WO2018086504A1 - 冰箱搁物架的升降同步系统及其控制方法 - Google Patents

冰箱搁物架的升降同步系统及其控制方法 Download PDF

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Publication number
WO2018086504A1
WO2018086504A1 PCT/CN2017/109668 CN2017109668W WO2018086504A1 WO 2018086504 A1 WO2018086504 A1 WO 2018086504A1 CN 2017109668 W CN2017109668 W CN 2017109668W WO 2018086504 A1 WO2018086504 A1 WO 2018086504A1
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Prior art keywords
motor
controller
lifting
refrigerator
rack
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PCT/CN2017/109668
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English (en)
French (fr)
Inventor
唐海东
刘明勇
吴光瑞
张珩
王宁
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Qingdao Haier Co Ltd
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Qingdao Haier Co Ltd
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    • 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
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
    • 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
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/04—Arrangements for controlling or regulating the speed or torque of more than one motor

Definitions

  • the invention belongs to the technical field of household appliances, and in particular relates to a lifting synchronization system of a refrigerator shelf and a control method thereof.
  • At present, at least one rack for holding articles is usually provided in a refrigerating compartment of a refrigerator, and a rib for supporting the rack is disposed on a wall of the refrigerator compartment of the refrigerator, and the rack is placed on the rib Upper, thereby dividing the refrigeration compartment into a plurality of storage spaces.
  • an electric lifting rack can be arranged in the refrigerator.
  • the lifting and lowering of the rack is completed by the lifting mechanism.
  • the main function is to meet the storage of different volumes of food, and the electric rack can be electrically adjusted within the effective range.
  • the height between the two does not require disassembly of the rack to enhance the user experience.
  • the following problems may occur: when the rack is subjected to a large unbalanced external force or a single motor fails, the other motor continues to operate, causing the rack to be seriously tilted.
  • the problem of the jamming of the motor jam is that the lifting function of the rack is invalid.
  • One of the objects of the present invention is to provide a lifting synchronization system for a refrigerator rack that effectively solves the above problems.
  • Another object of the present invention is to provide a method for synchronous control of lifting and lowering of a refrigerator shelf.
  • the present invention provides a lifting synchronization system for a refrigerator rack.
  • the utility model comprises: a controller, a rack body and at least two lifting mechanisms, the lifting mechanism comprising:
  • a motor wherein the motor is provided with a sensor, and the motor and the sensor are electrically connected to the controller;
  • connecting member fixed to the rack body, wherein the connecting member is provided with a sliding nut adapted to the driving screw, and when the rack body and the lifting mechanism are assembled, the connecting member Slidingly sleeved on the guiding rod, the sliding nut is sleeved on the driving screw, and the motor drives the driving screw to rotate to drive the sliding nut to lift and move to drive the shelf body along the guiding Rod movement
  • the controller is configured to control the rotational speed and the number of steps of each motor to gradually synchronize according to the rotational speed and the number of steps of the corresponding motor fed back by each of the sensors.
  • a rotor is provided in the motor, and the rotor is coupled to the drive screw.
  • the rotor is provided with a magnetic gear that operates in synchronization with the rotor, and the sensor converts the sensed gear rotational speed into an electrical signal for feedback to the controller.
  • the senor is a Hall sensor.
  • the opposite sides of the rack body are provided with a support member, and the rack body is fixedly connected to the connecting member through the support member.
  • the two lifting mechanisms are disposed on both sides of the rear wall of the refrigerator liner.
  • the present invention provides a method for controlling the lifting and lowering of a refrigerator shelf, which comprises the following steps:
  • the sensor collects the speed and the step number signals of each motor and feeds back to the controller
  • the controller When the controller analyzes the difference between the speed and the step number of different motors, the controller sends a control signal to each motor to adjust the speed and the number of steps of each motor until the motors run synchronously.
  • the controller is integrated with a storage unit, and the controller stores the number of motor running steps sensed by the sensor to the storage when the rack is lifted to any position and the power is turned off. unit.
  • the storage unit is an EPROM or an EEPROM.
  • the senor is a Hall sensor.
  • the utility model has the beneficial effects that the sensor detects the running state of the motor from time to time and feeds back to the controller for logic analysis, adjusts the driving compensation from time to time, and then adjusts the signal for driving the motor to operate, so that the two motors can always keep running synchronously.
  • the system components are simple in structure, high in precision and fast in response.
  • FIG. 1 is a schematic structural view of a lifting synchronization system of a refrigerator shelf according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a lifting synchronization system of a refrigerator shelf at another angle in an embodiment of the present invention
  • FIG 3 is a schematic view showing the interaction principle of a rotor, a magnetic gear, and a sensor according to an embodiment of the present invention.
  • the lifting synchronization system 10 of the refrigerator rack comprises a controller (not shown), a rack body 11 and a lifting mechanism 12, wherein the lifting mechanism 12 further comprises: a motor, a driving screw connected to the motor and driven by the motor, The guide rod, the rack body 11 is slidably disposed on the guide rod by a connecting member, and a rotor and a sensor for sensing the motion state of the rotor are provided in the motor.
  • the rack body 11 belongs to an ultra-wide rack, and at least two lifting mechanisms 12 are required to provide sufficient power to complete the lifting movement of the rack body 11 to provide a more flexible space for storing food materials.
  • the lifting mechanisms 12 are respectively disposed on both sides of the rear wall of the refrigerator inner casing (not shown).
  • one of the lifting mechanisms 12 includes: a first motor, a first driving screw, a first guiding rod and a first connecting member adapted to the first guiding rod, the first guiding rod is disposed adjacent to the first driving screw and two Parallel, one end of the first guiding rod and the first driving screw are fixed on the top wall of the inner chamber of the refrigerator compartment, and the other end of the first transmission screw is fixedly connected with the rotor of the first motor, the first transmission screw and the first The rotor of a motor rotates synchronously, and the other end of the first guide rod is fixed to the outer casing of the first motor.
  • the other lifting mechanism 12 includes a second motor, a second driving screw, a second guiding rod and a second connecting member adapted to the second guiding rod.
  • the second guiding rod and the second driving screw are disposed adjacent to each other and are parallel to each other.
  • One end of the second guiding rod and the second driving screw are fixed on the top wall of the indoor chamber of the refrigerator, and the other end of the second driving screw is fixedly connected with the rotor of the second motor, and the rotor of the second driving screw and the second motor Simultaneously rotating, the other end of the second guide rod is fixed to the outer casing of the second motor.
  • the opposite sides of the rack body 11 are provided with a support member 111, and the rack body 11 is fixedly connected to the connecting member through the support member 111.
  • first connecting member is slidably sleeved on the first guiding rod
  • first sliding nut is sleeved on the first driving screw
  • second connecting member is slidably sleeved on the second guiding rod
  • the two sliding nuts are sleeved on the second transmission screw.
  • the drive screw is driven by the motor such that the slide nut moves along the drive screw to move along the guide rod body 11 along the guide rod.
  • the two lifting mechanisms 12 are symmetrically assembled with the rack body 11, the structures of the two lifting mechanisms 12 are identical.
  • the first motor 121 is activated, and the rotor 1211 therein drives the first transmission screw 122 to rotate, so that the sliding nut 125 moves up and down along the transmission screw, and the first connecting member 124 moves along the guiding rod to drive and rest.
  • the frame body 11 moves along the guide bar 123.
  • a first sensor 1212 is disposed in the first motor 121, and the first motor 121 and the first sensor 1212 are electrically connected to a controller (not shown).
  • the first sensor 1212 is a Hall sensor.
  • the rotor 1211 of the first motor 121 is provided with a magnetic gear 13 which is synchronously operated with the rotor.
  • the first sensor 1212 can detect different states of the magnetic tooth boss and the non-magnetic groove on the gear by the principle of electromagnetic induction. Thereby, the rotational speed of the magnetic gear 13 is obtained, and the sensed gear rotational speed is converted into an electrical signal fed back to the controller.
  • the controller receives the rotation speed and the step number signals of the corresponding motor fed back by the first sensor and the second sensor, and the controller analyzes the first motor and When the speed signal of the second motor has a difference value, the logic operation is performed, and the signal of the motor running is compensated, so that the motor with slow speed is relatively accelerated, the motor with fast speed is relatively decelerated, and the controller continuously detects the speed and The drive signal is compensated, and the speed and the number of steps of each motor are controlled to gradually synchronize.
  • the present invention also provides a control method for a lifting synchronization system using the above-described refrigerator rack, which comprises the following steps:
  • the sensor collects the speed and the step number signal of each motor and feeds back to the controller, and the controller receives the speed and the step number signal of the corresponding motor fed back by the first sensor and the second sensor.
  • the controller analyzes the difference between the speed of the different motors and the number of steps, the controller sends a control signal to each motor to adjust the speed and the number of steps of each motor until the motors run synchronously.
  • the controller analyzes that the speed signals of the first motor and the second motor have different values, perform a logic operation and compensate by driving the signal of the motor running, so that the motor with slow speed is relatively accelerated, and the motor with fast speed is relatively decelerated.
  • the controller continuously detects the speed and drive signal compensation, and controls the speed and the number of steps of each motor to gradually synchronize.
  • the first motor When the weight load is placed on the rack near the side of the first motor, the first motor is subjected to greater resistance than the second motor, and the first motor operates at a slower speed than the second motor, the first sensor and the second
  • the real-time sensor collects the speed signals of the first motor and the second motor and transmits them to the controller.
  • the controller analyzes that the speed signals of the first motor and the second motor have different values, performs logic operations, and compensates by driving signals of the motor.
  • the first motor is relatively accelerated, the second motor is relatively decelerated, and the rotational speed and the drive signal compensation are continuously detected, so that the two motors can be operated synchronously.
  • the guiding rod is further provided with a top limiting device 126 and a bottom limiting device electrically connected to the controller. 127, when the connecting member touches the top limiting device 126 or the bottom limiting device 127, the top limiting device 126 or the bottom limiting device 127 feeds back the position signal of the connecting member to the controller, and the controller is set according to the top limit. The position signal fed back by the device 126 or the bottom limit device 127 controls the motor to stop operating.
  • the top limiting device 126 and the bottom limiting device 127 are both contact switches.
  • the first connecting member 124 or the second connecting member will sequentially reach the highest point of the rising stroke or the lowest of the descending stroke.
  • the first arriving connector will touch the top limiting device 126 or the bottom limiting device 127, and the top limiting device 126 or the bottom limiting device 127 will feed back the position signal of the connector to the controller (high/low The level signal), the controller controls the corresponding motor to stop according to the position signal fed back by the top limiting device 126 or the bottom limiting device 127, and the motor corresponding to the connected connector continues to run until the connected connector touches
  • the motor block is prevented from forwarding heat and generating noise, and the problem of motor running deviation is effectively reset.
  • a memory unit is integrated on the controller, and when the rack is lifted to any position and the power is turned off, the controller stores the number of motor running steps sensed by the sensor to the storage unit.
  • the number of motor running steps detected by the sensor is transmitted to the storage unit on the controller to memorize the position information of the motor at the time of power-off, which effectively solves the problem that when the rack is lifted to the highest minimum travel limit point after power-on again, The problem that the motor may be blocked by the limit.
  • the storage unit is an EPROM or an EEPROM.
  • the lifting synchronization system of the refrigerator rack of the present invention and the control method thereof preferably solve the following three problems:
  • the senor detects the motor speed stop signal, immediately feeds back to the controller, and controls another motor to stop running, effectively solving the problem that the non-faulty motor continues to run and block the heat transfer;
  • the senor collects the speed and running steps of the two motors from time to time and feeds back to the controller.
  • the controller coordinates the two motors at the same time. Operation, effectively solving the problem of tilting the rack;

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

提供一种冰箱搁物架的升降同步系统（10）及其控制方法。系统包括：控制器、搁物架本体（11）和至少二个升降机构（12）。升降机构（12）包括：电机（121），传动螺杆（122），导向杆（123），其上设有顶部限位装置（126）和底部限位装置（127）；连接件（124），其上设有滑动螺母（125），滑动螺母（125）升降带动连接件（124）及搁物架本体（11）沿导向杆（123）移动；当连接件（124）触碰顶部限位装置（126）或底部限位装置（127）时，顶部限位装置（126）或底部限位装置（127）向控制器反馈连接件（124）的位置信号，控制器被设置为根据顶部限位装置（126）或底部限位装置（127）反馈的位置信号控制电机停止运行。方法包括：传感器采集各个电机（121）的转速和步数信号并反馈给控制器；当控制器分析出不同电机（121）的转速和步数信号存在差异时，控制器向每个电机（121）发出控制信号，调节各个电机（121）的转速和步数直至各个电机（121）运行同步。

Description

冰箱搁物架的升降同步系统及其控制方法
本申请要求了申请日为2016年11月10日，申请号为201611037914.0，发明名称为“冰箱搁物架的升降同步系统及其控制方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明属于家用电器技术领域，尤其涉及一种冰箱搁物架的升降同步系统及其控制方法。
背景技术
目前，在冰箱的制冷间室内通常设有至少一个用于搁置物品的搁物架，在冰箱制冷间室的内胆壁上设置有用于支撑搁物架的胆筋，搁物架放置在胆筋上，从而将制冷间室分隔成若干置物空间。
随着技术的发展，冰箱内可设置电动升降搁物架，搁物架的升降是通过升降机构完成的，其主要作用是为了满足存放不同体积的食材，可以在有效范围内电动调节搁物架之间的高度，无需拆卸搁物架，提升用户体验感。但是这种电动升降搁物架在使用的过程中会出现以下问题：搁物架在受到较大的不平衡外力或单个电机产生故障时，另一个电机还会继续运行，导致搁物架严重倾斜和电机堵转卡死的问题，搁物架升降功能失效。
发明内容
本发明的目的之一在于提供一种有效解决上述问题的冰箱搁物架的升降同步系统。
本发明的目的还在于提供一种冰箱搁物架的升降同步控制方法。
为实现上述发明目的之一，本发明提供一种冰箱搁物架的升降同步系统，
其包括：控制器、搁物架本体和至少二个升降机构，所述升降机构包括：
电机，所述电机内设有传感器，所述电机及传感器均与所述控制器电性连接；
传动螺杆，与所述电机连接且被所述电机驱动运转；
导向杆，与所述传动螺杆平行设置；
连接件，与所述搁物架本体固定，所述连接件上设有与所述传动螺杆适配的滑动螺母，当所述搁物架本体与所述升降机构装配完成后，所述连接件滑动地套设于所述导向杆上，所述滑动螺母套设于传动螺杆上，所述电机驱动所述传动螺杆旋转以驱动所述滑动螺母升降从而带动所述搁物架本体沿所述导向杆移动；
所述控制器被设置为根据每个所述传感器反馈的对应电机的转速和步数信号控制每个电机的转速和步数逐渐趋于同步。
作为本发明的进一步改进，所述电机内设有转子，所述转子与所述传动螺杆连接。
作为本发明的进一步改进，所述转子上设有磁性齿轮，所述磁性齿轮与所述转子同步运转，所述传感器将感测到的齿轮转速转换为电信号反馈给所述控制器。
作为本发明的进一步改进，所述传感器为霍尔传感器。
作为本发明的进一步改进，所述搁物架本体的相对两侧设有支撑件，所述搁物架本体通过所述支撑件与所述连接件固定连接。
作为本发明的进一步改进，两个所述升降机构设置在冰箱内胆后壁的两侧。
为实现上述另一发明目的，本发明提供一种冰箱搁物架的升降同步控制方法，其包括以下步骤：
传感器采集各个电机的转速和步数信号并反馈给控制器；
当控制器分析出不同电机的转速和步数信号存在差异时，控制器向每个电机发出控制信号，调节各个电机的转速和步数直至各个电机运行同步。
作为本发明的进一步改进，所述控制器上集成有存储单元，当搁物架升降到任何一个位置发生断电时，所述控制器将所述传感器感测到的电机运行步数存储至存储单元。
作为本发明的进一步改进，所述存储单元为EPROM或EEPROM。
作为本发明的进一步改进，所述传感器为霍尔传感器。
本发明的有益效果是：通过传感器时时侦测电机的运行状态并反馈给控制器进行逻辑分析，时时调节驱动补偿，再调节驱动电机运行的信号的方法，达到两个电机始终可以保持同步运行的目的，系统部件结构简单，精密度高，响应快。
附图说明
图1是本发明一具体实施方式中冰箱搁物架的升降同步系统结构示意图；
图2是本发明一具体实施方式中又一角度下冰箱搁物架的升降同步系统结构示意图；
图3是本发明一具体实施方式中转子、磁性齿轮及传感器相互作用原理示意图。
具体实施方式
以下将结合附图所示的各实施方式对本发明进行详细描述。但这些实施方式并不限制本发明，本领域的普通技术人员根据这些实施方式所做出的结构、方法、或功能上的变换均包含在本发明的保护范围内。
本文使用的例如“上”、“上方”、“下”、“下方”等表示空间相对位置的术语是出于便于 说明的目的来描述如附图中所示的一个单元或特征相对于另一个单元或特征的关系。空间相对位置的术语可以旨在包括设备在使用或工作中除了图中所示方位以外的不同方位。例如，如果将图中的设备翻转，则被描述为位于其他单元或特征“下方”或“之下”的单元将位于其他单元或特征“上方”。因此，示例性术语“下方”可以囊括上方和下方这两种方位。设备可以以其他方式被定向(旋转90度或其他朝向)，并相应地解释本文使用的与空间相关的描述语。
参图1所示，为本发明冰箱搁物架的升降同步系统10的一较佳实施方式。该冰箱搁物架的升降同步系统10包括控制器(图未示)、搁物架本体11和升降机构12，其中，升降机构12又包括：电机、与电机相连且被电机驱动的传动螺杆、导向杆，搁物架本体11通过连接件滑动地设置在导向杆，在电机中设有转子和用于感测转子运动状态的传感器。
在本实施方式中，搁物架本体11属于超宽搁物架，至少需要两个升降机构12提供充足的动力才能完成搁物架本体11的升降运动，提供更灵活的储存食材的空间，两个升降机构12分别设置在冰箱内胆(图未示)后壁的两侧。
具体地，其中一个升降机构12包括：第一电机、第一传动螺杆、第一导向杆及与第一导向杆适配的第一连接件，第一导向杆与第一传动螺杆靠近设置且两者平行，第一导向杆与第一传动螺杆的一端均固定在冰箱制冷间室内胆的顶壁上，第一传动螺杆的另一端与第一电机的转子固定连接，第一传动螺杆与第一电机的转子同步转动，第一导向杆的的另一端固定在第一电机的外壳上。另一个升降机构12包括第二电机、第二传动螺杆、第二导向杆及与第二导向杆适配的第二连接件，第二导向杆与第二传动螺杆靠近设置且两者平行，第二导向杆与第二传动螺杆的一端均固定在冰箱制冷间室内胆的顶壁上，第二传动螺杆的另一端与第二电机的转子固定连接，第二传动螺杆与第二电机的转子同步转动，第二导向杆的的另一端固定在第二电机的外壳上。
进一步地，搁物架本体11的相对两侧设有支撑件111，搁物架本体11通过支撑件111与连接件固定连接。
在第一连接件上设有与第一传动螺杆适配的第一滑动螺母，在第二连接件上设有与第二传动螺杆适配的第二滑动螺母，当搁物架本体11与升降机构12装配完成后，第一连接件滑动地套设于第一导向杆上，第一滑动螺母套设于第一传动螺杆上，第二连接件滑动地套设于第二导向杆上，第二滑动螺母套设于第二传动螺杆上。传动螺杆受电机驱动使得滑动螺母沿传动螺杆升降从带动搁物架本体11沿导向杆移动。
由于两个升降机构12与搁物架本体11对称装配，两个升降机构12的结构完全相同， 以下以其中一个升降机构12为例进行说明：
结合图2和3所示，启动第一电机121，其内的转子1211驱动第一传动螺杆122转动，使得滑动螺母125沿传动螺杆升降，第一连接件124沿导向杆移动，带动与搁物架本体11沿导向杆123移动。
进一步地，第一电机121内设有第一传感器1212，第一电机121及第一传感器1212均与控制器(图未示)电性连接。优选地，第一传感器1212为霍尔传感器。第一电机121的转子1211上设有磁性齿轮13，磁性齿轮13与转子同步运转，第一传感器1212通过电磁感应原理，可以探测到齿轮上的磁性齿凸台和非磁性凹槽的不同状态，从而得到磁性齿轮13的旋转速度，并将感测到的齿轮转速转换为电信号反馈给控制器。
由于搁物架的升降需要至少二个升降机构12，在本实施方式中，控制器接收第一传感器和第二传感器反馈的对应电机的转速和步数信号，当控制器分析出第一电机和第二电机的转速信号有差异值时，进行逻辑运算，并通过驱动电机运行的信号进行补偿，使转速慢的电机相对加速运行，转速快的电机相对减速运行，控制器不断的侦测转速和驱动信号补偿，控制每个电机的转速和步数逐渐趋于同步。
相应地，本发明还提出一种使用上述冰箱搁物架的升降同步系统的控制方法，其包括以下步骤：
S1、传感器采集各个电机的转速和步数信号并反馈给控制器，控制器接收第一传感器和第二传感器反馈的对应电机的转速和步数信号。
S2、当控制器分析出不同电机的转速和步数信号存在差异时，控制器向每个电机发出控制信号，调节各个电机的转速和步数直至各个电机运行同步。当控制器分析出第一电机和第二电机的转速信号有差异值时，进行逻辑运算，并通过驱动电机运行的信号进行补偿，使转速慢的电机相对加速运行，转速快的电机相对减速运行，控制器不断的侦测转速和驱动信号补偿，控制每个电机的转速和步数逐渐趋于同步。
当重物负载放置在靠近第一电机一侧的搁物架上时，第一电机受到的阻力要大于第二电机，第一电机的运行速度要慢于第二电机，第一传感器和第二传感器实时采集到第一电机和第二电机的转速信号传递给控制器，控制器分析到第一电机和第二电机的转速信号有差异值，进行逻辑运算，并通过驱动电机运行的信号进行补偿，使第一电机相对加速运行，第二电机相对减速运行，不断的侦测转速和驱动信号补偿，从而达到两个电机可以同步运行的目的。
当重物负载放置在靠近第二电机一侧的搁物架上，同上的逆向控制逻辑。
更进一步地，导向杆上还设有与控制器电性连接的顶部限位装置126和底部限位装置 127，当连接件触碰顶部限位装置126或底部限位装置127时，顶部限位装置126或底部限位装置127向控制器反馈连接件的位置信号，控制器被设置为根据顶部限位装置126或底部限位装置127反馈的位置信号控制电机停止运行。
优选地，顶部限位装置126和底部限位装置127均为触点开关。
第一电机121和第二电机(未标号)在运转中若出现不同步的偏差时，第一连接件124或第二连接件(未标号)会先后到达上升行程的最高点或下降行程的最低点，此时，先到达的连接件会触碰到顶部限位装置126或底部限位装置127，顶部限位装置126或底部限位装置127向控制器反馈连接件的位置信号(高/低电平信号)，控制器根据顶部限位装置126或底部限位装置127反馈的位置信号控制相应的电机停止运行，后到达的连接件所对应的电机继续运转直至后到达的连接件触碰到顶部限位装置126或底部限位装置127后停止运行，防止电机堵转发热和产生噪音，有效的复位了电机运行偏差的问题。
另外，控制器上集成有存储单元，当搁物架升降到任何一个位置发生断电时，控制器将传感器感测到的电机运行步数存储至存储单元。传感器侦测到的电机运行步数，传递给控制器上的存储单元，记忆断电时刻电机的位置信息，有效的解决了再次上电后，搁物架升降到最高最低行程限位点时，电机可能发生的限位堵转卡死的问题。
优选地，存储单元为EPROM或EEPROM。
本发明的冰箱搁物架的升降同步系统及其控制方法优选解决了以下三个问题：
1、当一个电机故障不转时，传感器侦测到电机转速停止信号，立即反馈给控制器，控制另一个电机也停止运转，有效解决非故障电机继续运行堵转发热的问题；
2、当搁物架上的重物放置不平衡，左右电机受力不均时，传感器时时采集两个电机的转速和运行步数，并反馈给控制器，控制器时时协调两个电机要同步运行，有效解决搁物架倾斜的问题；
3、当搁物架升降到任何一个位置发生断电时，霍尔传感器侦测到的电机运行步数，传递给控制器上的存储单元，记忆断电时刻电机的位置信息，有效的解决了再次上电后，搁物架升降到最高最低行程限位点时，电机可能发生的限位堵转卡死的问题。
对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。
此外，应当理解，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚起见，本领域技术人员应当将说明书作为一个整体，各实施例中的技术方案也可以经适当组合，形成本领域技术人员可以理解的其他实施方式。

Claims (10)

  1. 一种冰箱搁物架的升降同步系统，包括：控制器、搁物架本体和至少二个升降机构，其特征在于，所述升降机构包括：
    电机，所述电机内设有传感器，所述电机及传感器均与所述控制器电性连接；
    传动螺杆，与所述电机连接且被所述电机驱动运转；
    导向杆，与所述传动螺杆平行设置；
    连接件，与所述搁物架本体固定，所述连接件上设有与所述传动螺杆适配的滑动螺母，当所述搁物架本体与所述升降机构装配完成后，所述连接件滑动地套设于所述导向杆上，所述滑动螺母套设于传动螺杆上，所述电机驱动所述传动螺杆旋转以驱动所述滑动螺母升降从而带动所述搁物架本体沿所述导向杆移动；
    所述控制器被设置为根据每个所述传感器反馈的对应电机的转速和步数信号控制每个电机的转速和步数逐渐趋于同步。
  2. 根据权利要求1所述的冰箱搁物架的升降同步系统，其特征在于，所述电机内设有转子，所述转子与所述传动螺杆连接。
  3. 根据权利要求2所述的冰箱搁物架的升降同步系统，其特征在于，所述转子上设有磁性齿轮，所述磁性齿轮与所述转子同步运转，所述传感器将感测到的齿轮转速转换为电信号反馈给所述控制器。
  4. 根据权利要求1所述的冰箱搁物架的升降同步系统，其特征在于，所述传感器为霍尔传感器。
  5. 根据权利要求1所述的冰箱搁物架的升降同步系统，其特征在于，所述搁物架本体的相对两侧设有支撑件，所述搁物架本体通过所述支撑件与所述连接件固定连接。
  6. 根据权利要求1所述的冰箱搁物架的升降同步系统，其特征在于，两个所述升降机构设置在冰箱内胆后壁的两侧。
  7. 一种使用权利要求1所述冰箱搁物架的升降同步系统的控制方法，其特征在于，其包括以下步骤：
    传感器采集各个电机的转速和步数信号并反馈给控制器；
    当控制器分析出不同电机的转速和步数信号存在差异时，控制器向每个电机发出控制信号，调节各个电机的转速和步数直至各个电机运行同步。
  8. 根据权利要求7所述的冰箱搁物架的升降同步控制方法，其特征在于，所述控制器上 集成有存储单元，当搁物架升降到任何一个位置发生断电时，所述控制器将所述传感器感测到的电机运行步数存储至存储单元。
  9. 根据权利要求8所述的冰箱搁物架的升降同步控制方法，其特征在于，所述存储单元为EPROM或EEPROM。
  10. 根据权利要求5所述的冰箱搁物架的升降同步控制方法，其特征在于，所述传感器为霍尔传感器。
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CN113904195A (zh) * 2021-11-02 2022-01-07 威飞海洋装备制造有限公司 一种应用于单立柱系泊生产系统液滑环的维修装置

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