CN108278718B - Variable frequency air conditioner and control method thereof - Google Patents
Variable frequency air conditioner and control method thereof Download PDFInfo
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- CN108278718B CN108278718B CN201710005084.1A CN201710005084A CN108278718B CN 108278718 B CN108278718 B CN 108278718B CN 201710005084 A CN201710005084 A CN 201710005084A CN 108278718 B CN108278718 B CN 108278718B
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000004224 protection Effects 0.000 claims abstract description 88
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 230000007613 environmental effect Effects 0.000 claims description 6
- 230000010355 oscillation Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
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- 238000004134 energy conservation Methods 0.000 description 1
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Abstract
The application discloses a variable frequency air conditioner and a control method thereof, wherein after the variable frequency air conditioner is started, various system protections are detected firstly, when the system detects that a shutdown protection condition is met, the current operating frequency is memorized as F1, and then shutdown processing is carried out; after the shutdown processing, judging whether a protection exit condition is met, if so, recalculating the frequency and performing frequency-up operation; if the protection exit condition is not met, re-detecting various system protections; when the protection exit condition is met, the frequency is recalculated and the frequency is increased, when the current frequency is greater than or equal to F1X%, the slow frequency increasing control is carried out at the speed of Y/HZ until the frequency is increased to the target frequency, and when the frequency is less than F1X%, the frequency increasing control is carried out at the normal speed. According to the technical scheme of this application embodiment, can reduce the frequency and vibrate, the noise reduction improves the travelling comfort.
Description
Technical Field
The invention particularly relates to the technical field of air conditioners, and particularly relates to a variable frequency air conditioner and a control method thereof.
Background
Along with the improvement of the living standard of social residents, the frequency conversion air conditioner is more and more popular in the market and more widely applied in the aspects of energy conservation and comfort.
The inverter air conditioner in the prior art generally protects the system, and the system protection generally has frequency limiting, frequency reducing and shutdown protection. Due to the complexity of the user using environment, the protection parameters may not satisfy all protection conditions, and there may be a problem of oscillation of the frequency. The comfort of the user is affected, and the noise of raising and lowering the frequency is also generated.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide an inverter air conditioner and a control method thereof that reduces frequency oscillation, reduces noise, and improves comfort.
In one aspect, a method for controlling an inverter air conditioner includes:
after the variable frequency air conditioner starts, firstly detecting various system protections, memorizing the current operating frequency of F1 when the system detects that the shutdown protection condition is met, and then performing shutdown processing;
after the shutdown processing, judging whether a protection exit condition is met, if so, recalculating the frequency and performing frequency-up operation; if the protection exit condition is not met, re-detecting various system protections;
when the protection exit condition is met, the frequency is recalculated and the frequency is increased, when the current frequency is greater than or equal to F1X%, the slow frequency increasing control is carried out at the speed of Y/HZ until the frequency is increased to the target frequency, and when the frequency is less than F1X%, the frequency increasing control is carried out at the normal speed.
Further, the control method judges whether the down-conversion protection condition is met or not when detecting that various system protection judgments do not meet the shutdown protection condition.
Further, the control method determines whether to enter the down protection for the first time when the down protection condition is satisfied, and memorizes that the current operating frequency is F1 if the down protection is not entered for the first time.
Further, the control method firstly controls the frequency to operate at a normal frequency-increasing rate when the system meets the protection exit condition; when the current frequency is greater than or equal to F1X%, performing slow frequency-increasing control at the speed of Y/HZ until the current frequency is increased to the target frequency, and when the frequency is less than F1X%, performing frequency-increasing control at the normal speed.
Further, if the control method does not enter the frequency down protection for the first time, the control method firstly operates the frequency at the normal frequency increasing rate according to the previously memorized frequency F1 in the system; when the current frequency is greater than or equal to F1X%, performing slow frequency-increasing control at the speed of Y/HZ until the current frequency is increased to the target frequency, and when the frequency is less than F1X%, performing frequency-increasing control at the normal speed. .
In another aspect, an inverter air conditioner includes the following control methods:
after the variable frequency air conditioner starts, firstly detecting various system protections, memorizing the current operating frequency of F1 when the system detects that the shutdown protection condition is met, and then performing shutdown processing;
after the shutdown processing, judging whether a protection exit condition is met, if so, recalculating the frequency and performing frequency-up operation; if the protection exit condition is not met, re-detecting various system protections;
when the protection exit condition is met, the frequency is recalculated and the frequency is increased, when the current frequency is greater than or equal to F1X%, the slow frequency increasing control is carried out at the speed of Y/HZ until the frequency is increased to the target frequency, and when the frequency is less than F1X%, the frequency increasing control is carried out at the normal speed.
Further, the variable frequency air conditioner judges whether the down-conversion protection condition is met or not when detecting that various system protection judgments do not meet the shutdown protection condition.
Further, when the frequency conversion air conditioner meets the frequency reduction protection condition, whether the frequency reduction protection is firstly entered is judged, and if the frequency reduction protection is not firstly entered, the current operating frequency is F1.
Further, when the system meets the protection exit condition, the variable frequency air conditioner firstly operates at a normal frequency increasing rate control frequency; when the current frequency is greater than or equal to F1X%, performing slow frequency-increasing control at the speed of Y/HZ until the current frequency is increased to the target frequency, and when the frequency is less than F1X%, performing frequency-increasing control at the normal speed.
Further, if the variable frequency air conditioner does not enter the frequency reduction protection for the first time, the variable frequency air conditioner controls the frequency to operate at a normal frequency increasing rate according to the previously memorized frequency F1 in the system; when the current frequency is greater than or equal to F1X%, performing slow frequency-increasing control at the speed of Y/HZ until the current frequency is increased to the target frequency, and when the frequency is less than F1X%, performing frequency-increasing control at the normal speed.
According to the technical scheme provided by the embodiment of the application, the current operating frequency point is memorized after protective shutdown and first system protection frequency reduction, the target frequency is calculated again according to requirements and environmental working conditions after the system protection is recovered, and after the operating frequency is greater than X% of the memorized frequency, the frequency is controlled in a frequency increasing mode until the target frequency is reached; the problem that after the air conditioner is powered off, because the electrolytic capacitor is too long in discharge time, if the air conditioner is powered on in a discharge period, because the single chip microcomputer is not reset, slow start cannot be carried out, and therefore impact current is generated is solved; therefore, frequency oscillation is reduced, noise is reduced, and the comfort of the variable frequency air conditioner is improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a flow chart of a control method of an inverter air conditioner according to the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 of the drawings, a,
a control method of an inverter air conditioner comprises the following steps:
after the variable frequency air conditioner starts, firstly detecting various system protections, memorizing the current operating frequency of F1 when the system detects that the shutdown protection condition is met, and then performing shutdown processing;
after the shutdown processing, judging whether a protection exit condition is met, if so, recalculating the frequency and performing frequency-up operation; if the protection exit condition is not met, re-detecting various system protections;
when the protection exit condition is met, the frequency is recalculated and the frequency is increased, when the current frequency is greater than or equal to F1X%, the slow frequency increasing control is carried out at the speed of Y/HZ until the frequency is increased to the target frequency, and when the frequency is less than F1X%, the frequency increasing control is carried out at the normal speed.
After the air conditioning system starts and various system protections are detected, when the system does not meet the shutdown protection condition, the system judges whether the frequency reduction protection condition is met; if the protection condition of frequency reduction is not met, performing frequency up control at a normal speed, and if the protection condition of frequency reduction is met, judging whether to enter the protection frequency reduction for the first time;
if the protection frequency is entered for the first time, memorizing the current operation frequency as F1 and performing frequency reduction treatment, when the system meets the protection exit condition, calculating the target frequency again according to the requirement and the environmental working condition, and operating at the normal frequency-increasing rate control frequency after calculating the target frequency; when the current frequency is greater than or equal to F1X%, performing slow frequency-increasing control at the speed of Y/HZ until the current frequency is increased to the target frequency, and when the frequency is less than F1X%, performing frequency-increasing control at the normal speed.
If the protection frequency is not entered for the first time, the memory frequency F1 is already existed in the system, then the frequency reduction processing is directly carried out, when the system meets the protection exit condition, the target frequency is calculated again according to the requirement and the environmental working condition, and the frequency is controlled to operate at the normal frequency increasing rate after the target frequency is calculated; when the current frequency is greater than or equal to F1X%, performing slow frequency-increasing control at the speed of Y/HZ until the current frequency is increased to the target frequency, and when the frequency is less than F1X%, performing frequency-increasing control at the normal speed.
According to the control method, the current operating frequency point is memorized after protective shutdown and first system protection frequency reduction, the target frequency is calculated again according to requirements and environmental working conditions after the system protection is recovered, and after the operating frequency is greater than X% of the memorized frequency, the frequency is controlled in a frequency increasing mode until the target frequency is reached; the problem that after the air conditioner is powered off, because the electrolytic capacitor is too long in discharge time, if the air conditioner is powered on in a discharge period, because the single chip microcomputer is not reset, slow start cannot be carried out, and therefore impact current is generated is solved; therefore, frequency oscillation is reduced, noise is reduced, and the comfort of the variable frequency air conditioner is improved.
The invention further provides an inverter air conditioner which comprises the control method.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A control method of an inverter air conditioner comprises the following steps:
after the variable frequency air conditioner starts, firstly detecting various system protections, memorizing the current operating frequency of F1 when the system detects that the shutdown protection condition is met, and then performing shutdown processing;
after the shutdown processing, judging whether a protection exit condition is met, if so, recalculating the frequency and performing frequency-up operation; if the protection exit condition is not met, re-detecting various system protections;
when the protection exit condition is met, the frequency is recalculated and the frequency is increased, when the current frequency is greater than or equal to F1X%, the slow frequency increasing control is carried out at the speed of Y/HZ until the frequency is increased to the target frequency, and when the frequency is less than F1X%, the frequency increasing control is carried out at the normal speed.
2. The inverter air conditioner control method according to claim 1, wherein the control method determines whether a down-conversion protection condition is satisfied when detecting that various system protection determinations do not satisfy the shutdown protection condition.
3. The method as claimed in claim 2, wherein the method determines whether to enter the down-conversion protection for the first time when the down-conversion protection condition is satisfied, and memorizes that the current operating frequency is F1 if the down-conversion protection is entered for the first time.
4. The inverter air conditioner control method according to claim 3, wherein the control method, when the system meets the protection exit condition, firstly operates at the normal up-conversion rate control frequency; when the current frequency is greater than or equal to F1X%, performing slow frequency-increasing control at the speed of Y/HZ until the current frequency is increased to the target frequency, and when the frequency is less than F1X%, performing frequency-increasing control at the normal speed.
5. The method for controlling the variable frequency air conditioner as claimed in claim 3, wherein if the control method does not enter the frequency reduction protection for the first time, the memory frequency F1 is already existed in the system, then the frequency reduction processing is directly performed, when the system meets the protection exit condition, the target frequency is calculated again according to the requirement and the environmental working condition, and the frequency is controlled to operate at the normal frequency increasing rate after the target frequency is calculated; when the current frequency is greater than or equal to F1X%, performing slow frequency-increasing control at the speed of Y/HZ until the current frequency is increased to the target frequency, and when the frequency is less than F1X%, performing frequency-increasing control at the normal speed.
6. An inverter air conditioner comprises the following control methods:
after the variable frequency air conditioner starts, firstly detecting various system protections, memorizing the current operating frequency of F1 when the system detects that the shutdown protection condition is met, and then performing shutdown processing;
after the shutdown processing, judging whether a protection exit condition is met, if so, recalculating the frequency and performing frequency-up operation; if the protection exit condition is not met, re-detecting various system protections;
when the protection exit condition is met, the frequency is recalculated and the frequency is increased, when the current frequency is greater than or equal to F1X%, the slow frequency increasing control is carried out at the speed of Y/HZ until the frequency is increased to the target frequency, and when the frequency is less than F1X%, the frequency increasing control is carried out at the normal speed.
7. The inverter air conditioner of claim 6, wherein the inverter air conditioner detects various system protections, and determines whether a down-conversion protection condition is satisfied when determining that a shutdown protection condition is not satisfied.
8. The inverter air conditioner of claim 7, wherein the inverter air conditioner determines whether to enter the down-conversion protection for the first time when the down-conversion protection condition is satisfied, and memorizes that the current operating frequency is F1 if the down-conversion protection is entered for the first time.
9. The inverter air conditioner of claim 8, wherein the inverter air conditioner operates at a normal up-conversion rate control frequency first when the system meets a protection exit condition; when the current frequency is greater than or equal to F1X%, performing slow frequency-increasing control at the speed of Y/HZ until the current frequency is increased to the target frequency, and when the frequency is less than F1X%, performing frequency-increasing control at the normal speed.
10. The inverter air conditioner of claim 8, wherein if the inverter air conditioner does not enter the down-conversion protection for the first time, it indicates that the system already has the memory frequency F1, and then the down-conversion process is directly performed, when the system meets the protection exit condition, the target frequency is calculated again according to the requirement and the environmental condition, and after the target frequency is calculated, the frequency is controlled to operate at the normal up-conversion rate; when the current frequency is greater than or equal to F1X%, performing slow frequency-increasing control at the speed of Y/HZ until the current frequency is increased to the target frequency, and when the frequency is less than F1X%, performing frequency-increasing control at the normal speed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710005084.1A CN108278718B (en) | 2017-01-04 | 2017-01-04 | Variable frequency air conditioner and control method thereof |
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| CN201710005084.1A CN108278718B (en) | 2017-01-04 | 2017-01-04 | Variable frequency air conditioner and control method thereof |
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| CN108278718B true CN108278718B (en) | 2020-03-10 |
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| CN112728741B (en) * | 2020-12-30 | 2022-05-13 | 珠海拓芯科技有限公司 | Control method and device of air conditioner fan and air conditioner |
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| CN102345915A (en) * | 2011-08-02 | 2012-02-08 | 宁波奥克斯电气有限公司 | Fault operation control method of DC (direct current) convertible frequency air conditioner |
| CN104266305A (en) * | 2014-09-02 | 2015-01-07 | 广东美的集团芜湖制冷设备有限公司 | Variable-frequency air conditioner control device and method and variable-frequency air conditioner |
| CN105222441A (en) * | 2015-09-01 | 2016-01-06 | 珠海格力电器股份有限公司 | Control method and device of refrigeration system |
| CN106121982A (en) * | 2016-06-27 | 2016-11-16 | 广东美的制冷设备有限公司 | The compressor control method of convertible frequency air-conditioner and device, convertible frequency air-conditioner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010022079A (en) * | 2008-07-08 | 2010-01-28 | Delta Electronics Inc | Discontinuous protection method for inverter current clamping |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345915A (en) * | 2011-08-02 | 2012-02-08 | 宁波奥克斯电气有限公司 | Fault operation control method of DC (direct current) convertible frequency air conditioner |
| CN104266305A (en) * | 2014-09-02 | 2015-01-07 | 广东美的集团芜湖制冷设备有限公司 | Variable-frequency air conditioner control device and method and variable-frequency air conditioner |
| CN105222441A (en) * | 2015-09-01 | 2016-01-06 | 珠海格力电器股份有限公司 | Control method and device of refrigeration system |
| CN106121982A (en) * | 2016-06-27 | 2016-11-16 | 广东美的制冷设备有限公司 | The compressor control method of convertible frequency air-conditioner and device, convertible frequency air-conditioner |
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