CN107906668B - Throttling control method and device of air conditioning system and air conditioner - Google Patents
Throttling control method and device of air conditioning system and air conditioner Download PDFInfo
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- CN107906668B CN107906668B CN201711071433.6A CN201711071433A CN107906668B CN 107906668 B CN107906668 B CN 107906668B CN 201711071433 A CN201711071433 A CN 201711071433A CN 107906668 B CN107906668 B CN 107906668B
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Abstract
The invention provides a throttling control method and device of an air conditioning system and an air conditioner, wherein the throttling control method comprises the following steps: detecting the exhaust temperature Tp and the outdoor environment temperature Th of the compressor, any one of the outlet refrigerant pressure P of the condenser, the inlet refrigerant pressure of the condenser and the exhaust pressure of the compressor, and the outlet air temperature Tf of the outdoor condenser in real time; recording the running time of the compressor, and judging whether the running time reaches a first preset time or not; when the running time does not reach the first preset time, controlling the throttle device to work according to the exhaust temperature Tp of the compressor; and when the running time exceeds a first preset time, controlling the throttle device to work according to the wind side coefficient n. According to the throttling control method of the air conditioning system, the air conditioning system is always in the best refrigerant circulation amount, and the heat exchange efficiency is improved.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a throttling control method of an air conditioning system, a throttling 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, in an embodiment of a first aspect of the present invention, a throttle control method of an air conditioning system is provided.
In a second aspect of the embodiment of the invention, a throttling 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 throttling 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 and compressor discharge temperature sensor, an outdoor heat exchanger and an outdoor heat exchanger outlet air temperature sensor, an outdoor condenser refrigerant pressure sensor, and a throttling device, the throttling control method includes: detecting the exhaust temperature Tp and the outdoor environment temperature Th of the compressor, any one of the outlet refrigerant pressure P of the condenser, the inlet refrigerant pressure of the condenser and the exhaust pressure of the compressor, and the outlet air temperature Tf of the outdoor condenser in real time; recording the running time of the compressor, and judging whether the running time reaches a first preset time or not; when the running time does not reach the first preset time, controlling the throttle device to work according to the exhaust temperature Tp of the compressor; and when the running time reaches a first preset time, controlling the throttle device to work according to the wind side coefficient n.
The throttle control method of the air conditioning system provided by the invention records the running time of the compressor after the air conditioner is started, and controls the throttle device to work according to the exhaust temperature Tp of the compressor when the running time of the compressor does not reach the first preset time; when the running time of the compressor reaches a first preset time, the throttle device is controlled to work according to the wind side coefficient n, then the throttle device of the air conditioner is automatically adjusted, in addition, the throttle device is reasonably optimized according to the exhaust temperature Tp of the compressor and the wind side coefficient n, the opening degree of the automatic control throttle device is formed, the opening degree of the throttle device is adjusted according to the actual running condition of the air conditioner in real time, the air conditioning system is always in the best refrigerant circulation quantity, the heat exchange efficiency and the reliability of the unit are improved, the unit runs in a more efficient energy-saving mode, and the heat exchange effect of the whole air conditioning system is improved.
In addition, the throttle control method of the air conditioning system in the above embodiment provided by the present invention may further have the following additional technical features:
in the above technical solution, preferably, when the operation time does not reach the preset time, the step of controlling the operation of the throttling device according to the discharge temperature Tp of the compressor specifically includes: judging whether the compressor exhaust temperature Tp is in an ascending interval or a descending interval according to the change condition of the compressor exhaust temperature Tp in the running time; when the compressor discharge temperature Tp is in the rising interval, controlling the opening degree of the throttling device to gradually increase; when the compressor discharge temperature Tp is in the fall interval, the opening degree of the throttle device is controlled to be gradually reduced.
In the technical scheme, when the running time does not reach the preset time, judging whether the compressor exhaust temperature Tp is in an ascending interval or a descending interval according to the change condition of the compressor exhaust temperature Tp in the running time, and when the compressor exhaust temperature Tp is in the ascending interval, gradually increasing the opening degree of the throttling device; when the compressor discharge temperature Tp is in the fall interval, the opening degree of the throttle device is gradually decreased. For example: the exhaust temperature Tp of the compressor is increased from 60 degrees to 80 degrees, and the opening degree of the throttling device is gradually increased; the discharge temperature Tp of the compressor is reduced from 70 degrees to 50 degrees, and the opening degree of the throttling device is gradually reduced.
In any of the above technical solutions, preferably, when the operation time reaches the preset time, the step of controlling the operation of the throttling device according to the wind side coefficient n specifically includes: calculating a wind side coefficient n; judging whether the wind side coefficient n is in a preset interval or not; when the wind side coefficient n is in a preset interval, controlling the throttle device to work according to the exhaust temperature Tp of the compressor; and when the wind side coefficient n is not in the preset interval, adjusting the opening of the throttling device according to the interval where the wind side coefficient n is located, so that the wind side coefficient n is in the preset interval.
In the technical scheme, the air side coefficient n is calculated, and whether the air side coefficient n is in a preset interval is judged, wherein when the air side coefficient n is in the preset interval, the throttle device is controlled to work according to the exhaust temperature Tp of the compressor, and when the air side coefficient n is not in the preset interval, the opening degree of the throttle device is adjusted according to the interval where the air side coefficient n is located, so that the air side coefficient n is in the preset interval, and the optimal refrigerant circulation quantity is obtained.
In any of the above technical solutions, preferably, the step of calculating the wind-side coefficient n specifically includes: 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; according to the formula: and (Tf-Th)/(Tb-Th), and calculating the wind side coefficient n.
In the technical scheme, a 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 compressor exhaust pressure, and then the formula is used for: 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 opening of the throttling device.
In any of the above technical solutions, preferably, when the wind-side coefficient n is not within the preset interval, the step of adjusting the opening degree of the throttling device according to the interval where the wind-side coefficient n is located so that the wind-side coefficient n is within the preset interval specifically includes: when the wind side coefficient n is not in the preset interval, continuously judging whether the wind side coefficient n is larger than the maximum value of the preset interval; and when the wind side coefficient n is larger than the maximum value of the preset interval, controlling the throttling device to be opened by a first preset opening degree every second preset time, and returning to continuously judge whether the wind side coefficient n is in the preset interval.
In the technical scheme, when the wind side coefficient n is judged not to be in the preset interval, whether the wind side coefficient n is smaller than the minimum value of the preset interval or not is continuously judged, when the wind side coefficient n is smaller than the minimum value of the preset interval, the throttling device is controlled to be turned off by the first preset opening degree, and after the second preset time, when the wind side coefficient n is still smaller than the minimum value of the preset interval, the throttling device is continuously controlled to be turned off by the first preset opening degree.
In any of the above technical solutions, preferably, when the wind-side coefficient n is not within the preset interval, the step of adjusting the opening degree of the throttling device according to the interval where the wind-side coefficient n is located so that the wind-side coefficient n is within the preset interval further includes: when the wind side coefficient n is not in the preset interval, continuously judging whether the wind side coefficient n is smaller than the minimum value of the preset interval; and when the wind side coefficient n is smaller than the minimum value of the preset interval, controlling the throttling device to close the second preset opening degree every third preset time, and returning to continuously judge whether the wind side coefficient n is in the preset interval.
In the technical scheme, when the wind side coefficient n is judged not to be in the preset interval, whether the wind side coefficient n is larger than the maximum value of the preset interval or not is continuously judged, when the wind side coefficient n is larger than the maximum value of the preset interval, the throttling device is controlled to be opened by a second preset opening degree, and after a third preset time, when the wind side coefficient n is still larger than the maximum value of the preset interval, the throttling device is continuously controlled to be opened by a first preset opening degree.
According to a second aspect of the present invention, the present invention provides a throttling control device for an air conditioning system, the air conditioning system including an outdoor unit, the outdoor unit including an outdoor unit ambient temperature sensor, a compressor discharge temperature sensor, an outdoor heat exchanger discharge temperature sensor, an outdoor condenser refrigerant pressure sensor, and a throttling device, the throttling control device comprising: the detection unit is used for detecting the exhaust temperature Tp of the compressor, the outdoor environment temperature Th, any one of the outlet refrigerant pressure P of the condenser, the inlet refrigerant pressure of the condenser and the exhaust pressure of the compressor, and the air outlet temperature Tf of the outdoor condenser in real time; the timing unit is used for recording the running time of the compressor; the first judgment unit is used for judging whether the running time reaches a first preset time or not; and the first control unit is used for controlling the throttling device to work according to the exhaust temperature Tp of the compressor when the first judgment unit judges that the running time does not reach the first preset time, and controlling the throttling device to work according to the wind side coefficient n when the first judgment unit judges that the running time reaches the first preset time.
The throttle control device of the air conditioning system records the running time of the compressor after the air conditioner is started, and controls the throttle device to work according to the exhaust temperature Tp of the compressor when the running time of the compressor does not reach the first preset time; when the running time of the compressor reaches a first preset time, the throttle device is controlled to work according to the wind side coefficient n, then the throttle device of the air conditioner is automatically adjusted, in addition, the throttle device is reasonably optimized according to the exhaust temperature Tp of the compressor and the wind side coefficient n, the opening degree of the automatic control throttle device is formed, in addition, the opening degree of the throttle device is adjusted according to the actual running condition of the air conditioner in real time, the air conditioning system is always in the best refrigerant circulation quantity, 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 the above technical solution, preferably, the method further includes: a second judgment unit for judging whether the compressor discharge temperature Tp is in the rising section or the falling section according to the change condition of the compressor discharge temperature Tp detected by the detection unit in the operation time; and a second control unit for controlling the opening degree of the throttle device to be gradually increased when the second judgment unit judges that the compressor discharge temperature Tp is in the rising section, and controlling the opening degree of the throttle device to be gradually decreased when the second judgment unit judges that the compressor discharge temperature Tp is in the falling section.
In the technical scheme, when the running time does not reach the preset time, judging whether the compressor exhaust temperature Tp is in an ascending interval or a descending interval according to the change condition of the compressor exhaust temperature Tp in the running time, and when the compressor exhaust temperature Tp is in the ascending interval, gradually increasing the opening degree of the throttling device; when the compressor discharge temperature Tp is in the fall interval, the opening degree of the throttle device is gradually decreased. For example: the exhaust temperature Tp of the compressor is increased from 60 degrees to 80 degrees, and the opening degree of the throttling device is gradually increased; the discharge temperature Tp of the compressor is reduced from 70 degrees to 50 degrees, and the opening degree of the throttling device is gradually reduced.
In any of the above technical solutions, preferably, the method further includes: the calculating unit is used for calculating a wind side coefficient n; the third judging unit is used for judging whether the wind side coefficient n is in a preset interval or not; and the third control unit is used for controlling the throttling device to work according to the exhaust temperature Tp of the compressor when the third judging unit judges that the wind-side coefficient n is within the preset interval, and adjusting the opening degree of the throttling device according to the interval where the wind-side coefficient n is located when the third judging unit judges that the wind-side coefficient n is not within the preset interval so as to enable the wind-side coefficient n to be within the preset interval.
In the technical scheme, the air side coefficient n is calculated, and whether the air side coefficient n is in a preset interval is judged, wherein when the air side coefficient n is in the preset interval, the throttle device is controlled to work according to the exhaust temperature Tp of the compressor, and when the air side coefficient n is not in the preset interval, the opening degree of the throttle device is adjusted according to the interval where the air side coefficient n is located, so that the air side coefficient n is in the preset interval, and the optimal refrigerant circulation quantity is obtained.
In any one of the above technical solutions, preferably, the calculating unit is configured to calculate a wind-side coefficient n, and specifically includes: 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; according to the formula: and (Tf-Th)/(Tb-Th), and calculating the wind side coefficient n.
In the technical scheme, a 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 compressor exhaust pressure, and then the formula is used for: 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 opening of the throttling device.
In any of the above technical solutions, preferably, the method further includes: the fourth judging unit is used for continuously judging whether the wind side coefficient n is larger than the maximum value of the preset interval or not when the third judging unit judges that the wind side coefficient n is not in the preset interval; and the fourth control unit is used for controlling the throttling device to be opened by the first preset opening degree every second preset time when the fourth judging unit judges that the wind side coefficient n is greater than the maximum value of the preset interval, and the second judging unit judges whether the wind side coefficient n is in the preset interval again.
In the technical scheme, when the wind side coefficient n is judged not to be in the preset interval, whether the wind side coefficient n is smaller than the minimum value of the preset interval or not is continuously judged, when the wind side coefficient n is smaller than the minimum value of the preset interval, the throttling device is controlled to be turned off by the first preset opening degree, and after the second preset time, when the wind side coefficient n is still smaller than the minimum value of the preset interval, the throttling device is continuously controlled to be turned off by the first preset opening degree.
In any of the above technical solutions, preferably, the method further includes: the fifth judging unit is used for judging whether the wind side coefficient n is smaller than the minimum value of the preset interval or not when the fourth judging unit judges that the wind side coefficient n is not in the preset interval; and the fifth control unit is used for controlling the throttling device to reduce the second preset opening degree every third preset time when the fifth judging unit judges that the wind side coefficient n is smaller than the minimum value of the preset interval, and the second judging unit judges whether the wind side coefficient n is in the preset interval again.
In the technical scheme, when the wind side coefficient n is judged not to be in the preset interval, whether the wind side coefficient n is larger than the maximum value of the preset interval or not is continuously judged, when the wind side coefficient n is larger than the maximum value of the preset interval, the throttling device is controlled to be opened by a second preset opening degree, and after a third preset time, when the wind side coefficient n is still larger than the maximum value of the preset interval, the throttling device is continuously controlled to be opened by a first preset opening degree.
According to a third aspect of the present invention, there is provided an air conditioner including: the throttle control device of an air conditioning system according to any one of the above aspects.
The air conditioner provided by the invention comprises the throttle control device of the air conditioning system according to any one of the above technical solutions, so that all the beneficial effects of the throttle control device of the air conditioning system according to any one of the above technical solutions are achieved, and the description 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 throttle control method of an air conditioning system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a throttle control method of an air conditioning system according to another embodiment of the present invention;
FIG. 3 is a flow chart illustrating a method for throttle control of an air conditioning system according to another embodiment of the present invention;
FIG. 4 is a schematic block diagram of a throttle control apparatus of an air conditioning system according to an embodiment of the present invention;
FIG. 5 is a schematic block diagram of a throttle control apparatus of an air conditioning system according to another embodiment of the present invention;
fig. 6 is a schematic block diagram illustrating a throttle control apparatus of an air conditioning system according to another embodiment of the present invention;
fig. 7 is a schematic diagram illustrating a control logic of a throttle device according to exhaust gas temperature adjustment in a throttle control device 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 throttle control method of an air conditioning system according to an embodiment of the present invention.
As shown in fig. 1, a throttle control method of an air conditioning system according to an embodiment of the present invention includes:
step 102: detecting the exhaust temperature Tp and the outdoor environment temperature Th of the compressor, any one of the outlet refrigerant pressure P of the condenser, the inlet refrigerant pressure of the condenser and the exhaust pressure of the compressor, and the outlet air temperature Tf of the outdoor condenser in real time;
step 104: recording the running time of the compressor;
step 106: judging whether the running time reaches a first preset time, if not, executing the step 108, and if so, executing the step 110;
step 108: controlling the throttle device to work according to the exhaust temperature Tp of the compressor;
step 110: and controlling the throttle device to work according to the wind side coefficient n.
The throttle control method of the air conditioning system provided by the invention records the running time of the compressor after the air conditioner is started, and controls the throttle device to work according to the exhaust temperature Tp of the compressor when the running time of the compressor does not reach the first preset time; when the running time of the compressor reaches a first preset time, the throttle device is controlled to work according to the wind side coefficient n, then the throttle device of the air conditioner is automatically adjusted, in addition, the throttle device is reasonably optimized according to the exhaust temperature Tp of the compressor and the wind side coefficient n, the opening degree of the automatic control throttle device is formed, in addition, the opening degree of the throttle device is adjusted according to the actual running condition of the air conditioner in real time, the air conditioning system is always in the best refrigerant circulation quantity, 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.
According to the throttle control method of the air conditioning system, on the basis of ensuring the reliable operation of the air conditioning system, the air conditioning system is optimized through the control logic of the wind side coefficient n and the exhaust temperature Tp of the compressor, the operation efficiency of a unit is greatly improved, the comfort of a user in the use process is improved, and the dual requirements of energy development and market development are met.
Fig. 2 is a flowchart illustrating a throttle control method of an air conditioning system according to another embodiment of the present invention.
As shown in fig. 2, another embodiment of the present invention provides a throttle control method for an air conditioning system, including:
step 202: detecting the exhaust temperature Tp and the outdoor environment temperature Th of the compressor, any one of the outlet refrigerant pressure P of the condenser, the inlet refrigerant pressure of the condenser and the exhaust pressure of the compressor, and the outlet air temperature Tf of the outdoor condenser in real time;
step 204: recording the running time of the compressor;
step 206: judging whether the running time reaches a first preset time, if not, executing the step 208, and if so, executing the step 214;
step 208: judging whether the compressor exhaust temperature Tp is in an ascending interval or a descending interval according to the change condition of the compressor exhaust temperature Tp in the running time;
step 210: when the compressor discharge temperature Tp is in the rising interval, controlling the opening degree of the throttling device to gradually increase;
step 212: when the compressor discharge temperature Tp is in a descending interval, controlling the opening degree of the throttling device to gradually reduce;
step 214: calculating a wind side coefficient n;
step 216: judging whether the wind side coefficient n is in a preset interval, if so, executing the step 208, and if not, executing the step 218;
step 218: and adjusting the opening of the throttling device according to the interval where the wind side coefficient n is located, and then, re-executing the step 216 to re-judge whether the wind side coefficient n is in the preset interval.
The throttle control method of the air conditioning system provided by the invention records the running time of the compressor after the air conditioner is started, judges whether the compressor exhaust temperature Tp is in an ascending interval or a descending interval according to the change condition of the compressor exhaust temperature Tp in the running time when the running time of the compressor does not reach the first preset time, and gradually increases the opening degree of the throttle device when the compressor exhaust temperature Tp is in the ascending interval; when the compressor discharge temperature Tp is in a descending interval, the opening degree of the throttling device is gradually reduced; when the running time of the compressor reaches a first preset time, the throttle device is controlled to work according to the wind side coefficient n, then the throttle device of the air conditioner is automatically adjusted, in addition, the throttle device is reasonably optimized according to the exhaust temperature Tp of the compressor and the wind side coefficient n, the opening degree of the automatic control throttle device is formed, in addition, the opening degree of the throttle device is adjusted according to the actual running condition of the air conditioner in real time, the air conditioning system is always in the best refrigerant circulation quantity, 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 throttle control method of an air conditioning system according to another embodiment of the present invention.
As shown in fig. 3, another embodiment of the present invention provides a throttle control method for an air conditioning system, including:
step 302: detecting the exhaust temperature Tp and the outdoor environment temperature Th of the compressor, any one of the outlet refrigerant pressure P of the condenser, the inlet refrigerant pressure of the condenser and the exhaust pressure of the compressor, and the outlet air temperature Tf of the outdoor condenser in real time;
step 304: recording the running time of the compressor;
step 306: judging whether the running time reaches a first preset time, if not, executing the step 308, and if so, executing the step 314;
step 308: judging whether the compressor exhaust temperature Tp is in an ascending interval or a descending interval according to the change condition of the compressor exhaust temperature Tp in the running time;
step 310: when the compressor discharge temperature Tp is in the rising interval, controlling the opening degree of the throttling device to gradually increase;
step 312: when the compressor discharge temperature Tp is in a descending interval, controlling the opening degree of the throttling device to gradually reduce;
step 314: 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; according to the formula: n is (Tf-Th)/(Tb-Th), and calculating a wind side coefficient n;
step 316: judging whether the wind side coefficient n is in a preset interval, if so, executing the step 308, and if not, executing the step 318;
step 318: continuously judging whether the wind side coefficient n is smaller than the minimum value of the preset interval, if so, executing step 320, and if not, executing step 322;
step 320: controlling the throttling device to close the first preset opening degree every second preset time, and then re-executing the step 316 to re-judge whether the wind side coefficient n is within the preset interval;
step 322: and controlling the throttling device to be opened by a second preset opening degree every third preset time, and then, executing the step 316 again to judge whether the wind side coefficient n is within the preset interval again.
The throttle control method of the air conditioning system provided by the invention records the running time of the compressor after the air conditioner is started, judges whether the compressor exhaust temperature Tp is in an ascending interval or a descending interval according to the change condition of the compressor exhaust temperature Tp in the running time when the running time of the compressor does not reach the first preset time, and gradually increases the opening degree of the throttle device when the compressor exhaust temperature Tp is in the ascending interval; when the compressor discharge temperature Tp is in a descending interval, the opening degree of the throttling device is gradually reduced; when the running time of the compressor reaches a first preset time, 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, and then obtaining the saturation temperature Tb by using a formula: when the air side coefficient n is in a preset interval, judging whether the compressor exhaust temperature Tp is in a rising interval or a falling interval according to the change condition of the compressor exhaust temperature Tp in the operation time, and when the compressor exhaust temperature Tp is in the rising interval, gradually increasing the opening of the throttling device; when the compressor discharge temperature Tp is in a descending interval, the opening degree of the throttling device is gradually reduced; when the wind side coefficient n is judged not to be in the preset interval, continuously judging whether the wind side coefficient n is smaller than the minimum value of the preset interval or not, controlling the throttling device to reduce the first preset opening degree when the wind side coefficient n is smaller than the minimum value of the preset interval, and continuously controlling the throttling device to reduce the first preset opening degree when the wind side coefficient n is still smaller than the minimum value of the preset interval after the second preset time; and when the wind side coefficient n is not in the preset interval, continuously judging whether the wind side coefficient n is larger than the maximum value of the preset interval or not, controlling the throttling device to be opened by a second preset opening degree when the wind side coefficient n is larger than the maximum value of the preset interval, and continuously controlling the throttling device to be opened by a first preset opening degree when the wind side coefficient n is still larger than the maximum value of the preset interval after third preset time.
In a specific embodiment, the throttling device is an electronic expansion valve, and when the electronic expansion valve enters an adjusting mode according to the discharge temperature Tp of the compressor, and when the discharge temperature is in a process of rising from low to high, the opening degree of the electronic expansion valve is gradually increased, for example: when the exhaust temperature is increased from T1 to T3, the opening degree of the electronic expansion valve is changed from A to B, when the exhaust temperature is increased from T3 to T5, the opening degree of the electronic expansion valve is changed from B to C, when the exhaust temperature is increased from T3 to T5, the opening degree of the electronic expansion valve is changed from C to D, when the exhaust temperature is increased from T5 to T7, the opening degree of the electronic expansion valve is changed from D to E; when the exhaust temperature is in the process from high to low, the opening degree of the electronic expansion valve is gradually reduced. For example: when the exhaust temperature is reduced from T8 to T6, the opening degree of the electronic expansion valve is reduced from D to C, when the exhaust temperature is reduced from T6 to T4, the opening degree of the electronic expansion valve is reduced from C to B, and when the exhaust temperature is reduced from T4 to T2, the opening degree of the electronic expansion valve is reduced from B to A. Wherein, the opening degree of the electronic expansion valve: a is more than B, more than C and more than D, and less than E; temperature: t1 < T3 < T5 < T7; temperature: t2 < T4 < T6 < T8.
In a specific embodiment, it may be determined that the wind-side coefficient n is greater than the maximum value of the preset interval, or that the wind-side coefficient n is less than the minimum value of the preset interval, and it should be noted herein that there are three possibilities for the relationship between the wind-side coefficient n and the preset interval, that is, the wind-side coefficient n is within the preset interval, the wind-side coefficient n is greater than the maximum value of the preset interval, and the wind-side coefficient n is less than the minimum value of the preset interval, so that when the wind-side coefficient n is not within the preset interval, and it is determined that the wind-side coefficient n is greater than the maximum value of the preset interval when the wind-side coefficient n is not less than the minimum value of the preset interval, the control of the throttling device may be implemented without further determining the wind-side coefficient n; correspondingly, when the wind-side coefficient n is judged not to be larger than the maximum value of the preset interval, the wind-side coefficient n is judged to be smaller than the minimum value of the preset interval, so that the control of the throttling device can be realized without further judgment on the wind-side coefficient n.
In a specific embodiment, when the starting running time of an air conditioner compressor is more than 30 minutes, the automatic calculation and judgment logic of the wind side coefficient n is entered; according to the related art, a saturation temperature Tb corresponding to any one of a condenser outlet refrigerant pressure P, a condenser inlet refrigerant pressure, and a compressor discharge pressure is automatically calculated, and a current wind-side coefficient n is calculated, where the wind-side coefficient n is (outdoor condenser outlet air temperature Tf — outdoor ambient temperature Th) ÷ (saturation temperature Tb — outdoor ambient temperature Th corresponding to the current refrigerant pressure), that is, n is (Tf-Th)/(Tb-Th).
Further, it is determined whether or not the air-side coefficient n is satisfied, and if so, the electronic expansion valve continues to adjust the opening degree according to the compressor discharge temperature Tp.
If the wind side coefficient n is not satisfied, further judging whether n is larger than b, if so, opening the electronic expansion valve by x steps, and adjusting the electronic expansion valve once every several minutes; if not, further judging whether n < a is established, if so, closing the electronic expansion valve by x steps, and adjusting once every several minutes. Where a and b may be any constant.
As shown in fig. 4, according to a second aspect of the present invention, the present invention provides a throttle control apparatus 400 of 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 temperature sensor, an outdoor heat exchanger and an outdoor heat exchanger discharge temperature sensor, an outdoor condenser refrigerant pressure sensor, and a throttle apparatus, including: the detection unit 402 is used for detecting the exhaust temperature Tp of the compressor, the outdoor environment temperature Th, the refrigerant pressure P at the outlet of the condenser and the air outlet temperature Tf of the outdoor condenser in real time; a timing unit 404 for recording the operation time of the compressor; a first judging unit 406, configured to judge whether the running time reaches a first preset time; the first control unit 408 is used for controlling the throttle device to work according to the exhaust temperature Tp of the compressor when the first judging unit 406 judges that the running time does not reach the first preset time; and when the first judging unit 406 judges that the running time reaches the first preset time, controlling the throttle device to work according to the wind side coefficient n.
The throttle control device 400 of the air conditioning system records the running time of the compressor after the air conditioner is started, and controls the throttle device to work according to the exhaust temperature Tp of the compressor when the running time of the compressor does not reach the first preset time; when the running time of the compressor reaches a first preset time, the throttle device is controlled to work according to the wind side coefficient n, then the throttle device of the air conditioner is automatically adjusted, in addition, the throttle device is reasonably optimized according to the exhaust temperature Tp of the compressor and the wind side coefficient n, the opening degree of the automatic control throttle device is formed, in addition, the opening degree of the throttle device is adjusted according to the actual running condition of the air conditioner in real time, the air conditioning system is always in the best refrigerant circulation quantity, 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 another embodiment of the present invention, as shown in fig. 5, the present invention provides a throttle control device 500 of 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 temperature sensor, an outdoor heat exchanger and an outdoor heat exchanger discharge temperature sensor, an outdoor condenser refrigerant pressure sensor, and a throttle device, including: the detection unit 502 is used for detecting the exhaust temperature Tp of the compressor, the outdoor environment temperature Th, the refrigerant pressure P at the outlet of the condenser and the air outlet temperature Tf of the outdoor condenser in real time; a timing unit 504 for recording the operation time of the compressor; a first determining unit 506, configured to determine whether the running time reaches a first preset time; the first control unit 508, is used for when the first judging unit 506 judges the run time does not reach the first preset time, control the work of the throttling set according to the compressor discharge temperature Tp; when the first judging unit 506 judges that the running time reaches a first preset time, controlling the throttle device to work according to a wind side coefficient n; a second determination unit 510, configured to determine whether the compressor discharge temperature Tp is in the rising section or the falling section according to a change of the compressor discharge temperature Tp detected by the detection unit 502 during the operation time; a second control unit 512 for controlling the opening degree of the throttle device to gradually increase when the second judgment unit 510 judges that the compressor discharge temperature Tp is in the rising section; when the second judgment unit 510 judges that the compressor discharge temperature Tp is in the falling section, the opening degree of the throttle device is controlled to be gradually decreased.
The throttle control method of the air conditioning system provided by the invention records the running time of the compressor after the air conditioner is started, judges whether the compressor exhaust temperature Tp is in an ascending interval or a descending interval according to the change condition of the compressor exhaust temperature Tp in the running time when the running time of the compressor does not reach the first preset time, and gradually increases the opening degree of the throttle device when the compressor exhaust temperature Tp is in the ascending interval; when the compressor discharge temperature Tp is in a descending interval, the opening degree of the throttling device is gradually reduced; when the running time of the compressor reaches a first preset time, the throttle device is controlled to work according to the wind side coefficient n, then the throttle device of the air conditioner is automatically adjusted, in addition, the throttle device is reasonably optimized according to the exhaust temperature Tp of the compressor and the wind side coefficient n, the opening degree of the automatic control throttle device is formed, in addition, the opening degree of the throttle device is adjusted according to the actual running condition of the air conditioner in real time, the air conditioning system is always in the best refrigerant circulation quantity, 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 another embodiment of the present invention, as shown in fig. 6, the present invention provides a throttle control device 600 of 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 temperature sensor, an outdoor heat exchanger and an outdoor heat exchanger discharge temperature sensor, an outdoor condenser refrigerant pressure sensor, and a throttle device, including: the detection unit 602 is configured to detect, in real time, a discharge temperature Tp of the compressor, an outdoor environment temperature Th, a refrigerant pressure P at an outlet of the condenser, and an outlet air temperature Tf of the outdoor condenser; a timing unit 604 for recording the operation time of the compressor; a first judging unit 606, configured to judge whether the running time reaches a first preset time; the first control unit 608 is used for controlling the throttle device to work according to the compressor exhaust temperature Tp when the first judging unit 606 judges that the running time does not reach the first preset time; when the first judging unit 606 judges that the running time reaches a first preset time, the throttling device is controlled to work according to a wind side coefficient n; a second determination unit 610, configured to determine whether the compressor discharge temperature Tp is in the rising section or the falling section according to a change of the compressor discharge temperature Tp detected by the detection unit 602 during the operation time; a second control unit 612 for controlling the opening degree of the throttle device to gradually increase when the second judgment unit 610 judges that the compressor discharge temperature Tp is in the rising section; when the second judging unit 610 judges that the compressor discharge temperature Tp is in the falling interval, the opening degree of the throttling device is controlled to be gradually reduced; a calculating unit 614, configured to calculate a wind-side coefficient n; a third determining unit 616, configured to determine whether the wind-side coefficient n is within a preset interval; a third control unit 618, configured to control the operation of the throttling device according to the compressor discharge temperature Tp when the third determining unit 616 determines that the wind-side coefficient n is within the preset range; when the third determining unit 616 determines that the wind-side coefficient n is not within the preset interval, the opening degree of the throttling device is adjusted according to the interval where the wind-side coefficient n is located, so that the wind-side coefficient n is within the preset interval; the calculating unit 614 is configured to calculate a wind-side coefficient n, and specifically includes: 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; according to the formula: calculating a wind side coefficient n (air outlet temperature Tf of an outdoor condenser-outdoor environment temperature Th) and (saturation temperature Tb-outdoor environment temperature Th corresponding to the current refrigerant pressure); a fourth determining unit 620, configured to determine whether the wind-side coefficient n is smaller than the minimum value of the preset interval when the third determining unit 616 determines that the wind-side coefficient n is not within the preset interval; a fourth control unit 622, configured to control the throttling device to close the first preset opening every second preset time when the fourth determining unit 620 determines that the wind-side coefficient n is smaller than the minimum value of the preset interval, and the third determining unit 616 determines whether the wind-side coefficient n is within the preset interval again; a fifth judging unit 624, configured to, when the fourth judging unit 620 judges that the wind-side coefficient n is not within the preset interval, continuously judge whether the wind-side coefficient n is greater than the preset interval maximum value; a fifth control unit 626, configured to, when the fifth determining unit 624 determines that the wind-side coefficient n is greater than the maximum value of the preset interval, control the throttling device to open by the second preset opening degree every third preset time, and the third determining unit 616 determines whether the wind-side coefficient n is within the preset interval again.
The throttle control method of the air conditioning system provided by the invention records the running time of the compressor after the air conditioner is started, judges whether the compressor exhaust temperature Tp is in an ascending interval or a descending interval according to the change condition of the compressor exhaust temperature Tp in the running time when the running time of the compressor does not reach the first preset time, and gradually increases the opening degree of the throttle device when the compressor exhaust temperature Tp is in the ascending interval; when the compressor discharge temperature Tp is in a descending interval, the opening degree of the throttling device is gradually reduced; when the running time of the compressor reaches a first preset time, 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, and then obtaining the saturation temperature Tb by using a formula: when the air side coefficient n is in a preset interval, judging whether the compressor exhaust temperature Tp is in an ascending interval or a descending interval according to the change condition of the compressor exhaust temperature Tp in the running time, and when the compressor exhaust temperature Tp is in the ascending interval, gradually increasing the opening of the throttling device; when the compressor discharge temperature Tp is in a descending interval, the opening degree of the throttling device is gradually reduced; when the wind side coefficient n is judged not to be in the preset interval, continuously judging whether the wind side coefficient n is smaller than the minimum value of the preset interval or not, controlling the throttling device to reduce the first preset opening degree when the wind side coefficient n is smaller than the minimum value of the preset interval, and continuously controlling the throttling device to reduce the first preset opening degree when the wind side coefficient n is still smaller than the minimum value of the preset interval after the second preset time; and when the wind side coefficient n is not in the preset interval, continuously judging whether the wind side coefficient n is larger than the maximum value of the preset interval or not, controlling the throttling device to be opened by a second preset opening degree when the wind side coefficient n is larger than the maximum value of the preset interval, and continuously controlling the throttling device to be opened by a first preset opening degree when the wind side coefficient n is still larger than the maximum value of the preset interval after third preset time.
In a specific embodiment, the value range of the preset interval may be greater than or equal to 0.1 and less than or equal to 2; the value range of the first preset opening degree can be more than or equal to 5 steps and less than or equal to 40 steps; the value range of the second preset opening degree can be more than or equal to 5 steps and less than or equal to 40 steps; the value range of the first preset time can be more than or equal to 1 minute and less than or equal to 60 minutes; the value range of the second preset time can be more than or equal to 1 minute and less than or equal to 30 minutes; the value range of the third preset time may be greater than or equal to 1 minute and less than or equal to 30 minutes.
In a specific embodiment, the throttling device is an electronic expansion valve, and as shown in fig. 7, when the electronic expansion valve enters the regulation mode according to the discharge temperature Tp of the compressor, the logic for controlling the operation of the electronic expansion valve is that, when the discharge temperature is in the process of rising from low to high, the opening degree of the electronic expansion valve is gradually increased, for example: when the exhaust temperature is increased from T1 to T3, the opening degree of the electronic expansion valve is changed from A to B, when the exhaust temperature is increased from T3 to T5, the opening degree of the electronic expansion valve is changed from B to C, when the exhaust temperature is increased from T3 to T5, the opening degree of the electronic expansion valve is changed from C to D, when the exhaust temperature is increased from T5 to T7, the opening degree of the electronic expansion valve is changed from D to E; when the exhaust temperature is in the process from high to low, the opening degree of the electronic expansion valve is gradually reduced. For example: when the exhaust temperature is reduced from T8 to T6, the opening degree of the electronic expansion valve is reduced from D to C, when the exhaust temperature is reduced from T6 to T4, the opening degree of the electronic expansion valve is reduced from C to B, and when the exhaust temperature is reduced from T4 to T2, the opening degree of the electronic expansion valve is reduced from B to A. Wherein, the opening degree of the electronic expansion valve: a is more than B, more than C and more than D, and less than E; temperature: t1 < T3 < T5 < T7; temperature: t2 < T4 < T6 < T8.
In a specific embodiment, it may be determined that the wind-side coefficient n is greater than the maximum value of the preset interval, or that the wind-side coefficient n is less than the minimum value of the preset interval, and it should be noted herein that there are three possibilities for the relationship between the wind-side coefficient n and the preset interval, that is, the wind-side coefficient n is within the preset interval, the wind-side coefficient n is greater than the maximum value of the preset interval, and the wind-side coefficient n is less than the minimum value of the preset interval, so that when the wind-side coefficient n is not within the preset interval, and it is determined that the wind-side coefficient n is greater than the maximum value of the preset interval when the wind-side coefficient n is not less than the minimum value of the preset interval, the control of the throttling device may be implemented without further determining the wind-side coefficient n; correspondingly, when the wind-side coefficient n is judged not to be larger than the maximum value of the preset interval, the wind-side coefficient n is judged to be smaller than the minimum value of the preset interval, so that the control of the throttling device can be realized without further judgment on the wind-side coefficient n.
In a specific embodiment, when the starting running time of an air conditioner compressor is more than 30 minutes, the automatic calculation and judgment logic of the wind side coefficient n is entered; according to the related art, a saturation temperature Tb corresponding to any one of a condenser outlet refrigerant pressure P, a condenser inlet refrigerant pressure, and a compressor discharge pressure is automatically calculated, and then a current wind-side coefficient n is calculated, where the wind-side coefficient n is (outdoor condenser outlet air temperature Tf — outdoor ambient temperature Th) ÷ (saturation temperature Tb — outdoor ambient temperature Th corresponding to the current refrigerant pressure), that is, n is (Tf-Th)/(Tb-Th).
Further, it is determined whether or not the air-side coefficient n is satisfied, and if so, the electronic expansion valve continues to adjust the opening degree according to the compressor discharge temperature Tp.
If the wind side coefficient n is not satisfied, further judging whether n is larger than b, if so, opening the electronic expansion valve by x steps, and adjusting the electronic expansion valve once every several minutes; if not, further judging whether n < a is established, if so, closing the electronic expansion valve by x steps, and adjusting once every several minutes. Wherein a and b can be any constant, and x is any value.
According to a third aspect of embodiments of the present invention, there is provided an air conditioner including: the throttle control device of an air conditioning system according to any of the embodiments described above.
The air conditioner provided by the invention comprises the throttling control device of the air conditioning system provided by any one of the embodiments, so that the air conditioner has all the advantages of the throttling control device of the air conditioning system provided by any one of the embodiments, and the description is omitted.
In summary, according to the throttle control method and device for the air conditioning system and the air conditioner provided by the invention, after the air conditioner is started, the running time of the compressor is recorded, and when the running time of the compressor does not reach the first preset time, the throttle device is controlled to work according to the exhaust temperature Tp of the compressor; when the running time of the compressor reaches a first preset time, the throttle device is controlled to work according to the wind side coefficient n, then the throttle device of the air conditioner is automatically adjusted, in addition, the throttle device is reasonably optimized according to the exhaust temperature Tp of the compressor and the wind side coefficient n, the opening degree of the automatic control throttle device is formed, in addition, the opening degree of the throttle device is adjusted according to the actual running condition of the air conditioner in real time, the air conditioning system is always in the best refrigerant circulation quantity, 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 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 (11)
1. The throttle control method of the air conditioning system comprises an outdoor unit, the outdoor unit comprises an outdoor unit environment temperature sensor, a compressor exhaust temperature sensor, an outdoor heat exchanger air outlet temperature sensor, an outdoor condenser refrigerant pressure sensor and a throttle device, and is characterized in that the throttle control method comprises the following steps:
detecting the exhaust temperature Tp and the outdoor environment temperature Th of the compressor, any one of the outlet refrigerant pressure P of the condenser, the inlet refrigerant pressure of the condenser and the exhaust pressure of the compressor, and the outlet air temperature Tf of the outdoor condenser in real time;
recording the running time of the compressor, and judging whether the running time reaches a first preset time or not;
when the running time does not reach the first preset time, controlling the throttling device to work according to the discharge temperature Tp of the compressor;
when the running time reaches the first preset time, 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;
according to the formula: n = (Tf-Th)/(Tb-Th), and calculating a wind side coefficient n;
and controlling the throttling device to work according to the wind side coefficient n.
2. The throttle control method of an air conditioning system according to claim 1, wherein the step of controlling the operation of the throttle device according to the compressor discharge temperature Tp when the operation time does not reach the preset time specifically comprises:
judging whether the compressor exhaust temperature Tp is in an ascending interval or a descending interval according to the change condition of the compressor exhaust temperature Tp in the running time;
when the compressor discharge temperature Tp is in a rising interval, controlling the opening degree of the throttling device to gradually increase;
and when the compressor discharge temperature Tp is in a descending interval, controlling the opening degree of the throttling device to gradually reduce.
3. The throttle control method of an air conditioning system according to claim 1 or 2, wherein the step of controlling the operation of the throttling device according to a wind side coefficient n when the operation time reaches the preset time specifically comprises:
judging whether the wind side coefficient n is in a preset interval or not;
when the wind side coefficient n is in the preset interval, controlling the throttling device to work according to the exhaust temperature Tp of the compressor;
and when the wind side coefficient n is not in the preset interval, adjusting the opening of the throttling device according to the interval where the wind side coefficient n is located, so that the wind side coefficient n is in the preset interval.
4. The throttle control method of an air conditioning system according to claim 3, wherein the step of adjusting the opening degree of the throttle device according to the interval of the wind-side coefficient n when the wind-side coefficient n is not within the preset interval so that the wind-side coefficient n is within the preset interval specifically comprises:
when the wind side coefficient n is not in the preset interval, continuously judging whether the wind side coefficient n is larger than the maximum value of the preset interval;
and when the wind side coefficient n is larger than the maximum value of the preset interval, controlling the throttling device to be opened by a first preset opening degree every second preset time, and returning to continuously judge whether the wind side coefficient n is in the preset interval.
5. The throttle control method of an air conditioning system according to claim 4, wherein the step of adjusting the opening degree of the throttle device according to the interval of the wind-side coefficient n to make the wind-side coefficient n within the preset interval when the wind-side coefficient n is not within the preset interval further comprises:
when the wind side coefficient n is not in the preset interval, continuously judging whether the wind side coefficient n is smaller than the minimum value of the preset interval;
and when the wind side coefficient n is smaller than the minimum value of the preset interval, controlling the throttling device to close a second preset opening degree every third preset time, and returning to continuously judge whether the wind side coefficient n is in the preset interval.
6. The utility model provides an air conditioning system's throttle control device, air conditioning system includes the off-premises station, the off-premises station includes off-premises station ambient temperature sensor, compressor and compressor exhaust temperature sensor, outdoor heat exchanger and outdoor heat exchanger air-out temperature sensor, outdoor condenser refrigerant pressure sensor to and throttling arrangement, its characterized in that includes:
the detection unit is used for detecting the exhaust temperature Tp of the compressor, the outdoor environment temperature Th, any one of the outlet refrigerant pressure P of the condenser, the inlet refrigerant pressure of the condenser and the exhaust pressure of the compressor, and the air outlet temperature Tf of the outdoor condenser in real time;
the timing unit is used for recording the running time of the compressor;
the first judgment unit is used for judging whether the running time reaches a first preset time or not;
the first control unit is used for controlling the throttling device to work according to the exhaust temperature Tp of the compressor when the first judging unit judges that the running time does not reach the first preset time, and controlling the throttling device to work according to the wind side coefficient n when the first judging unit judges that the running time reaches the first preset time;
the calculating 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 exhaust pressure; and
according to the formula: n = (Tf-Th)/(Tb-Th), the wind side coefficient n is calculated.
7. The throttle control device of an air conditioning system according to claim 6, characterized by further comprising:
a second determination unit configured to determine whether the compressor discharge temperature Tp is in an increasing section or a decreasing section, based on a change in the compressor discharge temperature Tp detected by the detection unit during the operation time;
and a second control unit configured to control the opening degree of the throttle device to be gradually increased when the second determination unit determines that the compressor discharge temperature Tp is in an increasing section, and to control the opening degree of the throttle device to be gradually decreased when the second determination unit determines that the compressor discharge temperature Tp is in a decreasing section.
8. The throttle control device of an air conditioning system according to claim 6 or 7, characterized by further comprising:
the third judging unit is used for judging whether the wind side coefficient n is in a preset interval or not;
and the third control unit is used for controlling the throttling device to work according to the compressor exhaust temperature Tp when the third judging unit judges that the wind side coefficient n is in the preset interval, and adjusting the opening degree of the throttling device according to the interval where the wind side coefficient n is located when the third judging unit judges that the wind side coefficient n is not in the preset interval so as to enable the wind side coefficient n to be in the preset interval.
9. The throttle control device of an air conditioning system according to claim 8, characterized by further comprising:
a fourth judging unit, configured to, when the third judging unit judges that the wind-side coefficient n is not within the preset interval, continuously judge whether the wind-side coefficient n is greater than the maximum value of the preset interval;
and the fourth control unit is used for controlling the throttling device to be opened by a first preset opening degree every second preset time when the fourth judging unit judges that the wind side coefficient n is greater than the maximum value of the preset interval, and the second judging unit judges whether the wind side coefficient n is in the preset interval again.
10. The throttle control device of an air conditioning system according to claim 9, characterized by further comprising:
a fifth judging unit, configured to judge whether the wind-side coefficient n is smaller than the preset interval minimum value when the fourth judging unit judges that the wind-side coefficient n is not within the preset interval;
and the fifth control unit is used for controlling the throttling device to close down by a second preset opening degree every third preset time when the fifth judging unit judges that the wind side coefficient n is smaller than the minimum value of the preset interval, and the second judging unit judges whether the wind side coefficient n is in the preset interval again.
11. An air conditioner, comprising:
the throttle control device of an air conditioning system according to any one of claims 6 to 10.
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| CN109506328B (en) * | 2019-01-22 | 2021-03-19 | 广东美的制冷设备有限公司 | Control method of air conditioner electronic expansion valve and air conditioner |
| CN112833522A (en) * | 2019-11-22 | 2021-05-25 | 三花控股集团有限公司 | Control system and control method thereof |
| CN115264675B (en) * | 2022-04-29 | 2023-11-10 | 佛山市顺德区美的电子科技有限公司 | Air conditioner and control method thereof |
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