CN114658681A - Refrigerator fan detection method - Google Patents
Refrigerator fan detection method Download PDFInfo
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- CN114658681A CN114658681A CN202210398917.6A CN202210398917A CN114658681A CN 114658681 A CN114658681 A CN 114658681A CN 202210398917 A CN202210398917 A CN 202210398917A CN 114658681 A CN114658681 A CN 114658681A
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- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 22
- 230000002159 abnormal effect Effects 0.000 abstract description 7
- 238000005057 refrigeration Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- 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
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a refrigerator fan detection method, and relates to the technical field of refrigerator detection. Including the detecting system, the detecting system includes: the refrigerator control panel, the computer, the power acquisition appearance, detecting system's operation step does: when the refrigerator plug is connected with a power supply of the test line, the refrigerator control panel controls the refrigerator fan to operate according to a set rule, the power acquisition instrument acquires the operating power of the refrigerator in real time and transmits data to the computer, the computer detection software compares the received data with a set data interval, the received data judges that the fan is normal in the data interval, and the received data judges that the fan is in fault outside the data interval. The fan is judged to be qualified, and the page display test of the computer test software passes; the fan judges the fault, and the computer test software page displays that the test fails. The invention can be configured in the factory detection process of the refrigerator, can independently detect the fan before the factory detection of the refrigerator, has high efficiency, and can effectively screen the problems of no start of the fan, no speed regulation of the fan and abnormal speed regulation of the fan.
Description
Technical Field
The invention belongs to the technical field of refrigerator detection, and particularly relates to a refrigerator fan detection method.
Background
At present, direct current fans have become widely popular in household refrigerator products. Because the demand of refrigerating in the refrigerator compartment is constantly changed, the fan generally has the capacity of adjusting the rotating speed in the working process. There are two common ways of adjusting the speed, adjusting the input voltage and adjusting the duty cycle of the input signal.
The input voltage is adjusted, three outgoing lines of a common fan are respectively a power input line (anode and cathode) and a feedback line, and the feedback line can monitor the state of the fan in real time in the working engineering of the motor. The input voltage is adjusted, the voltage adjusting range (rated voltage of the direct current motor is 12V, starting voltage is about 7V, and the adjusting range (12V-7V)) is small, and the fan cannot be started under the condition that the voltage drops too low. The speed regulation mode has a limited speed regulation range, the refrigeration requirement of a refrigerator compartment which is complex cannot be realized, the application proportion of the whole machine is smaller and smaller, and the whole machine is gradually eliminated.
In the mode of adjusting the duty ratio of an input signal, three outgoing lines of a common fan are respectively a power input line (a positive electrode and a negative electrode) and a signal line, and the signal line transmits a duty ratio signal but cannot monitor the real-time state of the fan. The duty ratio mode of the input signal is adjusted, the adjustment range of the duty ratio (the duty ratio is 100% -5%) is large, and the method is more suitable for refrigeration requirements of the refrigerator under different running state conditions. The fan can rotate at the duty ratio of more than 5% of the input signal, and the fan stops rotating at the duty ratio of less than 5%. Under the condition of 100% duty ratio (rated rotation speed), the rotation speed of the fan is the highest, the output power is the highest, and the lower the duty ratio is, the lower the rotation speed of the fan is, the lower the output power is.
The mode of adjusting the duty ratio of the input signal is the most common fan speed regulation method used by refrigerator products, and the speed regulation mode has wide fan speed regulation range and strong applicability.
However, the fan has no feedback line, the running state of the fan cannot be monitored, the actual state of the fan is not favorably judged, and under the damaged condition, the problems that the fan does not rotate, the speed of the fan is not regulated, the fan can only regulate the speed in partial intervals and the like may occur. If a feedback line is added to the fan, the standardization of the fan is affected, and the number of the fans on the refrigerator is often more than one, so that the design requirement on a refrigerator control board chip is higher, the product cost is increased, and the product competitiveness is reduced.
The fan is tested before leaving factory, and the fan can be packed and boxed only if the performance of the fan meets the design requirement. The fan failure problem is mainly generated in the process of delivery, transportation, assembly and installation of the components to the refrigerator, the fan can be damaged to different degrees due to static electricity, misoperation, artificial damage and the like, and if the failed fan can be screened out in the process, the fan failure problem in the subsequent market can be greatly reduced.
The existing test scheme can judge that the electrified fan is not started, but cannot effectively detect the problems of speed regulation failure or abnormal speed regulation of the fan and the like. The performance of the refrigerator is greatly influenced by the fact that the fan does not regulate speed or the speed is abnormal, and the problems of high noise, abnormal temperature and the like of the refrigerator can be caused.
Disclosure of Invention
The invention aims to provide a refrigerator fan detection method, which can comprehensively detect fans once before the refrigerator leaves the factory by a special detection method on the premise of ensuring that the fans (the type of adjusting the duty ratio of an input signal) are not changed, screen out unqualified fans, ensure that all the fans installed on the refrigerator are qualified fan products, and solve the problem that the existing test scheme cannot effectively detect the problems of non-speed regulation or abnormal speed regulation of the fans and the like.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a refrigerator fan detection method, which comprises a detection system; the detection system comprises: the refrigerator control panel sends an action instruction to the refrigerator fan and controls the starting, stopping and action states of the refrigerator fan; the computer is internally provided with refrigerator detection software, can set the upper and lower limit ranges of a power curve before testing, draws the received power value in a test software curve graph in real time in the testing process, and automatically judges whether the test is qualified according to whether the received data curve is in a boundary curve; the power acquisition instrument can detect the power information of the refrigerator and send the power information to the test computer in real time;
the detection system operates according to the following steps:
s1: powering on the refrigerator, and enabling all loads to enter a standby state;
s2: the control board sends a PWM signal with a duty ratio of X% to the fan and continuously operates for T seconds;
s3: the power acquisition instrument detects the real-time power of the refrigerator and transmits data to the computer;
s4: the refrigerator detection software on the computer compares the received data with a set data interval and judges whether the fan is qualified or not;
the S4 includes the following substeps:
s41: judging whether the fan can be started or not;
s42: if the fan can be started, continuously judging whether the speed of the fan can be adjusted;
s43: if the speed can be adjusted, whether the fan can be closed or not is continuously judged;
if the product can be closed, the product is qualified and the judgment is finished;
the X is X1 or X2 or X3, and the T is T1 or T2 or T3.
As a preferred technical solution of the present invention, the computer detection software in S4 compares the received data with the set data interval, and specifically performs the following operations:
displaying the received data in real time in a graph mode in computer test software;
and judging whether the graph display curve is in the boundary curve or not.
As a preferred technical solution of the present invention, the step S41 of determining whether the fan can be started includes:
the control board sends a PWM signal with a duty ratio of X1% to the fan and continuously operates for T1 seconds, if the power curve is not in the boundary curve, the fan cannot be started, the product is unqualified, and the judgment is finished;
if the power curve is within the boundary curve, it indicates that the fan may be activated.
As a preferable embodiment of the present invention, when the determination as to whether the fan is adjustable is continued in S42, the operation is specifically:
the control board sends a PWM signal with the duty ratio of X2% to the fan, the fan continuously runs for T2 seconds, if the power curve is not in the boundary curve, the fan cannot regulate the speed, the product is unqualified, and the judgment is finished;
if the power curve is within the boundary curve, the fan is adjustable in speed.
As a preferable aspect of the present invention, when the determination as to whether or not the fan can be turned off is continued in S43, the method further includes:
the control board sends a PWM signal with a duty ratio of X3% to the fan and continuously runs for T3 seconds, if the power curve is not in the boundary curve, the fan cannot be closed, the product is unqualified, and the judgment is finished;
if the power curve is in the boundary curve, the fan can be closed, the product is qualified, and the judgment is finished.
As a preferable technical scheme of the invention, the value ranges of X1 and X2 are 5-100, the values of X1 and X2 are different, and the value range of X3 is 0-5.
In a preferred embodiment of the present invention, the ranges of T1, T2 and T3 are 30 to 600.
In a preferred embodiment of the present invention, the ranges of T1, T2 and T3 are 30 to 600.
The invention has the following beneficial effects:
the invention can be configured in the factory detection process of the refrigerator, independently detect the fan before the factory detection of the refrigerator, has short time consumption and high efficiency, does not influence the factory performance test of the refrigerator, and can effectively screen the problems of no start of the fan, no speed regulation of the fan and abnormal speed regulation of the fan. The refrigerator fan is screened out before leaving the factory, so that the probability of problems of the fan in the subsequent market can be greatly reduced, and the quality level of the product can be effectively improved.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow diagram of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
Referring to fig. 1, a method for detecting a refrigerator fan includes a detection system and a detection method, wherein the detection system includes: comprises a refrigerator control panel, a refrigerator fan, a power acquisition instrument and a computer.
The refrigerator control panel sends an action instruction to the refrigerator fan, and can control the starting, stopping and action states of the refrigerator fan.
The refrigerator fan receives the instruction information sent by the refrigerator control board and executes corresponding actions (full-speed rotation, specific rotating speed rotation and stop rotation).
The power acquisition instrument can monitor the power information of the refrigerator and send the power information to the test computer in real time;
the computer is internally provided with refrigerator detection software, the upper and lower limit ranges (boundary curves) of a power curve can be set before testing, the received power value is drawn in a test software curve graph in real time in the testing process, and whether the test is qualified or not is automatically judged according to whether the received data curve is in the boundary curve or not. The detection software has registration numbers as follows: 2011SR085199 soft work: refrigeration performance detecting system.
The detection method comprises the following steps: when the refrigerator plug is connected with a power supply of the test line, the refrigerator control panel controls the refrigerator fan to operate according to a set rule, the power acquisition instrument acquires the operating power of the refrigerator in real time and transmits data to the computer, the computer detection software compares the received data with a set data interval, the received data judges that the fan is normal in the data interval, and the received data judges that the fan is in fault outside the data interval. Judging that the fan is qualified, and displaying a page of computer test software to pass the test; the fan judges the fault, and the computer test software page displays that the test fails.
The specific control method comprises the following steps:
1. placing a test wire into the refrigerator, connecting the plug into the socket, and electrifying the refrigerator to run;
2. the refrigerator control board sends a PWM signal with a duty ratio of X1% to a refrigerator fan for T1 seconds;
3. the power acquisition instrument detects the real-time power of the refrigerator and displays the received data in real time in a curve diagram mode in computer test software;
3.1, if the curve displayed by the curve chart is not in the boundary curve (no power), judging that the fan is not started, and testing the fan to be unqualified;
3.2, if the curve displayed by the curve chart is in the boundary curve, judging that the fan can be started, and continuing the test;
3.2.1, the refrigerator control board sends a PWM signal with the duty ratio of X2% to a refrigerator fan for T2 seconds;
3.2.2, the power acquisition instrument detects the real-time power of the refrigerator and displays the received data in a computer test software in a curve graph mode in real time;
3.2.2.1, if the curve displayed by the curve chart is not in the boundary curve (the power is unchanged), judging that the fan does not regulate the speed, and testing the fan to be unqualified;
3.2.2.2, if the curve shown by the curve chart is in the boundary curve (the power is reduced), judging that the speed of the fan can be regulated, and continuing the test;
3.2.2.2.1, the refrigerator control board sends a PWM signal with a duty ratio of X3% to the refrigerator fan for T3 seconds;
3.2.2.2.2, detecting real-time power of the refrigerator by a power acquisition instrument, and displaying the received data in real time in a graph mode in computer test software;
3.2.2.2.2.1, if the curve shown by the graph is not in the boundary curve (the power is unchanged), judging that the fan cannot be closed, and failing the test;
3.2.2.2.2.2, if the curve is in the boundary curve (no power), the fan is judged to be closed, the test is qualified, the computer test software displays that the fan passes, and the test is finished.
X1 and X2 take the value in the middle of 100-5, and X1 and X2 have different values; x3 is intermediate between 0 and 5;
t1, T2 and T3 are values within 30 seconds to 10 minutes generally, and particularly need to be seen according to different refrigerator working conditions, if a curve graph is sensitive and easy to see, 30 seconds are selected, if the curve graph is not easy to see, the time can be properly prolonged, and the three T time processes can be the same or different.
The invention can be configured in the factory detection process of the refrigerator, independently detect the fan before the factory detection of the refrigerator, has short time consumption and high efficiency, does not influence the factory performance test of the refrigerator, and can effectively screen the problems of no start of the fan, no speed regulation of the fan and abnormal speed regulation of the fan. The refrigerator fan is screened out before leaving the factory, so that the probability of the fan in the subsequent market having problems can be greatly reduced, and the quality level of products can be effectively improved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. A refrigerator fan detection method is characterized in that: comprises a detection system;
the detection system comprises:
the refrigerator control panel sends an action instruction to the refrigerator fan and controls the starting, stopping and action states of the refrigerator fan;
the computer is internally provided with refrigerator detection software, can set the upper and lower limit ranges of a power curve before testing, draws the received power value in a test software curve graph in real time in the testing process, and automatically judges whether the test is qualified according to whether the received data curve is in a boundary curve;
the power acquisition instrument can detect the power information of the refrigerator and send the power information to the test computer in real time;
the detection system operates according to the following steps:
s1: powering on the refrigerator, and enabling all loads to enter a standby state;
s2: the control panel sends a PWM signal with a duty ratio of X% to the fan and continuously operates for T seconds;
s3: the power acquisition instrument detects the real-time power of the refrigerator and transmits data to the computer;
s4: the refrigerator detection software on the computer compares the received data with a set data interval and judges whether the fan is qualified or not;
the S4 includes the following substeps:
s41: judging whether the fan can be started or not;
s42: if the fan can be started, continuously judging whether the speed of the fan can be adjusted;
s43: if the speed can be adjusted, whether the fan can be closed or not is continuously judged;
if the product can be closed, the product is qualified and the judgment is finished;
the X is X1 or X2 or X3, and the T is T1 or T2 or T3.
2. The method as claimed in claim 1, wherein the computer detection software in S4 compares the received data with the set data interval, and specifically comprises:
displaying the received data in real time in a graph mode in computer test software;
and judging whether the graph display curve is in the boundary curve or not.
3. The method as claimed in claim 1, wherein the step of determining whether the fan can be started in S41 includes:
the control board sends a PWM signal with a duty ratio of X1% to the fan and continuously operates for T1 seconds, if the power curve is not in the boundary curve, the fan cannot be started, the product is unqualified, and the judgment is finished;
if the power curve is within the boundary curve, it indicates that the fan may be activated.
4. The method as claimed in claim 1, wherein when the determination of whether the fan is adjustable in S42 is continued, the method is specifically operated as follows:
the control board sends a PWM signal with a duty ratio of X2% to the fan, the fan continuously runs for T2 seconds, if the power curve is not in the boundary curve, the fan cannot regulate the speed, the product is unqualified, and the judgment is finished;
if the power curve is within the boundary curve, the fan is adjustable in speed.
5. The method as claimed in claim 1, wherein when the determination of whether the fan can be turned off is continued in S43, the method is specifically configured to:
the control board sends a PWM signal with the duty ratio of X3% to the fan, the fan continuously runs for T3 seconds, if the power curve is not in the boundary curve, the fan cannot be closed, the product is unqualified, and the judgment is finished;
if the power curve is in the boundary curve, the fan can be closed, the product is qualified, and the judgment is finished.
6. The refrigerator fan detection method as claimed in claim 1, wherein the value ranges of X1 and X2 are 5-100, the values of X1 and X2 are different, and the value range of X3 is 0-5.
7. The refrigerator fan detecting method as claimed in claim 1, wherein the ranges of T1, T2 and T3 are 30-600.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210398917.6A CN114658681A (en) | 2022-04-15 | 2022-04-15 | Refrigerator fan detection method |
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| CN202210398917.6A CN114658681A (en) | 2022-04-15 | 2022-04-15 | Refrigerator fan detection method |
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| US8539783B1 (en) * | 2004-02-11 | 2013-09-24 | Supermarket Energy Technologies, LLC | System for preventing condensation on refrigerator doors and frames |
| CN104424067A (en) * | 2013-08-28 | 2015-03-18 | 鸿富锦精密工业（深圳）有限公司 | Fan module testing method and system |
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| CN107327412A (en) * | 2016-04-29 | 2017-11-07 | 成都韵能科技有限公司 | The electric fan shown with power |
| US20170350403A1 (en) * | 2016-06-07 | 2017-12-07 | Microsoft Technology Licensing, Llc | Fan failure detection and reporting |
| CN114251285A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
-
2022
- 2022-04-15 CN CN202210398917.6A patent/CN114658681A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10246546A (en) * | 1997-03-07 | 1998-09-14 | Fujitsu Ltd | Method for detecting rotation of fan and fan controller |
| US8539783B1 (en) * | 2004-02-11 | 2013-09-24 | Supermarket Energy Technologies, LLC | System for preventing condensation on refrigerator doors and frames |
| CN101460791A (en) * | 2006-04-25 | 2009-06-17 | 开利公司 | Malfunction detection for fan or pump in refrigerant system |
| CN104424067A (en) * | 2013-08-28 | 2015-03-18 | 鸿富锦精密工业（深圳）有限公司 | Fan module testing method and system |
| CN107208916A (en) * | 2015-02-11 | 2017-09-26 | 伊莱克斯家用电器股份公司 | For the method for the function of checking multiple fans |
| CN107327412A (en) * | 2016-04-29 | 2017-11-07 | 成都韵能科技有限公司 | The electric fan shown with power |
| US20170350403A1 (en) * | 2016-06-07 | 2017-12-07 | Microsoft Technology Licensing, Llc | Fan failure detection and reporting |
| CN114251285A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
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