WO2014153848A1 - 空调室外风机的控制电路、控制方法及空调器 - Google Patents

空调室外风机的控制电路、控制方法及空调器 Download PDF

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Publication number
WO2014153848A1
WO2014153848A1 PCT/CN2013/077044 CN2013077044W WO2014153848A1 WO 2014153848 A1 WO2014153848 A1 WO 2014153848A1 CN 2013077044 W CN2013077044 W CN 2013077044W WO 2014153848 A1 WO2014153848 A1 WO 2014153848A1
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WO
WIPO (PCT)
Prior art keywords
outdoor fan
outdoor
value
gear
air conditioner
Prior art date
Application number
PCT/CN2013/077044
Other languages
English (en)
French (fr)
Inventor
韦汉儒
黄迎光
马勇
陈建昌
彭和平
梁敏游
Original Assignee
美的集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 美的集团股份有限公司 filed Critical 美的集团股份有限公司
Priority to RU2015145181A priority Critical patent/RU2015145181A/ru
Publication of WO2014153848A1 publication Critical patent/WO2014153848A1/zh

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74Control 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
    • F24F11/77Control 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature
    • F24F2110/12Temperature of the outside air
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the invention relates to the technical field of air conditioners, and in particular to a control circuit, a control method and an air conditioner of an outdoor fan of an air conditioner. Background technique
  • the main object of the present invention is to provide a control circuit for an outdoor fan of an air conditioner, which aims to effectively solve the frequent start and stop of the current air conditioner device during cooling operation in a low temperature environment, resulting in a poor cooling effect and failing to better satisfy the customer. Cooling requirements in low temperature environments.
  • the present invention provides a control circuit for an outdoor fan of an air conditioner, comprising: an outdoor ambient temperature detecting unit, configured to detect an outdoor ambient temperature when the outdoor fan of the air conditioner is running Degree TempX;
  • a condenser tube temperature detecting unit configured to detect an outdoor condenser coil temperature value when the outdoor fan of the air conditioner is running
  • the main control unit determines the adjustment range of the outdoor fan speed according to the outdoor ambient temperature value TempX, and determines the initial gear position value N1 of the outdoor fan in the adjustment interval, according to the outdoor condenser coil temperature value TempY and the preset reference temperature Tempi and Temp2 is compared to determine the speed adjustment gear position value N2 of the outdoor fan in the adjustment section, and output the corresponding rotation speed command to the fan drive unit according to the initial gear position value N1 or the adjustment gear position value N2;
  • the fan driving unit is configured to drive the outdoor fan load according to the control instruction to adjust the outdoor fan to operate at a corresponding speed.
  • the main control unit is further configured to control the air conditioner outdoor fan to start at a preset speed for a preset time T1, which is in the range of 5-60 seconds, before detecting the TempX.
  • the main control unit is further configured to control the air conditioner outdoor fan to operate at a current gear speed for a preset time T2 before detecting TempY, and the value ranges from 5 to 60 seconds.
  • the range of Tempi values is: 15 ° C - 50 ° C
  • the range of Temp 2 values is: 15 ° C - 50
  • the control circuit of the air conditioner outdoor fan further includes:
  • the four-way valve working state detecting unit is configured to detect the working state of the air conditioner four-way valve to determine the working mode of the air conditioner.
  • the present invention also provides an air conditioner comprising an outdoor unit condenser and an outdoor fan, which further includes a control circuit for the air conditioning outdoor fan.
  • the control circuit of the air conditioner outdoor fan includes:
  • the outdoor ambient temperature detecting unit is configured to detect the outdoor ambient temperature value TempX when the outdoor fan of the air conditioner is running;
  • a condenser tube temperature detecting unit configured to detect an outdoor condenser coil temperature value when the outdoor fan of the air conditioner is running
  • the main control unit determines the adjustment range of the outdoor fan speed according to the outdoor ambient temperature value TempX, and determines the initial gear position value N1 of the outdoor fan in the adjustment interval, according to the outdoor condenser coil temperature value TempY and the preset reference temperature Tempi and Temp2 is compared to determine the speed adjustment gear position value N2 of the outdoor fan in the adjustment section, and output the corresponding rotation speed command to the fan drive unit according to the initial gear position value N1 or the adjustment gear position value N2;
  • the fan driving unit is configured to drive the outdoor fan load according to the control instruction to adjust the outdoor fan to operate at a corresponding speed.
  • the invention also provides an outdoor fan control method for an air conditioner, comprising the following steps:
  • the output control command determines the initial gear position value N1 of the outdoor fan in the adjustment section, and controls the outdoor fan to operate according to the corresponding speed of the N1 gear position;
  • N2 controls the outdoor fan to run at the corresponding speed.
  • the initial gear position value N1 in the adjustment interval is larger, and when the TempX is smaller, the initial gear position value N1 in the adjustment interval is smaller.
  • the initial gear position value N1 is located in the intermediate gear position of the gear position in the adjustment interval or the intermediate gear position value.
  • step A further comprising:
  • the air conditioner outdoor fan When the air conditioner outdoor fan starts, it runs at a preset speed for a preset time T1, which ranges from 5-60 seconds.
  • the method further comprises:
  • the outdoor fan runs at the current gear speed for a preset time T2, which ranges from 5-60 seconds.
  • a preset time T2 which ranges from 5-60 seconds.
  • Tempi and Temp2 values Tempi range: 15 °C - 50 °C
  • Temp2 range: 15 °C -50 °C
  • the method before detecting the outdoor ambient temperature value TempX when the outdoor fan of the air conditioner is running, the method further includes:
  • the working state of the four-way valve of the air conditioner is detected to determine the working mode of the air conditioner.
  • the control circuit of the air conditioner outdoor fan of the present invention controls the outdoor fan speed to adjust the air volume of the air conditioner condenser by detecting the external ambient temperature and the tube temperature of the outdoor condenser, thereby realizing the cooling demand in the case of a low outdoor environment temperature, and improving the cooling.
  • the effect is to avoid damage to the compressor in low-load refrigeration, and solve the problem that the existing air conditioner has poor cooling effect at low temperature and can damage the compressor.
  • the invention can meet the normal use of the air conditioner in a low temperature environment, compared with other control methods and speed regulating devices, the cost is low, the system is more stable, the adjustment of the outdoor air volume is smooth and orderly, and the speed of the outdoor fan is adjusted in an orderly manner so that the sensor The temperature change is small and does not cause the outdoor fan to converge, which enables an ultra-wide cooling range of outdoor ambient temperature from -20 °C to 55 °C.
  • the solution of the invention obtains the adjustment range of the outdoor fan speed and the initial value of the speed by using TempX, and then finely adjusts the speed in the interval by using Temp Y to achieve the purpose of quickly adjusting the speed of the outdoor fan.
  • FIG. 1 is a schematic structural view of a control circuit of an outdoor fan of an air conditioner according to a preferred embodiment of the present invention
  • FIG. 2 is a schematic structural view of a control circuit of an outdoor fan of an air conditioner according to another preferred embodiment of the present invention
  • FIG. 4 is a schematic flow chart of a method for controlling an air conditioner outdoor fan according to another preferred embodiment of the present invention
  • FIG. 5 is a schematic diagram of an air conditioning system according to the present invention.
  • the present invention provides a control circuit for an outdoor fan of an air conditioner.
  • the control circuit of the outdoor fan of the air conditioner includes at least:
  • the outdoor ambient temperature detecting unit 10 is configured to detect an outdoor ambient temperature value TempX when the outdoor fan of the air conditioner is running;
  • a condenser tube temperature detecting unit 30 configured to detect an outdoor condenser coil temperature value when the outdoor fan of the air conditioner is running, TempY;
  • the main control unit 20 determines an adjustment range of the outdoor fan speed according to the outdoor ambient temperature value TempX, and determines an initial gear value N1 of the outdoor fan in the adjustment section, according to the outdoor condenser coil temperature
  • the degree TempY is compared with the preset reference temperatures Tempi and Temp2 to determine the speed adjustment gear value N2 of the outdoor fan in the adjustment interval, and output the corresponding speed command to the fan drive according to the initial gear value N1 or the adjusted gear value N2. unit;
  • the fan driving unit 40 is configured to drive the outdoor fan load according to the control command to adjust the outdoor fan to operate at a corresponding speed.
  • the control circuit of the outdoor fan of the air conditioner may further include a zero crossing signal detecting unit 50 and an outdoor fan load unit 60.
  • the function of the zero-crossing signal detecting unit 50 is to obtain the zero-crossing triggering time of the power source, so that the main control unit 20 controls the fan driving unit 40 to operate.
  • the outdoor ambient temperature detecting unit 10 and the condenser tube temperature detecting unit 30 may include a temperature sensor. These sensors are sent to the main control unit 20 after sequentially acquiring the temperature signals, so that the main control unit 20 determines whether it is necessary to adjust the gear positions of the outdoor fans.
  • the main control unit 20 determines the wind speed gear value of the outdoor fan when it first enters the cooling mode according to the outdoor ambient temperature value detected by the outdoor ambient temperature detecting unit 10, and runs a preset time. After the preset time elapses, the condenser tube temperature detecting unit 30 detects the condenser coil temperature and sends it to the main control unit 20, and the main control unit 20 determines the outdoor condenser disc according to the temperature signal sent by the condenser tube temperature detecting unit 30. Whether the tube temperature is within a preset range (for example, > 33 °C ⁇ 46 °C), if yes, keep the outdoor fan gear position, if not, generate a control command to control the fan drive unit 40 to work. The driving unit 40 outputs a voltage signal to the outdoor fan load unit, and drives the outdoor fan load unit 60 to adjust the gear position of the outdoor fan.
  • a preset range for example, > 33 °C ⁇ 46 °C
  • the adjustment range and the initial speed value of the outdoor fan speed are obtained by using TempX, and the speed in the interval is finely adjusted by using Temp Y to achieve the purpose of quickly adjusting the speed of the outdoor fan.
  • the cooling demand in the case of low outdoor ambient temperature is achieved, the cooling effect is improved, and the compressor is damaged in low-load refrigeration, and the problem that the existing air conditioner has poor cooling performance and damages the compressor during low-temperature cooling is solved. .
  • the invention can meet the normal use of the air conditioner in a low temperature environment, compared with other control methods and speed regulating devices, the cost is low, the system is more stable, the adjustment of the outdoor air volume is smooth and orderly, and the speed of the outdoor fan is adjusted in an orderly manner so that the sensor The temperature change is small and does not cause the outdoor fan to converge, which enables an ultra-wide cooling range of outdoor ambient temperature from -20 °C to 55 °C.
  • the main control unit 20 is further configured to control the air conditioner outdoor fan to start at a preset speed for a preset time T1 before the TempX is detected, and the value ranges from 5 to 60 seconds.
  • the air conditioner outdoor fan runs at a preset speed for a preset time T1, and its value ranges from 5-60.
  • TempY tends to stabilize after allowing the condenser to heat up sufficiently.
  • the preset speed can be selected to be close to the highest speed or the highest speed.
  • the principle is to run smoothly at start-up to prevent the motor from being damaged due to excessive current of the fan motor when starting at low speed.
  • the fan gears have a total of 15 gears. In this embodiment, the 15th gear or the 13th gear, the 14th gear, and the like can be selected.
  • the main control unit 20 is further configured to control the outdoor fan of the air conditioner to run at the current gear speed for a preset time T2 before detecting TempY, and the value ranges from 5 to 60 seconds. This allows the control system to continuously repeat the test, and automatically adjust and adjust the gear position with the changes of TempX and TempY to achieve the best use.
  • control circuit of the outdoor fan of the air conditioner may further include: a jumper detecting unit 70, configured to acquire a current input power frequency value, and determine that the current model value is output to the main control unit 20 Therefore, the main control unit 20 determines different outdoor fan speed values of each wind speed gear of the outdoor fan according to different models.
  • control circuit of the air conditioner outdoor fan further includes: a four-way valve working state detecting unit 80, configured to detect an operating state of the air conditioner four-way valve to determine an operating mode of the air conditioner, when the air conditioner When the cooling mode is used, the outdoor fan control method of the present invention is enabled, and when it is in the heating mode, the outdoor fan control method of the present invention is not activated. Since the four-way valve working state detecting unit 80 is provided, the control circuit of the air conditioner outdoor fan of the present invention can work according to the working mode of the air conditioner, thereby avoiding the above-mentioned control of the air conditioner in the heating mode, thereby causing energy consumption.
  • control circuit of the air conditioner outdoor fan may further include an LED display unit 90, and the LED display unit 90 is provided with an LED lamp for displaying fault information of the air conditioner during operation. Since the LED display unit 90 is provided, the control circuit of the outdoor fan of the air conditioner of the present invention can display the failure information for the user to maintain the air conditioner.
  • the working process of the control circuit of the air conditioner outdoor fan may include: First, when the outdoor fan starts to start, the jumper detecting unit 70 acquires the current input power frequency value and determines the current air conditioner model value. Then, the four-way valve working state detecting unit 80 determines whether the four-way valve is powered on, and if so, starts the outdoor fan to run at full speed for a preset time interval T1 for 50 seconds, so that the TempY tends to be stable after the condenser is fully exchanged, and then passes.
  • the outdoor ambient temperature detecting unit 10 detects the outdoor ambient temperature TempX, and the main control unit 20 controls the outdoor fan to enter the initial gear value N1 according to the outdoor ambient temperature TempX.
  • the outdoor fan runs in the initial gear for a predetermined time interval T2.
  • the timing determining unit 50 counts and determines whether the preset time interval T2 is reached (the preset time interval can be set to 50 seconds, and also according to different actual needs. You can set the preset time interval to other time values) If so, the condenser tube temperature detecting unit 30 detects the outdoor condenser coil temperature value TempY, and the main control unit 20 compares the outdoor condenser coil temperature value TempY with the reference temperatures Tempi and Temp2, and if Tempi 3 ⁇ 4 ⁇ TempY3 ⁇ 4 ⁇ Temp2, The main control unit 20 does not adjust the outdoor fan speed gear position.
  • the main control unit 20 lowers the outdoor fan gear by one gear, and if the lowest gear value within the adjustment interval has been reached, it is no longer adjusted. If TempY>Templ, the main control unit 20 raises the first fan gear position by one gear, and if the highest gear value within the adjustment interval has been reached, it is no longer adjusted.
  • the outdoor fan runs at the current gear speed for a preset time interval T2 50 seconds, compares the condenser coil temperature value TempY and the reference temperatures Tempi and Temp2 to make the above judgment. Adjust the outdoor fan speed gear position, let the control system repeat the test continuously, and automatically judge and adjust the gear position with the change of TempX and TempY to achieve the best use effect.
  • the relationship between the first reference temperature Tempi and the second reference temperature Temp2 is: Templ ⁇ Temp2, and 5 °C 3 ⁇ 4 ⁇ Temp2-Templ3 ⁇ 4 ⁇ 20 ° C, to avoid the two reference temperature values are not too small as the difference is 2 ° C
  • the number of frequent adjustments to the outdoor fan gear position is excessive, or when the difference between the two reference temperatures is too large, the outdoor fan gear position adjustment is too small to lose the effect of the present invention.
  • the first reference temperature Tempi is set to 33 ° C
  • the second reference temperature Temp2 is set to 46 ° C.
  • Tempi and Temp2 may be set to other temperatures according to different actual needs. value. Tempi and Temp2, ranging from 15 °C to 50 °C.
  • the outdoor unit determines whether it is the cooling mode by whether the four-way valve is powered on.
  • the cooling mode is used to start the control circuit of the outdoor fan of the air conditioner of the present invention
  • the outdoor fan first runs at full speed for 50 seconds and then enters the initial gear position according to the outdoor ambient temperature value TempX.
  • the initial gear rules are as shown in Table 1 below:
  • the initial gear value of the outdoor fan is larger, such as 7 ° C ⁇
  • the initial gear value of the outdoor fan is 7, and when 11 °C TempX ⁇ 15 °C, the initial gear value of the outdoor fan is 9.
  • the initial gear value of the outdoor fan is smaller.
  • the initial gear value of the outdoor fan is 4, when -13 °C TempX ⁇ -8 °C
  • the initial gear value of the outdoor fan is 3.
  • the outdoor fan speed After running the 50-second full-speed windshield, the outdoor fan speed will enter the initial windshield for the first time according to the outdoor ambient temperature value TempX, and then adjust according to the change of the condenser coil temperature value TempY.
  • the adjustment interval may be set according to the outdoor ambient temperature. After the outdoor condenser coil temperature value TempY and the outdoor ambient temperature value TempX are acquired, the interval according to the outdoor ambient temperature value TempX is passed every 50 seconds.
  • the outdoor fan coil position is adjusted by comparing the outdoor condenser coil temperature value TempY with the first reference temperature Tempi 33 ° C and the second reference temperature Temp2 46 ° C. See Table 2 below.
  • the correspondence between the gear position of the outdoor fan and the environmental range can be:
  • the outdoor ambient temperature value TempX is 2 °C
  • Table 1 the interval corresponding to -2 °C ⁇ TempX ⁇ 3 °C
  • the initial gear value of the outdoor fan is 5, and it can be seen from Table 2 that it is at -2 °C.
  • the outdoor fan has a gear value of 3/4/5/6/7/8 in this interval, and the condenser coil temperature value TempY is detected every 50 seconds, if 33°C ⁇ TempY ⁇ 46 °C, the wind speed remains at the fifth gear.
  • TempY ⁇ 33 ° C the outdoor fan drops 1 to 4, and if it has dropped to the lowest 3 in this interval, the outdoor fan gear no longer drops.
  • TempY>46°C the outdoor fan rises to 6th. If it has risen to the highest level 8 in this range, the outdoor fan gear will no longer rise.
  • Table 2 the outdoor ambient temperature value
  • the initial gear position value of the outdoor fan is located in the intermediate gear position or the near intermediate gear position in the corresponding adjustment interval, so that the outdoor fan enters the initial gear value through the outdoor ambient temperature value TempX. Then, according to the temperature value of the condenser coil temperature Temp value, the gear position adjustment within the adjustment interval can be quickly adjusted to the target gear value within the interval.
  • the initial gear value determined in Table 1 when -13 °C TempX ⁇ -8 °C is 3, according to -13 °C TempX ⁇ -8 ° in Table 4. Make sure that the adjustment gear position value in this interval is 1/2/3/4/5.
  • the initial gear determined when -13 °C ⁇ TempX ⁇ -8 °C
  • the bit value of 3 is in the middle gear value determined by Table 4 according to -13 °C ⁇ TempX ⁇ -8 °C to adjust the gear value 1/2/3/4/5, and then according to the TempY temperature value, it can be quickly
  • the low gear is adjusted to 2 or 1 gear, or the high gear is adjusted to 4 or 5 gears.
  • the control process of the control circuit when the air conditioner receives the shutdown signal to turn off or power off, the control process of the control circuit also ends.
  • the outdoor fan motor of the present invention may be an AC motor or a DC motor.
  • the motor drive unit can adjust the motor speed by adjusting the input voltage of the AC motor to the speed value corresponding to the outdoor fan gear in the above description;
  • the outdoor fan motor is a DC motor, the motor drive unit
  • the DC motor speed can be easily adjusted by adjusting the PWM (pulse width modulation) of the DC motor, and the speed of the DC motor can be conveniently adjusted to the speed value corresponding to the outdoor fan gear in the above description.
  • the fan gear range of the present invention ranges from 3-20 gears, preferably 5-15 gears. In this embodiment, there are a total of 15 gears, and the larger the gear value, the higher the corresponding rotational speed value.
  • the gear position value can also be determined as other values according to the actual operation of the air conditioner, such as 5th gear, 6th gear, 20th gear, etc.
  • the speed value of each gear can be determined according to the actual operation requirements of the air conditioner.
  • the ratio of the outdoor fan speed value of each gear to the maximum speed of the outdoor fan is as follows: Outdoor fan gear 1 gear 2 gear 3 gear 4 gear 5 gear 6 gear 7 gear 8 gear 8 gear The ratio of the maximum speed is 6% 13% 22% 29% 35% 41% 47% 54% Outdoor fan gear 9 gear 10 gear 11 gear 12 gear 13 gear 14 gear 15 gear 15 gear
  • the present invention also provides an air conditioner comprising at least an outdoor unit condenser, an outdoor fan, and a control circuit of the air conditioner outdoor fan.
  • the structure and working principle of the control circuit can be seen in Figures 1 and 2 and their corresponding embodiments, and will not be described in detail herein.
  • the air conditioner of the invention can meet the normal use of the air conditioner in a low temperature environment due to the control circuit of the air conditioner outdoor fan. Compared with other control methods and speed regulating devices, the cost is low, the system is more stable, and the outdoor air volume is adjusted smoothly and orderly.
  • the orderly adjustment of the speed of the outdoor fan makes the temperature change of the sensor small without causing the speed of the outdoor fan to converge, and the ultra-wide cooling range of the outdoor ambient temperature from -20 °C to 55 °C can be achieved.
  • the present invention also provides a method of controlling an outdoor fan of an air conditioner, which can be implemented based on a control circuit of the fan of the air conditioning room.
  • the method includes the following steps:
  • Step S10 detecting an outdoor ambient temperature value TempX when the outdoor fan of the air conditioner is running
  • Step S20 determining an adjustment range of the outdoor fan speed according to the outdoor ambient temperature value TempX, and outputting a control command to determine an initial gear position value N1 of the outdoor fan in the adjustment section, and controlling the outdoor fan to operate according to the corresponding rotation speed of the N1 gear position;
  • Step S30 detecting the outdoor condenser coil temperature value TempY when the outdoor fan of the air conditioner is running, comparing the detected outdoor condenser coil temperature value TempY with the preset reference temperatures Tempi and Temp2, and adjusting the outdoor in the adjustment interval
  • the speed position of the fan is used to obtain the adjustment gear value N2: When Tempi ⁇ TempY ⁇ Temp2, the outdoor fan speed gear position is not adjusted; when TempY ⁇ Templ, the outdoor fan gear position is lowered by one gear, if the adjustment has been reached The lowest gear value in the interval is no longer adjusted.
  • Step S40 adjusting the gear position value N2 according to the rotation speed to control the outdoor fan to operate at the corresponding rotation speed.
  • the wind speed of the outdoor fan of the air conditioner can be divided into a plurality of (for example, 5-20) preset gear positions by the main control unit.
  • the outdoor condenser disk is detected every other preset time. Tube temperature, and then determine whether the outdoor condenser coil temperature is within a preset range. If it is within this range, the main control unit controls the wind speed gear position to not adjust; if the outdoor condenser coil temperature rises above the preset range , the main control unit controls the outdoor fan speed gear to increase by one gear until the maximum value of the gear position in the gear adjustment interval is not adjusted; if the outdoor condenser coil temperature decreases below this range, then the outdoor control unit The fan speed gear is reduced by one gear until the minimum value of the gear position within the gear adjustment interval is not adjusted.
  • the method may further include:
  • the air conditioner outdoor fan When the air conditioner outdoor fan starts, it runs at a preset speed for a preset time T1, and its value ranges from 5-60 seconds. After the condenser is fully heat exchanged, TempY tends to be stable.
  • the preset speed can be selected to be close to the highest speed or the highest speed.
  • the principle is to run smoothly at start-up to prevent the motor from being damaged due to excessive current of the fan motor when starting at low speed.
  • the fan gears have a total of 15 gears. In this embodiment, the 15th gear or the 13th gear, the 14th gear, and the like can be selected.
  • the method may further include:
  • the outdoor fan runs at the current gear speed for a preset time T2, which ranges from 5-60 seconds. Let the control system repeat the test continuously, and automatically change and adjust the gear position with the change of TempX and TempY to achieve the best use effect.
  • the outdoor AC outdoor fan speed is controlled by the outdoor ambient temperature and the outdoor condenser coil temperature to adjust the air volume of the air conditioner condenser, and after the power is turned on, the outdoor ambient temperature is determined to be when the outdoor ambient temperature first enters the cooling mode.
  • the control method of the outdoor fan of the air conditioner of the invention is specially designed for the low temperature refrigerating air conditioner, and satisfies the normal use of the air conditioner in a low temperature environment, and has lower cost and more stable system than other control methods and speed regulating devices.
  • the adjustment of outdoor air volume is smooth and orderly.
  • the orderly adjustment of the speed of the outdoor fan makes the temperature change of the sensor small and does not cause the speed of the outdoor fan to fluctuate. It can realize the ultra-wide cooling range of the outdoor ambient temperature from -20 ° C to 55 ° C. .
  • the method before performing the comparing the detected outdoor condenser coil temperature with a preset reference temperature, the method includes: presetting a first reference temperature Tempi (for example, 33 ° C) and a second reference temperature Temp2 ( For example, 46 ° C), the value of the second reference temperature Temp2 is greater than the first reference temperature Templ.
  • a first reference temperature Tempi for example, 33 ° C
  • a second reference temperature Temp2 for example, 46 ° C
  • TempY temperature may be set according to different actual needs.
  • the preset range is other temperature values.
  • the range of Tempi and Temp2 can be: 15°C-50
  • the method before performing step S30, the method further includes:
  • the working state of the four-way valve of the air conditioner is detected to determine the working mode of the air conditioner.
  • the four-way valve is shown in the cooling mode when the power is not energized, and the outdoor fan control method of the present invention is enabled.
  • the four-way valve is in the heating mode and the outdoor fan is operated according to the original control method of the air conditioner. Since the four-way valve working state detecting unit 80 is provided, the control circuit of the air conditioner outdoor fan of the present invention can work according to the working mode of the air conditioner, thereby avoiding the above-mentioned control of the air conditioner in the heating mode, thereby causing energy consumption.
  • the control circuit of the outdoor fan of the air conditioner of the present invention can display a fault message for the user to maintain the air conditioner.
  • the method for controlling the air conditioner outdoor fan may include the following steps:
  • Step S1 When the outdoor fan starts, obtain the current input power frequency value and determine the current model value; Step S2, determine whether the four-way valve is powered on, if otherwise, execute step S3, if the control circuit of the air conditioner outdoor fan is not activated, the process ends.
  • Step S3 the outdoor fan runs at full speed for 50 seconds, and then detects the outdoor ambient temperature value TempX, and determines the initial gear value according to the outdoor ambient temperature value TempX.
  • step S4 the outdoor fan runs for 50 seconds at the current gear value.
  • Step S5 comparing the condenser coil temperature value TempY and the first preset temperature Tempi and the second preset temperature Temp2 value, if Tempi ⁇ TempY ⁇ Temp2, the outdoor fan speed gear position is not adjusted, and jumps Go to step S4. Otherwise, it proceeds to step S6.
  • Step S6 if TempY ⁇ Templ, it is judged whether the outdoor fan gear position has reached the lowest level, if it is lowered by one gear, then it is no longer adjusted, and the process proceeds to step S4. Otherwise, go to step S7.
  • Step S7 if TempY>Templ, it is judged whether the outdoor fan gear position has reached the highest gear position, and if it is increased by one gear, it is not adjusted, and the process proceeds to step S4. Otherwise, go to step S4.
  • the invention also provides an air conditioner, the schematic diagram of the air conditioner can increase the control on the existing air conditioner Based on the control method of the present invention, the low-temperature cooling function is realized, which is advantageous for upgrading and upgrading on the original model.
  • the air conditioning system in the figure comprises a compressor 1 connected in sequence, a four-way valve 2, an outdoor heat exchanger 4, an outdoor fan 3, an outdoor unit control circuit main board 6, an outdoor unit control circuit board 7 according to the present invention, a throttle device 5 , indoor heat exchanger 9, indoor fan 8.
  • the outdoor unit main board 6 and the outdoor unit control circuit board 7 can adjust the rotation speed of the outdoor fan 3, thereby adjusting the amount of heat exchange of the outdoor heat exchanger 4.
  • the outdoor unit control circuit board 7 further includes an outdoor ambient temperature detecting unit 71 and an outdoor heat exchanger condensing temperature detecting unit 72.
  • the outdoor ambient temperature detecting unit 71 acquires the outdoor ambient temperature value TempX.
  • the outdoor heat exchanger condensing temperature detecting unit 72 acquires the condenser coil temperature TempY and is mounted on the condenser.
  • the outdoor unit control circuit board 6 needs to be connected to the outdoor unit control circuit board 7, and the outdoor environment temperature detecting unit (outdoor ambient temperature temperature sensing unit) 71 on the outdoor unit control circuit board 7 is installed and placed behind the condenser, and the outdoor unit is replaced.
  • the heat exchanger condensing temperature detecting unit (outdoor heat exchanger condensing temperature temperature sensing pack) 72 is installed on the condenser, and the outdoor fan control line is inserted into the outdoor unit control circuit board 7.
  • the outdoor unit control circuit board 7 realizes the low temperature cooling function according to the technical solution of the present invention, which is stable and fast, and requires a short time.
  • the above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are used directly or indirectly in other related technical fields. The same is included in the scope of patent protection of the present invention.

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Abstract

一种空调室外风机的控制电路,包括:室外环境温度检测单元(10),在空调器室外风机运转时检测室外环境温度值TempX;冷凝器管温检测单元(30),在空调器室外风机运转时检测室外冷凝器盘管温度值TempY;主控制单元(20),根据室外环境温度值TempX确定室外风机转速的调节区间,并确定室外风机在调节区间中的初始档位值N1,根据室外冷凝器盘管温度值TempY与预设的参考温度Temp1,Temp2进行比较,确定室外风机在调节区间内的转速调整档位值N2,根据初始档位值N1或调整档位值N2输出对应的转速指令到风机驱动单元(40);风机驱动单元(40),根据控制指令驱动室外风机负载,以调整室外风机按对应转速运行。以及一种具有该控制电路的空调和一种空调室外风机的控制方法。

Description

说 明 书
空调室外风机的控制电路、 控制方法及空调器 技术领域
本发明涉及空调器技术领域, 特别涉及一种空调室外风机的控制电路、 控制方法和空调器。 背景技术
众所周知, 大型通讯机房、 配电房或电子设备车间这些场所内的设备或 机器在运行过程中会不断地发热, 有可能导致设备和元器件温度升高, 进而 缩短设备或机器的寿命, 还有类似俄罗斯地区、 南非地区、 中国北方地区寒 冷冬季开放暖气造成房间温度太高令人感觉不舒适, 因此有必要在这种低温 环境下采用空调器对设备或空间进行温度调节。 即使当室外环境温度很低时, 也需要空调器去制冷以降低设备或机器的温度, 从而延长设备或机器的使用 寿命。 但普通的空调器的控制电路在低温环境下制冷时, 容易导致蒸发器结 霜和结冰, 防冻结保护功能频繁启停, 导致空调器不能正常输出所需要的制 冷量, 不能满足这些特殊场所的需要。 虽然市场上出现一些低温空调器装置, 但这些空调器装置的控制逻辑比较筒单及控制方法比较粗糙, 在低温制冷时 会频繁的启停, 导致制冷效果不好, 不能更好的满足客户在低温环境下制冷 需求。
中国专利公开号为 CN 201145378 Y ,名称为 "定频空调的风机转速控制 模块" 的专利公开了一种室外风机转速控制装置, 该方案中通过温度传感器 获取冷媒温度去调节风机转速, 使得冷媒温度随风机转速的变化一直变化, 使得冷媒温度和风机转速稳定的时间很长, 且不容易稳定。 发明内容
本发明的主要目的在于提供一种空调室外风机的控制电路, 旨在有效解 决目前的空调器装置在低温环境下制冷运行时频繁的启停, 导致制冷效果不 好, 不能更好的满足客户在低温环境下制冷需求。
为了实现发明目的, 本发明提供一种空调室外风机的控制电路, 其包括: 室外环境温度检测单元, 用于在空调器室外风机运转时检测室外环境温 度值 TempX;
冷凝器管温检测单元, 用于在空调器室外风机运转时检测室外冷凝器盘 管温度值 TempY;
主控制单元,根据室外环境温度值 TempX确定室外风机转速的调节区间, 并确定室外风机在调节区间中的初始档位值 N1 , 根据室外冷凝器盘管温度值 TempY与预设的参考温度 Tempi和 Temp2进行比较,确定室外风机在调节区 间内的转速调整档位值 N2, 根据初始档位值 N1或调整档位值 N2输出对应 的转速指令到风机驱动单元;
风机驱动单元, 用于根据所述控制指令驱动室外风机负载, 以调整室外 风机按对应的转速运行。
优选地, 所述主控制单元还用于控制空调室外风机在启动时, 在检测 TempX前, 以预设转速运行一预设时间 T1 , 其取值范围为 5-60秒。
优选地, 所述主控制单元还用于控制空调室外风机在检测 TempY之前以 当前档位转速运行一预设时间 T2, 其取值范围为 5-60秒。
优选地, 所述 Tempi值的范围为: 15°C-50°C ,Temp2值的范围为: 15°C-50
。C,且 Temp2>Templ。
优选地, Tempi值和 Temp2值的取值范围为 5°C ¾≡ Temp2-Templ¾≡20°C; 优选地, 上述空调室外风机的控制电路, 还包括:
四通阀工作状态检测单元, 用以检测空调器四通阀的工作状态以确定空 调器的工作模式。
本发明还提供一种空调器, 包括室外机冷凝器、 室外风机, 其还包括空 调室外风机的控制电路。 该空调室外风机的控制电路包括:
室外环境温度检测单元, 用于在空调器室外风机运转时检测室外环境温 度值 TempX;
冷凝器管温检测单元, 用于在空调器室外风机运转时检测室外冷凝器盘 管温度值 TempY;
主控制单元,根据室外环境温度值 TempX确定室外风机转速的调节区间, 并确定室外风机在调节区间中的初始档位值 N1 , 根据室外冷凝器盘管温度值 TempY与预设的参考温度 Tempi和 Temp2进行比较,确定室外风机在调节区 间内的转速调整档位值 N2, 根据初始档位值 N1或调整档位值 N2输出对应 的转速指令到风机驱动单元; 风机驱动单元, 用于根据所述控制指令驱动室外风机负载, 以调整室外 风机按对应的转速运行。
本发明还提供一种空调的室外风机控制方法, 包括以下步骤:
A.在空调器室外风机运转时检测室外环境温度值 TempX;
B.根据室外环境温度值 TempX确定室外风机转速的调节区间, 输出控制 指令确定室外风机在调节区间中的初始档位值 N1 , 并控制室外风机按 N1档 位的对应转速运行;
C.在空调器室外风机运转时检测室外冷凝器盘管温度值 TempY, 将检测 到的室外冷凝器盘管温度值 TempY与预设的参考温度 Tempi和 Temp2进行 比较, 在调节区间内调整室外风机的转速档位以获得调整档位值 N2:
当 Tempi < TempY < Temp2时, 对室外风机转速档位不做调整; 当 TempY<Templ时,对室外风机档位降低一档,如果已经达到调节区间 内的最低档位值不再调整。
当 TempY>Temp2时,对室外风机档位上升一档,如果已经达到调节区间 内的最高档位值不再调整。
D.根据转速调整档位值 N2控制室外风机按对应转速运行。
优选地, 当室外环境温度值 TempX越大时, 所述调节区间内的初始档位 值 N1越大, 当 TempX越小时, 所述的调节区间内的初始档位值 N1越小。
优选地, 根据室外环境温度值确定室外风机转速的调节区间并输出室外 风机的初始档位值 N1时, 其初始档位值 N1位于调节区间内档位的中间档位 值或偏近中间档位值。
优选地, 在步骤 A之前还包括:
空调室外风机在启动时, 以预设转速运行一预设时间 T1 , 其取值范围为 5-60秒。
优选地, 在步骤 C之前还包括:
室外风机以当前档位转速运行一预设时间 T2, 其取值范围为 5-60秒。 优选地, 其预设的参考温度 Tempi 和 Temp2值, Tempi 范围: 15 °C-50 °C ,Temp2范围: 15 °C -50°C ,且 Temp2>Temp 1。
优选地, 在空调器室外风机运转时检测室外环境温度值 TempX之前还包 括:
检测空调器四通阀的工作状态以确定空调器的工作模式。 本发明空调室外风机的控制电路通过检测外部环境温度和室外冷凝器的 管温, 控制室外风机转速以调整空调器冷凝器的风量, 进而实现在室外环境 温度很低情况下的制冷需求, 提升制冷效果并避免在低负荷制冷损坏压缩机, 解决现有的空调器在低温制冷时所存在的制冷效果差且会损坏压缩机的问 题。 本发明可满足空调器在低温环境下正常使用, 相比于其它的控制方法和 调速装置, 成本低, 系统更加稳定, 室外风量的调整平稳有序, 室外风机的 转速有序调整使得传感器的温度变化小而不会导致室外风机的转速聚变, 可 以实现室外环境温度从 -20 °C到 55 °C的超宽制冷范围。
本发明方案通过利用 TempX 获取室外风机转速的调节区间和转速初档 值, 再利用 Temp Y对区间内的转速进行细调, 达到快速调节室外风机转速的 目的。 附图说明
图 1为本发明一较佳实施例中空调室外风机的控制电路的结构示意图; 图 2为本发明另一较佳实施例中空调室外风机的控制电路的结构示意图; 图 3为本发明一较佳实施例中空调室外风机的控制方法的流程示意图; 图 4为本发明另一较佳实施例中空调室外风机的控制方法的流程示意图; 图 5为本发明空调系统的原理图。
本发明目的的实现、 功能特点及优点将结合实施例, 参照附图做进一步 说明。 具体实施方式
应当理解, 此处所描述的具体实施例仅用以解释本发明, 并不用于限定 本发明。
本发明提供一种空调室外风机的控制电路,参照图 1 ,本发明一实施例中, 该空调室外风机的控制电路至少包括:
室外环境温度检测单元 10, 用于在空调器室外风机运转时检测室外环境 温度值 TempX;
冷凝器管温检测单元 30, 用于在空调器室外风机运转时检测室外冷凝器 盘管温度值 TempY;
主控制单元 20,根据室外环境温度值 TempX确定室外风机转速的调节区 间, 并确定室外风机在调节区间中的初始档位值 N1 , 根据室外冷凝器盘管温 度值 TempY与预设的参考温度 Tempi和 Temp2进行比较, 确定室外风机在 调节区间内的转速调整档位值 N2, 根据初始档位值 N1或调整档位值 N2输 出对应的转速指令到风机驱动单元;
风机驱动单元 40, 用于根据所述控制指令驱动室外风机负载, 以调整室 外风机按对应的转速运行。
参见图 1 所示, 本发明实施例中, 空调室外风机的控制电路还可包括过 零信号检测单元 50和室外风机负载单元 60。 其中, 过零信号检测单元 50的 作用在于获取电源的过零触发时间,以便主控制单元 20控制风机驱动单元 40 工作。 室外环境温度检测单元 10和冷凝器管温检测单元 30可包括温度传感 器。 这些传感器依先后顺序获取到温度信号之后即发送至主控制单元 20, 以 供主控制单元 20判断是否需要调整室外风机的档位。 主控制单元 20根据室 外环境温度检测单元 10检测到的室外环境温度值确定室外风机在初次进入制 冷模式时的风速档位值, 并运行一个预设时间。 在该预设时间过后, 冷凝器 管温检测单元 30检测冷凝器盘管温度, 并发送给主控制单元 20, 主控制单元 20根据冷凝器管温检测单元 30发送的温度信号判断室外冷凝器盘管温度是否 在一个预设范围 (例如 > 33°C < 46°C ) 内, 如果是, 则保持室外风机档位不 动, 如果否, 则产生控制指令, 控制风机驱动单元 40工作, 由风机驱动单元 40输出电压信号至室外风机负载单元,驱动室外风机负载单元 60调整室外风 机的档位。
本发明实施例通过利用 TempX获取室外风机转速的调节区间和转速初档 值, 再利用 Temp Y对区间内的转速进行细调, 达到快速调节室外风机转速的 目的。 进而实现在室外环境温度很低情况下的制冷需求, 提升制冷效果并避 免在低负荷制冷损坏压缩机, 解决现有的空调器在低温制冷时所存在的制冷 效果差且会损坏压缩机的问题。 本发明可满足空调器在低温环境下正常使用, 相比于其它的控制方法和调速装置, 成本低, 系统更加稳定, 室外风量的调 整平稳有序, 室外风机的转速有序调整使得传感器的温度变化小而不会导致 室外风机的转速聚变, 可以实现室外环境温度从 -20 °C到 55 °C的超宽制冷范 围。
本发明实施例中,上述主控制单元 20还用于控制空调室外风机在启动时, 在检测 TempX前, 以预设转速运行一预设时间 T1 , 其取值范围为 5-60秒。 空调室外风机在启动时, 以预设转速运行一预设时间 T1 , 其取值范围为 5-60 秒, 让冷凝器充分换热后 TempY趋于稳定。 其预设转速可以选择为偏近最高 档的转速或者最高档转速, 其原则为在启动时顺畅运行起来, 防止因低转速 启动时风机电机电流过大而损坏电机。 如前述实施例中风机档位共有 15档, 在本实施例中可以选择为第 15档或者第 13档、 第 14档等。
进一步的, 主控制单元 20还用于控制空调室外风机在检测 TempY之前 以当前档位转速运行一预设时间 T2, 其取值范围为 5-60秒。 这样可以让控制 系统不断的重复检测, 随着 TempX, TempY的变化自动判断和调节档位, 达 到最佳的使用效果。
参见图 2, 本发明一较佳实施例中, 空调室外风机的控制电路还可包括: 跳线检测单元 70, 用以获取当前输入电源频率值, 并确定当前机型值输出至 主控制单元 20,以便主控制单元 20根据不同机型确定室外风机每个风速档位 的不同室外风机转速值。
进一步的, 在一实施方案中, 上述空调室外风机的控制电路还包括: 四 通阀工作状态检测单元 80, 用以检测空调器四通阀的工作状态以确定空调器 的工作模式, 当空调器为制冷模式时才启用本发明所述室外风机控制方法, 当为制热模式时, 不启用本发明所述室外风机控制方法。 由于设置有四通阀 工作状态检测单元 80, 本发明空调室外风机的控制电路可根据空调器的工作 模式进行工作, 避免在制热模式下也对空调器进行上述控制, 造成能源消耗。
更进一步的, 上述空调室外风机的控制电路还可包括 LED显示单元 90, 该 LED显示单元 90中设有 LED灯, 用以显示空调器在工作过程中的故障信 息。 由于设置有 LED显示单元 90, 本发明空调室外风机的控制电路可显示故 障信息, 以便用户维护空调。
具体的, 本发明实施例中, 空调室外风机的控制电路的工作过程可包括: 首先, 在室外风机开始启动时, 跳线检测单元 70获取当前输入电源频率 值并确定当前空调器机型值。 然后, 四通阀工作状态检测单元 80判断四通阀 是否上电, 如果是, 则启动室外风机先全速运行预设时间间隔 T1 50秒, 让冷 凝器充分换热后 TempY趋于稳定, 再通过室外环境温度检测单元 10检测室 外环境温度 TempX, 主控制单元 20根据该室外环境温度 TempX控制室外风 机进入初始档位值 Nl。 室外风机在初始档位运行一预设的时间间隔 T2,此时 计时判断单元 50计时并判断是否达到预设时间间隔 T2(预设的时间间隔可以 设定为 50秒, 也根据不同的实际需要可以设置预设时间间隔为其他时间值), 如果是, 则冷凝器管温检测单元 30检测室外冷凝器盘管温度值 TempY, 主控 单元 20比较室外冷凝器盘管温度值 TempY和参考温度 Tempi和 Temp2, 如 果 Tempi ¾≡TempY¾≡Temp2, 则主控制单元 20对室外风机转速档位不做调整。 如果 TempY<Templ时, 则主控制单元 20对室外风机档位降低一档, 如果已 经达到调节区间内的最低档位值不再调整。如果 TempY>Templ时, 则主控制 单元 20对室外风机档位上升一档, 如果已经达到调节区间内的最高档位值不 再调整。 主控单元 20每次对室外风机档位进行调整后, 室外风机以当前档位 转速运行预设时间间隔 T2 50秒, 比较冷凝器盘管温度值 TempY和参考温度 Tempi和 Temp2进行以上的判断来调整室外风机转速档位, 让控制系统不断 的重复检测, 随着 TempX, TempY的变化自动判断和调节档位, 达到最佳的 使用效果。
第一参考温度 Tempi和第二参考温度 Temp2大小关系为: Templ<Temp2 , 且 5 °C ¾≡ Temp2-Templ¾≡20°C , 避免这两个参考温度值不会因相差太小如 2°C 以下时引起对室外风机档位的频繁调整次数过多, 或者两个参考温度相差太 大时室外风机档位调整太少失去本发明的效果。 在本实施例中, 第一参考温 度 Tempi设为 33 °C , 第二参考温度 Temp2设为 46°C; 而在本发明其他实施 例中,根据不同的实际需要可以设置 Tempi和 Temp2为其他温度值。 Tempi 和 Temp2, 范围为 15 °C-50°C。
室外机通过四通阀是否上电判断是否为制冷模式, 当为制冷模式下启动 本发明空调室外风机的控制电路, 室外风机先全速运行 50秒后根据室外环境 温度值 TempX进入初始档位。 具体的, 本发明一实施例中, 初始档位规则如 下表 1所示:
Figure imgf000009_0001
表 1
由表 1可知, 当 TempX越高时, 室外风机的初始档位值越大, 如 7°C < TempX < ll °C时, 室外风机初始档位值是 7, 当 11 °C TempX < 15°C时, 室外 风机的初始档位值是 9。 当 TempX越低时, 室外风机的初始档位值越小, 如 -8°C < TempX < -2°C时, 室外风机初始档位值是 4,当 -13 °C TempX < -8°C 时, 室外风机的初始档位值是 3。
运行 50秒的全速风档后, 室外风机转速将按照室外环境温度值 TempX, 首次进入初始风档, 之后再根据冷凝器盘管温度值 TempY的变化作出调整。
本发明一实施例中, 可根据室外环境温度设置调整区间, 在获取到室外 冷凝器盘管温度值 TempY和室外环境温度值 TempX后, 根据室外环境温度 值 TempX所处的区间每隔 50秒通过比较室外冷凝器盘管温度值 TempY与第 一参考温度 Tempi 33°C和第二参考温度 Temp2 46°C的大小调整室外风机档 位。 参见下表 2, 室外风机的档位和环境区间的对应关系可以是:
1 )判断 TempY温度, 当 TempY满足 33°C < TempY < 46 °C , 室外风机 就不调整风档, 稳定运行。
2 ) 不满足的时候只能在 TempX 区间对应的档数选择上升或下降, 转速 档位变化时只能逐级上升或逐级下降。
3 )如果 TempY温度升高超过此范围, 则风档升高, 直到升高到此室外 环境温度值 TempX档位调节区间内的档位最大值不做调整; 如果 TempY温 度降低低于此范围, 则风速档位降低, 直到降低到此档位调节区间内的档位 最小值不做调整。
如室外环境温度值 TempX为 2°C时由表 1可知处于 -2°C < TempX < 3 °C对 应的区间, 室外风机的初始档位值是 5, 由表 2可知处于 -2°C < TempX < 3 °C 对应的区间, 室外风机在此区间内的档位值有 3/4/5/6/7/8, 每隔 50秒检测一 次冷凝器盘管温度值 TempY, 如果 33°C < TempY < 46 °C , 则风速维持第 5档 不变。 如果 TempY<33°C , 则室外风机下降一档到 4, 如果已经下降到此区间 内的最低档 3, 则室外风机档位不再下降。 如果 TempY>46°C , 则室外风机上 升一档到 6,如果已经上升到此区间内的最高档 8,则室外风机档位不再上升。 表 2
Figure imgf000011_0001
从表 1和表 2可以看出, 室外风机的初始档位值位于对应的调节区间内 的中间档位值或偏近中间档位, 这样室外风机通过室外环境温度值 TempX进 入了初始档位值, 再根据冷凝器盘管温度值 TempY温度值进行调节区间内档 位调整时, 可以快速的在区间内调整到目标档位值。 如在表 1 中当 -13 °C TempX < -8°C时确定的初始档位值是 3 , 在表 4 中根据 -13 °C TempX < -8 °。确定在此区间中的调节档位档位值为 1/2/3/4/5 , 由表 1和表 2可以看出, 当 -13 °C < TempX < -8°C时确定的初始档位值 3 ,处于由表 4根据 -13 °C < TempX < -8 °C确定调节档位值 1/2/3/4/5中的中间档位值, 然后根据 TempY温度值可 以快速的向低档位调整到 2档或 1档, 或者向高档位调整到 4档或 5档。
在本发明实施例中, 当空调器接收到关机信号关机或断电时, 则上述控 制电路的控制进程也随之结束。
本发明所述的室外风机电机可以是交流电机, 也可以是直流电机。 当室 外风机电机是交流电机时, 电机驱动单元可以通过调节交流电机输入电压的 方式调整电机的转速到以上描述中室外风机档位对应的转速值; 当室外风机 电机是直流电机时, 电机驱动单元可以通过调整控制直流电机的 PWM (脉宽 调制)的方式来方便调整直流电机转速, 能方便的将直流电机的转速调整到以 上描述中室外风机档位对应的转速值。
本发明所述的风机档位范围为 3-20档, 优选为 5-15档。 在本实施例中总 共有 15档, 档位值越大, 对应的转速值越高。 档位数值也可以根据空调实际 运行情况确定为其他的数值, 如 5档、 6档、 20档等。 每档的转速值可以根 据空调的实际运行需求确定。 本实施例中每档的室外风机转速值占室外风机 最大转速的比例如下表: 室外风机档位 1档 2档 3档 4档 5档 6档 7档 8档 占最大转速比例 6% 13% 22% 29% 35% 41% 47% 54% 室外风机档位 9档 10档 11档 12档 13档 14档 15档
占最大转速比例 60% 70% 75% 80% 85% 90% 95%
本发明还提供一种空调, 其至少包括室外机冷凝器、 室外风机, 还包括 前述空调室外风机的控制电路。 该控制电路的结构和工作原理可参见附图 1、 2及其对应的实施例,在此不作详述。由于具有前述空调室外风机的控制电路, 本发明空调可满足空调器在低温环境下正常使用, 相比于其它的控制方法和 调速装置, 成本低, 系统更加稳定, 室外风量的调整平稳有序, 室外风机的 转速有序调整使得传感器的温度变化小而不会导致室外风机的转速聚变, 可 以实现室外环境温度从 -20 °C到 55 °C的超宽制冷范围。
本发明还提供一种空调室外风机的控制方法, 该方法可基于前述空调室 外风机的控制电路实现。 参见图 3所示, 在一实施例中, 该方法包括以下步 骤:
步骤 S10, 在空调器室外风机运转时检测室外环境温度值 TempX;
步骤 S20, 根据室外环境温度值 TempX确定室外风机转速的调节区间, 输出控制指令确定室外风机在调节区间中的初始档位值 N1 , 并控制室外风机 按 N1档位的对应转速运行;
步骤 S30, 在空调器室外风机运转时检测室外冷凝器盘管温度值 TempY, 将检测到的室外冷凝器盘管温度值 TempY与预设的参考温度 Tempi和 Temp2 进行比较, 在调节区间内调整室外风机的转速档位以获得调整档位值 N2: 当 Tempi < TempY < Temp2时, 对室外风机转速档位不做调整; 当 TempY<Templ时,对室外风机档位降低一档,如果已经达到调节区间 内的最低档位值不再调整。
当 TempY>Temp2时,对室外风机档位上升一档,如果已经达到调节区间 内的最高档位值不再调整。
步骤 S40, 根据转速调整档位值 N2控制室外风机按对应转速运行。
本实施例中, 可通过主控制单元将空调室外风机的风速分成多个(例如 5-20个)预设档位。 室外环境温度值 TempX越高, 由 TempX确定的室外风 机初始档位初始值 N1越大, 室外风机转速越大; 室外环境温度值 TempX越 低, 由 TempX确定的室外风机初始档位初始值 N1越小, 室外风机转速越低。
进一步的, 本发明实施例中, 每隔一个预设时间检测一次室外冷凝器盘 管温度, 然后判断室外冷凝器盘管温度是否在一个预设范围内, 如果在此范 围内, 则主控制单元控制风速档位不做调整; 如果室外冷凝器盘管温度升高 超过预设范围, 则主控制单元控制室外风机转速档位升高一档, 直到升高到 此档位调节区间内的档位最大值不做调整; 如果室外冷凝器盘管温度降低低 于此范围, 则室外风机转速档位降低一档, 直到降低到此档位调节区间内的 档位最小值不做调整。
前述方法流程中, 在步骤 A之前还可包括:
空调室外风机在启动时, 以预设转速运行一预设时间 T1 , 其取值范围为 5-60秒, 让冷凝器充分换热后 TempY趋于稳定。 其预设转速可以选择为偏近 最高档的转速或者最高档转速, 其原则为在启动时顺畅运行起来, 防止因低 转速启动时风机电机电流过大而损坏电机。 如前述实施例中风机档位共有 15 档, 在本实施例中可以选择为第 15档或者第 13档、 第 14档等。
进一步的, 在步骤 C之前还可包括:
室外风机以当前档位转速运行一预设时间 T2, 其取值范围为 5-60秒。 让 控制系统不断的重复检测,随着 TempX, TempY的变化自动判断和调节档位, 达到最佳的使用效果。
在本发明实施例中, 通过室外环境温度和室外冷凝器盘管温度控制室外 交流室外风机转速以调整空调冷凝器的风量, 在开机后对室外环境温度判断 所述室外环境温度初次进入制冷模式时的风速档位值, 并运行一个预设时间, 再判断室外冷凝器盘管温度是否在一个预设范围内, 再对风速档位进行档位 升高或降低调整, 以满足室外环境温度 4艮低下的制冷需求。 与现有技术相比, 本发明空调室外风机的控制方法专门为低温制冷空调设计, 满足空调在低温 环境下正常使用, 相比于其它的控制方法和调速装置, 成本低, 系统更加稳 定, 室外风量的调整平稳有序, 室外风机的转速有序调整使得传感器的温度 变化小而不会导致室外风机的转速聚变, 可以实现室外环境温度从 -20°C到 55 °C的超宽制冷范围。
前述实施例中, 在执行所述将检测到的室外冷凝器盘管温度与预设的参 考温度进行比较之前包括: 预设第一参考温度 Tempi (例如 33°C )和第二参 考温度 Temp2 (例如 46°C ) , 所述第二参考温度 Temp2的值大于所述第一参 考温度 Templ。 应当说明的是, 33°C和 46°C只是本发明的一个优选实施例中 的温度值, 在本发明其他实施例中, 根据不同的实际需要可以设置 TempY温 度预设范围为其他温度值, 例如 Tempi和 Temp2的取值范围可以为: 15°C-50
°C。
本发明一优选实施例中, 在执行步骤 S30之前还包括:
获取当前输入电源频率值, 并确定当前机型值, 以便主控制单元根据机 型输出控制指令调节室外风机转速。
检测空调器四通阀的工作状态以确定空调器的工作模式。 具体的, 四通 阀不通电状态下表示为制冷模式, 启用本发明所述室外风机控制方法, 四通 阀通电状态下表示为制热模式, 室外风机按空调原有的控制方法运行。 由于 设置有四通阀工作状态检测单元 80, 本发明空调室外风机的控制电路可根据 空调器的工作模式进行工作, 避免在制热模式下也对空调器进行上述控制, 造成能源消耗。
显示空调器在工作过程中的故障信息。 由于设置有 LED显示单元, 本发 明空调室外风机的控制电路可显示故障信息, 以便用户维护空调。
参见图 4, 本发明一较佳实施例中, 上述空调室外风机的控制方法流程可 包括以下步骤:
步骤 S 1 , 室外风机启动时获取当前输入电源频率值并确定当前机型值; 步骤 S2, 判断四通阀是否上电, 如果否则执行步骤 S3 , 如果是不启动空 调室外风机的控制电路, 结束本发明空调室外风机的控制方法流程。
步骤 S3 , 室外风机先全速运行 50秒, 再检测室外环境温度值 TempX, 根据该室外环境温度值 TempX确定初始档位值。
步骤 S4, 室外风机以当前档位值运行 50秒。
步骤 S5, 比较冷凝器盘管温度值 TempY和第一预设温度 Tempi和第二 预设温度 Temp2值的大小, 如果 Tempi < TempY < Temp2时, 对室外风机转 速档位不做调整, 并跳转至步骤 S4。 否则进入步骤 S6。
步骤 S6, 如果 TempY<Templ时, 判断室外风机档位是否已经达到最低 一档, 如果否则降低一档, 是则不再调整, 并进入跳转至步骤 S4。 否则进入 步骤 S7。
步骤 S7, 如果 TempY>Templ时, 判断室外风机档位是否已经达到最高 档位, 如果否则上升一档, 是则不再调整, 并进入步骤 S4。 否则跳转至步骤 S4。
本发明还提供一种空调器, 该空调器的原理图可在现有空调上增加控制 器基于本发明的控制方法去实现低温制冷功能, 有利于在原机型上进行升级 改造。 参见图 5所示。 图中空调系统包括依次相连的压缩机 1 , 四通阀 2, 室 外换热器 4, 室外风机 3 , 室外机控制电路主板 6, 本发明所述的室外机控制 电路板 7, 节流装置 5 , 室内换热器 9, 室内风机 8。 室外机主板 6和室外机 控制电路板 7可以对室外风机 3的转速进行调节, 从而调节室外换热器 4的 换热量。 所述的室外机控制电路板 7还包括室外环境温度检测单元 71 , 室外 换热器冷凝温度检测单元 72。所述室外环境温度检测单元 71去获取室外环境 温度值 TempX。 所述室外换热器冷凝温度检测单元 72获取冷凝器盘管温度 TempY, 安装在冷凝器上。
例如, 如果需要在一款空调上增加低温制冷功能, 在增加低温制冷功能 以前, 原空调的室外机控制电路主板 6直接接室外风机控制线, 输出风机驱 动信号控制室外风机运行, 此时就只需要将室外机控制电路主板 6与室外机 控制电路板 7连接, 室外机控制电路板 7上的室外环境温度检测单元(室外 环境温度感温包) 71安装好放在冷凝器后面, 将室外换热器冷凝温度检测单 元(室外换热器冷凝温度感温包) 72安装在冷凝器上, 将室外风机控制线插 到室外机控制电路板 7上。 室外机控制电路板 7将根据本发明的技术方案去 实现低温制冷功能, 稳定快, 所需时间短。 以上仅为本发明的优选实施例, 并非因此限制本发明的专利范围, 凡是 利用本发明说明书及附图内容所作的等效结构或等效流程变换, 或直接或间 接运用在其他相关的技术领域, 均同理包括在本发明的专利保护范围内。

Claims

1、 一种空调室外风机的控制电路, 其特征在于, 包括:
室外环境温度检测单元, 用于在空调器室外风机运转时检测室外环境温 度值 TempX;
冷凝器管温检测单元, 用于在空调器室外风机运转时检测室外冷凝器盘 管温度值 TempY;
主控制单元, 根据室外环境温度值 TempX确定室外风机转速的调节区 间,并确定室外风机在调节区间中的初始档位值 N1 ,根据室外冷凝器盘管温 度值 TempY与预设的参考温度 Tempi和 Temp2进行比较, 确定室外风机在 调节区间内的转速调整档位值 N2, 根据初始档位值 N1或调整档位值 N2输 出对应的转速指令到风机驱动单元;
风机驱动单元, 用于根据所述控制指令驱动室外风机负载, 以调整室外 风机按对应的转速运行。
2、如权利要求 1所述的空调室外风机的控制电路, 其特征在于, 所述主 控制单元还用于控制空调室外风机在启动时,在检测 TempX前, 以预设转速 运行一预设时间 Tl , T1的取值范围为 5-60秒。
3、如权利要求 1所述的空调室外风机的控制电路, 其特征在于, 所述主 控制单元还用于控制空调室外风机在检测 TempY之前以当前档位转速运行 一预设时间 T2, 其取值范围为 5-60秒。
4、 如权利要求 1 所述的空调室外风机的控制电路, 其特征在于, 所述 Tempi 值的范围为:15 °C -50 °C ,Temp2 值的范围为: 15 °C -50 °C ,且
Temp2>Templ„
5、 如权利要求 4所述的空调室外风机的控制电路, 其特征在于, Tempi 值和 Temp2值取值范围为: 5 °C ¾≡ Temp2-Templ¾≡20°C。
6、如权利要求 5所述的空调室外风机的控制电路,其特征在于,还包括: 四通阀工作状态检测单元, 用以检测空调器四通阀的工作状态以确定空 调器的工作模式。
7、 一种空调器, 包括室外机冷凝器、 室外风机, 其特征在于, 还包括空 调室外风机的控制电路, 该空调室外风机的控制电路包括:
室外环境温度检测单元, 用于在空调器室外风机运转时检测室外环境温 度值 TempX;
冷凝器管温检测单元, 用于在空调器室外风机运转时检测室外冷凝器盘 管温度值 TempY;
主控制单元, 根据室外环境温度值 TempX确定室外风机转速的调节区 间,并确定室外风机在调节区间中的初始档位值 N1 ,根据室外冷凝器盘管温 度值 TempY与预设的参考温度 Tempi和 Temp2进行比较, 确定室外风机在 调节区间内的转速调整档位值 N2, 根据初始档位值 N1或调整档位值 N2输 出对应的转速指令到风机驱动单元;
风机驱动单元, 用于根据所述控制指令驱动室外风机负载, 以调整室外 风机按对应的转速运行。
8、如权利要求 7所述的空调器,其特征在于,所述 Tempi值的范围为: 15 °C -50 °C ,Temp2值的范围为: 15 °C -50°C,且 Temp2>Templ。
9、 一种空调的室外风机控制方法, 其特征在于, 包括以下步骤:
A.在空调器室外风机运转时检测室外环境温度值 TempX;
B.根据室外环境温度值 TempX确定室外风机转速的调节区间,输出控制 指令确定室外风机在调节区间中的初始档位值 N1 , 并控制室外风机按 N1档 位的对应转速运行;
C.在空调器室外风机运转时检测室外冷凝器盘管温度值 TempY, 将检测 到的室外冷凝器盘管温度值 TempY与预设的参考温度 Tempi和 Temp2进行 比较, 在调节区间内调整室外风机的转速档位以获得调整档位值 N2:
当 Tempi < TempY < Temp2时, 对室外风机转速档位不做调整; 当 TempY<Templ时, 对室外风机档位降低一档, 如果已经达到调节区 间内的最低档位值不再调整。 当 TempY>Temp2时, 对室外风机档位上升一档, 如果已经达到调节区 间内的最高档位值不再调整。
D.根据转速调整档位值 N2控制室外风机按对应转速运行。
10、 如权利要求 9所述的室外风机控制方法, 其特征在于, 当室外环境 温度值 TempX越大时, 所述调节区间内的初始档位值 N1越大, 当 TempX 越小时, 所述的调节区间内的初始档位值 N1越小。
11、 如权利要求 10所述的室外风机控制方法, 其特征在于, 根据室外环 境温度值确定室外风机转速的调节区间并输出室外风机的初始档位值 N1时, 其初始档位值 N1位于调节区间内档位的中间档位值或偏近中间档位值。
12、 如权利要求 9所述的室外风机控制方法, 其特征在于, 在步骤 A之 前还包括:
空调室外风机在启动时, 以预设转速运行一预设时间 T1 , 其取值范围为
5-60秒。
13、 如权利要求 9所述的室外风机控制方法, 其特征在于, 在步骤 C之 前还包括:
室外风机以当前档位转速运行一预设时间 T2, T2的取值范围为 5-60秒。
14、 如权利要求 9所述的室外风机控制方法, 其特征在于, 所述 Tempi 的范围:15°C-50°C,Temp2的范围: 15°C-50°C,且 Temp2>Templ。
15、 如权利要求 9所述的空调的室外风机控制方法, 其特征在于, 在空 调器室外风机运转时检测室外环境温度值 TempX之前还包括:
检测空调器四通阀的工作状态以确定空调器的工作模式。
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CN115523642B (zh) * 2022-09-19 2023-10-27 珠海格力电器股份有限公司 空调的控制方法、装置及系统
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