CN102980347B - Electric air door driving device and refrigerator - Google Patents
Electric air door driving device and refrigerator Download PDFInfo
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- CN102980347B CN102980347B CN201210510564.0A CN201210510564A CN102980347B CN 102980347 B CN102980347 B CN 102980347B CN 201210510564 A CN201210510564 A CN 201210510564A CN 102980347 B CN102980347 B CN 102980347B
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Abstract
The invention provides an electric air door driving device which comprises a motor, a driver, a plurality of sampling modules and a controller, wherein the driver is connected with the motor to drive the motor; the plurality of sampling modules are connected between the motor and the driver; and the controller is respectively connected with the driver and the sampling modules, the controller generates a plurality of control signals, every one of the plurality of control signals is changed according to a preset period, and the controller controls determines weather or not the change of a plurality of voltages acquired by the plurality of sampling modules meets the preset period, and determines that the motor has the stoppage when at least one of the change of the plurality of voltages acquired by the plurality of sampling modules does not meet the preset period. The electric air door driving device provided by embodiments of the invention adopts a closed-loop control mode, and the working status of the motor can be timely monitored, so that the electric air door driving device which can detect whether or not the electric air door runs and whether or not the action is abnormal has the advantages of being high in reliability and stability. The invention further provides the a refrigerator.
Description
Technical field
The present invention relates to refrigeration plant manufacturing technology field, particularly a kind of MOD drive unit and refrigerator.
Background technology
The stepper motor driving circuits such as refrigerator MOD used in the market all cannot complete self-inspection as run into fault.The effect of refrigerator air door is: by the opening and closing of air door for certain compartment temperature controls.When this compartment temperature is too high, air door is opened, and cold wind introduces this room by another room, and the temperature of controlled room is reduced; When the temperature of controlled room reaches setting value and stablizes, air door is closed.
As shown in Figure 3, be the drive circuit of existing MOD, main control chip exports four tunnel control signals to driving chip, driving chip receive and inverted signal be can drive motors rotate voltage to motor.
There is following shortcoming in existing MOD drive circuit: at present the driving of air door circuit is opened loop control, and the whether action of None-identified air door, whether action is normal.If run into circuit or driving chip fault, this controlled room then cannot normally work.
Summary of the invention
The present invention one of is intended at least to solve the problems of the technologies described above or at least provides a kind of useful business to select.
For this reason, one object of the present invention be to propose a kind of can the working condition of monitor driver in real time, whether normally thus can detect MOD whether action and action MOD drive unit, reliability is high and stability is strong.
Another object of the present invention is to propose a kind of refrigerator.
To achieve these goals, the embodiment of first aspect present invention proposes a kind of MOD drive unit, comprising: motor; Driver, described driver is connected with described motor, for driving described motor; Multiple sampling module, described multiple sampling module is connected between described motor and described driver; Controller, described controller is connected with described sampling module with described driver respectively, described controller generates multiple control signal, wherein, each in described multiple control signal changes according to predetermined period, described controller judges whether the change of multiple voltages of described multiple sampling module collection meets described predetermined period, and when at least one does not meet described predetermined period in the change of multiple voltages judging described multiple sampling module collection, judges that described motor breaks down.
MOD drive unit according to the embodiment of the present invention adopts close-loop control mode, can the working condition of monitor driver and whether fault in real time, thus MOD whether action and the whether normal MOD drive unit of action can be detected, there is the advantage that reliability is high and stability is strong.
In addition, MOD drive unit according to the above embodiment of the present invention can also have following additional technical characteristic:
In an embodiment of the present invention, described multiple control signal is four control signals, described multiple sampling module is four sampling modules, and described driver generates four corresponding drive singal to drive described motor by four connecting lines according to described four control signals.
In an embodiment of the present invention, described four sampling modules comprise: first to fourth resistance, and described first to fourth resistance is connected on described four connecting lines.
In an embodiment of the present invention, described sampling module also comprises: first to fourth amplifier, the first input end of described first to fourth amplifier and the second input are connected to the two ends of described first to fourth resistance, and the output of described amplifier is connected with described controller.
The embodiment of second aspect present invention also proposed a kind of refrigerator, comprising: the MOD drive unit that first aspect present invention embodiment proposes.
According to refrigerator of the present invention, the MOD drive unit of this refrigerator adopts close-loop control mode, can the working condition of monitor driver and whether fault in real time, thus MOD whether action and the whether normal MOD drive unit of action can be detected, there is the advantage that reliability is high and stability is strong, thus make user or maintenance personal can judge the duty that MOD is current to improve the stability of refrigerator complete machine according to the feedback signal of circuit.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the structure chart of MOD drive unit according to an embodiment of the invention;
Fig. 2 is the circuit theory diagrams of MOD drive unit according to an embodiment of the invention; With
Fig. 3 is the driving circuit principle figure of existing a kind of MOD;
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
The MOD drive unit according to the embodiment of the present invention is described in detail below in conjunction with accompanying drawing 1-2.
As shown in Figure 1, according to the MOD drive unit 100 of the embodiment of the present invention, comprising: motor 110, driver 120, multiple acquisition module 130 and controller 140.
Motor 100 provides power for refrigerator air door work.Driver 120 is connected with motor 110, for drive motors 110.Multiple sampling module 130 is connected between motor 110 and driver 120.Controller 140 is connected with multiple sampling module 130 with driver 120 respectively, controller 140 generates multiple control signal, wherein, each in multiple control signal changes according to predetermined period, controller 140 judges whether the change of multiple voltages of multiple sampling module 130 meets predetermined period, and when judging that in his change of multiple voltages that multiple sampling module 130 gathers, at least one does not meet predetermined period, judge that motor breaks down.Wherein, predetermined period presets according to the working condition of motor 110.
Particularly, multiple control signal is four control signals, and multiple sampling module is four sampling modules, and driver generates four corresponding drive singal to pass through four connecting line drive motors 110 according to four control signals.Wherein, four sampling modules comprise: the first resistance, the second resistance, the 3rd resistance and the 4th resistance, and first to fourth resistance is connected on four connecting lines, further, four sampling modules also comprise: the first amplifier, the second amplifier, the 3rd amplifier and the 4th amplifier, and the first input end of first to fourth amplifier and the second input are connected at the two ends of first to fourth resistance, the output of amplifier is connected with controller 140.When after circuit ON, can by electric current on first to fourth resistance, two ends produce differential signal, and differential signal (voltage signal) feeds back to controller 140 after amplifying respectively through first to fourth amplifier.Wherein, first to fourth amplifier is but is not limited to operational amplifier.The resistance of first to fourth resistance can be calculated according to side circuit, and therefore not to repeat here.
In the examples described above, when needs drive motors 110 carries out work, first, controller 140 produces four control signals, and four control signals all change according to predetermined period, and driver 120 receives and generates four corresponding drive singal according to four control signals, what then four drive singal are converted into same period can the voltage of drive motors 110, by four connecting lines for motor 110 provides voltage, drive motors 110 operates, thus achieves motor driving.Due to driver 120 by four connecting lines (wire) for motor 110 is powered, pass through so four resistance on four connecting lines have electric current, thus four resistance two ends produce differential signal, and the cycle of differential signal change is identical with voltage cycle, differential signal carries out amplifying and feeds back to controller 140 by the operational amplifier at each resistance two ends, whether controller 140 is identical with predetermined period according to the cycle of each ohmically differential signal change of feedback, judges whether motor runs well.Specifically, if the cycle of four of feedback ohmically differential signal changes is all identical with predetermined period, then controller 140 judges that motor 110 works well; If have at least in the cycle of each ohmically differential signal change of feedback one different from predetermined period time, then controller 140 judges that motor breaks down, just reminding user or maintenance personal can keep in repair in time, thus substantially increase the stability of refrigerator.
Thus, multiple acquisition module is changed by the loop cycle gathering the resistance both end voltage be connected with amplifier, and amplified by amplifier, to make controller 140 judge the working condition of motor 110 by the feedback signal FB1 to FB4 of four amplifier outs, thus improve MOD security in use and stability
As a concrete example, as shown in Figure 2, the circuit theory diagrams of MOD drive unit according to an embodiment of the invention.In this example, multiple acquisition module 130 comprises four, and specifically, multiple acquisition module 130 comprises: four operational amplifiers of resistance R1 to resistance R4 and corresponding four resistance.
Four circuits of driving chip to motor are connected in series a small resistor (R1 to R4) respectively, and each resistance two ends lead-in wire accesses an operational amplifier respectively, and the output access controller 140 of four operational amplifiers.
When needs drive motor, controller 140 sends four control signals to driver 120, driver 120 receives and inverted signal is can the voltage that rotates of drive motors 110, and is supplied to motor 110 by circuit A, A1, B, B1, makes motor 110 drive and operate.In above-mentioned drive circuit, when a certain road drives work, this circuit turn-on, small resistor has electric current pass through, and thus the two ends of small resistor produce differential signal; This differential signal feeds back to controller 140 after being amplified by operational amplifier, and controller 140 judges according to the size of feedback signal the operating condition that motor is current.Particularly, when the differential signal fed back very large or identical with the period of change of the control signal that controller 140 sends time, then show that motor 110 works well, if the differential signal of feedback is very little or different from the period of change of the control signal that controller 140 sends, then show that motor 110 breaks down, controller 140 meeting warning reminding user or maintenance personal's motor break down, and on-call maintenance, improves the stability of refrigerator.
MOD drive unit according to the embodiment of the present invention adopts close-loop control mode, can the working condition of monitor driver and whether fault in real time, thus MOD whether action and the whether normal MOD drive unit of action can be detected, there is the advantage that reliability is high and stability is strong.
Further embodiment of the present invention also proposed a kind of refrigerator, comprises the MOD drive unit that first aspect present invention embodiment proposes.
According to refrigerator of the present invention, the MOD drive unit of this refrigerator adopts close-loop control mode, can the working condition of monitor driver and whether fault in real time, thus MOD whether action and the whether normal MOD drive unit of action can be detected, there is the advantage that reliability is high and stability is strong, thus make user or maintenance personal can judge the duty that MOD is current to improve the stability of refrigerator complete machine according to the feedback signal of circuit.Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalency thereof.
Claims (5)
1. a MOD drive unit, is characterized in that, comprising:
Motor;
Driver, described driver is connected with described motor, for driving described motor;
Multiple sampling module, described multiple sampling module is connected between described motor and described driver;
Controller, described controller is connected with described multiple sampling module with described driver respectively, described controller generates multiple control signal, wherein, each in described multiple control signal changes according to predetermined period, described controller judges whether the change of multiple voltages of described multiple sampling module collection meets described predetermined period, and when at least one does not meet described predetermined period in the change of multiple voltages judging described multiple sampling module collection, judge that described motor breaks down.
2. MOD drive unit as claimed in claim 1, it is characterized in that, described multiple control signal is four control signals, described multiple sampling module is four sampling modules, and described driver generates four corresponding drive singal to drive described motor by four connecting lines according to described four control signals.
3. MOD drive unit as claimed in claim 2, it is characterized in that, described four sampling modules comprise:
First to fourth resistance, described first to fourth resistance is connected on described four connecting lines.
4. the MOD drive unit as described in any one of claim 1-3, is characterized in that, described sampling module also comprises:
First to fourth amplifier, the first input end of described first to fourth amplifier and the second input are connected to the two ends of described first to fourth resistance, and the output of described amplifier is connected with described controller.
5. a refrigerator, is characterized in that, comprises the MOD drive unit as described in any one of claim 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210510564.0A CN102980347B (en) | 2012-12-03 | 2012-12-03 | Electric air door driving device and refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210510564.0A CN102980347B (en) | 2012-12-03 | 2012-12-03 | Electric air door driving device and refrigerator |
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| Publication Number | Publication Date |
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| CN102980347A CN102980347A (en) | 2013-03-20 |
| CN102980347B true CN102980347B (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210510564.0A Active CN102980347B (en) | 2012-12-03 | 2012-12-03 | Electric air door driving device and refrigerator |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107525317B (en) * | 2016-06-21 | 2019-11-12 | 珠海格力电器股份有限公司 | A kind of control device of electric expansion valve, air-conditioning and its discretionary protection method |
| CN108955005A (en) * | 2017-05-24 | 2018-12-07 | 杭州三花研究院有限公司 | control system and control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4422571A (en) * | 1981-05-22 | 1983-12-27 | Hoffman Controls Corp. | Proportional motor drive control |
| EP0255266A3 (en) * | 1986-07-28 | 1988-05-11 | Whirlpool Corporation | Temperature responsive baffle control circuit for a refrtemperature responsive baffle control circuit for a refrigerator igerator |
| CN1464278A (en) * | 2002-06-14 | 2003-12-31 | 海尔集团公司 | Refrigerator electric control air door control device |
| CN1910415A (en) * | 2004-01-20 | 2007-02-07 | 开利公司 | Zone damper fault detection in an hvac system |
| CN203036940U (en) * | 2012-12-03 | 2013-07-03 | 合肥美的荣事达电冰箱有限公司 | Electric air door driving device and refrigerator |
-
2012
- 2012-12-03 CN CN201210510564.0A patent/CN102980347B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4422571A (en) * | 1981-05-22 | 1983-12-27 | Hoffman Controls Corp. | Proportional motor drive control |
| EP0255266A3 (en) * | 1986-07-28 | 1988-05-11 | Whirlpool Corporation | Temperature responsive baffle control circuit for a refrtemperature responsive baffle control circuit for a refrigerator igerator |
| CN1464278A (en) * | 2002-06-14 | 2003-12-31 | 海尔集团公司 | Refrigerator electric control air door control device |
| CN1910415A (en) * | 2004-01-20 | 2007-02-07 | 开利公司 | Zone damper fault detection in an hvac system |
| CN203036940U (en) * | 2012-12-03 | 2013-07-03 | 合肥美的荣事达电冰箱有限公司 | Electric air door driving device and refrigerator |
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| CN102980347A (en) | 2013-03-20 |
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| C06 | Publication | ||
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| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 230601 Hefei Changjiang Road, Anhui, No. 669 Applicant after: Hefei Midea Refrigerator Co., Ltd. Address before: 230601 Hefei Changjiang Road, Anhui, No. 669 Applicant before: Hefei Media Rongshida Refrigerator Co., Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: HEFEI MEDIA RONGSHIDA REFRIGERATOR CO., LTD. TO: HEFEI MIDEA REFRIGERATORCO., LTD. |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |