CN110375423B - Fan speed regulation control method and air conditioner - Google Patents

Fan speed regulation control method and air conditioner Download PDF

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Publication number
CN110375423B
CN110375423B CN201910728923.1A CN201910728923A CN110375423B CN 110375423 B CN110375423 B CN 110375423B CN 201910728923 A CN201910728923 A CN 201910728923A CN 110375423 B CN110375423 B CN 110375423B
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temperature
actual
evaporation temperature
target
evaporation
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CN110375423A (en
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张秋玉
刘潘
陈华
黄春
刘合心
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Ningbo Aux Electric Co Ltd
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Ningbo Aux Electric 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
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • 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
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature
    • F24F2110/12Temperature of the outside air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00Control inputs relating to system states
    • F24F2140/20Heat-exchange fluid temperature
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention provides a fan speed regulation control method and an air conditioner, and relates to the technical field of air conditioners. The invention provides a fan speed regulation control method, which is applied to the rotation speed regulation of an outdoor unit fan in a heating mode of an air conditioner and comprises the following steps: and calculating the target evaporation temperature according to the outer ring temperature. The target evaporation temperature and an actual evaporation temperature are compared, wherein the actual evaporation temperature represents a tube temperature of the outdoor heat exchanger. And controlling the rotating speed of the outdoor unit fan according to the comparison result of the target evaporation temperature and the actual evaporation temperature. The invention also provides an air conditioner which can apply the fan speed regulation control method. The fan speed regulation control method and the air conditioner provided by the invention can improve the heating effect, ensure that the fan speed regulation control method has good regulation effect under the condition of different external environment temperatures, and improve the controllability of a system.

Description

Fan speed regulation control method and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a fan speed regulation control method and an air conditioner.
Background
With the deep development and research of the air conditioning field, the air conditioner technology is more mature, and the air conditioning field is also in the aspects of further improving the energy efficiency, the comfort level provided by the air conditioner and even the deficiency of appearance. However, the air conditioner field has more technical problems to be solved.
At present, the rotating speed of an outdoor fan is controlled according to the evaporation temperature during multi-split air conditioning, the evaporation temperature is set to be upper and lower limits, the fan with the evaporation temperature lower than the lower limit value runs at the highest gear, and the fan with the evaporation temperature higher than the upper limit value stops. According to the control method, when the heating operation is carried out at different environmental temperatures, the evaporation temperature ranges for adjusting the rotating speed of the outdoor fan are the same. However, when the outer ring temperature is too low, the heating operation outdoor fan is always operated at the highest gear. Meanwhile, when the temperature of the outer ring is too high, the outdoor fan of the heating operation chamber is always stopped. When the outer ring temperature is too low and too high, the fan does not have the function of adjusting the evaporation temperature.
Disclosure of Invention
The invention solves the problem of how to improve the heating effect, ensure good regulation effect under the condition of different external environment temperatures and improve the system controllability.
In order to solve the above problems, the present invention provides a fan speed control method, which is applied to the rotation speed regulation of an outdoor unit fan in a heating mode of an air conditioner, and the fan speed control method comprises:
and calculating the target evaporation temperature according to the outer ring temperature.
Comparing the target evaporation temperature with an actual evaporation temperature, wherein the actual evaporation temperature represents a tube temperature of an outdoor heat exchanger.
And controlling the rotating speed of the outdoor unit fan according to the comparison result of the target evaporation temperature and the actual evaporation temperature.
Compared with the prior art, the fan speed regulation control method provided by the embodiment of the invention has the beneficial effects that:
the fan speed regulation control method provided by the embodiment of the invention can generate the adaptive target evaporation temperature under different external environment temperature conditions by setting different target evaporation temperatures according to different external environment temperatures, and control the rotating speed of the outdoor unit fan according to the adaptive target evaporation temperature and the actual evaporation temperature, so that the heat exchange efficiency of the outdoor heat exchanger and the external environment can be improved at different actual evaporation temperatures, and the heating efficiency is further improved. The outdoor unit fan can be regulated according to different target evaporation temperatures under different external environment temperatures, the purpose of good regulation effect under different external environment temperatures can be achieved, and the system controllability is improved.
Optionally, the step of calculating the target evaporation temperature according to the outer loop temperature comprises:
and setting a first calculation coefficient according to the outer ring temperature.
And calculating the target evaporation temperature by subtracting the first calculation coefficient from the outer ring temperature.
A first calculation coefficient is set by the outer ring temperature, and a target evaporation temperature is calculated by the first calculation coefficient and the outer ring temperature. The different first calculation coefficients can be set at the temperatures of different outer ring temperatures, so that the adaptive target evaporation temperature can be calculated through the different first calculation coefficients corresponding to the different outer ring temperatures, the outdoor unit fan can be regulated according to the different target evaporation temperatures under the condition of different outer ring temperatures, the purpose of good regulation effect under the condition of different outer ring temperatures can be achieved, and the system controllability is improved.
Optionally, the step of setting the first calculation coefficient according to the outer ring temperature comprises:
and comparing the outer ring temperature with a first preset temperature.
And when the outer ring temperature is less than or equal to the first preset temperature, setting a first set value as the first calculation coefficient.
And when the outer ring temperature is higher than the first preset temperature, comparing the outer ring temperature with a second preset temperature, wherein the first preset temperature is lower than the second preset temperature.
And when the outer ring temperature is lower than the second preset temperature, setting a second set value as the first calculation coefficient.
And when the outer ring temperature is greater than or equal to the second preset temperature, setting a third set value as the first calculation coefficient.
The first set value, the second set value, and the third set value are not all equal.
The target evaporation temperature is calculated by setting the first set value, the second set value and the third set value which are not all equal, and then different target evaporation temperatures are calculated according to different external environment temperatures, so that the speed of the outdoor unit fan can be regulated according to different target evaporation temperatures under different external environment temperatures, the purpose of good regulation effect under different external environment temperatures can be achieved, and the system controllability is improved.
Optionally, the first set value is smaller than the second set value, and the second set value is smaller than the third set value.
By setting the first set value, the second set value and the third set value which are sequentially increased, the outer ring temperature can be set to be the first set value, the second set value and the third set value which are increased in gradient when being increased, the target evaporation temperature which is gradually increased can be adaptively set when the outer ring temperature is increased, the efficient heat exchange efficiency of the outdoor unit can be guaranteed under the condition of different outer ring temperatures, and the heating effect is further guaranteed.
Optionally, the step of comparing the target evaporation temperature and the actual evaporation temperature comprises:
and calculating a first evaporation temperature threshold value and a second evaporation temperature threshold value according to the target evaporation temperature, wherein the first evaporation temperature threshold value is smaller than the second evaporation temperature threshold value.
The step of controlling the rotation speed of the outdoor unit fan according to the comparison result of the target evaporation temperature and the actual evaporation temperature includes:
and controlling the rotating speed of the outdoor unit fan according to the actual evaporation temperature, the target evaporation temperature, the first evaporation temperature threshold and the second evaporation temperature threshold.
The first evaporation temperature threshold and the second evaporation temperature threshold are set according to the target evaporation temperature, and the rotating speed of the outdoor unit fan is controlled according to the actual evaporation temperature, the target evaporation temperature, the first evaporation temperature threshold and the second evaporation temperature threshold, so that the control can be carefully provided for the outdoor unit fan, and the accuracy of controlling the rotating speed of the outdoor unit fan is further ensured.
Optionally, the step of calculating a first evaporation temperature threshold and a second evaporation temperature threshold according to the target evaporation temperature comprises:
and calculating the target evaporation temperature minus a second calculation coefficient to obtain the first evaporation temperature threshold value.
And calculating the target evaporation temperature and a third calculation coefficient to obtain the second evaporation temperature threshold value.
Optionally, the step of controlling the rotation speed of the outdoor unit fan according to the actual evaporation temperature, the target evaporation temperature, the first evaporation temperature threshold and the second evaporation temperature threshold includes:
comparing the actual evaporating temperature to the first evaporating temperature threshold.
And when the actual evaporation temperature is less than or equal to the first evaporation temperature threshold value, controlling the outdoor unit fan to operate at the highest rotating speed.
And when the actual evaporation temperature is greater than the first evaporation temperature threshold value, comparing the actual evaporation temperature with the second evaporation temperature threshold value.
And when the actual evaporation temperature is greater than the second evaporation temperature threshold value, controlling the outdoor unit fan to stop.
When the actual evaporation temperature is less than or equal to the second evaporation temperature threshold, comparing the actual evaporation temperature with the target evaporation temperature.
And when the actual evaporation temperature is less than or equal to the target evaporation temperature, controlling the outdoor unit fan to operate at a first rotating speed.
And when the actual evaporation temperature is higher than the target evaporation temperature, controlling the outdoor unit fan to operate at a second rotating speed.
The first rotating speed and the second rotating speed are both smaller than the highest rotating speed of the outdoor unit fan.
The rotary speed control that can carry out the difference respectively to actual evaporating temperature's actual conditions can realize the multistage regulation and control to off-premises station fan rotational speed, just can realize improving the heat exchange efficiency of outdoor heat exchanger and external environment, and then promotes the purpose of heating efficiency.
Optionally, before the step of calculating the target evaporation temperature according to the outer annular temperature, the fan speed control method further includes:
and comparing the actual condensation temperature with the target condensation temperature, wherein the actual condensation temperature represents the pipe temperature of the heat exchanger of the indoor unit.
The step of calculating a target evaporation temperature from an outer loop temperature is performed as a function of the comparison of the actual condensation temperature and the target condensation temperature.
Whether the rotating speed of the outdoor unit fan is within the specified range can be judged through the actual condensing temperature and the target condensing temperature before the rotating speed of the outdoor unit fan is regulated and controlled through the actual evaporating temperature, the rotating speed of the outdoor unit fan is regulated and controlled through the actual evaporating temperature and the target evaporating temperature when the actual condensing temperature reaches the specified range, and the condition that the regulation is invalid through the actual evaporating temperature when the actual condensing temperature is not within the specified range can be avoided.
Optionally, the step of comparing the actual condensing temperature with the target condensing temperature comprises:
calculating a first condensing temperature threshold and a second condensing temperature threshold according to the target condensing temperature, wherein the first condensing temperature threshold is smaller than the second condensing temperature threshold.
The step of performing the step of calculating a target evaporating temperature from an outer loop temperature according to a result of the comparison of the actual condensing temperature and the target condensing temperature includes:
executing the step of calculating a target evaporation temperature from the outer loop temperature according to the actual condensation temperature, the first condensation temperature threshold and the second condensation temperature threshold.
Optionally, the step of calculating a first condensing temperature threshold and a second condensing temperature threshold according to the target condensing temperature comprises:
and calculating the target condensation temperature minus a fourth calculation coefficient to obtain the first condensation temperature threshold.
And calculating the target condensation temperature and a fifth calculation coefficient to obtain the second condensation temperature threshold.
Optionally, the step of performing the step of calculating the target evaporation temperature from the outer loop temperature according to the actual condensation temperature, the first condensation temperature threshold and the second condensation temperature threshold comprises:
obtaining a third condensation temperature threshold value according to the first condensation temperature threshold value and the first correction coefficient;
subtracting the second correction coefficient according to the second condensation temperature threshold to obtain a fourth condensation temperature threshold;
when the actual condensation temperature is increased from being smaller than the first condensation temperature threshold to being greater than or equal to the third condensation temperature threshold, or when the actual condensation temperature is decreased from being greater than the second condensation temperature threshold to being smaller than or equal to the fourth condensation temperature threshold, executing the step of calculating the target evaporation temperature according to the outer loop temperature according to the actual condensation temperature.
The rotating speed of the outdoor unit fan is adjusted through the actual evaporation temperature and the target evaporation temperature when the actual condensation temperature reaches a value which is larger than the sum of the first condensation temperature threshold and the first correction coefficient and smaller than the difference value obtained by subtracting the second correction coefficient from the second condensation temperature, and therefore the situation that the adjustment is invalid through the actual evaporation temperature when the actual condensation temperature is not in the specified range is avoided. Meanwhile, through the setting of the first correction coefficient and the second correction coefficient, the situation that the actual condensation temperature is collapsed due to frequent switching of control when the value of the first condensation temperature threshold value or the value of the second condensation temperature threshold value swings left and right can be avoided.
A fan speed regulation control device comprises:
and the calculation module is used for calculating the target evaporation temperature according to the outer ring temperature, wherein the outer ring temperature represents the temperature of the environment outside the outdoor unit.
And the comparison module is used for comparing the target evaporation temperature with the actual evaporation temperature and obtaining comparison data, wherein the actual evaporation temperature represents the tube temperature of the outdoor heat exchanger.
And the control module is used for controlling the rotating speed of the outdoor unit fan according to the comparison data.
An air conditioner comprises an outdoor unit heat exchanger, an outdoor unit fan and a controller, wherein the outdoor unit fan is arranged close to the outdoor unit heat exchanger and used for guiding airflow to flow through the outdoor unit heat exchanger, and the controller can execute a fan speed regulation control method and control the rotating speed of the outdoor unit fan. The fan speed regulation control method comprises the following steps:
and calculating the target evaporation temperature according to the outer ring temperature.
Comparing the target evaporation temperature with an actual evaporation temperature, wherein the actual evaporation temperature represents a tube temperature of an outdoor heat exchanger.
And controlling the rotating speed of the outdoor unit fan according to the comparison result of the target evaporation temperature and the actual evaporation temperature.
The embodiment of the invention also provides a fan speed regulation control device and an air conditioner, and the beneficial effects of the fan speed regulation control device and the air conditioner relative to the prior art are the same as the beneficial effects of the fan speed regulation control method relative to the prior art, and are not repeated herein.
Drawings
FIG. 1 is a flow chart of a fan speed control method provided in an embodiment of the present invention;
fig. 2 is a detailed flowchart of step S10;
fig. 3 is a detailed flowchart of step S11;
fig. 4 is a detailed flowchart of step S21;
fig. 5 is a detailed flowchart of step S31;
FIG. 6 is a detailed flowchart of step S011;
FIG. 7 is a flowchart illustrating the step S021.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The embodiment provides an air conditioner which can improve a heating effect, ensure that the air conditioner has a good adjusting effect under the condition of different external environment temperatures, and improve the controllability of a system. It should be noted that the air conditioner provided in this embodiment may be a multi-split air conditioner.
It should be noted that, in this embodiment, the air conditioner includes a controller, an outdoor unit and an indoor unit, where the outdoor unit includes a first casing, and an outdoor unit heat exchanger, an outdoor unit fan and an outdoor pipe temperature sensor that are disposed inside the first casing. The outdoor unit fan is used for guiding airflow to flow through the outdoor unit heat exchanger, the outdoor pipe temperature sensor is installed on the outdoor unit heat exchanger, and the outdoor pipe temperature sensor is used for detecting actual evaporation temperature in the outdoor unit heat exchanger pipe. The indoor unit comprises a second shell, an indoor unit heat exchanger and an indoor pipe temperature sensor, wherein the indoor unit heat exchanger and the indoor pipe temperature sensor are arranged in the second shell. The indoor pipe temperature sensor is arranged on the indoor unit heat exchanger and used for detecting the actual condensation temperature of the indoor unit heat exchanger. The indoor unit and the outdoor unit are electrically connected with the controller, and the controller can control the rotating speed of a fan of the outdoor unit according to the outer ring temperature, the actual evaporation temperature and the actual condensation temperature so as to improve the heating effect, ensure that the outdoor unit has good adjusting effect under the condition of different outer environment temperatures and improve the controllability of a system.
In addition, the embodiment further provides a fan speed regulation control method, which can be executed by the controller and control the rotation speed of the outdoor unit fan, so as to achieve the purposes of improving the heating effect, ensuring good regulation effect under the conditions of different external environment temperatures, and improving the system controllability.
It should be noted that, in this embodiment, the fan speed control method is applied to the rotation speed adjustment of the outdoor unit fan in the heating mode of the air conditioner.
Referring to fig. 1, the method for controlling the speed of the fan includes:
and step S10, calculating the target evaporation temperature according to the outer annular temperature.
The outdoor unit can be provided with an environment temperature detection device electrically connected with the controller, so that the outer ring temperature is detected by the environment temperature detection device and is sent to the controller, and the controller and the outer ring temperature can calculate the target evaporation temperature conveniently. It should be understood that the outer loop temperature may also be entered into the controller by way of a manual input.
Alternatively, referring to fig. 1 and fig. 2 in combination, step S10 includes:
step S11, a first calculation coefficient is set according to the outer ring temperature.
Different first calculation coefficients can be set according to different outer ring temperatures, so that the corresponding first calculation coefficients can be correspondingly generated under the external environment conditions of different outer ring temperatures, and the purpose of performing different adjustments on different outer ring temperatures is achieved.
Alternatively, referring to fig. 1, fig. 2 and fig. 3 in combination, in the present embodiment, the step S11 includes:
and step S111, comparing the outer ring temperature with a first preset temperature.
Step S111 may be regarded as determining whether the outer ring temperature is greater than a first preset temperature.
Step S112, when the outer ring temperature is less than or equal to the first preset temperature, setting the first set value as a first calculation coefficient.
Namely, when the result of judging whether the outer ring temperature is greater than the first preset temperature is negative, the first set value is set as a first calculation coefficient. Alternatively, in this embodiment, the first setting value is a numerical value set manually.
And S113, comparing the outer ring temperature with a second preset temperature when the outer ring temperature is higher than the first preset temperature.
That is, when the result of determining whether the outer ring temperature is greater than the first preset temperature is yes, at this time, it is determined whether the outer ring temperature is greater than the second preset temperature. Wherein the first preset temperature is lower than the second preset temperature.
Step S114, when the outer ring temperature is lower than the second preset temperature, setting a second set value as a first calculation coefficient.
That is, when the result of determining whether the outer ring temperature is greater than the second preset temperature is "no", and the outer ring temperature is greater than the first preset temperature and less than the second preset temperature, the second set value is set as the first calculation coefficient. Optionally, in this embodiment, the second setting value is a manually set value.
And S115, when the outer ring temperature is higher than the second preset temperature, setting a third set value as a first calculation coefficient.
That is, when the result of determining whether the outer ring temperature is greater than the second preset temperature is yes, the third set value is set as the first calculation coefficient. Optionally, the third set value is a manually set value.
It should be noted that, in this embodiment, the outer ring temperature is compared with the first preset temperature, and when the outer ring temperature is greater than the first preset temperature, the outer ring temperature is compared with the second preset temperature. In other embodiments, the second preset temperature may be compared with the outer ring temperature, and when the outer ring temperature is lower than the second preset temperature, the outer ring temperature may be compared with the first preset temperature.
Optionally, in this embodiment, the first set value, the second set value, and the third set value are not all equal. That is, the first set value, the second set value, and the third set value may be set in such a manner that, for example, the first set value is equal to the second set value and is smaller than the third set value, or the second set value is equal to the third set value and is larger than the first set value, or the first set value is equal to the third set value and is smaller than or larger than the second set value, or the first set value, the second set value, and the third set value are not equal to each other.
Optionally, in this embodiment, the first set value is smaller than the second set value, and the second set value is smaller than the third set value. The method can realize that the outer ring temperature is sequentially increased, and simultaneously, the first calculation coefficient can be in a form of gradient increase after calculation according to the first set value, the second set value and the third set value, so that the target evaporation temperature can be sequentially increased when the outer ring temperature is increased, the outdoor unit heat exchanger can be ensured to have better heat exchange efficiency by controlling the outdoor unit fan, and the heating effect of the air conditioner can be improved.
Optionally, in this embodiment, the first preset temperature is set to 3 degrees celsius, and the second preset temperature is set to 15 degrees celsius. The first set value is set to 3, the second set value is set to 7, and the third set value is set to 10. That is, in the present embodiment, when the outer ring temperature is less than or equal to 3 degrees celsius, the first set value is set as the first calculation coefficient, and the first calculation coefficient is equal to 3 at this time. And when the temperature of the outer ring is more than 3 ℃ and less than 15 ℃, setting a second set value as a first calculation coefficient, wherein the first calculation coefficient is equal to 7. And when the outer ring temperature is greater than or equal to 15 ℃, setting a third set value as a first calculation coefficient, wherein the first calculation coefficient is equal to 10.
And step S12, calculating the outer ring temperature and subtracting the first calculation coefficient to obtain the target evaporation temperature.
The target evaporation temperature is obtained by subtracting the first calculation coefficient from the outer ring temperature, the adaptive target evaporation temperature can be calculated according to different outer ring temperatures, the outdoor unit fan can be regulated according to different target evaporation temperatures under different conditions of the outer ring temperatures, the purpose of good regulation effect under different conditions of the outer ring temperatures can be achieved, and the system controllability is improved.
For example, when the outer ring temperature is 0 degrees celsius, the first calculation coefficient is set to 3, and the target evaporation temperature is equal to the outer ring temperature 0 minus the first calculation coefficient of 3, resulting in a target evaporation temperature of-3 degrees celsius.
And step S20, comparing the target evaporation temperature with the actual evaporation temperature.
The actual evaporation temperature is detected by the outdoor tube temperature sensor and sent to the controller, and the controller compares the target evaporation temperature with the actual evaporation temperature.
Step S20 includes:
and step S21, calculating a first evaporation temperature threshold value and a second evaporation temperature threshold value according to the target evaporation temperature.
Note that, the first evaporation temperature threshold is smaller than the second evaporation temperature threshold. The first evaporation temperature threshold value and the second evaporation temperature threshold value which is larger than the first evaporation temperature threshold value are obtained through calculation of the target evaporation temperature, an interval range can be formed through the first evaporation temperature threshold value and the second evaporation temperature threshold value, and the interval range is compared with the actual evaporation temperature, so that the speed regulation accuracy of the outdoor unit fan is improved.
Referring to fig. 1 and 4, step S21 includes:
and step S211, calculating the target evaporation temperature and adding a second calculation coefficient to obtain a first evaporation temperature threshold value.
Optionally, in this embodiment, the second calculation coefficient is a value set manually.
And step S212, calculating the target evaporation temperature and subtracting a third calculation coefficient to obtain a second evaporation temperature threshold value.
Alternatively, in the present embodiment, the third calculation coefficient is a value set manually. In addition, the second calculation coefficient and the third calculation coefficient may not be equal. Optionally, in this embodiment, a value of the second calculation coefficient is equal to a value of the third calculation coefficient.
Optionally, in this embodiment, values of the second calculation coefficient and the third calculation coefficient are both 1 degree celsius, that is, the first evaporation temperature threshold set by the target evaporation temperature is the target evaporation temperature minus 1 degree celsius, and the second evaporation temperature threshold is the target evaporation temperature plus 1 degree celsius. It should be understood that in other embodiments, the second and third calculated coefficients can be set to other values, i.e., the first and second evaporating temperature thresholds can be set to other values.
In addition, the order of step S211 and step S212 may be exchanged.
And step S30, controlling the rotating speed of the outdoor fan and the rotating speed of the fan according to the comparison result of the target evaporation temperature and the actual evaporation temperature.
Wherein, can be through comparing the size relation between target evaporating temperature and the actual evaporating temperature, can realize setting for different target evaporating temperature through the outer ambient temperature according to the difference to make and generate the target evaporating temperature of adaptation under the outer ambient temperature condition of difference, and the rotational speed of off-premises station fan is controlled according to the target evaporating temperature and the actual evaporating temperature of adaptation, and then can improve the heat exchange efficiency of outdoor heat exchanger and external environment when the actual evaporating temperature of difference, and then promote heating efficiency. The outdoor unit fan can be regulated according to different target evaporation temperatures under different external environment temperatures, the purpose of good regulation effect under different external environment temperatures can be achieved, and the system controllability is improved.
Note that, after step S21 is completed, step S30 includes:
and step S31, controlling the rotating speed of the outdoor unit fan according to the actual evaporation temperature, the target evaporation temperature, the first evaporation temperature threshold and the second evaporation temperature threshold.
Alternatively, referring to fig. 1 and fig. 5 in combination, step S31 includes:
step S311 compares the actual evaporation temperature with the first evaporation temperature threshold.
Step S311 may be regarded as determining whether the actual evaporation temperature is greater than a first evaporation temperature threshold.
And S312, when the actual evaporation temperature is less than or equal to the first evaporation temperature threshold value, controlling the outdoor unit fan to operate at the highest rotating speed.
The judgment result that whether the actual evaporation temperature is greater than the first evaporation temperature threshold value is judged to be 'no', at the moment, the controller controls the outdoor unit fan to operate at the highest rotating speed, and therefore the outdoor unit heat exchanger is guaranteed to have high heat exchange efficiency, and the heating effect is improved.
And step 313, comparing the actual evaporation temperature with a second evaporation temperature threshold when the actual evaporation temperature is greater than the first evaporation temperature threshold.
That is, when the determination result of determining whether the actual evaporation temperature is greater than the first evaporation temperature threshold is yes, the actual evaporation temperature is compared with the second evaporation temperature threshold, and it can be considered as determining whether the actual evaporation temperature is greater than the second evaporation temperature threshold.
And step S314, controlling the outdoor unit fan to stop when the actual evaporation temperature is greater than the second evaporation temperature threshold value.
That is, when the determination result of determining whether the actual evaporation temperature is greater than the second evaporation temperature threshold is yes, the outdoor unit fan is controlled to stop, that is, the outdoor unit fan can be controlled to stop or to stand by through the controller.
And step S315, comparing the actual evaporation temperature with the target evaporation temperature when the actual evaporation temperature is less than or equal to the second evaporation temperature threshold.
That is, when the determination result of determining whether the actual evaporation temperature is greater than the second evaporation temperature threshold is "no", the actual evaporation temperature is greater than the first evaporation temperature threshold and less than or equal to the second evaporation temperature threshold at this time. At this time, the controller compares the actual evaporating temperature with the target evaporating temperature. Likewise, step S315 may be viewed as determining whether the actual evaporation temperature is greater than the target evaporation temperature.
And step S316, when the actual evaporation temperature is less than or equal to the target evaporation temperature, controlling the outdoor unit fan to operate at a first rotating speed.
That is, when the determination result of determining whether the actual evaporation temperature is greater than the target evaporation temperature is "no", the actual evaporation temperature is greater than the first evaporation temperature threshold and less than or equal to the target evaporation temperature threshold at this time. The controller controls the outdoor unit fan to operate at a first rotation speed. It should be noted that the first rotation speed is less than the maximum rotation speed of the outdoor unit fan.
And step S317, when the actual evaporation temperature is higher than the target evaporation temperature, controlling the outdoor unit fan to operate at a second rotating speed.
That is, when the determination result of determining whether the actual evaporation temperature is greater than the target evaporation temperature is yes, the actual evaporation temperature is greater than the target evaporation temperature and less than or equal to the second evaporation temperature threshold. The controller controls the outdoor unit fan to operate at a second rotation speed, which is less than the maximum rotation speed of the outdoor unit fan.
In this embodiment, the first rotation speed is greater than the second rotation speed. It should be appreciated that in other embodiments, the first rotational speed may be equal to the second rotational speed, or the first rotational speed may be less than the second rotational speed.
In this embodiment, in the process that the actual evaporation temperature is increased from being smaller than the first evaporation temperature threshold to being larger than the first evaporation temperature threshold, the rotation speed of the outdoor unit fan may be controlled as follows: when the actual evaporation temperature is less than or equal to the first evaporation temperature threshold, the controller controls the outdoor unit fan to operate at the highest gear, namely, the outdoor unit fan can operate at the highest rotating speed; when the actual evaporation temperature is increased to a state which is greater than the first evaporation temperature threshold and less than or equal to the target evaporation temperature from a state which is less than or equal to the first evaporation temperature threshold, the controller controls the outdoor unit fan to lower by one gear, so that the outdoor unit fan can be operated at the first rotating speed. Or when the actual evaporation temperature is greater than the second evaporation temperature threshold, the controller controls the outdoor unit fan to stop rotating at the moment, namely the outdoor unit fan stops; when the actual evaporation temperature is reduced from the state of being greater than the second evaporation temperature threshold value to the state of being less than or equal to the second evaporation temperature threshold value and being greater than the target evaporation temperature threshold value, the controller controls the outdoor unit fan to be raised by one gear, and then the outdoor unit fan can be enabled to run at the second rotating speed. In addition, it should be noted that when the first rotation speed is greater than the second rotation speed, and the actual evaporation temperature is increased from a state of being greater than the first evaporation temperature threshold and being less than or equal to the target evaporation temperature to a state of being greater than the target evaporation temperature and being less than or equal to the second evaporation temperature threshold, it may be regarded that the controller controls the outdoor unit fan to decrease by one gear, that is, the rotation speed of the outdoor unit fan can be decreased from the first rotation speed to the second rotation speed for operation. When the first rotating speed is equal to the second rotating speed, the actual evaporation temperature changes in an interval formed by the first evaporation temperature threshold value and the second evaporation temperature threshold value, and the gear or the rotating speed of the outdoor unit fan is not affected. When the first rotation speed is lower than the second rotation speed and the actual evaporation temperature is increased from a state of being greater than the first evaporation temperature threshold and being less than or equal to the target evaporation temperature to a state of being greater than the target evaporation temperature and being less than or equal to the second evaporation temperature threshold, the controller can be regarded as controlling the outdoor unit fan to be increased by one gear at the moment, namely, the rotation speed of the outdoor unit fan can be increased from the first rotation speed to the second rotation speed for operation.
In addition, in this embodiment, the actual evaporation temperature, the target evaporation temperature, the first evaporation temperature threshold value and the second evaporation temperature threshold value are compared in such a manner that the actual evaporation temperature is compared with the first evaporation temperature threshold value, the actual evaporation temperature is compared with the second evaporation temperature threshold value when the actual evaporation temperature is greater than the first evaporation temperature threshold value, and the actual evaporation temperature is compared with the second evaporation temperature threshold value when the actual evaporation temperature is greater than the target evaporation temperature. It should be understood that in other embodiments, the actual evaporating temperature may be compared with the second evaporating temperature threshold, and the actual evaporating temperature may be compared with the target evaporating temperature when the actual evaporating temperature is not greater than the second evaporating temperature, and the actual evaporating temperature may be compared with the first evaporating temperature threshold when the actual evaporating temperature is not greater than the target evaporating temperature.
Further, before step S10, the fan speed control method further includes:
and step S01, comparing the actual condensation temperature with the target condensation temperature.
In the present embodiment, the actual condensing temperature is measured by the indoor tube temperature sensor and sent to the controller. Alternatively, the target condensing temperature is set manually. It should be understood that in other embodiments, the setting of the target condensation temperature can also be performed in the manner of setting the target evaporation temperature as in step S11-step S12 of step S10, and will not be described herein.
Optionally, the comparing step S01 includes:
and step S011, calculating a first condensation temperature threshold value and a second condensation temperature threshold value according to the target condensation temperature.
Wherein the first condensing temperature threshold is less than the second condensing temperature threshold. Can be through calculating out first condensing temperature threshold value and second condensing temperature threshold value according to target condensing temperature, can form an interval scope through first condensing temperature threshold value and second condensing temperature threshold value jointly, and then can compare this interval scope with actual condensing temperature, can improve the precision of carrying out control through actual condensing temperature.
Alternatively, referring to fig. 1 and fig. 6 in combination, step S011 includes:
and S0111, calculating the target condensing temperature and subtracting a fourth calculation coefficient to obtain a first condensing temperature threshold value.
Optionally, the fourth calculation coefficient is a value set manually.
And step S0112, calculating the target condensing temperature and adding a fifth calculation coefficient to obtain a second condensing temperature threshold.
Optionally, the fifth calculation coefficient is a value set manually.
In this embodiment, the fourth calculation coefficient and the fifth calculation coefficient are equal to each other. It should be understood that in other embodiments, the fourth calculation coefficient and the fifth calculation coefficient may not be equal to each other. In addition, step S0111 and step S0112 can be interchanged in order.
Optionally, in this embodiment, the target condensing temperature is 52 degrees celsius, the first condensing temperature threshold is 50 degrees celsius, and the second condensing temperature threshold is 54 degrees celsius, that is, the fourth calculation coefficient and the fifth calculation coefficient both have a value of 2.
Step S02, step S10 is executed according to the comparison result of the actual condensing temperature and the target condensing temperature.
It should be noted that the step S10 executed according to the comparison result between the actual condensation temperature and the target condensation temperature indicates that when the comparison result between the actual condensation temperature and the target condensation temperature is the designated result, the step S10 is executed. The comparison result of the actual condensation temperature and the target condensation temperature refers to a judgment result of judging whether the actual condensation temperature is within an interval range determined according to the target temperature. That is, step S02 may be regarded as determining whether the actual condensing temperature is within the range determined according to the target temperature. When the determination result is yes, the controller starts to execute step S10.
Optionally, after the execution of step S0112 is completed, step S02 includes:
step S021, executing step S10 according to the determination results of the actual condensing temperature, the first condensing temperature threshold and the second condensing temperature threshold.
Alternatively, referring to fig. 1 and fig. 7 in combination, step S021 includes:
and S0211, obtaining a third condensing temperature threshold according to the first condensing temperature threshold and the first correction coefficient.
And S0212, subtracting the second correction coefficient according to the second condensation temperature threshold to obtain a fourth condensation temperature threshold.
Optionally, in this embodiment, the values of the first correction coefficient and the second correction coefficient are both 1. It should be understood that the first correction coefficient and the second correction coefficient should be smaller than the sum of the fourth calculation coefficient and the fifth calculation coefficient. So as to avoid the situation that the actual evaporation temperature can not reach the limit interval of the first condensation temperature threshold and the second condensation temperature threshold after the correction of the first correction coefficient and the second correction coefficient.
Step S0213, when the actual condensing temperature increases from being less than the first condensing temperature threshold to being greater than or equal to the third condensing temperature threshold, or when the actual condensing temperature decreases from being greater than the second condensing temperature threshold to being less than or equal to the fourth condensing temperature threshold, executing step 10.
The situation that the controller collapses due to frequent control switching when the actual condensation temperature swings left and right at the first condensation temperature threshold value or the second condensation temperature threshold value is avoided by setting the first correction coefficient and the second correction coefficient.
In addition, when the actual condensation temperature is changed from the state of being greater than or equal to the first condensation temperature threshold and being less than or equal to the second condensation temperature threshold to be less than the first condensation temperature threshold, the controller directly controls the outdoor unit fan to stop rotating, namely the outdoor unit fan is controlled to stop. When the actual condensing temperature is changed from the state that the actual condensing temperature is greater than or equal to the first condensing temperature threshold and less than or equal to the second condensing temperature threshold to be greater than the second condensing temperature threshold, the controller directly controls the outdoor unit fan to operate at the highest rotating speed.
In this embodiment, when the actual condensing temperature is increased from a state lower than the first condensing temperature threshold to a state greater than or equal to the first condensing temperature and less than the third condensing temperature threshold, the controller is still in a state of directly controlling the outdoor unit fan to perform the highest rotation speed operation; when the actual condensation temperature is increased to a state which is larger than the third condensation temperature threshold and smaller than the fourth condensation temperature threshold from a state which is smaller than the first condensation temperature threshold, the controller stops the direct forced control on the outdoor unit fan at the moment, and controls the rotating speed of the outdoor unit fan through the steps S10-S30; similarly, when the actual condensing temperature is reduced to be greater than the fourth condensing temperature threshold and less than or equal to the second condensing temperature threshold from the state of being higher than the second condensing temperature threshold, the controller is still in the state of directly controlling the outdoor unit fan to stop at the moment; when the actual condensing temperature is decreased from the state of being greater than the second condensing temperature threshold to the state of being less than or equal to the fourth condensing temperature threshold, the controller stops the direct forced control of the outdoor unit fan at this time, and controls the rotation speed of the outdoor unit fan through steps S10 to S30. In addition, when the actual condensing temperature is changed from the state of being greater than or equal to the third condensing temperature threshold and less than or equal to the fourth condensing temperature threshold to the state of being greater than or equal to the first condensing temperature threshold and less than the third condensing temperature threshold, or to the state of being less than or equal to the second condensing temperature threshold and greater than the fourth condensing temperature threshold, the controller still controls the rotation speed of the outdoor unit fan through the steps S10-S30, and when the actual condensing temperature is changed from the state of being greater than or equal to the first condensing temperature threshold and less than or equal to the second condensing temperature threshold to the state of being less than the first condensing temperature threshold, or is changed to the state of being greater than the second condensing temperature threshold, the controller deduces the state of controlling the rotation speed of the outdoor unit fan through the steps S10-S30, and directly and forcibly controlling the outdoor unit fan to operate at the highest rotating speed or stopping the operation of the outdoor unit fan.
That is, the adjustment priority of the outdoor unit fan by the actual condensing temperature is greater than the adjustment priority of the actual evaporating temperature.
In summary, the fan speed regulation control method provided in this embodiment can set different target evaporation temperatures according to different external environment temperatures, so as to generate adaptive target evaporation temperatures under different external environment temperature conditions, and control the rotation speed of the outdoor unit fan according to the adaptive target evaporation temperature and the actual evaporation temperature, thereby improving the heat exchange efficiency of the outdoor heat exchanger and the external environment at different actual evaporation temperatures, and further improving the heating efficiency. The outdoor unit fan can be regulated according to different target evaporation temperatures under different external environment temperatures, the purpose of good regulation effect under different external environment temperatures can be achieved, and the system controllability is improved.
In addition, the embodiment further provides a fan speed regulation control device, and the fan speed regulation control device can improve the heating effect, ensure that the fan speed regulation control device has a good regulation effect under the conditions of different external environment temperatures, and improve the system controllability. The fan speed regulation control device comprises a calculation module, a comparison module and a control module. The calculation module is used for calculating the target evaporation temperature according to the outer annular temperature. The comparison module is used for comparing the target evaporation temperature with the actual evaporation temperature. The control module is used for controlling the rotating speed of the outdoor unit fan according to the comparison result of the target evaporation temperature and the actual evaporation temperature.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (11)

1. A fan speed regulation control method is applied to the rotation speed regulation of an outdoor unit fan under the heating mode of an air conditioner and is characterized by comprising the following steps:
calculating a target evaporation temperature according to the outer ring temperature;
comparing the target evaporation temperature with an actual evaporation temperature, wherein the actual evaporation temperature represents a tube temperature of an outdoor heat exchanger;
controlling the rotating speed of the outdoor unit fan according to the comparison result of the target evaporation temperature and the actual evaporation temperature;
before the step of calculating the target evaporation temperature according to the outer ring temperature, the fan speed regulation control method further includes:
comparing an actual condensing temperature with a target condensing temperature, wherein the actual condensing temperature represents the tube temperature of the heat exchanger of the indoor unit;
and if the actual condensation temperature is within the interval range determined according to the target condensation temperature, executing the step of calculating the target evaporation temperature according to the outer ring temperature.
2. The fan speed control method according to claim 1, wherein the step of calculating the target evaporation temperature from the outer circumferential temperature comprises:
setting a first calculation coefficient according to the outer ring temperature;
and calculating the target evaporation temperature by subtracting the first calculation coefficient from the outer ring temperature.
3. The fan speed control method according to claim 2, wherein the step of setting a first calculation coefficient according to the outer ring temperature comprises:
comparing the outer ring temperature with a first preset temperature;
when the outer ring temperature is less than or equal to the first preset temperature, setting a first set value as the first calculation coefficient;
when the outer ring temperature is higher than the first preset temperature, comparing the outer ring temperature with a second preset temperature, wherein the first preset temperature is lower than the second preset temperature;
when the outer ring temperature is lower than the second preset temperature, setting a second set value as the first calculation coefficient;
when the outer ring temperature is greater than or equal to the second preset temperature, setting a third set value as the first calculation coefficient;
the first set value, the second set value, and the third set value are not all equal.
4. The fan speed control method of claim 3, wherein the first set point is less than the second set point, and the second set point is less than the third set point.
5. The fan speed control method according to claim 1, wherein the step of comparing the target evaporation temperature and the actual evaporation temperature comprises:
calculating a first evaporation temperature threshold and a second evaporation temperature threshold according to the target evaporation temperature, wherein the first evaporation temperature threshold is smaller than the second evaporation temperature threshold;
the step of controlling the rotation speed of the outdoor unit fan according to the comparison result of the target evaporation temperature and the actual evaporation temperature includes:
and controlling the rotating speed of the outdoor unit fan according to the actual evaporation temperature, the target evaporation temperature, the first evaporation temperature threshold and the second evaporation temperature threshold.
6. The fan speed control method according to claim 5, wherein the step of calculating a first evaporating temperature threshold and a second evaporating temperature threshold based on the target evaporating temperature comprises:
calculating the target evaporation temperature minus a second calculation coefficient to obtain the first evaporation temperature threshold;
and calculating the target evaporation temperature and a third calculation coefficient to obtain the second evaporation temperature threshold value.
7. The fan speed control method according to claim 5, wherein the step of controlling the rotation speed of the outdoor unit fan according to the actual evaporating temperature, the target evaporating temperature, the first evaporating temperature threshold and the second evaporating temperature threshold comprises:
comparing the actual evaporating temperature to the first evaporating temperature threshold;
when the actual evaporation temperature is less than or equal to the first evaporation temperature threshold value, controlling the outdoor unit fan to operate at the highest rotating speed;
when the actual evaporation temperature is greater than the first evaporation temperature threshold, comparing the actual evaporation temperature with the second evaporation temperature threshold;
when the actual evaporation temperature is greater than the second evaporation temperature threshold value, controlling the outdoor unit fan to stop;
when the actual evaporating temperature is less than or equal to the second evaporating temperature threshold, comparing the actual evaporating temperature with the target evaporating temperature;
when the actual evaporation temperature is less than or equal to the target evaporation temperature, controlling the outdoor unit fan to operate at a first rotating speed;
when the actual evaporation temperature is higher than the target evaporation temperature, controlling the outdoor unit fan to operate at a second rotating speed;
the first rotating speed and the second rotating speed are both smaller than the highest rotating speed of the outdoor unit fan.
8. The fan speed regulation control method of claim 1, wherein the step of comparing the actual condensing temperature with the target condensing temperature comprises:
calculating a first condensing temperature threshold and a second condensing temperature threshold according to the target condensing temperature, wherein the first condensing temperature threshold is smaller than the second condensing temperature threshold;
if the actual condensing temperature is within the range determined according to the target condensing temperature, the step of performing the step of calculating the target evaporating temperature according to the outer ring temperature includes:
executing the step of calculating a target evaporation temperature from the outer loop temperature according to the actual condensation temperature, the first condensation temperature threshold and the second condensation temperature threshold.
9. The fan speed control method according to claim 8, wherein the step of calculating a first condensing temperature threshold and a second condensing temperature threshold according to the target condensing temperature comprises:
calculating the target condensing temperature minus a fourth calculation coefficient to obtain the first condensing temperature threshold;
and calculating the target condensation temperature and a fifth calculation coefficient to obtain the second condensation temperature threshold.
10. The fan speed control method according to claim 8, wherein the step of performing the step of calculating the target evaporation temperature from the outer loop temperature from the actual condensing temperature according to the actual condensing temperature, the first condensing temperature threshold and the second condensing temperature threshold comprises:
obtaining a third condensation temperature threshold value according to the first condensation temperature threshold value and the first correction coefficient;
subtracting the second correction coefficient according to the second condensation temperature threshold to obtain a fourth condensation temperature threshold;
when the actual condensation temperature is increased from being smaller than the first condensation temperature threshold to being greater than or equal to the third condensation temperature threshold, or when the actual condensation temperature is decreased from being greater than the second condensation temperature threshold to being smaller than or equal to the fourth condensation temperature threshold, executing the step of calculating the target evaporation temperature according to the outer loop temperature according to the actual condensation temperature.
11. An air conditioner comprising an outdoor heat exchanger, an outdoor fan disposed adjacent to the outdoor heat exchanger for guiding an air flow through the outdoor heat exchanger, and a controller for performing the fan speed control method according to any one of claims 1 to 10 and controlling a rotational speed of the outdoor fan.
CN201910728923.1A 2019-08-08 2019-08-08 Fan speed regulation control method and air conditioner Active CN110375423B (en)

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CN112797668A (en) * 2020-12-31 2021-05-14 青岛海尔空调电子有限公司 Water-cooled heat pump unit and control method thereof
CN113108433A (en) * 2021-03-23 2021-07-13 珠海格力电器股份有限公司 Control method of multi-split air conditioning system
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