CN112728710A - Air conditioner, control system of alternating current variable frequency fan and control method of control system - Google Patents
Air conditioner, control system of alternating current variable frequency fan and control method of control system Download PDFInfo
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- CN112728710A CN112728710A CN202011416872.8A CN202011416872A CN112728710A CN 112728710 A CN112728710 A CN 112728710A CN 202011416872 A CN202011416872 A CN 202011416872A CN 112728710 A CN112728710 A CN 112728710A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses an air conditioner, a control system of an alternating current variable frequency fan and a control method thereof, wherein the control system of the alternating current variable frequency fan comprises the following steps: the detection module, the main control module, the driving module and the alternating current variable frequency motor are sequentially connected; the detection module is used for acquiring a voltage signal corresponding to the pressure value of the refrigerant system and outputting the voltage signal to the main control module; the main control module is used for calculating and outputting a corresponding pressure value according to the voltage signal and outputting a corresponding speed regulating instruction to the driving module according to the pressure value; the driving module is used for driving the alternating current variable frequency motor to rotate according to the speed regulation instruction; the invention can effectively solve the problem that the existing outdoor unit fan system adopting the direct current brushless fan is poor in environmental adaptability, thereby improving the reliability of the whole system.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner, a control system of an alternating current variable frequency fan and a control method of the control system.
Background
The multi-connected air conditioner is an important branch of the air conditioner industry and is widely applied to various medium and large commercial occasions; the outdoor unit fan system of the existing product in the current market adopts the direct-current brushless outer fan, but the direct-current brushless outer fan has poor environmental adaptability, and the reliability of the whole system is reduced.
Thus, the prior art has yet to be improved and enhanced.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide an air conditioner, a control system of an alternating current variable frequency fan and a control method thereof, which can effectively solve the problem that the existing outdoor unit fan system adopting a direct current brushless fan is poor in environmental adaptability, and further improve the reliability of the whole system.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control system of an alternating current variable frequency fan, the system comprising: the detection module, the main control module, the driving module and the alternating current variable frequency motor are sequentially connected;
the detection module is used for acquiring a voltage signal corresponding to a pressure value of a refrigerant system and outputting the voltage signal to the main control module;
the main control module is used for calculating and outputting a corresponding pressure value according to the voltage signal and outputting a corresponding speed regulating instruction to the driving module according to the pressure value;
the driving module is used for driving the alternating current variable frequency motor to rotate according to the speed regulation instruction.
In the control system of the alternating-current variable-frequency fan, when the pressure value is larger than a first preset value, the main control module is used for outputting a first speed regulating instruction to the driving module;
when the pressure value is smaller than a second preset value, the main control module is used for outputting a second speed regulation instruction to the driving module;
when the pressure value is larger than the second preset value and smaller than the first preset value, the main control module outputs a third speed regulating instruction to the driving module;
wherein the first preset value is greater than the second preset value.
In the control system of the alternating current variable frequency fan, the driving module comprises: the communication unit, the control unit and the driving unit are connected in sequence, and the communication unit is connected with the main control module;
the communication unit is used for receiving the speed regulating instruction and outputting the speed regulating instruction to the control unit;
the control unit is used for outputting a driving signal to the driving unit according to the speed regulating instruction;
and the driving unit drives the alternating current variable frequency motor to rotate at a rotating speed corresponding to the driving signal according to the driving signal.
In the control system of the alternating-current variable-frequency fan, when the speed regulation instruction is the first speed regulation instruction, the control unit is used for outputting a first driving signal to the driving unit according to the first speed regulation instruction, and the driving unit is used for increasing a preset value according to the rotating speed of the alternating-current variable-frequency motor driven by the first driving signal;
when the speed regulating instruction is the second speed regulating instruction, the control unit is used for outputting a second driving signal to the driving unit according to the second speed regulating instruction, and the driving unit is used for driving the rotating speed of the alternating current variable frequency motor to reduce a preset value according to the second driving signal;
and when the speed regulating instruction is the third speed regulating instruction, the control unit is used for outputting a third driving signal to the driving unit according to the third speed regulating instruction, and the driving unit is used for driving the rotating speed of the alternating current variable frequency motor to be unchanged according to the third driving signal.
In the control system of the ac variable frequency fan, the driving module further includes: the rectifier unit is respectively connected with the switch unit, the control unit and the drive unit, the switch unit is respectively connected with an alternating current power supply, the switch power supply unit and the control unit, and the switch power supply unit is respectively connected with the alternating current power supply and the control unit;
the switch unit is used for switching on or off according to a switch signal of the control unit;
the rectifying unit is used for rectifying alternating current input by the alternating current power supply and then outputting direct current to supply power to the driving unit when the switching unit is switched on;
the switching power supply unit is used for providing electric energy for the control unit according to the alternating current.
In the control system of the alternating current variable frequency fan, the detection module comprises: the pressure sensor is connected with the main control module and used for detecting the pressure value of the refrigerant system and converting the pressure value of the refrigerant system into a voltage signal to be output to the main control module.
A control method of an alternating current variable frequency fan can be a control method based on the control system of the alternating current variable frequency fan, wherein the control system of the alternating current variable frequency fan comprises a detection module, a main control module, a driving module and an alternating current variable frequency motor which are sequentially connected, and the method comprises the following steps:
acquiring a voltage signal corresponding to a pressure value of a refrigerant system based on the detection module, and outputting the voltage signal to a main control module;
calculating and outputting a corresponding pressure value according to the voltage signal based on the main control module, and outputting a corresponding speed regulating instruction to a driving module according to the pressure value;
and driving the alternating current variable frequency motor to rotate according to the speed regulation instruction based on the driving module.
In the control method, the step of calculating and outputting the corresponding pressure value according to the voltage signal based on the main control module and outputting the corresponding speed regulation instruction to the driving module according to the magnitude of the pressure value specifically comprises the following steps:
outputting a first speed regulation instruction to the driving module based on the main control module when the pressure value is greater than a first preset value;
outputting a second speed regulation instruction to the driving module based on the main control module when the pressure value is smaller than a second preset value;
outputting a third speed regulating instruction to the driving module based on the fact that the main control module outputs a third speed regulating instruction when the pressure value is larger than the second preset value and smaller than the first preset value;
wherein the first preset value is greater than the second preset value.
In the control method, the driving module includes: the communication unit, the control unit and the driving unit are connected in sequence; the step of driving the alternating current variable frequency motor to rotate according to the speed regulation instruction based on the driving module comprises the following steps of:
receiving the speed regulating instruction based on the communication unit and outputting the speed regulating instruction to the control unit;
outputting a driving signal to a driving unit based on the control unit according to the speed regulating instruction;
and driving the alternating current variable frequency motor to rotate at a rotating speed corresponding to the driving signal based on the driving unit according to the driving signal.
An air conditioner comprises the control system of the alternating current variable frequency fan.
Compared with the prior art, the control system of the air conditioner and the alternating current variable frequency fan and the control method thereof provided by the invention have the advantages that the control system of the alternating current variable frequency fan comprises a detection module, a main control module, a driving module and an alternating current variable frequency motor, wherein the detection module, the main control module, the driving module and the alternating current variable frequency motor are sequentially connected; the detection module is used for acquiring a voltage signal corresponding to the pressure value of the refrigerant system and outputting the voltage signal to the main control module; the main control module is used for calculating and outputting a corresponding pressure value according to the voltage signal and outputting a corresponding speed regulating instruction to the driving module according to the pressure value; the driving module is used for driving the alternating current variable frequency motor to rotate according to the speed regulation instruction; the invention can effectively solve the problem that the existing outdoor unit fan system adopting the direct-current brushless fan is poor in environmental adaptability, thereby improving the reliability of the whole system.
Drawings
Fig. 1 is a block diagram of a control system of an ac variable frequency fan according to the present invention;
fig. 2 is a schematic circuit diagram of a driving module in a control system of an ac variable frequency fan according to the present invention;
FIG. 3 is a flow chart of a control method of the control system of the AC variable frequency fan provided by the invention;
fig. 4 is a flowchart of step 300 in the control method of the control system of the ac variable frequency fan according to the present invention;
reference numerals: 10: a detection module; 20: a main control module; 30: a drive module; 40: an AC variable frequency motor; 31: a control unit; 32: a drive unit; 33: a communication unit; 34: a rectifying unit; 35: a switching power supply unit; 36: a switch unit; 37: a display unit.
Detailed Description
In view of the defects of the prior art, the invention aims to provide an air conditioner, a control system of an alternating current variable frequency fan and a control method thereof, which can effectively solve the problem that the existing outdoor unit fan system adopting a direct current brushless fan is poor in environmental adaptability, and further improve the reliability of the whole system.
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the control system of the ac variable frequency fan provided by the present invention includes: the device comprises a detection module 10, a main control module 20, a driving module 30 and an alternating current variable frequency motor 40 which are connected in sequence.
The detection module 10 is configured to obtain a voltage signal corresponding to a pressure value of the refrigerant system, and output the voltage signal to the main control module 20; the main control module 20 is configured to calculate and output a corresponding pressure value according to the voltage signal, and output a corresponding speed regulation instruction to the driving module 30 according to the pressure value; the driving module 30 is used for driving the alternating current variable frequency motor 40 to rotate according to the speed regulation instruction; in this embodiment, the ac variable frequency motor 40 is a low-voltage 220V three-phase ac motor, and compared with the existing three-phase 380V motor, the ac variable frequency motor 40 in this embodiment can autonomously change the motor power to adapt to various stress changes, such as voltage stress, air duct blockage stress, and ambient temperature stress; the open-loop control of the control system of the alternating-current variable-frequency fan is combined, namely the main control module 20 directly controls the rotating speed of the alternating-current variable-frequency motor 40 according to the voltage signal corresponding to the pressure value of the refrigerant system, the control result is not fed back to influence the current control result, the problem that the existing outdoor unit fan system adopting the direct-current brushless fan is poor in environment adaptive capacity is further effectively solved, and the reliability of the whole system is improved.
Specifically, when the pressure value is greater than the first preset value, the main control module 20 is configured to output a first speed regulation instruction to the driving module 30; when the pressure value is smaller than the second preset value, the main control module 20 is configured to output a second speed regulating instruction to the driving module 30; when the pressure value is greater than the second preset value and less than the first preset value, the main control module 20 is configured to output a third speed regulation instruction to the driving module 30; wherein the first preset value is larger than the second preset value; the pressure value of the refrigerant system reflects the heat exchange effect of the current air conditioner, and when the pressure value of the refrigerant system is greater than a first preset value (3.3 Mpa in this embodiment), the heat exchange is insufficient, so that the main control module 20 outputs a first speed regulation instruction to the driving module 30, and correspondingly controls the rotation speed of the alternating current variable frequency motor 40 to be increased; when the pressure value of the refrigerant system is smaller than a second preset value (2.8 Mpa in this embodiment), it indicates that heat exchange is excessive, so that the main control module 20 outputs a second speed regulation instruction to the driving module 30, and correspondingly controls the rotation speed of the ac inverter motor 40 to decrease; when the pressure value of the refrigerant system is greater than the second preset value and less than the first preset value, it indicates that heat exchange is appropriate, so that the main control module 20 outputs a third speed regulation instruction to the driving module 30, and correspondingly controls the rotating speed of the alternating current variable frequency motor 40 to be unchanged, thereby realizing open-loop control of the alternating current variable frequency motor 40.
Further, referring to fig. 2, the driving module 30 includes: a communication unit 33, a control unit 31, and a drive unit 32 connected in this order; the communication unit 33 is configured to receive a speed regulation instruction and output the speed regulation instruction to the control unit 31; the control unit 31 is used for outputting a driving signal to the driving unit 32 according to the speed regulation instruction; the driving unit 32 drives the ac inverter motor 40 to rotate at a rotation speed corresponding to the driving signal according to the driving signal, thereby effectively controlling the ac inverter motor 40.
Further, when the speed regulation instruction is a first speed regulation instruction, the control unit 31 is configured to output a first driving signal to the driving unit 31 according to the first speed regulation instruction, and the driving unit 32 is configured to drive the rotational speed of the ac variable frequency motor 40 to increase a preset value according to the first driving signal; when the speed regulation instruction is a second speed regulation instruction, the control unit 31 is configured to output a second driving signal to the driving unit 32 according to the second speed regulation instruction, and the driving unit 32 is configured to drive the rotational speed of the ac variable frequency motor 40 to reduce the preset value according to the second driving signal; when the speed regulation instruction is a third speed regulation instruction, the control unit 31 is configured to output a third driving signal to the driving unit 32 according to the third speed regulation instruction, and the driving unit 32 is configured to drive the ac variable frequency motor 40 to have a constant rotation speed according to the third driving signal; in the embodiment, the preset value is 15 revolutions per second; that is to say, when the air conditioner heat exchange is insufficient, the main control module 20 outputs a first speed regulation instruction to control the ac inverter motor 40 to increase the rotating speed of 15 rpm, when the air conditioner heat exchange is excessive, the main control module 20 outputs a second speed regulation instruction to control the ac inverter motor 40 to reduce the rotating speed of 15 rpm, and when the air conditioner heat exchange is normal, the main control module 20 outputs a third speed regulation instruction to control the ac inverter motor 40 to maintain the current rotating speed unchanged, thereby realizing effective regulation of the rotating speed of the ac inverter motor.
Specifically, the control unit 31 in the present embodiment includes: the driving unit 32 is an intelligent power module, and the main control module 20 includes a main control chip, which corresponds to the embodiment in which 6 power switching tubes are provided; after receiving the speed regulation instruction of the main control chip through the communication unit 33, the DSP chip outputs the corresponding switching time lengths of the power switching tubes of the driving signal to the driving unit 32 after conversion calculation, and each power switching tube in the driving unit 32 is turned on or turned off according to the corresponding switching time length, thereby realizing driving and adjusting the acceleration and deceleration actions of the ac variable frequency motor 40; the model of the main control chip in this embodiment is MB9BF506N, although chips with the same function may be selected in other embodiments, which is not limited in the present invention.
Further, the control system of the alternating current variable frequency fan further comprises: a rectifying unit 34, a switching power supply unit 35, and a switching unit 36; the rectifying unit 34 is respectively connected with the switching unit 36, the control unit 31 and the driving unit 32, the switching unit 36 is respectively connected with the alternating current power supply, the switching power supply unit 35 and the control unit 31, and the switching power supply unit 35 is respectively connected with the alternating current power supply and the control unit 31; the switching unit 36 is used for being switched on or off according to a switching signal of the control unit 31; the rectifying unit 34 is configured to rectify an ac power input by the ac power supply and output a dc power to power the driving unit 32 when the switching unit 36 is turned on; the switching power supply unit 35 is configured to provide power to the control unit 31 according to alternating current, and the switching unit 36 in this embodiment includes a relay, but components having the same function may be selected in other embodiments, which is not limited in the present invention.
After power-on, the switching power supply unit 35 converts the input alternating current to provide working electric energy for the DSP chip, the DSP chip controls the relay to be turned on after working, then the rectifier unit 34 rectifies the input alternating current and outputs the rectified alternating current to the driving unit 32, and each power switching tube in the driving unit 32 is turned on and off in a certain sequence under the control of the DSP chip, so as to drive the alternating current frequency conversion motor 40 to rotate; the corresponding DSP chip can effectively realize the control of the rotating speed of the alternating current variable frequency motor 40 by controlling the time length of each power switch tube; meanwhile, the DSP chip can detect the power supply voltage output by the rectifying unit 34, and when the power supply voltage is too large, the DSP chip can control the relay to be switched off, so that the rectifying unit 34 stops supplying power for a subsequent circuit, the power utilization safety of the whole system can be ensured, and the reliability of the whole system is further improved.
Further, the driving module 30 further includes a display unit 37, the display unit 37 is connected to the DSP chip, the DSP chip controls the display unit 37 to light up, and displays the current rotation speed of the ac inverter motor 40 and adjusts the rotation speed, so that a user can visually know the rotation speed of the ac inverter motor 40.
Further, the detection module 10 includes a pressure sensor, and the pressure sensor is connected with the main control module 20; the pressure sensor is used for detecting a pressure value of the refrigerant system, converting the pressure value of the refrigerant system into a voltage signal and outputting the voltage signal to the main control module 20; in the embodiment, the pressure sensor adopts a bridge consisting of 4 piezoresistors; the pressure change of the refrigerant system acts on the piezoresistor, the resistor changes along with the pressure change, and after the piezoresistor bridge is switched on, a potential difference is generated, and the potential difference is detected by the main control module 20 and can be converted into a pressure value, so that the rotating speed of the alternating-current variable-frequency motor 40 can be regulated and controlled according to the voltage value.
The position of the motor rotor of the alternating current variable frequency motor 40 does not need to be accurately identified, the adaptability to the rotating speed fluctuation caused by load change is very strong, and the typhoon resistance and the upwind starting capability are super strong; the motor rotor is a passive magnetic field system and is not a direct-current brushless primary magnet rotor, so the EMI performance is excellent; the interference to the power grid and surrounding electronic equipment is low; according to the invention, the AC variable frequency motor 40 is arranged and controlled in an open loop manner, and the self characteristics of the AC variable frequency motor 40 are utilized, so that the environmental adaptability of the whole system can be effectively improved.
Further, the present invention also provides a method for controlling an ac variable frequency fan, where the method regulates and controls a rotation speed of an ac variable frequency motor based on the control system of the ac variable frequency fan, please refer to fig. 4, where the control system of the ac variable frequency fan includes a detection module, a main control module, a driving module, and an ac variable frequency motor, which are connected in sequence, and the method for controlling the control system of the ac variable frequency fan includes the following steps:
s100, acquiring a voltage signal corresponding to a pressure value of a refrigerant system based on the detection module and outputting the voltage signal to a main control module;
s200, calculating and outputting a corresponding pressure value based on the main control module according to the voltage signal, and outputting a corresponding speed regulating instruction to the driving module according to the pressure value;
and S300, driving the alternating current variable frequency motor to rotate according to the speed regulation instruction based on the driving module.
Further, the step of calculating and outputting a corresponding pressure value according to the voltage signal based on the main control module and outputting a corresponding speed regulation instruction to the driving module according to the pressure value specifically includes:
s210, outputting a first speed regulating instruction to the driving module based on the fact that the main control module outputs a first speed regulating instruction when the pressure value is larger than a first preset value; outputting a second speed regulating instruction to the driving module based on the fact that the main control module outputs a second speed regulating instruction when the pressure value is smaller than a second preset value; outputting a third speed regulating instruction to the driving module based on the main control module when the pressure value is greater than the second preset value and smaller than the first preset value; wherein the first preset value is greater than the second preset value.
Further, referring to fig. 4, the driving module includes: the communication unit, the control unit and the driving unit are connected in sequence; the step of driving the alternating current variable frequency motor to rotate according to the speed regulation instruction based on the driving module specifically comprises the following steps:
s310, receiving a speed regulation instruction based on the communication unit and outputting the speed regulation instruction to the control unit;
s320, outputting a driving signal to a driving unit based on the control unit according to the speed regulation instruction;
and S330, driving the alternating current variable frequency motor to rotate at a rotating speed corresponding to the driving signal based on the driving unit according to the driving signal.
The invention also provides an air conditioner which comprises the control system of the alternating current variable frequency fan, and the control system of the alternating current variable frequency fan is not described in detail herein because the control system of the alternating current variable frequency fan is described in detail above.
In summary, the invention provided by the invention discloses an air conditioner, a control system of an alternating current variable frequency fan and a control method thereof, wherein the control system of the alternating current variable frequency fan comprises a detection module, a main control module, a driving module and an alternating current variable frequency motor, and the detection module, the main control module, the driving module and the alternating current variable frequency motor are sequentially connected; the detection module is used for acquiring a voltage signal corresponding to the pressure value of the refrigerant system and outputting the voltage signal to the main control module; the main control module is used for calculating and outputting a corresponding pressure value according to the voltage signal and outputting a corresponding speed regulating instruction to the driving module according to the pressure value; the driving module is used for driving the alternating current variable frequency motor to rotate according to the speed regulation instruction; the invention can effectively solve the problem that the existing outdoor unit fan system adopting the direct current brushless fan is poor in environmental adaptability, thereby improving the reliability of the whole system.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (10)
1. The utility model provides a control system who exchanges variable frequency fan which characterized in that includes:
the detection module, the main control module, the driving module and the alternating current variable frequency motor are sequentially connected;
the detection module is used for acquiring a voltage signal corresponding to a pressure value of a refrigerant system and outputting the voltage signal to the main control module;
the main control module is used for calculating and outputting a corresponding pressure value according to the voltage signal and outputting a corresponding speed regulating instruction to the driving module according to the pressure value;
the driving module is used for driving the alternating current variable frequency motor to rotate according to the speed regulation instruction.
2. The control system of the AC variable frequency fan according to claim 1,
when the pressure value is larger than a first preset value, the main control module is used for outputting a first speed regulating instruction to the driving module;
when the pressure value is smaller than a second preset value, the main control module is used for outputting a second speed regulating instruction to the driving module;
when the pressure value is larger than the second preset value and smaller than the first preset value, the main control module outputs a third speed regulating instruction to the driving module;
wherein the first preset value is greater than the second preset value.
3. The control system of an ac variable frequency fan of claim 2, wherein the drive module comprises:
the communication unit, the control unit and the driving unit are connected in sequence, and the communication unit is connected with the main control module;
the communication unit is used for receiving the speed regulating instruction and outputting the speed regulating instruction to the control unit;
the control unit is used for outputting a driving signal to the driving unit according to the speed regulating instruction;
and the driving unit drives the alternating current variable frequency motor to rotate at a rotating speed corresponding to the driving signal according to the driving signal.
4. The control system of the AC variable frequency fan of claim 3,
when the speed regulating instruction is the first speed regulating instruction, the control unit is used for outputting a first driving signal to the driving unit according to the first speed regulating instruction, and the driving unit is used for driving the rotating speed of the alternating current variable frequency motor to increase a preset value according to the first driving signal;
when the speed regulating instruction is the second speed regulating instruction, the control unit is used for outputting a second driving signal to the driving unit according to the second speed regulating instruction, and the driving unit is used for driving the rotating speed of the alternating current variable frequency motor to reduce a preset value according to the second driving signal;
and when the speed regulating instruction is the third speed regulating instruction, the control unit is used for outputting a third driving signal to the driving unit according to the third speed regulating instruction, and the driving unit is used for driving the rotating speed of the alternating current variable frequency motor to be unchanged according to the third driving signal.
5. The control system of an ac variable frequency fan of claim 3, wherein the drive module further comprises:
the rectifier unit is respectively connected with the switch unit, the control unit and the drive unit, the switch unit is respectively connected with an alternating current power supply, the switch power supply unit and the control unit, and the switch power supply unit is respectively connected with the alternating current power supply and the control unit;
the switch unit is used for switching on or off according to a switch signal of the control unit;
the rectifying unit is used for rectifying alternating current input by the alternating current power supply and then outputting direct current to supply power to the driving unit when the switching unit is switched on;
the switching power supply unit is used for providing electric energy for the control unit according to the alternating current.
6. The control system of an ac variable frequency fan of claim 1, wherein the detection module comprises:
the pressure sensor is connected with the main control module and used for detecting the pressure value of the refrigerant system and converting the pressure value of the refrigerant system into a voltage signal to be output to the main control module.
7. A control method of an alternating-current variable-frequency fan is characterized in that a control system of the alternating-current variable-frequency fan comprises a detection module, a main control module, a driving module and an alternating-current variable-frequency motor which are sequentially connected, and the method comprises the following steps:
acquiring a voltage signal corresponding to a pressure value of a refrigerant system based on the detection module, and outputting the voltage signal to the main control module;
calculating and outputting a corresponding pressure value according to the voltage signal based on the main control module, and outputting a corresponding speed regulating instruction to a driving module according to the pressure value;
and driving the alternating current variable frequency motor to rotate according to the speed regulation instruction based on the driving module.
8. The control method according to claim 7, wherein the step of calculating and outputting a corresponding pressure value according to the voltage signal based on the main control module and outputting a corresponding speed regulation instruction to the driving module according to the pressure value specifically comprises:
outputting a first speed regulating instruction to the driving module based on the main control module when the pressure value is greater than a first preset value;
outputting a second speed regulating instruction to the driving module based on the fact that the main control module outputs a second speed regulating instruction when the pressure value is smaller than a second preset value;
outputting a third speed regulating instruction to the driving module based on the fact that the main control module outputs a third speed regulating instruction when the pressure value is larger than the second preset value and smaller than the first preset value;
wherein the first preset value is greater than the second preset value.
9. The control method according to claim 7, wherein the drive module includes: the communication unit, the control unit and the driving unit are connected in sequence; the step of driving the alternating current variable frequency motor to rotate according to the speed regulation instruction based on the driving module comprises the following steps of:
receiving the speed regulating instruction based on the communication unit and outputting the speed regulating instruction to the control unit;
outputting a driving signal to a driving unit based on the control unit according to the speed regulating instruction;
and driving the alternating current variable frequency motor to rotate at a rotating speed corresponding to the driving signal based on the driving unit according to the driving signal.
10. An air conditioner, characterized in that, comprising the control system of the AC variable frequency fan in any one of claims 1-6.
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| CN202011416872.8A CN112728710A (en) | 2020-12-07 | 2020-12-07 | Air conditioner, control system of alternating current variable frequency fan and control method of control system |
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| CN202011416872.8A CN112728710A (en) | 2020-12-07 | 2020-12-07 | Air conditioner, control system of alternating current variable frequency fan and control method of control system |
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Citations (5)
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| JP2017083146A (en) * | 2015-10-30 | 2017-05-18 | ダイキン工業株式会社 | Air conditioner |
| CN107642497A (en) * | 2017-09-14 | 2018-01-30 | 温岭市大洋电器厂 | A kind of fan speed regulation control system based on Stress control |
| CN108444064A (en) * | 2018-04-19 | 2018-08-24 | 广东美的暖通设备有限公司 | Air-conditioning system and its control method |
| CN110542176A (en) * | 2019-09-19 | 2019-12-06 | 重庆美的通用制冷设备有限公司 | Defrosting control system and method for air conditioner, air conditioner and readable storage medium |
| US20200173683A1 (en) * | 2018-12-04 | 2020-06-04 | Lennox Industries Inc. | Method and system for supply-air re-circulation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017083146A (en) * | 2015-10-30 | 2017-05-18 | ダイキン工業株式会社 | Air conditioner |
| CN107642497A (en) * | 2017-09-14 | 2018-01-30 | 温岭市大洋电器厂 | A kind of fan speed regulation control system based on Stress control |
| CN108444064A (en) * | 2018-04-19 | 2018-08-24 | 广东美的暖通设备有限公司 | Air-conditioning system and its control method |
| US20200173683A1 (en) * | 2018-12-04 | 2020-06-04 | Lennox Industries Inc. | Method and system for supply-air re-circulation |
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Application publication date: 20210430 |