CN111412581A - Defrosting control method for air conditioner - Google Patents
Defrosting control method for air conditioner Download PDFInfo
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- CN111412581A CN111412581A CN201910013065.2A CN201910013065A CN111412581A CN 111412581 A CN111412581 A CN 111412581A CN 201910013065 A CN201910013065 A CN 201910013065A CN 111412581 A CN111412581 A CN 111412581A
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- air conditioner
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- temperature
- 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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—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
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 more accurately judge the defrosting time of the air conditioner, the defrosting control method comprises the following steps: selectively detecting the real-time temperature T of the outer coil or the inner coil according to the operation state of the air conditioner after the air conditioner continuously operates for a first preset time1(ii) a At the detection of the real-time temperature T1Selectively acquiring the maximum temperature T of the outer coil pipe or the inner coil pipe according to the running state of the air conditioner within the second preset time0(ii) a Comparison of the maximum temperatures T0And real time temperature T1(ii) a Judging whether the air conditioner enters a defrosting mode or not according to the comparison result; wherein the second preset time is less than the first preset timeAnd (3) removing the solvent. The defrosting control method of the air conditioner can make the defrosting judgment of the air conditioner more accurate and the judgment precision higher.
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 ambient temperature is lowered or raised by the refrigerant switching between the circulation lines through the high pressure/low pressure/gas/liquid state.
Under the condition of low-temperature heating in winter or low-temperature cooling air in summer, a heat exchanger of the air conditioner exchanges heat with air along with the operation of the air conditioner, when the temperature of a coil and fins reaches the dew point temperature of the air through a low-temperature refrigerant, dew can be formed on the coil and the fins, and when the temperature of the coil and the fins is lower, frost can be formed. Along with the time, frost is thicker and thicker, and even the fins are blocked, so that the air volume of air driven by the air side fan and passing through the coil pipes and the fins is reduced, the air can not exchange heat with the fins and the coil pipes better, the heat exchange effect of the heat exchanger is influenced, the temperature of a cooling medium in the coil pipes of the heat exchanger is reduced, the frost is thicker and the temperature of the cooling medium in the coil pipes is reduced faster, the energy consumption of a system is increased, and the produced cold/heat is reduced. Therefore, the determination of the timing and conditions of defrosting has a significant influence on defrosting.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to more accurately judge the time when the air conditioner enters the defrosting mode, the invention provides a defrosting control method for an air conditioner, which comprises the following steps: selectively detecting the real-time temperature T of the outer coil or the inner coil according to the running state of the air conditioner after the air conditioner continuously runs for a first preset time1(ii) a At the detection of the real-time temperature T1Selectively acquiring the external coil or the place according to the running state of the air conditioner within a second preset timeMaximum temperature T of the inner coil0(ii) a Comparison of the maximum temperatures T0And real time temperature T1(ii) a Judging whether the air conditioner enters a defrosting mode or not according to the comparison result; and the second preset time is less than the first preset time.
In a preferred embodiment of the above-described defrosting control method of an air conditioner, "the highest temperature T is compared0And real time temperature T1"comprises the following steps: calculating T0And T1△ T, △ T ═ T0－T1。
In the preferred embodiment of the defrosting control method for the air conditioner, the step of determining whether to enable the air conditioner to enter the defrosting mode according to the comparison result comprises the steps of calculating △ T within a continuous time T from the time when △ T is greater than or equal to the set value, and enabling the air conditioner to enter the defrosting mode if △ T is greater than or equal to the set value all the time.
In a preferred embodiment of the above defrosting control method of an air conditioner, the set value is an arbitrary value between 1 and 3; and/or the time t is any time between 25 and 35 seconds.
In a preferred embodiment of the above-described air conditioner defrost control method, the set value is 2, and/or the time t is 30 seconds.
In a preferred embodiment of the above-mentioned defrosting control method for an air conditioner, "after the air conditioner is continuously operated for a first preset time, the real-time temperature T of the outer coil or the inner coil is selectively detected according to the operation state of the air conditioner1"comprises the following steps: if the air conditioner is in a heating operation state, detecting the real-time temperature T of the outer coil pipe1If the air conditioner is in a refrigerating operation state, detecting the real-time temperature T of the inner coil pipe1(ii) a "in-detection real-time temperature T1Selectively acquiring the maximum temperature T of the outer coil pipe or the inner coil pipe within the second preset time according to the running state of the air conditioner0"comprises the following steps: if the air conditioner is in a heating operation state, the highest temperature T of the external coil pipe is obtained0If the air conditioner is in a cooling operation stateObtaining the highest temperature T of the inner coil0。
In a preferred embodiment of the above defrosting control method of an air conditioner, the first preset time is any time between 9 and 11 minutes.
In a preferred embodiment of the above-described defrosting control method of an air conditioner, the first preset time is 10 minutes.
In a preferred embodiment of the above defrosting control method of an air conditioner, the second preset time is any time between 2 and 4 minutes.
In a preferred embodiment of the above-described defrosting control method of an air conditioner, the second preset time is 3 minutes.
In the defrosting control method of the air conditioner, firstly, before the real-time temperature of the external coil is detected, the air conditioner continuously operates for a first preset time, because the external coil gradually generates a frost layer along with the heating operation time of the air conditioner, and under the condition that the time for the air conditioner to start heating operation or change from defrosting to heating operation or continuously operate and heat is shorter, the frost layer is basically not formed or is rarely formed, and the temperature of the external coil is firstly reduced and then increased, the temperature of the external coil does not need to be detected in real time initially, but the temperature of the external coil is detected in real time after the first preset time for the continuous operation of the air conditioner is detected, so that unnecessary energy consumption of the air conditioner can be avoided. Second, the comparative real-time temperature T of the present invention1And maximum temperature T0The maximum temperature T0Is detecting the real-time temperature T of the outer coil1The maximum temperature T is used as the temperature obtained in the first few minutes0With the real-time temperature T of the external coil detected thereafter1Finally, the invention further judges the frosting condition of the air conditioner by judging the attenuation condition of the external coil in the continuous time T, for example, △ T is always less than 2 in continuous 30 seconds, thereby more accurately judging the defrosting time.
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 described clearly and completely with reference to the accompanying drawings, and it is apparent that the described 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.
The invention aims to make the air conditioner enter a defrosting mode at a proper defrosting time. Referring to fig. 1, fig. 1 is a main flowchart of a defrosting control method of an air conditioner according to the present invention. As shown in fig. 1, the defrosting control method of an air conditioner of the present invention includes: s110, after the air conditioner continuously operates for a first preset time, selectively detecting the real-time temperature T of the outer coil pipe or the inner coil pipe according to the operation state of the air conditioner1(ii) a S120, detecting the real-time temperature T1Selectively acquiring the maximum temperature T of the outer coil pipe or the inner coil pipe according to the running state of the air conditioner within the second preset time0(ii) a S130, comparing the highest temperature T0And real time temperature T1(ii) a And S140, judging whether the air conditioner enters a defrosting mode or not according to the comparison result. And the second preset time is less than the first preset time.
It should be noted that, the defrosting control method of the present invention may execute step S110 first and then step S120, or may execute step S120 first and then step S110, which do not affect the specific implementation of the present invention. In addition, as will be readily understood by those skilled in the art, generally, the outer coil tends to frost during heating in winter, and the inner coil tends to frost during low temperature cold air production in summer (e.g., cold air production into a freezer). Therefore, if the air conditioner is in the heating operation state, the real-time temperature T of the external coil is detected in step S1101If the air conditioner is in a refrigerating operation state, detecting the real-time temperature T of the inner coil pipe1(ii) a Also, in step S120, if the air conditioner is operatedWhen the device is in a heating operation state, the highest temperature T of the outer coil pipe is obtained0If the air conditioner is in a refrigerating operation state, the highest temperature T of the inner coil pipe is obtained0。
The following description will be given taking an example in which the air conditioner is in a heating operation state.
In step S110, after the air conditioner is continuously operated for a first preset time, the real-time temperature T of the outdoor coil is detected1. As an example, the first preset time may be 10 minutes, or any other time between 9-11 minutes. The skilled person can set other reasonable time according to the practical configuration of the outdoor heat exchanger of the air conditioner, experimental data and frosting degree.
In step S120, the real-time temperature T of the outdoor coil is detected1Detecting the maximum temperature T of the outdoor coil pipe in the second preset time0. As an example, the second preset time may be 3 minutes or any other time between 2-4 minutes. Other reasonable times can be set by those skilled in the art according to the actual configuration of the outdoor heat exchanger of the air conditioner and experimental data. For example, if the real-time temperature T of the external coil begins to be detected after the air conditioner is continuously operated for 10 minutes1Then, the maximum temperature T of the outside coil for 3 minutes from the 7 th minute to the 10 th minute is calculated, starting when the air conditioner is continuously operated to the 7 th minute0。
In step S130, the highest temperature T is compared0And real time temperature T1Then, the maximum temperature T is calculated0And real time temperature T1△ T, △ T ═ T0－T1Specifically, △ T is the real-time temperature T of the outer coil1Relative to the maximum temperature T0The attenuation condition, the field of technicians understand easily that, along with frosting on the outer coil pipe is more and more, the heat transfer ability between external environment air and the outer coil pipe can obviously reduce, along with the heat transfer ability between outer coil pipe and the external environment reduces, the temperature of outer coil pipe can attenuate, consequently can accurately judge the frosting level of outer coil pipe through the attenuation condition that detects the outer coil pipe temperature to select defrosting opportunity more accurately.
In step S140, when determining whether to make the air conditioner enter the defrosting mode according to the comparison result, first determining △ T whether the set value is greater than or equal to the set value, as an example, the set value can be 2 or any other value between 1 and 3, and a person skilled in the art can also set other reasonable values according to the actual configuration, experimental data and frosting degree of the outdoor heat exchanger.
In summary, the present invention determines whether to enable the air conditioner to enter the defrosting mode by determining the attenuation condition of the external coil in the continuous time t. In the defrosting control method of the air conditioner, firstly, before the real-time temperature of the external coil is detected, the air conditioner continuously operates for a first preset time, because the external coil gradually generates a frost layer along with the heating operation time of the air conditioner, and under the condition that the time for the air conditioner to start heating operation or change from defrosting to heating operation or continuously operate and heat is shorter, the frost layer is basically not formed or is rarely formed, and the temperature of the external coil is firstly reduced and then increased, the temperature of the external coil does not need to be detected in real time initially, but the temperature of the external coil is detected in real time after the first preset time for the continuous operation of the air conditioner is detected, so that unnecessary energy consumption of the air conditioner can be avoided. Second, the comparative real-time temperature T of the present invention1And maximum temperature T0The maximum temperature T0Is detecting the real-time temperature T of the outer coil1The maximum temperature T is used as the temperature obtained in the first few minutes0With the real-time temperature T of the external coil detected thereafter1By comparison, the obtained △ T can reflect the temperature of the external coil more accuratelyFinally, the invention further judges the frosting condition of the air conditioner by judging the attenuation condition of the external coil in the continuous time T, for example △ T is always less than 2 in continuous 30 seconds, thereby more accurately judging the defrosting time.
The above embodiment is described by taking an example of heating operation of the air conditioner, and for the case of cooling operation of the air conditioner, it is only necessary to change the real-time temperature and the maximum temperature of the external coil detected in the above embodiment into the real-time temperature and the maximum temperature of the internal coil, and the purpose of accurately judging the defrosting time of the air conditioner can be achieved.
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:
selectively detecting the real-time temperature T of the outer coil or the inner coil according to the running state of the air conditioner after the air conditioner continuously runs for a first preset time1；
At the detection of the real-time temperature T1Selectively acquiring the maximum temperature T of the outer coil pipe or the inner coil pipe within the second preset time according to the running state of the air conditioner0；
Comparison of the maximum temperatures T0And real time temperature T1；
Judging whether the air conditioner enters a defrosting mode or not according to the comparison result;
and the second preset time is less than the first preset time.
2. The defrosting control method of an air conditioner according to claim 1, wherein the highest temperature T is compared0And real time temperature T1"comprises the following steps:
calculating T0And T1△ T, △ T ═ T0－T1。
3. The air conditioner defrost control method according to claim 2, wherein the step of determining whether to enter the air conditioner into the defrost mode according to the comparison result comprises:
calculating △ T within the subsequent continuous time T from the moment that △ T is larger than or equal to the set value;
and if △ T is always greater than or equal to the set value, enabling the air conditioner to enter a defrosting mode.
4. The air conditioner defrost control method of claim 3, wherein the set value is any value between 1-3;
and/or the time t is any time between 25 and 35 seconds.
5. The air conditioner defrost control method of claim 4, wherein the set value is 2 and/or the time t is 30 seconds.
6. The defrosting control method of an air conditioner according to claim 1, wherein the real-time temperature T of the outer coil or the inner coil is selectively detected according to the operation state of the air conditioner after the air conditioner is continuously operated for a first preset time1"comprises the following steps:
if the air conditioner is in a heating operation state, detecting the real-time temperature T of the outer coil pipe1If the air conditioner is in a refrigerating operation state, detecting the real-time temperature T of the inner coil pipe1；
"in-detection real-time temperature T1Within the second preset time before the first preset time,selectively obtaining the maximum temperature T of the outer coil pipe or the inner coil pipe according to the running state of the air conditioner0"comprises the following steps:
if the air conditioner is in a heating operation state, the highest temperature T of the external coil pipe is obtained0If the air conditioner is in a refrigerating operation state, the highest temperature T of the inner coil pipe is obtained0。
7. The air conditioner defrost control method of any one of claims 1-6, wherein the first preset time is any time between 9-11 minutes.
8. The air conditioner defrost control method of claim 7, wherein the first preset time is 10 minutes.
9. The air conditioner defrost control method of any one of claims 1-6, wherein the second preset time is any time between 2-4 minutes.
10. The air conditioner defrost control method of claim 9, wherein the second preset time is 3 minutes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910013065.2A CN111412581B (en) | 2019-01-07 | 2019-01-07 | Defrosting control method for air conditioner |
| PCT/CN2019/084350 WO2020143133A1 (en) | 2019-01-07 | 2019-04-25 | Defrosting control method for air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910013065.2A CN111412581B (en) | 2019-01-07 | 2019-01-07 | Defrosting control method for air conditioner |
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| CN111412581A true CN111412581A (en) | 2020-07-14 |
| CN111412581B CN111412581B (en) | 2023-04-18 |
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| WO (1) | WO2020143133A1 (en) |
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| CN113840512B (en) * | 2021-08-06 | 2023-10-20 | 锐捷网络股份有限公司 | Temperature adjusting method and device, electronic equipment and storage medium |
| CN114543263A (en) * | 2022-01-29 | 2022-05-27 | 北京小米移动软件有限公司 | Coil temperature control method, coil temperature control device and storage medium |
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| Publication number | Publication date |
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| CN111412581B (en) | 2023-04-18 |
| WO2020143133A1 (en) | 2020-07-16 |
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