △ T
0.After compressor operating, detect pipe temperature in the indoor temperature of environment residing for the air-conditioner in the first preset time period and the compressor of air-conditioner respectively continuously, calculate the first temperature difference △ T
1i, wherein, i is the i-th moment in the first preset time period.Obtain at the first temperature difference △ T in the first preset time period
1iwith default temperature difference △ T
0difference, obtain multiple second temperature difference △ T
1i-△ T
0, by more multiple second temperature difference △ T
1i-△ T
0multiple second temperature difference △ T can be obtained
1i-△ T
0minimum of a value T
1.
Obtain first temperature difference when the first preset time period, according to default temperature difference △ T
0second temperature difference when the first preset time period can be obtained, alternatively, the first temperature difference △ T after obtaining compressor operating every 1 minute time
11, calculate the first temperature difference △ T
11with default temperature difference △ T
0difference, obtain second temperature difference every 1 minute time, also, △ T
11-△ T
0the value obtained.
Alternatively, predetermined time also comprises the normal time of running of compressor.Compressor the jth moment of the normal time of running detect environment residing for air-conditioner indoor temperature and corresponding with indoor temperature in pipe temperature, calculate the first temperature difference △ T
j, the default temperature difference comprises this first temperature difference △ T
j.
Obtain first temperature difference when the second preset time period, alternatively, the second preset time period is 30 seconds, and after acquisition compressor normally runs, the jth moment plays the first temperature difference △ T every 30 seconds time
j+1, calculate the first temperature difference △ T
j+1with default temperature difference △ T
jdifference, obtain the second temperature difference △ T when the second preset time period is 30 seconds
j+1-△ T
j.Obtain first temperature difference every the 3rd preset time period, alternatively, the 3rd preset time period is 2 minutes, and after acquisition compressor normally runs, the jth moment plays the first temperature difference △ T every 2 minutes time
j+4, calculate the first temperature difference △ T
j+4with default temperature difference △ T
jdifference, obtain second temperature difference when the 3rd preset time period is 2 minutes, alternatively, second temperature difference when the 3rd preset time period is 2 minutes is △ T
j-△ T
j+4.
Alternatively, detect the interior pipe temperature of the indoor temperature of environment and the compressor of air-conditioner residing for the air-conditioner in the 3rd preset time period respectively continuously, calculate first temperature difference, obtain multiple differences of the default temperature difference of first temperature difference and the 3rd preset time period in the 3rd preset time period, obtain multiple second temperature difference, obtain the minimum of a value T of multiple second temperature difference
2.
According to second temperature difference, step S108, judges whether compressor occurs overload protection.
Obtain second temperature difference when preset time period, alternatively, obtain the second temperature difference △ T every 1 minute time
11-△ T
0.According to judging multiple second temperature difference △ T in step S106
1i-△ T
0minimum of a value T
1, judge △ T
11-△ T
0with T
1whether meet △ T
11-△ T
0>=T
1first pre-conditioned.As △ T
11-△ T
0>=T
1during establishment, then obtain at the i-th moment follow-up the second temperature difference △ T when the second preset time period is 30 seconds
j+1-△ T
j, i and j refers to synchronization herein.Judge △ T
j+1-△ T
j△ T whether is met with 0 DEG C
j+1-△ T
j>'s 0 DEG C is second pre-conditioned, meanwhile, obtains follow-up the second temperature difference △ T when the 3rd preset time period is 2 minutes
j-△ T
j+4, judge △ T
j-△ T
j+4with T
2whether meet △ T
j-△ T
j+4>=T
2the 3rd pre-conditioned, alternatively, T
2for every the 3rd preset time period being minimum second temperature difference in 2 minutes.If after the first pre-conditioned establishment, second is pre-conditioned and the 3rd pre-conditionedly also to meet simultaneously, then can judge that compressor occurs having occurred overload protection.
Second temperature difference of the embodiment of the present invention can calculate in multiple time period, judge whether second temperature difference when the first preset time period meets first pre-conditioned, if it is first pre-conditioned to judge that second temperature difference when the first preset time period meets, judge whether second temperature difference when the second preset time period meets second pre-conditioned and judge that whether satisfied second temperature difference when the 3rd preset time period is the 3rd pre-conditioned, meet the 3rd pre-conditioned if second temperature difference judging when the second preset time period meets second pre-conditioned and second temperature difference when the 3rd preset time period, then determine that overload protection appears in compressor, whether met first pre-conditioned by second temperature difference of different time sections, second pre-conditioned and the 3rd pre-conditioned thus achieve overload of compressor protection feedback function.
Step S110, if when judging that overload protection appears in compressor, controls compressor out of service.
If judge that overload protection appears in compressor, after control compressor is out of service, first the outdoor fan controlling air-conditioner is shut down, then judge that the pattern of air-conditioner is refrigeration mode or heating mode, if judge that air-conditioner is in refrigeration mode, need to reach refrigeration, then control the indoor fan start of air-conditioner, blow a cold wind over, if judge that air-conditioner is in heating mode, need to reach heating effect, the indoor fan then controlling air-conditioner is shut down, avoid blowing a cold wind over, thus after avoiding compressor operating stopping, indoor fan and outdoor fan remain in operation, occur blowing a cold wind over when needs heating effect, improve the comfortableness that air-conditioner uses.
After determining that overload protection appears in compressor, compressor is out of service, and air-conditioner can control compressor and again start.Often there is an overload protection in compressor; also be; often carry out once out of service and starting operation; then air-conditioner statistics compressor is from the current number of times altogether occurring overload protection of starting working; then judge that compressor occurs whether the number of times of overload protection reaches preset times; wherein; preset times is the maximum number of times allowing compressor to occur overload protection; if judge that compressor occurs that the number of times of overload protection has reached in advance and establishes number of times, then export the fault-signal that may be used for indicating compressor to break down.
The fault-signal of compressor can by exporting information to point out the mode removing compressor fault; alternatively; information is shutdown information; such as: the information of " system work at present is abnormal; be about to shutdown "; shutdown information can perform shutdown process to air-conditioner, and operation irregularity can refer to that compressor occurs that the number of times of overload protection reaches preset times herein.Information also can be break prompt information, and such as, the information of " system work at present is abnormal, by power-off ", the service behaviour avoiding the compressor broken down worsens further, affects the working condition of air-conditioner.Information can also be the information of conversion operation pattern; such as: the information of " system work at present is abnormal; be about to be converted to safe mode "; for pointing out, the operational mode of air-conditioner is changed; such as safe mode is the conversion between refrigeration mode, heating mode, dehumidification mode and air supply pattern; guarantee that compressor operating is under the safe mode of air-conditioner; avoid high frequent and occur overload protection, reduce the possibility of compressor generation overload protection easy initiating system pipeline booster.
Export after fault-signal at compressor, compressor by performing power-off to air-conditioner, the operation of shutdown or conversion operation pattern removes the fault of compressor, and compressor is normally worked.
The overload of compressor protecting control method of this embodiment adopts the temperature of the interior pipe detecting the indoor temperature of environment and the compressor of air-conditioner residing for air-conditioner; then the temperature difference of the temperature of indoor temperature and interior pipe is calculated; obtain first temperature difference; calculate the difference of first temperature difference and the default temperature difference again; obtain second temperature difference; wherein; the default temperature difference is the temperature difference of the temperature at predetermined time indoor temperature and interior pipe; finally judge whether compressor occurs overload protection according to second temperature difference; if when judging that overload protection appears in compressor, control compressor out of service.When judging that compressor occurs that the number of times of overload protection reaches preset times; then export the fault-signal that may be used for indicating compressor to break down; and by performing to air-conditioner the fault that power-off, shutdown or conversion operation pattern remove compressor, thus reduce the possibility of compressor generation overload protection easy initiating system pipeline booster.
Fig. 2 is the flow chart of overload of compressor protecting control method according to a second embodiment of the present invention.It should be noted that, the overload of compressor protecting control method of this embodiment can as the preferred embodiment of first embodiment of the invention, and as shown in Figure 2, this overload of compressor protecting control method comprises the following steps:
Step S202, detects the interior pipe temperature of the indoor temperature of environment and the compressor of air-conditioner residing for air-conditioner.
Pipe temperature in the indoor temperature of environment residing for air-conditioner and the compressor of corresponding air-conditioner is detected respectively continuously after the compressor operating of air-conditioner.After compression start runs, every preset time period, pipe temperature in the indoor temperature of environment residing for the air-conditioner detected and the compressor of air-conditioner is sampled, such as, preset time period is 1 minute, or 30 seconds, or 2 minutes, then every 1 minute, or 30 seconds, or 2 minutes indoor temperatures to environment residing for air-conditioner and corresponding with the indoor temperature of environment residing for air-conditioner in pipe temperature sample, obtain every 1 minute time, or when 30 seconds, or when 2 minutes environment residing for air-conditioner indoor temperature and corresponding with the indoor temperature of environment residing for air-conditioner in pipe temperature.
Calculate the temperature difference of indoor temperature and interior pipe temperature, obtain first temperature difference.
Step S204, start detected △ T every 1 minute after running
11-△ T
0>=T
1.
In this step, △ T
11for first temperature difference after compressor operating every 1 minute time, △ T
0for compressor is in the default temperature difference in initial launch moment, T
1for the minimum of a value in multiple differences of first temperature difference in the first preset time period and the default temperature difference.
Obtain first temperature difference when the first preset time period, according to default temperature difference △ T
0second temperature difference when the first preset time period can be obtained, alternatively, the first temperature difference △ T after obtaining compressor operating every 1 minute time
11, calculate the first temperature difference △ T
11with default temperature difference △ T
0difference, obtain second temperature difference every 1 minute time, also, △ T
11-△ T
0the value obtained.Judge △ T
11-△ T
0with T
1whether meet △ T
11-△ T
0>=T
1first pre-conditioned.If meet first pre-conditioned, then perform step S206, otherwise, perform step S202, detect the interior pipe temperature of the indoor temperature of environment and the compressor of air-conditioner residing for air-conditioner.
Step S206, follow-uply detected △ T every 30 seconds
j+1-△ T
j> 0 DEG C and follow-uply detected △ T every 2 minutes
j-△ T
j+4>=T
2.
In this step, △ T
j+1for compressor normally run after the jth moment play first temperature difference every 30 seconds time, △ T
jfor first temperature difference in jth moment, also, the temperature difference is preset, △ T
j+4for compressor normally run after the jth moment play first temperature difference every 2 minutes time, T
2for the minimum of a value of multiple differences of first temperature difference and the default temperature difference in the 3rd preset time period.
First temperature difference after judging compressor operating every 1 minute time and default temperature difference △ T
0difference meet △ T
11-△ T
0>=T
1if be now the jth moment of compressor operating, after the jth moment, obtain the first temperature difference △ T every 30 seconds time
j+1, calculate the first temperature difference △ T
j+1with default temperature difference △ T
jdifference, obtain the second temperature difference △ T when the second preset time period is 30 seconds
j+1-△ T
j, and obtain the jth moment after compressor normally runs and play the first temperature difference △ T every 2 minutes time
j+4, calculate the first temperature difference △ T
j+4with default temperature difference △ T
jdifference, obtain second temperature difference when the 3rd preset time period is 2 minutes, alternatively, second temperature difference when the 3rd preset time period is 2 minutes is △ T
j-△ T
j+4, judge △ T simultaneously
j+1-△ T
jwhether meet △ T
j+1-△ T
j>'s 0 is second pre-conditioned, △ T
j-△ T
j+4whether meet △ T
j-△ T
j+4>=T
2the 3rd pre-conditioned, if the secondth is pre-conditioned and the 3rd pre-conditionedly to set up simultaneously, then perform step S208.Otherwise, perform step S202, detect the interior pipe temperature of the indoor temperature of environment and the compressor of air-conditioner residing for air-conditioner.
Step S208, determines compressor generation overload protection.
When judging △ T
j+1-△ T
jmeet △ T
j+1-△ T
j>'s 0 is second pre-conditioned, and △ T
j-△ T
j+4meet △ T
j-△ T
j+4>=T
2the 3rd pre-conditioned, then can determine that compressor there occurs overload protection.
After determining compressor generation overload protection, control compressor out of service, alternatively, it is out of service that compressor can control compressor further by disconnection A.C. contactor.If air-conditioner is in refrigeration mode; then indoor fan start; if air-conditioner is in heating mode; then indoor fan is shut down, and meanwhile, controls outdoor fan and shuts down; thus after avoiding compressor operating stopping; indoor fan and outdoor fan remain in operation, and occur the situation of blowing a cold wind over when needing heating effect, improve the comfortableness that air-conditioner uses.
This embodiment adopts the interior pipe temperature detecting the indoor temperature of environment and the compressor of air-conditioner residing for air-conditioner, calculates the temperature difference of indoor temperature and interior pipe temperature, obtains first temperature difference, then detects after start runs and △ T detected every 1 minute
11-△ T
0>=T
1, and follow-uply △ T detected every 30 seconds
j+1-△ T
j> 0 DEG C, detected △ T follow-up every 2 minutes
j-△ T
j+4>=T
2, then can determine that compressor there occurs overload protection, thus reduce the possibility of compressor generation overload protection easy initiating system pipeline booster.
It should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.
Present invention also offers a kind of overload of compressor protecting control device, it should be noted that, the overload of compressor protecting control device of this embodiment may be used for the overload of compressor protecting control method performing the embodiment of the present invention.
Fig. 3 is the schematic diagram of overload of compressor protecting control device according to a first embodiment of the present invention.As shown in Figure 3, this device comprises: detecting unit 10, the first computing unit 20, second computing unit 30, first judging unit 40 and control unit 50.
Detecting unit 10, for the temperature of pipe in the compressor of the indoor temperature and air-conditioner that detect environment residing for air-conditioner.After the compressor operating of air-conditioner, detecting unit 10 detects the interior pipe temperature of the indoor temperature of environment residing for air-conditioner and the compressor of air-conditioner respectively, alternatively, detecting unit 10 detects the interior pipe temperature of the indoor temperature of environment and the compressor of air-conditioner residing for air-conditioner respectively continuously, and the interior pipe temperature of the indoor temperature of environment residing for air-conditioner and the compressor of air-conditioner does not have relation one to one in the same time.Preferably, after compression start runs, in the indoor temperature of environment residing for the air-conditioner that preset time period has detected detecting unit 10 and the compressor of air-conditioner, pipe temperature is sampled, and to obtain when preset time period pipe temperature in the indoor temperature of environment residing for air-conditioner and the compressor of air-conditioner.
First computing unit 20, for calculating the temperature difference of the temperature of indoor temperature and interior pipe, obtains first temperature difference.To detect in the indoor temperature of environment residing for air-conditioner and the compressor of air-conditioner after pipe temperature at detecting unit 10, obtain indoor temperature and corresponding with indoor temperature in pipe temperature, first computing unit 20 calculates the temperature difference of indoor temperature and interior pipe temperature, also be, first computing unit 20 calculate indoor temperature and corresponding with indoor temperature in the temperature difference of pipe temperature, obtain first temperature difference.Preferably, after compressor start runs, the first computing unit 20 when preset time period, calculate indoor temperature and corresponding with indoor temperature in the temperature difference of pipe temperature, obtain first temperature difference when preset time period.
Specifically, when air-conditioner is at refrigeration mode, first temperature difference difference that interior pipe temperature obtains for indoor temperature deducts that first computing unit 20 calculates, when air-conditioner is at heating mode, first temperature difference that the first computing unit 20 calculates deducts the difference that indoor temperature obtains for interior pipe temperature.
Second computing unit 30, for calculating the difference of first temperature difference and the default temperature difference, obtains second temperature difference, and wherein, the default temperature difference is the temperature difference of the temperature at predetermined time indoor temperature and interior pipe.Alternatively, predetermined time comprises the initial launch moment of compressor.Compressor in the initial launch moment, obtain environment residing for air-conditioner indoor temperature and corresponding with indoor temperature in pipe temperature, the first computing unit 20 calculates the temperature difference of indoor temperature now and interior pipe temperature, obtains the first temperature difference △ T
0, the default temperature difference comprises this first temperature difference △ T
0.After compressor operating, detecting unit 10 detects pipe temperature in the indoor temperature of environment residing for the air-conditioner in the first preset time period and the compressor of air-conditioner respectively continuously, and the first computing unit 20 calculates the first temperature difference △ T
1i, wherein, i is the i-th moment in the first preset time period.Second computing unit 30 calculates at the first temperature difference △ T in the first preset time period
1iwith default temperature difference △ T
0difference, obtain multiple second temperature difference △ T
1i-△ T
0, by more multiple second temperature difference △ T
1i-△ T
0multiple second temperature difference △ T can be obtained
1i-△ T
0minimum of a value T
1.
First computing unit 20 calculates first temperature difference when the first preset time period, according to default temperature difference △ T
0second temperature difference when the first preset time period can be obtained, alternatively, the first computing unit 20 calculate compressor operating after the first temperature difference △ T every 1 minute time
11, the second computing unit 30 calculates the first temperature difference △ T
11with default temperature difference △ T
0difference, obtain second temperature difference every 1 minute time, also, △ T
11-△ T
0the value obtained.
Alternatively, predetermined time comprises the normal time of running of compressor.Detecting unit 10 the jth moment of compressor normal time of running detect environment residing for air-conditioner indoor temperature and corresponding with indoor temperature in pipe temperature, the first computing unit 20 calculates the first temperature difference △ T
j, the default temperature difference comprises this first temperature difference △ T
j.
Obtain first temperature difference when the second preset time period, alternatively, the second preset time period is 30 seconds, and after acquisition compressor normally runs, the jth moment plays the first temperature difference △ T every 30 seconds time
j+1, the second computing unit 30 calculates the first temperature difference △ T
j+1with default temperature difference △ T
jdifference, obtain the second temperature difference △ T when the second preset time period is 30 seconds
j+1-△ T
j.Obtain first temperature difference every the 3rd preset time period, alternatively, the 3rd preset time period is 2 minutes, and after acquisition compressor normally runs, the jth moment plays the first temperature difference △ T every 2 minutes time
j+4, the second computing unit 30 calculates the first temperature difference △ T
j+4with default temperature difference △ T
jdifference, obtain second temperature difference when the 3rd preset time period is 2 minutes, alternatively, second temperature difference when the 3rd preset time period is 2 minutes is △ T
j-△ T
j+4.
Detecting unit 10 detects the interior pipe temperature of the indoor temperature of environment and the compressor of air-conditioner residing for the air-conditioner in the 3rd preset time period respectively continuously, first computing unit 20 calculates first temperature difference, second computing unit 30 calculates multiple differences of first temperature difference and the default temperature difference in the 3rd preset time period, obtain multiple second temperature difference, obtain the minimum of a value T of multiple second temperature difference
2.
According to second temperature difference, first judging unit 40, for judging whether compressor occurs overload protection.Second temperature difference calculates within multiple time period, and wherein, the first judging unit 40 comprises: the first judge module, can judge that whether satisfied second temperature difference when the first preset time period is first pre-conditioned by the first judge module.Second judge module, can meet first pre-conditioned by second temperature difference of the second judge module when judging every the first preset time period, it is second pre-conditioned and judge that whether satisfied second temperature difference when the 3rd preset time period is the 3rd pre-conditioned whether second temperature difference judging when the second preset time period meets; Determination module, can meet second pre-conditioned and second temperature difference when the 3rd preset time period by second temperature difference of determination module when judging every the second preset time period and meet the 3rd pre-conditioned, determine that overload protection appears in compressor.
Second computing unit 30 obtains second temperature difference when preset time period, alternatively, obtains the second temperature difference △ T every 1 minute time
11-△ T
0.According to multiple second temperature difference △ T that the second computing unit 30 calculates
1i-△ T
0minimum of a value T
1, the first judge module judges △ T
11-△ T
0with T
1whether meet △ T
11-△ T
0>=T
1first pre-conditioned.As △ T
11-△ T
0>=T
1during establishment, then the second computing unit 30 calculates at the i-th moment follow-up the second temperature difference △ T when the second preset time period is 30 seconds
j+1-△ T
j, i and j refers to synchronization herein.Second judge module judges △ T
j+1-△ T
j△ T whether is met with 0 DEG C
j+1-△ T
j>'s 0 DEG C is second pre-conditioned, meanwhile, and second temperature difference △ T of the second computing unit 30 calculated for subsequent when the 3rd preset time period is 2 minutes
j-△ T
j+4, the 3rd judge module judges △ T
j+4-△ T
jwith T
2whether meet △ T
j-△ T
j+4>=T
2the 3rd pre-conditioned, alternatively, T
2for every the 3rd preset time period being minimum second temperature difference in 2 minutes.If after the first pre-conditioned establishment, second is pre-conditioned and the 3rd pre-conditionedly also to meet simultaneously, then determination module can determine that compressor occurs having occurred overload protection.
Control unit 50, for when judging that overload protection appears in compressor, controls compressor out of service.Preferably, this device comprises detecting unit, for detecting the operational mode of air-conditioner.Judging that overload protection appears in compressor, after control compressor is out of service, the outdoor fan that control unit 50 also controls air-conditioner is shut down.When detecting unit detects that air-conditioner is in refrigeration mode; control unit 50 also controls the indoor fan start of air-conditioner; when detecting unit detects that air-conditioner is in heating mode; the indoor fan that control unit 50 also controls air-conditioner is shut down; thus after avoiding compressor operating stopping, indoor fan and outdoor fan remain in operation, when needs heating effect; there is the situation of blowing a cold wind over, improve the comfortableness that air-conditioner uses.
Fig. 4 is the schematic diagram of overload of compressor protecting control device according to a second embodiment of the present invention.In one embodiment of the invention, this device comprises: statistic unit 60, the second judging unit 70 and output unit 80.As shown in Figure 4, this overload of compressor protecting control device comprises: detecting unit 10, the first computing unit 20, second computing unit 30, first judging unit 40, control unit 50, statistic unit 60, the second judging unit 70 and output unit 80.
, there is the number of times of overload protection for adding up compressor in statistic unit 60.
Second judging unit 70, for judging that compressor occurs whether the number of times of overload protection reaches preset times.
Output unit 80, for judging that compressor occurs that the number of times of overload protection reaches preset times, export fault-signal, wherein, fault-signal is being used to indicate compressor and is breaking down.
The embodiment of the present invention is after determining that overload protection appears in compressor, and compressor is out of service, and air-conditioner can control compressor and again start.Often there is an overload protection in compressor, also be, often carry out once out of service and starting operation, then statistic unit 60 adds up compressor from the current number of times altogether occurring overload protection of starting working, then the second judging unit 70 judges that compressor occurs whether the number of times of overload protection reaches preset times, wherein, preset times is the maximum number of times allowing compressor to occur overload protection, if the second judging unit 70 judges that compressor occurs that the number of times of overload protection reaches preset times, then output unit 80 exports the fault-signal that may be used for indicating compressor to break down.
Fig. 5 is the schematic diagram of overload of compressor protecting control device according to a third embodiment of the present invention.In one embodiment of the invention, this overload of compressor protecting control device comprises: lifting unit 90.As shown in Figure 5, this device comprises: detecting unit 10, the first computing unit 20, second computing unit 30, first judging unit 40, control unit 50, statistic unit 60, the second judging unit 70, output unit 80 and lifting unit 90.
Lifting unit 90, for removing fault-signal by performing any one operation following to air-conditioner: power-off, shutdown or conversion operation pattern.After output unit 80 exports the fault-signal that breaks down of instruction compressor, lifting unit 90 by carrying out power-off to air-conditioner, the operation of shutdown or conversion operation pattern removes the fault of compressor, thus makes compressor recover normal work.
Alternatively, the air-conditioner in the overload of compressor protecting control device in this embodiment is air-conditioner with fixed frequency.When there is overload protection in air-conditioner with fixed frequency; the outdoor fan that control unit 50 controls air-conditioner with fixed frequency is shut down; if air-conditioner with fixed frequency is in refrigeration mode; control unit 50 controls the indoor fan start of air-conditioner with fixed frequency; if air-conditioner is in heating mode; the indoor fan that control unit 50 controls air-conditioner with fixed frequency is shut down; thus avoid compressor out of service after; indoor fan and the outdoor fan of air-conditioner with fixed frequency remain in operation; there is the phenomenon of blowing a cold wind over when needing to heat, improve the comfortableness that air-conditioner uses.Air-conditioner with fixed frequency can add up by statistic unit 60 number of times that overload protection appears in compressor; judge that compressor occurs whether the number of times of overload protection reaches preset times by the second judging unit 70; if the second judging unit 70 judges that the compressor of air-conditioner with fixed frequency occurs that the number of times of overload protection reaches preset times; then determine that the compressor of air-conditioner with fixed frequency breaks down; now, air-conditioner with fixed frequency cisco unity malfunction is at refrigeration mode or heating mode.Air-conditioner with fixed frequency exports fault-signal instruction compressor by output unit 80 again and breaks down, can by lifting unit 90 by performing power-off to air-conditioner with fixed frequency, the fault of compressor is removed in the operation of shutdown or conversion operation pattern, avoid high frequent occur overload protection and cause system pipeline to be frequently subject to the impact of pulse, the compressor achieving air-conditioner with fixed frequency has overload protection feedback function, thus make the main control computer of air-conditioner with fixed frequency can receive the overload protection information of compressor, overload protection is carried out to compressor, reduce the possibility of the compressor generation overload protection easy initiating system pipeline booster of air-conditioner with fixed frequency.
The overload of compressor protecting control device of the embodiment of the present invention detects the temperature of the interior pipe of the indoor temperature of environment residing for air-conditioner and the compressor of air-conditioner by detecting unit 10, then the temperature difference of the temperature of indoor temperature and interior pipe is calculated by the first computing unit 20, obtain first temperature difference, the difference of first temperature difference and the default temperature difference is calculated again by the second computing unit 30, obtain second temperature difference, wherein, the default temperature difference is the temperature difference of the temperature at predetermined time indoor temperature and interior pipe, judge whether compressor occurs overload protection by the first judging unit 40 according to second temperature difference, finally by control unit 50 when judging that overload protection appears in compressor, control compressor is out of service, thus reduce the possibility of compressor generation overload protection easy initiating system pipeline booster.
The embodiment of the present invention additionally provides a kind of air-conditioner; this air-conditioner can be air-conditioner with fixed frequency; it should be noted that; the air-conditioner of the embodiment of the present invention may be used for the overload of compressor protecting control device performing the embodiment of the present invention, also can perform the overload of compressor protecting control method of the embodiment of the present invention.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. an overload of compressor protecting control method, is characterized in that, comprising:
Detect the interior pipe temperature of the indoor temperature of environment and the compressor of described air-conditioner residing for air-conditioner;
Calculate the temperature difference of described indoor temperature and described interior pipe temperature, obtain first temperature difference;
Calculate the difference of described first temperature difference and the default temperature difference, obtain second temperature difference, wherein, the described default temperature difference is the temperature difference of indoor temperature and described interior pipe temperature described in predetermined time;
Judge whether described compressor occurs overload protection according to described second temperature difference; And
If when judging that overload protection appears in described compressor, control described compressor out of service.
2. method according to claim 1, is characterized in that, described second temperature difference calculates within multiple time period, judges whether described compressor occurs that overload protection comprises according to described second temperature difference:
Judge whether second temperature difference when the first preset time period meets first pre-conditioned;
If it is described first pre-conditioned to judge that described second temperature difference when the first preset time period meets, it is second pre-conditioned and judge that whether satisfied second temperature difference when the 3rd preset time period is the 3rd pre-conditioned whether second temperature difference judging when the second preset time period meets; And
If judge that described second temperature difference when the second preset time period meets described second pre-conditioned and second temperature difference when the 3rd preset time period and meets described 3rd pre-conditioned, determine that overload protection appears in described compressor.
3. method according to claim 2, is characterized in that, after determining that overload protection appears in described compressor, described method also comprises:
Add up the number of times that overload protection appears in described compressor;
Judge that described compressor occurs whether the number of times of overload protection reaches preset times; And
If judge that described compressor occurs that the number of times of overload protection reaches described preset times, export fault-signal, wherein, described fault-signal is used to indicate described compressor and breaks down.
4. method according to claim 3, is characterized in that, described fault-signal can be removed by performing any one operation following to described air-conditioner:
Power-off, shutdown or conversion operation pattern.
5. method according to claim 1, is characterized in that, if judge that overload protection appears in described compressor, control described compressor out of service after, described method also comprises:
Detect the operational mode of described air-conditioner; And
The outdoor fan controlling described air-conditioner is shut down,
When detecting that described air-conditioner is in refrigeration mode, control the indoor fan start of described air-conditioner, when detecting that described air-conditioner is in heating mode, the indoor fan controlling described air-conditioner is shut down.
6. an overload of compressor protecting control device, is characterized in that, comprising:
Detecting unit, for pipe temperature in the compressor of the indoor temperature and described air-conditioner that detect environment residing for air-conditioner;
First computing unit, for calculating the temperature difference of described indoor temperature and described interior pipe temperature, obtains first temperature difference;
Second computing unit, for calculating the difference of described first temperature difference and the default temperature difference, obtains second temperature difference, and wherein, the described default temperature difference is the temperature difference of indoor temperature and described interior pipe temperature described in predetermined time;
According to described second temperature difference, first judging unit, for judging whether described compressor occurs overload protection; And
Control unit, for when judging that overload protection appears in described compressor, controls described compressor out of service.
7. device according to claim 6, is characterized in that, described second temperature difference calculates within multiple time period, and described first judging unit comprises:
First judge module, it is first pre-conditioned whether second temperature difference for judging when the first preset time period meets;
Second judge module, if described first pre-conditioned for judging that described second temperature difference when the first preset time period meets, it is second pre-conditioned and judge that whether satisfied second temperature difference when the 3rd preset time period is the 3rd pre-conditioned whether second temperature difference judging when the second preset time period meets; And
Determination module, for judge described every the second preset time period time second temperature difference meet described second pre-conditioned and every the 3rd preset time period time second temperature difference meet described 3rd pre-conditioned, determine that overload protection appears in described compressor.
8. device according to claim 7, is characterized in that, described device also comprises:
, there is the number of times of overload protection for adding up described compressor in statistic unit;
Second judging unit, for judging that described compressor occurs whether the number of times of overload protection reaches preset times; And
Output unit, for judging that described compressor occurs that the number of times of overload protection reaches described preset times, export fault-signal, wherein, described fault-signal is being used to indicate described compressor and is breaking down.
9. device according to claim 8, is characterized in that, described device also comprises:
Lifting unit, for removing fault-signal by performing any one operation following to air-conditioner:
Power-off, shutdown or conversion operation pattern.
10. device according to claim 6, is characterized in that, described device also comprises:
Detecting unit, for detecting the operational mode of described air-conditioner,
Wherein, described control unit is shut down for the outdoor fan controlling described air-conditioner, when detecting that described air-conditioner is in refrigeration mode, controls the indoor fan start of described air-conditioner; when detecting that described air-conditioner is in heating mode, the indoor fan controlling described air-conditioner is shut down.
11. 1 kinds of air-conditioners, is characterized in that, comprise the overload of compressor protecting control device according to any one of claim 6 to 10.
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