CN112797601A - External fan control method and air conditioning system - Google Patents
External fan control method and air conditioning system Download PDFInfo
- Publication number
- CN112797601A CN112797601A CN202011614575.4A CN202011614575A CN112797601A CN 112797601 A CN112797601 A CN 112797601A CN 202011614575 A CN202011614575 A CN 202011614575A CN 112797601 A CN112797601 A CN 112797601A
- Authority
- CN
- China
- Prior art keywords
- outer fan
- rotating speed
- rotation speed
- control method
- target
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the application provides an external fan control method and an air conditioning system, and relates to the technical field of air conditioners. The method for controlling the outer fan calculates the target rotating speed according to the reference factors including the outdoor temperature, and then controls the outer fan to adjust according to the target rotating speed. The air conditioning system provided by the embodiment of the application can realize the external fan control method, so that the beneficial effects are also achieved.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to an external fan control method and an air conditioning system.
Background
The outer fan is an important part of the air conditioning system, the rotating speed of the outer fan directly influences the air volume of the heat exchanger, the operation parameters of the air conditioning system can be adjusted, and the key effect is achieved on the stable operation of the air conditioner.
At present, the rotating speed of the external fan is controlled by adopting a grading method, namely, different wind gears are divided for the external fan, the external fan corresponds to different rotating speeds, and after the air conditioner is started, the external fan can only operate according to a preset fixed rotating speed or switch between adjacent wind gears, so that the control of the external fan is not flexible enough. This is likely to cause a mismatch between the external fan speed and the load demand of the air conditioner.
Disclosure of Invention
The problem that this application will be solved is that the rotational speed control of air conditioner outer fan is not nimble enough in the current correlation technique, can not satisfy the problem of the load demand of air conditioner better.
In order to solve the above problem, in a first aspect, the present invention provides an external blower control method, which is applied to an air conditioning system, and includes:
calculating a target rotating speed Fn of the outer fan according to reference factors, wherein the reference factors comprise outdoor temperature Ta, and the target rotating speed Fn and the outdoor temperature Ta are in a linear relation;
and adjusting the rotating speed of the outer fan according to the target rotating speed Fn.
In the embodiment of the application, the target rotating speed is calculated according to reference factors including the outdoor temperature, and then the outer fan is controlled to adjust according to the target rotating speed.
In an alternative embodiment, the method for controlling the outer fan further comprises determining a minimum rotation speed Fmin and a maximum rotation speed Fmax of the outer fan, the rotation speed of the outer fan being adjusted within the rotation speed interval [ Fmin, Fmax ]. Through setting the rotating speed interval, the rotating speed of the outer fan is adjusted in the rotating speed interval [ Fmin, Fmax ], so that the rotating speed of the outer fan is not too high or too low, and the safety of the outer fan is favorably ensured.
In an alternative embodiment, the target rotational speed Fn is Fmin + Ft, where Ft is an adjustment value, where the adjustment value Ft includes at least a first adjustment value Fta, and the first adjustment value Fta is determined by:
determining a reference temperature interval [ T1, T2 ];
the first adjustment value Fta is determined as (Fmax-Fmin) × (Ts/(T2-T1), in the heating mode as T2-Ta and in the cooling mode as Ta-T1.
In the present embodiment, the target rotation speed of the external fan is calculated by the formulas Fn ═ Fmin + Ft and Fta ═ Fmax-Fmin) × (T2-T1), so that the target rotation speed and the outdoor temperature are in a linear relationship. Through rationally setting up reference temperature interval and rotational speed interval, can make the target rotational speed of fan can satisfy the load demand of air conditioner well: when heating, the outdoor heat exchanger absorbs heat, and the higher the outdoor temperature is, the easier the heat absorption is, so that the requirement on the rotating speed of the external fan is reduced, and the rotating speed of the external fan is reduced, thereby having the energy-saving effect; during refrigeration, the outdoor heat exchanger releases heat, the higher the outdoor temperature is, the more difficult the heat release is, and therefore, the requirement on the rotating speed of the external fan is higher. Therefore, the above-described manner of determining the target rotation speed of the present embodiment is rational and easy to implement.
In an alternative embodiment, the step of determining the reference temperature interval [ T1, T2] comprises:
the end points of the temperature interval T1 and T2 are determined according to a preset base frequency M0 of the compressor.
Since the frequency of the compressor is related to the load of the air conditioner, that is, the required rotation speed of the external fan, in this embodiment, the reference temperature interval is determined by presetting the fundamental frequency of the compressor. Optionally, the fundamental frequency of the compressor is preset after starting and the reference temperature interval is determined.
In an alternative embodiment, the reference factor further includes a current frequency M of the compressor, and the adjustment value further includes a second adjustment value Ftb (M-M0), where K is a frequency correction factor.
In the embodiment, the current frequency of the compressor is taken as a reference factor and used for calculating a second adjustment value, and the second adjustment value and the first adjustment value are jointly used for calculating the target rotating speed of the outer fan. The higher the current frequency of the compressor, the greater the temperature regulation requirement of the air conditioning system, and therefore the higher the speed of the external fan. In this embodiment, because the current frequency of the compressor is added to the reference factor, a more reasonable target rotational speed can be obtained.
In an alternative embodiment, the reference factor further includes a return air pressure P of the compressor, and in the case where the return air pressure P is not within the preset pressure interval [ Pmin, Pmax ], the adjustment value Ft further includes a third adjustment value Ftc;
wherein, in the heating mode, Ftc is more than 0 when P is less than Pmin, and Ftc is less than 0 when P is more than Pmax; in the cooling mode, Ftc is less than 0 when P is less than Pmin, and Ftc is more than 0 when P is more than Pmax.
In the heating process, if the return air pressure is too small, the requirement on the rotating speed of the external fan is higher, and the rotating speed of the external fan is increased to return the return air pressure to a reasonable range; if the return air pressure is too large, the requirement on the rotating speed of the external fan is reduced, and the rotating speed is reduced to enable the return air pressure to be reduced to be within a reasonable range. The cooling mode is opposite to the heating mode. In the embodiment, the return air pressure is used as a reference factor, the third adjustment value is calculated, and then the target rotating speed is calculated, so that the target rotating speed is more reasonable.
In an optional embodiment, in the heating mode, if the return air pressure P is greater than Pmax and the target rotating speed Fn is less than Fmin, the external fan is controlled to stop running; and/or controlling the external fan to stop running if the return air pressure P is less than Pmin and the target rotating speed Fn is less than Fmin in the refrigeration mode. In the heating mode, under the condition that the return air pressure is overlarge, the rotating speed of the outer fan cannot be further reduced because the target rotating speed is lower than the minimum rotating speed, so that the outer fan is controlled to directly stop running, and the return air pressure of the compressor is prevented from being continuously increased. On the contrary, in the cooling mode, if the return air pressure P is too low, the rotation speed of the outer fan should be controlled to be reduced so that the return air pressure is increased to the normal range, but if the rotation speed of the outer fan is lower than the minimum rotation speed, the rotation speed of the outer fan cannot be further reduced, and therefore the outer fan is controlled to directly stop operating.
In an optional embodiment, the step of adjusting the rotation speed of the outer fan within the rotation speed interval [ Fmin, Fmax ] according to the target rotation speed Fn includes:
if the target rotating speed Fn is within the rotating speed interval [ Fmin, Fmax ], adjusting the rotating speed of the outer fan to the target rotating speed Fn;
if the target rotating speed Fn is larger than Fmax, adjusting the rotating speed of the outer fan to the maximum rotating speed Fmax;
and if the target rotating speed Fn is less than Fmin, adjusting the rotating speed of the outer fan to the minimum rotating speed Fmin.
Through the mode, the rotating speed of the outer fan can be controlled to rotate within a reasonable rotating speed interval all the time, and the fan is prevented from being damaged.
In an alternative embodiment, when the absolute value of the difference Δ F between the calculated target rotation speed Fn and the current rotation speed of the outer fan is not greater than the rotation speed tolerance value Fe, the outer fan is controlled to maintain the current rotation speed without adjustment. When the difference between the calculated target rotating speed and the current rotating speed is too small, rotating speed adjustment is not needed, so that the rotating speed of the outer fan can be prevented from being adjusted too frequently. Furthermore, the tolerance value Fe of the rotating speed is 0-10 r/min.
In an alternative embodiment, the target rotation speed Fn of the outer fan is recalculated every preset period, and the rotation speed of the outer fan is adjusted according to the target rotation speed Fn. Further, the preset period is 10 s-30 s. The target rotating speed is periodically calculated, and the rotating speed of the outer fan is adjusted, so that the rotating speed of the outer fan can be always kept to be matched with the current outdoor environment and air conditioner load.
In an optional embodiment, after the compressor is detected to be stopped, the external fan is controlled to stably operate at the current rotating speed for a preset time period and then stops operating. After the compressor stops, the air conditioner does not adjust the temperature any more, and at the moment, the outdoor heat exchanger stops after waste heat or cold air of the outdoor heat exchanger is blown away only by continuously operating the outer fan for a preset time.
In a second aspect, the present invention provides an air conditioning system comprising a controller for executing an executable program to implement the external fan control method of any one of the preceding embodiments. Based on the external fan control method, the air conditioning system provided by the embodiment of the application can control the external fan to flexibly adjust the rotating speed so as to meet the requirement of the air conditioner.
Drawings
FIG. 1 is a schematic view of an air conditioning system in an embodiment of the present application in a heating mode;
FIG. 2 is a control block diagram of an air conditioning system according to an embodiment of the present application;
FIG. 3 is a flow chart of an external fan control method according to an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating a relationship between a rotation speed of an outer fan and an outdoor temperature and a current frequency of a compressor in a heating mode according to an embodiment of the present disclosure;
FIG. 5 is a logic diagram illustrating the control of the rotational speed of the external fan according to an embodiment of the present application.
Description of reference numerals: 100-an air conditioning system; 110-a compressor; 112-return air pressure sensor; 120-indoor heat exchanger; 130-outdoor heat exchanger; 132-a temperature sensor; 140-an outer fan; 150-a throttle valve; 160-four-way reversing valve; 170-controller.
Detailed Description
In the prior art, an outer fan of an air conditioning system usually has a plurality of windshields, so that the rotation speed of the outer fan can be adjusted only by switching among fixed windshields, and the flexibility is poor. In addition, in the prior art, the outdoor temperature is not taken into the reference factor to adjust the rotating speed of the outer fan, so that the rotating speed of the outer fan cannot be well matched with the load requirement of the air conditioning system, and the problems of insufficient rotating speed or excessive rotating speed and high energy consumption can be caused.
Therefore, the embodiment of the present application provides an external fan control method and an air conditioning system, which calculate a target rotation speed of an external fan according to an outdoor temperature, and adjust the rotation speed of the external fan according to the target rotation speed, wherein the outdoor temperature is linearly related to the target rotation speed. In this way, the rotating speed of the outer fan is not divided into multiple stages any more, but can be linearly adjusted according to the outdoor temperature. Therefore, the control flexibility of the external fan is higher, and the requirement of an air conditioning system can be better met.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
FIG. 1 is a schematic view of an air conditioning system 100 in a heating mode according to an embodiment of the present application; fig. 2 is a control block diagram of the air conditioning system 100 according to an embodiment of the present application. As shown in fig. 1 and 2, an air conditioning system 100 according to an embodiment of the present invention includes a compressor 110, an indoor heat exchanger 120, an inner fan (not shown), an outdoor heat exchanger 130, an outer fan 140, a throttle valve 150, a four-way reversing valve 160, and a pipeline for flowing a refrigerant. The compressor 110 is configured to compress a low-pressure gas refrigerant into a high-pressure gas refrigerant; the indoor heat exchanger 120 is used for exchanging heat with indoor air; the outdoor heat exchanger 130 is used for exchanging heat with outdoor air; the outer fan 140 is used for accelerating the gas fluidity at the outdoor heat exchanger 130, thereby improving the heat exchange efficiency; the four-way reversing valve 160 is used for adjusting the flow direction of the refrigerant. In the present embodiment, the air conditioning system 100 further includes a temperature sensor 132 disposed outdoors (e.g., an outdoor unit) for detecting an outdoor temperature, which is an outdoor ambient temperature. The upstream end of the compressor 110 is also provided with a return air pressure sensor 112 for detecting a return air pressure. The embodiment of the present application further includes a controller 170, which is used for electrically connecting the controller 170 with the external fan 140, the compressor 110, the four-way reversing valve 160, the temperature sensor 132, and the return air pressure sensor 112, and the controller 170 is used for executing an executable program to control the external fan 140, the compressor 110, and the four-way reversing valve 160 to operate, and can receive temperature information, pressure information, and the like fed back by the temperature sensor 132 and the return air pressure sensor 112.
As shown in fig. 1, the arrows on the lines indicate the flow direction of the refrigerant in the heating mode, and it should be understood that when the air conditioning system 100 is in the cooling mode, the four-way reversing valve 160 switches the flow direction of the refrigerant in the lines except for the compressor 110.
FIG. 3 is a flow chart of an external fan control method according to an embodiment of the present application. As shown in fig. 3, an external fan control method provided in an embodiment of the present application includes:
and S100, calculating a target rotating speed Fn of the outer fan according to reference factors, wherein the reference factors comprise outdoor temperature Ta, and the target rotating speed Fn and the outdoor temperature Ta are in a linear relation.
Taking the air conditioning system 100 provided in the embodiment of the present application as an example, the controller 170 receives the outdoor temperature collected by the temperature sensor 132, and calculates the target rotation speed Fn of the external fan 140 by using the outdoor temperature as a reference factor, where the target rotation speed Fn is an important basis for adjusting the rotation speed of the external fan 140.
In this embodiment, the method for controlling the outer fan further includes determining a minimum rotation speed Fmin and a maximum rotation speed Fmax of the outer fan 140, and the rotation speed of the outer fan 140 is adjusted within the rotation speed interval [ Fmin, Fmax ]. By setting the rotating speed interval, the rotating speed of the outer fan 140 is adjusted in the rotating speed interval [ Fmin, Fmax ], so that the rotating speed of the outer fan 140 is not too high or too low, and the safety of the outer fan 140 is favorably ensured. The minimum rotating speed Fmin and the maximum rotating speed Fmax can be set according to the requirements of the air conditioning system 100, for example, the minimum rotating speed Fmin can be set to 100-300 r/min, and the maximum rotating speed Fmax can be set to 900-1200 r/min.
In this embodiment, the target rotation speed Fn is calculated by using Fn ═ Fmin + Ft, where Ft is an adjustment value, and the adjustment value is adjusted according to the content included in the reference factor. In the present embodiment, the reference factors include the current frequency of the compressor 110 and the return air pressure of the compressor 110 in addition to the outdoor temperature. In alternative embodiments, only the outdoor temperature may be used as the reference factor. The adjustment value Ft at least includes a first adjustment value Fta, and the first adjustment value Fta can be regarded as the influence of the outdoor temperature on the target rotation speed Fn of the external fan 140. In this embodiment, the adjustment value Ft further includes a second adjustment value Ftb and a third adjustment value Ftc, where the second adjustment value Ftb can be regarded as an influence of the current frequency of the compressor 110 on the target rotation speed Fn of the external fan 140, and the third adjustment value Ftc can be regarded as an influence of the return air pressure of the compressor 110 on the target rotation speed Fn of the external fan 140. The adjustment value Ft reflects the sum of the influences of the reference factors on the target rotation speed, that is, Ft is Fta + Ftb + Ftc, so that the target rotation speed Fn is Fmin + Fta + Ftb + Ftc, and it can be seen that the outdoor temperature, the current frequency of the compressor 110, and the return air pressure of the compressor 110 all have influences on the target rotation speed Fn of the external fan 140.
Wherein the first adjustment value Fta is determined by:
determining a reference temperature interval [ T1, T2 ];
the first adjustment value Fta is determined as (Fmax-Fmin) × (Ts/(T2-T1), in the heating mode as T2-Ta and in the cooling mode as Ta-T1.
In the above formula, the unit of the rotation speed is r/min, and the unit of the temperature is centigrade. In the present embodiment, the target rotation speed of the external fan 140 is calculated by the formulas Fn ═ Fmin + Ft and Fta ═ Fmax-Fmin) × (T2-T1), and the target rotation speed and the outdoor temperature are in a linear relationship. Through rationally setting up reference temperature interval and rotational speed interval, can make the target rotational speed of fan can satisfy the load demand of air conditioner well: during heating, the outdoor heat exchanger 130 absorbs heat, and the higher the outdoor temperature is, the easier the heat absorption is, so that the requirement on the rotating speed of the external fan 140 is reduced, and the energy-saving effect can be achieved by reducing the rotating speed of the external fan 140; in cooling, the outdoor heat exchanger 130 releases heat, and the higher the outdoor temperature, the more difficult the heat release, and thus the higher the demand for the rotation speed of the external fan 140. Therefore, the above-described manner of determining the target rotation speed of the present embodiment is reasonable and easy to implement.
In an alternative embodiment, the end values T1 and T2 of the temperature interval may be determined according to a preset fundamental frequency M0 of the compressor 110. Specifically, the fundamental frequency M0 of the compressor 110 may be preset after the compressor is turned on, and the reference temperature interval may be determined. Since the frequency of the compressor 110 is related to the load of the air conditioner, that is, the required rotation speed of the external fan 140, in this embodiment, the reference temperature interval is determined by presetting the fundamental frequency of the compressor 110. For example, the basic frequency of the heating mode is 70Hz, the rotating speed of the outer fan 140 is at the maximum 900r/min under the nominal working condition (for example, the outdoor temperature is 7 ℃), the outdoor temperature is increased, and the rotating speed of the outer fan is reduced to the minimum 200r/min when the outdoor temperature is increased to 20 ℃ under the condition that the pressure range is ensured, namely T1 is 7 ℃ and T2 is 20 ℃. Certainly, the fundamental frequency M0 in the heating mode and the cooling mode can also be adjusted within a range, for example, in the heating mode, the fundamental frequency M0 is 60-90 Hz; under the refrigeration mode, the basic frequency M0 is 50-80 Hz. The temperature interval can also be adjusted according to the corresponding fundamental frequency.
In this embodiment, the second adjustment value Ftb, Ftb ═ K (M-M0), where K is a frequency correction coefficient, which is a preset value. In this embodiment, the current frequency of the compressor 110 is taken as a reference factor, and is used to calculate the second adjustment value, and further used to calculate the target rotation speed of the outer fan 140. The higher the current frequency of the compressor 110 means the greater the temperature conditioning demand of the air conditioning system 100, and therefore the rotational speed of the outer fan 140 needs to be increased. In this embodiment, since the current frequency of the compressor 110 is added to the reference factor, a more reasonable target rotational speed can be obtained. Due to the relationship between the frequency (unit r/s) and the multiple (60 times) of the rotating speed (unit r/min), the optimal range of the correction coefficient K is 10-100, and specific values can be determined according to the size of the fan blade and the air volume. For example, when the fan blade is small (the air volume is small under the same rotating speed), K is more than 60, such as 80; when the fan blades are large (the air volume is large at the same rotating speed), K is less than 60, for example, 20, so that the air volume requirement of the outdoor unit is ensured.
Further, since the reference factor in the present embodiment further includes the return air pressure P of the compressor 110, in the case that the return air pressure P is not located in the preset pressure interval [ Pmin, Pmax ], the third adjustment value Ftc is determined as follows:
in the heating mode, when P is less than Pmin, Ftc is more than 0; when P is larger than Pmax, Ftc is smaller than 0;
in the refrigeration mode, when P is less than Pmin, Ftc is less than 0; when P > Pmax, Ftc > 0.
In the case where the return air pressure P is within the preset pressure interval [ Pmin, Pmax ], it means that the return air pressure is normal, and the rotation speed of the external air blower 140 does not need to be corrected according to the return air pressure, so the third adjustment value Ftc is 0.
In the heating process, if the return air pressure is too small, the requirement on the rotating speed of the outer fan 140 is higher, and the rotating speed of the outer fan 140 is increased to return the return air pressure to a reasonable range; if the return air pressure is too high, the requirement for the rotating speed of the external fan 140 is reduced, and the rotating speed is reduced to reduce the return air pressure to a reasonable range. The cooling mode is opposite to the heating mode. In the embodiment, the return air pressure is used as a reference factor, the third adjustment value is calculated, and then the target rotating speed is calculated, so that the target rotating speed is more reasonable.
Further, in the heating mode, if the return air pressure P is greater than Pmax and the target rotation speed Fn is less than Fmin, the operation of the external fan 140 is controlled to stop. It can be understood that, in the heating mode, if the return air pressure is too large, the rotation speed of the outer fan 140 needs to be reduced to reduce the return air pressure, so the third adjustment value Ftc is negative. However, if the rotation speed of the outer fan 140 cannot be further reduced because the target rotation speed Fn is lower than the minimum rotation speed Fmin, the outer fan 140 is controlled to directly stop operating, and the return air pressure of the compressor 110 is prevented from being continuously increased. On the contrary, in the cooling mode, if the return air pressure P is too small, the rotation speed of the outer fan 140 should be controlled to be reduced so that the return air pressure is increased to the normal range, but if the rotation speed of the outer fan 140 is lower than the minimum rotation speed, the rotation speed cannot be further reduced, and thus the outer fan 140 is controlled to directly stop operating.
And step S200, adjusting the rotating speed of the outer fan according to the target rotating speed Fn.
Taking the air conditioning system 100 provided in the embodiment of the present application as an example, after the controller 170 calculates the target rotation speed Fn of the outer fan 140, the rotation speed of the outer fan 140 is adjusted according to the target rotation speed Fn, in this embodiment, the rotation speed of the outer fan 140 is adjusted within the rotation speed interval [ Fmin, Fmax ]. The adjusting mode specifically comprises the following steps:
if the target rotating speed Fn is within the rotating speed interval [ Fmin, Fmax ], adjusting the rotating speed of the outer fan 140 to the target rotating speed Fn;
if the target rotating speed Fn is larger than Fmax, adjusting the rotating speed of the outer fan 140 to the maximum rotating speed Fmax;
and if the target rotating speed Fn is less than Fmin, adjusting the rotating speed of the outer fan 140 to the minimum rotating speed Fmin.
Through the mode, the rotating speed of the outer fan 140 can be controlled to rotate within a reasonable rotating speed interval all the time, and the fan is prevented from being damaged.
Fig. 4 is a schematic diagram illustrating a relationship between a rotation speed of the outer fan 140 and an outdoor temperature and a current frequency of the compressor 110 in a heating mode according to an embodiment of the present invention, as shown in fig. 4, the rotation speed of the outer fan 140 and the outdoor temperature are linearly related within a certain temperature range, and a slope is (Fmax-Fmin)/(T2-T1). The target rotation speed Fn of the outer fan 140 is also in a linear relationship with the outdoor temperature, and the slope is (Fmax-Fmin)/(T2-T1) and is not limited by the temperature range. After the frequency of the compressor 110 increases, the rotation speed of the outer fan 140 also increases, which is represented by the upward translation of the curve in fig. 4, but the rotation speed of the outer fan 140 is limited by the maximum rotation speed Fmax. After the frequency of the compressor 110 is decreased, the rotation speed of the outer fan 140 is also decreased, which is represented by the downward translation of the curve in fig. 4, but the rotation speed of the outer fan 140 is limited by the minimum rotation speed Fmin. It should be understood that, in the relationship between the fan speed and the outdoor temperature shown in fig. 4, the return air pressure is not shown as a reference factor, which means that the return air pressure P is within the preset pressure interval [ Pmin, Pmax ], and the third adjustment value Ftc is 0.
In an alternative embodiment, when the absolute value of the difference Δ F between the calculated target rotation speed Fn and the current rotation speed of the outer fan 140 is not greater than the rotation speed tolerance value Fe, the outer fan 140 is controlled to maintain the current rotation speed without adjustment. This can avoid adjusting the rotational speed of the outer fan 140 too frequently. Furthermore, the tolerance value Fe of the rotating speed is 0-10 r/min.
In an alternative embodiment, the target rotation speed Fn of the outer fan 140 is recalculated every preset period, and the rotation speed of the outer fan 140 is adjusted according to the target rotation speed Fn. Further, the preset period is 10 s-30 s. By periodically calculating the target rotational speed and adjusting the rotational speed of the outer fan 140, the rotational speed of the outer fan 140 can be always kept matched with the current outdoor environment and air conditioning load. It should be appreciated that the outdoor temperature, compressor 110 frequency should also be reacquired every preset period.
FIG. 5 is a logic diagram illustrating the control of the rotational speed of the outer fan 140 according to an embodiment of the present disclosure. As shown in fig. 5, after the compressor 110 is turned on, the compressor is controlled to operate at the basic frequency M0, and the reference temperature interval [ T1, T2] is determined according to the basic frequency M0. The rotation of the outer fan 140 is controlled, and the fan rotation speed during starting may be a preset fixed value, or may be calculated according to the method in step S100 in the embodiment of the present application. Then, the outdoor temperature Ta, the frequency M of the compressor 110, and the return air pressure P are obtained, and the target rotation speed Fn of the outer fan 140 is calculated. After the target rotation speed Fn is obtained through calculation, it is determined whether the return air pressure meets the adjustment condition, for example, in the heating mode, if the return air pressure P is higher than Pmax and the target rotation speed Fn is already smaller than Fmin, it means that the return air pressure does not meet the adjustment condition (in other cases, the foregoing may be referred to as the determination mode). And under the condition that the return air pressure does not meet the regulation condition, stopping the operation of the outer fan 140. And under the condition that the return air pressure meets the regulation condition, judging whether the absolute value of the difference value delta F between the target rotating speed Fn and the current rotating speed is larger than the rotating speed tolerance value Fe, if so, regulating the rotating speed of the outer fan 140 between the rotating speed intervals [ Fmin, Fmax ] according to the target rotating speed Fn, and if not, maintaining the rotating speed of the current fan unchanged. After the adjustment or the decision of no adjustment, the preset period duration is set, the outdoor temperature Ta, the frequency M of the compressor 110 and the return air pressure P are obtained again, the target rotation speed Fn of the outer fan 140 is calculated again, and the above steps are repeated, so that the actual rotation speed of the outer fan 140 can always match the requirement of the air conditioning system 100.
In an alternative embodiment, after the compressor 110 is detected to be stopped, the operation of the external air blower 140 is controlled to be stopped after the external air blower is stably operated at the current rotation speed for a preset time period. When the compressor 110 is stopped, it means that the air conditioning system 100 is no longer temperature-regulated, and at this time, the external fan 140 is only required to continue to operate for a preset time period, and the compressor is stopped after blowing away the waste heat or cold air of the outdoor heat exchanger 130. If the air conditioning system 100 is in the cooling mode, the outdoor heat exchanger 130 is in a hotter state than the outdoor temperature, so that the preheating of the outdoor heat exchanger 130 can be blown away by continuously operating the external fan 140 for a preset time period, so that the outdoor heat exchanger is cooled to the outdoor temperature as soon as possible; if the air conditioning system 100 is in the heating mode, the outdoor heat exchanger 130 is in a cooler state than the outdoor temperature, and therefore the external fan 140 continuously operates for a preset time period to blow away the cold air of the outdoor heat exchanger 130 (which is equivalent to blowing the cold air with "hot air"), so that the temperature of the outdoor heat exchanger 130 is raised to the outdoor temperature as soon as possible.
The controller 170 of the air conditioning system 100 provided in the embodiment of the present application executes the executable program to implement the external fan control method provided in the above-mentioned embodiment of the present application.
In summary, in the embodiment of the present application, the target rotation speed is calculated according to the reference factors including the outdoor temperature, and then the outer fan 140 is controlled to adjust according to the target rotation speed, because the target rotation speed and the outdoor temperature are in a linear relationship, the rotation speed of the outer fan 140 can also be adjusted linearly, which is more flexible than the adjustment between the existing multiple gears, and can better satisfy the load requirement of the air conditioner.
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 (14)
1. An external fan control method applied to an air conditioning system (100), the external fan control method comprising:
calculating a target rotation speed Fn of the outer fan (140) according to a reference factor, wherein the reference factor comprises an outdoor temperature Ta, and the target rotation speed Fn and the outdoor temperature Ta are in a linear relation;
adjusting the rotational speed of the outer fan (140) according to the target rotational speed Fn.
2. The outer fan control method according to claim 1, further comprising determining a minimum rotational speed Fmin and a maximum rotational speed Fmax of the outer fan (140), the rotational speed of the outer fan (140) being adjusted within a rotational speed interval [ Fmin, Fmax ].
3. The external fan control method according to claim 2, wherein the target rotation speed Fn is Fmin + Ft, where Ft is an adjustment value, and the adjustment value Ft at least includes a first adjustment value Fta, and the first adjustment value Fta is determined by:
determining a reference temperature interval [ T1, T2 ];
the first adjustment value Fta is determined as (Fmax-Fmin) × Ts/(T2-T1), in the heating mode as T2-Ta and in the cooling mode as Ta-T1.
4. The external fan control method according to claim 3, wherein the step of determining a reference temperature interval [ T1, T2] comprises:
the end points of the temperature interval, T1 and T2, are determined according to a preset base frequency M0 of the compressor (110).
5. The external fan control method according to claim 4, wherein the reference factor further includes a current frequency M of the compressor (110), and the adjustment value further includes a second adjustment value Ftb, Ftb ═ K (M-M0), where K is a frequency correction coefficient.
6. The external fan control method according to claim 3, characterized in that the reference factor further comprises a return air pressure P of the compressor (110), and in the case where the return air pressure P is not within a preset pressure interval [ Pmin, Pmax ], the adjustment value Ft further comprises a third adjustment value Ftc;
wherein, in the heating mode, Ftc is more than 0 when P is less than Pmin, and Ftc is less than 0 when P is more than Pmax; in the cooling mode, Ftc is less than 0 when P is less than Pmin, and Ftc is more than 0 when P is more than Pmax.
7. The external fan control method according to claim 6, wherein in the heating mode, if the return air pressure P > Pmax and the target rotation speed Fn < Fmin, the external fan (140) is controlled to stop operating;
and/or controlling the external fan (140) to stop running if the return air pressure P is less than Pmin and the target rotating speed Fn is less than Fmin in the cooling mode.
8. The outer fan control method according to any one of claims 2-6, wherein the step of adjusting the rotation speed of the outer fan (140) within a rotation speed interval [ Fmin, Fmax ] according to the target rotation speed Fn comprises:
if the target rotating speed Fn is within the rotating speed interval [ Fmin, Fmax ], adjusting the rotating speed of the outer fan (140) to the target rotating speed Fn;
if the target rotating speed Fn is larger than Fmax, adjusting the rotating speed of the outer fan (140) to the maximum rotating speed Fmax;
and if the target rotating speed Fn is less than Fmin, adjusting the rotating speed of the outer fan (140) to the minimum rotating speed Fmin.
9. The outer fan control method according to any one of claims 1 to 7, characterized in that, when the absolute value of the difference Δ F between the calculated target rotational speed Fn and the current rotational speed of the outer fan (140) is not greater than a rotational speed tolerance value Fe, the outer fan (140) is controlled to maintain the current rotational speed without adjustment.
10. The external fan control method according to claim 9, wherein the rotation speed tolerance value Fe is 0 to 10 r/min.
11. The outer fan control method according to any one of claims 1 to 7, wherein the target rotation speed Fn of the outer fan (140) is recalculated once every preset period, and the rotation speed of the outer fan (140) is adjusted according to the target rotation speed Fn.
12. The external fan control method according to claim 11, wherein the preset period is 10s to 30 s.
13. The outer fan control method according to any one of claims 1 to 7, wherein the outer fan (140) is controlled to be stably operated at the current rotation speed for a preset time period and then to be stopped when it is detected that the compressor (110) is stopped.
14. An air conditioning system comprising a controller (170), wherein the controller (170) is configured to execute an executable program to implement the external fan control method of any of claims 1-13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011614575.4A CN112797601A (en) | 2020-12-30 | 2020-12-30 | External fan control method and air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011614575.4A CN112797601A (en) | 2020-12-30 | 2020-12-30 | External fan control method and air conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112797601A true CN112797601A (en) | 2021-05-14 |
Family
ID=75804619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011614575.4A Pending CN112797601A (en) | 2020-12-30 | 2020-12-30 | External fan control method and air conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112797601A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113566394A (en) * | 2021-07-21 | 2021-10-29 | 珠海格力电器股份有限公司 | Temperature detection method, device, equipment and storage medium |
| CN114017907A (en) * | 2021-11-16 | 2022-02-08 | 无锡同方人工环境有限公司 | Control method of year-round refrigeration air-conditioning system |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5144812A (en) * | 1991-06-03 | 1992-09-08 | Carrier Corporation | Outdoor fan control for variable speed heat pump |
| KR20060066439A (en) * | 2004-12-13 | 2006-06-16 | 엘지전자 주식회사 | Outdoor fan control method of air conditioner |
| CN101893308A (en) * | 2010-07-08 | 2010-11-24 | 宁波奥克斯电气有限公司 | Method for controlling outdoor fan of air-conditioner |
| CN103574835A (en) * | 2012-07-31 | 2014-02-12 | 美的集团股份有限公司 | Method and device for controlling outdoor fan of air conditioner |
| CN105241006A (en) * | 2015-09-29 | 2016-01-13 | 海信（广东）空调有限公司 | Control method and device for variable-frequency air conditioner and variable-frequency air conditioner |
| CN105387571A (en) * | 2015-11-27 | 2016-03-09 | 广东美的制冷设备有限公司 | Cryogenic cooling control method and device and air conditioner |
| CN105571078A (en) * | 2016-01-26 | 2016-05-11 | 芜湖美智空调设备有限公司 | Fan rotating speed control method and device of outdoor unit of air conditioner |
| CN107036259A (en) * | 2017-06-07 | 2017-08-11 | 青岛海信电子设备股份有限公司 | A kind of air conditioner energy saving control method and energy-saving type air conditioner |
| CN109099556A (en) * | 2018-08-27 | 2018-12-28 | 海信（山东）空调有限公司 | Low temperature refrigeration of air conditioner control method and air conditioner |
| CN109387025A (en) * | 2018-09-28 | 2019-02-26 | 珠海格力电器股份有限公司 | A kind of refrigeration storage equipment and its control method, device and storage medium |
| CN109631246A (en) * | 2018-11-08 | 2019-04-16 | 青岛海尔空调器有限总公司 | The control method of the outside blower of air conditioner |
| CN110410944A (en) * | 2019-07-23 | 2019-11-05 | 宁波奥克斯电气股份有限公司 | A kind of compress control method of air conditioner, control device and air conditioner |
| CN110579002A (en) * | 2019-08-13 | 2019-12-17 | 上海朗绿建筑科技股份有限公司 | humidifier control method and system of air treatment unit |
| CN111156665A (en) * | 2018-11-08 | 2020-05-15 | 青岛海尔空调器有限总公司 | Control method of outdoor side fan of air conditioner |
| CN111397143A (en) * | 2020-04-16 | 2020-07-10 | 宁波奥克斯电气股份有限公司 | Control method and device for outdoor fan of air conditioner, air conditioner and storage medium |
-
2020
- 2020-12-30 CN CN202011614575.4A patent/CN112797601A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5144812A (en) * | 1991-06-03 | 1992-09-08 | Carrier Corporation | Outdoor fan control for variable speed heat pump |
| KR20060066439A (en) * | 2004-12-13 | 2006-06-16 | 엘지전자 주식회사 | Outdoor fan control method of air conditioner |
| CN101893308A (en) * | 2010-07-08 | 2010-11-24 | 宁波奥克斯电气有限公司 | Method for controlling outdoor fan of air-conditioner |
| CN103574835A (en) * | 2012-07-31 | 2014-02-12 | 美的集团股份有限公司 | Method and device for controlling outdoor fan of air conditioner |
| CN105241006A (en) * | 2015-09-29 | 2016-01-13 | 海信（广东）空调有限公司 | Control method and device for variable-frequency air conditioner and variable-frequency air conditioner |
| CN105387571A (en) * | 2015-11-27 | 2016-03-09 | 广东美的制冷设备有限公司 | Cryogenic cooling control method and device and air conditioner |
| CN105571078A (en) * | 2016-01-26 | 2016-05-11 | 芜湖美智空调设备有限公司 | Fan rotating speed control method and device of outdoor unit of air conditioner |
| CN107036259A (en) * | 2017-06-07 | 2017-08-11 | 青岛海信电子设备股份有限公司 | A kind of air conditioner energy saving control method and energy-saving type air conditioner |
| CN109099556A (en) * | 2018-08-27 | 2018-12-28 | 海信（山东）空调有限公司 | Low temperature refrigeration of air conditioner control method and air conditioner |
| CN109387025A (en) * | 2018-09-28 | 2019-02-26 | 珠海格力电器股份有限公司 | A kind of refrigeration storage equipment and its control method, device and storage medium |
| CN109631246A (en) * | 2018-11-08 | 2019-04-16 | 青岛海尔空调器有限总公司 | The control method of the outside blower of air conditioner |
| CN111156665A (en) * | 2018-11-08 | 2020-05-15 | 青岛海尔空调器有限总公司 | Control method of outdoor side fan of air conditioner |
| CN110410944A (en) * | 2019-07-23 | 2019-11-05 | 宁波奥克斯电气股份有限公司 | A kind of compress control method of air conditioner, control device and air conditioner |
| CN110579002A (en) * | 2019-08-13 | 2019-12-17 | 上海朗绿建筑科技股份有限公司 | humidifier control method and system of air treatment unit |
| CN111397143A (en) * | 2020-04-16 | 2020-07-10 | 宁波奥克斯电气股份有限公司 | Control method and device for outdoor fan of air conditioner, air conditioner and storage medium |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113566394A (en) * | 2021-07-21 | 2021-10-29 | 珠海格力电器股份有限公司 | Temperature detection method, device, equipment and storage medium |
| CN113566394B (en) * | 2021-07-21 | 2022-07-12 | 珠海格力电器股份有限公司 | Temperature detection method, device, equipment and storage medium |
| CN114017907A (en) * | 2021-11-16 | 2022-02-08 | 无锡同方人工环境有限公司 | Control method of year-round refrigeration air-conditioning system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108375175B (en) | Air conditioner system control method and device | |
| CN101539151B (en) | Method and device for controlling inverter compressor | |
| CN101714847B (en) | Method for controlling air conditioning outdoor motor | |
| CN103075768B (en) | Thermostatic and humidistatic air conditioning unit group and control method | |
| US20170307248A1 (en) | Air-conditioning apparatus | |
| CN112797601A (en) | External fan control method and air conditioning system | |
| CN112880115B (en) | Control method of multi-unit air conditioning system | |
| CN102538132B (en) | Air conditioner intelligent control method with auxiliary electric heating function | |
| CN103154621B (en) | Air conditioner | |
| CN106765563A (en) | Air conditioner energy saving control method | |
| CN103994540B (en) | Vehicle air conditioning device | |
| CN106594988A (en) | Energy-saving control method for air conditioner | |
| CN107575998A (en) | The defrosting control method of air-conditioning and its outdoor unit | |
| CN113091267A (en) | Control method of air conditioner | |
| CN114294789A (en) | Control method of air conditioning system, air conditioning system and air conditioner | |
| JP2010236816A (en) | Heat pump type air conditioner and method of controlling heat pump type air conditioner | |
| CN110553369B (en) | Multi-fan cooling tower control method, cooling tower and air conditioner | |
| CN111998446A (en) | Airplane ground air conditioning unit and cold quantity control method thereof | |
| JP5768151B2 (en) | Heat pump type air conditioner and control method of heat pump type air conditioner | |
| JP4594146B2 (en) | Optimum control method for variable air volume of air conditioning system | |
| JPH0763392A (en) | Controller for air conditioner | |
| KR200435992Y1 (en) | Apparatus for controlling energy reduction type air conditioner which PID condensation pressure control is applied | |
| CN114893870B (en) | Predictive control method for natural cooling system operation mode | |
| WO2023190302A1 (en) | Air conditioner | |
| JP2009236452A (en) | Temperature adjusting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210514 |