CN106150999B - Overload of compressor protection detection, the method and device of control - Google Patents
Overload of compressor protection detection, the method and device of control Download PDFInfo
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- CN106150999B CN106150999B CN201610522864.9A CN201610522864A CN106150999B CN 106150999 B CN106150999 B CN 106150999B CN 201610522864 A CN201610522864 A CN 201610522864A CN 106150999 B CN106150999 B CN 106150999B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
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Abstract
The invention discloses the method and device of a kind of overload of compressor protection detection, control.Wherein, the method for overload of compressor protection detection comprises the following steps：Calculate the current change rate that changes over time of compressor operating electric current, the outdoor temperature difference rate of change that the outdoor temperature difference changes over time and the indoor temperature difference rate of change that the indoor temperature difference changes over time；And when the current change rate meets that predetermined current change condition, the outdoor temperature difference speed meet to preset outdoor temperature difference change condition, and the indoor temperature difference rate of change meets to preset indoor temperature difference change condition, judge that overload protection occurs in compressor.Which introduce the detection of rate of change; and just judge that overload protection occurs in compressor when only the current change rate of compressor operating electric current, outdoor temperature difference rate of change and indoor temperature difference rate of change are satisfied by condition; overload protection accuracy in detection is high; can effectively other protections make a distinction with compressor, avoid overload of compressor protect wrong report.
Description
Technical field
The present invention relates to Compressor Technology field, more particularly to a kind of overload of compressor protection detection, the side of control
Method and device.
Background technology
To ensure the normal operation of air conditioner, pressure protection, exhaust protection, overload guarantor are typically both provided with to air conditioner
Shield, lack the defencive functions such as fluorine protection, overload of compressor protection.Wherein, overload of compressor protection is last pipe protection, and it is played
Vital conduct.If this protection frequent movement, then, the compressor life-span will have a greatly reduced quality.And overload of compressor is protected
When, if air-conditioning system can not be detected accurately, other error protection actions may be caused, such as lack fluorine protection.If compressor goes out
Now protect by mistake, personnel's erroneous judgement after sale can be caused, so as to be delayed the maintenance progress of air conditioner.Therefore, overload of compressor protection tool
Some effective detection tools are of great significance.
At present, the method for overload of compressor detection and the protection of air conditioner typically has following two modes：
(1) start and stop that machine, is compressed by detecting indoor pipe temperature rate of change judge；
(2) the start and stop judgement for, being less than some value by detecting compressor current and being compressed machine.
But overload of compressor protection all effectively can not be lacked fluorine protection by both judgment modes with compressor carries out area
Point, compressor fault False Rate is high.
The content of the invention
Based on this, it is necessary to in conventional art the problem of judging accurately can not be protected to overload of compressor, carry
Overload of compressor can be protected for one kind and effectively be distinguished with the scarce fluorine protection of compressor, protect progress quasi- overload of compressor
The detection method and device of the overload of compressor protection really judged, and the method and device of overload of compressor protection control.
To realize that a kind of overload of compressor that the object of the invention provides protects the method detected, comprise the following steps：
Calculate the current change rate that changes over time of compressor operating electric current, the outdoor temp that the outdoor temperature difference changes over time
The indoor temperature difference rate of change that poor rate of change and the indoor temperature difference change over time；
When the current change rate meets that predetermined current change condition, the outdoor temperature difference speed meet default outdoor
Difference variation condition, and when the indoor temperature difference rate of change meets to preset indoor temperature difference change condition, judge that compressor occurs
Overload protection；
Wherein, the outdoor temperature difference is the difference between the outer tube temperature of the pipeline of outdoor environment temperature and outdoor heat exchanger
Value, the indoor temperature difference are the difference between the inner tube temperature of the pipeline of indoor environment temperature and indoor heat exchanger.
In one of the embodiments, it is described to calculate current change rate, the room that compressor operating electric current changes over time
The indoor temperature difference rate of change that the outdoor temperature difference rate of change and the indoor temperature difference that the outer temperature difference changes over time change over time, bag
Include following steps：
Obtain the first compressor operating electric current, the first outdoor temperature difference and the first indoor temperature difference at the first moment；Wherein, it is described
Difference of the first outdoor temperature difference between the outdoor environment temperature and outer tube temperature at the first moment, the first indoor temperature difference are the
Difference between the indoor environment temperature and inner tube temperature at one moment；
Obtain the temperature difference in the second compressor operating electric current, the outer temperature difference of second Room and the second Room at the second moment；Wherein, it is described
Difference of the outer temperature difference of second Room between the outdoor environment temperature and outer tube temperature at the second moment, the temperature difference is the in the second Room
Difference between the indoor environment temperature and inner tube temperature at two moment, it is spaced between second moment and first moment pre-
If duration；
The ratio between second compressor current and first compressor current is calculated as the curent change
Speed, the outer difference between the temperature difference and the first outdoor temperature difference of the second Room is calculated as the outdoor difference variation speed
Rate, the difference in the second Room between the temperature difference and the first indoor temperature difference is calculated as the indoor temperature difference rate of change.
In one of the embodiments, the outdoor temperature difference is between the outdoor environment temperature and compressor outdoor temperature
Difference absolute value, the absolute value of difference of the indoor temperature difference between the indoor environment temperature and inner tube temperature；Institute
Absolute value of the outdoor temperature difference rate of change for the outer difference between the temperature difference and the first outdoor temperature difference of the second Room is stated, it is described
Indoor temperature difference rate of change is the absolute value of the difference between the temperature difference and the first indoor temperature difference in the second Room；And
When the current change rate within the scope of the first default value, the outdoor temperature difference rate of change is more than or equal to
During the second default value, and when the indoor temperature difference rate of change is more than or equal to three default values, judge that the compressor goes out
Existing overload protection.
In one of the embodiments, the first default value scope is 0.1~0.3, and second default value is 2
~5, the 3rd default value is 2~5；
The preset duration being spaced between second moment and first moment is 20s~60s.
A kind of device of overload of compressor protection detection based on same inventive concept, described device include：
Computing module, for calculating current change rate, the outdoor temperature difference that compressor operating electric current changes over time at any time
Between the indoor temperature difference rate of change that changes over time of the outdoor temperature difference that changes and the indoor temperature difference；
Judge module, for meeting predetermined current change condition, the outdoor difference variation when the current change rate
Speed meets to preset outdoor temperature difference change condition, and the indoor temperature difference rate of change meets to preset indoor temperature difference change condition
When, judge that overload protection occurs in compressor；
Wherein, difference of the outdoor temperature difference between outdoor environment temperature and outer tube temperature, the indoor temperature difference are room
Difference between interior environment temperature and inner tube temperature.
In one of the embodiments, the computing module includes：
First moment parameter acquiring submodule, for obtaining the first compressor operating electric current, first outdoor at the first moment
The temperature difference and the first indoor temperature difference；Wherein, the described first outdoor temperature difference for the first moment outdoor environment temperature and outer tube temperature it
Between difference, the first indoor temperature difference for the first moment indoor environment temperature and inner tube temperature between difference；
Second moment parameter acquiring submodule, for obtaining the second compressor operating electric current at the second moment, outside second Room
The temperature difference in the temperature difference and second Room；Wherein, the outer temperature difference of the second Room for the second moment outdoor environment temperature and outer tube temperature it
Between difference, difference of the temperature difference between the indoor environment temperature and inner tube temperature at the second moment in the second Room, described the
Preset duration is spaced between two moment and first moment；
Rate of change calculating sub module, for calculating between second compressor current and first compressor current
Ratio as the current change rate, calculate the outer difference between the temperature difference and the first outdoor temperature difference of the second Room and make
For the outdoor temperature difference rate of change, the difference in the second Room between the temperature difference and the first indoor temperature difference is calculated as institute
State indoor temperature difference rate of change.
The method of a kind of overload of compressor protection control based on same inventive concept, when the foregoing any embodiment of use
After the method for overload of compressor protection detection detects that overload protection occurs in compressor, control the compressor out of service.
In one of the embodiments, methods described is further comprising the steps of：
Record the compressor and overload protection number occur；And/or
Shield the scarce fluorine protection of the compressor.
In one of the embodiments, methods described is further comprising the steps of：
Send overload of compressor protection alarm；And/or
The load out of service being connected with the compressor.
A kind of device of overload of compressor protection control based on same inventive concept, described device include foregoing any reality
Apply example overload of compressor protection detection device, and using the overload of compressor protection detection device to compressor whether
Generation overload protection is detected；
Also include control module, for detecting that the compressor occurs when the device of overload of compressor protection detection
After overload protection, control the compressor out of service, and/or want the compressor time of overload protection occur described in record
Number, and/or the scarce fluorine protection of the shielding compressor, and/or send overload of compressor protection alarm, and/or it is out of service with
The connected load of the compressor.
Beneficial effects of the present invention include：A kind of method of overload of compressor protection detection provided by the invention, it is calculated
The outdoor temperature difference rate of change that current change rate that compressor operating electric current changes over time, the outdoor temperature difference change over time with
And the indoor temperature difference rate of change that the indoor temperature difference changes over time；And when the current change rate meets that predetermined current changes bar
Part, the outdoor temperature difference speed meet to preset outdoor temperature difference change condition, and the indoor temperature difference rate of change meets to preset
During indoor temperature difference change condition, judge that overload protection occurs in compressor.Which introduce the detection of rate of change, and only compressor
The current change rate of running current, outdoor temperature difference rate of change and indoor temperature difference rate of change are satisfied by just judging during condition
There is overload protection in compressor, and overload protection accuracy in detection is high, can effectively other protections make a distinction with compressor, avoid
The wrong report of overload of compressor protection.
Brief description of the drawings
Fig. 1 is the flow chart of the method for the overload of compressor protection detection of an embodiment；
Fig. 2 is the composition schematic diagram of the device of the overload of compressor protection detection of an embodiment；
Fig. 3 is to calculate module composition schematic diagram in the device of the overload of compressor protection detection of an embodiment；
Fig. 4 is the flow chart of the method for the overload of compressor protection control of an embodiment；
Fig. 5 is the flow chart of the method for the overload of compressor protection control of another embodiment；
Fig. 6 is the flow chart of the method for the overload of compressor protection control of another embodiment；
Fig. 7 is the composition schematic diagram of the device of the overload of compressor protection control of an embodiment.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, the present invention is pressed below in conjunction with accompanying drawing
The embodiment of the method, apparatus of contracting machine overload protection detection and the method, apparatus of overload of compressor protection control is entered
Row explanation.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
As shown in figure 1, the method for the overload of compressor protection detection of one of embodiment, comprises the following steps.
S100, calculate the current change rate that changes over time of compressor operating electric current, the outdoor temperature difference changes over time
The indoor temperature difference rate of change that outdoor temperature difference rate of change and the indoor temperature difference change over time.
Wherein, difference of the outdoor temperature difference between outdoor environment temperature and outer tube temperature, the indoor temperature difference are indoor environment temperature
Difference between degree and inner tube temperature.
It will be understood by those skilled in the art that the method for the overload of compressor protection detection of the present embodiment, in implementation process
In, it is necessary to the parameter of detection is 5, including compressor operating electric current, outdoor environment temperature, indoor environment temperature, outer tube temperature
And inner tube temperature.And in the present embodiment when carrying out overload protection detection, it is necessary to judge 3 variables (parameter) with the time
Situation of change (rate of change), therefore, this method needed in implementation process detect different time point each parameter ginseng
Numerical value.Specifically, such as one-time detection can be carried out to the numerical value of each parameter at interval of a period of time.
S200, when current change rate meets that predetermined current change condition, outdoor temperature difference speed meet default outdoor temp
Poor change condition, and indoor temperature difference rate of change meet preset the indoor temperature difference change condition when, judge compressor occur overload protect
Shield.
It should be noted that being finally that the situation of change of 3 parameters is detected in this method, specially compressor is transported
The current change rate of row electric current, outdoor temperature difference rate of change and indoor temperature difference rate of change.In addition, when compressor occurred
When carrying protection, under compressor operating electric current can become, and the outdoor temperature difference and the indoor temperature difference can all reduce.But if compressor is steady
When running surely, the difference between outdoor environment temperature and outer tube temperature, more stable (refrigeration mould can be stabilized in certain period of time
Formula or heating mode, be typically not in the conversion from refrigeration mode to heating mode).Moreover, simultaneously, indoor temperature with it is interior
Difference between pipe temperature also can be more stable.But when overload protection occurs in compressor, the running current of compressor, with
And larger change can all occur for the difference between difference between inner tube temperature and indoor environment temperature, outdoor temperature and outer tube temperature
Change.Therefore, it can judge whether compressor overload protection occurs by detecting the rate of change of these three parameters.
More specifically, when compressor stable operation, the difference between outer tube temperature and outdoor environment temperature can be bigger,
Difference between inner tube temperature and indoor environment temperature also can be bigger, but when overload protection occurs in compressor, compressor
No longer normal operation, the heating of air-conditioning or refrigeration are affected, and outer tube temperature can move closer to outdoor environment temperature, and
Inner tube temperature also moves closer to indoor environment temperature.Therefore, to being compressed in the present embodiment in machine overload protection detection process,
The detection of detection and indoor temperature difference rate of change to outdoor temperature difference rate of change, mainly to the two parameter fall off rates
Detection, and difference is from the speed of the process to diminish greatly.
View of the above, it will be seen that the method for the overload of compressor protection detection of the present embodiment, it will be by that will compress
The rate of change of machine running current is with outdoor temperature difference rate of change and indoor temperature difference rate of change three collectively as compressor mistake
The parameter of detection is carried, this failure is protected so as to accurately lock overload of compressor, and excludes other kinds of compressor and protects
Protect the influence to compressor operation parameters.It is used as especially into room temperature difference variation and indoor difference variation and judges compressor
The decision content of overload protection, compressor effectively can be lacked into fluorine protection and be distinguished with overload of compressor protection.
In addition, it should also be noted that, for compressor current rate of change, outdoor temperature difference rate of change and Indoor Temperature
Poor rate of change, these three parameters are the condition met simultaneously in machine overload protection detection process is compressed, therefore, in reality
In the detection process of border, whether these three parameters are met with the no sequencing of the judgement of condition.And these three parameters are related to
5 variables：The detection of indoor environment temperature, outdoor environment temperature, inner tube temperature, outer tube temperature and compressor operating electric current,
Can be by setting corresponding sensor to realize respectively.Specifically, compressor current I can be detected by current transformer, pass through sense
Inner tube temperature (T on the inside of thermometer bulb sensing chamberInner tube), pass through the outer tube temperature (T on the outside of the sensing chamber of temperature-sensitive bag 2Outer tube), pass through temperature-sensitive bag
3 sensing chamber inside environment temperature (TInner ring), pass through the environment temperature (T on the outside of the sensing chamber of temperature-sensitive bag 4Outer shroud) so as to can obtain outdoor temp
Difference is：
△TOutside=| TOuter shroud-TOuter tube| (1)
The indoor temperature difference is：
△TIt is interior=| TInner ring-TInner tube| (2)
Wherein, the inner tube temperature (T of indoorInner tube) for indoor heat exchanger pipeline temperature.The outer tube temperature of outside
(TOuter tube) for outdoor heat exchanger pipeline temperature.And the pipeline of outdoor heat exchanger refers to internal directly circulation in outdoor heat exchanger
The pipeline of refrigerant；The pipeline of indoor heat exchanger refers to the pipeline of internal directly circulation refrigerant in indoor heat exchanger.
After compressor start, the detected value of 5 parameters of continuous acquisition, and judge the curent change speed of compressor operating electric current
Rate and indoor temperature difference △ TIt is interiorIndoor temperature difference rate of change and outdoor temperature difference △ TOutsideOutdoor temperature difference rate of change whether reach
The preparatory condition of overload of compressor protection, if it is, judging that compressor is in overload protection state.
Further, for compressor operating electric current current change rate calculating, can be at interval of a preset duration
Record a compressor operating electric current In, wherein n=1,2,3,4,5 ....And counted while recording compressed machine running current
Calculate outdoor temperature difference △ TOuter nAnd indoor temperature difference △ TInterior n。
The first compressor operating electric current, the first outdoor temperature difference and the first indoor temperature difference at the first moment (n moment) are obtained,
The temperature difference in the second compressor operating electric current, the outer temperature difference of second Room and the second Room at the second moment (n+1 moment) is obtained again.Wherein,
Preset duration is spaced between second moment and the first moment.
And the ratio k calculated according to formula (3) between the second compressor current and the first compressor current becomes as electric current
Change speed, calculating the outer difference △ T ' between the temperature difference and the first outdoor temperature difference of second Room as the outdoor temperature difference according to formula (4) becomes
Change speed, according to the difference △ T in formula (5) calculating second Room between the temperature difference and the first indoor temperature difference as indoor difference variation
Speed.
K=In+1/In (3)
△ T '=| △ TOuter n+1-△TOuter n| (4)
△ T=| △ TInterior n+1-△TInterior n| (3)
And further judge whether compressor enters overload protection state by judging k, △ T ' and △ T size.
No matter compressor operating is under refrigeration mode, heating mode or dehumidification mode state, after compressor start operation,
One outdoor temperature difference of a compressor operating electric current, an indoor temperature difference are calculated at interval of foregoing preset duration.And in compressor
The indoor temperature difference of the current indoor temperature difference and previous moment is made the difference to obtain indoor temperature difference rate of change after opening operation certain time,
The outdoor temperature difference of the current outdoor temperature difference and previous moment is made the difference to obtain outdoor temperature difference rate of change, while also by current time
Compressor operating electric current and the compressor operating electric current of previous moment do ratio, obtain the compressor current change speed at current time
Rate.When these three speed fall off rates all meet condition, then it is assumed that there occurs overload protection for compressor.
Specifically it is used as a kind of embodiment, it is believed that the compressor operating electric current and first at the second moment (current)
When the ratio of moment (previous moment) compressor operating electric current is between 0.1~0.3 (the first default value scope), compressor
Current change rate meets condition；And when indoor temperature difference rate of change △ T >=a (the 3rd default value), it is believed that the indoor temperature difference
Rate of change meets to require；Outdoor difference variation speed is thought when outdoor temperature difference rate of change △ T ' >=b (the second default value)
Rate meets to require.And it is preferred that the current change rate of first compression machine, outdoor difference variation can be carried out at interval of 20s~60s
The calculating of speed and indoor temperature difference rate of change.And a and b value, preferably can be between 2 degree~5 degree.
Moreover, in order to reduce rate of false alarm, just preferably proceed by compressor fortune after compressor start operation certain time
The detection of row electric current, outdoor environment temperature, indoor environment temperature, inner tube temperature and outer tube temperature.Such as, can implement as one kind
Mode, the detection of each parameter can be carried out again after compressor starts shooting operation 20s~60s, and it is further as judgement pressure
Whether contracting machine occurs the judgement parameter of overload protection failure.
It will be understood by those skilled in the art that in this implementation, become for compressor operating current change rate, the outdoor temperature difference
Change speed and indoor temperature difference rate of change, it is necessary to meet to judge compressor simultaneously there occurs overload protection, therefore, to this
The detection and calculating of three parameters, be preferably based on the parameter of synchronization, so could more accurately judge corresponding to this
Moment compressor has sent out overload protection.
In addition, in other embodiments, also can be according to difference variation slope outside duration calculation room as outdoor difference variation
Speed, and according to difference variation slope in duration calculation room as indoor temperature difference rate of change, or can also be according to the time
Calculate the current change rate of compressor operating electric current.
Explanation is further needed exist for, previous embodiment is carrying out outdoor temperature difference rate of change and indoor temperature difference rate of change
During calculating, the mode for calculating absolute value is employed.After the calculating of absolute value, make overload of compressor protection detection
Method has more versatility, and no matter compressor operating can use unified calculating side in heating mode or in refrigeration mode
Whether formula breaks down to protect to compressor is effectively detected.Certainly, in other embodiments, it can also use and press respectively
The outdoor temperature difference and outdoor temperature difference rate of change, and the indoor temperature difference and indoor difference variation speed are carried out under contracting machine difference operational mode
The calculating of rate.Specifically, during heating mode, indoor environment temperature is less than inner tube temperature, and inner tube temperature can be used to subtract for the indoor temperature difference
Remove indoor environment temperature；And during refrigeration mode, indoor environment temperature is higher than inner tube temperature, and indoor environment temperature can be used in the indoor temperature difference
Degree subtracts the acquisition of inner tube temperature.The acquisition of outdoor temperature is then just opposite.But for the indoor temperature difference, and the outdoor temperature difference, when
When generation overload of compressor is protected, it is to be reduced, and simply sees whether decrease speed has reached to a certain degree for it.
Based on same inventive concept, a kind of device of overload of compressor protection detection is also provided, because this device solves to ask
The principle of topic is similar to a kind of foregoing method of overload of compressor protection detection, and therefore, the implementation of the device can be according to foregoing
The specific steps of method are realized, are repeated part and are repeated no more.
Referring to Fig. 2, the device 010 of the overload of compressor protection detection of one of embodiment, including the He of computing module 100
Judge module 200.
Wherein, computing module 100, for calculating current change rate, the outdoor that compressor operating electric current changes over time
The indoor temperature difference rate of change that the outdoor temperature difference and the indoor temperature difference that the temperature difference changes over time change over time.The outdoor temperature difference
For the difference between outdoor environment temperature and outer tube temperature, the indoor temperature difference is between indoor environment temperature and inner tube temperature
Difference.
Judge module 200, for current change rate, outdoor temperature difference rate of change and indoor temperature difference rate of change with
Preparatory condition is judged.When current change rate meets that predetermined current change condition, outdoor temperature difference rate of change meet to preset
Outdoor temperature difference change condition, and indoor temperature difference rate of change meet preset the indoor temperature difference change condition when, judge compressor occur
Overload protection.
The device 010 of the overload of compressor protection detection of the present embodiment, by outdoor temperature difference rate of change, indoor difference variation
The current change rate of speed and compressor operating electric current is collectively as judging whether compressor occurs the judgement of overload protection
Condition, so as to accurately detect the overload protection of compressor, avoid in conventional art overload of compressor protection and compressor its
He is protected the problem of can not separating.
As shown in figure 3, in the device 010 of the overload of compressor protection detection of another embodiment, computing module 100 includes
First moment parameter acquiring submodule 110, the second moment parameter acquiring submodule 120 and rate of change calculating sub module 130.
Wherein, the first moment parameter acquiring submodule 110, for obtain the first moment the first compressor operating electric current,
The first outdoor temperature difference and the first indoor temperature difference.Second moment parameter acquiring submodule 120, for obtaining second pressure at the second moment
The temperature difference in the outer temperature difference of contracting machine running current, second Room and second Room；Wherein, the first outdoor temperature difference is the outdoor environment at the first moment
Difference between temperature and outer tube temperature, the first indoor temperature difference is between the indoor environment temperature and inner tube temperature at the first moment
Difference.Difference of the outer temperature difference of second Room between the outdoor environment temperature and outer tube temperature at the second moment, the temperature difference is in second Room
Difference between the indoor environment temperature and inner tube temperature at the second moment.
Herein, the process and side that the first moment parameter acquiring submodule and the second moment parameter acquiring submodule parameter calculate
Method is identical, and simply two submodules are calculated parameter at different moments respectively.In the present embodiment, the second moment and the
Preset duration is spaced between one moment.Further, the preset duration can take some numerical value between 20s~60s.
The rate of change calculating sub module 130, for calculating between the second compressor current and the first compressor current
Ratio as current change rate, i.e. k=In+1/In, wherein, In+1For the compressor operating electric current of the second moment detection, InFor
The compressor operating electric current of first moment detection.Calculate the outer difference or difference between the temperature difference and the first outdoor temperature difference of second Room
Absolute value as outdoor temperature difference rate of change, i.e. △ T '=| △ TOuter n+1-△TOuter n|, wherein, TOuter nFor the first moment outdoor temp
Difference, △ TOuter n+1For the second moment outdoor temperature difference.Calculate difference or difference between the temperature difference and the first indoor temperature difference in second Room
Absolute value as indoor temperature difference rate of change, i.e. △ T=| △ TInterior n+1-△TInterior n|, wherein, △ TInterior nFor the first moment Indoor Temperature
Difference, △ TInterior n+1For the second moment interior temperature difference.Follow-up judge module further can judge to press according to k, △ T ' and △ T size
Whether contracting machine enters overload protection state.
It should be noted that the difficulty subsequently judged can be reduced using the calculation of absolute value to △ T ' and △ T, and it is right
Compression cooling operation mode and heating operation mode judgment formula form unification.Certainly in other embodiments, if do not used
The mode of absolute value judged whether can meet that condition is sentenced to each parameter respectively under compressor difference operational mode
It is disconnected.
Specifically, in one of the embodiments, the compressor operating electric current at the second moment (current) and the first moment are (preceding
One moment) compressor operating electric current ratio between 0.1~0.3 (the first default value scope) when, it is believed that the electricity of compressor
Stream rate of change meets condition；And when indoor temperature difference rate of change △ T >=a (the 3rd default value), it is believed that the indoor temperature difference becomes
Change speed to meet to require；Think outdoor temperature difference rate of change when outdoor temperature difference rate of change △ T ' >=b (the second default value)
Meet to require.And it is preferred that the current change rate of first compression machine, outdoor difference variation speed can be carried out at interval of 20s~60s
The calculating of rate and indoor temperature difference rate of change.And a and b value, preferably can be between 2 degree~5 degree.
Moreover, in order to reduce rate of false alarm, just preferably proceed by compressor fortune after compressor start operation certain time
The detection of row electric current, outdoor environment temperature, indoor environment temperature, inner tube temperature and outer tube temperature.Such as, can implement as one kind
Mode, the detection of each parameter can be carried out again after compressor starts shooting operation 20s~60s, and it is further as judgement pressure
Whether contracting machine occurs the judgement parameter of overload protection failure.
Based on the method for foregoing overload of compressor protection detection, while also provide a kind of overload of compressor protection control
Method, it enters using whether the method for the overload of compressor protection detection of foregoing any embodiment occurs overload protection to compressor
Row detection, after detecting that overload protection occurs in compressor, as shown in figure 4, this method performs step S101 according to testing result,
Control compressor out of service.If being not detected by compressor occurs overload protection, without control, i.e. compressor continues just
Often operation.
The method of the overload of compressor protection control of the present embodiment, after detecting that overload protection occurs for compressor, in time
Control compressor out of service, avoid the damage for causing other more serious to compressor.
As shown in figure 5, in the method for the overload of compressor protection control of another embodiment, it is further comprising the steps of：
There is overload protection number in S102, recording compressed machine.
S103, shield the scarce fluorine protection of compressor.
After the number of recording compressed machine overload protection, the number for helping subsequently to be protected according to overload of compressor is to compressor
Overall performance analyzed, to compressor design manufacture improvement it is significant.
And in the present embodiment, after detecting that overload protection occurs for compressor, directly shield the protection that may relate to
Action, fluorine protection is especially easily lacked as caused by being protected overload of compressor.It in this way, can avoid that overload protection occurs in compressor
Afterwards, it is simultaneously emitted by lacking the false alarm of fluorine protection, influences judgement of the maintenance personal to compressor fault, influence maintenance efficiency.Therefore,
The method of the overload of compressor protection control of the present embodiment can more accurately detect overload of compressor protection, so as to effectively improve
Overload of compressor protects the maintenance efficiency of failure.
It also should be noted that in other embodiments, may there was only step S102 or only step S103.
It is as shown in fig. 6, further comprising the steps of in the method for the overload of compressor protection control of another embodiment：
S104, send overload of compressor protection alarm；
S105, the load out of service being connected with compressor.
Wherein, it is described send overload of compressor protection alarm can send " unit exception run, please contact in time maintenance people
The prompting of member ", and failure code is shown simultaneously；Also the prompting of " unit exception is run, i.e., will be out of service " etc. can be sent.And
The overload of compressor protection alarm of corresponding voice message can be simultaneously emitted by.Further, stopping and pressure can be also controlled simultaneously
Contracting machine is connected other equipment, prevents compressor misoperation (generation overload protection) from influenceing or even damaging other associated devices.
In addition, step S104 and step S105 does not have strict front and rear execution sequence in the present embodiment, in carrying out practically mistake
Cheng Zhongke is set according to the actual requirements, or execution can also simultaneously for two steps.
It is corresponding with the method for aforementioned compressor overload protection control, a kind of overload of compressor protection control is also provided
Device, as shown in fig. 7, the device includes the device 010 of the overload of compressor protection detection of foregoing any embodiment, and use
Whether the device 010 of the overload of compressor protection detection occurs overload protection to compressor is detected, and is compressed when detecting
After overload protection occurs for machine, turn to perform the control module 020.And control module 020, detected for being protected when overload of compressor
Device detect that overload protection occurs in compressor after, control compressor it is out of service, and/or record want compressor to occur
The number of protection, and/or the scarce fluorine protection of shielding compressor are carried, and/or sends overload of compressor protection alarm, and/or is stopped
Run the load being connected with compressor.
The device of the overload of compressor protection control of the present embodiment, it can accurately detect the shape of overload of compressor protection
State, and corresponding control process can be carried out to overload protection in time, preventing from protecting due to overload of compressor influences other equipment
Operation, or other associated devices are caused to damage.
One of ordinary skill in the art will appreciate that realize all or part of flow in above-described embodiment method, being can be with
The hardware of correlation is instructed to complete by computer program, described program can be stored in a computer read/write memory medium
In, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
- A kind of 1. method of overload of compressor protection detection, it is characterised in that comprise the following steps：Calculate the current change rate that changes over time of compressor operating electric current, the outdoor temperature difference that the outdoor temperature difference changes over time becomes Change the indoor temperature difference rate of change that speed and the indoor temperature difference change over time；When the current change rate meets that predetermined current change condition, the outdoor temperature difference rate of change meet default outdoor temp Poor change condition, and when the indoor temperature difference rate of change meets to preset indoor temperature difference change condition, judge that compressor occurred Carry protection；Wherein, the outdoor temperature difference is the difference between the outer tube temperature of the pipeline of outdoor environment temperature and outdoor heat exchanger, institute The indoor temperature difference is stated as the difference between the inner tube temperature of indoor environment temperature and the pipeline of indoor heat exchanger.
- 2. according to the method for claim 1, it is characterised in that the electricity for calculating compressor operating electric current and changing over time The Indoor Temperature that the outdoor temperature difference rate of change and the indoor temperature difference that stream rate of change, the outdoor temperature difference change over time change over time Poor rate of change, comprises the following steps：Obtain the first compressor operating electric current, the first outdoor temperature difference and the first indoor temperature difference at the first moment；Wherein, described first Difference of the outdoor temperature difference between the outdoor environment temperature and outer tube temperature at the first moment, when the first indoor temperature difference is first Difference between the indoor environment temperature and inner tube temperature at quarter；Obtain the temperature difference in the second compressor operating electric current, the outer temperature difference of second Room and the second Room at the second moment；Wherein, described second Difference of the outdoor temperature difference between the outdoor environment temperature and outer tube temperature at the second moment, when the temperature difference is second in the second Room Difference between the indoor environment temperature and inner tube temperature at quarter, when being spaced default between second moment and first moment It is long；The ratio between the second compressor operating electric current and the first compressor operating electric current is calculated as the electric current Rate of change, the outer difference between the temperature difference and the first outdoor temperature difference of the second Room is calculated as the outdoor difference variation Speed, the difference in the second Room between the temperature difference and the first indoor temperature difference is calculated as the indoor difference variation speed Rate.
- 3. according to the method for claim 2, it is characterised in that the outdoor temperature difference is the outdoor environment temperature and outdoor The absolute value of difference between the outer tube temperature of the pipeline of heat exchanger, the indoor temperature difference are the indoor environment temperature and inner tube The absolute value of difference between temperature；The outdoor temperature difference rate of change is the outer temperature difference of the second Room and first outdoor temp The absolute value of difference between difference, the indoor temperature difference rate of change are the temperature difference and the described first indoor temperature difference in the second Room Between difference absolute value；AndWhen the current change rate within the scope of the first default value, the outdoor temperature difference rate of change be more than or equal to second Default value, and when the indoor temperature difference rate of change is more than or equal to three default values, judge that the compressor overloads Protection.
- 4. according to the method for claim 3, it is characterised in that the first default value scope is 0.1~0.3, described Second default value is 2~5, and the 3rd default value is 2~5；The preset duration being spaced between second moment and first moment is 20s~60s.
- 5. a kind of device of overload of compressor protection detection, it is characterised in that described device includes：Computing module, for calculating current change rate, the outdoor temperature difference that compressor operating electric current changes over time anaplasia at any time The indoor temperature difference rate of change that the outdoor temperature difference rate of change of change and the indoor temperature difference change over time；Judge module, for meeting predetermined current change condition, the outdoor temperature difference rate of change when the current change rate Meet to preset outdoor temperature difference change condition, and when the indoor temperature difference rate of change meets to preset indoor temperature difference change condition, sentence Determine compressor and overload protection occur；Wherein, the outdoor temperature difference is the difference between the outer tube temperature of the pipeline of outdoor environment temperature and outdoor heat exchanger, institute The indoor temperature difference is stated as the difference between the inner tube temperature of indoor environment temperature and the pipeline of indoor heat exchanger.
- 6. device according to claim 5, it is characterised in that the computing module includes：First moment parameter acquiring submodule, for obtaining the first compressor operating electric current, the first outdoor temperature difference at the first moment And the first indoor temperature difference；Wherein, the described first outdoor temperature difference is between the outdoor environment temperature and outer tube temperature at the first moment Difference, difference of the first indoor temperature difference between the indoor environment temperature and inner tube temperature at the first moment；Second moment parameter acquiring submodule, for obtaining the second compressor operating electric current at the second moment, the temperature difference outside second Room And the temperature difference in second Room；Wherein, the outer temperature difference of the second Room is between the outdoor environment temperature and outer tube temperature at the second moment Difference, difference of the temperature difference between the indoor environment temperature and inner tube temperature at the second moment in the second Room, when described second Carve and be spaced preset duration between first moment；Rate of change calculating sub module, for calculating the second compressor operating electric current and the first compressor operating electric current Between ratio as the current change rate, calculate the outer difference between the temperature difference and the first outdoor temperature difference of the second Room Value is used as the outdoor temperature difference rate of change, calculates the difference in the second Room between the temperature difference and the first indoor temperature difference and makees For the indoor temperature difference rate of change.
- A kind of 7. method of overload of compressor protection control, it is characterised in that the compressor of any one of usage right requirement 1 to 4 Whether the method for overload protection detection occurs overload protection to compressor and detects, when detecting that the compressor overloads After protection, control the compressor out of service.
- 8. according to the method for claim 7, it is characterised in that methods described is further comprising the steps of：Record the compressor and overload protection number occur；And/orShield the scarce fluorine protection of the compressor.
- 9. according to the method for claim 7, it is characterised in that methods described is further comprising the steps of：Send overload of compressor protection alarm；And/orThe load out of service being connected with the compressor.
- 10. a kind of device of overload of compressor protection control, it is characterised in that described device is included described in claim 5 or 6 The device of overload of compressor protection detection, and protect whether compressor occurred the device of detection using the overload of compressor Protection is carried to be detected；Also include control module, for detecting that the compressor overloads when the device of overload of compressor protection detection After protection, control the compressor out of service, and/or record the compressor and the number of overload protection, and/or screen occur Covert states the scarce fluorine protection of compressor, and/or sends overload of compressor protection alarm, and/or the out of service and compressor Connected load.
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| CN107560100B (en) * | 2017-08-09 | 2019-10-01 | 宁波奥克斯电气股份有限公司 | The control method of air conditioner coolant not foot protection |
| JP6696533B2 (en) * | 2018-06-22 | 2020-05-20 | ダイキン工業株式会社 | Refrigeration equipment |
| CN110701727B (en) * | 2018-07-09 | 2023-03-17 | 开利公司 | Method and system for detecting faults in an HVAC system and memory |
| CN109520082B (en) * | 2018-11-08 | 2020-06-05 | 广东美的制冷设备有限公司 | Air conditioner control method, air conditioner and computer readable storage medium |
| CN110398022B (en) * | 2019-08-02 | 2020-07-31 | 宁波奥克斯电气股份有限公司 | Air conditioner overload protection judgment method and device and air conditioner |
| CN110595015B (en) * | 2019-09-25 | 2020-12-11 | 珠海格力电器股份有限公司 | Adjusting method and device of frequency conversion equipment |
| CN110588689B (en) * | 2019-11-14 | 2020-02-07 | 新誉轨道交通科技有限公司 | Detection method and related device for protection fault of air conditioner compressor |
| CN112393377A (en) * | 2020-11-16 | 2021-02-23 | 珠海格力电器股份有限公司 | Fault judgment method and air conditioner |
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| JP2000227074A (en) * | 1999-02-04 | 2000-08-15 | Matsushita Electric Ind Co Ltd | Drive control method and device for compressor |
| KR20070119272A (en) * | 2006-06-14 | 2007-12-20 | 삼성전자주식회사 | Air conditioner and control method thereof |
| JP4842855B2 (en) * | 2007-02-22 | 2011-12-21 | シャープ株式会社 | Air conditioner |
| CN103134142B (en) * | 2013-02-27 | 2015-05-20 | 四川长虹空调有限公司 | Method for detecting complete blockage of air conditioning system |
| CN105066370B (en) * | 2015-09-02 | 2018-04-17 | 珠海格力电器股份有限公司 | Overload of compressor protects control method and device and air conditioner |
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