CN108692425B - Defrosting control method for air conditioner - Google Patents
Defrosting control method for air conditioner Download PDFInfo
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- CN108692425B CN108692425B CN201810558876.6A CN201810558876A CN108692425B CN 108692425 B CN108692425 B CN 108692425B CN 201810558876 A CN201810558876 A CN 201810558876A CN 108692425 B CN108692425 B CN 108692425B
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- defrosting
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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
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/62—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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner. In order to prevent the room temperature from fluctuating too much during defrosting, the defrosting control method of the invention comprises the following steps: calculating the accumulated power consumption W of the air conditioner in real time from the first time the air conditioner enters the defrosting mode after startingAccumulation(ii) a Comparing the accumulated consumed power WAccumulationAnd judging whether the air conditioner enters the defrosting mode again according to the comparison result with the preset consumed power W. The invention can more accurately judge the time when the air conditioner enters the defrosting mode by taking the preset consumed power W as the reference, thereby avoiding the frequent defrosting phenomenon. And the influence on the indoor temperature in the defrosting process can be reduced to the maximum extent according to the accumulated power consumption of the air conditioner, so that the indoor temperature cannot fluctuate greatly.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner.
Background
The air conditioner as a device capable of adjusting the indoor environment temperature has the working principle that: the indoor environment temperature is lowered or raised by the refrigerant switching between the circulation lines through the high pressure/low pressure/gas/liquid state, namely, the air conditioner is in the cooling or heating working condition from the perspective of the indoor unit. When the air conditioner heats the operation, if outdoor coil pipe temperature under certain humidity condition crosses lowly can lead to the condition of frosting, and outdoor coil pipe frosting can lead to outdoor heat exchanger's heat exchange efficiency to reduce, influences the heating effect of air conditioner, reduces indoor environment's travelling comfort, influences user experience. Therefore, in the situation that the air conditioner is in the heating working condition, the outdoor coil of the air conditioner needs to be defrosted timely and effectively.
In the operation heating process of the existing household air conditioner, if the outdoor humidity is high, the condition of frosting is achieved, the outdoor unit can be frosted, the running power of the air conditioner is directly influenced by frosting, namely when the outdoor unit is frosted, the running power of the air conditioner is reduced, the indoor heating quantity is reduced, and the indoor temperature is directly influenced. The existing air conditioner generally utilizes the running time plus the temperature of an outdoor coil to judge whether defrosting is started or not, but the mode cannot directly reflect the change of the indoor temperature, and the indoor temperature really influences the user experience.
The present invention has been made in view of the above circumstances.
Disclosure of Invention
In order to solve the above problems in the prior art and to prevent the room temperature from fluctuating too much during defrosting, the invention provides a defrosting control method of an air conditioner, which comprises the following steps: calculating the accumulated power consumption W of the air conditioner in real time from the first time the air conditioner enters the defrosting mode after startingAccumulation(ii) a Comparing the accumulated consumed power WAccumulationAnd judging whether the air conditioner enters the defrosting mode again according to the comparison result with the preset consumed power W.
In a preferred embodiment of the above-described defrosting control method for an air conditioner, "comparing the cumulative consumed power WAccumulationAnd judging whether the air conditioner enters the defrosting mode again according to the comparison result with the preset consumed power W, wherein the step of judging whether the air conditioner enters the defrosting mode again comprises the following steps: if 0.9 W.ltoreq.WAccumulationIf W is less than W, the operation frequency of the compressor is reduced, and the heating operation is continued.
In the above-mentioned preferred embodiment of the defrosting control method of the air conditioner, if 0.9W ≦ WAccumulationIf W is less than the preset value, the running frequency of the compressor is reduced by 20 percent.
In a preferred embodiment of the above-described defrosting control method for an air conditioner, the step of "comparing the integrated power consumption W with a preset power consumption W and determining whether to enter the air conditioner into the defrosting mode again based on the comparison result" includes: if W isAccumulationAnd if the pressure is larger than or equal to W, the air conditioner is enabled to enter the defrosting mode again.
In a preferred embodiment of the above-described air conditioner defrosting control method, the preset consumed power W is determined by: setting a defrosting starting judgment condition; when the judgment condition is met, the air conditioner enters a defrosting mode; calculating the accumulated power consumption W of the air conditioner between two adjacent defrosting modesn(ii) a Calculating a plurality of accumulated consumptions WnTaking the average value as the preset consumed power W.
In a preferred embodiment of the above-described air conditioner defrosting control method, the step of "setting a judgment condition for entering defrosting" includes: the condition for making the air conditioner enter the defrosting mode is set according to the temperature of the coil of the outdoor unit.
In the above-described preferred embodiment of the defrosting control method of the air conditioner, the "plurality of accumulated consumed powers W are calculatednThe average value of "a plurality of accumulated consumed powers W" in the step of setting the average value as the preset consumed power Wn"comprises at least W1、W2、W3。
In the preferred embodiment of the defrosting control method for the air conditioner, the accumulated consumed power W of the air conditioner is calculated in real time from the first time the air conditioner enters the defrosting mode after being startedAccumulationIn the step (1), the first time of entering the defrosting mode after the air conditioner is started is the preset time.
In a preferred embodiment of the above defrosting control method for an air conditioner, the preset time is determined according to the following steps: acquiring the type of an air conditioner and the external environment temperature and humidity value of an application scene of the air conditioner; and obtaining the time for the air conditioner to enter the defrosting mode for the first time after the air conditioner is started through tests according to the model of the air conditioner and the external environment temperature and humidity value of the application scene.
In a preferred embodiment of the above-described defrosting control method for an air conditioner, the defrosting control method further includes: when the condition of entering a defrosting mode is met, the four-way valve is reversed to defrost; wherein, the time of each defrosting mode is a preset fixed time
The invention calculates the accumulated power consumption W of the air conditionerAccumulationAnd comparing with the preset power consumption W to judge the accumulated power consumption W of the air conditionerAccumulationTo the extent that defrosting needs to be performed again. The time when the air conditioner enters the defrosting mode can be more accurately judged by taking the preset consumed power W as a reference, and the frequent defrosting phenomenon is avoided. And the influence on the indoor temperature in the defrosting process can be reduced to the maximum extent according to the accumulated power consumption of the air conditioner, so that the indoor temperature cannot fluctuate greatly.
Drawings
Fig. 1 is a main flowchart of a defrosting control method of an air conditioner according to the present invention.
Detailed Description
In order to make the embodiments, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the embodiments are some, but not all embodiments of the present invention. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
As shown in fig. 1, the defrosting control method of an air conditioner of the present invention includes the steps of: s110, calculating the accumulated power consumption W of the air conditioner in real time from the first time the air conditioner enters the defrosting mode after being startedAccumulation(ii) a S120, comparing the accumulated power consumption WAccumulationAnd judging whether the air conditioner enters the defrosting mode again according to the comparison result with the preset consumed power W. As can be understood by those skilled in the art, the air conditioner is operated for one operation period from the time when the air conditioner enters the defrost mode to the time when the defrost mode is next entered, the period including the defrost mode and the heating mode, and if the air conditioner performs the defrost mode at the right time, the accumulated time during one operation period of the air conditioner is increasedThe consumed power may be regarded as fixed, that is, the accumulated consumed power of the air conditioner during one operation period is the preset consumed power W. Therefore, the accumulated power consumption W of the air conditioner is calculated from the first time the air conditioner enters the defrosting mode after being startedAccumulationComparison WAccumulationAnd the value of W can accurately judge whether to make the air conditioner enter the defrosting mode again.
As an example, the preset consumption power W may be determined by: firstly, the judgment condition for entering the defrosting is set, for example, the condition for leading the air conditioner to enter the defrosting mode is set according to the temperature of the coil pipe of the outdoor unit. When the judgment condition is satisfied, the air conditioner is enabled to enter a defrosting mode, and then the accumulated consumed power W of the air conditioner is calculatednWhen the judgment condition is satisfied again, the currently calculated accumulated power consumption W is calculatednIs preserved as W1(ii) a Then, the accumulated power consumption W of the air conditioner is recalculated from the time when the air conditioner enters the defrosting modenWhen the judgment condition is satisfied again, the currently calculated accumulated power consumption W is calculatednIs preserved as W2(ii) a By analogy, the accumulated consumed power W of the air conditioner between two adjacent defrosting modes can be calculated1、W2、W3…Wn(ii) a Then, the accumulated power consumption W is calculated1、W2、W3…WnThe average value is the preset power consumption W.
It will be understood by those skilled in the art that the accumulated power consumption of the air conditioner may be calculated by way of integration, and a detailed calculation method will not be described herein. The accumulated power consumption of the multiple groups of air conditioners in each operation period (the operation period is that the air conditioners are defrosted from entering the defrosting to entering the defrosting again next time) is obtained through tests, and the more data obtained through the tests, the more accurate the preset power consumption W is. In addition, any reasonable judgment condition can be flexibly selected as to the judgment condition of defrosting set in the test process, and the judgment condition does not depart from the protection scope of the invention.
In step S120, when 0.9W ≦ WAccumulationWhen the frequency is less than W, the operation frequency of the compressor can be reduced at the moment, and the heating operation can be continued, for exampleIf the running frequency of the compressor is reduced by 20 percent, the defrosting time can be delayed. When W isAccumulationAnd if the accumulated consumed power of the air conditioner reaches the preset consumed power W, the air conditioner can be defrosted, and the air conditioner enters the defrosting mode again at the moment.
It should be noted that, in step S110, the time for the air conditioner to enter the defrosting mode for the first time after being turned on may be a preset time. For example, a designer obtains the time for the air conditioner to enter the defrosting mode for the first time after starting up through a test according to the model of the air conditioner and the external environment temperature and humidity value of the application scene of the air conditioner. For example, the air conditioner is operated in a target environment, the frosting condition of the air conditioner is observed, then the defrosting time is recorded, the model of the air conditioner, the external environment temperature and the humidity value are correspondingly recorded, and the time for the air conditioner to enter the defrosting for the first time after the air conditioner is started can be finally determined through data obtained by carrying out a plurality of groups of tests. The skilled person can also flexibly select other reasonable test methods to obtain the time for the air conditioner to enter into defrosting for the first time after being turned on, and a detailed description is omitted here.
As an example, the defrosting control method of the air conditioner adopts a shutdown defrosting mode, namely when the condition of entering a defrosting mode is met, the four-way valve is used for reversing to defrost. The time for each defrost is set to a fixed time. In the defrosting mode, the air conditioner does not heat, and the air conditioner does not consume power, so the calculation of the accumulated power consumption W of the air conditioner can be restarted after the first defrosting mode is finishedAccumulation. It is easily understood by those skilled in the art that in this mode, since the accumulated consumed power in the defrost mode is 0, the accumulated consumed power Q of the air conditioner is calculated even from the start of entering the defrost modeAccumulationThe judgment result is not affected.
As an example, if the defrosting control method of the air conditioner of the present invention adopts a non-stop defrosting mode, that is, when the condition for entering the defrosting mode is satisfied, the bypass pipeline is opened to defrost, that is, the air conditioner heats the indoor space and simultaneously uses the bypass pipeline to defrost the outdoor unit. At this time, due toThe air conditioner still has a part of heating capacity in the defrosting mode, namely consumes a part of power, so that the accumulated consumed power W of the air conditioner can be calculated when the first defrosting mode is startedAccumulation. It will be understood by those skilled in the art that if the power consumed by the air conditioner in the defrost mode is not considered when determining the preset consumed power W, the calculation of the cumulative consumed power W of the air conditioner may be resumed after the defrost mode is ended when the non-stop defrost mode is employedAccumulation。
In summary, the present invention calculates the cumulative power consumption W of the air conditionerAccumulationAnd comparing with the preset power consumption W to judge the accumulated power consumption W of the air conditionerAccumulationTo the extent that defrosting needs to be performed again. The time when the air conditioner enters the defrosting mode can be more accurately judged by taking the preset consumed power W as a reference, and the frequent defrosting phenomenon is avoided. And the influence on the indoor temperature in the defrosting process can be reduced to the maximum extent according to the accumulated power consumption of the air conditioner, so that the indoor temperature cannot fluctuate greatly.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (9)
1. A defrosting control method of an air conditioner is characterized by comprising the following steps:
starting from the first defrosting mode after the air conditioner is started, defrosting is started to the next time, the defrosting is started to be an operation period, and the accumulated power consumption W of the air conditioner in each operation period is calculatedAccumulation；
Comparing the accumulated consumed power WAccumulationAnd judging whether to make the air conditioner according to the comparison result with the preset power consumption WThe device enters the defrosting mode again;
wherein the preset consumed power W is determined by:
setting a defrosting starting judgment condition;
when the judgment condition is met, the air conditioner enters a defrosting mode;
calculating the accumulated power consumption W of the air conditioner between two adjacent defrosting modesn；
Calculating a plurality of accumulated consumptions WnTaking the average value as the preset consumed power W.
2. The defrosting control method of an air conditioner according to claim 1, wherein the cumulative consumed power W is comparedAccumulationAnd judging whether the air conditioner enters the defrosting mode again according to the comparison result with the preset consumed power W, wherein the step of judging whether the air conditioner enters the defrosting mode again comprises the following steps:
if 0.9 W.ltoreq.WAccumulationIf W is less than W, the operation frequency of the compressor is reduced, and the heating operation is continued.
3. The defrosting control method of an air conditioner according to claim 2, wherein if 0.9 W.ltoreq.WAccumulationIf W is less than the preset value, the running frequency of the compressor is reduced by 20 percent.
4. The defrosting control method of an air conditioner according to claim 1, wherein the cumulative consumed power W is comparedAccumulationAnd judging whether the air conditioner enters the defrosting mode again according to the comparison result with the preset consumed power W, wherein the step of judging whether the air conditioner enters the defrosting mode again comprises the following steps:
if W isAccumulationAnd if the pressure is larger than or equal to W, the air conditioner is enabled to enter the defrosting mode again.
5. The defrosting control method of an air conditioner according to claim 1, wherein the step of setting the judgment condition for entering defrosting includes:
the condition for making the air conditioner enter the defrosting mode is set according to the temperature of the coil of the outdoor unit.
6. The defrosting control method of an air conditioner according to claim 1, wherein the plurality of accumulated consumed powers W are calculatednThe average value of "a plurality of accumulated consumed powers W" in the step of setting the average value as the preset consumed power Wn"comprises at least W1、W2、W3。
7. The defrosting control method of an air conditioner according to claim 1, wherein, starting from the first time the air conditioner enters the defrosting mode after the air conditioner is turned on, the defrosting is entered to the next time and then entered into an operation cycle, and the cumulative power consumption W of the air conditioner in each operation cycle is calculatedAccumulationIn the step (1), the first time of entering the defrosting mode after the air conditioner is started is the preset time.
8. The air conditioner defrost control method of claim 7, wherein the preset time is determined according to the steps of:
acquiring the type of an air conditioner and the external environment temperature and humidity value of an application scene of the air conditioner;
and obtaining the time for the air conditioner to enter the defrosting mode for the first time after the air conditioner is started through tests according to the model of the air conditioner and the external environment temperature and humidity value of the application scene.
9. The air conditioner defrost control method of any one of claims 1-8, further comprising:
when the condition of entering a defrosting mode is met, the four-way valve is reversed to defrost;
wherein, the time of each defrosting mode is a preset fixed time.
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| CN201810558876.6A CN108692425B (en) | 2018-06-01 | 2018-06-01 | Defrosting control method for air conditioner |
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| CN201810558876.6A CN108692425B (en) | 2018-06-01 | 2018-06-01 | Defrosting control method for air conditioner |
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| CN111895594A (en) * | 2019-05-06 | 2020-11-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN110736219B (en) * | 2019-09-20 | 2022-04-19 | 青岛海尔空调器有限总公司 | Anti-freezing control method for indoor unit of air conditioner |
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| JPS60138348A (en) * | 1983-12-26 | 1985-07-23 | Matsushita Electric Ind Co Ltd | Method of controlling defrosting of air conditioner |
| US6047554A (en) * | 1998-11-20 | 2000-04-11 | Lg Electronics Inc. | Optimum defrosting cycle control method for inverter refrigerator |
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