CN108800451B - Defrosting control method for air conditioner - Google Patents

Defrosting control method for air conditioner Download PDF

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Publication number
CN108800451B
CN108800451B CN201810559294.XA CN201810559294A CN108800451B CN 108800451 B CN108800451 B CN 108800451B CN 201810559294 A CN201810559294 A CN 201810559294A CN 108800451 B CN108800451 B CN 108800451B
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air conditioner
defrosting
time
defrosting mode
mode
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CN108800451A (en
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许文明
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06Removing frost

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 WAccumulationJudging whether the air conditioner enters the defrosting mode again according to the comparison result with the preset consumed power W; 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. The invention can more accurately judge the time when the air conditioner enters the defrosting mode and furthest reduce the influence on the indoor temperature in the defrosting process.

Description

Defrosting control method for air conditioner
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 WAccumulationJudging whether the air conditioner enters the defrosting mode again according to the comparison result with the preset consumed power W; 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 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 the above-mentioned skyIn a preferred embodiment of the method for controlling defrosting of an air conditioner, the step of comparing the cumulative power consumption W with the preset power consumption W and determining whether to enter the air conditioner into the defrosting mode again according to 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 W as the preset consumed power.
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 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 W of "the plurality of accumulated consumed powers W" in the step of setting W as the preset consumed powern"comprises at least W1、W2、W3
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 air conditioner enters the defrost mode again, the period including the defrost mode and the heating mode, and if the air conditioner performs the defrost mode at an appropriate timing each time, the accumulated power consumption of the air conditioner during one operation period may be considered to be fixed, that is, the accumulated power consumption of the air conditioner during one operation period is the preset power consumption W. Thus, it is possible to provideStarting from the first defrosting mode after the air conditioner is started, the accumulated consumed power W of the air conditioner is calculatedAccumulationComparison WAccumulationAnd the value of W can accurately judge whether to make the air conditioner enter 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 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…WnAverage value W ofThe average value Q is the predetermined power consumption.
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, the judgment condition of defrosting set in the test process can flexibly select any reasonable judgment condition, for example, the condition of enabling the air conditioner to enter a defrosting mode can be set according to the attenuation speed 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 0.9W ≦ WAccumulationWhen the frequency is less than W, the running frequency of the compressor can be reduced, the heating operation is continued, for example, the running frequency of the compressor is reduced by 20%, and 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.
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 the non-stop defrosting mode, i.e. when fullWhen the condition of entering the defrosting mode is sufficient, the bypass pipeline is opened to defrost, namely, the air conditioner heats the indoor space and simultaneously utilizes the bypass pipeline to defrost the outdoor unit. At this time, since a part of the heating capacity of the air conditioner is still present in the defrosting mode, that is, a part of the power is consumed, the cumulative 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 defrosting of the air conditioner in each operation period is calculatedPower consumption WAccumulation
Comparing the accumulated consumed power WAccumulationJudging whether the air conditioner enters the defrosting mode again according to the comparison result with the preset consumed power W;
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;
determining the time for entering a defrosting mode for the first time after the current air conditioner is started according to the time T;
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 accumulated consumed power is comparedWAccumulationAnd 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 5, 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.
7. The defrosting control method of an air conditioner according to claim 5, 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.
8. 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
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.
CN201810559294.XA 2018-06-01 2018-06-01 Defrosting control method for air conditioner Active CN108800451B (en)

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CN111536737B (en) * 2020-04-24 2021-12-14 海信(山东)冰箱有限公司 Refrigerator and control method thereof
CN111536738B (en) * 2020-04-24 2022-03-18 海信(山东)冰箱有限公司 Refrigerator and control method thereof

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CN107917505A (en) * 2017-11-07 2018-04-17 珠海格力电器股份有限公司 A kind of multi-split air conditioner and its outdoor unit defrosting control method

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CN102759237A (en) * 2011-04-25 2012-10-31 珠海格力电器股份有限公司 Heat pump type air conditioner, and defrosting control method and defrosting control device thereof
CN104913452A (en) * 2015-06-03 2015-09-16 广东美的制冷设备有限公司 Air conditioner and defrosting control method for same
CN105318619A (en) * 2015-10-23 2016-02-10 珠海格力电器股份有限公司 Method and device for controlling defrosting of air conditioner
CN106152644A (en) * 2016-06-30 2016-11-23 珠海格力电器股份有限公司 Heat pump air conditioner unit defrosting control method and system
CN106352599A (en) * 2016-09-22 2017-01-25 芜湖美智空调设备有限公司 Defrosting control method, defrosting control device and heat pump type air conditioner
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