CN105757884A - Control method of air conditioner - Google Patents
Control method of air conditioner Download PDFInfo
- Publication number
- CN105757884A CN105757884A CN201610119730.2A CN201610119730A CN105757884A CN 105757884 A CN105757884 A CN 105757884A CN 201610119730 A CN201610119730 A CN 201610119730A CN 105757884 A CN105757884 A CN 105757884A
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- compressor
- control method
- air
- frequency
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method of an air conditioner. The control method comprises the following steps: S1: receiving a stop instruction, detecting a current operation frequency F of a compressor and a current operation parameter of an outdoor machine, wherein the current operation parameter is at least one of a current operation pressure different, a current operation pressure ratio and a current input current; S2: comparing the current operation frequency F of the compressor with a set stop frequency value FS and the current operation parameter of the outdoor machine with a set stop parameter; S3: when at least one of the stop conditions that F is less than or equal to FS and more than or equal to F and the current operation parameter is smaller than or equal to the set stop parameter is satisfied, controlling an inverter to stop output; and if the stop condition is not satisfied, lowering the frequency of the compressor according to a preset frequency lowering rate until the stop condition is satisfied, and after a set time FST, controlling the inverter to stop the output. According to the control method of the air conditioner, the compressor piping stress when the air conditioner is stopped can be effectively decreased to a certain extent.
Description
Technical field
The present invention relates to field of air conditioning, especially relate to the control method of a kind of air-conditioner.
Background technology
Traditional transducer air conditioning is when compressor receives halt instruction, and general processing mode is all directly out of service.When system loading is bigger, press relatively larger, time compressor operating frequency is higher, if now stopping suddenly compressor, because system pressure, flow velocity, suddenly the change of flow and compressor electric motor and rotor rotatory inertia effect, compressor and pipe arrangement can produce violent shake, practical study test finds the single-rotor compressor that discharge capacity is more big, because its rotary inertia is big, the momentum that fluid produces is also big, the performance of this phenomenon is more obvious, now it is not controlled by being easy for causing that piping stress exceeds standard, the frequent start-stop of many number of times may result in pipe arrangement and declines service life, there is splitting the situation of pipe or disconnected pipe.
Summary of the invention
It is contemplated that one of technical problem solved at least to a certain extent in correlation technique.For this, the present invention proposes the control method of a kind of air-conditioner, can effectively reduce compressor piping stress when air-conditioner is shut down to a certain extent.
The control method of air-conditioner according to embodiments of the present invention; described air-conditioner includes off-premises station and indoor set; described off-premises station includes compressor; described indoor set includes the restricting element for coolant is throttled; described control method comprises the steps: S1: receive halt instruction; the current operation frequency F of detection compressor and the current operating parameter of off-premises station, wherein current operating parameter is at least one in currently running pressure reduction, currently running pressure ratio and present input current；S2: the current operating parameter of the current operation frequency F of compressor and the shutdown frequency value F S of setting, off-premises station is compared with setting shutdown parameter；S3: when meeting F≤FS and current operating parameter less than or equal to, when setting the halt condition of at least one shut down in parameter, controlling inverter and stop output；If halt condition described in not met, then according to predetermined frequency reducing speed FRS, described compressor is carried out frequency reducing until meeting described halt condition, and persistently set after time FST, control described inverter and stop output.
The control method of air-conditioner according to embodiments of the present invention, can effectively reduce compressor piping stress when air-conditioner is shut down to a certain extent, extend the service life of compressor piping.
In some embodiments of the invention, in step s3, when halt condition described in not met but detect when the frequency reducing time of compressor meets predetermined time value, control described inverter stop output.
In some embodiments of the invention, when described restricting element aperture can timing, control inverter stop output while, the aperture of described restricting element is increased in compressor frequency reducing process or before frequency reducing and regulates to target aperture.
In some embodiments of the invention, the span of described predetermined frequency reducing speed FRS is FRS≤5Hz/s.
In some embodiments of the invention, the described span setting time FST is as FST≤30s.
In some embodiments of the invention, the span of described shutdown frequency value F S is FS≤40Hz.
In some embodiments of the invention, when described current operating parameter includes currently running pressure reduction, described setting shuts down the span setting shutdown pressure differential deltap PS in parameter as Δ PS≤1.5Mpa.
In some embodiments of the invention, when described current operating parameter includes currently running pressure ratio, described setting shuts down the span setting shutdown pressure ratio PRS in parameter as PRS≤2.5.
Accompanying drawing explanation
Fig. 1 is the flow chart of the control method of air-conditioner according to embodiments of the present invention；
Fig. 2 is the schematic diagram of air-conditioner according to an embodiment of the invention.
Accompanying drawing labelling:
Air-conditioner 100, compressor 1, restricting element 2, indoor heat exchanger 3, indoor fan 4, outdoor heat exchanger 5, outdoor fan 6, cross valve 7.
Detailed description of the invention
Being described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings.The embodiment described below with reference to accompanying drawing is illustrative of, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
Additionally, term " first ", " second " are only for descriptive purposes, and it is not intended that indicate or imply relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, for instance two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or integral；Can be mechanically connected, it is also possible to be electrical connection or each other can communication；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be connection or the interaction relationship of two elements of two element internals, unless otherwise clear and definite restriction.For the ordinary skill in the art, it is possible to understand above-mentioned term concrete meaning in the present invention as the case may be.
Describe the control method of air-conditioner according to embodiments of the present invention below with reference to Fig. 1 and Fig. 2, wherein air-conditioner 100 includes off-premises station and indoor set, and off-premises station includes compressor 1, and indoor set includes the restricting element 2 for coolant is throttled.As in figure 2 it is shown, indoor set also includes indoor heat exchanger 3 and indoor fan 4, off-premises station also includes outdoor heat exchanger 5 and outdoor fan 6, when air-conditioner is heating and air conditioner, as in figure 2 it is shown, off-premises station also includes cross valve 7.Of course, it should be understood that air-conditioner can also be single cold type air-conditioner.
The control method of air-conditioner according to embodiments of the present invention, comprises the steps:
S1: receiving halt instruction, the current operation frequency F of detection compressor and the current operating parameter of off-premises station, wherein current operating parameter is at least one in currently running pressure reduction, currently running pressure ratio and present input current.It is understood that above-mentioned currently running pressure reduction refers to the pressure reduction of high-pressure side and low-pressure side, above-mentioned currently running pressure ratio refers to the pressure ratio of high-pressure side and low-pressure side.It is understood that any means can be adopted to detect currently running pressure reduction, currently running pressure ratio and present input current.Such as shown in Figure 2, when detecting the currently running pressure reduction of off-premises station and/or currently running pressure ratio, it is possible at the exhaustor of compressor and muffler place, one pressure transducer (in Fig. 2 shown in H and L) is respectively set to detect the pressure of high-pressure side and low-pressure side to obtain pressure reduction and/or pressure ratio.
Need illustrate be; above-mentioned halt instruction is not limited to artificial switching on and shutting down instruction; also include protection halt instruction and Da Wen halt instruction; it is to say, halt instruction includes but not limited to various protection halt instructions that user passes through remote controller or guidance panel sends shutdown command, frequency-variable controller send according to air-conditioner operation conditions and reaches temperature halt instruction (halt instruction namely sent when refrigerating/heating temperature reaches the temperature value set by user).
S2: the current operating parameter of the current operation frequency F of compressor and the shutdown frequency value F S of setting, off-premises station is compared with setting shutdown parameter.It is understood that when the current operating parameter of detection is currently running pressure ratio, then sets shutdown parameter accordingly and shut down pressure ratio as setting；When the current operating parameter of detection is currently running pressure reduction, then sets shutdown parameter accordingly and shut down pressure reduction as setting；When the current operating parameter of detection is present input current, then sets shutdown parameter accordingly and shut down input current as setting.Wherein it will also be appreciated that; design parameter in current operating parameter should be compared with corresponding setting shutdown parameter, for instance currently running pressure reduction and setting shutdown pressure reduction are compared, currently running pressure ratio and setting shutdown pressure ratio are compared, present input current and setting shutdown input current are compared.Preferably, the span shutting down frequency value F S is FS≤40Hz.It is further preferred that the span shutting down frequency value F S is 10Hz≤FS≤40Hz.Such as shutting down frequency value F S can be the parameters such as 15Hz, 20Hz, 30Hz or 35Hz.
S3: when meeting F≤FS and current operating parameter less than or equal to, when setting the halt condition of at least one shut down in parameter, controlling inverter and stop output.It is to say, halt condition is F≤FS and/or current operating parameter shuts down parameter less than or equal to setting.
If not met halt condition, then compressor is carried out frequency reducing until meeting halt condition according to predetermined frequency reducing speed FRS, and persistently set after time FST, control inverter and stop output.When controlling inverter and stopping output, compressor is out of service.Preferably, the span of predetermined frequency reducing speed FRS is FRS≤5Hz/s, and further, the span of predetermined frequency reducing speed FRS is 0.2Hz/s≤FRS≤5Hz/s.Such as, predetermined frequency reducing speed FRS can be the parameters such as 0.5Hz/s, 1Hz/s, 2Hz/s, 4Hz/s or 4.5Hz/s.Alternatively, set the span of time FST as FST≤30s, further, set the span of time FST as 10s≤FST≤30s, for instance setting time FST can be the parameters such as 15s, 20s, 25s or 28s.
Illustrative for meeting one of them for current operating parameter for currently running pressure differential deltap P and halt condition below.
After air-conditioner receives halt instruction, first detect the current operation frequency F of compressor and the currently running pressure differential deltap P of off-premises station.Then current operation frequency F is compared with setting shutdown frequency value F S and with setting, currently running pressure differential deltap P is shut down pressure differential deltap PS and compare.
If F≤FS or Δ P≤Δ PS, then directly stopping the output of inverter, compressor is directly out of service.
If F > FS or Δ P > Δ PS; then according to predetermined frequency reducing speed FRS, compressor is carried out frequency reducing; the detection current operation frequency of compressor, currently running pressure reduction shutdown frequency value F S and setting with setting are shut down pressure reduction and are compared in real time simultaneously; until meeting F≤FS or Δ P≤Δ PS; then after persistently setting time FST; stopping the output of inverter, frequency-changeable compressor is out of service.
Ordinary circumstance lower frequency and two kinds of conditions of pressure reduction meet one of them and can meet stress requirement, but if counter stress has higher requirement, it is possible to setpoint frequency and two kinds of conditions of pressure reduction meet requirement simultaneously.Specific as follows:
If F≤FS and Δ P≤Δ PS, then directly stopping the output of inverter, compressor is directly out of service.
If F > FS and Δ P > Δ PS; then according to predetermined frequency reducing speed FRS, compressor is carried out frequency reducing; the detection current operation frequency of compressor, currently running pressure reduction shutdown frequency value F S and setting with setting are shut down pressure reduction and are compared in real time simultaneously; until meeting F≤FS and Δ P≤Δ PS; then after persistently setting time FST; stopping the output of inverter, frequency-changeable compressor is out of service.
It is understandable that, when current operating parameter is replaced by currently running pressure ratio and/or present input current, comparison principle is same as described above, simply changes comparison other, is not just therefore that control method when currently running pressure ratio and/or present input current repeats to comparison other here.In the concrete example of the present invention, to the air-conditioner with pressure transducer, it is possible to by the detection (namely comparing pressure reduction and/or pressure ratio) of running frequency and system pressure judges to carry out to stop compressor opportunity, it is judged that more accurate.
Need illustrate, predetermined frequency reducing speed FRS, shut down frequency value F S, set time FST, set shut down parameter concrete value can not Split type, to improve the versatility of program, naturally it is also possible to be set as variable element, according to type change.
Generally, transducer air conditioning runs according to load condition elder generation high frequency, and the condition that reaches reduces frequency energy-saving run.When running at low frequency, little and the unit interval the cooling system agent flux of angular momentum now is also little, and height pressure reduction is also relatively small, stops signal compressor when receiving, it is possible to directly stopping compressor and process, the stress that pipe arrangement produces can't exceed standard.When compressor high frequency runs or load is higher time; big and the unit interval the cooling system agent flux of angular momentum now is also big; height pressure reduction is also relatively large; when receiving stopping signal; if according to general processing mode; directly stopping compressor, the fierce shake that pipe arrangement can produce, piping stress easily exceeds standard.Because the flow system flow etc. of angular momentum, unit interval has direct relation with rotating speed size, the discharge capacity of compressor, air conditioner type, payload, it is possible to be reflected on the pressure of frequency and system.
The control method of air-conditioner according to embodiments of the present invention, directly do not shut down after receiving halt instruction, and be by judging, the shutdown frequency values of the current operating parameter of the current operation frequency of compressor and off-premises station and setting and setting are shut down parameter compare, just shut down when meeting halt condition, if not met halt condition, then compressor carried out frequency reducing until meeting halt condition and persistently after the setting time according to setting frequency reducing speed, shut down again, such that it is able to shut down again after the current operation frequency of compressor is reduced to low frequency, frequency reducing downtime can be shortened when air-conditioner system load variations, adapt to the demand of different operating mode；Prevent from shutting down underfrequency frequency reducing overlong time, improve the program versatility to different type of machines.
To sum up analyze it can be seen that the control method of air-conditioner according to embodiments of the present invention, can effectively reduce compressor piping stress when air-conditioner is shut down to a certain extent, extend the service life of compressor piping.
In some embodiments of the invention, in step s3, when not met halt condition but detect when the frequency reducing time of compressor meets predetermined time value, control inverter stop output.That is; in the frequency reducing process of compressor; if not met halt condition still detects when the frequency reducing time of compressor reaches the scheduled time all the time; then force to stop compressor; such that it is able to prevent current operation frequency F and the special circumstances of off-premises station current operating parameter detection inefficacy, improve the reliability of the control method of air-conditioner.
In some embodiments of the invention, when restricting element aperture can timing, control inverter stop output while, the aperture of restricting element is increased in compressor frequency reducing process or before frequency reducing and regulates to target aperture.Thereby through the aperture increasing restricting element, it is possible to make the pressure reduction of air-conditioner reduce, faster reach halt condition.Specifically, restricting element can be electric expansion valve.
In some embodiments of the invention, when current operating parameter includes currently running pressure reduction, set the span setting shutdown pressure differential deltap PS of shutting down in parameter as Δ PS≤1.5Mpa.Further, the span shutting down pressure differential deltap PS is set as 0.5Mpa≤Δ PS≤1.5Mpa, for instance setting and shut down pressure differential deltap PS can be the parameters such as 0.8Mpa, 1Mpa, 1.2Mpa or 1.4Mpa.
In some embodiments of the invention, when current operating parameter includes currently running pressure ratio, set the span setting shutdown pressure ratio PRS shutting down in parameter as PRS≤2.5.Pressure ratio PRS > 1 is shut down it is understood that set.Specifically, set that to shut down pressure ratio PRS can be the parameters such as 1.5,1.8,2 or 2.3.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention.In this manual, the schematic representation of above-mentioned term is necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature can combine in one or more embodiments in office or example in an appropriate manner.Additionally, when not conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be carried out combining and combining by those skilled in the art.
Although above it has been shown and described that embodiments of the invention, it is understandable that, above-described embodiment is illustrative of, it is impossible to be interpreted as limitation of the present invention, and above-described embodiment can be changed, revises, replace and modification by those of ordinary skill in the art within the scope of the invention.
Claims (8)
1. the control method of an air-conditioner, it is characterised in that described air-conditioner includes off-premises station and indoor set, described off-premises station includes compressor, and described indoor set includes the restricting element for coolant is throttled, and described control method comprises the steps:
S1: receiving halt instruction, the current operation frequency F of detection compressor and the current operating parameter of off-premises station, wherein current operating parameter is at least one in currently running pressure reduction, currently running pressure ratio and present input current；
S2: the current operating parameter of the current operation frequency F of compressor and the shutdown frequency value F S of setting, off-premises station is compared with setting shutdown parameter；
S3: when meeting F≤FS and current operating parameter less than or equal to, when setting the halt condition of at least one shut down in parameter, controlling inverter and stop output；
If halt condition described in not met, then according to predetermined frequency reducing speed FRS, described compressor is carried out frequency reducing until meeting described halt condition, and persistently set after time FST, control described inverter and stop output.
2. the control method of air-conditioner according to claim 1, it is characterised in that in step s3, when halt condition described in not met but detect when the frequency reducing time of compressor meets predetermined time value, control described inverter stop output.
3. the control method of air-conditioner according to claim 1, it is characterized in that, when described restricting element aperture can timing, control inverter stop output while, the aperture of described restricting element is increased in compressor frequency reducing process or before frequency reducing and regulates to target aperture.
4. the control method of air-conditioner according to claim 1, it is characterised in that the span of described predetermined frequency reducing speed FRS is FRS≤5Hz/s.
5. the control method of air-conditioner according to claim 1, it is characterised in that the described span setting time FST is as FST≤30s.
6. the control method of air-conditioner according to claim 1, it is characterised in that the span of described shutdown frequency value F S is FS≤40Hz.
7. the control method of air-conditioner according to claim 1, it is characterised in that when described current operating parameter includes currently running pressure reduction, described setting shuts down the span setting shutdown pressure differential deltap PS in parameter as Δ PS≤1.5Mpa.
8. the control method of air-conditioner according to claim 1, it is characterised in that when described current operating parameter includes currently running pressure ratio, described setting shuts down the span setting shutdown pressure ratio PRS in parameter as PRS≤2.5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610119730.2A CN105757884A (en) | 2016-03-02 | 2016-03-02 | Control method of air conditioner |
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| CN201610119730.2A CN105757884A (en) | 2016-03-02 | 2016-03-02 | Control method of air conditioner |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107421055A (en) * | 2017-05-04 | 2017-12-01 | 广东美的制冷设备有限公司 | Convertible frequency air-conditioner, halt control method and computer-readable recording medium |
| WO2018090775A1 (en) * | 2016-11-18 | 2018-05-24 | 珠海格力电器股份有限公司 | Air conditioner control method and device and air conditioner |
| CN108758964A (en) * | 2018-05-18 | 2018-11-06 | 武汉海尔电器股份有限公司 | The halt control method and device of compressor of air conditioner |
| WO2018201625A1 (en) * | 2017-05-04 | 2018-11-08 | 广东美的制冷设备有限公司 | Variable-frequency air conditioner, shutdown control method, and computer readable storage medium |
| CN111780362A (en) * | 2020-07-03 | 2020-10-16 | 海信（山东）空调有限公司 | Air conditioner and control method thereof |
| CN112248742A (en) * | 2020-09-21 | 2021-01-22 | 珠海格力电器股份有限公司 | Control method, device, equipment and medium for prolonging endurance time of vehicle-mounted air conditioner |
| CN113465098A (en) * | 2021-05-21 | 2021-10-01 | 宁波奥克斯电气股份有限公司 | Control method and device for optimizing shutdown airflow sound of compressor and air conditioner |
| CN115095952A (en) * | 2022-06-30 | 2022-09-23 | 北京小米移动软件有限公司 | Shutdown control method and device of air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018090775A1 (en) * | 2016-11-18 | 2018-05-24 | 珠海格力电器股份有限公司 | Air conditioner control method and device and air conditioner |
| CN107421055A (en) * | 2017-05-04 | 2017-12-01 | 广东美的制冷设备有限公司 | Convertible frequency air-conditioner, halt control method and computer-readable recording medium |
| WO2018201625A1 (en) * | 2017-05-04 | 2018-11-08 | 广东美的制冷设备有限公司 | Variable-frequency air conditioner, shutdown control method, and computer readable storage medium |
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| CN112248742A (en) * | 2020-09-21 | 2021-01-22 | 珠海格力电器股份有限公司 | Control method, device, equipment and medium for prolonging endurance time of vehicle-mounted air conditioner |
| CN113465098A (en) * | 2021-05-21 | 2021-10-01 | 宁波奥克斯电气股份有限公司 | Control method and device for optimizing shutdown airflow sound of compressor and air conditioner |
| CN115095952A (en) * | 2022-06-30 | 2022-09-23 | 北京小米移动软件有限公司 | Shutdown control method and device of air conditioner |
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Application publication date: 20160713 |