CN107940691B - Control method and device of air conditioning system and air conditioner - Google Patents
Control method and device of air conditioning system and air conditioner Download PDFInfo
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- CN107940691B CN107940691B CN201711072243.6A CN201711072243A CN107940691B CN 107940691 B CN107940691 B CN 107940691B CN 201711072243 A CN201711072243 A CN 201711072243A CN 107940691 B CN107940691 B CN 107940691B
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention provides a control method and a control device of an air conditioning system and an air conditioner, wherein the control method of the air conditioning system comprises the following steps: detecting the outdoor environment temperature, the outlet refrigerant pressure of the outdoor condenser and the outlet air temperature of the outdoor condenser in real time; controlling the fan to operate for a first preset time at a preset gear; obtaining a corresponding saturation temperature according to the pressure of the refrigerant at the outlet of the outdoor condenser, and calculating a wind side coefficient; controlling the running gear of the fan and the opening of the throttling device according to the preset interval of the wind side coefficient; the preset gear is an initial gear corresponding to the outdoor environment temperature when the air conditioning system is started. According to the invention, the operation gear of the fan and the opening degree of the throttling device are reasonably optimized according to the preset interval in which the wind side coefficient is positioned, the air conditioning system is always in the optimal refrigerant circulation amount by controlling the opening degree of the throttling device, and the operation of the fan is always in the optimal state by adjusting the operation gear of the fan, so that the heat exchange efficiency and the reliability of the unit are improved.
Description
Technical Field
The invention relates to the technical field of control of air conditioning systems, in particular to a control method and device of an air conditioning system and an air conditioner.
Background
With the improvement of living standard of people, the air conditioner has been moved to general families and is more and more widely applied, however, in recent years, due to the energy shortage and the requirement of national policy, the requirement of people on the energy conservation of the air conditioning system is higher and higher. The fan operation mode of the existing air conditioning system cannot be adjusted according to the operation characteristics of the unit, the air conditioning system cannot be in a high-efficiency operation state all the time, the heat transfer efficiency of the heat exchanger cannot be effectively exerted, the actual operation effect of the unit is further influenced, the dual requirements of energy development and market development cannot be met, and the high-efficiency heat transfer technology needs to be further developed and utilized.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the present invention is to provide a control method of an air conditioning system.
A second aspect of the present invention is to provide a control apparatus for an air conditioning system.
A third aspect of the present invention is to provide an air conditioner.
In view of the above, according to a first aspect of the present invention, a method for controlling an air conditioning system is provided, the air conditioning system includes an outdoor unit, the outdoor unit includes an outdoor unit ambient temperature sensor, an outdoor condenser outlet air temperature sensor, an outdoor condenser refrigerant pressure sensor, a fan, and a throttling device, the method includes: detecting the outdoor environment temperature, the outlet refrigerant pressure of the outdoor condenser and the outlet air temperature of the outdoor condenser in real time; controlling the fan to operate for a first preset time at a preset gear; obtaining a corresponding saturation temperature according to the pressure of the refrigerant at the outlet of the outdoor condenser, and calculating a wind side coefficient; controlling the running gear of the fan and the opening of the throttling device according to the preset interval of the wind side coefficient; the preset gear is an initial gear corresponding to the outdoor environment temperature when the air conditioning system is started.
The control method of the air conditioning system provided by the invention comprises the steps of detecting the outdoor environment temperature, the outdoor condenser air outlet temperature and the outdoor condenser outlet refrigerant pressure in real time through an outdoor unit environment temperature sensor, an outdoor condenser air outlet temperature sensor and an outdoor condenser refrigerant pressure sensor, monitoring the change condition, selecting an initial gear according to the outdoor environment temperature, operating for a first preset time (for example, operating for 20s) at the initial gear, obtaining the corresponding saturation temperature according to the outdoor condenser outlet refrigerant pressure, calculating the current wind side coefficient, determining the preset interval where the wind side coefficient is located, and reasonably optimizing the operating gear of a fan and the opening degree of a throttling device according to the preset interval where the wind side coefficient is located. The invention controls the opening of the throttle device, namely the electronic expansion valve, to ensure that the air conditioning system is always in the best refrigerant circulation quantity, and the running of the fan is always in the best state by adjusting the running gear of the fan, thereby improving the heat exchange efficiency and reliability of the unit and ensuring that the air conditioner runs in a more efficient and energy-saving mode.
The control method of the air conditioning system according to the present invention may further include the following technical features:
in the above technical solution, preferably, the preset interval includes: a first preset interval, a second preset interval and a third preset interval; the range of the first preset interval is greater than or equal to a and less than or equal to b, the range of the second preset interval is less than a, the range of the third preset interval is greater than b, and a and b are constants.
In the technical scheme, the preset interval is divided into a first preset interval, a second preset interval and a third preset interval, so that the operation gear of the fan and the opening degree of the throttling device are optimized according to the preset interval in which the wind side coefficient is located.
In any of the above technical solutions, preferably, whether the wind side coefficient is in a first preset interval is judged; when the wind side coefficient is in a first preset interval, controlling the fan to operate in a normal control logic; and when the wind side coefficient is not in the first preset interval, controlling the running gear of the fan and the opening of the throttling device according to the preset interval in which the wind side coefficient is located.
In the technical scheme, when the wind side coefficient is in a first preset interval, the gear corresponding to the fan in the current operation environment is determined, the fan is controlled to operate under the corresponding gear, when the wind side coefficient is not in the first preset interval, the preset interval where the wind side coefficient is located needs to be further determined, the opening degree of the electronic expansion valve is controlled according to the preset interval where the wind side coefficient is located, the air conditioning system is enabled to be always in the optimal refrigerant circulation amount, the operation gear of the fan is adjusted, the operation of the fan is enabled to be always in the optimal state, the heat exchange efficiency and the reliability of the unit are improved, and the air conditioner is enabled to operate in a more efficient and energy-saving mode.
In any of the above technical solutions, preferably, whether the wind side coefficient is in a second preset interval is judged; when the wind side coefficient is in a second preset interval, further judging whether the running gear of the fan is the lowest gear of the fan; when the running gear of the fan is the lowest gear of the fan, controlling the throttling device to reduce a first preset opening degree, adjusting the opening degree of the throttling device according to a first preset frequency, and returning to continuously judge whether the wind side coefficient is in the first preset interval; and when the running gear of the fan is not the lowest gear of the fan, controlling the running gear of the fan to reduce the first preset gear, adjusting the running gear of the fan according to the second preset frequency, and returning to continuously judge whether the wind side coefficient is in the first preset interval.
In the technical scheme, when the wind side coefficient is judged to be in the second preset interval, whether the current running gear of the fan is the lowest gear of the fan is further judged, if the current running gear of the fan is the lowest gear, the electronic expansion valve is turned down by the first preset opening degree, and after the electronic expansion valve is turned down according to the first preset frequency, the electronic expansion valve is turned back to judge whether the wind side coefficient is in the first preset interval again, for example, after the current running gear of the fan is judged to be the lowest gear, the electronic expansion valve is turned down by 16P, and after the electronic expansion valve is operated for 2 minutes, the electronic expansion valve is turned back to judge whether the wind side coefficient is in the first preset interval. If the current running gear of the fan is not the lowest gear, reducing the current running gear of the fan by a first preset gear, returning to judge whether the wind side coefficient is in the first preset interval again after reducing the running gear of the fan according to a second preset frequency, for example, reducing the current running gear of the fan by one gear after judging that the current running gear of the fan is not the lowest gear, and returning to judge whether the wind side coefficient is in the first preset interval after running for 2 minutes. The air side coefficient is in a first preset interval by closing the electronic expansion valve or reducing the running gear of the fan, so that the air conditioning system is in the best refrigerant circulation amount and the fan is in the best state, the heat exchange efficiency and the reliability of the unit are improved, and the air conditioner runs in a more efficient and energy-saving mode.
In any of the above technical solutions, preferably, when the wind side coefficient is not in the second preset interval, the wind side coefficient is in the third preset interval, and whether the operating gear of the fan is the highest gear of the fan is further determined; when the running gear of the fan is the highest gear of the fan, controlling the throttle device to be opened by a second preset opening degree, adjusting the opening degree of the throttle device according to a third preset frequency, and returning to continuously judge whether the wind side coefficient is in a first preset interval; and when the running gear of the fan is not the highest gear, controlling the running gear of the fan to increase by a second preset gear, adjusting the running gear of the fan according to a fourth preset frequency, and returning to continuously judge whether the wind side coefficient is in a first preset interval.
In the technical scheme, if the wind side coefficient is not in a first preset interval and is not in a second preset interval, the wind side coefficient is certainly in a third preset interval according to division of the preset intervals, whether a current operation gear of the fan is the highest gear of the fan is further judged, if the current operation gear of the fan is the highest gear, the electronic expansion valve is opened by the second preset opening, and after the electronic expansion valve is opened by the third preset frequency, the electronic expansion valve is returned to judge whether the wind side coefficient is in the first preset interval again, for example, after the current operation gear of the fan is judged to be the highest gear, the electronic expansion valve is opened by 16P, and after the fan is operated for 2 minutes, the electronic expansion valve is returned to judge whether the wind side coefficient is in the first preset interval. If the current running gear of the fan is not the highest gear, the current running gear of the fan is increased by a second preset gear, and after the running gear of the fan is increased according to a fourth preset frequency, the judgment of whether the wind side coefficient is in a first preset interval is returned, for example, after the judgment that the current running gear of the fan is not the highest gear, the current running gear of the fan is increased by one gear, and after the fan runs for 2 minutes, the judgment of whether the wind side coefficient is in the first preset interval is returned. The air side coefficient is in a first preset interval by opening the electronic expansion valve or increasing the running gear of the fan, so that the air conditioning system is in the best refrigerant circulation amount and the fan is in the best state, the heat exchange efficiency and the reliability of the unit are improved, and the air conditioner runs in a more efficient and energy-saving mode.
In any of the above technical solutions, preferably, the calculation formula of the wind side coefficient is:
wherein n is a wind side coefficient, Tf is an outdoor condenser outlet air temperature, Th is an outdoor environment temperature, and Tb is a saturation temperature corresponding to the refrigerant pressure.
According to the technical scheme, the current wind side coefficient can be obtained through a wind side coefficient calculation formula according to the saturation temperature corresponding to the refrigerant pressure, the outlet air temperature of the outdoor condenser and the outdoor environment temperature, wherein the refrigerant pressure refers to the outlet pressure or the inlet pressure of the condenser or the exhaust pressure of the compressor, so that the running gear of the fan and the opening degree of the throttling device are controlled according to the preset interval where the wind side coefficient is located.
In a second aspect of the present invention, a control device for an air conditioning system is provided, the air conditioning system includes an outdoor unit, the outdoor unit includes an outdoor unit ambient temperature sensor, an outdoor condenser outlet air temperature sensor, an outdoor condenser refrigerant pressure sensor, a fan, and a throttling device, the control device for the air conditioning system includes: the detection unit is used for detecting the outdoor environment temperature, the refrigerant pressure at the outlet of the outdoor condenser and the air outlet temperature of the outdoor condenser in real time; the first control unit is used for controlling the fan to operate for a first preset time at a preset gear; the first calculation unit is used for obtaining the corresponding saturation temperature according to the pressure of the refrigerant at the outlet of the outdoor condenser; the second calculating unit is used for calculating the wind side coefficient; the second control unit is used for controlling the running gear of the fan and the opening of the throttling device according to the preset interval of the wind side coefficient; the preset gear is an initial gear corresponding to the outdoor environment temperature when the air conditioning system is started.
The control device of the air conditioning system provided by the invention detects the outdoor environment temperature, the outdoor condenser air outlet temperature and the outdoor condenser outlet refrigerant pressure in real time through the outdoor unit environment temperature sensor, the outdoor condenser air outlet temperature sensor and the outdoor condenser refrigerant pressure sensor, monitors the change condition, selects an initial gear according to the outdoor environment temperature, operates for a first preset time (for example, 20s) in the initial gear, obtains a corresponding saturation temperature according to the outdoor condenser outlet refrigerant pressure, calculates a current wind side coefficient, determines a preset interval where the wind side coefficient is located, and reasonably optimizes the operation gear of a fan and the opening degree of a throttling device according to the preset interval where the wind side coefficient is located. The invention controls the opening of the throttle device, namely the electronic expansion valve, to ensure that the air conditioning system is always in the best refrigerant circulation quantity, and the running of the fan is always in the best state by adjusting the running gear of the fan, thereby improving the heat exchange efficiency and reliability of the unit and ensuring that the air conditioner runs in a more efficient and energy-saving mode.
The control device of the air conditioning system according to the present invention may further include: the preset interval includes: a first preset interval, a second preset interval and a third preset interval; the range of the first preset interval is greater than or equal to a and less than or equal to b, the range of the second preset interval is less than a, the range of the third preset interval is greater than b, and a and b are constants.
In the technical scheme, the preset interval is divided into a first preset interval, a second preset interval and a third preset interval, so that the operation gear of the fan and the opening degree of the throttling device are optimized according to the preset interval in which the wind side coefficient is located.
In any one of the above technical solutions, preferably, the first determining unit is configured to determine whether the wind-side coefficient is in a first preset interval; the third control unit is used for controlling the fan to operate in a normal control logic when the wind side coefficient is in the first preset interval; and when the wind side coefficient is not in the first preset interval, controlling the running gear of the fan and the opening of the throttling device according to the preset interval in which the wind side coefficient is located.
In the technical scheme, when the wind side coefficient is in a first preset interval, the gear corresponding to the fan in the current operation environment is determined, the fan is controlled to operate under the corresponding gear, when the wind side coefficient is not in the first preset interval, the preset interval where the wind side coefficient is located needs to be further determined, the opening degree of the electronic expansion valve is controlled according to the preset interval where the wind side coefficient is located, the air conditioning system is enabled to be always in the optimal refrigerant circulation amount, the operation gear of the fan is adjusted, the operation of the fan is enabled to be always in the optimal state, the heat exchange efficiency and the reliability of the unit are improved, and the air conditioner is enabled to operate in a more efficient and energy-saving mode.
In the foregoing technical solution, preferably, the second determining unit is configured to determine whether the wind-side coefficient is in a second preset interval when the wind-side coefficient is not in the first preset interval; when the wind side coefficient is in a second preset interval, further judging whether the running gear of the fan is the lowest gear of the fan; the fourth control unit is used for controlling the throttling device to reduce the first preset opening degree when the running gear of the fan is the lowest gear of the fan, adjusting the opening degree of the throttling device according to the first preset frequency, and returning to continuously judge whether the wind side coefficient is in the first preset interval; and when the running gear of the fan is not the lowest gear of the fan, controlling the running gear of the fan to reduce the first preset gear, adjusting the running gear of the fan according to the second preset frequency, and returning to continuously judge whether the wind side coefficient is in the first preset interval.
In the technical scheme, when the wind side coefficient is judged to be in the second preset interval, whether the current running gear of the fan is the lowest gear of the fan is further judged, if the current running gear of the fan is the lowest gear, the electronic expansion valve is turned down by the first preset opening degree, and after the electronic expansion valve is turned down according to the first preset frequency, the electronic expansion valve is turned back to judge whether the wind side coefficient is in the first preset interval again, for example, after the current running gear of the fan is judged to be the lowest gear, the electronic expansion valve is turned down by 16P, and after the electronic expansion valve is operated for 2 minutes, the electronic expansion valve is turned back to judge whether the wind side coefficient is in the first preset interval. If the current running gear of the fan is not the lowest gear, reducing the current running gear of the fan by a first preset gear, returning to judge whether the wind side coefficient is in the first preset interval again after reducing the running gear of the fan according to a second preset frequency, for example, reducing the current running gear of the fan by one gear after judging that the current running gear of the fan is not the lowest gear, and returning to judge whether the wind side coefficient is in the first preset interval after running for 2 minutes. The air side coefficient is in a first preset interval by closing the electronic expansion valve or reducing the running gear of the fan, so that the air conditioning system is in the best refrigerant circulation amount and the fan is in the best state, the heat exchange efficiency and the reliability of the unit are improved, and the air conditioner runs in a more efficient and energy-saving mode.
In the above technical solution, preferably, the third determining unit is configured to, when the wind-side coefficient is not in the second preset interval, determine that the wind-side coefficient is in the third preset interval, and further determine whether the operating gear of the fan is the highest gear of the fan; the fifth control unit is used for controlling the throttle device to be opened by a second preset opening degree when the running gear of the fan is the highest gear of the fan, adjusting the opening degree of the throttle device according to a third preset frequency, and returning to continuously judge whether the wind side coefficient is in the first preset interval; and when the running gear of the fan is not the highest gear, controlling the running gear of the fan to increase by a second preset gear, adjusting the running gear of the fan according to a fourth preset frequency, and returning to continuously judge whether the wind side coefficient is in a first preset interval.
In the technical scheme, if the wind side coefficient is not in a first preset interval and is not in a second preset interval, the wind side coefficient is certainly in a third preset interval according to division of the preset intervals, whether a current operation gear of the fan is the highest gear of the fan is further judged, if the current operation gear of the fan is the highest gear, the electronic expansion valve is opened by the second preset opening, and after the electronic expansion valve is opened by the third preset frequency, the electronic expansion valve is returned to judge whether the wind side coefficient is in the first preset interval again, for example, after the current operation gear of the fan is judged to be the highest gear, the electronic expansion valve is opened by 16P, and after the fan is operated for 2 minutes, the electronic expansion valve is returned to judge whether the wind side coefficient is in the first preset interval. If the current running gear of the fan is not the highest gear, the current running gear of the fan is increased by a second preset gear, and after the running gear of the fan is increased according to a fourth preset frequency, the judgment of whether the wind side coefficient is in a first preset interval is returned, for example, after the judgment that the current running gear of the fan is not the highest gear, the current running gear of the fan is increased by one gear, and after the fan runs for 2 minutes, the judgment of whether the wind side coefficient is in the first preset interval is returned. The air side coefficient is in a first preset interval by opening the electronic expansion valve or increasing the running gear of the fan, so that the air conditioning system is in the best refrigerant circulation amount and the fan is in the best state, the heat exchange efficiency and the reliability of the unit are improved, and the air conditioner runs in a more efficient and energy-saving mode.
In the above technical solution, preferably, the calculation formula of the wind side coefficient is:
wherein n is a wind side coefficient, Tf is an outdoor condenser outlet air temperature, Th is an outdoor environment temperature, and Tb is a saturation temperature corresponding to the refrigerant pressure.
According to the technical scheme, the current wind side coefficient can be obtained through a wind side coefficient calculation formula according to the saturation temperature corresponding to the refrigerant pressure, the outlet pipeline temperature of the outdoor condenser and the outdoor environment temperature, wherein the refrigerant pressure refers to the outlet pressure or the inlet pressure of the condenser or the exhaust pressure of the compressor, and therefore the running gear of the fan and the opening degree of the throttling device are controlled according to the preset interval where the wind side coefficient is located.
In a third aspect of the present invention, an air conditioner is provided, including the control device of the air conditioning system in any of the above technical solutions.
The air conditioner according to the present invention includes the control device of the air conditioning system, and therefore has all the advantages of the control device of the air conditioning system, which are not described herein again.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart illustrating a control method of an air conditioning system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a control method of an air conditioning system according to another embodiment of the present invention;
fig. 3 is a flowchart illustrating a control method of an air conditioning system according to still another embodiment of the present invention;
fig. 4 is a flowchart illustrating a control method of an air conditioning system according to still another embodiment of the present invention;
fig. 5a shows a schematic block diagram of a control device of an air conditioning system according to an embodiment of the present invention;
fig. 5b shows a schematic block diagram of a control device of an air conditioning system according to another embodiment of the present invention;
fig. 5c shows a schematic block diagram of a control device of an air conditioning system according to still another embodiment of the present invention;
fig. 5d shows a schematic block diagram of a control device of an air conditioning system according to still another embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
In an embodiment of the first aspect of the present invention, a method for controlling an air conditioning system is provided, where the air conditioning system includes an outdoor unit, and the outdoor unit includes an outdoor unit ambient temperature sensor, an outdoor condenser outlet air temperature sensor, an outdoor condenser refrigerant pressure sensor, a fan, and a throttling device, fig. 1 shows a flowchart of a method for controlling an air conditioning system according to an embodiment of the present invention, and the method for controlling an air conditioning system includes:
104, controlling the fan to operate for a first preset time at a preset gear;
108, controlling the running gear of the fan and the opening of the throttling device according to the preset interval of the wind side coefficient;
the preset gear is an initial gear corresponding to the outdoor environment temperature when the air conditioning system is started.
The control method of the air conditioning system provided by the invention comprises the steps of detecting the outdoor environment temperature, the outdoor condenser air outlet temperature and the outdoor condenser outlet refrigerant pressure in real time through an outdoor unit environment temperature sensor, an outdoor condenser air outlet temperature sensor and an outdoor condenser refrigerant pressure sensor, monitoring the change condition, selecting an initial gear according to the outdoor environment temperature, operating for a first preset time (for example, operating for 20s) at the initial gear, obtaining the corresponding saturation temperature according to the outdoor condenser outlet refrigerant pressure, calculating the current wind side coefficient, determining the preset interval where the wind side coefficient is located, and reasonably optimizing the operating gear of a fan and the opening degree of a throttling device according to the preset interval where the wind side coefficient is located. The invention controls the opening of the throttle device, namely the electronic expansion valve, to ensure that the air conditioning system is always in the best refrigerant circulation quantity, and the running of the fan is always in the best state by adjusting the running gear of the fan, thereby improving the heat exchange efficiency and reliability of the unit and ensuring that the air conditioner runs in a more efficient and energy-saving mode.
In one embodiment of the present invention, preferably, the preset interval includes: a first preset interval, a second preset interval and a third preset interval; the range of the first preset interval is greater than or equal to a and less than or equal to b, the range of the second preset interval is less than a, the range of the third preset interval is greater than b, and a and b are constants.
In the embodiment, the preset interval is divided into a first preset interval, a second preset interval and a third preset interval, so that the operation gear of the fan and the opening degree of the throttling device are optimized according to the preset interval in which the wind side coefficient is located.
Fig. 2 is a flowchart illustrating a control method of an air conditioning system according to another embodiment of the present invention. The control method of the air conditioner control system comprises the following steps:
and 212, when the wind side coefficient is not in the first preset interval, controlling the running gear of the fan and the opening of the throttling device according to the preset interval in which the wind side coefficient is located.
In this embodiment, when the wind side coefficient is in the first preset interval, the gear corresponding to the fan in the current operating environment is determined, and the fan is controlled to operate in the corresponding gear, when the wind side coefficient is not in the first preset interval, the preset interval in which the wind side coefficient is located needs to be further determined, the opening of the electronic expansion valve is controlled according to the preset interval in which the wind side coefficient is located, so that the air conditioning system is always in the optimal refrigerant circulation amount, and the operating gear of the fan is adjusted, so that the operation of the fan is always in the optimal state, thereby improving the heat exchange efficiency and reliability of the unit, and enabling the air conditioner to operate in a more efficient and energy-saving manner.
Fig. 3 is a flowchart illustrating a control method of an air conditioning system according to still another embodiment of the present invention. The control method of the air conditioner control system comprises the following steps:
step 314, when the wind side coefficient is in a second preset interval, further judging whether the running gear of the fan is the lowest gear of the fan;
and 320, when the wind side coefficient is not in the second preset interval, controlling the running gear of the fan and the opening of the throttling device according to the preset interval in which the wind side coefficient is located.
In this embodiment, when it is determined that the wind-side coefficient is in the second preset range, it is further determined whether the current operating gear of the fan is the lowest gear of the fan, if the current operating gear of the fan is the lowest gear, the electronic expansion valve is turned down by the first preset opening degree, and after turning down the electronic expansion valve according to the first preset frequency, it returns to determine again whether the wind-side coefficient is in the first preset range, for example, after it is determined that the current operating gear of the fan is the lowest gear, the electronic expansion valve is turned down by 16P, and after operating for 2 minutes, it returns to determine whether the wind-side coefficient is in the first preset range. If the current running gear of the fan is not the lowest gear, reducing the current running gear of the fan by a first preset gear, returning to judge whether the wind side coefficient is in the first preset interval again after reducing the running gear of the fan according to a second preset frequency, for example, reducing the current running gear of the fan by one gear after judging that the current running gear of the fan is not the lowest gear, and returning to judge whether the wind side coefficient is in the first preset interval after running for 2 minutes. The air side coefficient is in a first preset interval by closing the electronic expansion valve or reducing the running gear of the fan, so that the air conditioning system is in the best refrigerant circulation amount and the fan is in the best state, the heat exchange efficiency and the reliability of the unit are improved, and the air conditioner runs in a more efficient and energy-saving mode.
Fig. 4 is a flowchart illustrating a control method of an air conditioning system according to still another embodiment of the present invention. The control method of the air conditioner control system comprises the following steps:
step 414, when the wind side coefficient is in a second preset interval, further judging whether the running gear of the fan is the lowest gear of the fan;
418, when the running gear of the fan is not the lowest gear of the fan, controlling the running gear of the fan to reduce the first preset gear, adjusting the running gear of the fan according to the second preset frequency, and returning to 408;
step 422, when the running gear of the fan is the highest gear of the fan, controlling the opening of the throttling device to be larger than a second preset opening, adjusting the opening of the throttling device according to a third preset frequency, and returning to the step 408;
In this embodiment, if the wind side coefficient is not in the first preset interval and is not in the second preset interval, according to the division of the preset intervals, the wind side coefficient is certainly in the third preset interval, whether the current operating gear of the fan is the highest gear of the fan is further determined, if the current operating gear of the fan is the highest gear, the electronic expansion valve is opened by the second preset opening, and after the electronic expansion valve is opened by the third preset frequency, the electronic expansion valve is returned to determine again whether the wind side coefficient is in the first preset interval, for example, after the current operating gear of the fan is determined to be the highest gear, the electronic expansion valve is opened by 16P, and after the fan is operated for 2 minutes, the electronic expansion valve is returned to determine whether the wind side coefficient is in the first preset interval. If the current running gear of the fan is not the highest gear, the current running gear of the fan is increased by a second preset gear, and after the running gear of the fan is increased according to a fourth preset frequency, the judgment of whether the wind side coefficient is in a first preset interval is returned, for example, after the judgment that the current running gear of the fan is not the highest gear, the current running gear of the fan is increased by one gear, and after the fan runs for 2 minutes, the judgment of whether the wind side coefficient is in the first preset interval is returned. The air side coefficient is in a first preset interval by opening the electronic expansion valve or increasing the running gear of the fan, so that the air conditioning system is in the best refrigerant circulation amount and the fan is in the best state, the heat exchange efficiency and the reliability of the unit are improved, and the air conditioner runs in a more efficient and energy-saving mode.
In one embodiment of the present invention, preferably, the wind side coefficient is calculated by the formula:
wherein n is a wind side coefficient, Tf is an outdoor condenser outlet air temperature, Th is an outdoor environment temperature, and Tb is a saturation temperature corresponding to the refrigerant pressure.
In this embodiment, according to the saturation temperature corresponding to the refrigerant pressure, the outlet air temperature of the outdoor condenser, and the outdoor environment temperature, where the refrigerant pressure refers to the outlet pressure or the inlet pressure of the condenser or the exhaust pressure of the compressor, the current air side coefficient may be obtained through an air side coefficient calculation formula, so as to control the operation gear of the fan and the opening degree of the throttling device according to the preset interval where the air side coefficient is located.
In an embodiment of the second aspect of the present invention, a control device for an air conditioning system is provided, the air conditioning system includes an outdoor unit, the outdoor unit includes an outdoor unit environment temperature sensor, an outdoor condenser outlet air temperature sensor, an outdoor condenser refrigerant pressure sensor, a fan, and a throttling device, and fig. 5a shows a schematic block diagram of a control device 500 for an air conditioning system according to an embodiment of the present invention. The control device 500 of the air conditioning system includes:
the detection unit 502 is used for detecting the outdoor environment temperature, the outdoor condenser outlet refrigerant pressure and the outdoor condenser outlet air temperature in real time;
a first control unit 504, configured to control the fan to operate at a preset gear for a first preset time;
a first calculating unit 506, configured to obtain a corresponding saturation temperature according to an outlet refrigerant pressure of the outdoor condenser;
a second calculation unit 508 for calculating a wind side coefficient;
the second control unit 510 is configured to control an operating gear of the fan and an opening degree of the throttling device according to a preset interval in which the wind side coefficient is located;
the preset gear is an initial gear corresponding to the outdoor environment temperature when the air conditioning system is started.
The control device of the air conditioning system provided by the invention detects the outdoor environment temperature, the outdoor condenser air outlet temperature and the outdoor condenser outlet refrigerant pressure in real time through the outdoor unit environment temperature sensor, the outdoor condenser air outlet temperature sensor and the outdoor condenser refrigerant pressure sensor, monitors the change condition, selects an initial gear according to the outdoor environment temperature, operates for a first preset time (for example, 20s) in the initial gear, obtains a corresponding saturation temperature according to the outdoor condenser outlet refrigerant pressure, calculates a current wind side coefficient, determines a preset interval where the wind side coefficient is located, and reasonably optimizes the operation gear of a fan and the opening degree of a throttling device according to the preset interval where the wind side coefficient is located. The invention controls the opening of the throttle device, namely the electronic expansion valve, to ensure that the air conditioning system is always in the best refrigerant circulation quantity, and the running of the fan is always in the best state by adjusting the running gear of the fan, thereby improving the heat exchange efficiency and reliability of the unit and ensuring that the air conditioner runs in a more efficient and energy-saving mode.
In one embodiment of the present invention, preferably, the preset interval includes: a first preset interval, a second preset interval and a third preset interval; the range of the first preset interval is greater than or equal to a and less than or equal to b, the range of the second preset interval is less than a, the range of the third preset interval is greater than b, and a and b are constants.
In the embodiment, the preset interval is divided into a first preset interval, a second preset interval and a third preset interval, so that the operation gear of the fan and the opening degree of the throttling device are optimized according to the preset interval in which the wind side coefficient is located.
Fig. 5b shows a schematic block diagram of a control device 500 of an air conditioning system according to another embodiment of the present invention. The control device 500 of the air conditioning system includes:
the detection unit 502 is used for detecting the outdoor environment temperature, the outdoor condenser outlet refrigerant pressure and the outdoor condenser outlet air temperature in real time;
a first control unit 504, configured to control the fan to operate at a preset gear for a first preset time;
a first calculating unit 506, configured to obtain a corresponding saturation temperature according to an outlet refrigerant pressure of the outdoor condenser;
a second calculation unit 508 for calculating a wind side coefficient;
the second control unit 510 is configured to control an operating gear of the fan and an opening degree of the throttling device according to a preset interval in which the wind side coefficient is located;
a first determining unit 512, configured to determine whether the wind side coefficient is in a first preset interval;
a third control unit 514, configured to control the fan to operate according to a normal control logic when the wind side coefficient is in the first preset interval; and
and when the wind side coefficient is not in the first preset interval, controlling the running gear of the fan and the opening of the throttling device according to the preset interval in which the wind side coefficient is located.
In this embodiment, when the wind side coefficient is in the first preset interval, the gear corresponding to the fan in the current operating environment is determined, and the fan is controlled to operate in the corresponding gear, when the wind side coefficient is not in the first preset interval, the preset interval in which the wind side coefficient is located needs to be further determined, the opening of the electronic expansion valve is controlled according to the preset interval in which the wind side coefficient is located, so that the air conditioning system is always in the optimal refrigerant circulation amount, and the operating gear of the fan is adjusted, so that the operation of the fan is always in the optimal state, thereby improving the heat exchange efficiency and reliability of the unit, and enabling the air conditioner to operate in a more efficient and energy-saving manner.
Fig. 5c shows a schematic block diagram of a control device 500 of an air conditioning system according to still another embodiment of the present invention. The control device 500 of the air conditioning system includes:
the detection unit 502 is used for detecting the outdoor environment temperature, the outdoor condenser outlet refrigerant pressure and the outdoor condenser outlet air temperature in real time;
a first control unit 504, configured to control the fan to operate at a preset gear for a first preset time;
a first calculating unit 506, configured to obtain a corresponding saturation temperature according to an outlet refrigerant pressure of the outdoor condenser;
a second calculation unit 508 for calculating a wind side coefficient;
the second control unit 510 is configured to control an operating gear of the fan and an opening degree of the throttling device according to a preset interval in which the wind side coefficient is located;
a first determining unit 512, configured to determine whether the wind side coefficient is in a first preset interval;
a third control unit 514, configured to control the fan to operate according to a normal control logic when the wind side coefficient is in the first preset interval; and
when the wind side coefficient is not in the first preset interval, controlling the running gear of the fan and the opening of the throttling device according to the preset interval in which the wind side coefficient is located;
a second determining unit 516, configured to determine whether the wind-side coefficient is in a second preset interval when the wind-side coefficient is not in the first preset interval; and
when the wind side coefficient is in a second preset interval, further judging whether the running gear of the fan is the lowest gear of the fan;
the fourth control unit 518 is configured to, when the operating gear of the fan is the lowest gear of the fan, control the throttling device to reduce the first preset opening, adjust the opening of the throttling device according to the first preset frequency, and then return to continuously determine whether the wind side coefficient is in the first preset interval; and
when the running gear of the fan is not the lowest gear of the fan, the running gear of the fan is controlled to be reduced by a first preset gear, and after the running gear of the fan is adjusted according to a second preset frequency, the operation is returned to continuously judge whether the wind side coefficient is in a first preset interval.
In this embodiment, when it is determined that the wind-side coefficient is in the second preset range, it is further determined whether the current operating gear of the fan is the lowest gear of the fan, if the current operating gear of the fan is the lowest gear, the electronic expansion valve is turned down by the first preset opening degree, and after turning down the electronic expansion valve according to the first preset frequency, it returns to determine again whether the wind-side coefficient is in the first preset range, for example, after it is determined that the current operating gear of the fan is the lowest gear, the electronic expansion valve is turned down by 16P, and after operating for 2 minutes, it returns to determine whether the wind-side coefficient is in the first preset range. If the current running gear of the fan is not the lowest gear, reducing the current running gear of the fan by a first preset gear, returning to judge whether the wind side coefficient is in the first preset interval again after reducing the running gear of the fan according to a second preset frequency, for example, reducing the current running gear of the fan by one gear after judging that the current running gear of the fan is not the lowest gear, and returning to judge whether the wind side coefficient is in the first preset interval after running for 2 minutes. The air side coefficient is in a first preset interval by closing the electronic expansion valve or reducing the running gear of the fan, so that the air conditioning system is in the best refrigerant circulation amount and the fan is in the best state, the heat exchange efficiency and the reliability of the unit are improved, and the air conditioner runs in a more efficient and energy-saving mode.
Fig. 5d shows a schematic block diagram of a control device 500 of an air conditioning system according to yet another embodiment of the present invention. The control device 500 of the air conditioning system includes:
the detection unit 502 is used for detecting the outdoor environment temperature, the outdoor condenser outlet refrigerant pressure and the outdoor condenser outlet air temperature in real time;
a first control unit 504, configured to control the fan to operate at a preset gear for a first preset time;
a first calculating unit 506, configured to obtain a corresponding saturation temperature according to an outlet refrigerant pressure of the outdoor condenser;
a second calculation unit 508 for calculating a wind side coefficient;
the second control unit 510 is configured to control an operating gear of the fan and an opening degree of the throttling device according to a preset interval in which the wind side coefficient is located;
a first determining unit 512, configured to determine whether the wind side coefficient is in a first preset interval;
a third control unit 514, configured to control the fan to operate according to a normal control logic when the wind side coefficient is in the first preset interval; and
when the wind side coefficient is not in the first preset interval, controlling the running gear of the fan and the opening of the throttling device according to the preset interval in which the wind side coefficient is located;
a second determining unit 516, configured to determine whether the wind-side coefficient is in a second preset interval when the wind-side coefficient is not in the first preset interval; and
when the wind side coefficient is in a second preset interval, further judging whether the running gear of the fan is the lowest gear of the fan;
the fourth control unit 518 is configured to, when the operating gear of the fan is the lowest gear of the fan, control the throttling device to reduce the first preset opening, adjust the opening of the throttling device according to the first preset frequency, and then return to continuously determine whether the wind side coefficient is in the first preset interval; and
when the running gear of the fan is not the lowest gear of the fan, controlling the running gear of the fan to reduce the first preset gear, adjusting the running gear of the fan according to the second preset frequency, and returning to continuously judge whether the wind side coefficient is in the first preset interval;
a third determining unit 520, configured to determine that the wind-side coefficient is in a third preset interval when the wind-side coefficient is not in the second preset interval, and further determine whether the operating gear of the fan is the highest gear of the fan;
the fifth control unit 522 is configured to, when the operating gear of the fan is the highest gear of the fan, control the throttle device to open by a second preset opening degree, adjust the opening degree of the throttle device according to a third preset frequency, and then return to continuously determine whether the wind side coefficient is in the first preset interval; and
and when the running gear of the fan is not the highest gear, controlling the running gear of the fan to increase by a second preset gear, adjusting the running gear of the fan according to a fourth preset frequency, and returning to continuously judge whether the wind side coefficient is in a first preset interval.
In this embodiment, if the wind side coefficient is not in the first preset interval and is not in the second preset interval, according to the division of the preset intervals, the wind side coefficient is certainly in the third preset interval, whether the current operating gear of the fan is the highest gear of the fan is further determined, if the current operating gear of the fan is the highest gear, the electronic expansion valve is opened by the second preset opening, and after the electronic expansion valve is opened by the third preset frequency, the electronic expansion valve is returned to determine again whether the wind side coefficient is in the first preset interval, for example, after the current operating gear of the fan is determined to be the highest gear, the electronic expansion valve is opened by 16P, and after the fan is operated for 2 minutes, the electronic expansion valve is returned to determine whether the wind side coefficient is in the first preset interval. If the current running gear of the fan is not the highest gear, the current running gear of the fan is increased by a second preset gear, and after the running gear of the fan is increased according to a fourth preset frequency, the judgment of whether the wind side coefficient is in a first preset interval is returned, for example, after the judgment that the current running gear of the fan is not the highest gear, the current running gear of the fan is increased by one gear, and after the fan runs for 2 minutes, the judgment of whether the wind side coefficient is in the first preset interval is returned. The air side coefficient is in a first preset interval by opening the electronic expansion valve or increasing the running gear of the fan, so that the air conditioning system is in the best refrigerant circulation amount and the fan is in the best state, the heat exchange efficiency and the reliability of the unit are improved, and the air conditioner runs in a more efficient and energy-saving mode.
In one embodiment of the present invention, preferably, the wind side coefficient is calculated by the formula:
wherein n is a wind side coefficient, Tf is an outdoor condenser outlet air temperature, Th is an outdoor environment temperature, and Tb is a saturation temperature corresponding to the refrigerant pressure.
In this embodiment, according to the saturation temperature corresponding to the refrigerant pressure, the outlet air temperature of the outdoor condenser, and the outdoor environment temperature, where the refrigerant pressure refers to the outlet pressure or the inlet pressure of the condenser or the exhaust pressure of the compressor, the current air side coefficient may be obtained through an air side coefficient calculation formula, so as to control the operation gear of the fan and the opening degree of the throttling device according to the preset interval where the air side coefficient is located.
In an embodiment of the third aspect of the present invention, an air conditioner is provided, which includes any one of the control devices of the air conditioning system.
The air conditioner according to the present invention includes the control device of the air conditioning system, and therefore has all the advantages of the control device of the air conditioning system, which are not described herein again.
The specific embodiment is as follows:
in a specific embodiment of the invention, the wind gear of the fan of the air conditioner is 1 gear, 2 gears, 3 gears, 4 gears and 5 gears from small to big in sequence. The working steps are as follows:
step 1: powering on the air conditioner, obtaining an initial wind level of 3 by the fan according to the outdoor environment temperature, and operating the fan at the 3 level for 20 seconds;
step 2: detecting the outdoor environment temperature, the outlet refrigerant pressure of the outdoor condenser and the outlet air temperature of the outdoor condenser in real time;
and step 3: obtaining a corresponding saturation temperature according to the pressure of the refrigerant at the outlet of the outdoor condenser, and calculating a current wind side coefficient by using a wind side coefficient calculation formula;
and 4, step 4: judging that the current wind side coefficient is in a second preset interval;
and 5: judging that the current running wind gear 3 of the fan is not the minimum wind gear;
step 6: reducing the wind gear of the fan by one gear, and operating at 2 gears for 2 minutes;
and 7: calculating a current wind side coefficient;
and 8: and judging that the current wind side coefficient is in a first preset interval, and controlling the fan to operate at a wind gear corresponding to the current outdoor environment temperature.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. The control method of the air conditioning system comprises an air conditioning outdoor unit, wherein the air conditioning outdoor unit comprises an outdoor unit environment temperature sensor, an outdoor condenser air outlet temperature sensor, an outdoor condenser refrigerant pressure sensor, a fan and a throttling device, and is characterized by comprising the following steps of:
detecting the outdoor environment temperature, the outlet refrigerant pressure of the outdoor condenser and the outlet air temperature of the outdoor condenser in real time;
controlling the fan to operate for a first preset time at a preset gear;
obtaining a corresponding saturation temperature according to the pressure of the refrigerant at the outlet of the outdoor condenser, and calculating a wind side coefficient;
controlling the running gear of the fan and the opening of the throttling device according to the preset interval of the wind side coefficient;
the preset gear is an initial gear corresponding to the outdoor environment temperature when the air conditioning system is started;
the calculation formula of the wind side coefficient is as follows:
and n is the air side coefficient, Tf is the air outlet temperature of the outdoor condenser, Th is the outdoor environment temperature, and Tb is the saturation temperature corresponding to the refrigerant pressure.
2. The control method of an air conditioning system according to claim 1,
the preset interval includes: a first preset interval, a second preset interval and a third preset interval;
the range of the first preset interval is greater than or equal to a and less than or equal to b, the range of the second preset interval is less than a, the range of the third preset interval is greater than b, and a and b are constants.
3. The method for controlling an air conditioning system according to claim 2, wherein the step of controlling an operation gear of the fan and an opening degree of the throttling device according to a preset interval in which the wind side coefficient is located specifically includes:
judging whether the wind side coefficient is in the first preset interval or not;
when the wind side coefficient is in the first preset interval, controlling the fan to operate in a normal control logic;
and when the wind side coefficient is not in the first preset interval, controlling the running gear of the fan and the opening of the throttling device according to the preset interval in which the wind side coefficient is.
4. The method according to claim 3, wherein the step of controlling the operating range of the fan and the opening degree of the throttling device according to the preset interval in which the wind side coefficient is located when the wind side coefficient is not in the first preset interval specifically comprises:
judging whether the wind side coefficient is in the second preset interval or not;
when the wind side coefficient is in the second preset interval, further judging whether the running gear of the fan is the lowest gear of the fan;
when the running gear of the fan is the lowest gear of the fan, controlling the throttling device to close by a first preset opening degree, adjusting the opening degree of the throttling device according to a first preset frequency, and returning to continuously judge whether the wind side coefficient is in the first preset interval; and
and when the running gear of the fan is not the lowest gear of the fan, controlling the running gear of the fan to reduce a first preset gear, adjusting the running gear of the fan according to a second preset frequency, and returning to continuously judge whether the wind side coefficient is in the first preset interval.
5. The control method of an air conditioning system according to claim 4, further comprising:
when the wind side coefficient is not in the second preset interval, the wind side coefficient is in a third preset interval, and whether the running gear of the fan is the highest gear of the fan is further judged;
when the running gear of the fan is the highest gear of the fan, controlling the throttle device to be opened by a second preset opening degree, adjusting the opening degree of the throttle device according to a third preset frequency, and returning to continuously judge whether the wind side coefficient is in the first preset interval; and
and when the running gear of the fan is not the highest gear, controlling the running gear of the fan to increase by a second preset gear, adjusting the running gear of the fan according to a fourth preset frequency, and returning to continuously judge whether the wind side coefficient is in the first preset interval.
6. The utility model provides an air conditioning system's controlling means, air conditioning system includes air condensing units, air condensing units includes off-premises station ambient temperature sensor, outdoor condenser air-out temperature sensor, outdoor condenser refrigerant pressure sensor, fan and throttling arrangement, its characterized in that, air conditioning system's controlling means includes:
the detection unit is used for detecting the outdoor environment temperature, the refrigerant pressure at the outlet of the outdoor condenser and the air outlet temperature of the outdoor condenser in real time;
the first control unit is used for controlling the fan to operate for a first preset time at a preset gear;
the first calculation unit is used for obtaining a corresponding saturation temperature according to the pressure of the refrigerant at the outlet of the outdoor condenser;
the second calculating unit is used for calculating the wind side coefficient;
the second control unit is used for controlling the running gear of the fan and the opening of the throttling device according to the preset interval where the wind side coefficient is located;
the preset gear is an initial gear corresponding to the outdoor environment temperature when the air conditioning system is started;
the calculation formula of the wind side coefficient is as follows:
and n is the air side coefficient, Tf is the air outlet temperature of the outdoor condenser, Th is the outdoor environment temperature, and Tb is the saturation temperature corresponding to the refrigerant pressure.
7. The control device of an air conditioning system according to claim 6,
the preset interval includes: a first preset interval, a second preset interval and a third preset interval;
the range of the first preset interval is greater than or equal to a and less than or equal to b, the range of the second preset interval is less than a, the range of the third preset interval is greater than b, and a and b are constants.
8. The control device of an air conditioning system according to claim 7, characterized by further comprising:
the first judging unit is used for judging whether the wind side coefficient is in the first preset interval or not;
the third control unit is used for controlling the fan to operate in a normal control logic when the wind side coefficient is in the first preset interval; and
and when the wind side coefficient is not in the first preset interval, controlling the running gear of the fan and the opening of the throttling device according to the preset interval in which the wind side coefficient is.
9. The control device of an air conditioning system according to claim 8, characterized by further comprising:
the second judging unit is used for judging whether the wind side coefficient is in the second preset interval or not when the wind side coefficient is not in the first preset interval; and
when the wind side coefficient is in the second preset interval, further judging whether the running gear of the fan is the lowest gear of the fan;
the fourth control unit is used for controlling the throttling device to reduce a first preset opening degree when the running gear of the fan is the lowest gear of the fan, adjusting the opening degree of the throttling device according to a first preset frequency, and returning to continuously judge whether the wind side coefficient is in the first preset interval; and
and when the running gear of the fan is not the lowest gear of the fan, controlling the running gear of the fan to reduce a first preset gear, adjusting the running gear of the fan according to a second preset frequency, and returning to continuously judge whether the wind side coefficient is in the first preset interval.
10. The control device of an air conditioning system according to claim 9, characterized by further comprising:
the third judging unit is used for judging whether the running gear of the fan is the highest gear of the fan or not when the wind side coefficient is not in the second preset interval and the wind side coefficient is in a third preset interval;
the fifth control unit is used for controlling the throttle device to be opened by a second preset opening degree when the running gear of the fan is the highest gear of the fan, adjusting the opening degree of the throttle device according to a third preset frequency, and returning to continuously judge whether the wind side coefficient is in the first preset interval; and
and when the running gear of the fan is not the highest gear, controlling the running gear of the fan to increase by a second preset gear, adjusting the running gear of the fan according to a fourth preset frequency, and returning to continuously judge whether the wind side coefficient is in the first preset interval.
11. An air conditioner, comprising:
the control device of an air conditioning system as claimed in any one of claims 6 to 10.
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