CN104214898A - Air conditioner and defrosting control method and defrosting control system thereof - Google Patents
Air conditioner and defrosting control method and defrosting control system thereof Download PDFInfo
- Publication number
- CN104214898A CN104214898A CN201410438287.6A CN201410438287A CN104214898A CN 104214898 A CN104214898 A CN 104214898A CN 201410438287 A CN201410438287 A CN 201410438287A CN 104214898 A CN104214898 A CN 104214898A
- Authority
- CN
- China
- Prior art keywords
- frequency
- compressor
- defrosting
- air
- conditioner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention provides a defrosting control method for the air conditioner. The defrosting control method for the air conditioner comprises a frequency reducing step: reducing the running frequency of a compressor of the air conditioner when the air conditioner is in a heating mode if the condition that defrosting is needed is detected; a detection step: performing real-time detection on a current waveform state when the compressor runs; a frequency determining step: determining target frequency when the compressor quits low-frequency torque compensation according to the current waveform state; a defrosting step: switching the heating mode into a defrosting mode when the running frequency of the compressor is equal to the target frequency, and boosting the running frequency of the compressor so as to start defrosting. Correspondingly, the invention also provides a defrosting control system of the air conditioner and the air conditioner. Through the technical scheme adopted by the invention, the compressor may not be stopped during defrosting, and the heating effect is improved, so that the reliability of the air conditioner is improved, and the user experience is promoted.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to defrost control system and a kind of air-conditioner of a kind of defrosting control method of air-conditioner, a kind of air-conditioner.
Background technology
Along with the development of air-conditioning technical, the application of convertible frequency air-conditioner is day by day popularized.At low ambient temperatures, convertible frequency air-conditioner is higher than the heating capacity of fixed frequency air conditioner, and in order to improve heating capacity at low ambient temperatures further, a lot of frequency conversion type all have employed the control mode of the compressor not out of service when defrosting mode.Air-conditioner is when entering defrosting mode, and frequency-changeable compressor first carries out down conversion process, and after dropping to low frequency, cross valve commutates, then compressor raising frequency again, starts quickly defrosting again after running high frequency.Adopt and defrost in this way, compressor can be shortened and first shut down and restart the time of raising frequency to the high frequency stage again, thus effectively improve heating capacity.But there is fatal defect in this control mode: when single-rotor compressor mixes down to low-frequency operation, because the pressure in compresser cylinder constantly changes, cause being carried in epitrochanterian moment also constantly to change, and the adjustment action of controller has certain hysteresis quality, the skew of rotor c.g. can make compressor produce mechanical oscillation, particularly when low frequency, the fluctuation of compressor rotary speed can be caused, thus introduce the way of compensated torque at low frequency.But when cross valve switches, because system exists height pressure reduction, suddenly refrigeration mode is switched to from heating mode, pressure imbalance, compensated torque function just opened by compressor this moment, can detect that the current waveform of compressor is in a mess by oscillograph, easily cause compressor cancel closedown, and after compressor restarts, directly can proceed to heating mode, do not carry out defrosting action, after such long-play, frost on outdoor heat exchanger can get more and more, air-conditioning heating effect will seriously be deteriorated, if things go on like this, there will be compressor liquid hammer, finally cause compressor damage.And if carry out cross valve commutation when compressor high frequency operates, system high-low pressure pressure reduction then can be excessive, can cause very large impact to cross valve, affects the service life of cross valve.
Therefore, ensure the reliability of air-conditioner while how not stopping compressor when defrosting, and improve heating effect, become technical problem urgently to be resolved hurrily at present.
Summary of the invention
The present invention, just based on the problems referred to above, proposes a kind of new technical scheme, ensures the reliability of air-conditioner, and improve heating effect when defrosting while can not stopping compressor.
For this reason, one object of the present invention is the defrosting control method proposing a kind of air-conditioner.
Another object of the present invention is the defrost control system proposing a kind of air-conditioner.
Another object of the present invention is to propose a kind of air-conditioner, comprises the defrost control system of above-mentioned air-conditioner.
For achieving the above object, embodiment according to a first aspect of the invention, proposes a kind of defrosting control method of air-conditioner, comprise: down-converting step, when described air-conditioner is in heating mode, needs defrosting if detect, reduce the running frequency of the compressor of described air-conditioner; Detecting step, detects current waveform state during described compressor operating in real time; Frequency determining step, target frequency when determining that described compressor exits low-frequency torque compensation according to described current waveform state; Defrosting step, when the running frequency of described compressor equals described target frequency, switches to defrosting mode by described heating mode, and the running frequency raising described compressor is to start to defrost.
According to the defrosting control method of the embodiment of the present invention, when air-conditioner needs to defrost, compressor starts frequency reducing, and determine target frequency when exiting low-frequency torque compensation according to current waveform during compressor operating, commutating frequency during namely compressor defrosting, when the running frequency of compressor is equal with this commutating frequency, air-conditioner switches to defrosting mode.Like this; compressor need not be stopped just can defrosting; improve heating effect; and when compressor exits low-frequency torque compensation running mode switching; now running current waveform is more stable, can not cause compressor cancel closedown, improves the reliability of air-conditioner; simultaneously because the conversion of compressor mode is realized by cross valve, also ensure that the service life of cross valve.
In addition, defrosting control method according to the above embodiment of the present invention, can also have following additional technical characteristic:
According to one embodiment of present invention, described frequency determining step comprises: the first determining step, and according to described current waveform condition adjudgement, whether compressor enters low-frequency torque compensation; Raising frequency step, judged result be described compressor enter described low-frequency torque compensation time, stop reducing the running frequency of described compressor, and start the running frequency raising described compressor; Second determining step, after the described running frequency of rising, according to described current waveform condition adjudgement, whether compressor exits described low-frequency torque compensation; Obtaining step, judged result be described compressor exit described low-frequency torque compensation time, obtain the current operation frequency of described compressor, and using described current operation frequency as described target frequency.
According to the defrosting control method of the embodiment of the present invention, in frequency reducing process, when detecting that low-frequency torque compensation opened by compressor, illustrate that compressor enters low-frequency torque compensation traffic coverage, now compressor stops continuing frequency reducing, and raising frequency exits the Frequency point of compensated torque to predetermined compressor, after reaching this Frequency point, compressor exits compensated torque, starts defrosting.Like this, be just the applicable frequency that compressor have selected in defrosting, make compressor both can not produce the fluctuation of speed because of underfrequency, cause compressor unstable, protect the security of operation of compressor; Meanwhile, going out compensated torque at arrival preset frequency point backing, making compressor current waveform will be caused excessively random because of still there is compensated torque after switching refrigeration mode, thus cancel closedown, improve the life-span of compressor; In addition, also avoid and carry out cross valve commutation under too high compressor frequency, under suitable frequency, system high-low pressure pressure reduction is less, and the impact that cross valve is subject to is also less, thus improves the life-span of cross valve.
According to one embodiment of present invention, when the running status of described current waveform is for becoming labile state from stable state, be judged as that described compressor enters described low-frequency torque compensation, judged result be labile state become stable state time, be judged as that described compressor exits described low-frequency torque compensation.
According to the defrosting control method of the embodiment of the present invention, when the frequency of compressor is reduced to certain level, because the pressure in compresser cylinder constantly changes, the moment be carried on compressor drum is caused also constantly to change, and the adjustment action of controller has certain hysteresis quality, the skew of rotor c.g. can make compressor produce mechanical oscillation, cause the fluctuation of compressor rotary speed, the running status of current waveform will become unstable, that is when the running status of current waveform will become instability, just can carry out compensated torque to compressor, improve the stability of air-conditioner.Also should compensated torque be exited after arrival preset frequency point, in order that make compressor current waveform will be caused excessively random because of still there is compensated torque after switching refrigeration mode, thus cancel closedown, to improve the life-span of compressor.
According to one embodiment of present invention, after described air-conditioner starts to defrost, also comprise: judge whether described air-conditioner has defrosted complete; When judged result is for defrosting complete, controlling described compressor quits work; Described defrosting mode is switched to described heating mode again, and restarts described compressor, heat.
According to the defrosting control method of the embodiment of the present invention, compressor can continue raising frequency, to improve defrosting speed, when detecting that outdoor heat exchanger has defrosted completely, after stopping compressor again, exiting defrosting cross valve is commutated, avoiding the impact energetically cross valve caused because carrying out cross valve commutation under too high compressor frequency, to promote the life-span of cross valve.After system has been switched to heating mode again, air-conditioner restarts compressor starts and heats.
According to one embodiment of present invention, realize switching to described defrosting mode by described heating mode by the commutation of cross valve in described air-conditioner, or switch to described heating mode by described defrosting mode.
According to the defrosting control method of the embodiment of the present invention, cross valve commutation can make air-conditioner switch between heating mode and defrosting mode.
Embodiment according to a second aspect of the present invention proposes a kind of defrost control system of air-conditioner, comprising: lower frequency unit, when described air-conditioner is in heating mode, needs defrosting, reduce the running frequency of the compressor of described air-conditioner if detect; Detecting unit, detects current waveform state during described compressor operating in real time; Frequency determinative elements, target frequency when determining that described compressor exits low-frequency torque compensation according to described current waveform state; Defrost unit, when the running frequency of described compressor equals described target frequency, switches to defrosting mode by described heating mode, and the running frequency raising described compressor is to start to defrost.
According to the defrost control system of the embodiment of the present invention, when air-conditioner needs to defrost, compressor starts frequency reducing, and determine target frequency when exiting low-frequency torque compensation according to current waveform during compressor operating, commutating frequency during namely compressor defrosting, when the running frequency of compressor is equal with this commutating frequency, air-conditioner switches to defrosting mode.Like this; compressor need not be stopped just can defrosting; improve heating effect; and when compressor exits low-frequency torque compensation running mode switching; now running current waveform more stable, compressor cancel closedown can not be caused, improve the reliability of air-conditioner; simultaneously because the conversion of compressor mode is realized by cross valve, also ensure that the service life of cross valve.
According to one embodiment of present invention, described frequency determinative elements comprises: judging unit, and according to described current waveform condition adjudgement, whether compressor enters low-frequency torque compensation; Higher frequency unit, judged result be described compressor enter described low-frequency torque compensation time, stop reducing the running frequency of described compressor, and start the running frequency raising described compressor; Described judging unit also for: rising described running frequency after, according to described current waveform condition adjudgement, whether compressor exits described low-frequency torque compensation; And acquiring unit, judged result be described compressor exit described low-frequency torque compensation time, obtain the current operation frequency of described compressor, and using described current operation frequency as described target frequency.
According to the defrost control system of the embodiment of the present invention, in frequency reducing process, when detecting that low-frequency torque compensation opened by compressor, illustrate that compressor enters low-frequency torque compensation traffic coverage, now compressor stops continuing frequency reducing, and raising frequency exits the Frequency point of compensated torque to predetermined compressor, after reaching this Frequency point, compressor exits compensated torque, starts defrosting.Like this, be just the applicable frequency that compressor have selected in defrosting, make compressor both can not produce the fluctuation of speed because of underfrequency, cause compressor unstable, protect the security of operation of compressor; Meanwhile, going out compensated torque at arrival preset frequency point backing, making compressor current waveform will be caused excessively random because of still there is compensated torque after switching refrigeration mode, thus cancel closedown, improve the life-span of compressor; In addition, also avoid and carry out cross valve commutation under too high compressor frequency, under suitable frequency, system high-low pressure pressure reduction is less, and the impact that cross valve is subject to is also less, thus improves the life-span of cross valve.
According to one embodiment of present invention, described judging unit specifically for: described current waveform running status for become labile state from stable state time, be judged as that described compressor enters described low-frequency torque compensation, judged result be labile state become stable state time, be judged as that described compressor exits described low-frequency torque compensation.
According to the defrost control system of the embodiment of the present invention, when the frequency of compressor is reduced to certain level, because the pressure in compresser cylinder constantly changes, the moment be carried on compressor drum is caused also constantly to change, and the adjustment action of controller has certain hysteresis quality, the skew of rotor c.g. can make compressor produce mechanical oscillation, cause the fluctuation of compressor rotary speed, the running status of current waveform will become unstable, that is when the running status of current waveform will become instability, just can carry out compensated torque to compressor, improve the stability of air-conditioner.Also should compensated torque be exited after arrival preset frequency point, in order that make compressor current waveform will be caused excessively random because of still there is compensated torque after switching refrigeration mode, thus cancel closedown, to improve the life-span of compressor.
According to one embodiment of present invention, also comprise: defrosting judging unit, judges whether described air-conditioner has defrosted complete; Processing unit, when judged result is for defrosting complete, controlling described compressor quits work, and described defrosting mode is switched to again described heating mode, and restarts described compressor, heats.
According to the defrost control system of the embodiment of the present invention, compressor can continue raising frequency, to improve defrosting speed, when detecting that outdoor heat exchanger has defrosted completely, after stopping compressor again, exiting defrosting cross valve is commutated, avoiding the impact energetically cross valve caused because carrying out cross valve commutation under too high compressor frequency, to promote the life-span of cross valve.After system has been switched to heating mode again, air-conditioner restarts compressor starts and heats.
Embodiment according to a third aspect of the present invention proposes a kind of air-conditioner, comprise: the defrost control system of compressor, cross valve, outdoor heat exchanger, restricting element, indoor heat exchanger and the air-conditioner according to any one of technique scheme, the reliability of air-conditioner is ensured while can not stopping compressor when defrosting, and improve heating effect, this air-conditioner has the technique effect identical with the defrost control system of above-mentioned air-conditioner, does not repeat them here.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 shows the schematic flow diagram of the defrosting control method of air-conditioner according to an embodiment of the invention;
Fig. 2 shows the schematic block diagram of the defrost control system of air-conditioner according to an embodiment of the invention;
Fig. 3 shows the schematic flow diagram of defrosting control method according to an embodiment of the invention.
Detailed description of the invention
In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.
Fig. 1 shows the schematic flow diagram of the defrosting control method of air-conditioner according to an embodiment of the invention.
As shown in Figure 1, the defrosting control method of air-conditioner according to an embodiment of the invention, comprising:
Step 102, when air-conditioner is in heating mode, needs defrosting, reduces the running frequency of the compressor of air-conditioner if detect.
Step 104, detects current waveform state during compressor operating in real time.
Step 106, target frequency when exiting low-frequency torque compensation according to current waveform state determination compressor.
Step 108, when the running frequency of compressor equals target frequency, switches to defrosting mode by heating mode, and the running frequency raising compressor is to start to defrost.
According to the defrosting control method of the embodiment of the present invention, when air-conditioner needs to defrost, compressor starts frequency reducing, and determine target frequency when exiting low-frequency torque compensation according to current waveform during compressor operating, commutating frequency during namely compressor defrosting, when the running frequency of compressor is equal with this commutating frequency, air-conditioner switches to defrosting mode.Like this; compressor need not be stopped just can defrosting; improve heating effect; and when compressor exits low-frequency torque compensation running mode switching; now running current waveform more stable, compressor cancel closedown can not be caused, improve the reliability of air-conditioner; simultaneously because the conversion of compressor mode is realized by cross valve, also ensure that the service life of cross valve.
In addition, defrosting control method according to the above embodiment of the present invention, can also have following additional technical characteristic:
According to one embodiment of present invention, step 106 comprises: whether enter low-frequency torque compensation according to current waveform condition adjudgement compressor; Judged result be compressor enter low-frequency torque compensation time, stop reducing the running frequency of compressor, and start the running frequency raising compressor; After rising running frequency, whether exit low-frequency torque compensation according to current waveform condition adjudgement compressor; Judged result be compressor exit low-frequency torque compensation time, obtain the current operation frequency of compressor, and using current operation frequency as target frequency.
According to the defrosting control method of the embodiment of the present invention, in frequency reducing process, when detecting that low-frequency torque compensation opened by compressor, illustrate that compressor enters low-frequency torque compensation traffic coverage, now compressor stops continuing frequency reducing, and raising frequency exits the Frequency point of compensated torque to predetermined compressor, after reaching this Frequency point, compressor exits compensated torque, starts defrosting.Like this, be just the applicable frequency that compressor have selected in defrosting, make compressor both can not produce the fluctuation of speed because of underfrequency, cause compressor unstable, protect the security of operation of compressor; Meanwhile, going out compensated torque at arrival preset frequency point backing, making compressor current waveform will be caused excessively random because of still there is compensated torque after switching refrigeration mode, thus cancel closedown, improve the life-span of compressor; In addition, also avoid and carry out cross valve commutation under too high compressor frequency, under suitable frequency, system high-low pressure pressure reduction is less, and the impact that cross valve is subject to is also less, thus improves the life-span of cross valve.
According to one embodiment of present invention, when the running status of current waveform is for becoming labile state from stable state, be judged as that compressor enters low-frequency torque compensation, judged result be labile state become stable state time, be judged as that compressor exits low-frequency torque compensation.
According to the defrosting control method of the embodiment of the present invention, when the frequency of compressor is reduced to certain level, because the pressure in compresser cylinder constantly changes, the moment be carried on compressor drum is caused also constantly to change, and the adjustment action of controller has certain hysteresis quality, the skew of rotor c.g. can make compressor produce mechanical oscillation, cause the fluctuation of compressor rotary speed, the running status of current waveform will become unstable, that is when the running status of current waveform will become instability, just can carry out compensated torque to compressor, improve the stability of air-conditioner.Also should compensated torque be exited after arrival preset frequency point, in order that make compressor current waveform will be caused excessively random because of still there is compensated torque after switching refrigeration mode, thus cancel closedown, to improve the life-span of compressor.
According to one embodiment of present invention, after step 108, also comprise: judge whether air-conditioner has defrosted complete; When judged result is for defrosting complete, controls compressor and quitting work; Defrosting mode is switched to heating mode again, and restarts compressor, heat.
According to the defrosting control method of the embodiment of the present invention, compressor can continue raising frequency, to improve defrosting speed, when detecting that outdoor heat exchanger has defrosted completely, after stopping compressor again, exiting defrosting cross valve is commutated, avoiding the impact energetically cross valve caused because carrying out cross valve commutation under too high compressor frequency, to promote the life-span of cross valve.After system has been switched to heating mode again, air-conditioner restarts compressor starts and heats.
According to one embodiment of present invention, realize switching to defrosting mode by heating mode by the commutation of cross valve in air-conditioner, or switch to heating mode by defrosting mode.
According to the defrosting control method of the embodiment of the present invention, cross valve commutation can make air-conditioner switch between heating mode and defrosting mode.
Fig. 2 shows the schematic block diagram of the defrost control system of air-conditioner according to an embodiment of the invention.
As shown in Figure 2, the defrost control system 200 of air-conditioner according to an embodiment of the invention, comprising: lower frequency unit 202, when air-conditioner is in heating mode, needs defrosting if detect, reduces the running frequency of the compressor of air-conditioner; Detecting unit 204, detects current waveform state during compressor operating in real time; Frequency determinative elements 206, target frequency when exiting low-frequency torque compensation according to current waveform state determination compressor; Defrost unit 208, when the running frequency of compressor equals target frequency, switches to defrosting mode by heating mode, and the running frequency raising compressor is to start to defrost.
According to the defrost control system 200 of the embodiment of the present invention, when air-conditioner needs to defrost, compressor starts frequency reducing, and determine target frequency when exiting low-frequency torque compensation according to current waveform during compressor operating, commutating frequency during namely compressor defrosting, when the running frequency of compressor is equal with this commutating frequency, air-conditioner switches to defrosting mode.Like this; compressor need not be stopped just can defrosting; improve heating effect; and when compressor exits low-frequency torque compensation running mode switching; now running current waveform more stable, compressor cancel closedown can not be caused, improve the reliability of air-conditioner; simultaneously because the conversion of compressor mode is realized by cross valve, also ensure that the service life of cross valve.
According to one embodiment of present invention, frequency determinative elements 206 comprises: judging unit 2062, whether enters low-frequency torque compensation according to current waveform condition adjudgement compressor; Higher frequency unit 2064, judged result be compressor enter low-frequency torque compensation time, stop reducing the running frequency of compressor, and start the running frequency raising compressor; Judging unit 2062 also for: rising running frequency after, whether exit low-frequency torque compensation according to current waveform condition adjudgement compressor; And acquiring unit 2066, judged result be compressor exit low-frequency torque compensation time, obtain the current operation frequency of compressor, and using current operation frequency as target frequency.
According to the defrost control system 200 of the embodiment of the present invention, in frequency reducing process, when detecting that low-frequency torque compensation opened by compressor, illustrate that compressor enters low-frequency torque compensation traffic coverage, now compressor stops continuing frequency reducing, and raising frequency exits the Frequency point of compensated torque to predetermined compressor, after reaching this Frequency point, compressor exits compensated torque, starts defrosting.Like this, be just the applicable frequency that compressor have selected in defrosting, make compressor both can not produce the fluctuation of speed because of underfrequency, cause compressor unstable, protect the security of operation of compressor; Meanwhile, going out compensated torque at arrival preset frequency point backing, making compressor current waveform will be caused excessively random because of still there is compensated torque after switching refrigeration mode, thus cancel closedown, improve the life-span of compressor; In addition, also avoid and carry out cross valve commutation under too high compressor frequency, under suitable frequency, system high-low pressure pressure reduction is less, and the impact that cross valve is subject to is also less, thus improves the life-span of cross valve.
According to one embodiment of present invention, judging unit 2062 specifically for: current waveform running status for become labile state from stable state time, be judged as that compressor enters low-frequency torque compensation, judged result be labile state become stable state time, be judged as that compressor exits low-frequency torque compensation.
According to the defrost control system 200 of the embodiment of the present invention, when the frequency of compressor is reduced to certain level, because the pressure in compresser cylinder constantly changes, the moment be carried on compressor drum is caused also constantly to change, and the adjustment action of controller has certain hysteresis quality, the skew of rotor c.g. can make compressor produce mechanical oscillation, cause the fluctuation of compressor rotary speed, the running status of current waveform will become unstable, that is when the running status of current waveform will become instability, just can carry out compensated torque to compressor, improve the stability of air-conditioner.Also should compensated torque be exited after arrival preset frequency point, in order that make compressor current waveform will be caused excessively random because of still there is compensated torque after switching refrigeration mode, thus cancel closedown, to improve the life-span of compressor.
According to one embodiment of present invention, also comprise: defrosting judging unit 210, judges whether air-conditioner has defrosted complete; Processing unit 212, when judged result is for defrosting complete, controls compressor and quitting work, and defrosting mode being switched to again heating mode, and restarting compressor, heating.
According to the defrost control system 200 of the embodiment of the present invention, compressor can continue raising frequency, to improve defrosting speed, when detecting that outdoor heat exchanger has defrosted completely, after stopping compressor again, exiting defrosting cross valve is commutated, avoiding the impact energetically cross valve caused because carrying out cross valve commutation under too high compressor frequency, to promote the life-span of cross valve.After system has been switched to heating mode again, air-conditioner restarts compressor starts and heats.
Fig. 3 shows the schematic flow diagram of defrosting control method according to an embodiment of the invention.
As shown in Figure 3, defrosting control method according to an embodiment of the invention, comprising:
Step 302, starts to enter defrost pattern.
Step 304, compressor frequency reducing.Air-conditioner is after entering defrosting mode, and frequency-changeable compressor first carries out down conversion process.
Step 306, detects compressor and whether opens low-frequency torque compensation, when judged result is for being, entering step 308, when judged result is no, returning step 304.The current waveform of compressor constantly will be detected in frequency reducing process, when detect this current waveform from stable become instability time, illustrate that compressor opens low-frequency torque compensation, enter low-frequency torque compensation traffic coverage, now compressor just can stop continuing frequency reducing, enters step 308.
Step 308, rises to frequency a by compressor frequency.After judging that compressor enters low-frequency torque compensation, stop the running frequency reducing compressor, and running frequency to the predetermined compressor raising compressor exits the Frequency point a of compensated torque, after reaching this Frequency point a, the current waveform of compressor is become stable from instability, compressor exits compensated torque.Like this, be just the applicable frequency that compressor have selected in defrosting, make compressor both can not produce the fluctuation of speed because of underfrequency, cause compressor unstable, protect the security of operation of compressor.
Step 310, cross valve commutates.When frequency a carries out cross valve commutation, the running current waveform of compressor is more stable, can not affect the control of compressor, cause cancel closedown, ensure that the reliability of air-conditioning.
Step 312, the defrost of compressor raising frequency.After cross valve commutation, air-conditioner starts defrost, and compressor continues raising frequency, to improve defrost speed.
Step 314, defrost completes.After outdoor heat exchanger defrost completely being detected, compressor out of service, exits defrost pattern.
Step 316, normal startup heats.Cross valve commutates again, is switched to the state of heating, and air-conditioning starts to heat.
More than be described with reference to the accompanying drawings technical scheme of the present invention, by technical scheme of the present invention, compressor can not stopped when defrosting, and improve heating effect, improve the reliability of air-conditioning, improve Consumer's Experience.
In the present invention, term " first ", " second " object only for describing, and instruction or hint relative importance can not be interpreted as.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a defrosting control method for air-conditioner, is characterized in that, comprising:
Down-converting step, when described air-conditioner is in heating mode, needs defrosting, reduces the running frequency of the compressor of described air-conditioner if detect;
Detecting step, detects current waveform state during described compressor operating in real time;
Frequency determining step, target frequency when determining that described compressor exits low-frequency torque compensation according to described current waveform state;
Defrosting step, when the running frequency of described compressor equals described target frequency, switches to defrosting mode by described heating mode, and the running frequency raising described compressor is to start to defrost.
2. the defrosting control method of air-conditioner according to claim 1, is characterized in that, described frequency determining step comprises:
First determining step, according to described current waveform condition adjudgement, whether compressor enters low-frequency torque compensation;
Raising frequency step, judged result be described compressor enter described low-frequency torque compensation time, stop reducing the running frequency of described compressor, and start the running frequency raising described compressor;
Second determining step, after the described running frequency of rising, according to described current waveform condition adjudgement, whether compressor exits described low-frequency torque compensation;
Obtaining step, judged result be described compressor exit described low-frequency torque compensation time, obtain the current operation frequency of described compressor, and using described current operation frequency as described target frequency.
3. the defrosting control method of air-conditioner according to claim 2, it is characterized in that, when the running status of described current waveform is for becoming labile state from stable state, be judged as that described compressor enters described low-frequency torque compensation, judged result be labile state become stable state time, be judged as that described compressor exits described low-frequency torque compensation.
4. the defrosting control method of air-conditioner according to claim 1, is characterized in that, after described air-conditioner starts to defrost, also comprises:
Judge whether described air-conditioner has defrosted complete;
When judged result is for defrosting complete, controlling described compressor quits work;
Described defrosting mode is switched to described heating mode again, and restarts described compressor, heat.
5. the defrosting control method of air-conditioner according to any one of claim 1 to 4, it is characterized in that, realize switching to described defrosting mode by described heating mode by the commutation of cross valve in described air-conditioner, or switch to described heating mode by described defrosting mode.
6. a defrost control system for air-conditioner, is characterized in that, comprising:
Lower frequency unit, when described air-conditioner is in heating mode, needs defrosting, reduces the running frequency of the compressor of described air-conditioner if detect;
Detecting unit, detects current waveform state during described compressor operating in real time;
Frequency determinative elements, target frequency when determining that described compressor exits low-frequency torque compensation according to described current waveform state;
Defrost unit, when the running frequency of described compressor equals described target frequency, switches to defrosting mode by described heating mode, and the running frequency raising described compressor is to start to defrost.
7. the defrost control system of air-conditioner according to claim 6, is characterized in that, described frequency determinative elements comprises:
Judging unit, according to described current waveform condition adjudgement, whether compressor enters low-frequency torque compensation;
Higher frequency unit, judged result be described compressor enter described low-frequency torque compensation time, stop reducing the running frequency of described compressor, and start the running frequency raising described compressor;
Described judging unit also for:
After the described running frequency of rising, according to described current waveform condition adjudgement, whether compressor exits described low-frequency torque compensation; And
Acquiring unit, judged result be described compressor exit described low-frequency torque compensation time, obtain the current operation frequency of described compressor, and using described current operation frequency as described target frequency.
8. the defrost control system of air-conditioner according to claim 7, is characterized in that, described judging unit specifically for:
When the running status of described current waveform is for becoming labile state from stable state, be judged as that described compressor enters described low-frequency torque compensation, judged result be labile state become stable state time, be judged as that described compressor exits described low-frequency torque compensation.
9. the defrost control system of air-conditioner according to claim 6, is characterized in that, also comprises:
Defrosting judging unit, judges whether described air-conditioner has defrosted complete;
Processing unit, when judged result is for defrosting complete, controlling described compressor quits work, and described defrosting mode is switched to again described heating mode, and restarts described compressor, heats.
10. an air-conditioner, is characterized in that, comprises the defrost control system of the air-conditioner according to any one of claim 6 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410438287.6A CN104214898B (en) | 2014-08-29 | 2014-08-29 | Air-conditioner and defrosting control method thereof and defrosting control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410438287.6A CN104214898B (en) | 2014-08-29 | 2014-08-29 | Air-conditioner and defrosting control method thereof and defrosting control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104214898A true CN104214898A (en) | 2014-12-17 |
| CN104214898B CN104214898B (en) | 2016-08-17 |
Family
ID=52096655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410438287.6A Active CN104214898B (en) | 2014-08-29 | 2014-08-29 | Air-conditioner and defrosting control method thereof and defrosting control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104214898B (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964400A (en) * | 2015-07-21 | 2015-10-07 | 芜湖美智空调设备有限公司 | Air conditioner and control method thereof |
| CN105138028A (en) * | 2015-09-18 | 2015-12-09 | 珠海格力电器股份有限公司 | Range hood rotating speed control method and device |
| CN106500267A (en) * | 2016-10-31 | 2017-03-15 | 芜湖美智空调设备有限公司 | The defrosting control method and its control device of air-conditioner |
| CN107238184A (en) * | 2017-06-28 | 2017-10-10 | 广东美的暖通设备有限公司 | Defrost frequency method of adjustment, system and air-conditioning |
| CN107917548A (en) * | 2017-10-13 | 2018-04-17 | 珠海格力电器股份有限公司 | The control method and heat pump system of heat pump system |
| CN108758968A (en) * | 2018-05-17 | 2018-11-06 | 广东美的制冷设备有限公司 | Air-conditioner control method and air conditioner |
| CN108759020A (en) * | 2018-05-17 | 2018-11-06 | 广东美的制冷设备有限公司 | Air-conditioner control method and air conditioner |
| CN110319536A (en) * | 2019-07-02 | 2019-10-11 | 宁波奥克斯电气股份有限公司 | A kind of defrosting control method of multi-online air-conditioning system, device and multi-online air-conditioning system |
| CN110486891A (en) * | 2019-08-22 | 2019-11-22 | 海信（山东）空调有限公司 | A kind of defrosting control method and air conditioner |
| CN111023459A (en) * | 2019-12-30 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Air conditioner operation control method and device and air conditioner |
| CN112032966A (en) * | 2020-08-24 | 2020-12-04 | Tcl空调器(中山)有限公司 | Reversing control method for four-way valve of air conditioner, air conditioner and storage medium |
| CN113091216A (en) * | 2021-04-14 | 2021-07-09 | 海信（广东）空调有限公司 | Defrosting control method for air conditioner |
| CN113639491A (en) * | 2021-07-07 | 2021-11-12 | 青岛海尔空调电子有限公司 | Method and device for defrosting heat pump equipment and hot water unit |
| CN114234367A (en) * | 2021-12-20 | 2022-03-25 | 安徽扬子空调股份有限公司 | Air conditioner defrosting control method and air conditioner |
| CN114484745A (en) * | 2022-03-01 | 2022-05-13 | 青岛海尔空调器有限总公司 | Control method and control system for defrosting of air conditioner, electronic equipment and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1271076A1 (en) * | 2001-06-29 | 2003-01-02 | SANYO ELECTRIC Co., Ltd. | Defrosting operation cancelling method for air conditioner and air conditioner using the same |
| CN101187516A (en) * | 2006-11-17 | 2008-05-28 | 海尔集团公司 | Air-conditioner defrosting method |
| JP2011052849A (en) * | 2009-08-31 | 2011-03-17 | Panasonic Corp | Air conditioner |
| CN102269463A (en) * | 2011-07-27 | 2011-12-07 | 海尔集团公司 | Control method for increasing low-temperature heating heat of varied-frequency air conditioner |
| JP2011252639A (en) * | 2010-06-01 | 2011-12-15 | Panasonic Corp | Air conditioner |
-
2014
- 2014-08-29 CN CN201410438287.6A patent/CN104214898B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1271076A1 (en) * | 2001-06-29 | 2003-01-02 | SANYO ELECTRIC Co., Ltd. | Defrosting operation cancelling method for air conditioner and air conditioner using the same |
| CN101187516A (en) * | 2006-11-17 | 2008-05-28 | 海尔集团公司 | Air-conditioner defrosting method |
| JP2011052849A (en) * | 2009-08-31 | 2011-03-17 | Panasonic Corp | Air conditioner |
| JP2011252639A (en) * | 2010-06-01 | 2011-12-15 | Panasonic Corp | Air conditioner |
| CN102269463A (en) * | 2011-07-27 | 2011-12-07 | 海尔集团公司 | Control method for increasing low-temperature heating heat of varied-frequency air conditioner |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964400B (en) * | 2015-07-21 | 2018-01-02 | 芜湖美智空调设备有限公司 | Air conditioner and its control method |
| CN104964400A (en) * | 2015-07-21 | 2015-10-07 | 芜湖美智空调设备有限公司 | Air conditioner and control method thereof |
| CN105138028A (en) * | 2015-09-18 | 2015-12-09 | 珠海格力电器股份有限公司 | Range hood rotating speed control method and device |
| CN106500267A (en) * | 2016-10-31 | 2017-03-15 | 芜湖美智空调设备有限公司 | The defrosting control method and its control device of air-conditioner |
| CN107238184A (en) * | 2017-06-28 | 2017-10-10 | 广东美的暖通设备有限公司 | Defrost frequency method of adjustment, system and air-conditioning |
| CN107238184B (en) * | 2017-06-28 | 2019-06-28 | 广东美的暖通设备有限公司 | Defrost frequency method of adjustment, system and air-conditioning |
| CN107917548A (en) * | 2017-10-13 | 2018-04-17 | 珠海格力电器股份有限公司 | The control method and heat pump system of heat pump system |
| WO2019218642A1 (en) * | 2018-05-17 | 2019-11-21 | 广东美的制冷设备有限公司 | Air conditioner control method and air conditioner |
| CN108758968A (en) * | 2018-05-17 | 2018-11-06 | 广东美的制冷设备有限公司 | Air-conditioner control method and air conditioner |
| CN108759020A (en) * | 2018-05-17 | 2018-11-06 | 广东美的制冷设备有限公司 | Air-conditioner control method and air conditioner |
| CN108758968B (en) * | 2018-05-17 | 2019-08-16 | 广东美的制冷设备有限公司 | Air-conditioner control method and air conditioner |
| CN110319536A (en) * | 2019-07-02 | 2019-10-11 | 宁波奥克斯电气股份有限公司 | A kind of defrosting control method of multi-online air-conditioning system, device and multi-online air-conditioning system |
| CN110486891A (en) * | 2019-08-22 | 2019-11-22 | 海信（山东）空调有限公司 | A kind of defrosting control method and air conditioner |
| CN111023459A (en) * | 2019-12-30 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Air conditioner operation control method and device and air conditioner |
| CN111023459B (en) * | 2019-12-30 | 2021-06-15 | 宁波奥克斯电气股份有限公司 | Air conditioner operation control method and device and air conditioner |
| CN112032966A (en) * | 2020-08-24 | 2020-12-04 | Tcl空调器(中山)有限公司 | Reversing control method for four-way valve of air conditioner, air conditioner and storage medium |
| CN113091216A (en) * | 2021-04-14 | 2021-07-09 | 海信（广东）空调有限公司 | Defrosting control method for air conditioner |
| CN113639491A (en) * | 2021-07-07 | 2021-11-12 | 青岛海尔空调电子有限公司 | Method and device for defrosting heat pump equipment and hot water unit |
| CN114234367A (en) * | 2021-12-20 | 2022-03-25 | 安徽扬子空调股份有限公司 | Air conditioner defrosting control method and air conditioner |
| CN114484745A (en) * | 2022-03-01 | 2022-05-13 | 青岛海尔空调器有限总公司 | Control method and control system for defrosting of air conditioner, electronic equipment and storage medium |
| CN114484745B (en) * | 2022-03-01 | 2024-01-16 | 青岛海尔空调器有限总公司 | Control method and control system for defrosting of air conditioner, electronic equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104214898B (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104214898A (en) | Air conditioner and defrosting control method and defrosting control system thereof | |
| US10982890B2 (en) | Air conditioner, and device and method for preventing cold air during heating of air conditioner | |
| CN103968494B (en) | The control method of air conditioning system and air conditioning system | |
| CN104913453A (en) | Anti-condensation control method, anti-condensation control system and air conditioner | |
| US10345022B2 (en) | Air-conditioning apparatus | |
| KR100690683B1 (en) | Air conditioner and heating operation control method therof | |
| JP2010223494A (en) | Air conditioner | |
| CN105972774A (en) | Control method and device for air conditioner and air conditioner | |
| CN104359283A (en) | Control method and device for air cooling refrigerator and air cooling refrigerator | |
| CN103940163A (en) | Defrosting control method and device | |
| CN111023515B (en) | Air conditioner, refrigeration control method of air conditioner and storage medium | |
| CN102425839A (en) | Forced defrosting control method for air conditioner | |
| JP2019219129A (en) | Air conditioner | |
| CN106322664A (en) | Air conditioning unit control device, control method and air conditioning unit | |
| CN103884079A (en) | Work mode switching method of air conditioner and air conditioner | |
| CN110836504B (en) | Defrosting control method for air conditioner | |
| CN109269022A (en) | Control method, air conditioner and the storage medium of air conditioner | |
| CN105972850A (en) | Air conditioner control method and device | |
| CN104251533A (en) | Heat recycling type air conditioning unit and composite running mode control method thereof | |
| CN105674646A (en) | Defrosting control method and device for refrigeration equipment and air conditioner | |
| JP5686754B2 (en) | Air conditioner | |
| JP5900463B2 (en) | Air conditioning system | |
| JP2008232500A (en) | Refrigerating cycle device | |
| JP2008256264A (en) | Air conditioner | |
| JP2007212023A (en) | Air conditioning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |