CN107906682B - 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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- CN107906682B CN107906682B CN201711072248.9A CN201711072248A CN107906682B CN 107906682 B CN107906682 B CN 107906682B CN 201711072248 A CN201711072248 A CN 201711072248A CN 107906682 B CN107906682 B CN 107906682B
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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- 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 comprises the following steps: detecting the discharge pressure Pc of the compressor, the outdoor environment temperature Th, the outlet refrigerant pressure P of the condenser or the inlet refrigerant pressure of the condenser and the outlet temperature Tf of the outdoor condenser in real time; controlling the fan to operate for a first preset time at a preset gear; obtaining a saturation temperature corresponding to the current refrigerant pressure according to any one of the condenser outlet refrigerant pressure P, the condenser inlet refrigerant pressure and the exhaust pressure Pc, and calculating a current wind side coefficient n; controlling the running gear of the fan according to the preset interval where the wind side coefficient n is located; the preset gear is an initial gear corresponding to the outdoor environment temperature Th when the air conditioning system is started. The invention provides a control method of an air conditioning system, which enables a fan to be in an optimal running state and improves the heat exchange effect of the whole air conditioning system.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioning system, a control device of the air conditioning system and an air conditioner.
Background
At present, with the improvement of living standard and the enhancement of energy-saving consciousness of people, the air conditioner has the characteristics of energy conservation, flexible control, easy installation and maintenance and the like, and has been moved into general families and is more and more widely applied. In recent years, energy is in short supply, national policies also put forward higher and higher requirements on energy-saving and efficient operation of the air conditioning system, and the control mode and control logic of the air conditioning system in the related technology cannot enable the air conditioning system to be in an efficient operation state at any time according to the operation characteristics of the unit, so that the heat transfer efficiency of the heat exchanger cannot be effectively exerted, the actual operation effect of the whole unit is further influenced, and efficient heat transfer cannot be realized.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
To this end, according to an embodiment of a first aspect of the present invention, a control method for an air conditioning system is provided.
In a second aspect of the embodiments of the present invention, a control device of an air conditioning system is provided.
In a third aspect of the present invention, an air conditioner is provided.
In view of the above, according to a first aspect of the present invention, the present invention provides a control method for an air conditioning system, the air conditioning system includes an outdoor unit, the outdoor unit includes an outdoor unit ambient temperature sensor, a compressor discharge pressure sensor, an outdoor heat exchanger discharge air temperature sensor, an outdoor condenser refrigerant pressure sensor, and a fan, the control method includes: detecting the discharge pressure Pc of the compressor, the outdoor environment temperature Th, the refrigerant pressure P at the outlet of the condenser or the refrigerant pressure at the inlet of the condenser and the air outlet temperature Tf of the outdoor condenser in real time; controlling the fan to operate for a first preset time at a preset gear; obtaining a saturation temperature corresponding to the current refrigerant pressure according to any one of the condenser outlet refrigerant pressure P, the condenser inlet refrigerant pressure and the exhaust pressure Pc, and calculating a current wind side coefficient n; controlling the running gear of the fan according to the preset interval where the wind side coefficient n is located; the preset gear is an initial gear corresponding to the outdoor environment temperature Th when the air conditioning system is started.
The control method of the air conditioning system provided by the invention runs the fan for the first preset time at the preset gear corresponding to the outdoor environment temperature Th after the air conditioner is started, and obtaining a saturation temperature Tb corresponding to the current refrigerant pressure according to any one of the condenser outlet refrigerant pressure P, the condenser inlet refrigerant pressure and the exhaust pressure Pc, and then the current wind side coefficient n is calculated, so that the running gear of the fan is controlled through the preset interval of the wind side coefficient n, the gear of the fan is automatically adjusted, and, the gear of the fan is reasonably and optimally controlled according to the preset interval of the wind side coefficient n, the gear of the fan is automatically adjusted, the fan is always in the optimal running state, therefore, the heat exchange efficiency and the reliability of the unit are improved, the unit operates in a more efficient and energy-saving mode, and the heat exchange effect of the whole air conditioning system is improved.
In addition, the control method of the air conditioning system in the above embodiment of the present invention may further have the following additional 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 less than or equal to b and greater than or equal to a, 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 range of a first preset interval is set to be less than or equal to b and greater than or equal to a; setting the range of the second preset interval to be smaller than a; the range of the third preset interval is set to be larger than b, so that the preset interval encompasses the whole constant range, and therefore the corresponding interval can be obtained no matter what the specific value of the wind side coefficient n is, and the effect of controlling the fan gear according to the wind side coefficient n is guaranteed.
In any one of the above technical solutions, preferably, the step of controlling the operating gear of the fan according to the preset interval where the wind side coefficient n is located specifically includes: judging whether the wind side coefficient n is in a first preset interval or not; when the wind side coefficient n is in a first preset interval, controlling the gear of the fan according to a preset exhaust pressure interval in which the compressor exhaust pressure Pc is located; when the wind side coefficient n is not in the first preset interval, adjusting the gear of the fan according to the preset interval where the wind side coefficient n is located, so that the wind side coefficient n is in the first preset interval.
In the technical scheme, when the wind side coefficient n is judged to be in a first preset interval, the gear of the fan is controlled according to a preset exhaust pressure interval in which the compressor exhaust pressure Pc is located; when the wind side coefficient n is judged not to be in the first preset interval, the gear of the fan is adjusted according to the preset interval where the wind side coefficient n is located, so that the wind side coefficient n is in the first preset interval, and the fan is always kept at the best gear.
In any of the above technical solutions, preferably, the preset exhaust pressure interval includes a first preset exhaust pressure interval, a second preset exhaust pressure interval, and a third preset exhaust pressure interval; the value range of the first preset exhaust pressure interval is smaller than A and larger than B; the value range of the second preset exhaust pressure interval is less than or equal to B; the third preset exhaust pressure interval is greater than or equal to A.
In the technical scheme, the value range of a first preset exhaust pressure interval is set to be smaller than A and larger than B; setting the value range of the second preset exhaust pressure interval to be less than or equal to B; the third preset exhaust pressure interval is set to be larger than or equal to A, so that the preset interval covers the whole constant range, corresponding intervals can be provided no matter what the specific value of the compressor exhaust pressure Pc is, and the effect of controlling the fan gear according to the compressor exhaust pressure Pc is further ensured.
In any of the above technical solutions, preferably, when the wind side coefficient n is within a first preset interval, the step of controlling the gear of the fan according to a preset discharge pressure interval where the discharge pressure Pc of the compressor is located specifically includes: acquiring the discharge pressure Pc of the compressor according to a first preset frequency; determining a preset exhaust pressure interval where the compressor exhaust pressure Pc is; when the exhaust pressure Pc of the compressor is in a first preset exhaust pressure interval, keeping the wind gear of the fan unchanged; when the compressor exhaust pressure Pc is in a second preset exhaust pressure interval, reducing the gear of the fan to the lowest gear; and when the exhaust pressure Pc of the compressor is in a third preset exhaust pressure interval, increasing the gear of the fan to the highest gear.
In the technical scheme, a preset exhaust pressure interval where the compressor exhaust pressure Pc is located is determined by obtaining the current compressor exhaust pressure Pc, wherein when the compressor exhaust pressure Pc is in the first preset exhaust pressure interval, namely the current compressor exhaust pressure Pc is smaller than A and larger than B, the gear of the fan is kept unchanged; when the compressor discharge pressure Pc is in a second preset discharge pressure interval, namely the current compressor discharge pressure Pc is less than or equal to B, reducing the gear of the fan, and after one or more operations, reducing the gear of the fan to the lowest; when the compressor exhaust pressure Pc is in a third preset exhaust pressure interval, namely when the current compressor exhaust pressure Pc is greater than or equal to A, the gear of the fan is increased, and after one or more operations, the gear of the fan is increased to the maximum, so that reasonable control of the gear of the fan is realized, and the fan is always in the optimal state when the air-conditioning system operates.
In any one of the above technical solutions, preferably, when the wind-side coefficient n is not within the first preset interval, the step of adjusting the gear of the fan according to the preset interval where the wind-side coefficient n is located so that the wind-side coefficient n is within the first preset interval specifically includes: judging whether the wind side coefficient n is in a second preset interval or not; when the wind side coefficient n is in a second preset interval, further judging whether the current gear of the fan is the lowest gear of the fan; when the current gear is the lowest gear, controlling the gear of the fan according to a preset exhaust pressure interval in which the compressor exhaust pressure Pc is located; when the current gear is not the lowest gear, the gear of the fan is reduced according to a second preset frequency, so that the wind side coefficient n is in a first preset interval.
In the technical scheme, when the wind side coefficient n is judged to be in the second preset interval, whether the current gear of the fan is the lowest gear of the fan is further judged, if the current gear is the lowest gear, the gear of the fan is controlled according to the preset exhaust pressure interval where the compressor exhaust pressure Pc is located, and if the current gear is not the lowest gear, the gear of the fan is reduced at the second preset frequency, so that the gear of the fan is reduced, and after one or more operations, the wind side coefficient n is in the first preset interval, and further automatic control of the gear of the fan is realized.
In any of the above technical solutions, preferably, when the wind-side coefficient n is not within the second preset interval, whether the wind-side coefficient n is within a third preset interval is further determined; when the wind side coefficient n is within a third preset interval, further judging whether the current gear of the fan is the highest gear of the fan; when the current gear is the highest gear, controlling the gear of the fan according to a preset exhaust pressure interval in which the compressor exhaust pressure Pc is located; and when the current gear is not the highest gear, increasing the gear of the fan according to a third preset frequency so that the wind side coefficient n is in a first preset interval.
In the technical scheme, when the wind side coefficient n is judged to be in a third preset interval, whether the current gear of the fan is the highest gear of the fan is further judged, if the current gear is the highest gear, the gear of the fan is controlled according to the preset exhaust pressure interval where the compressor exhaust pressure Pc is located, and if the current gear is not the highest gear, the gear of the fan is lifted at a third preset frequency, so that the gear of the fan is lifted, and after one or more operations, the wind side coefficient n is in the first preset interval, and further automatic control of the gear of the fan is realized.
In any of the above technical solutions, preferably, the step of calculating the wind-side coefficient n specifically includes: according to the formula: and (Tf-Th)/(Tb-Th), and calculating the wind side coefficient n.
In the technical scheme, through a formula: and (Tf-Th)/(Tb-Th), and calculating an air-out side coefficient n to obtain an air-out side coefficient n so as to control the operation gear of the fan.
According to a second aspect of the present invention, the present invention provides a control device for an air conditioning system, the air conditioning system includes an outdoor unit, the outdoor unit includes an outdoor unit ambient temperature sensor, a compressor discharge pressure sensor, an outdoor heat exchanger discharge air temperature sensor, an outdoor condenser refrigerant pressure sensor, and a fan, including: the detection unit is used for detecting the exhaust pressure Pc of the compressor, the outdoor environment temperature Th, the refrigerant pressure P at the outlet of the condenser or the refrigerant pressure at the inlet of the condenser and the air outlet temperature Tf 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 saturation temperature Tb corresponding to the current refrigerant pressure according to any one of the condenser outlet refrigerant pressure P, the condenser inlet refrigerant pressure and the exhaust pressure Pc; the second calculating unit is used for calculating the current wind side coefficient n; the second control unit controls the running gear of the fan according to the preset interval where the wind side coefficient n is located after the fan runs for the first preset time; the preset gear is an initial gear corresponding to the outdoor environment temperature Th when the air conditioning system is started.
The control device of the air conditioning system provided by the invention operates the fan for a first preset time at a preset gear corresponding to the outdoor environment temperature Th after the air conditioner is started, and obtaining the saturation temperature corresponding to the current refrigerant pressure according to any one of the condenser outlet refrigerant pressure P, the condenser inlet refrigerant pressure and the exhaust pressure Pc, and then the current wind side coefficient n is calculated, so that the running gear of the fan is controlled through the preset interval of the wind side coefficient n, the gear of the fan is automatically adjusted, and, the gear of the fan is reasonably and optimally controlled according to the preset interval of the wind side coefficient n, the gear of the fan is automatically adjusted, the fan is always in the optimal running state, therefore, the heat exchange efficiency and the reliability of the unit are improved, the unit operates in a more efficient and energy-saving mode, and the heat exchange effect of the whole air conditioning system is improved.
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 less than or equal to b and greater than or equal to a, 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 range of a first preset interval is set to be less than or equal to b and greater than or equal to a; setting the range of the second preset interval to be smaller than a; the range of the third preset interval is set to be larger than b, so that the preset interval encompasses the whole constant range, and therefore the corresponding interval can be obtained no matter what the specific value of the wind side coefficient n is, and the effect of controlling the fan gear according to the wind side coefficient n is guaranteed.
In any of the above technical solutions, preferably, the method further includes: the first judgment unit is used for judging whether the wind side coefficient n is in a first preset interval or not; the third control unit is used for controlling the gear of the fan according to the preset exhaust pressure interval where the compressor exhaust pressure Pc is located when the first judgment unit judges that the wind side coefficient n is in the first preset interval; when the first judging unit judges that the wind side coefficient n is not in the first preset interval, the gear of the fan is adjusted according to the preset interval where the wind side coefficient n is located, so that the wind side coefficient n is in the first preset interval.
In the technical scheme, when the wind side coefficient n is judged to be in a first preset interval, the gear of the fan is controlled according to a preset exhaust pressure interval in which the compressor exhaust pressure Pc is located; when the wind side coefficient n is judged not to be in the first preset interval, the gear of the fan is adjusted according to the preset interval where the wind side coefficient n is located, so that the wind side coefficient n is in the first preset interval, and the fan is always kept at the best gear.
In any of the above technical solutions, preferably, the preset exhaust pressure interval includes a first preset exhaust pressure interval, a second preset exhaust pressure interval, and a third preset exhaust pressure interval; the value range of the first preset exhaust pressure interval is smaller than A and larger than B; the value range of the second preset exhaust pressure interval is less than or equal to B; the third preset exhaust pressure interval is greater than or equal to A.
In the technical scheme, the value range of a first preset exhaust pressure interval is set to be smaller than A and larger than B; setting the value range of the second preset exhaust pressure interval to be less than or equal to B; the third preset exhaust pressure interval is set to be larger than or equal to A, so that the preset interval covers the whole constant range, corresponding intervals can be provided no matter what the specific value of the compressor exhaust pressure Pc is, and the effect of controlling the fan gear according to the compressor exhaust pressure Pc is further ensured.
In any of the above technical solutions, preferably, the method further includes: the acquisition unit is used for acquiring the compressor discharge pressure Pc according to a first preset frequency; the second judgment unit is used for judging a preset exhaust pressure interval where the compressor exhaust pressure Pc is located; the fourth control unit is used for keeping the wind gear of the fan unchanged when the second judging unit judges that the compressor exhaust pressure Pc is within the first preset exhaust pressure interval; when the second judgment unit judges that the compressor exhaust pressure Pc is in a second preset exhaust pressure interval, reducing the gear of the fan to the lowest gear; and when the second judgment unit judges that the compressor exhaust pressure Pc is in a third preset exhaust pressure interval, increasing the gear of the fan to the highest gear.
In the technical scheme, a preset exhaust pressure interval where the compressor exhaust pressure Pc is located is determined by obtaining the current compressor exhaust pressure Pc, wherein when the compressor exhaust pressure Pc is in the first preset exhaust pressure interval, namely the current compressor exhaust pressure Pc is smaller than A and larger than B, the gear of the fan is kept unchanged; when the compressor discharge pressure Pc is in a second preset discharge pressure interval, namely the current compressor discharge pressure Pc is less than or equal to B, reducing the gear of the fan, and after one or more operations, reducing the gear of the fan to the lowest; when the compressor exhaust pressure Pc is in a third preset exhaust pressure interval, namely when the current compressor exhaust pressure Pc is greater than or equal to A, the gear of the fan is increased, and after one or more operations, the gear of the fan is increased to the highest, so that reasonable control of the gear of the fan is realized, and the fan is always in the optimal state when the air-conditioning system operates.
In any of the above technical solutions, preferably, the method further includes: the third judging unit is used for judging whether the wind side coefficient n is in a second preset interval or not; the fifth control unit is used for reducing the gear of the fan according to the first preset frequency when the third judgment unit judges that the current gear is not the lowest gear, so that the wind side coefficient n is in a first preset interval; the fourth judging unit is used for further judging whether the current gear of the fan is the lowest gear of the fan or not when the third judging unit judges that the wind side coefficient n is in the second preset interval; and the sixth control unit is used for controlling the gear of the fan according to the preset exhaust pressure interval where the compressor exhaust pressure Pc is when the fourth judgment unit judges that the current gear is the lowest gear.
In the technical scheme, when the wind side coefficient n is judged to be in the second preset interval, whether the current gear of the fan is the lowest gear of the fan is further judged, if the current gear is the lowest gear, the gear of the fan is controlled according to the preset exhaust pressure interval where the compressor exhaust pressure Pc is located, and if the current gear is not the lowest gear, the gear of the fan is reduced at the second preset frequency, so that the gear of the fan is reduced, and after one or more operations, the wind side coefficient n is in the first preset interval, and further automatic control of the gear of the fan is realized.
In any of the above technical solutions, preferably, the method further includes: the fifth judging unit is used for further judging whether the wind side coefficient n is in the third preset interval or not when the third judging unit judges that the wind side coefficient n is not in the second preset interval; the seventh control unit is used for returning to continuously judge whether the wind side coefficient n is in the first preset interval or not when the fifth judging unit judges that the wind side coefficient n is not in the third preset interval; the sixth judging unit is used for further judging whether the current gear of the fan is the highest gear of the fan or not when the fifth judging unit judges that the wind side coefficient n is in the third preset interval; and the eighth control unit is used for increasing the gear of the fan according to a third preset frequency when the sixth judging unit judges that the current gear is not the highest gear, so that the wind side coefficient n is in the first preset interval.
In the technical scheme, when the wind side coefficient n is judged to be in a third preset interval, whether the current gear of the fan is the highest gear of the fan is further judged, if the current gear is the highest gear, the gear of the fan is controlled according to the preset exhaust pressure interval where the compressor exhaust pressure Pc is located, and if the current gear is not the highest gear, the gear of the fan is lifted at a third preset frequency, so that the gear of the fan is lifted, and after one or more operations, the wind side coefficient n is in the first preset interval, and further automatic control of the gear of the fan is realized.
In any one of the above technical solutions, preferably, the second calculating unit, configured to calculate the current wind-side coefficient n specifically includes: according to the formula: and (Tf-Th)/(Tb-Th), and calculating the wind side coefficient n.
In the technical scheme, through a formula: and (Tf-Th)/(Tb-Th), and calculating an air-out side coefficient n to obtain an air-out side coefficient n so as to control the operation gear of the fan.
According to a third aspect of the present invention, there is provided an air conditioner including: the control device for an air conditioning system according to any one of the above aspects.
The air conditioner according to the present invention includes the control device of the air conditioning system according to any one of the above-described embodiments, and therefore, all the advantageous effects of the control device of the air conditioning system according to any one of the above-described embodiments are obtained, and the description thereof is omitted.
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 another embodiment of the present invention;
fig. 4 is a schematic block diagram illustrating a control apparatus of an air conditioning system according to an embodiment of the present invention;
fig. 5 is a schematic block diagram illustrating a control apparatus of an air conditioning system according to another embodiment of the present invention;
fig. 6 is a schematic block diagram illustrating a control apparatus of an air conditioning system according to 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 by the specific embodiments disclosed below.
A throttle control method of an air conditioning system and a throttle control apparatus of an air conditioning system according to some embodiments of the present invention will be described with reference to fig. 1 to 6.
Fig. 1 is a flowchart illustrating a control method of an air conditioning system according to an embodiment of the present invention.
As shown in fig. 1, a control method of an air conditioning system according to an embodiment of the present invention includes:
step 102: detecting the discharge pressure Pc of the compressor, the outdoor environment temperature Th, the refrigerant pressure P at the outlet of the condenser or the refrigerant pressure at the inlet of the condenser and the air outlet temperature Tf of the outdoor condenser in real time;
step 104: controlling the fan to operate for a first preset time at an initial gear corresponding to the outdoor environment temperature Th;
step 106: obtaining a saturation temperature Tb corresponding to the current refrigerant pressure according to any one of the condenser outlet refrigerant pressure P, the condenser inlet refrigerant pressure and the compressor exhaust pressure Pc, and calculating a current wind side coefficient n;
step 108: and controlling the running gear of the fan according to the preset interval where the wind side coefficient n is located.
The control method of the air conditioning system provided by the invention runs the fan for the first preset time at the preset gear corresponding to the outdoor environment temperature Th after the air conditioner is started, and obtaining a saturation temperature Tb corresponding to the current refrigerant pressure according to any one of the condenser outlet refrigerant pressure P, the condenser inlet refrigerant pressure and the exhaust pressure Pc, and then the current wind side coefficient n is calculated, so that the running gear of the fan is controlled through the preset interval of the wind side coefficient n, the gear of the fan is automatically adjusted, and, the gear of the fan is reasonably and optimally controlled according to the preset interval of the wind side coefficient n, the gear of the fan is automatically adjusted, the fan is always in the optimal running state, therefore, the heat exchange efficiency and the reliability of the unit are improved, the unit operates in a more efficient and energy-saving mode, and the heat exchange effect of the whole air conditioning system is improved.
Fig. 2 is a flowchart illustrating a control method of an air conditioning system according to another embodiment of the present invention.
As shown in fig. 2, a control method of an air conditioning system according to another embodiment of the present invention includes:
step 202: detecting the discharge pressure Pc of the compressor, the outdoor environment temperature Th, the outlet refrigerant pressure P of the condenser or the inlet refrigerant pressure of the condenser and the outlet temperature Tf of the outdoor condenser in real time;
step 204: controlling the fan to operate for a first preset time at an initial gear corresponding to the outdoor environment temperature Th;
step 206: obtaining a saturation temperature Tb corresponding to the current refrigerant pressure according to any one of the condenser outlet refrigerant pressure P, the condenser inlet refrigerant pressure and the compressor exhaust pressure Pc, and calculating a current wind side coefficient n;
step 208: judging whether the wind side coefficient n is in a first preset interval, if so, executing the step 210, and if not, executing the step 220;
step 210: judging whether the wind side coefficient n is in a second preset interval, if so, executing the step 212, and if not, executing the step 216;
step 212: judging whether the current gear of the fan is the lowest gear of the fan, if so, executing step 220, and if not, executing step 214;
step 214: reducing the gear of the fan according to a second preset frequency, and re-executing the step 208;
step 216: judging whether the current gear of the fan is the highest gear of the fan, if so, executing the step 220, and if not, executing the step 218;
step 218: increasing the gear of the fan according to a third preset frequency, and re-executing the step 208;
step 220: and controlling the gear of the fan according to the preset exhaust pressure interval where the exhaust pressure Pc of the compressor is located.
The control method of the air conditioning system provided by the invention comprises the steps that after an air conditioner is started, a fan is operated for a first preset time at a preset gear corresponding to outdoor environment temperature Th, saturation temperature Tb corresponding to the current refrigerant pressure is obtained according to any one of condenser outlet refrigerant pressure P, condenser inlet refrigerant pressure and exhaust pressure Pc, then the current wind side coefficient n is calculated, and when the wind side coefficient n is in a first preset interval, the gear of the fan is controlled according to a preset exhaust pressure interval where the compressor exhaust pressure Pc is located; when the wind side coefficient n is judged to be in a second preset interval, further judging whether the current gear of the fan is the lowest gear of the fan, if so, controlling the gear of the fan according to the preset exhaust pressure interval where the compressor exhaust pressure Pc is located, and if not, reducing the gear of the fan at a second preset frequency so as to reduce the gear of the fan, and after one or more operations, till the wind side coefficient n is in the first preset interval; when the wind side coefficient n is judged to be in a third preset interval, whether the current gear of the fan is the highest gear of the fan is further judged, if the current gear is the highest gear, the gear of the fan is controlled according to the preset exhaust pressure interval where the compressor exhaust pressure Pc is located, and if the current gear is not the highest gear, the gear of the fan is promoted at a third preset frequency, so that the gear of the fan is promoted, after one or more operations, the gear of the fan is automatically adjusted until the wind side coefficient n is in the first preset interval, so that the fan is always in the best running state, the heat exchange efficiency and the reliability of the unit are improved, the unit runs in a more efficient and energy-saving mode, and the heat exchange effect of the whole air conditioning system is improved.
Fig. 3 is a flowchart illustrating a control method of an air conditioning system according to another embodiment of the present invention.
As shown in fig. 3, a control method of an air conditioning system according to another embodiment of the present invention includes:
step 302: detecting the discharge pressure Pc of the compressor, the outdoor environment temperature Th, the refrigerant pressure P at the outlet of the condenser or the refrigerant pressure at the inlet of the condenser and the air outlet temperature Tf of the outdoor condenser in real time;
step 304: controlling the fan to operate for a first preset time at an initial gear corresponding to the outdoor environment temperature Th;
step 306: obtaining the saturation temperature corresponding to the current refrigerant pressure according to any one of the condenser outlet refrigerant pressure P, the condenser inlet refrigerant pressure and the compressor discharge pressure Pc, and according to a formula: n is (Tf-Th)/(Tb-Th), and calculating the current wind side coefficient n;
step 308: judging whether the wind side coefficient n is in a first preset interval, if so, executing step 320, and if not, executing step 310;
step 310: judging whether the wind side coefficient n is in a second preset interval, if so, executing step 312, and if not, executing step 316;
step 312: judging whether the current gear of the fan is the lowest gear of the fan, if so, executing step 320, and if not, executing step 314;
step 314: reducing the gear of the fan according to a second preset frequency, and re-executing the step 308;
step 316: judging whether the current gear of the fan is the highest gear of the fan, if so, executing step 320, and if not, executing step 318;
step 318: increasing the gear of the fan according to a third preset frequency;
step 320: obtaining the exhaust pressure Pc of the compressor;
step 322: determining a preset exhaust pressure interval where the compressor exhaust pressure Pc is located;
step 324: the compressor discharge pressure Pc is in a second preset discharge pressure interval;
step 326: reducing the gear of the fan until the lowest gear is reached;
step 328: the compressor discharge pressure Pc is in a first preset discharge pressure interval;
step 330: keeping the wind shield of the fan unchanged;
step 332: the compressor discharge pressure Pc is in a third preset discharge pressure interval;
step 334: and increasing the gear of the fan until the highest gear.
The control method of the air conditioning system provided by the invention is characterized in that after the air conditioner is started, the fan is operated for a first preset time at a preset gear corresponding to the outdoor environment temperature Th, the saturation temperature Tb corresponding to the current refrigerant pressure is obtained according to any one of the condenser outlet refrigerant pressure P, the condenser inlet refrigerant pressure and the exhaust pressure Pc, and according to the formula: when the wind side coefficient n is in a first preset interval, obtaining the current compressor discharge pressure Pc, and determining a preset discharge pressure interval where the compressor discharge pressure Pc is located, wherein when the compressor discharge pressure Pc is in the first preset discharge pressure interval, namely when the current compressor discharge pressure Pc is less than or equal to A and greater than or equal to B, the gear of the fan is kept unchanged; when the compressor discharge pressure Pc is in a second preset discharge pressure interval, namely the current compressor discharge pressure Pc is less than B, reducing the gear of the fan, and after one or more operations, reducing the gear of the fan to the lowest; when the compressor discharge pressure Pc is in a third preset discharge pressure interval, namely the current compressor discharge pressure Pc is greater than A, increasing the gear of the fan, and after one or more operations, increasing the gear of the fan to the highest; when the wind side coefficient n is judged to be in a second preset interval, further judging whether the current gear of the fan is the lowest gear of the fan, if so, controlling the gear of the fan according to the preset exhaust pressure interval where the compressor exhaust pressure Pc is located, and if not, reducing the gear of the fan at a second preset frequency so as to reduce the gear of the fan, and after one or more operations, till the wind side coefficient n is in the first preset interval; when the wind side coefficient n is judged to be in a third preset interval, whether the current gear of the fan is the highest gear of the fan is further judged, if the current gear is the highest gear, the gear of the fan is controlled according to the preset exhaust pressure interval where the compressor exhaust pressure Pc is located, and if the current gear is not the highest gear, the gear of the fan is promoted at a third preset frequency, so that the gear of the fan is promoted, after one or more operations, the gear of the fan is automatically adjusted until the wind side coefficient n is in the first preset interval, so that the fan is always in the best running state, the heat exchange efficiency and the reliability of the unit are improved, the unit runs in a more efficient and energy-saving mode, and the heat exchange effect of the whole air conditioning system is improved.
In a specific embodiment, 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 less than or equal to b and greater than or equal to a, 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. For example: a is 0.1; b is 2.0, i.e., the first predetermined interval is [0.1,2.0], the second predetermined interval is less than 0.1, and the third predetermined interval is greater than 2.0.
In the specific embodiment, after the air conditioner unit receives the starting command, the air conditioner unit is started, the fan runs for 20 seconds according to the initial wind level corresponding to the outdoor environment temperature Th, and the compressor discharge pressure Pc, the outdoor environment temperature Th, the condenser outlet refrigerant pressure P or the condenser inlet refrigerant pressure, and the outdoor condenser outlet temperature Tf are detected in real time. Obtaining the saturation temperature corresponding to the current refrigerant pressure according to the condenser outlet refrigerant pressure P, and according to a formula: and (Tf-Th)/(Tb-Th), and calculating the wind side coefficient n.
Further, whether the wind side coefficient n is satisfied or not is judged, and if so, the fan enters the control logic of the compressor discharge pressure Pc. If Pc is larger than or equal to A, the gear of the current control fan is increased by 1 gear until the wind gear is increased to the maximum wind gear, and the gear is not increased any more; if Pc is less than or equal to B, reducing the gear of the current control fan by 1 gear until the gear is reduced to 0, and not reducing the gear; and if B is less than Pc and less than A, keeping the current wind gear unadjusted. The compressor discharge pressure Pc is detected every several seconds, and repeated judgment is performed.
If the wind side coefficient n is not established as [ a, b ], further judging whether n is greater than a, if so, further judging whether the current wind gear is the minimum wind gear, if so, continuing entering compressor exhaust pressure Pc control logic to adjust the wind gear, if not, reducing the gear of the current control fan by 1 gear, and judging once every several minutes;
if the wind side coefficient n < a is not true, further judging whether n > b is true, if so, further judging whether the current wind gear is the maximum wind gear, if so, continuing entering compressor exhaust pressure Pc control logic to adjust the wind gear, if not, adding 1 gear to the gear of the current control fan, and judging once every several minutes.
It should be noted here that, since the wind-side coefficient n and the first preset interval, the second preset interval, and the third preset interval include all the wind-side coefficient n, when it is determined that the wind-side coefficient n is not in the second preset interval, it is determined that the wind-side coefficient n is in the third preset interval, so that the control of the fan gear can be realized without further determination on the wind-side coefficient n; correspondingly, when the wind side coefficient n is judged not to be in the third preset interval, the wind side coefficient n is shown to be in the second preset interval, and meanwhile, the mode of controlling the gear of the fan is to control the rotating speed of the fan.
As shown in fig. 4, according to a second aspect of the present invention, the present invention provides a control device 400 for an air conditioning system, the air conditioning system includes an outdoor unit, the outdoor unit includes an outdoor unit ambient temperature sensor, a compressor and a compressor discharge pressure sensor, an outdoor heat exchanger and an outdoor heat exchanger discharge air temperature sensor, an outdoor condenser refrigerant pressure sensor, and a fan, including: the detection unit 402 is used for detecting the discharge pressure Pc of the compressor, the outdoor environment temperature Th, the condenser outlet refrigerant pressure P or the condenser inlet refrigerant pressure and the outdoor condenser Tf outlet temperature Tf in real time; a first control unit 404, configured to control the fan to operate at a preset gear for a first preset time; a first calculating unit 406, configured to obtain a saturation temperature corresponding to a current refrigerant pressure according to any one of a condenser outlet refrigerant pressure P, a condenser inlet refrigerant pressure, and the discharge pressure Pc; a second calculating unit 408, configured to calculate a current wind-side coefficient n; the second control unit 410 controls the operation gear of the fan according to the preset interval where the wind side coefficient n is located after the fan operates for the first preset time; the preset gear is an initial gear corresponding to the outdoor environment temperature Th when the air conditioning system is started.
The control device of the air conditioning system provided by the invention operates the fan for a first preset time at a preset gear corresponding to the outdoor environment temperature Th after the air conditioner is started, and obtaining the saturation temperature corresponding to the current refrigerant pressure according to any one of the condenser outlet refrigerant pressure P, the condenser inlet refrigerant pressure and the exhaust pressure Pc, and then the current wind side coefficient n is calculated, so that the running gear of the fan is controlled through the preset interval of the wind side coefficient n, the gear of the fan is automatically adjusted, and, the gear of the fan is reasonably and optimally controlled according to the preset interval of the wind side coefficient n, the gear of the fan is automatically adjusted, the fan is always in the optimal running state, therefore, the heat exchange efficiency and the reliability of the unit are improved, the unit operates in a more efficient and energy-saving mode, and the heat exchange effect of the whole air conditioning system is improved.
As shown in fig. 5, according to another embodiment of the present invention, the present invention provides a control device 500 for an air conditioning system, the air conditioning system includes an outdoor unit, the outdoor unit includes an outdoor unit ambient temperature sensor, a compressor and compressor discharge pressure sensor, an outdoor heat exchanger and an outdoor heat exchanger outlet air temperature sensor, an outdoor condenser refrigerant pressure sensor, and a fan, including: the detection unit 502 is used for detecting the discharge pressure Pc of the compressor, the outdoor environment temperature Th, the condenser outlet refrigerant pressure P or the condenser inlet refrigerant pressure and the outdoor condenser outlet temperature Tf 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 saturation temperature corresponding to a current refrigerant pressure according to any one of a condenser outlet refrigerant pressure P, a condenser inlet refrigerant pressure, and the discharge pressure Pc; a second calculating unit 508, configured to calculate a current wind-side coefficient n; the second control unit 510, after the fan operates for a first preset time, controlling an operating gear of the fan according to a preset interval where the wind side coefficient n is located; the preset gear is an initial gear corresponding to the outdoor environment temperature Th when the air conditioning system is started; a first determining unit 512, configured to determine whether the wind-side coefficient n is within a first preset interval; the third control unit 514 is configured to control the gear of the fan according to a preset exhaust pressure interval where the compressor exhaust pressure Pc is located when the first determining unit 512 determines that the wind side coefficient n is within the first preset interval; when the first determining unit 512 determines that the wind-side coefficient n is not within the first preset interval, the gear of the fan is adjusted according to the preset interval where the wind-side coefficient n is located, so that the wind-side coefficient n is within the first preset interval; a third determining unit 516, configured to determine whether the wind-side coefficient n is within a second preset interval; the fifth control unit 518 is configured to, when the third determination unit determines that the current gear is not the lowest gear, reduce the gear of the fan according to a first preset frequency so that the wind side coefficient n is within a first preset interval; the fourth judging unit 520 is configured to further judge whether the current gear of the fan is the lowest gear of the fan when the third judging unit judges that the wind-side coefficient n is within the second preset interval; the sixth control unit 522 is configured to, when the fourth determination unit determines that the current gear is the lowest gear, control the gear of the fan according to a preset exhaust pressure interval in which the compressor exhaust pressure Pc is located; a fifth judging unit 524, configured to, when the third judging unit judges that the wind-side coefficient n is not within the second preset interval, further judge whether the wind-side coefficient n is within a third preset interval; the seventh control unit 526, configured to, when the fifth determining unit determines that the wind-side coefficient n is not within the third preset interval, return to continuously determine whether the wind-side coefficient n is within the first preset interval; a sixth judging unit 528, configured to further judge whether the current gear of the fan is the highest gear of the fan when the fifth judging unit judges that the wind-side coefficient n is within the third preset interval; the eighth control unit 530 is configured to, when the sixth determining unit determines that the current gear is not the highest gear, increase the gear of the fan according to a third preset frequency, so that the wind side coefficient n is within the first preset interval.
As shown in fig. 6, according to another embodiment of the present invention, the present invention provides a control device 600 for an air conditioning system, the air conditioning system includes an outdoor unit, the outdoor unit includes an outdoor unit ambient temperature sensor, a compressor and compressor discharge pressure sensor, an outdoor heat exchanger and an outdoor heat exchanger outlet air temperature sensor, an outdoor condenser refrigerant pressure sensor, and a fan, including: the detection unit 602 is configured to detect, in real time, a compressor discharge pressure Pc, an outdoor environment temperature Th, a condenser outlet refrigerant pressure P or a condenser inlet refrigerant pressure, and an outdoor condenser Tf outlet temperature Tf; the first control unit 604 is configured to control the fan to operate at a preset gear for a first preset time; a first calculating unit 606, configured to obtain a saturation temperature corresponding to a current refrigerant pressure according to any one of a condenser outlet refrigerant pressure P, a condenser inlet refrigerant pressure, and the exhaust pressure Pc; a second calculating unit 608, configured to calculate a current wind-side coefficient n; the second control unit 610 controls the operation gear of the fan according to the preset interval where the wind side coefficient n is located after the fan operates for the first preset time; the preset gear is an initial gear corresponding to the outdoor environment temperature Th when the air conditioning system is started; a first determining unit 612, configured to determine whether the wind-side coefficient n is within a first preset interval; the third control unit 614 is configured to control the gear of the fan according to a preset exhaust pressure interval where the compressor exhaust pressure Pc is located when the first determining unit 612 determines that the wind side coefficient n is within the first preset interval; when the first judging unit 612 judges that the wind-side coefficient n is not in the first preset interval, adjusting the gear of the fan according to the preset interval in which the wind-side coefficient n is located, so that the wind-side coefficient n is in the first preset interval; a third determining unit 616, configured to determine whether the wind-side coefficient n is within a second preset interval; the fifth control unit 618 is configured to, when the third determination unit determines that the current gear is not the lowest gear, decrease the gear of the fan according to a first preset frequency so that the wind side coefficient n is within a first preset interval; the fourth judging unit 620 is configured to further judge whether the current gear of the fan is the lowest gear of the fan when the third judging unit judges that the wind-side coefficient n is within the second preset interval; a sixth control unit 622, configured to control the gear of the fan according to a preset exhaust pressure interval in which the compressor exhaust pressure Pc is located when the fourth determination unit determines that the current gear is the lowest gear; a fifth judging unit 624, configured to, when the third judging unit judges that the wind-side coefficient n is not within the second preset interval, further judge whether the wind-side coefficient n is within the third preset interval; a seventh control unit 626, configured to, when the fifth determining unit determines that the wind-side coefficient n is not within the third preset interval, return to continuously determine whether the wind-side coefficient n is within the first preset interval; a sixth judging unit 628, configured to, when the fifth judging unit judges that the wind-side coefficient n is within the third preset interval, further judge whether the current gear of the fan is the highest gear of the fan; the eighth control unit 630 is configured to, when the sixth determining unit determines that the current gear is not the highest gear, increase the gear of the fan according to a third preset frequency so that the wind side coefficient n is within the first preset interval; an obtaining unit 632, configured to obtain a compressor discharge pressure Pc according to a first preset frequency; a second determination unit 634, which determines a preset discharge pressure interval where the discharge pressure Pc of the compressor is located; a fourth control unit 636, configured to keep the wind level of the fan unchanged when the second determining unit 634 determines that the compressor discharge pressure Pc is within the first preset discharge pressure interval; when the second determination unit 634 determines that the compressor discharge pressure Pc is within the second preset discharge pressure interval, the gear of the fan is reduced to the lowest gear; when the second determination unit 634 determines that the compressor discharge pressure Pc is within the third preset discharge pressure interval, the gear of the fan is increased to the highest gear.
In a specific embodiment, 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 less than or equal to b and greater than or equal to a, 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, after the air conditioner unit receives the starting command, the air conditioner unit is started, the fan runs for a plurality of seconds according to the initial wind level corresponding to the outdoor environment temperature Th, and the compressor discharge pressure Pc, the outdoor environment temperature Th, the condenser outlet refrigerant pressure P or the condenser inlet refrigerant pressure Tf and the outdoor condenser outlet temperature Tf are detected in real time. Obtaining a saturation temperature corresponding to the current refrigerant pressure according to any one of the condenser outlet refrigerant pressure P, the condenser inlet refrigerant pressure and the exhaust pressure Pc, and according to a formula: n is (Tf-Th) ÷ (Tb-Th), and the wind-side coefficient n is calculated.
Further, whether the wind side coefficient n is satisfied or not is judged, and if so, the fan enters the control logic of the compressor discharge pressure Pc. If Pc is larger than or equal to A, the gear of the current control fan is increased by 1 gear until the wind gear is increased to the maximum wind gear, and the gear is not increased any more; if Pc is less than or equal to B, reducing the gear of the current control fan by 1 gear until the gear is reduced to 0, and not reducing the gear; and if B is less than Pc and less than A, keeping the current wind gear unadjusted. The compressor discharge pressure Pc is detected every several seconds, and repeated judgment is performed.
If the wind side coefficient n is not established as [ a, b ], further judging whether n is greater than a, if so, further judging whether the current wind gear is the minimum wind gear, if so, continuing entering compressor exhaust pressure Pc control logic to adjust the wind gear, if not, reducing the gear of the current control fan by 1 gear, and judging once every several minutes;
if the wind side coefficient n < a is not true, further judging whether n > b is true, if so, further judging whether the current wind gear is the maximum wind gear, if so, continuing entering compressor exhaust pressure Pc control logic to adjust the wind gear, if not, adding 1 gear to the gear of the current control fan, and judging once every several minutes.
It should be noted here that, since the wind-side coefficient n and the first preset interval, the second preset interval, and the third preset interval include all the wind-side coefficient n, when it is determined that the wind-side coefficient n is not in the second preset interval, it is determined that the wind-side coefficient n is in the third preset interval, so that the control of the fan gear can be realized without further determination on the wind-side coefficient n; correspondingly, when the wind side coefficient n is judged not to be in the third preset interval, the wind side coefficient n is shown to be in the second preset interval, and meanwhile, the mode of controlling the gear of the fan is to control the rotating speed of the fan.
In summary, according to the control method, the control device and the air conditioner of the air conditioning system provided by the present invention, after the air conditioner is started, the fan is operated for the first preset time at the preset gear corresponding to the outdoor environment temperature Th, the saturation temperature corresponding to the current refrigerant pressure is obtained according to any one of the condenser outlet refrigerant pressure P, the condenser inlet refrigerant pressure and the exhaust pressure Pc, and then the current wind side coefficient n is calculated, so that the operating gear of the fan is controlled through the preset interval where the wind side coefficient n is located, and further the gear of the fan is automatically adjusted, and the gear of the fan is reasonably optimized and controlled according to the preset interval where the wind side coefficient n is located, so that the gear of the fan is automatically adjusted, and the fan is always in the optimal operating state, thereby improving the heat exchange efficiency and reliability of the unit, and operating in a more efficient and energy-saving manner, the heat exchange effect of the whole air conditioning system is improved.
In the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and the terms "connected" and "connecting" are used in a broad sense, e.g., "connected" may be a fixed connection, a detachable connection, or an integral connection; the terms "connected" and "connected" may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations.
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 (15)
1. A control method of an air conditioning system, the air conditioning system comprises an outdoor unit, the outdoor unit comprises an outdoor unit environment temperature sensor, a compressor discharge pressure sensor, an outdoor heat exchanger air outlet temperature sensor, an outdoor condenser refrigerant pressure sensor and a fan, and the control method is characterized by comprising the following steps:
detecting the discharge pressure Pc of the compressor, the outdoor environment temperature Th, the refrigerant pressure P at the outlet of the condenser or the refrigerant pressure at the inlet of the condenser and the air outlet temperature Tf of the outdoor condenser in real time;
controlling the fan to operate for a first preset time at a preset gear;
obtaining a saturation temperature Tb corresponding to the current refrigerant pressure according to any one of the condenser outlet refrigerant pressure P, the condenser inlet refrigerant pressure and the compressor exhaust pressure Pc, and calculating a current wind side coefficient n;
controlling the running gear of the fan according to the preset interval where the wind side coefficient n is located;
the preset gear is an initial gear corresponding to the outdoor environment temperature Th when the air conditioning system is started;
the step of calculating the wind side coefficient n specifically includes:
according to the formula: and (Tf-Th)/(Tb-Th), and calculating the wind side coefficient n.
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 less than or equal to b and greater than or equal to a, 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 the operating gear of the fan according to the preset interval where the wind side coefficient n is located specifically comprises:
judging whether the wind side coefficient n is within the first preset interval or not;
when the wind side coefficient n is in the first preset interval, controlling the gear of the fan according to a preset exhaust pressure interval in which the compressor exhaust pressure Pc is located;
when the wind side coefficient n is not in the first preset interval, adjusting the gear of the fan according to the preset interval where the wind side coefficient n is located, so that the wind side coefficient n is in the first preset interval.
4. The control method of an air conditioning system according to claim 3,
the preset exhaust pressure interval comprises a first preset exhaust pressure interval, a second preset exhaust pressure interval and a third preset exhaust pressure interval;
the value range of the first preset exhaust pressure interval is smaller than A and larger than B; the value range of the second preset exhaust pressure interval is less than or equal to B; the third preset exhaust pressure interval is greater than or equal to A.
5. The method of claim 4, wherein the step of controlling the gear of the fan according to a preset discharge pressure interval where the compressor discharge pressure Pc is located when the wind side coefficient n is within the first preset interval specifically comprises:
acquiring the discharge pressure Pc of the compressor according to a first preset frequency;
determining a preset exhaust pressure interval where the compressor exhaust pressure Pc is located;
when the compressor discharge pressure Pc is within the first preset discharge pressure interval, keeping the wind gear of the fan unchanged;
when the compressor discharge pressure Pc is within the second preset discharge pressure interval, reducing the gear of the fan to the lowest gear;
and when the compressor exhaust pressure Pc is within the third preset exhaust pressure interval, increasing the gear of the fan to the highest gear.
6. The method according to claim 3, wherein when the wind-side coefficient n is not within the first preset interval, the step of adjusting the gear of the fan according to the preset interval where the wind-side coefficient n is located so that the wind-side coefficient n is within the first preset interval specifically comprises:
judging whether the wind side coefficient n is within the second preset interval or not;
when the wind side coefficient n is within the second preset interval, further judging whether the current gear of the fan is the lowest gear of the fan;
when the current gear is the lowest gear, controlling the gear of the fan according to a preset exhaust pressure interval where the compressor exhaust pressure Pc is located;
and when the current gear is not the lowest gear, reducing the gear of the fan according to a first preset frequency so that the wind side coefficient n is in the first preset interval.
7. The control method of an air conditioning system according to claim 6,
when the wind side coefficient n is not in the second preset interval, further judging whether the wind side coefficient n is in the third preset interval;
when the wind side coefficient n is within the third preset interval, further judging whether the current gear of the fan is the highest gear of the fan;
when the current gear is the highest gear, controlling the gear of the fan according to a preset exhaust pressure interval where the compressor exhaust pressure Pc is located;
when the current gear is not the highest gear, increasing the gear of the fan according to a third preset frequency so that the wind side coefficient n is within the first preset interval;
and when the wind side coefficient n is not in the third preset interval, returning to continuously judge whether the wind side coefficient n is in the first preset interval.
8. The utility model provides an air conditioning system's controlling means, air conditioning system includes the off-premises station, the off-premises station includes off-premises station ambient temperature sensor, compressor and compressor discharge pressure sensor, outdoor heat exchanger and outdoor heat exchanger air-out temperature sensor, outdoor condenser refrigerant pressure sensor to and the fan, its characterized in that includes:
the detection unit is used for detecting the exhaust pressure Pc of the compressor, the outdoor environment temperature Th, the refrigerant pressure P at the outlet of the condenser or the refrigerant pressure at the inlet of the condenser and the air outlet temperature Tf 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 saturation temperature Tb corresponding to the current refrigerant pressure according to any one of the condenser outlet refrigerant pressure P, the condenser inlet refrigerant pressure and the compressor discharge pressure Pc;
the second calculating unit is used for calculating the current wind side coefficient n;
the second control unit is used for controlling the running gear of the fan according to the preset interval where the wind side coefficient n is located after the fan runs for the first preset time;
the preset gear is an initial gear corresponding to the outdoor environment temperature Th when the air conditioning system is started;
the second calculating unit, configured to calculate the current wind-side coefficient n specifically includes:
according to the formula: and (Tf-Th)/(Tb-Th), and calculating the wind side coefficient n.
9. The control device of an air conditioning system according to claim 8,
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 less than or equal to b and greater than or equal to a, 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.
10. The control device of an air conditioning system according to claim 9, characterized by further comprising:
the first judgment unit is used for judging whether the wind side coefficient n is in the first preset interval or not;
the third control unit is used for controlling the gear of the fan according to the preset exhaust pressure interval where the compressor exhaust pressure Pc is located when the first judgment unit judges that the wind side coefficient n is in the first preset interval; when the first judging unit judges that the wind side coefficient n is not in the first preset interval, the gear of the fan is adjusted according to the preset interval in which the wind side coefficient n is located, so that the wind side coefficient n is in the first preset interval.
11. The control device of an air conditioning system according to claim 10,
the preset exhaust pressure interval comprises a first preset exhaust pressure interval, a second preset exhaust pressure interval and a third preset exhaust pressure interval;
the value range of the first preset exhaust pressure interval is smaller than A and larger than B; the value range of the second preset exhaust pressure interval is less than or equal to B; the third preset exhaust pressure interval is greater than or equal to A.
12. The control device of an air conditioning system according to claim 11, characterized by further comprising: the acquisition unit is used for acquiring the compressor discharge pressure Pc according to a first preset frequency;
the second judgment unit is used for judging a preset exhaust pressure interval where the compressor exhaust pressure Pc is located;
the fourth control unit is used for keeping the wind gear of the fan unchanged when the second judging unit judges that the compressor exhaust pressure Pc is within the first preset exhaust pressure interval; when the second judgment unit judges that the compressor exhaust pressure Pc is within the second preset exhaust pressure interval, reducing the gear of the fan to the lowest gear; and when the second judgment unit judges that the compressor exhaust pressure Pc is within the third preset exhaust pressure interval, increasing the gear of the fan to the highest gear.
13. The control device of an air conditioning system according to claim 12, characterized by further comprising:
the third judging unit is used for judging whether the wind side coefficient n is in the second preset interval or not;
the fifth control unit is used for reducing the gear of the fan according to a first preset frequency when the third judgment unit judges that the current gear is not the lowest gear, so that the wind side coefficient n is within the first preset interval;
the fourth judging unit is used for further judging whether the current gear of the fan is the lowest gear of the fan or not when the third judging unit judges that the wind side coefficient n is in the second preset interval;
and the sixth control unit is used for controlling the gear of the fan according to a preset exhaust pressure interval where the compressor exhaust pressure Pc is located when the fourth judgment unit judges that the current gear is the lowest gear.
14. The control device of an air conditioning system according to claim 13, characterized by further comprising:
a fifth judging unit, configured to further judge whether the wind-side coefficient n is within the third preset interval when the third judging unit judges that the wind-side coefficient n is not within the second preset interval;
a seventh control unit, configured to, when the fifth determining unit determines that the wind-side coefficient n is not within the third preset interval, return to continuously determine whether the wind-side coefficient n is within the first preset interval;
a sixth judging unit, configured to further judge whether a current gear of the fan is a highest gear of the fan when the fifth judging unit judges that the wind side coefficient n is within the third preset interval;
and the eighth control unit is configured to increase the gear of the fan according to a third preset frequency when the sixth judgment unit judges that the current gear is not the highest gear, so that the wind side coefficient n is within the first preset interval.
15. An air conditioner, comprising:
the control device of an air conditioning system as claimed in any one of claims 8 to 14.
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| CN110440406B (en) * | 2019-08-05 | 2020-12-11 | 珠海格力电器股份有限公司 | Fan control method, device and unit equipment |
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| JP3445861B2 (en) * | 1995-03-10 | 2003-09-08 | 東芝キヤリア株式会社 | Air conditioner |
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