CN108692426B - Defrosting control method for air conditioner - Google Patents
Defrosting control method for air conditioner Download PDFInfo
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- CN108692426B CN108692426B CN201810559293.5A CN201810559293A CN108692426B CN 108692426 B CN108692426 B CN 108692426B CN 201810559293 A CN201810559293 A CN 201810559293A CN 108692426 B CN108692426 B CN 108692426B
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- 238000010257 thawing Methods 0.000 title claims abstract description 123
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000009825 accumulation Methods 0.000 claims abstract description 76
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 238000004364 calculation method Methods 0.000 description 5
- 230000001186 cumulative effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
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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
- F24F11/30—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
-
- 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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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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- 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)
- Thermal Sciences (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 startingAccumulationAnd the accumulated heating quantity QAccumulation(ii) a Comparison QAccumulation/WAccumulationJudging whether the air conditioner enters the defrosting mode again according to the comparison result and the preset energy efficiency ratio C; the time for the air conditioner to enter the defrosting mode for the first time after the air conditioner is started is determined according to the following mode: acquiring the time T for the air conditioner with the same type as the air conditioner to enter a defrosting mode for the first time after the air conditioner is started in the same environment and the same operating condition; and determining the time for entering the defrosting mode for the first time after the current air conditioner is started according to the T. The invention can accurately judge the time when the air conditioner enters the defrosting mode and can reduce the influence on the indoor temperature in the defrosting process to the maximum extent.
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 machine can frost, the heating capacity of the air conditioner is directly affected by frosting, along with the increase of the frosting degree, the heating capacity is continuously attenuated, and the room temperature fluctuates. When the attenuation is to a certain extent, the defrosting operation must be performed. 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 actual heating capacity of the air conditioner, and the heating capacity of the air conditioner 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 and the accumulated heating quantity Q of the air conditioner in real time from the first time of entering the defrosting mode after the air conditioner is startedAccumulation(ii) a Comparison QAccumulation/WAccumulationJudging whether the air conditioner enters the defrosting mode again according to the comparison result and the preset energy efficiency ratio C; the time for the air conditioner to enter the defrosting mode for the first time after the air conditioner is started is determined according to the following mode: acquiring the time T for the air conditioner with the same type and the same type as the air conditioner to enter a defrosting mode for the first time after the air conditioner is started in the same environment and the same operating condition; and determining the time for entering the defrosting mode for the first time after the current air conditioner is started according to the time T.
In a preferred embodiment of the above-described defrosting control method of an air conditioner, "comparison QAccumulation/WAccumulationIs compared with a preset energy efficiency ratio C, and is judged to beThe step of 'no to make the air conditioner enter the defrosting mode again' includes: if 0.9 C.ltoreq.QAccumulation/WAccumulationIf the frequency is less than C, the operation frequency of the compressor is reduced, and the heating operation is continued.
In the preferred embodiment of the defrosting control method for an air conditioner, if 0.9 C.ltoreq.QAccumulation/WAccumulationIf < C, the running frequency of the compressor is reduced by 20%.
In a preferred embodiment of the above-described defrosting control method of an air conditioner, "comparison QAccumulation/WAccumulationAnd judging whether to enable the air conditioner to enter the defrosting mode again according to the comparison result, wherein the step of comparing the value with the preset energy efficiency ratio C comprises the following steps: if Q isAccumulation/WAccumulationAnd if the temperature is more than or equal to C, the air conditioner is enabled to enter the defrosting mode again.
In a preferred embodiment of the above-described air conditioner defrost control method, the preset energy efficiency ratio C 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 consumed power W and the accumulated heating quantity Q of the air conditioner between two adjacent defrosting modesAccumulation(ii) a Calculating a plurality of QAccumulation/WAccumulationAnd taking the average value C as a preset energy efficiency ratio.
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 a preferred embodiment of the above-described air conditioner defrosting control method, the step of "setting a condition for bringing the air conditioner into the defrosting mode according to the temperature of the outdoor unit coil" includes: the condition for making the air conditioner enter the defrosting mode is set according to the decay speed of the temperature of the coil of the outdoor unit.
In a preferred embodiment of the above-described air conditioner defrosting control method, the step of "setting a condition for bringing the air conditioner into the defrosting mode according to the temperature of the outdoor unit coil" includes: the condition for making the air conditioner enter the defrosting mode is set according to the difference between the temperature of the coil of the outdoor unit and the preset temperature.
In a preferred embodiment of the above-described air conditioner defrost control method, in "calculating a plurality of qsAccumulation/WAccumulationThe average value C of (a), and the "plurality of Q s" in the step of setting C as a preset energy efficiency ratioAccumulation/WAccumulation"at least three sets of ratios are included.
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 startedAccumulationAnd the accumulated heating quantity QAccumulationIn 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 the accumulated heating quantity QAccumulationAnd compare QAccumulation/WAccumulationAnd the preset energy efficiency ratio C, so as to judge whether the air conditioner reaches the degree of defrosting again. The preset energy efficiency ratio C is used as a reference, so that the time when the air conditioner enters the defrosting mode can be accurately judged, and the frequent defrosting phenomenon is avoided. And according to QAccumulation/WAccumulationThe value of (2) can reduce the influence on the indoor temperature in the defrosting process to the maximum extent, 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 startedAccumulationAnd the accumulated heating quantity QAccumulation(ii) a S120, comparing QAccumulation/WAccumulationAnd judging whether the air conditioner enters the defrosting mode again according to the comparison result. As can be understood by those skilled in the art, the air conditioner performs defrosting from the time of entering the defrosting mode to the time of entering the defrosting mode again into one operation cycle including the defrosting operation and the heating operation, and if the air conditioner performs defrosting at the right time, Q is set to be one operation cycle of the air conditionerAccumulation/WAccumulationThe value of (A) can be considered fixed, i.e. Q of the air conditioner during one operating cycleAccumulation/WAccumulationThe ratio of (a) is a preset energy efficiency ratio C. 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 startedAccumulationAnd the accumulated heating quantity QAccumulationComparison of QAccumulation/WAccumulationThe value of the energy efficiency ratio C and the preset energy efficiency ratio C can accurately judge whether the air conditioner enters the defrosting mode again.
In step S110, the time for the air conditioner to enter the defrosting mode for the first time after the air conditioner is turned on is determined as follows: acquiring the time T for the air conditioner with the same type as the air conditioner to enter a defrosting mode for the first time after the air conditioner is started in the same environment and the same operating condition; and determining the time for entering the defrosting mode for the first time after the current air conditioner is started according to the time T. That is to say, by using the big data principle, the time for the air conditioner with the same type number as the current air conditioner to enter the defrosting mode for the first time after being started under the same environment and the same operation condition is acquired by the background, and then the time for the current air conditioner to enter the defrosting mode for the first time after being started is obtained by calculating a large amount of acquired data. Regarding the use of big data to determine the time for entering the defrosting mode for the first time after the air conditioner is turned on, any suitable calculation method may be adopted by those skilled in the art, and the detailed description of the calculation method is omitted here.
As an example, the preset energy efficiency ratio C 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 calculatednAnd the accumulated heating quantity QnAnd calculate Qn/WnValue C ofn(ii) a When the judgment condition is satisfied again, the currently calculated C is calculatednIs preserved as C1(ii) a Then, the accumulated heating quantity Q of the air conditioner is recalculated from the time when the air conditioner enters the defrosting modenWhen the judgment condition is satisfied again, the current calculation accumulated power consumption W is calculatednAnd the accumulated heating quantity Qn(ii) a By analogy, the Q between two adjacent defrosting modes of the air conditioner can be calculatedn/WnValue C of1、C2、C3…Cn(ii) a Then calculate C1、C2、C3…CnThe average value C is the preset energy efficiency ratio.
It will be understood by those skilled in the art that the accumulated consumed power and the accumulated heating capacity of the air conditioner may be calculated by way of integration, and a detailed calculation manner will not be described herein. The accumulated power consumption and the accumulated heating capacity of the multiple groups of air conditioners in each operation period (the operation period is from the time when the air conditioners enter the defrosting mode to the time when the air conditioners enter the defrosting mode again) are obtained through experiments, and Q obtained through the experimentsn/WnThe more values of (C) the more accurate the preset energy efficiency ratio C. In addition, the judgment condition of defrosting set in the test process can flexibly select any reasonable judgmentAn off condition, for example, a condition for causing the air conditioner to enter a defrosting mode may be set according to the rate of decay of the temperature of the coil of the outdoor unit; or the condition for causing the air conditioner to enter the defrosting mode is set according to the difference between the temperature of the coil of the outdoor unit and the preset temperature, without departing from the scope of the present invention.
In step S120, when 0.9C ≦ QAccumulation/WAccumulationIf the frequency is less than C, the operation frequency of the compressor can be reduced at this moment, the heating operation is continued, for example, the operation frequency of the compressor is reduced by 20%, and the defrosting time can be delayed. When Q isAccumulation/WAccumulationAnd when the temperature is more than or equal to C, the air conditioner enters the defrosting mode again.
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 this defrosting mode, the air conditioner does not perform heating, and therefore, the calculation of the cumulative heating amount and the cumulative power consumption of the air conditioner can be resumed after the end of the first defrosting mode.
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, since a part of the heating amount is still present in the air conditioner in the defrosting mode and the heating power is consumed, the accumulated heating amount and the accumulated consumed power of the air conditioner can be calculated at the start of the first defrosting mode.
In summary, the present invention calculates the cumulative power consumption W of the air conditionerAccumulationAnd the accumulated heating quantity QAccumulationAnd compare QAccumulation/WAccumulationAnd the preset energy efficiency ratio C, so as to judge whether the air conditioner reaches the degree of defrosting again. The preset energy efficiency ratio C is used as a reference, so that the time when the air conditioner enters the defrosting mode can be accurately judged, and the frequent defrosting phenomenon is avoided. And according to QAccumulation/WAccumulationCan be maximized in the range ofThe influence on the indoor temperature in the defrosting process is reduced, and 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 (10)
1. A defrosting control method of an air conditioner is characterized by comprising 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 startingAccumulationAnd the accumulated heating quantity QAccumulation；
Comparison QAccumulation/WAccumulationJudging whether the air conditioner enters the defrosting mode again according to the comparison result and the preset energy efficiency ratio C;
the time for the air conditioner to enter the defrosting mode for the first time after the air conditioner is started is determined according to the following mode:
acquiring the time T for the air conditioner with the same type and the same type as the air conditioner to enter a defrosting mode for the first time after the air conditioner is started in the same environment and the same operating condition;
and determining the time for entering the defrosting mode for the first time after the current air conditioner is started according to the time T.
2. The defrosting control method of an air conditioner according to claim 1, wherein the comparison Q isAccumulation/WAccumulationAnd judging whether to enable the air conditioner to enter the defrosting mode again according to the comparison result, wherein the step of comparing the value with the preset energy efficiency ratio C comprises the following steps:
if 0.9 C.ltoreq.QAccumulation/WAccumulationIf the frequency is less than C, 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 C.ltoreq.QAccumulation/WAccumulationIf < C, the running frequency of the compressor is reduced by 20%.
4. The defrosting control method of an air conditioner according to claim 1, wherein the comparison Q isAccumulation/WAccumulationAnd judging whether to enable the air conditioner to enter the defrosting mode again according to the comparison result, wherein the step of comparing the value with the preset energy efficiency ratio C comprises the following steps:
if Q isAccumulation/WAccumulationAnd if the temperature is more than or equal to C, the air conditioner is enabled to enter the defrosting mode again.
5. The air conditioner defrost control method of claim 1, wherein the preset energy efficiency ratio C 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 modesAccumulationAnd the accumulated heating quantity QAccumulation；
Calculating a plurality of QAccumulation/WAccumulationAnd taking the average value C as a preset energy efficiency ratio.
6. The defrosting control method of an air conditioner according to claim 5, 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.
7. The defrosting control method of an air conditioner according to claim 6, wherein the step of setting the condition for the air conditioner to enter the defrosting mode according to the temperature of the outdoor unit coil includes:
the condition for making the air conditioner enter the defrosting mode is set according to the decay speed of the temperature of the coil of the outdoor unit.
8. The defrosting control method of an air conditioner according to claim 6, wherein the step of setting the condition for the air conditioner to enter the defrosting mode according to the temperature of the outdoor unit coil includes:
the condition for making the air conditioner enter the defrosting mode is set according to the difference between the temperature of the coil of the outdoor unit and the preset temperature.
9. The defrosting control method of an air conditioner according to claim 5, wherein the plurality of Qs is calculatedAccumulation/WAccumulationThe average value C of (a), and the "plurality of Q s" in the step of setting C as a preset energy efficiency ratioAccumulation/WAccumulation"at least three sets of ratios are included.
10. The air conditioner defrost control method of any one of claims 1-9, 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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| CN110243061B (en) * | 2019-06-20 | 2021-09-24 | 广东美的暖通设备有限公司 | Control method, air conditioner, and computer-readable storage medium |
| CN112944593B (en) * | 2021-02-19 | 2023-03-28 | 青岛海尔空调电子有限公司 | Air conditioner and defrosting control method thereof |
| CN113137708A (en) * | 2021-03-09 | 2021-07-20 | 青岛海尔空调电子有限公司 | Defrosting control method of air conditioning system, storage medium and air conditioning system |
| CN114237321B (en) * | 2021-12-16 | 2022-08-26 | 中国联合网络通信集团有限公司 | Vulcanizing machine control method and device, electronic equipment and computer readable medium |
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| CN102138048A (en) * | 2008-09-01 | 2011-07-27 | 三菱电机株式会社 | Heat pump device |
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| CN102138048A (en) * | 2008-09-01 | 2011-07-27 | 三菱电机株式会社 | Heat pump device |
| CN103051649A (en) * | 2011-10-17 | 2013-04-17 | 江苏怡丰通信设备有限公司 | Comprehensive energy consumption monitoring and managing system |
| JP2012042207A (en) * | 2011-10-27 | 2012-03-01 | Mitsubishi Electric Corp | Refrigerating cycle device |
| CN102818337A (en) * | 2012-07-13 | 2012-12-12 | 华中科技大学 | Device for monitoring ground source heat pump system based on internet of things |
| CN107300240A (en) * | 2017-05-17 | 2017-10-27 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
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