WO2023273351A1 - 一种用于冰箱制冷的四线风机控制方法及冰箱 - Google Patents

一种用于冰箱制冷的四线风机控制方法及冰箱 Download PDF

Info

Publication number
WO2023273351A1
WO2023273351A1 PCT/CN2022/075520 CN2022075520W WO2023273351A1 WO 2023273351 A1 WO2023273351 A1 WO 2023273351A1 CN 2022075520 W CN2022075520 W CN 2022075520W WO 2023273351 A1 WO2023273351 A1 WO 2023273351A1
Authority
WO
WIPO (PCT)
Prior art keywords
wire fan
fan
wire
stop
speed
Prior art date
Application number
PCT/CN2022/075520
Other languages
English (en)
French (fr)
Inventor
苏翔飞
李涛
侯建国
Original Assignee
青岛海尔电冰箱有限公司
海尔智家股份有限公司
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 青岛海尔电冰箱有限公司, 海尔智家股份有限公司 filed Critical 青岛海尔电冰箱有限公司
Publication of WO2023273351A1 publication Critical patent/WO2023273351A1/zh

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • 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

Definitions

  • the invention relates to the technical field of a four-wire fan for refrigerators, in particular to a control method for a four-wire fan used for refrigeration of a refrigerator and a refrigerator.
  • the four-wire fan is a type of four-wire fan commonly used in refrigerators. As shown in Figure 1, the general four-wire fan includes the input of power control signal, PWM (Pulse Width Modulation, Pulse Width Modulation) signal and feedback signal. The four-wire fan is controlled through the signal input of the main control circuit and the feedback signal of the four-wire fan. The fault and speed regulation control of this four-wire fan needs to be further improved.
  • PWM Pulse Width Modulation, Pulse Width Modulation
  • An object of the first aspect of the present invention is to provide a four-wire fan control method for refrigerator refrigeration, which can further improve the operation control process of the four-wire fan.
  • Another object of the present invention is to be able to realize timely fault handling of the four-wire fan.
  • An object of the second aspect of the present invention is to provide a refrigerator that implements the above-mentioned control method, capable of timely handling the failure of the four-wire fan.
  • the present invention provides a four-wire fan control method for refrigerator refrigeration, including:
  • the process of driving the four-wire fan into a failure operation mode includes:
  • the process of controlling the start and stop of the four-wire fan with a set start and stop cycle includes:
  • the process of controlling the start and stop of the four-wire fan with a set start and stop cycle further includes:
  • the third preset time period includes the fourth preset time period before the start-up time period, the start-up time period and A fifth preset time period after the start-up time period ends.
  • the process of driving the four-wire fan to start with a preset start-up process includes:
  • a start control signal is sent to the four-wire fan for controlling the four-wire fan to run at a preset test speed within a second preset time period after being powered on for the first preset time period.
  • the start control signal is a second PWM pulse signal with a duty cycle of 0 in the first preset time period and a duty cycle of 50% in the second preset time period.
  • the process of judging whether the four-wire fan fails according to the actual speed of the four-wire fan includes:
  • the process of driving the four-wire fan into a normal speed regulation mode includes:
  • the four-wire fan is driven to run at a set target speed.
  • the process of driving the four-wire fan to run at a set target speed includes:
  • the current actual speed of the motor is adjusted with a second step size as the change amount of the target speed, and the first step is longer than the second step long.
  • the present invention also provides a refrigerator, including: a controller, the controller includes a memory and a processor, wherein the memory stores a machine-executable program, and when the machine-executable program is executed by the processor, the A four-wire fan control method according to any one of the above.
  • the invention provides a method for controlling a four-wire fan of a refrigerator.
  • the four-wire fan is driven to execute a preset start-up process, and the feedback signal of the four-wire fan is used to judge whether it is faulty, and then the four-wire fan is controlled according to the judgment result. Enter different modes, and can enter the fault operation mode when it is judged that a fault occurs. After the fan is started, the fault is tested and eliminated first, and the fault of the fan can be dealt with in time, which further improves the operation control process of the four-wire fan, and is conducive to ensuring the normal operation of the fan.
  • the present invention sets a speed test process at the initial stage of starting the four-wire fan, so that fault conditions can be dealt with earlier, and the fault detection and elimination are carried out before the four-wire fan enters the normal speed regulation mode.
  • the present invention provides a specific fault handling method, by driving the four-wire fan to perform start-stop cycle control to deal with the fault, and adopting different processing procedures according to the response feedback results, so as to ensure that the fan can automatically complete the fault response And repair, and will not continue to operate with normal speed control in the fault state, resulting in damage to the fan caused by the continuation or aggravation of the fault of the fan.
  • setting the second threshold in the present invention can realize multi-stage speed regulation of the fan, that is, control the adjustment step according to the absolute value of the difference between the current actual speed of the fan and the target speed, so that the speed regulation process of the fan More reasonable and efficient.
  • Fig. 1 is a connection schematic diagram of a four-wire fan and its control circuit in the prior art
  • Fig. 2 is a flowchart of a four-wire fan control method according to an embodiment of the present invention
  • FIG. 3 is a control signal diagram corresponding to a four-wire fan control method according to an embodiment of the present invention.
  • Fig. 4 is a flow chart of executing a failure operation mode in a method for controlling a four-wire fan of a refrigerator according to an embodiment of the present invention
  • Fig. 5 is a control signal diagram corresponding to a faulty operation mode in a method for controlling a four-wire fan of a refrigerator according to an embodiment of the present invention
  • Fig. 6 is a flow chart of executing a normal speed regulation mode in a method for controlling a four-wire fan of a refrigerator according to an embodiment of the present invention.
  • Fig. 2 is a flowchart of a four-wire fan control method according to an embodiment of the present invention.
  • the four-wire fan in the present invention is a four-wire fan for refrigeration and air supply of an air-cooled refrigerator.
  • the present invention provides a four-wire fan control method for refrigerator refrigeration, as shown in Figure 2, in one embodiment, the four-wire fan control method includes:
  • Step S100 drive the four-wire fan to start with a preset start-up procedure.
  • Step S200 obtaining the feedback signal of the four-wire fan, and determining the actual rotational speed Rn of the four-wire fan according to the feedback signal.
  • the speed information here can be the direct speed of the fan, or indirect information related to the speed, such as the number of pulses fed back by the fan, which is converted into the speed of the fan through the number of pulses.
  • the speed of the four-wire fan is calculated according to the number of pulses fed back by the PWM four-wire fan (that is, the four-wire fan of the present application) to the main control circuit through the feedback circuit in FIG.
  • the total pulse number of feedback is 100, and the corresponding speed is 300RPM.
  • Step S300 according to the actual speed Rn of the four-wire fan, it is judged whether the four-wire fan is faulty, if so, go to step S400, otherwise go to step S500.
  • Step S400 driving the four-wire fan to enter the failure operation mode.
  • Step S500 drive the four-wire fan to enter the normal speed regulation mode.
  • This embodiment provides a method for controlling a four-wire fan of a refrigerator.
  • the four-wire fan is driven to execute a preset start-up process, and the feedback signal of the four-wire fan is used to determine whether it is faulty, and then the four-wire fan is controlled according to the judgment result.
  • the fan enters different modes, and can enter the fault operation mode when it is judged that a fault occurs. That is to say, in this embodiment, after the fan is started, the fault is tested and eliminated first, so that the fault of the fan can be dealt with in time, and the operation control process of the four-wire fan is further improved, which is conducive to ensuring the normal operation of the fan.
  • step S100 includes:
  • a start control signal is sent to the four-wire fan for controlling the four-wire fan to run at a preset test speed within a second preset time period t2 after the first preset time period t1 after being powered on.
  • Fig. 3 is a control signal diagram corresponding to a four-wire fan control method according to an embodiment of the present invention.
  • the power-on signal here may be a VCC signal that is always at a high voltage.
  • the start control signal is a second PWM pulse signal with a duty cycle of 0 in the first preset time period t1 and a duty cycle of 50% in the second preset time length t2.
  • the first preset duration t1 is any value in 2-5s, such as 2s, 3s or 5s.
  • the second preset duration t2 is a value in 8-12s, such as 8s, 10s or 12s.
  • a rotation speed test process is set at the initial stage of the start-up of the four-wire fan, so fault conditions can be dealt with earlier, and the fault detection and elimination are carried out before the four-wire fan enters the normal speed regulation mode.
  • step S300 includes:
  • the magnitude of the normal rotational speed threshold can be calibrated according to the second preset time length t2 and the duty cycle within the second preset time length t2. For example, when the second preset duration t2 is 10s and the duty cycle is 50%, the normal speed threshold is 300RPM.
  • This embodiment provides a specific fault judgment method, which can complete its own fault judgment through the number of pulses fed back by the four-wire fan, which is simple and easy to implement.
  • Fig. 4 is a flow chart of executing a failure operation mode in a method for controlling a four-wire fan of a refrigerator according to an embodiment of the present invention.
  • step S400 includes:
  • Step S402 control the start and stop of the four-wire fan with the set start-stop cycle T, wherein the start-stop cycle T includes the set stop time t4 and the start-up time t5.
  • Step S404 in the start-up period t5 of the start-stop cycle T, judge whether the fault is eliminated according to the actual speed Rn of the four-wire fan; if so, execute step S406; otherwise, execute step S408 and step S410.
  • Step S406 exit the failure operation mode, and drive the four-wire fan to enter the normal speed regulation mode.
  • Step S408 repeatedly controlling the four-wire fan to start and stop according to the start-stop cycle T, and if the continuous repetition times of the start-stop cycle T exceeds the preset threshold n, control the four-wire fan to stop.
  • Step S410 timing the failure shutdown, and driving the four-wire fan to enter the failure operation mode again when the timing time reaches the shutdown threshold t3, that is, return to step S402.
  • Fig. 5 is a control signal diagram corresponding to a failure operation mode in a method for controlling a four-wire fan of a refrigerator according to an embodiment of the present invention. As shown in FIG. 5, in this embodiment, step S402 includes:
  • step S402 also includes:
  • the third preset time period t7 includes the fourth preset time period before the start-up time period, the start-up time period, and the fifth time period after the start-up time period ends. Set duration.
  • the four-wire fan is controlled to be turned off during periods other than the third preset period (ie, the stop period t6 ) in each start-stop cycle.
  • the shutdown duration t4 is 50s
  • the startup duration t5 is 10s
  • the third preset duration t7 is 16s
  • the shutdown duration t6 is 44s
  • both the fourth preset duration and the fifth preset duration are 3s.
  • VCC is on, PWM output is 0; 3-47 seconds: VCC is off, PWM output is 0; 47-50 seconds: VCC is on, PWM output is 0; 50-60 seconds: VCC is on, PWM output is 50 %.
  • the corresponding preset threshold value n is taken as 10, when the four-wire fan is started in the current start-stop cycle T, the start-up time is t5, that is, the total pulse within 10s If the number exceeds 100, that is, when the average speed within 10s is greater than 300RPM, it will be judged that the fault is eliminated, and then exit the fault allowable mode and enter the normal speed regulation mode. If the average speed in the current start-stop cycle T10s is less than or equal to 300RPM, enter the next one. Start-stop cycle T, if the continuous operation of 10 start-stop cycles T still does not meet the average speed within 10s greater than 300RPM, then control the four-wire fan to stop, for example, stop for 50 minutes, and enter the fault operation mode again after 50 minutes.
  • This embodiment provides a specific fault handling method, which responds to faults by driving the four-wire fan to perform start-stop cycle control, and adopts different processing procedures according to the response feedback results, so as to ensure that the fan can automatically complete the fault response and repair , and will not continue to operate with normal speed control in the fault state, resulting in damage to the fan caused by the continuation or aggravation of the fault of the fan.
  • the PWM signal is set to zero at the time tn, at this time the VCC signal is controlled to continue to run for t1', and then the VCC signal is set to If zero, power off the fans.
  • t1' can be set to 3s. If the fan meets the shutdown conditions, the fan will no longer judge the fault, and wait for the next startup to make a judgment. If there is a fault, keep the fault.
  • Fig. 6 is a flow chart of executing a normal speed regulation mode in a method for controlling a four-wire fan of a refrigerator according to an embodiment of the present invention. As shown in FIG. 6, in this embodiment, step S500 includes:
  • Step S502 obtaining the current actual rotational speed Rn and the target rotational speed Rt of the four-wire fan.
  • the current actual speed Rn of the four-wire fan can be converted according to the number of pulses fed back by the four-wire fan, and the target speed Rt can be a set value or calculated according to the demand of the current cooling mode.
  • Step S504 calculating the absolute value A of the difference between the current actual rotational speed Rn and the target rotational speed Rt of the four-wire fan.
  • Step S506 judge whether the absolute value A is greater than the first threshold A1, if yes, drive the four-wire fan to run at the set target speed Rt, otherwise return to step S502.
  • the first threshold A1 is 20RPM.
  • the absolute value A is less than the first threshold A1
  • the absolute value A is greater than the first threshold A1
  • the setting of the first threshold A1 can avoid the problem of frequent speed regulation of the fan when it is not necessary, resulting in unstable operation.
  • the step of driving the four-wire fan to run according to the set target speed Rt includes:
  • Step S508 judge whether the absolute value A is greater than the second threshold A2, if so, go to step S510, otherwise go to step S512, wherein the second threshold A2 is greater than the first threshold A1.
  • Step S510 using the first step as the change amount of the target rotational speed Rt to adjust the current actual rotational speed Rn of the motor.
  • Step S512 adjusting the current actual rotational speed Rn of the motor with the second step as the variation of the target rotational speed Rt, the first step being longer than the second step.
  • the multi-stage speed regulation of the fan can be realized, that is, the step size of the adjustment is controlled according to the absolute value A of the difference between the current actual speed Rn and the target speed Rt of the fan, so that the speed regulation of the fan The process is more reasonable and efficient.
  • the control when the difference between the current actual speed Rn and the target speed Rt of the fan is greater than 50RPM, the control reduces the first step every X seconds, for example, X is 2S, and the first step is 2RPM.
  • the control increases the first step every Y seconds, for example, if Y is 2S, the first step is 2RPM.
  • the time can be set freely in the specific setting, but the target speed Rt may be controlled by the parameters in the microcontroller, such as the modulus N to control the frequency of the PWM signal, and the duty ratio factor M to linearly adjust the PWM signal.
  • Duty cycle the above-mentioned first step length can be determined by setting the duty ratio factor M, and according to its corresponding rules, the first step length will have certain value characteristics.
  • the principle of speed regulation when the absolute value A is less than or equal to the second threshold A2 is the same as that of the absolute value A greater than the second threshold A2, but the size of the step is different. Since the absolute value A is smaller, a smaller step can be used. That is, the second step adjusts the four-wire fan, for example, 1RPM is set.
  • the present invention also provides a refrigerator, including a controller, the controller includes a memory and a processor, a control program is stored in the memory, and when the control program is executed by the processor, it is used to realize any of the above embodiments or a combination of the embodiments Four-wire fan control method.
  • the processor may be a central processing unit (CPU for short), or a digital processing unit, and the like.
  • the processor sends and receives data through the communication interface.
  • the memory is used to store programs executed by the processor.
  • the memory is any medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by the computer, and it can also be a combination of multiple memories.
  • the above-mentioned computing programs can be downloaded from a computer-readable storage medium to a corresponding computing/processing device or downloaded to a computer or an external storage device via a network (such as the Internet, a local area network, a wide area network, and/or a wireless network).
  • a network such as the Internet, a local area network, a wide area network, and/or a wireless network.
  • the fault is tested and eliminated first, and the fault of the fan can be dealt with in time, which further improves the operation control process of the four-wire fan, and is beneficial to ensure the normal operation of the fan.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

一种用于冰箱制冷的四线风机控制方法及冰箱，该控制方法包括：驱动四线风机以预设启动流程启动；获取四线风机的反馈信号，并根据反馈信号确定四线风机的实际转速Rn；根据四线风机的实际转速Rn判断四线风机是否出现故障；若是，则驱动四线风机进入故障运转模式；若否，则驱动四线风机进入正常调速模式。以及一种执行上述控制方法的冰箱，该四线风机控制方法及冰箱能够实现对四线风机的及时故障处理。

Description

一种用于冰箱制冷的四线风机控制方法及冰箱 技术领域
本发明涉及冰箱四线风机技术领域，特别是涉及一种用于冰箱制冷的四线风机控制方法及冰箱。
背景技术
随着智能冰箱和风冷冰箱的应用越来越普遍，冰箱中的冷冻四线风机和冷却四线风机的控制也变得越来越重要。
四线风机是冰箱常用的一种四线风机类型，如图1所示，一般的四线风机包括了电源控制信号、PWM(脉冲宽度调制，Pulse Width Modulation)信号和反馈信号3种信号的输入，通过主控电路的信号输入和四线风机的反馈信号来对四线风机进行控制。对于这种四线风机的故障和调速控制需要进一步完善。
发明内容
本发明第一方面的一个目的是要提供一种用于冰箱制冷的四线风机控制方法，能够进一步完善四线风机的运行控制过程。
本发明的另一个目的是要能够实现对四线风机的及时故障处理。
本发明第二方面的一个目的是要提供一种执行上述控制方法的冰箱，能够及时地对四线风机进行故障处理。
特别地，本发明提供了一种用于冰箱制冷的四线风机控制方法，包括：
驱动所述四线风机以预设启动流程启动；
获取所述四线风机的反馈信号，并根据所述反馈信号确定所述四线风机的实际转速；
根据所述四线风机的实际转速判断所述四线风机是否出现故障；
若是，则驱动所述四线风机进入故障运转模式；
若否，则驱动所述四线风机进入正常调速模式。
可选地，驱动所述四线风机进入故障运转模式的过程包括：
以设定的启停周期控制所述四线风机启停，其中所述启停周期包括设定停机时长以及启动时长；
在所述启停周期内的启动时长中，重新根据所述四线风机的实际转速判 断所述故障是否消除；
若是，则退出所述故障运转模式，并驱动所述四线风机进入所述正常调速模式；
若否，则重复按照所述启停周期控制所述四线风机启停，并且若所述启停周期的连续重复次数超过预设次数阈值的情况，控制所述四线风机停机，并对故障停机进行计时，并在计时时间达到停机阈值时驱动所述四线风机再次进入故障运转模式。
可选地，以设定的启停周期控制所述四线风机启停的过程包括：
发送具有所述启停周期的第一PWM脉冲信号至所述四线风机，以控制所述四线风机启停，其中所述第一PWM脉冲信号在所述启停周期内的停机时长内的占空比为0、在所述启停周期内的启动时长内的占空比为50％。
可选地，以设定的启停周期控制所述四线风机启停的过程还包括：
在每一所述启停周期内第三预设时长内控制所述四线风机上电，所述第三预设时长包括所述启动时长开始前的第四预设时长、所述启动时长以及所述启动时长结束后的第五预设时长。
可选地，驱动所述四线风机以预设启动流程启动的过程包括：
发送启动上电信号至所述四线风机，以控制所述四线风机上电；
同时发送启动控制信号至所述四线风机，用于控制所述四线风机在上电第一预设时长后的第二预设时长内以预设测试转速运行。
可选地，所述启动控制信号为所述第一预设时长内占空比为0、所述第二预设时长内占空比为50％的第二PWM脉冲信号。
可选地，根据所述四线风机的实际转速判断所述四线风机是否出现故障的过程包括：
当所述第二预设时长内的所述四线风机的实际转速小于正常转速阈值时判定所述四线风机出现故障。
可选地，驱动所述四线风机进入正常调速模式的过程包括：
获取所述四线风机的当前的实际转速和目标转速；
计算所述四线风机的当前的实际转速和所述目标转速的差值的绝对值，
当所述绝对值大于第一阈值时，驱动所述四线风机按照设定的目标转速运行。
可选地，驱动所述四线风机按照设定的目标转速运行的过程包括：
判断所述绝对值是否大于第二阈值，所述第二阈值大于所述第一阈值；
当所述绝对值大于所述第二阈值时，以第一步长作为所述目标转速的变化量调节所述电机的当前的实际转速；
当所述绝对值小于或等于所述第二阈值时，以第二步长作为所述目标转速的变化量调节所述电机的当前的实际转速，所述第一步长大于所述第二步长。
特别地，本发明还提供了一种冰箱，包括：控制器，所述控制器包括存储器和处理器，其中所述存储器存储有机器可执行程序，所述机器可执行程序被处理器执行时实现根据上述任意一项的四线风机控制方法。
本发明提供了一种冰箱的四线风机的控制方法，通过驱动四线风机执行预设启动流程，并通过四线风机的反馈信号来判断其自身是否出现故障，然后根据判断结果控制四线风机进入不同的模式，能够在判定出现故障时进入故障运转模式。在风机启动后先进行了故障的测试和排除，能够及时地对风机进行故障处理，进一步完善了四线风机的运行控制过程，有利于保证风机的正常运行。
进一步地，本发明在四线风机启动初期设置了一个转速测试过程，因此能够更早地应对故障状况，在四线风机进入正常调速模式之前就进行了故障检测和排除。
进一步地，本发明提供了一种具体的故障处理方法，通过驱动四线风机执行启停循环控制来应对故障，并根据应对反馈的结果采取不同的处理流程，从而保证风机能够自动完成故障的应对和修复，而不会在故障状态还继续以正常转速控制来运行，导致风机的故障继续或加重引起的对风机的损坏。
进一步地，本发明设置第二阈值能够实现风机的多级调速，即根据风机的当前的实际转速和目标转速的差值的绝对值的大小来控制调节的步长，使得风机的调速过程更合理高效。
根据下文结合附图对本发明具体实施例的详细描述，本领域技术人员将会更加明了本发明的上述以及其他目的、优点和特征。
附图说明
后文将参照附图以示例性而非限制性的方式详细描述本发明的一些具体实施例。附图中相同的附图标记标示了相同或类似的部件或部分。本领域 技术人员应该理解，这些附图未必是按比例绘制的。附图中：
图1是现有技术中的四线风机及其控制电路的连接示意图；
图2是根据本发明一个实施例的四线风机控制方法的流程图；
图3是根据本发明一个实施例的四线风机控制方法所对应的控制信号图；
图4是根据本发明一个实施例的冰箱四线风机的控制方法中的执行故障运转模式的流程图；
图5是根据本发明一个实施例的冰箱四线风机的控制方法中故障运转模式所对应的控制信号图；
图6是根据本发明一个实施例的冰箱四线风机的控制方法中的执行正常调速模式的流程图。
具体实施方式
图2是根据本发明一个实施例的四线风机控制方法的流程图。本发明中的四线风机是风冷冰箱的制冷送风四线风机。本发明提供了一种用于冰箱制冷的四线风机控制方法，如图2所示，一个实施例中，该四线风机控制方法包括：
步骤S100，驱动四线风机以预设启动流程启动。
步骤S200，获取四线风机的反馈信号，并根据反馈信号确定四线风机的实际转速Rn。这里的转速信息可以是直接的风机转速，也可以是间接的与转速相关的信息，例如风机反馈的脉冲数，通过脉冲数换算成风机转速。一个实施例中，根据图1中PWM四线风机(即本申请的四线风机)通过反馈电路向主控电路所反馈的脉冲数来计算四线风机的转速，例如四线风机在10s内风机反馈的总脉冲数为100，那对应的转速即为300RPM。
步骤S300，根据四线风机的实际转速Rn判断四线风机是否出现故障，若是，进入步骤S400，否则进入步骤S500。
步骤S400，驱动四线风机进入故障运转模式。
步骤S500，驱动四线风机进入正常调速模式。
本实施例提供了一种冰箱的四线风机的控制方法，通过驱动四线风机执行预设启动流程，并通过四线风机的反馈信号来判断其自身是否出现故障，然后根据判断结果控制四线风机进入不同的模式，能够在判定出现故障时进入故障运转模式。也就是说，本实施例在风机启动后先进行了故障的测试和 排除，能够及时地对风机进行故障处理，进一步完善了四线风机的运行控制过程，有利于保证风机的正常运行。
进一步的一个实施例中，步骤S100包括：
发送启动上电信号至四线风机，以控制四线风机上电；
同时发送启动控制信号至四线风机，用于控制四线风机在上电第一预设时长t1后的第二预设时长t2内以预设测试转速运行。
图3是根据本发明一个实施例的四线风机控制方法所对应的控制信号图。如图3所示，这里的启动上电信号可以是一直为高电压的VCC信号。启动控制信号为第一预设时长t1内占空比为0、第二预设时长t2内占空比为50％的第二PWM脉冲信号。可选地，第一预设时长t1为2-5s中的任一值，例如2s、3s或5s。第二预设时长t2为8-12s中的一值，例如8s、10s或12s。
本实施例在四线风机启动初期设置了一个转速测试过程，因此能够更早地应对故障状况，在四线风机进入正常调速模式之前就进行了故障检测和排除。
进一步的一个实施例中，步骤S300包括：
当第二预设时长t2内的四线风机的实际转速Rn小于正常转速阈值时判定四线风机出现故障，否则判定四线风机未出现故障。这里的正常转速阈值的大小可以根据第二预设时长t2以及第二预设时长t2内的占空比进行标定。例如当第二预设时长t2为10s、占空比为50％时，正常转速阈值为300RPM。
本实施例提供了一种具体的故障判定方法，通过四线风机反馈的脉冲数即可完成其自身的故障判定，该方式简单易行。
图4是根据本发明一个实施例的冰箱四线风机的控制方法中的执行故障运转模式的流程图。一个实施例中，如图4所示，步骤S400包括：
步骤S402，以设定的启停周期T控制四线风机启停，其中启停周期T包括设定停机时长t4以及启动时长t5。
步骤S404，在启停周期T内的启动时长t5中，重新根据四线风机的实际转速Rn判断故障是否消除；若是，执行步骤S406；否则执行步骤S408和步骤S410。
步骤S406，退出故障运转模式，并驱动四线风机进入正常调速模式。
步骤S408，重复按照启停周期T控制四线风机启停，并且若启停周期T 的连续重复次数超过预设次数阈值n的情况，控制四线风机停机。
步骤S410，对故障停机进行计时，并在计时时间达到停机阈值t3时驱动四线风机再次进入故障运转模式，即返回步骤S402。
图5是根据本发明一个实施例的冰箱四线风机的控制方法中故障运转模式所对应的控制信号图。如图5所示，本实施例中，步骤S402包括：
发送具有启停周期T的第一PWM脉冲信号至四线风机，以控制四线风机启停，其中第一PWM脉冲信号在启停周期T内的停机时长t4的占空比为0、在启停周期T内的启动时长t5内的占空比为50％。
如图5所示，进一步的一个实施例中，步骤S402还包括：
在每一启停周期内第三预设时长t7内控制四线风机上电，第三预设时长t7包括启动时长开始前的第四预设时长、启动时长以及启动时长结束后的第五预设时长。当然，如图5所示，在每一启停周期中除了第三预设时长的其他时长(即停机时长t6)则控制四线风机关闭。这样设置可以保证四线风机在启动前的一段时间内先上电，在启动结束后的一段时间内继续保持上电，即延迟下电，可以保证风机启动的稳定性，不会因还未稳定上电或突然下电而无法保证其稳定启动。一个实施例中，停机时长t4为50s，启动时长t5为10s，第三预设时长t7为16s，停机时长t6为44s，且第四预设时长和第五预设时长均为3s。也就是，0～3秒：VCC开，PWM输出0；3～47秒：VCC关，PWM输出0；47～50秒：VCC开，PWM输出0；50～60秒：VCC开，PWM输出50％。进一步地，对应于上述具体数值的第一PWM脉冲信号的实施例，相应的预设次数阈值n取为10，当四线风机在当前启停周期T的启动时长t5，即10s内的总脉冲数超过100，也即10s内的平均转速大于300RPM时就判定故障消除，进而退出故障允许模式，进入正常调速模式，若当前启停周期T10s内的平均转速小于或等于300RPM时就进入下一个启停周期T，若连续运行了10个启停周期T，仍然不满足10s内的平均转速大于300RPM则控制四线风机停机，例如停机50min，在50min后再次进入故障运转模式。
本实施例提供了一种具体的故障处理方法，通过驱动四线风机执行启停循环控制来应对故障，并根据应对反馈的结果采取不同的处理流程，从而保证风机能够自动完成故障的应对和修复，而不会在故障状态还继续以正常转速控制来运行，导致风机的故障继续或加重引起的对风机的损坏。
进一步地，如图3所示，当需要控制四线风机关机时，假设关机时刻为tn，那么在tn时刻将PWM信号置零，此时控制VCC信号继续运行t1’时长，再将VCC信号置零，对风机进行下电。t1’可以设置为3s。风机满足关机条件，风机不再判断故障，等下次开机再进行判断，如果有故障，保留故障。
图6是根据本发明一个实施例的冰箱四线风机的控制方法中的执行正常调速模式的流程图。如图6所示，本实施例中，步骤S500包括：
步骤S502，获取四线风机的当前的实际转速Rn和目标转速Rt。如前，四线风机的当前的实际转速Rn可以根据四线风机反馈的脉冲数换算得来，目标转速Rt可以是设定值或者根据当前制冷模式的需求计算得到。
步骤S504，计算四线风机的当前的实际转速Rn和目标转速Rt的差值的绝对值A。
步骤S506，判断绝对值A是否大于第一阈值A1，若是，驱动四线风机按照设定的目标转速Rt运行，否则返回步骤S502。
可选地，第一阈值A1为20RPM，当绝对值A小于第一阈值A1时，说明目标转速Rt和风机的当前的实际转速Rn的差值在允许或合理的范围内，即进入了稳态，不需要进行转速调节，而当绝对值A大于第一阈值A1时，说明风机的当前的实际转速Rn与目标转速Rt相差较大，即进入了暂态，需要进行转速调节。通过第一阈值A1的设置可以避免风机在不必要时频繁进行调速，造成运行不稳定的问题。
进一步的一个实施例中，驱动四线风机按照设定的目标转速Rt运行的步骤包括：
步骤S508，判断绝对值A是否大于第二阈值A2，若是进入步骤S510，否则进入步骤S512，其中第二阈值A2大于第一阈值A1。
步骤S510，以第一步长作为目标转速Rt的变化量调节电机的当前的实际转速Rn。
步骤S512，以第二步长作为目标转速Rt的变化量调节电机的当前的实际转速Rn，第一步长大于第二步长。
这里通过设置第二阈值A2能够实现风机的多级调速，即根据风机的当前的实际转速Rn和目标转速Rt的差值的绝对值A的大小来控制调节的步长，使得风机的调速过程更合理高效。
一个具体的实施例中，当风机的当前的实际转速Rn和目标转速Rt的差 值大于50RPM时，控制以每X秒减小第一步长，例如X取2S，第一步长为2RPM，当风机的当前的实际转速Rn和目标转速Rt的差值小于-50RPM时，控制以每Y秒增加第一步长，例如Y取2S，第一步长为2RPM。当然在具体设置时，时间是可以自由设置的，但是目标转速Rt可能是由单片机内的参数来控制的，例如模值N来控制PWM信号的频率，占空比因子M来线性调节PWM信号的占空比，上述的第一步长可以通过占空比因子M的设定而确定，根据其对应规则，第一步长就会有一定取值特点。
同样地，绝对值A小于或等于第二阈值A2时的调速原理与绝对值A大于第二阈值A2相同，但是步长的大小不同，由于绝对值A较小，可以以更小的步长即第二步长对四线风机进行调节，例如设定1RPM。
本发明还提供了一种冰箱，包括控制器，该控制器包括存储器和处理器，存储器内存储有控制程序，控制程序被处理器执行时用于实现上述任一实施例或实施例的组合的四线风机控制方法。处理器可以是一个中央处理单元(central processing unit，简称CPU)，或者为数字处理单元等等。处理器通过通信接口收发数据。存储器用于存储处理器执行的程序。存储器是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何介质，也可以是多个存储器的组合。上述计算程序可以从计算机可读存储介质下载到相应计算/处理设备或者经由网络(例如因特网、局域网、广域网和/或无线网络)下载到计算机或外部存储设备。
本实施例的冰箱在四线风机启动后先进行了故障的测试和排除，能够及时地对风机进行故障处理，进一步完善了四线风机的运行控制过程，有利于保证风机的正常运行。
至此，本领域技术人员应认识到，虽然本文已详尽示出和描述了本发明的多个示例性实施例，但是，在不脱离本发明精神和范围的情况下，仍可根据本发明公开的内容直接确定或推导出符合本发明原理的许多其他变型或修改。因此，本发明的范围应被理解和认定为覆盖了所有这些其他变型或修改。

Claims (10)

  1. 一种用于冰箱制冷的四线风机控制方法，包括：
    驱动所述四线风机以预设启动流程启动；
    获取所述四线风机的反馈信号，并根据所述反馈信号确定所述四线风机的实际转速；
    根据所述四线风机的实际转速判断所述四线风机是否出现故障；
    若是，则驱动所述四线风机进入故障运转模式；
    若否，则驱动所述四线风机进入正常调速模式。
  2. 根据权利要求1所述的四线风机控制方法，其中，驱动所述四线风机进入故障运转模式的过程包括：
    以设定的启停周期控制所述四线风机启停，其中所述启停周期包括设定停机时长以及启动时长；
    在所述启停周期内的启动时长中，重新根据所述四线风机的实际转速判断所述故障是否消除；
    若是，则退出所述故障运转模式，并驱动所述四线风机进入所述正常调速模式；
    若否，则重复按照所述启停周期控制所述四线风机启停，并且若所述启停周期的连续重复次数超过预设次数阈值的情况，控制所述四线风机停机，并对故障停机进行计时，并在计时时间达到停机阈值时驱动所述四线风机再次进入故障运转模式。
  3. 根据权利要求2所述的四线风机控制方法，其中，以设定的启停周期控制所述四线风机启停的过程包括：
    发送具有所述启停周期的第一PWM脉冲信号至所述四线风机，以控制所述四线风机启停，其中所述第一PWM脉冲信号在所述启停周期内的停机时长内的占空比为0、在所述启停周期内的启动时长内的占空比为50％。
  4. 根据权利要求3所述的四线风机控制方法，其中，以设定的启停周期控制所述四线风机启停的过程还包括：
    在每一所述启停周期内第三预设时长内控制所述四线风机上电，所述第 三预设时长包括所述启动时长开始前的第四预设时长、所述启动时长以及所述启动时长结束后的第五预设时长。
  5. 根据权利要求1所述的四线风机控制方法，其中，驱动所述四线风机以预设启动流程启动的过程包括：
    发送启动上电信号至所述四线风机，以控制所述四线风机上电；
    同时发送启动控制信号至所述四线风机，用于控制所述四线风机在上电第一预设时长后的第二预设时长内以预设测试转速运行。
  6. 根据权利要求5所述的四线风机控制方法，其中，
    所述启动控制信号为所述第一预设时长内占空比为0、所述第二预设时长内占空比为50％的第二PWM脉冲信号。
  7. 根据权利要求5所述的四线风机控制方法，其中，根据所述四线风机的实际转速判断所述四线风机是否出现故障的过程包括：
    当所述第二预设时长内的所述四线风机的实际转速小于正常转速阈值时判定所述四线风机出现故障。
  8. 根据权利要求1或2所述的四线风机控制方法，其中，驱动所述四线风机进入正常调速模式的过程包括：
    获取所述四线风机的当前的实际转速和目标转速；
    计算所述四线风机的当前的实际转速和所述目标转速的差值的绝对值，
    当所述绝对值大于第一阈值时，驱动所述四线风机按照设定的目标转速运行。
  9. 根据权利要求8所述的四线风机控制方法，其中，驱动所述四线风机按照设定的目标转速运行的过程包括：
    判断所述绝对值是否大于第二阈值，所述第二阈值大于所述第一阈值；
    当所述绝对值大于所述第二阈值时，以第一步长作为所述目标转速的变化量调节所述电机的当前的实际转速；
    当所述绝对值小于或等于所述第二阈值时，以第二步长作为所述目标转速的变化量调节所述电机的当前的实际转速，所述第一步长大于所述第二步 长。
  10. 一种冰箱，包括：
    控制器，所述控制器包括存储器和处理器，其中所述存储器存储有机器可执行程序，所述机器可执行程序被处理器执行时实现根据权利要求1至9中任意一项的四线风机控制方法。
PCT/CN2022/075520 2021-06-30 2022-02-08 一种用于冰箱制冷的四线风机控制方法及冰箱 WO2023273351A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110738379.6A CN115539421A (zh) 2021-06-30 2021-06-30 一种用于冰箱制冷的四线风机控制方法及冰箱
CN202110738379.6 2021-06-30

Publications (1)

Publication Number Publication Date
WO2023273351A1 true WO2023273351A1 (zh) 2023-01-05

Family

ID=84690198

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/075520 WO2023273351A1 (zh) 2021-06-30 2022-02-08 一种用于冰箱制冷的四线风机控制方法及冰箱

Country Status (2)

Country Link
CN (1) CN115539421A (zh)
WO (1) WO2023273351A1 (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03210098A (ja) * 1990-01-11 1991-09-13 Fujitsu Ltd ファンアラーム検出装置
CN106050715A (zh) * 2016-05-27 2016-10-26 珠海格力电器股份有限公司 一种用于空调的风机转速控制方法、装置及空调
CN106438432A (zh) * 2016-10-19 2017-02-22 上海善继能科技有限公司 一种风扇报警系统
CN210397210U (zh) * 2019-08-13 2020-04-24 新乡市太行佳信电气技术有限公司 一种改进型的四线风机的故障检测电路
CN212508937U (zh) * 2020-05-21 2021-02-09 四川虹美智能科技有限公司 风机转速控制装置和系统
CN112416711A (zh) * 2020-11-20 2021-02-26 恒为科技（上海）股份有限公司 一种四线风扇在位检测方法、装置和四线风扇控制系统

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03210098A (ja) * 1990-01-11 1991-09-13 Fujitsu Ltd ファンアラーム検出装置
CN106050715A (zh) * 2016-05-27 2016-10-26 珠海格力电器股份有限公司 一种用于空调的风机转速控制方法、装置及空调
CN106438432A (zh) * 2016-10-19 2017-02-22 上海善继能科技有限公司 一种风扇报警系统
CN210397210U (zh) * 2019-08-13 2020-04-24 新乡市太行佳信电气技术有限公司 一种改进型的四线风机的故障检测电路
CN212508937U (zh) * 2020-05-21 2021-02-09 四川虹美智能科技有限公司 风机转速控制装置和系统
CN112416711A (zh) * 2020-11-20 2021-02-26 恒为科技（上海）股份有限公司 一种四线风扇在位检测方法、装置和四线风扇控制系统

Also Published As

Publication number Publication date
CN115539421A (zh) 2022-12-30

Similar Documents

Publication Publication Date Title
TWI285308B (en) Method, controlling apparatus and system for controlling standby power of low power devices
US9634593B2 (en) System and method for permanent magnet motor control
CN108278736B (zh) 空调及其空调部分负荷控制方法和装置
US9746858B2 (en) Control device for automatically starting warm-up
RU2015145181A (ru) Цепь управления внешним вентилятором кондиционера, способ управления и кондиционер
US20110320061A1 (en) Temperature control system and method for computing device
US9213394B1 (en) System and method for determining power consumption
TWI435537B (zh) 調變風扇轉速之風扇控制系統與風扇控制方法
CN108317702B (zh) 空调及其空调负荷控制方法和装置
CN110410983B (zh) 一种加湿装置的加湿速率控制方法、装置及加湿器
US9900424B2 (en) Chip aware thermal policy
US7764522B2 (en) Circuit and method for controlling the start-up cycle of a power supply
CN107329509B (zh) 电暖器及其温度控制方法和温度控制装置
CN114466577B (zh) 一种多功能的数据机房采控方法及设备
WO2023273351A1 (zh) 一种用于冰箱制冷的四线风机控制方法及冰箱
JP6661509B2 (ja) ブラシレスモータの制御装置及び制御方法
CN113568805A (zh) 一种服务器功耗的实时调整方法、装置、电子设备
JP5357252B2 (ja) 電源回路及び電力供給方法
CN115189439A (zh) 功率分配单元的预充时间调整方法、终端及存储介质
CN114623565A (zh) 多联机空调系统及其控制方法和控制装置
JP2002247878A (ja) 電動機の制御方法
JP2004257652A (ja) 空気調和機の制御装置
TWI845339B (zh) 依據溫度差來設定控制器參數以控制系統總功耗的方法
TW496944B (en) Method of obtaining an air conditioner with high-efficiency capability by changing the operating frequency and the input voltage of its compressor
CN116576558A (zh) 变频水泵控制方法、装置、空调器和计算机可读存储介质

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22831184

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22831184

Country of ref document: EP

Kind code of ref document: A1