CN108195026A - Defrosting control method, control device, air conditioner and readable storage medium storing program for executing - Google Patents
Defrosting control method, control device, air conditioner and readable storage medium storing program for executing Download PDFInfo
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- CN108195026A CN108195026A CN201711390282.0A CN201711390282A CN108195026A CN 108195026 A CN108195026 A CN 108195026A CN 201711390282 A CN201711390282 A CN 201711390282A CN 108195026 A CN108195026 A CN 108195026A
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Abstract
The present invention proposes a kind of defrosting control method, control device, air conditioner and readable storage medium storing program for executing, wherein, defrosting control method includes：After detecting and entering defrost pattern, according to preset detection cycle, detect respectively in outdoor heat exchanger flow path it is cold go out temperature and compressor delivery temperature；According to the delivery temperature detected in each detection cycle with it is cold go out temperature determine the corresponding defrost trend temperature difference；Detect the tendency relationship between the first defrost trend temperature difference and the second defrost trend temperature difference, to perform subsequent defrosting operation according to institute's tendency relationship, wherein, the first defrost trend temperature difference is the defrost trend temperature difference determining after the completion of the current detection period, second defrost temperature passes through technical scheme of the present invention for the defrost trend temperature difference determining after the completion of a upper detection cycle, realize defrosting operation controllability, the probability that air-conditioner outdoor unit still carries out defrosting operation after defrost is reduced, so as to reduce the energy attenuation caused by frostless defrosting operation.
Description
Technical field
The present invention relates to art of heat pumps, in particular to a kind of defrosting control method, a kind of defrosting control device, one
Kind air conditioner and a kind of computer readable storage medium.
Background technology
In the relevant technologies, air-conditioner outdoor unit often will appear the clean still air-conditioner outdoor unit of defrost still in defrost pattern
Situation, there is frostless defrost, and according to control process in export, which can continue a period of time, be lacked there are following
It falls into：
(1) heat efficiency of entire air-conditioning system is affected；
(2) or even the frostless defrost time can affect very much the normal use of user long.
Invention content
At least one in order to solve the above-mentioned technical problem, it is an object of the present invention to provide a kind of defrosting control sides
Method.
It is another object of the present invention to provide a kind of defrosting control devices.
It is yet a further object of the present invention to provide a kind of air conditioners.
A further object of the present invention is to provide a kind of computer readable storage medium.
To achieve these goals, the embodiment of first aspect present invention proposes a kind of defrosting control method, including：
After detection enters defrost pattern, according to preset detection cycle, detect respectively in outdoor heat exchanger flow path it is cold go out temperature and pressure
The delivery temperature of contracting machine；According to the delivery temperature detected in each detection cycle with it is cold go out temperature determine corresponding defrost trend
The temperature difference；The tendency relationship between the first defrost trend temperature difference and the second defrost trend temperature difference is detected, to be held according to institute's tendency relationship
The subsequent defrosting operation of row, wherein, the first defrost trend temperature difference is the defrost trend temperature difference determining after the completion of the current detection period,
Second defrost temperature is the defrost trend temperature difference determining after the completion of a upper detection cycle.
In the technical scheme, after the completion of a detection cycle, by acquire respectively outdoor heat exchanger flow path it is cold go out
The delivery temperature of temperature and compressor, by delivery temperature and it is cold go out temperature between difference be determined as defrost trend temperature,
The refrigerant characterized by defrost trend temperature in heat exchanger cools down discharged thermal energy, so as to detect heat exchanger defrosting institute
The refrigerant thermal discharge needed shows that defrosting operation does not complete when still increasing after entering next cycle or with maintaining an equal level before,
When detecting that the refrigerant thermal discharge needed for heat exchanger defrosting gradually increases or is less, show that defrosting operation is nearly completed, at this time may be used
To determine corresponding defrosting operation step according to tendency relationship, to realize defrosting operation controllability, reduce air-conditioner outdoor unit and exist
The probability of defrosting operation is still carried out after defrost, so as to reduce the energy attenuation caused by frostless defrosting operation.
Specifically, under the heating operation mode of air conditioner, when detection receives defrost instruction, continuing heating operation
While pattern, control outdoor unit enters defrost pattern.
Wherein, detection cycle can be 5s, 10s etc..
In addition, the defrosting control method in above-described embodiment provided by the invention can also have following supplementary technology spy
Sign：
In the above-mentioned technical solutions, it is preferable that detection outdoor heat exchanger flow path in it is cold go out temperature, specifically include following step
Suddenly：Real-time refrigerant temperature at multiple flowing path outlets of synchronous acquisition outdoor heat exchanger respectively；By the refrigerant temperature of temperature value minimum
Degree be determined as it is cold go out temperature.
In the technical scheme, by by the refrigerant temperature in the exit of temperature value minimum be determined as it is cold go out temperature, each
The size of the outlet refrigerant temperature of heat exchanging pipe corresponds to the defrost degree of the heat exchanging pipe, and refrigerant temperature is lower to show current frosting
Degree it is more serious, using the refrigerant temperature in the exit of temperature value minimum as it is cold go out temperature, can ensure that the temperature is corresponding
After the completion of heat exchanging pipe defrosting operation, other heat exchanging pipes have completed complete defrost.
In any of the above-described technical solution, it is preferable that the detection first defrost trend temperature difference and the second defrost trend temperature difference it
Between tendency relationship, to perform subsequent defrosting operation according to institute tendency relationship, specifically include following steps：Detecting first
When the defrost trend temperature difference is less than the second defrost trend temperature difference, the temperature between the first defrost trend temperature difference and fiducial temperature threshold value is detected
Poor relationship, with according to temperature difference relationship, it is determined whether perform defrosting operation；Detecting that the first defrost trend temperature difference is greater than or equal to
During the second defrost trend temperature difference, control continues to execute defrosting operation control and continues to execute defrosting operation, to continue through detection
After the duration in period, tendency relationship is detected again.
In the technical scheme, by the way that the first defrost trend temperature difference and the second defrost trend temperature difference are compared, and
After detecting that the first defrost trend temperature difference is less than the second defrost trend temperature difference, the first defrost trend temperature difference is further detected with presetting
Relationship between temperature difference threshold determines completed defrost degree, to perform the change of next step according to completed defrost degree
Frost operation, further to promote the accuracy of defrosting operation control.
In any of the above-described technical solution, it is preferable that according to temperature difference relationship, it is determined whether continue to execute defrosting operation, have
Body includes the following steps：When detecting that the first defrost trend temperature difference is less than fiducial temperature threshold value, outdoor heat exchanger flow path is acquired
The refrigerant temperature of the specified location of upper intermediate region, using as cold middle temperature；Detecting cold middle temperature more than preset temperature
During threshold value, control terminates defrosting operation；When detecting that cold middle temperature is less than or equal to preset temperature threshold, control continues to execute
Defrosting operation.
In the technical scheme, by when detecting that the first defrost trend temperature difference is less than fiducial temperature threshold value, showing to work as
Preceding defrosting operation is further towards the critical point for completing defrosting operation, at this time by further detecting cold middle temperature and default temperature
The relationship between threshold value is spent, to further determine whether to have completed defrosting operation, preset temperature threshold characterizes outdoor heat exchanger
Fin on without frosting, terminate defrosting operation to control by controlling compressor out of service at this time, avoid air-conditioning
Outdoor unit still carries out defrosting operation after defrost, and efficiency caused by further to avoid compressor continuous service declines
Subtract.
In any of the above-described technical solution, it is preferable that further include：Detecting that the first defrost trend temperature difference is greater than or equal to
During fiducial temperature threshold value, control continues to execute defrosting operation.
In the technical scheme, when detecting that the first defrost trend temperature difference is greater than or equal to fiducial temperature threshold value, explanation
The highly exothermic liquid refrigerants become at flowing path outlet of gaseous coolant discharged from compressor, so as to show outdoor heat exchanger
Fin is there is still a need for amount of heat defrost, by continuing to execute defrosting operation, to continue heat release, until the first defrost trend temperature difference is small
In fiducial temperature threshold value, so as to ensure that being smoothed out for defrosting operation process.
In any of the above-described technical solution, it is preferable that before detection enters defrost pattern, further include：Acquire air-conditioner outdoor unit
Environment temperature；According to the temperature difference threshold that environment temperature amendment prestores, to obtain fiducial temperature threshold value；And/or according to environment temperature
Degree corrects the temperature threshold to prestore, to obtain preset temperature threshold.
In the technical scheme, by acquiring environment temperature, to determine the ambient condition residing for outdoor heat exchanger, environment temperature
Degree is different, and pressure at expulsion also can be different, and corresponding condensation temperature is also different, so as to make fiducial temperature threshold value and preset temperature threshold
Also fluctuation is had, by being operated according to corresponding correct of environment temperature execution, fiducial temperature threshold value is further promoted and/or presets
The accuracy of temperature threshold setting, further to promote the accuracy of defrost process control.
The embodiment of second aspect of the present invention proposes a kind of defrosting control device, including：Detection unit, for detecting
Into after defrost pattern, according to preset detection cycle, detect respectively in the outdoor heat exchanger flow path in each period it is cold go out
The delivery temperature of temperature and compressor；Determination unit, with for according to the delivery temperature detected in each detection cycle with it is cold
Go out temperature and determine the corresponding defrost trend temperature difference；Detection unit is additionally operable to：The first defrost trend temperature difference is detected with the second defrost to become
Tendency relationship between the gesture temperature difference, to perform subsequent defrosting operation according to institute's tendency relationship, wherein, the first defrost trend temperature difference
For the defrost trend temperature difference determining after the completion of the current detection period, the second defrost temperature determines after the completion for a upper detection cycle
The defrost trend temperature difference.
In the technical scheme, after the completion of a detection cycle, by acquire respectively outdoor heat exchanger flow path it is cold go out
The delivery temperature of temperature and compressor, by delivery temperature and it is cold go out temperature between difference be determined as defrost trend temperature,
The refrigerant characterized by defrost trend temperature in heat exchanger cools down discharged thermal energy, so as to detect heat exchanger defrosting institute
The refrigerant thermal discharge needed shows that defrosting operation does not complete when still increasing after entering next cycle or with maintaining an equal level before,
When detecting that the refrigerant thermal discharge needed for heat exchanger defrosting gradually increases or is less, show that defrosting operation is nearly completed, at this time may be used
To determine corresponding defrosting operation step according to tendency relationship, to realize defrosting operation controllability, reduce air-conditioner outdoor unit and exist
The probability of defrosting operation is still carried out after defrost, so as to reduce the energy attenuation caused by frostless defrosting operation.
Specifically, under the heating operation mode of air conditioner, when detection receives defrost instruction, continuing heating operation
While pattern, control outdoor unit enters defrost pattern.
Wherein, detection cycle can be 5s, 10s etc..
In the above-mentioned technical solutions, it is preferable that further include：Collecting unit, for distinguishing synchronous acquisition outdoor heat exchanger
Real-time refrigerant temperature at multiple flowing path outlets；Determination unit is additionally operable to：By the refrigerant temperature of temperature value minimum be determined as it is cold go out
Temperature.
In the technical scheme, by by the refrigerant temperature in the exit of temperature value minimum be determined as it is cold go out temperature, each
The size of the outlet refrigerant temperature of heat exchanging pipe corresponds to the defrost degree of the heat exchanging pipe, and refrigerant temperature is lower to show current frosting
Degree it is more serious, using the refrigerant temperature in the exit of temperature value minimum as it is cold go out temperature, can ensure that the temperature is corresponding
After the completion of heat exchanging pipe defrosting operation, other heat exchanging pipes have completed complete defrost.
In any of the above-described technical solution, it is preferable that detection unit is additionally operable to：Detecting that the first defrost trend temperature difference is small
When the second defrost trend temperature difference, the temperature difference relationship between the first defrost trend temperature difference and fiducial temperature threshold value is detected, with basis
Temperature difference relationship, it is determined whether perform defrosting operation；Detecting the first defrost trend temperature difference more than or equal to the second defrost trend
During the temperature difference, control continues to execute defrosting operation control and continues to execute defrosting operation, with after the duration of detection cycle is continued through,
Again tendency relationship is detected.
In the technical scheme, by the way that the first defrost trend temperature difference and the second defrost trend temperature difference are compared, and
After detecting that the first defrost trend temperature difference is less than the second defrost trend temperature difference, the first defrost trend temperature difference is further detected with presetting
Relationship between temperature difference threshold determines completed defrost degree, to perform the change of next step according to completed defrost degree
Frost operation, further to promote the accuracy of defrosting operation control.
In any of the above-described technical solution, it is preferable that collecting unit is additionally operable to：Detecting that the first defrost trend temperature difference is small
When fiducial temperature threshold value, the refrigerant temperature of the specified location of intermediate region on outdoor heat exchanger flow path is acquired, using as cold
Middle temperature；Defrosting control device further includes：Control unit, for when detecting that cold middle temperature is more than preset temperature threshold, controlling
System terminates defrosting operation；Control unit is additionally operable to：Detect cold middle temperature be less than or equal to preset temperature threshold when, control after
It is continuous to perform defrosting operation.
In the technical scheme, by when detecting that the first defrost trend temperature difference is less than fiducial temperature threshold value, showing to work as
Preceding defrosting operation is further towards the critical point for completing defrosting operation, at this time by further detecting cold middle temperature and default temperature
The relationship between threshold value is spent, to further determine whether to have completed defrosting operation, preset temperature threshold characterizes outdoor heat exchanger
Fin on without frosting, terminate defrosting operation to control by controlling compressor out of service at this time, avoid air-conditioning
Outdoor unit still carries out defrosting operation after defrost, and efficiency caused by further to avoid compressor continuous service declines
Subtract.
In any of the above-described technical solution, it is preferable that control unit is additionally operable to：Detecting that the first defrost trend temperature difference is big
When fiducial temperature threshold value, control continues to execute defrosting operation.
In the technical scheme, when detecting that the first defrost trend temperature difference is greater than or equal to fiducial temperature threshold value, explanation
The highly exothermic liquid refrigerants become at flowing path outlet of gaseous coolant discharged from compressor, so as to show outdoor heat exchanger
Fin is there is still a need for amount of heat defrost, by continuing to execute defrosting operation, to continue heat release, until the first defrost trend temperature difference is small
In fiducial temperature threshold value, so as to ensure that being smoothed out for defrosting operation process.
In any of the above-described technical solution, it is preferable that collecting unit is additionally operable to：Acquire the environment temperature of air-conditioner outdoor unit；
Defrosting control device further includes：Amending unit, for the temperature difference threshold to be prestored according to environment temperature amendment, to obtain fiducial temperature
Threshold value；And/or amending unit is additionally operable to：According to the temperature threshold that environment temperature amendment prestores, to obtain preset temperature threshold.
In the technical scheme, by acquiring environment temperature, to determine the ambient condition residing for outdoor heat exchanger, environment temperature
Degree is different, and pressure at expulsion also can be different, and corresponding condensation temperature is also different, so as to make fiducial temperature threshold value and preset temperature threshold
Also fluctuation is had, by being operated according to corresponding correct of environment temperature execution, fiducial temperature threshold value is further promoted and/or presets
The accuracy of temperature threshold setting, further to promote the accuracy of defrost process control.
The third aspect of the present invention proposes a kind of air conditioner, and air conditioner includes processor, and processor is used to perform storage
Realized during the computer program stored in device as in above-mentioned technical proposal the step of the defrosting control method of any one and/or on
State the defrosting control device of any one in technical solution.
The fourth aspect of the present invention proposes a kind of computer readable storage medium, is stored thereon with computer program, meter
The step of defrosting control method of any one in such as above-mentioned technical proposal is realized when calculation machine program is executed by processor.
According to the technique and scheme of the present invention, outer machine frost base is judged according to the variation tendency of the defrost trend temperature difference by (1)
The complete decision logic of this change；(2) accurately judge that outer machine frost completion is complete according to reference to the defrost trend temperature difference, cold middle temperature value
Decision logic；(3) define by with reference to it is cold go out the difference of temperature and delivery temperature, cold middle temperature value accurately judge outer machine frost
The complete decision logic of completion accurately avoids the generation of frostless defrost phenomenon.
The additional aspect and advantage of the present invention will become practice apparent or by the present invention in following description section
Recognize.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Significantly and it is readily appreciated that, wherein：
Fig. 1 shows the schematic flow diagram of defrosting control method according to an embodiment of the invention；
Fig. 2 shows the schematic block diagrams of defrosting control device according to an embodiment of the invention；
Fig. 3 shows the schematic flow diagram of defrosting control method according to another embodiment of the invention；
Fig. 4 shows the schematic block diagram of air conditioner according to an embodiment of the invention.
Specific embodiment
It is to better understand the objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specific real
Mode is applied the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be implemented using other different from other modes described here, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Referring to the defrosting control method of Fig. 1 descriptions according to some embodiments of the invention.
As shown in Figure 1, defrosting control method according to an embodiment of the invention, including：Step 102, in detection entranceization
After white pattern, according to preset detection cycle, detect respectively in outdoor heat exchanger flow path it is cold go out temperature and compressor exhaust
Temperature；Step 104, according to the delivery temperature detected in each detection cycle with it is cold go out temperature determine corresponding defrost trend temperature
Difference；Step 106, the tendency relationship between the first defrost trend temperature difference and the second defrost trend temperature difference is detected, with according to institute's tendency
Relationship performs subsequent defrosting operation, wherein, the first defrost trend temperature difference becomes for defrost determining after the completion of the current detection period
The gesture temperature difference, the second defrost temperature are the defrost trend temperature difference determining after the completion of a upper detection cycle.
In this embodiment, after the completion of a detection cycle, by acquire respectively outdoor heat exchanger flow path it is cold go out temperature
Degree and the delivery temperature of compressor, by delivery temperature and it is cold go out temperature between difference be determined as defrost trend temperature, lead to
The refrigerant crossed in defrost trend temperature characterization heat exchanger cools down discharged thermal energy, so as to detect needed for heat exchanger defrosting
Refrigerant thermal discharge enter next cycle after still increase or with before maintain an equal level when, show that defrosting operation does not complete, examining
When measuring the refrigerant thermal discharge needed for heat exchanger defrosting and gradually increasing or is less, show that defrosting operation is nearly completed, it at this time can be with
Corresponding defrosting operation step is determined according to tendency relationship, to realize defrosting operation controllability, reduces air-conditioner outdoor unit
The probability of defrosting operation is still carried out after through defrost, so as to reduce the energy attenuation caused by frostless defrosting operation.
Specifically, under the heating operation mode of air conditioner, when detection receives defrost instruction, continuing heating operation
While pattern, control outdoor unit enters defrost pattern.
Wherein, detection cycle can be 5s, 10s etc..
In addition, outdoor heat exchanger have it is multiple heat exchange flow path when, for it is cold go out temperature acquisition mode, can only acquire
The refrigerant temperature at a tube outlet is specified, multiple refrigerant temperatures can also be acquired and be averaged, can also be acquired multiple cold
Matchmaker's temperature is minimized.
Subsequent defrosting operation is performed according to tendency relationship, can determine to correspond to by continuing the detection of temperature change
Defrosting operation step, compressor can also be controlled to continue to run with and perform duration and complete defrosting operation.
Specifically, under defrost pattern, compressor cycle operation, by controlling the access of four-way valve, by compressor pressure
The high temperature and pressure figure refrigerant generated after contracting is imported in the flow path of outdoor heat exchanger, and outdoor heat exchanger cools down heat release by refrigerator
Realize that the fin on heat exchanging device carries out defrost into normal temperature high voltage liquid, indoor wind turbine is not run at this time, to avoid to interior
Refrigeration.
In addition, the defrosting control method in above-described embodiment provided by the invention can also have following supplementary technology spy
Sign：
In the above embodiment, it is preferable that detection outdoor heat exchanger flow path in it is cold go out temperature, specifically include following step
Suddenly：Real-time refrigerant temperature at multiple flowing path outlets of synchronous acquisition outdoor heat exchanger respectively；By the refrigerant temperature of temperature value minimum
Degree be determined as it is cold go out temperature.
In this embodiment, by by the refrigerant temperature in the exit of temperature value minimum be determined as it is cold go out temperature, Mei Gehuan
The size of the outlet refrigerant temperature of pipe line corresponds to the defrost degree of the heat exchanging pipe, and refrigerant temperature is lower to show current frosting
Degree is more serious, using the refrigerant temperature in the exit of temperature value minimum as it is cold go out temperature, can ensure that the temperature is corresponding and change
After the completion of pipe line defrosting operation, other heat exchanging pipes have completed complete defrost.
In any of the above-described embodiment, it is preferable that between the first defrost trend temperature difference of detection and the second defrost trend temperature difference
Tendency relationship, to perform subsequent defrosting operation according to institute tendency relationship, specifically include following steps：Detecting the first change
When the white trend temperature difference is less than the second defrost trend temperature difference, the temperature difference between the first defrost trend temperature difference and fiducial temperature threshold value is detected
Relationship, with according to temperature difference relationship, it is determined whether perform defrosting operation；Detecting that the first defrost trend temperature difference is greater than or equal to the
During the two defrost trend temperature difference, control continues to execute defrosting operation control and continues to execute defrosting operation, to continue through detection week
After the duration of phase, tendency relationship is detected again.
In this embodiment, by the way that the first defrost trend temperature difference and the second defrost trend temperature difference are compared, and examining
The first defrost trend temperature difference is measured less than after the second defrost trend temperature difference, further detects the first defrost trend temperature difference and default temperature
Relationship between poor threshold value determines completed defrost degree, to perform the defrost of next step according to completed defrost degree
Operation, further to promote the accuracy of defrosting operation control.
Wherein, after detecting that the first defrost trend temperature difference is less than the second defrost trend temperature difference, knot can also be directly controlled
Beam defrosting operation.
In addition, fiducial temperature threshold value can be predefined by testing, and it is stored in the memory being connect with control chip
In, it can also be determined further combined with the environment temperature of current outdoor.
In any of the above-described embodiment, it is preferable that according to temperature difference relationship, it is determined whether continue to execute defrosting operation, specifically
Include the following steps：When detecting that the first defrost trend temperature difference is less than fiducial temperature threshold value, acquire on outdoor heat exchanger flow path
The refrigerant temperature of the specified location of intermediate region, using as cold middle temperature；Detecting cold middle temperature more than preset temperature threshold
During value, control terminates defrosting operation；When detecting that cold middle temperature is less than or equal to preset temperature threshold, continuing to execute is controlled
Frost operation.
In this embodiment, it is current by when detecting that the first defrost trend temperature difference is less than fiducial temperature threshold value, showing
Defrosting operation further towards complete defrosting operation critical point, at this time by further detecting cold middle temperature and preset temperature
Relationship between threshold value, to further determine whether to have completed defrosting operation, preset temperature threshold characterizes outdoor heat exchanger
Terminate defrosting operation without frosting on fin to control by controlling compressor out of service at this time, avoid air conditioning chamber
Outer machine still carries out defrosting operation after defrost, and efficiency caused by further to avoid compressor continuous service declines
Subtract.
Specifically, during defrosting operation, cold middle temperature is gradually increasing, when rising to preset temperature threshold,
It then can be shown that defrosting operation has been completed.
In addition, preset temperature threshold can be predefined by testing, and it is stored in the memory being connect with control chip
In, it can also be determined further combined with the environment temperature of current outdoor.
In any of the above-described embodiment, it is preferable that further include：Detecting that it is pre- that the first defrost trend temperature difference is greater than or equal to
If during temperature difference threshold, control continues to execute defrosting operation.
In this embodiment, detect the first defrost trend temperature difference be greater than or equal to fiducial temperature threshold value when, illustrate from
The highly exothermic liquid refrigerants become at flowing path outlet of gaseous coolant of compressor discharge, so as to show the wing of outdoor heat exchanger
Piece is there is still a need for amount of heat defrost, by continuing to execute defrosting operation, to continue heat release, until the first defrost trend temperature difference is less than
Fiducial temperature threshold value, so as to ensure that being smoothed out for defrosting operation process.
In any of the above-described embodiment, it is preferable that before detection enters defrost pattern, further include：Acquire air-conditioner outdoor unit
Environment temperature；According to the temperature difference threshold that environment temperature amendment prestores, to obtain fiducial temperature threshold value；And/or according to environment temperature
The temperature threshold to prestore is corrected, to obtain preset temperature threshold.
In this embodiment, by acquiring environment temperature, to determine the ambient condition residing for outdoor heat exchanger, environment temperature
Difference, pressure at expulsion also can be different, and corresponding condensation temperature is also different, so as to make fiducial temperature threshold value and preset temperature threshold
Fluctuation is had, is operated by performing corresponding correct according to environment temperature, further promotes fiducial temperature threshold value and/or default temperature
The accuracy of threshold value setting is spent, further to promote the accuracy of defrost process control.
As shown in Fig. 2, defrosting control device 200 according to an embodiment of the invention, including：Detection unit 202, for
After detection enters defrost pattern, according to preset detection cycle, detect respectively in the outdoor heat exchanger flow path in each period
It is cold go out temperature and compressor delivery temperature；Determination unit 206, with for according to the exhaust temperature detected in each detection cycle
Degree with it is cold go out temperature determine the corresponding defrost trend temperature difference；Detection unit 202 is additionally operable to：Detect the first defrost trend temperature difference and the
Tendency relationship between the two defrost trend temperature difference, to perform subsequent defrosting operation according to institute's tendency relationship, wherein, the first defrost
The trend temperature difference is the defrost trend temperature difference determining after the completion of the current detection period, and the second defrost temperature is completed for a upper detection cycle
The determining defrost trend temperature difference afterwards.
In this embodiment, after the completion of a detection cycle, by acquire respectively outdoor heat exchanger flow path it is cold go out temperature
Degree and the delivery temperature of compressor, by delivery temperature and it is cold go out temperature between difference be determined as defrost trend temperature, lead to
The refrigerant crossed in defrost trend temperature characterization heat exchanger cools down discharged thermal energy, so as to detect needed for heat exchanger defrosting
Refrigerant thermal discharge enter next cycle after still increase or with before maintain an equal level when, show that defrosting operation does not complete, examining
When measuring the refrigerant thermal discharge needed for heat exchanger defrosting and gradually increasing or is less, show that defrosting operation is nearly completed, it at this time can be with
Corresponding defrosting operation step is determined according to tendency relationship, to realize defrosting operation controllability, reduces air-conditioner outdoor unit
The probability of defrosting operation is still carried out after through defrost, so as to reduce the energy attenuation caused by frostless defrosting operation.
Specifically, under the heating operation mode of air conditioner, when detection receives defrost instruction, continuing heating operation
While pattern, control outdoor unit enters defrost pattern.
Wherein, detection cycle can be 5s, 10s etc..
Wherein, outdoor heat exchanger have it is multiple heat exchange flow path when, for it is cold go out temperature acquisition mode, can only acquire
The refrigerant temperature at a tube outlet is specified, multiple refrigerant temperatures can also be acquired and be averaged, can also be acquired multiple cold
Matchmaker's temperature is minimized.
Subsequent defrosting operation is performed according to tendency relationship, can determine to correspond to by continuing the detection of temperature change
Defrosting operation step, compressor can also be controlled to continue to run with and perform duration and complete defrosting operation.
Specifically, under defrost pattern, compressor cycle operation, by controlling the access of four-way valve, by compressor pressure
The high temperature and pressure figure refrigerant generated after contracting is imported in the flow path of outdoor heat exchanger, and outdoor heat exchanger cools down heat release by refrigerator
Realize that the fin on heat exchanging device carries out defrost into normal temperature high voltage liquid, indoor wind turbine is not run at this time, to avoid to interior
Refrigeration.
In the above embodiment, it is preferable that it further includes：Collecting unit 206, for distinguishing synchronous acquisition outdoor heat exchanger
Real-time refrigerant temperature at multiple flowing path outlets；Determination unit 204 is additionally operable to：The refrigerant temperature of temperature value minimum is determined as cold
Go out temperature.
In this embodiment, by by the refrigerant temperature in the exit of temperature value minimum be determined as it is cold go out temperature, Mei Gehuan
The size of the outlet refrigerant temperature of pipe line corresponds to the defrost degree of the heat exchanging pipe, and refrigerant temperature is lower to show current frosting
Degree is more serious, using the refrigerant temperature in the exit of temperature value minimum as it is cold go out temperature, can ensure that the temperature is corresponding and change
After the completion of pipe line defrosting operation, other heat exchanging pipes have completed complete defrost.
In any of the above-described embodiment, it is preferable that detection unit 206 is additionally operable to：Detecting the first defrost trend temperature difference
During less than the second defrost trend temperature difference, the temperature difference relationship between the first defrost trend temperature difference and fiducial temperature threshold value is detected, with root
According to temperature difference relationship, it is determined whether perform defrosting operation；Detecting that the first defrost trend temperature difference becomes more than or equal to the second defrost
During the gesture temperature difference, control continues to execute defrosting operation control and continues to execute defrosting operation, in the duration for continuing through detection cycle
Afterwards, tendency relationship is detected again.
In this embodiment, by the way that the first defrost trend temperature difference and the second defrost trend temperature difference are compared, and examining
The first defrost trend temperature difference is measured less than after the second defrost trend temperature difference, further detects the first defrost trend temperature difference and default temperature
Relationship between poor threshold value determines completed defrost degree, to perform the defrost of next step according to completed defrost degree
Operation, further to promote the accuracy of defrosting operation control.
Wherein, after detecting that the first defrost trend temperature difference is less than the second defrost trend temperature difference, knot can also be directly controlled
Beam defrosting operation.
In addition, fiducial temperature threshold value can be predefined by testing, and it is stored in the memory being connect with control chip
In, it can also be determined further combined with the environment temperature of current outdoor.
In any of the above-described embodiment, it is preferable that collecting unit 206 is additionally operable to：Detecting the first defrost trend temperature difference
During less than fiducial temperature threshold value, acquire outdoor heat exchanger flow path on intermediate region specified location refrigerant temperature, using as
Cold middle temperature；Defrosting control device 200 further includes：Control unit 208, for detecting cold middle temperature more than preset temperature threshold
During value, control terminates defrosting operation；Control unit 208 is additionally operable to：Detecting cold middle temperature less than or equal to preset temperature threshold
During value, control continues to execute defrosting operation.
In this embodiment, it is current by when detecting that the first defrost trend temperature difference is less than fiducial temperature threshold value, showing
Defrosting operation further towards complete defrosting operation critical point, at this time by further detecting cold middle temperature and preset temperature
Relationship between threshold value, to further determine whether to have completed defrosting operation, preset temperature threshold characterizes outdoor heat exchanger
Terminate defrosting operation without frosting on fin to control by controlling compressor out of service at this time, avoid air conditioning chamber
Outer machine still carries out defrosting operation after defrost, and efficiency caused by further to avoid compressor continuous service declines
Subtract.
Specifically, during defrosting operation, cold middle temperature is gradually increasing, when rising to preset temperature threshold,
It then can be shown that defrosting operation has been completed.
In addition, preset temperature threshold can be predefined by testing, and it is stored in the memory being connect with control chip
In, it can also be determined further combined with the environment temperature of current outdoor.
In any of the above-described embodiment, it is preferable that control unit 208 is additionally operable to：Detecting the first defrost trend temperature difference
During more than or equal to fiducial temperature threshold value, control continues to execute defrosting operation.
In this embodiment, detect the first defrost trend temperature difference be greater than or equal to fiducial temperature threshold value when, illustrate from
The highly exothermic liquid refrigerants become at flowing path outlet of gaseous coolant of compressor discharge, so as to show the wing of outdoor heat exchanger
Piece is there is still a need for amount of heat defrost, by continuing to execute defrosting operation, to continue heat release, until the first defrost trend temperature difference is less than
Fiducial temperature threshold value, so as to ensure that being smoothed out for defrosting operation process.
In any of the above-described embodiment, it is preferable that collecting unit 202 is additionally operable to：Acquire the environment temperature of air-conditioner outdoor unit；
Defrosting control device 200 further includes：Amending unit 210, it is pre- to obtain for the temperature difference threshold to be prestored according to environment temperature amendment
If temperature difference threshold；And/or amending unit 210 is additionally operable to：According to the temperature threshold that environment temperature amendment prestores, to obtain default temperature
Spend threshold value.
In this embodiment, by acquiring environment temperature, to determine the ambient condition residing for outdoor heat exchanger, environment temperature
Difference, pressure at expulsion also can be different, and corresponding condensation temperature is also different, so as to make fiducial temperature threshold value and preset temperature threshold
Fluctuation is had, is operated by performing corresponding correct according to environment temperature, further promotes fiducial temperature threshold value and/or default temperature
The accuracy of threshold value setting is spent, further to promote the accuracy of defrost process control.
Fig. 3 shows the schematic flow diagram of defrosting control device according to another embodiment of the invention.
As shown in figure 3, defrosting control device according to another embodiment of the invention, including：Step 302, it is detecting
To the amount of cycles n that when entering defrost pattern, record temperature detecting operation is run, wherein each cycle duration is a；Step 304,
After a*n durations, the refrigerant temperature at m flowing path outlet in outdoor heat exchanger is being detected, and minimum refrigerant temperature is determined
For it is cold go out temperature T1；Step 306, the delivery temperature T2 of compressor is acquired；Step 308, △ T=T2-T1 are calculated, and △ T are determined
Justice is the defrost trend temperature difference；Step 310, judge △ Tn<△Tn-1, when judging result are "Yes", 312 are entered step, is being judged
When being as a result "No", 318 are entered step；Step 312, it determines that air-conditioner outdoor unit defrost is basically completed, and continues to judge △ Tn<A,
When testing result is "Yes", 314 are entered step, when testing result is "No", enters step 318；Step 314, it acquires cold
Middle temperature T3, and continue to judge T3>B when judging result is "Yes", enters step 316, when judging result is "No", into
Enter step 318；Step 316, it determines to complete defrosting operation, and control and exit defrost pattern, step 318, continues defrosting operation, and
Into the temperature detecting operation in next period.
Wherein, n is a variable, and characterization is the detection cycle being presently in, and n-1 then characterizes a detection week
Phase.
As shown in figure 4, air conditioner 40 according to an embodiment of the invention, air conditioner 40 includes processor 404, processor
404 realize when being used to perform the computer program stored in memory 402 such as the defrosting control of any one in above-described embodiment
The step of method.
Computer readable storage medium according to an embodiment of the invention is stored thereon with computer program, computer journey
The step of defrosting control method of any one in such as above-described embodiment is realized when sequence is executed by processor.
The steps in the embodiment of the present invention can be sequentially adjusted, merged and deleted according to actual needs.
Unit in device of the embodiment of the present invention can be combined, divided and deleted according to actual needs.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium include read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory,
RAM), programmable read only memory (Programmable Read-only Memory, PROM), erasable programmable is read-only deposits
Reservoir (Erasable Programmable Read Only Memory, EPROM), disposable programmable read-only memory (One-
Time Programmable Read-Only Memory, OTPROM), the electronics formula of erasing can make carbon copies read-only memory
(Electrically-Erasable Programmable Read-Only Memory, EEPROM), CD-ROM (Compact
Disc Read-Only Memory, CD-ROM) or other disk storages, magnetic disk storage, magnetic tape storage or can
For carrying or storing any other computer-readable medium of data.
The embodiment of the present invention is described in detail above in association with attached drawing, it is contemplated that reduction frostlessization how in the relevant technologies
The technical issues of white time, the present invention proposes a kind of new defrosting control scheme, by acquiring outdoor heat exchanger flow path respectively
It is cold go out temperature and compressor delivery temperature, by delivery temperature and it is cold go out temperature between difference be determined as defrost trend
Temperature, the refrigerant characterized by defrost trend temperature in heat exchanger cools down discharged thermal energy, so as to detect heat exchanger
Refrigerant thermal discharge needed for defrost shows that defrosting operation is not complete when still increasing after entering next cycle or with maintaining an equal level before
Into, when detecting that the refrigerant thermal discharge needed for heat exchanger defrosting gradually increases or is less, show that defrosting operation is nearly completed, this
When corresponding defrosting operation step can be determined according to tendency relationship, to realize defrosting operation controllability, reduce outside air conditioning chamber
Machine still carries out the probability of defrosting operation after defrost, declines so as to reduce the energy caused by frostless defrosting operation
Subtract.
It these are only the preferred embodiment of the present invention, be not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification for all within the spirits and principles of the present invention, being made,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (14)
1. a kind of defrosting control method, suitable for air-conditioner outdoor unit, the air-conditioner outdoor unit includes compressor and outdoor heat exchanger,
It is characterized in that, the defrosting control method includes：
After detecting into defrost pattern, according to preset detection cycle, detect respectively cold in the outdoor heat exchanger flow path
Go out temperature and the delivery temperature of the compressor；
According to the delivery temperature detected in each detection cycle with it is described it is cold go out temperature determine that corresponding defrost becomes
The gesture temperature difference；
The tendency relationship between the first defrost trend temperature difference and the second defrost trend temperature difference is detected, to be held according to the tendency relationship
The subsequent defrosting operation of row,
Wherein, the first defrost trend temperature difference is the defrost trend temperature difference determining after the completion of the current detection period, described
Second defrost temperature is the defrost trend temperature difference determining after the completion of a upper detection cycle.
2. defrosting control method according to claim 1, which is characterized in that cold in the detection outdoor heat exchanger flow path
Go out temperature, specifically include following steps：
Real-time refrigerant temperature described in synchronous acquisition at multiple flowing path outlets of outdoor heat exchanger respectively；
By the refrigerant temperature of temperature value minimum be determined as it is described it is cold go out temperature.
3. defrosting control method according to claim 2, which is characterized in that the first defrost trend temperature difference of the detection and the
Tendency relationship between the two defrost trend temperature difference to perform subsequent defrosting operation according to institute's tendency relationship, specifically includes following
Step：
When detecting that the first defrost trend temperature difference is less than the second defrost trend temperature difference, detect first defrost and become
Temperature difference relationship between the gesture temperature difference and fiducial temperature threshold value, with according to the temperature difference relationship, it is determined whether continue to execute defrost behaviour
Make；
When detecting that the first defrost trend temperature difference is greater than or equal to the second defrost trend temperature difference, control continues to execute
Defrosting operation, after the duration for continuing through the detection cycle, to detect the tendency relationship again.
4. defrosting control method according to claim 3, which is characterized in that it is described according to the temperature difference relationship, determine be
It is no to continue to execute defrosting operation, specifically include following steps：
When detecting that the first defrost trend temperature difference is less than the fiducial temperature threshold value, in acquiring on outdoor heat exchanger flow path
Between region specified location refrigerant temperature, using as cold middle temperature；
When detecting that the cold middle temperature is more than preset temperature threshold, control terminates the defrosting operation；
When detecting that the cold middle temperature is less than or equal to the preset temperature threshold, control continues to execute defrosting operation.
5. defrosting control method according to claim 4, which is characterized in that further include：
When detecting that the first defrost trend temperature difference is greater than or equal to the fiducial temperature threshold value, control continues to execute defrost
Operation.
6. defrosting control method according to claim 4 or 5, which is characterized in that before the detection enters defrost pattern, also
Including：
Acquire the environment temperature of the air-conditioner outdoor unit；
According to the temperature difference threshold that the environment temperature amendment prestores, to obtain the fiducial temperature threshold value；And/or
According to the temperature threshold that the environment temperature amendment prestores, to obtain the preset temperature threshold.
7. a kind of defrosting control device, suitable for air-conditioner outdoor unit, the air-conditioner outdoor unit includes compressor and outdoor heat exchanger,
It is characterized in that, the defrosting control device includes：
Detection unit, for after detecting into defrost pattern, according to preset detection cycle, detecting respectively in each period
In the outdoor heat exchanger flow path it is cold go out temperature and the compressor delivery temperature
Determination unit, for according to the delivery temperature detected in each detection cycle with it is described it is cold go out temperature determine
It is corresponding；
The detection unit is additionally operable to：The tendency relationship between the first defrost trend temperature difference and the second defrost trend temperature difference is detected,
To perform subsequent defrosting operation according to the tendency relationship,
Wherein, the first defrost trend temperature difference is the defrost trend temperature difference determining after the completion of the current detection period, described
Second defrost temperature is the defrost trend temperature difference determining after the completion of a upper detection cycle.
8. defrosting control device according to claim 7, which is characterized in that further include：
Collecting unit, for distinguishing the real-time refrigerant temperature at multiple flowing path outlets of outdoor heat exchanger described in synchronous acquisition；
The determination unit is additionally operable to：By the refrigerant temperature of temperature value minimum be determined as it is described it is cold go out temperature.
9. defrosting control device according to claim 8, which is characterized in that
The detection unit is additionally operable to：Detecting the first defrost trend temperature difference less than the second defrost trend temperature difference
When, the temperature difference relationship between the first defrost trend temperature difference and fiducial temperature threshold value is detected, with according to the temperature difference relationship, really
It is fixed whether to perform defrosting operation；
When detecting that the first defrost trend temperature difference is greater than or equal to the second defrost trend temperature difference, control continues to execute
Defrosting operation, after the duration of detection cycle is continued through, to detect the tendency relationship again.
10. defrosting control device according to claim 9, which is characterized in that
The collecting unit is additionally operable to：When detecting that the first defrost trend temperature difference is less than the fiducial temperature threshold value, adopt
Collect the refrigerant temperature of the specified location of intermediate region on outdoor heat exchanger flow path, using as cold middle temperature；
The defrosting control device further includes：
Control unit, for when detecting that the cold middle temperature is more than preset temperature threshold, control to terminate the defrosting operation；
Described control unit is additionally operable to：When detecting that the cold middle temperature is less than or equal to the preset temperature threshold, control
Continue to execute defrosting operation.
11. defrosting control device according to claim 10, which is characterized in that
Described control unit is additionally operable to：Detecting the first defrost trend temperature difference more than or equal to the fiducial temperature threshold value
When, control continues to execute defrosting operation.
12. the defrosting control device according to claim 10 or 11, which is characterized in that
The collecting unit is additionally operable to：Acquire the environment temperature of the air-conditioner outdoor unit；
The defrosting control device further includes：
Amending unit, for the temperature difference threshold to be prestored according to the environment temperature amendment, to obtain the fiducial temperature threshold value；
And/or
The amending unit is additionally operable to：According to the temperature threshold that the environment temperature amendment prestores, to obtain the preset temperature
Threshold value.
13. a kind of air conditioner, which is characterized in that including processor, the processor is used to perform the calculating stored in memory
The step of any one the method in such as claim 1-6 is realized during machine program.
14. a kind of computer readable storage medium is stored thereon with computer program (instruction), it is characterised in that：The calculating
The step of any one the method in such as claim 1-6 is realized when machine program (instruction) is executed by processor.
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| CN201711390282.0A CN108195026B (en) | 2017-12-21 | 2017-12-21 | Defrosting control method, control device, air conditioner and readable storage medium |
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| CN113340029A (en) * | 2020-03-03 | 2021-09-03 | 青岛海尔空调电子有限公司 | Defrosting control method for air conditioner |
| CN114251896A (en) * | 2021-12-24 | 2022-03-29 | 海信（山东）冰箱有限公司 | Refrigerator and defrosting control method thereof |
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