CN108019895B - Control method of air conditioner - Google Patents
Control method of air conditioner Download PDFInfo
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- CN108019895B CN108019895B CN201711201509.2A CN201711201509A CN108019895B CN 108019895 B CN108019895 B CN 108019895B CN 201711201509 A CN201711201509 A CN 201711201509A CN 108019895 B CN108019895 B CN 108019895B
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- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner. The invention aims to solve the problem that the coil pipe of the indoor unit is easy to freeze or frost due to the fact that the existing air conditioner operates in a refrigeration mode when the outdoor environment temperature is low. To this end, the control method of the air conditioner includes the steps of: acquiring an operation mode of an air conditioner; when the operation mode is a refrigeration mode, acquiring the operation frequency and the outdoor environment temperature of an air conditioner compressor; and judging whether the air conditioner enters a low-temperature refrigeration mode or not based on the operation frequency and the outdoor environment temperature. By judging whether the air conditioner enters the low-temperature refrigeration mode or not based on the running frequency and the ambient temperature of the compressor during the refrigeration mode, the invention can improve the judgment precision of whether the air conditioner enters the low-temperature refrigeration mode or not, and effectively reduces or avoids the phenomenon of icing/frosting of an indoor unit of the air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner.
Background
With the continuous progress of science and technology, the application field of the air conditioner is wider and wider. Different from the application mode that the air conditioner is used for refrigerating in summer and heating in winter in the traditional cognition, in some special application scenes, the air conditioner can also need to refrigerate and run in winter or at low temperature. Taking a machine room air conditioner as an example, because the performance of equipment can be affected by a large amount of heat generated by electronic equipment in the machine room, and a constant-temperature and constant-humidity indoor environment needs to be kept in the machine room all the year around, the machine room air conditioner usually keeps a refrigeration mode to operate all the year around.
However, when the outdoor environment temperature is low, for example, when the outdoor environment temperature is lower than the temperature of the machine room, the cooling mode is operated, the temperature of the refrigerant entering the evaporator coil of the indoor machine is low due to the low temperature of the refrigerant at the air suction port of the air conditioner compressor, and at the moment, when the evaporator performs heat exchange, the phenomenon of icing or frosting occurs due to the fact that the water vapor in the air reaches the frosting condition, the cooling effect of the air conditioner is affected, and even system faults are easy to occur. Therefore, it is important to determine whether or not the air conditioner is frosted or is about to be frosted, and to perform low-temperature cooling control on the air conditioner when frosting is or is about to be frosted.
Accordingly, there is a need in the art for a new control method of an air conditioner to solve the above-mentioned problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem that the coil pipe of the indoor unit is easy to freeze or frost due to the operation of the existing air conditioner in the cooling mode when the outdoor environment temperature is low, the present invention provides a control method of an air conditioner, which comprises the following steps:
acquiring an operation mode of an air conditioner;
when the operation mode is a refrigeration mode, acquiring the operation frequency and the outdoor environment temperature of the air-conditioning compressor;
and judging whether the air conditioner enters a low-temperature refrigeration mode or not based on the running frequency and the outdoor environment temperature.
In a preferred embodiment of the above method for controlling an air conditioner, the step of "determining whether to cause the air conditioner to enter a low-temperature cooling mode based on the operating frequency and the outdoor ambient temperature" further includes:
when the running frequency is not greater than a frequency threshold and the outdoor environment temperature is not greater than a first temperature threshold within a first set time, enabling the air conditioner to enter the low-temperature refrigeration mode; or
When the operating frequency is greater than the frequency threshold and the outdoor environment temperature is not greater than a second temperature threshold within a second set time, enabling the air conditioner to enter the low-temperature refrigeration mode;
wherein the second temperature threshold is less than the first temperature threshold.
In a preferred embodiment of the control method of the air conditioner, the frequency threshold is zero.
In a preferred embodiment of the method for controlling an air conditioner, after the step of "causing the air conditioner to enter the low-temperature cooling mode", the method for controlling an air conditioner further includes:
acquiring the rotating speed of the inner fan;
and when the rotating speed of the inner fan is less than the target rotating speed, the inner fan is enabled to operate at the target rotating speed.
In a preferred embodiment of the method for controlling an air conditioner, after the step of "causing the air conditioner to enter the low-temperature cooling mode", the method for controlling an air conditioner further includes:
acquiring the actual temperature of the coil pipe of the indoor unit;
acquiring a target temperature of the indoor unit coil;
and adjusting the operating frequency of the air-conditioning compressor based on the target temperature and the actual temperature.
In a preferred embodiment of the control method of the air conditioner, the target temperature is determined based on an outdoor ambient temperature.
In a preferred embodiment of the above method for controlling an air conditioner, the step of "adjusting the operating frequency of the air conditioner compressor based on the target temperature and the actual temperature" further includes:
when the actual temperature is higher than the target temperature, raising the frequency of the compressor; or
And when the actual temperature is lower than the target temperature, the compressor is subjected to frequency reduction.
In a preferred embodiment of the control method of the air conditioner, a frequency value of the frequency increase or decrease of the compressor is determined based on a difference between the target temperature and the actual temperature.
In a preferred embodiment of the above method for controlling an air conditioner, after the step of "when the operating frequency is not greater than a frequency threshold and the outdoor environment temperature is not greater than a first temperature threshold within a first set time, causing the air conditioner to enter the low-temperature cooling mode", the method further includes:
acquiring the outdoor environment temperature;
and when the outdoor environment temperature is greater than a third temperature threshold value, enabling the air conditioner to exit the low-temperature refrigeration mode.
In a preferred embodiment of the above method for controlling an air conditioner, after the step of "when the operating frequency is greater than the frequency threshold and the outdoor environment temperature is not greater than a second temperature threshold within a second set time, causing the air conditioner to enter the low-temperature cooling mode", the method further includes:
acquiring the outdoor environment temperature;
and when the outdoor environment temperature is greater than a fourth temperature threshold value, enabling the air conditioner to exit the low-temperature refrigeration mode.
It can be understood by those skilled in the art that, in the preferred embodiment of the present invention, when the air conditioner is in the cooling mode, the operating state of the air conditioner is further divided into two cases, i.e., the case when the compressor is started and the case when the compressor is operated, by determining whether the operating frequency of the compressor is greater than a frequency threshold (preferably zero), and whether the air conditioner is to enter the cooling mode is further determined based on the comparison between the outdoor ambient temperature and the first temperature threshold and the second temperature threshold, respectively. When the compressor is started, because the temperature of the refrigerant in the compressor and the pipeline is lower than that in normal operation, the frosting phenomenon is easy to generate when the outdoor environment temperature is higher, and therefore the first temperature threshold value is set to be larger than the second temperature threshold value, and the opportunity of judging whether the air conditioner enters the low-temperature refrigeration mode or not is more accurate when the air conditioner is started. That is, by the control method, the invention improves the judgment precision of whether the air conditioner enters the low-temperature refrigeration mode, and effectively reduces or avoids the phenomenon of icing/frosting of the indoor unit of the air conditioner.
After the air conditioner enters a low-temperature refrigeration mode, the control mode that the inner fan runs at the target rotating speed is adopted when the rotating speed of the inner fan is smaller than the target rotating speed, so that the heat exchange degree of indoor hot air and an evaporator can be accelerated, the phenomenon that the evaporator of the indoor unit is frozen or frosted is reduced or avoided, and the refrigeration effect and the running stability of the air conditioner are improved. The control mode of the frequency of the compressor is adjusted when the actual temperature of the coil pipe of the indoor unit is different from the target temperature, so that the actual temperature of the coil pipe of the indoor unit can be correspondingly adjusted to reach or approach the target temperature, the phenomenon that an evaporator of the indoor unit is frozen or frosted is reduced or avoided, and the refrigeration effect and the operation stability of the air conditioner are improved.
Drawings
A control method of an air conditioner of the present invention is described below with reference to the accompanying drawings. In the drawings:
fig. 1 is a flowchart illustrating a control method of an air conditioner according to the present invention;
fig. 2 is a logic diagram illustrating the entry/exit of the low temperature cooling mode of the control method of the air conditioner according to the present invention;
fig. 3 is a schematic control flow diagram of an inner fan of the control method of the air conditioner according to the present invention;
fig. 4 is a schematic control flow diagram of a compressor according to a control method of an air conditioner of the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. 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. For example, although the frequency threshold of the compressor in the figures is 0, this value is not constant and can be adjusted as desired by one skilled in the art to suit the particular application.
It should be noted that, for those skilled in the art, the air conditioner includes components such as a compressor, an outdoor unit, an indoor unit, a throttling element, and a control chip, and the connection relationship between the above components, the cooling and heating principle of the air conditioner, and the like are known, and will not be described in detail herein.
The invention provides a control method of an air conditioner, aiming at solving the problem of poor refrigeration effect caused by the fact that an indoor unit is easy to frost when the air conditioner runs in a refrigeration mode under a low-temperature environment in the prior art.
Referring first to fig. 1 and 2, fig. 1 is a schematic flow chart of a control method of an air conditioner according to the present invention; fig. 2 is a logic diagram illustrating the entry/exit of the low temperature cooling mode in the control method of the air conditioner according to the present invention. As shown in fig. 1, the air conditioner control method of the present invention mainly includes the following steps:
s100, acquiring an operation mode of the air conditioner, for example, acquiring the current operation mode of the air conditioner through a control chip of the air conditioner, wherein the operation mode can comprise a refrigeration mode, a heating mode, a dehumidification mode, an air supply mode and the like;
s200, when the operation mode is the refrigeration mode, acquiring the operation frequency of the air conditioner compressor and the outdoor environment temperature, if the control chip acquires that the operation mode of the air conditioner is the refrigeration mode, further acquiring the operation frequency of the compressor by acquiring the motor operation parameters of the compressor, and acquiring the outdoor environment temperature by arranging a temperature sensor or a temperature acquisition device and the like on the outdoor unit;
s300, judging whether the air conditioner enters the low-temperature refrigeration mode or not based on the operation frequency and the outdoor environment temperature, if so, judging the operation state of the compressor based on the operation frequency, and further judging whether the air conditioner enters the low-temperature refrigeration mode or not based on the outdoor environment temperature when the compressor is in different operation states.
In a possible implementation, the step S300 further includes:
1) when the operation frequency is not greater than the frequency threshold and the outdoor environment temperature is not greater than the first temperature threshold within a first set time, the air conditioner is enabled to enter a low-temperature refrigeration mode, preferably, the frequency threshold is 0, the first set time is 1min, and the first temperature threshold is 15 ℃, that is, when the operation frequency of the compressor is equal to 0, that is, when the compressor is in a starting stage (for example, when the air conditioner is just started or started from a standby state), the outdoor environment temperature is further determined, and when the outdoor environment temperature continues for 1 minute and is less than 15 ℃, the air conditioner is enabled to enter the low-temperature refrigeration mode.
2) When the operation frequency is greater than the frequency threshold and the outdoor environment temperature is not greater than a second temperature threshold within a first set time, the air conditioner is enabled to enter a low-temperature refrigeration mode, preferably, the second set time is 1min, the second temperature threshold is less than the first temperature threshold and the second temperature threshold is 14 ℃, that is, when the operation frequency of the compressor is not greater than 0, that is, the compressor is in an operation stage (for example, when the air conditioner is in a refrigeration operation stage), the outdoor environment temperature is further determined, and when the outdoor environment temperature continues for 1 minute and is less than 14 ℃, the air conditioner is enabled to enter the low-temperature refrigeration mode.
In addition, after the air conditioner enters the low-temperature cooling mode according to the determination condition 1), the method for controlling the air conditioner may further include:
acquiring the outdoor environment temperature, and acquiring the outdoor environment temperature in real time through a temperature sensor or a temperature acquisition device after entering a low-temperature refrigeration mode;
and when the outdoor environment temperature is greater than a third temperature threshold value, the air conditioner is made to exit the low-temperature refrigeration mode, preferably, the third temperature threshold value is 20 ℃, and when the outdoor environment temperature is greater than 20 ℃, the air conditioner is made to exit the low-temperature refrigeration mode.
In addition, after the air conditioner enters the low-temperature cooling mode according to the determination condition 2), the method for controlling the air conditioner may further include:
acquiring the outdoor environment temperature, and acquiring the outdoor environment temperature in real time through a temperature sensor or a temperature acquisition device after entering a low-temperature refrigeration mode;
and when the outdoor environment temperature is higher than a fourth temperature threshold value, the air conditioner is enabled to exit the low-temperature refrigeration mode, preferably, the fourth temperature threshold value is lower than the third temperature threshold value and is 18 ℃, and when the outdoor environment temperature is higher than 18 ℃, the air conditioner is enabled to exit the low-temperature refrigeration mode.
The invention can refine the judgment time of whether the air conditioner enters the low-temperature refrigeration mode or not, improve the judgment precision of entering the low-temperature refrigeration mode, ensure that the time of entering the low-temperature refrigeration mode is more accurate and the coverage range is wider, and further effectively reduce or avoid the phenomenon of icing/frosting of an evaporator of an indoor unit of the air conditioner.
Specifically, by determining whether the operating frequency of the compressor is 0, whether to enter the low-temperature cooling mode may be divided into a compressor start-up phase and a compressor operating phase. Because the compressor is when the start-up stage, the refrigerant temperature in the refrigerant pipeline is lower than when normal operating, under this condition, also produces icing or frosting phenomenon easily when outdoor environment temperature is higher, consequently sets up first temperature threshold value and sets up to be greater than the second temperature threshold value, can cover more condition that icing/frosting phenomenon appears, has improved the judgement precision who gets into low temperature refrigeration mode. The setting mode that the fourth temperature threshold is smaller than the third temperature threshold prolongs the running time of entering the low-temperature refrigeration mode under the condition of the starting stage of the compressor, so that the phenomenon of icing or frosting is not easy to occur after the air conditioner exits the low-temperature refrigeration mode. And the first set time and the second set time can reduce the influence of sudden fluctuation of the temperature on the judgment result, and further improve the accuracy of judgment.
Of course, the specific values mentioned above are only used for illustrating the principle of the present invention, and are not intended to limit the protection scope of the present invention, and those skilled in the art can adjust the values mentioned above so that the present invention can be applied to more specific application scenarios without departing from the principle of the present invention. For example, the frequency threshold may also be a value near 0, such as 0.2, 0.5, etc.; the first temperature threshold and the second temperature threshold may also be set to 16 ℃ or 13 ℃, respectively, as long as they satisfy the condition that the first temperature threshold is greater than the second temperature threshold; the first setting time and the second setting time may be different, and may also be set to other values, such as 10s, 20s, 30s, or 1.5min, or even not set; the third temperature threshold and the fourth temperature threshold may also be 19 ℃ and 17 ℃, respectively, as long as the condition that the fourth temperature threshold is less than the third temperature threshold is satisfied.
Next, referring to fig. 2 in conjunction with fig. 1, a specific judgment process of the air conditioner control method of the present invention will be described. In one possible embodiment, the process of determining whether the air conditioner enters the low-temperature cooling mode may be:
and judging whether the operation mode is a refrigeration mode or not in the process of starting the air conditioner. If the air conditioner runs in the air supply mode at the moment, the air conditioner runs according to the air supply mode; and if the air conditioner is in the refrigeration mode, further acquiring the running frequency of the compressor, and further judging whether to enter the low-temperature refrigeration mode or not based on the compressor frequency.
(1) If the operating frequency of the compressor is 0, the compressor is certified in the start-up phase. At the moment, acquiring the outdoor environment temperature, judging whether the outdoor environment temperature is continuously lower than 15 ℃ within 1 minute, and if the outdoor environment temperature meets the conditions, entering a low-temperature refrigeration mode; otherwise, the operation is continued according to the air supply mode. After entering the low-temperature refrigeration mode, the air conditioner detects the outdoor environment temperature in real time, and if the outdoor environment temperature is higher than 20 ℃, the air conditioner exits the low-temperature refrigeration mode, so that the air conditioner continues to operate according to the air supply mode.
(2) If the operating frequency of the compressor is not 0, the compressor is certified to be in an operating phase. At the moment, acquiring the outdoor environment temperature, judging whether the outdoor environment temperature is continuously lower than 14 ℃ within 1 minute, and if the outdoor environment temperature meets the conditions, entering a low-temperature refrigeration mode; otherwise, the operation is continued according to the air supply mode. After entering the low-temperature refrigeration mode, the air conditioner detects the outdoor environment temperature in real time, and if the outdoor environment temperature is higher than 18 ℃, the low-temperature refrigeration control is quitted, so that the air conditioner continues to operate according to the air supply mode.
Referring to fig. 3 and 4, fig. 3 is a schematic control flow diagram of an internal fan of the control method of the air conditioner according to the present invention; fig. 4 is a schematic control flow diagram of a compressor according to a control method of an air conditioner of the present invention.
In one possible embodiment, after the air conditioner enters the low temperature cooling mode, the control method of the air conditioner may further include:
s1, acquiring the rotating speed of the inner fan, for example, acquiring the operating parameters (such as the rotating speed) of a driving motor of the inner fan through a control chip to acquire the rotating speed of the inner fan;
and S2, when the rotating speed of the inner fan is lower than the target rotating speed, the inner fan is enabled to operate at the target rotating speed, for example, when the target rotating speed is the corresponding rotating speed (for example, 600r/min) when the middle-gear wind power of the air conditioner, and when the rotating speed of the inner fan is lower than 600r/min (for example, when the current wind power of the air conditioner is a gentle wind gear or a low wind gear), the inner fan is enabled to operate at 600 r/min.
The control method has the advantages that: when the rotating speed of the inner fan is lower than the target rotating speed, the inner fan is controlled to operate at the target rotating speed, so that the heat exchange degree between indoor hot air and the evaporator can be accelerated, the phenomenon that the evaporator of the indoor unit freezes or frosts is reduced or avoided, and the refrigerating effect and the operation stability of the air conditioner are improved.
Of course, the setting mode and specific value of the target rotation speed are not exclusive, and those skilled in the art can adjust the target rotation speed so that the target rotation speed is suitable for more specific application scenarios. For example, the target rotation speed may be a rotation speed corresponding to high-grade wind power (for example, 1000r/min), and the middle-grade wind power may be 500r/min or 700 r/min.
In another possible embodiment, after the air conditioner enters the low temperature cooling mode, the control method of the air conditioner may further include:
s10, acquiring the actual temperature of the coil pipe of the indoor unit, for example, acquiring the actual temperature of the coil pipe of the indoor unit by arranging a temperature sensor on the coil pipe of the indoor unit;
s20, obtaining a target temperature of the indoor unit coil, preferably, the target temperature of the indoor unit coil may be determined based on the outdoor environment temperature, and for example, when the outdoor environment temperature is 0 ℃, the target temperature of the corresponding indoor unit coil may be 8 ℃; when the outdoor environment temperature is-10 ℃, the target temperature of the corresponding indoor unit coil pipe can be 7 ℃;
in one possible embodiment, the target temperature of the indoor unit coil can be obtained from table 1:
TABLE 1
| Actual temperature range (. degree. C.) | Target temperature (. degree.C.) |
| (-∞,-11) | 6 |
| [-11,-7) | 7 |
| [-7,-3) | 8 |
| [-3,3) | 8 |
| [3,9) | 9 |
| [9,15] | 9 |
It should be noted that, the table 1 is a corresponding relationship between the actual temperature and the target temperature of the indoor unit coil obtained after repeated experiments by the inventor, and the target temperature in the table represents the temperature of the indoor unit coil when the air conditioner has the best refrigeration effect or the best effect of avoiding freezing/frosting in the corresponding actual temperature range.
And S30, adjusting the operating frequency of the air conditioner compressor based on the target temperature and the actual temperature, and preferably, adjusting the operating frequency of the air conditioner compressor based on the difference value between the target temperature and the actual temperature.
Wherein, step S30 may further include:
i) when the actual temperature is higher than the target temperature, the compressor is subjected to frequency boosting, and if the outdoor environment temperature is 0 ℃, the actual temperature of an indoor unit coil is 10 ℃, the target temperature is 8 ℃ (refer to table 1), and the difference between the actual temperature and the target temperature is 2, the compressor can be subjected to frequency boosting control;
ii) when the actual temperature is lower than the target temperature, the compressor is down-converted, for example, when the outdoor environment temperature is 0 ℃, the actual temperature of the indoor unit coil is 6 ℃, the target temperature is 8 ℃ (refer to table 1), and the difference between the actual temperature and the target temperature is-2, the compressor can be down-converted.
In one possible embodiment, the difference between the target temperature and the actual temperature may be used as the frequency value for the compressor up-conversion or down-conversion. Still taking the outdoor environment temperature as 0 ℃ as an example, if the actual temperature of the indoor unit coil is 10 ℃, the target temperature is 8 ℃ (refer to table 1), and the difference between the actual temperature and the target temperature is 2, the compressor can be boosted by 2Hz at the current operating frequency of the compressor; if the actual temperature of the coil of the indoor unit is 6 ℃, the target temperature is 8 ℃ (refer to table 1) and the difference between the actual temperature and the target temperature is-2), the frequency of the compressor can be reduced by 2Hz at the current operating frequency of the compressor.
The control method has the advantages that: when the actual temperature of the coil pipe of the indoor unit is higher than the target temperature (at the moment, an evaporator of the indoor unit is not easy to frost, but the refrigerating effect of the air conditioner is poor), the refrigerating capacity of the compressor is increased by a control mode of increasing the frequency of the compressor, so that the actual temperature of the coil pipe of the indoor unit is quickly reduced and approaches or reaches the target temperature, and the refrigerating effect of the air conditioner is improved; when the actual temperature of the coil pipe of the indoor unit is lower than the target temperature (the refrigeration effect of the air conditioner is good at the moment, but the evaporator of the indoor unit is easy to frost), the frequency of the compressor is reduced in a control mode, so that the refrigerating capacity of the compressor is reduced, the actual temperature of the coil pipe of the indoor unit is quickly raised and approaches or reaches the target temperature, the phenomenon that the evaporator of the indoor unit is frozen or frosted is reduced or avoided, and the stability of the air conditioner is improved.
Of course, the setting manner of the frequency increasing or decreasing value of the compressor is not constant, and those skilled in the art can adjust the frequency increasing or decreasing value so that the frequency increasing or decreasing value is suitable for a more specific application scenario. For example, the frequency modulation value of the compressor may be multiplied by a frequency modulation factor (e.g., multiplied by 2) based on the difference between the actual temperature and the target temperature.
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 control method of an air conditioner, characterized by comprising the steps of:
acquiring an operation mode of an air conditioner;
when the operation mode is a refrigeration mode, acquiring the operation frequency and the outdoor environment temperature of the air-conditioning compressor;
judging whether to enable the air conditioner to enter a low-temperature refrigeration mode or not based on the operating frequency and the outdoor environment temperature;
wherein the step of determining whether to cause the air conditioner to enter the low temperature cooling mode based on the operating frequency and the outdoor ambient temperature further comprises:
when the running frequency is not greater than a frequency threshold and the outdoor environment temperature is not greater than a first temperature threshold within a first set time, enabling the air conditioner to enter the low-temperature refrigeration mode; or
When the operating frequency is greater than the frequency threshold and the outdoor environment temperature is not greater than a second temperature threshold within a second set time, enabling the air conditioner to enter the low-temperature refrigeration mode;
wherein the second temperature threshold is less than the first temperature threshold.
2. The control method of an air conditioner according to claim 1, wherein the frequency threshold is zero.
3. The control method of an air conditioner according to claim 1 or 2, wherein after the step of "causing the air conditioner to enter the low temperature cooling mode", the control method of an air conditioner further comprises:
acquiring the rotating speed of the inner fan;
and when the rotating speed of the inner fan is less than the target rotating speed, the inner fan is enabled to operate at the target rotating speed.
4. The control method of an air conditioner according to claim 1 or 2, wherein after the step of "causing the air conditioner to enter the low temperature cooling mode", the control method of an air conditioner further comprises:
acquiring the actual temperature of the coil pipe of the indoor unit;
acquiring a target temperature of the indoor unit coil;
and adjusting the operating frequency of the air-conditioning compressor based on the target temperature and the actual temperature.
5. The control method of an air conditioner according to claim 4, wherein the target temperature is determined based on an outdoor ambient temperature.
6. The method of claim 4, wherein the step of adjusting the operating frequency of the air conditioner compressor based on the target temperature and the actual temperature further comprises:
when the actual temperature is higher than the target temperature, raising the frequency of the compressor; or
And when the actual temperature is lower than the target temperature, the compressor is subjected to frequency reduction.
7. The control method of an air conditioner according to claim 5, wherein a frequency value at which the compressor is upscaled or downscaled is determined based on a difference between the target temperature and the actual temperature.
8. The method of controlling an air conditioner according to claim 1, wherein after the step of "entering the air conditioner into the low temperature cooling mode when the operation frequency is not greater than a frequency threshold and the outdoor ambient temperature is not greater than a first temperature threshold for a first set time", the method further comprises:
acquiring the outdoor environment temperature;
and when the outdoor environment temperature is greater than a third temperature threshold value, enabling the air conditioner to exit the low-temperature refrigeration mode.
9. The method of claim 1, wherein after the step of entering the air conditioner into the low temperature cooling mode when the operation frequency is greater than the frequency threshold and the outdoor environment temperature is not greater than a second temperature threshold for a second set time, the method further comprises:
acquiring the outdoor environment temperature;
and when the outdoor environment temperature is greater than a fourth temperature threshold value, enabling the air conditioner to exit the low-temperature refrigeration mode.
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| CN109269020A (en) * | 2018-10-15 | 2019-01-25 | 珠海格力电器股份有限公司 | Air conditioning control method, control device and air-conditioning |
| CN110486901B (en) * | 2019-08-02 | 2021-07-23 | 青岛海尔空调器有限总公司 | Method and device for low-temperature refrigeration |
| CN110567139B (en) * | 2019-08-30 | 2021-02-26 | 珠海格力电器股份有限公司 | Frequency limiting and frequency reducing control method and device for photovoltaic air conditioner and photovoltaic air conditioner |
| CN111023515B (en) * | 2019-12-18 | 2021-08-13 | 广东美的制冷设备有限公司 | Air conditioner, refrigeration control method of air conditioner and storage medium |
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| CN113137714B (en) * | 2021-03-15 | 2022-07-22 | 珠海格力电器股份有限公司 | Air conditioner, oil return control method and device for compressor of air conditioner and storage medium |
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