CN108800435B - Defrosting control method for air conditioner - Google Patents
Defrosting control method for air conditioner Download PDFInfo
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- CN108800435B CN108800435B CN201810559254.5A CN201810559254A CN108800435B CN 108800435 B CN108800435 B CN 108800435B CN 201810559254 A CN201810559254 A CN 201810559254A CN 108800435 B CN108800435 B CN 108800435B
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- air conditioner
- defrosting
- time
- defrosting mode
- control method
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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
- F24F11/62—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
-
- 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
- F24F11/88—Electrical aspects, e.g. circuits
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 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 Comparing the accumulated heating quantity QAccumulationAnd judging whether the air conditioner enters the defrosting mode again according to the comparison result with the preset heating quantity Q. The invention can more accurately judge the time when the air conditioner enters the defrosting mode by taking the preset heating quantity Q as the reference, and avoids the frequent defrosting phenomenon. And the influence on the indoor temperature in the defrosting process can be reduced to the greatest extent according to the accumulated heating capacity 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 frosting condition is achieved, the outdoor machine can frost, the frosting directly influences the heating quantity, and the heating quantity directly influences the feeling of a user. 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 can not directly reflect the actual heating capacity of the air conditioner, and the heating capacity of the air conditioner used by a user is really influenced.
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 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 stationThe accumulated heating capacity QAccumulationAnd judging whether the air conditioner enters the defrosting mode again according to the comparison result with the preset heating quantity Q.
In a preferred embodiment of the above-described defrosting control method for an air conditioner, "comparing the accumulated heating amount QAccumulationAnd the step of judging whether to enter the defrosting mode according to the comparison result with the preset heating quantity Q comprises the following steps: if Q is 0.9. ltoreq.QAccumulationIf the frequency is less than Q, the operation frequency of the compressor is reduced, and the heating operation is continued.
In the above-described preferred embodiment of the defrosting control method of the air conditioner, if 0.9 Q.ltoreq.QAccumulationIf < Q, the compressor operating frequency is reduced by 20%.
In a preferred embodiment of the above-described defrosting control method for an air conditioner, "comparing the accumulated heating amount QAccumulationAnd the step of judging whether to enter the defrosting mode according to the comparison result with the preset heating quantity Q comprises the following steps: if Q isAccumulationAnd if the temperature is more than or equal to Q, 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 heating amount Q 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 heating quantity Q of the air conditioner between two adjacent defrosting modesn(ii) a Calculating a plurality of accumulated heating quantities QnAnd taking the average value Q of the above as a preset heating quantity.
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 heating amounts Q are calculatednIn the step of "average value Q of a plurality of cumulative heating amounts Qn"comprises at least Q1、Q2、Q3。
In the preferred embodiment of the above-mentioned defrosting control method for an air conditioner, "starting from the first time the air conditioner enters the defrosting mode after being turned on,real-time calculating accumulated heating quantity Q of air conditionerAccumulationIn the step (1), the time for the air conditioner to enter the defrosting mode for the first time after the air conditioner is started is 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 heating quantity Q of the air conditionerAccumulationAnd comparing the calculated heat quantity with a preset heat quantity Q to judge the accumulated heat quantity Q 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 heating quantity Q 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 greatest extent according to the accumulated heating capacity 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 of the air conditioner of the present inventionThe method comprises the following steps: s110, calculating 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 S120, comparing the accumulated heating quantity QAccumulationAnd judging whether the air conditioner enters the defrosting mode again according to the comparison result with the preset heating quantity Q. 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 includes the defrost mode and the heating mode, and if the air conditioner performs the defrost mode at the right time, the accumulated heating amount of the air conditioner during one operation period may be regarded as fixed, that is, the accumulated heating amount of the air conditioner during one operation period is the preset heating amount Q. Therefore, the accumulated heating quantity Q of the air conditioner is calculated from the first time the air conditioner enters the defrosting mode after being startedAccumulationComparison of QAccumulationAnd the value of Q can accurately judge whether the air conditioner enters the defrosting mode again.
As an example, the preset heating amount Q 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 met, the air conditioner enters a defrosting mode, and then the accumulated heating quantity Q of the air conditioner is calculatednWhen the judgment condition is satisfied again, the currently calculated accumulated heating quantity Q is usednIs preserved as Q1(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 currently calculated accumulated heating quantity Q is calculatednIs preserved as Q2(ii) a By analogy, the accumulated heating quantity Q between two adjacent defrosting modes of the air conditioner can be calculated1、Q2、Q3…Qn(ii) a Then calculating the accumulated heating quantity Q1、Q2、Q3…QnThe average value Q is the preset heating capacity.
It will be understood by those skilled in the art that the accumulated heating capacity of the air conditioner may be calculated by way of integration, and a detailed calculation method will not be described herein. The accumulated heating capacity 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 heating capacity Q 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 Q is 0.9 ≦ QAccumulationIf the frequency is less than Q, the operation frequency of the compressor can be reduced, 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 isAccumulationAnd if the accumulated heating capacity of the air conditioner reaches the preset heating capacity Q, the air conditioner can be defrosted, and the air conditioner enters a 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 this defrosting mode, the air conditioner does not perform heating, and therefore, the calculation of the cumulative heating amount Q of the air conditioner can be resumed after the end of the first defrosting modeAccumulation. It will be readily understood by those skilled in the art that in this mode, the mode is due to the accumulation in defrost modeThe heating amount is 0, so the accumulated heating amount Q of the air conditioner is calculated even from the start of entering the defrosting 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, since a part of the heating capacity of the air conditioner still exists in the defrosting mode, the accumulated heating capacity Q 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 heating amount generated by the air conditioner in the defrosting mode is not considered when determining the preset heating amount Q, the calculation of the accumulated heating amount Q of the air conditioner may be resumed after the defrosting mode is ended when the non-stop defrosting mode is adoptedAccumulation。
In summary, the present invention calculates the accumulated heating capacity Q of the air conditionerAccumulationAnd comparing the calculated heat quantity with a preset heat quantity Q to judge the accumulated heat quantity Q 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 heating quantity Q 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 greatest extent according to the accumulated heating capacity 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 carried out to the next time, the defrosting is carried out to form an operation period, and the accumulated heating quantity Q of the air conditioner in each operation period is calculatedAccumulation；
Comparing the accumulated heating quantity QAccumulationJudging whether the air conditioner enters the defrosting mode again according to the comparison result with the preset heating quantity Q;
wherein the preset heating amount Q 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 heating quantity Q of the air conditioner between two adjacent defrosting modesn；
Calculating a plurality of accumulated heating quantities QnAnd taking the average value as a preset heating quantity Q.
2. The defrosting control method of an air conditioner according to claim 1, wherein the accumulated heating amount Q is comparedAccumulationAnd the step of judging whether to enter the defrosting mode according to the comparison result with the preset heating quantity Q comprises the following steps:
if Q is 0.9. ltoreq.QAccumulationIf the frequency is less than Q, 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 Q.ltoreq.QAccumulationIf < Q, the compressor operating frequency is reduced by 20%.
4. The defrosting control method of an air conditioner according to claim 1, wherein the accumulated heating amount Q is comparedAccumulationAnd the step of judging whether to enter the defrosting mode according to the comparison result with the preset heating quantity Q comprises the following steps:
if Q isAccumulationAnd if the temperature is more than or equal to Q, 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 a plurality of accumulated heating amounts Q are calculatednIn the step of "average value of a plurality of cumulative heating amounts Qn"comprises at least Q1、Q2、Q3。
7. The defrosting control method of an air conditioner according to claim 1, wherein the cumulative heating capacity Q of the air conditioner for each operation period is calculated from the time the air conditioner starts a defrosting mode for the first time, the defrosting mode is started from the time the air conditioner starts a defrosting mode, and the defrosting mode is started from the time the air conditioner starts a defrosting mode to the time the air conditioner starts a next timeAccumulationIn the step (1), the time for the air conditioner to enter the defrosting mode for the first time after the air conditioner is started is 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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| CN201810559254.5A CN108800435B (en) | 2018-06-01 | 2018-06-01 | Defrosting control method for air conditioner |
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| CN110513817B (en) * | 2019-08-26 | 2021-05-18 | Tcl空调器(中山)有限公司 | Air conditioner heating control method and air conditioner |
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| US20150241111A1 (en) * | 2014-02-24 | 2015-08-27 | Trane International Inc. | Electric Heat Defrost Alogrithm |
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