CN112032941A - Control method of air conditioner - Google Patents
Control method of air conditioner Download PDFInfo
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- CN112032941A CN112032941A CN202010864200.7A CN202010864200A CN112032941A CN 112032941 A CN112032941 A CN 112032941A CN 202010864200 A CN202010864200 A CN 202010864200A CN 112032941 A CN112032941 A CN 112032941A
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- air conditioner
- current value
- outdoor
- condition
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Classifications
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
Abstract
The invention discloses a control method of an air conditioner, which comprises the following steps: controlling the compressor to operate; detecting the current value of an outdoor fan, and judging whether the current frosting condition needs defrosting or not according to the current value of the outdoor fan; if so, the outdoor ambient temperature T is detectedOuter ringAnd the temperature T of the coil of the outdoor heat exchangerCoil pipeAccording to the outdoor ambient temperature TOuter ringAnd said outdoor heat exchanger coil temperature TCoil pipeJudging whether defrosting is carried out or not; and if so, controlling the air conditioner to defrost. According to the control method of the air conditioner, the accuracy of the defrosting time can be improved, so that the energy consumption is reduced, and the comfort is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner.
Background
Air conditioners in the related art, especially variable frequency air conditioners, have the problem that when heating operation is performed, if outdoor temperature is low (for example, lower than 0 ℃), condensed water of an outdoor heat exchanger can frost, and long-term frosting can affect normal heat exchange of the outdoor heat exchanger, so that heat exchange quantity is reduced, air outlet temperature is reduced, and comfort is deteriorated. The frosting condition is usually judged by detecting the environment temperature and the coil pipe temperature, the defrosting time is determined according to the judged frosting condition, but the condition that temperature measurement is inaccurate is judged only by depending on the environment temperature and the coil pipe temperature sensor, for example, the temperature sensing head is loosened, the defrosting time is deviated, if frosting is too much, the defrosting is started to defrost to bring long defrosting time, or the defrosting is carried out when no frost exists, and unnecessary energy consumption waste is caused.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a method for controlling an air conditioner, which can improve the accuracy of defrosting timing, thereby reducing energy consumption and improving comfort.
In order to achieve the above object, a control method of an air conditioner according to an embodiment of the present invention includes: controlling the compressor to operate; detecting the current value of an outdoor fan, and judging whether the current frosting condition needs defrosting or not according to the current value of the outdoor fan; if so, the outdoor ambient temperature T is detectedOuter ringAnd the temperature T of the coil of the outdoor heat exchangerCoil pipeAccording to the outdoor ambient temperature TOuter ringAnd said outdoor heat exchanger coil temperature TCoil pipeJudging whether defrosting is carried out or not; and if so, controlling the air conditioner to defrost.
According to the control method of the air conditioner, the accuracy of the defrosting time can be improved, so that the energy consumption is reduced, and the comfort is improved.
According to some embodiments of the present invention, the current value of the outdoor fan is detected after the compressor is controlled to operate for a first predetermined time.
According to some embodiments of the present invention, the detecting the current value of the outdoor fan includes: detecting the current value of the outdoor fan every third preset time within the second preset time, and calculating the average value of the current values of the outdoor fans detected for a plurality of timesIInitial。
Further, the detecting the current value of the outdoor fan further comprises: obtaining an average value I of current values of the outdoor fanInitialThen, the current value I of the outdoor fan is detected again at an interval of fourth preset timenCalculating delta I, where delta I ═ In-IFirst stageAnd (6) starting.
Further, the judging whether the current frosting condition needs defrosting according to the current value of the outdoor fan comprises: judging whether the condition A is met: delta I is greater than or equal to a preset current value IBooking(ii) a Judging whether the condition B is met: the operation time of the compressor reaches the minimum operation time tmin(ii) a And if the conditions A and B are both met, judging that the current frosting condition needs defrosting.
Further, the preset current value IBookingIs 0.02A to 0.08A.
According to some embodiments of the present invention, if the condition a is not satisfied, the current value I of the outdoor fan is detected every fifth predetermined timenAnd calculating the current time delta I until the current time delta I is more than or equal to the preset current value IBooking。
According to some embodiments of the invention, the minimum operation time t is reached at the operation time of the compressor if the condition a is satisfied and the condition B is not satisfied as described aboveminAnd then judging that the current frosting condition needs defrosting.
According to some embodiments of the invention, whether or not the above condition a is met, for example, the operation time of the compressor reaches the maximum operation time tmaxAnd controlling the air conditioner to perform defrosting.
According to some embodiments of the invention, said temperature is dependent on said outdoor ambient temperature TOuter ringAnd said outdoor heat exchanger coil temperature TCoil pipeJudging whether to defrost includes: judging whether the condition C is met: t isOuter ring-TCoil pipeNot less than a first preset temperature value TPreset 1(ii) a Judging whether the condition D is met: t isCoil pipeNot more than second preset temperature value TPreset 2(ii) a And controlling the air conditioner to execute defrosting if the conditions C and D are met.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A control method of an air conditioner according to an embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1, a control method of an air conditioner according to an embodiment of the present invention includes:
controlling the compressor to operate;
detecting the current value of the outdoor fan, and judging whether the current frosting condition needs defrosting or not according to the current value of the outdoor fan;
if so, the outdoor ambient temperature T is detectedOuter ringAnd the temperature T of the coil of the outdoor heat exchangerCoil pipeAccording to the outdoor ambient temperature TOuter ringAnd the temperature T of the coil of the outdoor heat exchangerCoil pipeJudging whether defrosting is carried out or not;
and if so, controlling the air conditioner to defrost.
The inventor of this application discovers through a large amount of research and experiments, the windage can be influenced to when the outdoor unit heat exchanger frosts and how much frosting, and the change of windage can be shown on the acting of outdoor fan, the electric current condition of acting through monitoring outdoor fan, judge whether outdoor heat exchanger frosts and the degree of frosting, can be more accurate predict frosting, judge again according to above and get into the defrosting, can improve defrosting control harmfully and the accurate defrosting that gets into, improve the complete machine and heat the effect and improve user experience.
Based on the above, according to the control method of the air conditioner provided by the embodiment of the invention, the frosting condition of the outdoor heat exchanger is preliminarily judged according to the current value of the outdoor fan, and then the outdoor environment temperature T is integratedOuter ringAnd outdoor heat exchanger coil temperature TCoil pipeAnd with the corresponding relation of the condition of frosting, through dual judgement, judge whether need the defrosting, so, can avoid single dependence ambient temperature and coil pipe temperature sensor and bring the influence that the temperature measurement is inaccurate to promote the defrosting and get into accuracy and precision, just get into the condition of defrosting when avoiding frosting too much and bring the time of defrosting long or not frosting, not only promoted the travelling comfort, can avoid the unnecessary energy consumption moreover.
Therefore, according to the control method of the air conditioner provided by the embodiment of the invention, the accuracy of the defrosting time can be improved, so that the energy consumption is reduced, and the comfort is improved.
In some embodiments of the present invention, as shown in fig. 1, the compressor is controlled to operate for a first predetermined time, and then the current value of the outdoor fan is detected. Wherein, the first preset time may be 3 minutes, and the current value of the outdoor fan starts to be recorded after the compressor operates for 3 minutes. The compressor keeps stable after working for the first preset time, the current value of the outdoor fan is detected at the moment, and the accuracy of detecting the current value of the outdoor fan can be ensured.
In some embodiments of the present invention, as shown in fig. 1, the detecting a current value of the outdoor fan includes:
detecting the current value of the outdoor fan every third preset time within the second preset time, and calculating the average value I of the current values of the outdoor fans detected for multiple timesInitial。
The second preset time can be 2 minutes, the third preset time can be set according to actual conditions, the shorter the third preset time is, the more the current value measurement times of the outdoor fan are, and the average value I of the current values of the outdoor fan isInitialThe more accurate the calculation. By passingDetecting the current value for multiple times within a second preset time, and calculating the average value I of the current values of the outdoor fans detected for multiple timesInitialAverage value I of current value of outdoor fanInitialAs a parameter for subsequent judgment, the accuracy of the defrosting time can be further improved.
Further, as shown in fig. 1, detecting the current value of the outdoor fan further includes:
obtaining the average value I of the current value of the outdoor fanInitialThen, the current value I of the outdoor fan is detected again at an interval of fourth preset timenCalculating delta I, where delta I ═ In-IInitial。
Wherein, the fourth predetermined time may be 40 seconds, that is, the sampling period of the current value of the outdoor fan is 40 seconds, and the current value I of the outdoor fan is calculatednAverage value I of current value of outdoor fanInitialAnd calculating the variation delta I of the current value of the outdoor fan. The variable quantity delta I of the current value of the outdoor fan can accurately reflect the frosting condition of the air conditioner, and therefore more accurate judgment parameters are provided for subsequent judgment.
Further, as shown in fig. 1, judging whether the current frosting condition needs defrosting according to the current value of the outdoor fan includes:
judging whether the condition A is met: delta I is greater than or equal to a preset current value IBooking；
Judging whether the condition B is met: the operation time of the compressor reaches the minimum operation time tmin；
And if the conditions A and B are both met, judging that the current frosting condition needs defrosting.
For example, the predetermined current value IBookingIs 0.02A to 0.08A.
Wherein the preset current value IBookingThe data is measured according to the actual model, and the variation quantity delta I of the current value of the outdoor fan and the preset current value I are measuredBookingComparing if delta I is greater than or equal to a preset current value IBookingIf the condition A is satisfied, the judgment of the condition B is continued. And the degree of the frosting speed of the outdoor fan can be judged according to the time required for reaching the condition A, so as to reach the aim thatShorter time to condition a indicates faster frosting. Further, if the compressor operation time reaches the minimum operation time tminIf the conditions A and B are met, the current frosting condition needs defrosting.
It can be understood that the judging sequence of the condition a and the condition B can be adjusted according to the actual situation, and the accuracy of the air conditioner control method is not affected.
In some embodiments of the present invention, as shown in fig. 1, if the condition a is not satisfied, the current value I of the outdoor fan is detected once every fifth predetermined time intervalnAnd calculating the current time delta I until the current time delta I is more than or equal to the preset current value IBooking。
The fifth preset time may be the same as the fourth preset time, and may be, for example, 40 seconds. By detecting the current value I of the outdoor fan in real timenAnd calculating the delta I, so that whether defrosting is needed or not can be found in time, misjudgment caused by the change of the delta I is prevented, and the detection accuracy is ensured.
In some embodiments of the invention, as shown in FIG. 1, if condition A is satisfied and condition B is not satisfied as described above, then the minimum operating time t is reached at the operating time of the compressorminAnd then judging that the current frosting condition needs defrosting.
The compressor operation time does not reach the minimum operation time tminIn time, the measured data is inaccurate, and in order to ensure the judgment accuracy and prevent the misjudgment, the running time of the compressor reaches tminAnd then, judging that the current frosting condition needs defrosting, thereby improving the accuracy of defrosting time.
In some embodiments of the present invention, as shown in FIG. 1, the compressor operation time reaches the maximum operation time t, for example, regardless of whether the above condition A is satisfied or notmaxAnd controlling the air conditioner to perform defrosting. So, also can carry out the defrosting even the sensor misjudge, avoid because the misjudge of sensor leads to having the frost not to remove, and then guaranteed that outdoor heat exchanger does not frost in order to guarantee the travelling comfort.
In some embodiments of the invention, the outdoor ambient temperature T is based onOuter ringExchange heat with outdoorTemperature T of coil pipeCoil pipeJudging whether to defrost includes:
judging whether the condition C is met: t isOuter ring-TCoil pipeNot less than a first preset temperature value TPreset 1；
Judging whether the condition D is met: t isCoil pipeNot more than second preset temperature value TPreset 2；
And controlling the air conditioner to execute defrosting if the conditions C and D are met.
For example, the first preset temperature value TPreset 1Can be 8 ℃, and a second preset temperature value TPreset 2Can be at-2 ℃ and outdoor environment temperature TOuter ringAnd the temperature T of the coil of the outdoor heat exchangerCoil pipeThe defrosting judgment result according to the current value of the outdoor fan is confirmed again by detecting through the temperature sensor and judging whether the condition C and the condition D are met, so that the accuracy of judging defrosting is further ensured.
When judging the outdoor environment temperature TOuter ringAnd the temperature T of the coil of the outdoor heat exchangerCoil pipeIs greater than or equal to a first preset temperature value TPreset 1While at the same time TCoil pipeNot higher than a second preset temperature value TPreset 2At this time, the ambient temperature reaches a necessary temperature required for frosting, and the outdoor ambient temperature T is setOuter ringTemperature T of coil pipe of outdoor heat exchangerCoil pipeThere is a sufficient temperature difference that is sufficient to perform defrosting.
It can be understood that the judging sequence of the condition C and the condition D can be adjusted according to the actual situation, and the accuracy of the air conditioner control method is not affected.
According to the control method of the air conditioner, the logic (software) of the control method can be written into the control chip of the air conditioner.
The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. The air conditioner is used as a heater in a heating mode when the indoor heat exchanger is used as a condenser, and as a cooler in a cooling mode when the indoor heat exchanger is used as an evaporator.
In the description herein, references to the description of "a particular embodiment," "a particular example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A method of controlling an air conditioner, comprising:
controlling the compressor to operate;
detecting the current value of an outdoor fan, and judging whether the current frosting condition needs defrosting or not according to the current value of the outdoor fan;
if so, the outdoor ambient temperature T is detectedOuter ringAnd the temperature T of the coil of the outdoor heat exchangerCoil pipeAccording to the outdoor ambient temperature TOuter ringAnd said outdoor heat exchanger coil temperature TCoil pipeJudging whether defrosting is carried out or not;
and if so, controlling the air conditioner to defrost.
2. The control method of an air conditioner according to claim 1, wherein the current value of the outdoor fan is detected after the compressor is controlled to operate for a first predetermined time.
3. The control method of an air conditioner according to claim 1, wherein the detecting a current value of the outdoor fan includes:
detecting the current value of the outdoor fan every third preset time within the second preset time, and calculating the average value I of the current values of the outdoor fans detected for multiple timesInitial。
4. The control method of an air conditioner according to claim 3, wherein the detecting a current value of the outdoor fan further comprises:
obtaining an average value I of current values of the outdoor fanInitialThen, the current value I of the outdoor fan is detected again at an interval of fourth preset timenCalculating delta I, where delta I ═ In-IInitial。
5. The method for controlling an air conditioner according to claim 4, wherein the determining whether the current frosting condition requires defrosting according to the current value of the outdoor fan comprises:
judging whether the condition A is met: delta I is greater than or equal to a preset current value IBooking；
Judging whether the condition B is met: of compressorsThe running time reaches the minimum running time tmin；
And if the conditions A and B are both met, judging that the current frosting condition needs defrosting.
6. The control method of an air conditioner according to claim 5, wherein the preset current value IBookingIs 0.02A to 0.08A.
7. The method of claim 5, wherein if the condition A is not satisfied, the current value I of the outdoor fan is detected every fifth predetermined time periodnAnd calculating the current time delta I until the current time delta I is more than or equal to the preset current value IBooking。
8. The control method of an air conditioner according to claim 5, wherein the minimum operation time t is reached at the operation time of the compressor if the above condition A is satisfied and the condition B is not satisfiedminAnd then judging that the current frosting condition needs defrosting.
9. The control method of air conditioner according to claim 5, wherein the operation time of the compressor reaches the maximum operation time t, regardless of whether the condition A is satisfied or notmaxAnd controlling the air conditioner to perform defrosting.
10. The control method of an air conditioner according to any one of claims 1-9, wherein said control is performed according to said outdoor ambient temperature TOuter ringAnd said outdoor heat exchanger coil temperature TCoil pipeJudging whether to defrost includes:
judging whether the condition C is met: t isOuter ring-TCoil pipeNot less than a first preset temperature value TPreset 1；
Judging whether the condition D is met: t isCoil pipeNot more than second preset temperature value TPreset 2；
And controlling the air conditioner to execute defrosting if the conditions C and D are met.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112524747A (en) * | 2020-12-08 | 2021-03-19 | 海信（广东）空调有限公司 | Defrosting control method of air conditioner, indoor unit of air conditioner and air conditioner remote controller |
| CN114909775A (en) * | 2022-03-25 | 2022-08-16 | 北京小米移动软件有限公司 | Desktop air conditioner, defrosting control method and device of desktop air conditioner and storage medium |
| WO2023029594A1 (en) * | 2021-08-30 | 2023-03-09 | 青岛海尔空调电子有限公司 | Method and apparatus for defrosting water heater, water heater, and storage medium |
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