CN101477165B - Integrated test system for security and efficiency of washing machine - Google Patents
Integrated test system for security and efficiency of washing machine Download PDFInfo
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- CN101477165B CN101477165B CN2009100952437A CN200910095243A CN101477165B CN 101477165 B CN101477165 B CN 101477165B CN 2009100952437 A CN2009100952437 A CN 2009100952437A CN 200910095243 A CN200910095243 A CN 200910095243A CN 101477165 B CN101477165 B CN 101477165B
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Abstract
The invention discloses a safety and energy efficiency test system for a washing machine. A first power frequency converter is connected with a first switching circuit, a second switching circuit, a third switching circuit and a fourth switching circuit respectively, a second power frequency converter is connected with the first switching circuit, the second switching circuit, the third switching circuit and the fourth switching circuit respectively, the first switching circuit is connected with a first digital electric parameter instrument through a first electric voltage regulator, the second switching circuit is connected with a second digital electric parameter instrument through a second electric voltage regulator, the third switching circuit is connected with a third digital electric parameter instrument through a third electric voltage regulator, and the fourth switching circuit is connected with a fourth digital electric parameter instrument through a fourth electric voltage regulator. The system has the advantages that the system can obtain a plurality of power supplies with different frequencies and different voltages for a plurality of digital electric parameter instruments, and a plurality of measured electric appliances need to obtain the power supplies with different frequencies and different voltages from the plurality of the digital electric parameter instruments, thereby reducing the number of the power frequency converters and ensuring that the power frequency converters are fully utilized.
Description
Technical field
The present invention relates to a kind of household electrical appliance detection test and use the battery of tests system, especially relate to a kind of washing machine safety and efficiency integrated test system.
Background technology
In July, 2005, European Union has formally issued Eup (Energy-using Products) instruction at energy-consuming product, is intended to enforcement by this instruction and reduces energy-consuming product to the consumption of resource and to the influence of environment.And washing machine as and refrigerator and air-conditioning three big energy-consuming products arranged side by side, the detection of its efficiency is just become the emphasis of tackling new exit instruction.The pressure efficiency that China has also started at washing machine in March, 2007 identifies system, economizes on resources to encourage the low energy consumption product.When washing machine being carried out the combination property detection, to test parameters such as the maximum temperature of each position heating of washing machine dynamic electric voltage, electric current, Maximum Power Output, average power, electrical equipment and efficiencies respectively, and carry out corresponding raw readings, according to each related standards, carry out the parameter area comparison and form whether qualified conclusion report again.
When at present washing machine being tested, connect each testing tool by block scheme shown in Figure 1, there is certain shortcoming in this test macro, one: detecting the outlet household appliances is in master's the laboratory, because of various countries' voltage and frequency inequality, as 110V/50HZ, 220V/60HZ or the like, different washing machines adopt different voltage and frequency, therefore need a lot of power converters when test.Because the price comparison costliness of power converter, a power converter is only done detection for a washing machine, causes the power converter utilization factor lower, simultaneously because the low load running of power converter causes a large amount of energy dissipations.
Its two: at present, when each part temperatures of a washing machine was measured, moisture recorder directly was connected with thermopair, and thermopair is connected with each parts point for measuring temperature of washing machine.Before test, needs manually are arranged in the thermopair of One's name is legion on each parts point for measuring temperature of this washing machine in advance, finish very consuming time of this process, need at least to spend 2 hours, need one day time at most, after finishing each point for measuring temperature of layout, power converter, digital electrical quantity instrument and moisture recorder are just started working.Therefore in the whole process of arranging each point for measuring temperature, this moisture recorder is being left unused always, and is also all leaving unused with power converter that is linked to each other by electricity measurer and digital electrical quantity instrument, has therefore caused the unnecessary wasting of resources.
Its three: testing tools such as power converter, digital electrical quantity instrument and moisture recorder are seated in test site, because washing machine in testing process has that water overflows or unexpected water phenomenon such as is gone out and taken place, can cause the humidity of air to increase, expensive instrument and equipment is subjected to the influence of wet environment, can make the lost of life of instrument, even cause the damage of instrument, this not only causes damage economically, and experiment is interrupted, and must operate again, wasted manpower.
Summary of the invention
Technical matters to be solved by this invention provides high washing machine safety of a kind of power converter utilization factor and efficiency test macro.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of washing machine safety and efficiency test macro, comprise power converter group and digital electrical quantity instrument group and moisture recorder group, described power converter group comprises first power converter and second source frequency converter, numeral electrical quantity instrument group comprises the first digital electrical quantity instrument, the second digital electrical quantity instrument, the 3rd digital electrical quantity instrument and the 4th digital electrical quantity instrument, the moisture recorder group comprises first moisture recorder, second moisture recorder, the 3rd moisture recorder and the 4th moisture recorder, described first power converter and described second source frequency converter are electrically connected with the city respectively, described first moisture recorder, second moisture recorder, the 3rd moisture recorder and the 4th moisture recorder are electrically connected with the city respectively, the described first digital electrical quantity instrument is connected by electricity measurer with first, the described second digital electrical quantity instrument is connected by electricity measurer with second, the 3rd digital electrical quantity instrument is connected by electricity measurer with the 3rd, the described the 4th digital electrical quantity instrument is connected by electricity measurer with the 4th, described first moisture recorder is connected by electricity measurer with first, described second moisture recorder is connected by electricity measurer with second, the 3rd moisture recorder is connected by electricity measurer with the 3rd, described the 4th moisture recorder is connected by electricity measurer with the 4th
Described first power converter respectively with first commutation circuit, second commutation circuit, the 3rd commutation circuit is connected with the 4th commutation circuit, described second source frequency converter respectively with first commutation circuit, second commutation circuit, the 3rd commutation circuit is connected with the 4th commutation circuit, described first commutation circuit is connected with the described first digital electrical quantity instrument by first electric voltage regulator, described second commutation circuit is connected with the described second digital electrical quantity instrument by second electric voltage regulator, described the 3rd commutation circuit is connected with the described the 3rd digital electrical quantity instrument by the 3rd electric voltage regulator, and described the 4th commutation circuit is connected with the described the 4th digital electrical quantity instrument by the 4th electric voltage regulator.
It also includes the test terminal installing plate, described test terminal installing plate is provided with tested appliances power source socket group and thermopair interface array group, tested appliances power source socket group comprises the first tested appliances power source socket, the second tested appliances power source socket, the 3rd tested appliances power source socket and the 4th tested appliances power source socket, thermopair interface array group comprises the first thermopair interface array, the second thermopair interface array, three thermocouple interface array and the 4th thermopair interface array, the described first thermopair interface array comprises the first thermopair receptacle array and the first acting thermocouple plug array, the described second thermopair interface array comprises the second thermopair receptacle array and the second acting thermocouple plug array, described three thermocouple interface array comprises three thermocouple receptacle array and three thermocouple plug array, described the 4th thermopair interface array comprises the 4th thermopair receptacle array and the 4th acting thermocouple plug array, the described first acting thermocouple plug array cooperates with the described first thermopair receptacle array, the described second acting thermocouple plug array cooperates with the second thermopair receptacle array, described three thermocouple plug array cooperates with described three thermocouple receptacle array, described the 4th acting thermocouple plug array cooperates with the 4th thermopair receptacle array
The described first tested appliances power source socket is connected with the described first digital electrical quantity instrument, the described second tested appliances power source socket is connected with the described second digital electrical quantity instrument, the described the 3rd tested appliances power source socket is connected with the described the 3rd digital electrical quantity instrument, the described the 4th tested appliances power source socket is connected with the described the 4th digital electrical quantity instrument
The described first thermopair receptacle array is connected with first moisture recorder, the described second thermopair receptacle array is connected with second moisture recorder, described three thermocouple receptacle array is connected with the 3rd moisture recorder, described the 4th thermopair receptacle array is connected with the 4th moisture recorder
A plurality of thermopairs that the described first acting thermocouple plug array connects are arranged in first by each point for measuring temperature of electricity measurer, a plurality of thermopairs that the described second acting thermocouple plug array connects are arranged in second by each point for measuring temperature of electricity measurer, a plurality of thermopairs that described three thermocouple plug array connects are arranged in the 3rd by each point for measuring temperature of electricity measurer, and a plurality of thermopairs that described the 4th galvanic couple plug array connects are arranged in the 4th by each point for measuring temperature of electricity measurer.
Described power converter group, digital electrical quantity instrument group, moisture recorder group, each commutation circuit and each electric voltage regulator are arranged in the test switch board, and described test terminal installing plate is arranged on away from described test switch board place.
The output voltage of described first power converter is 220V, and frequency is 50HZ, and the output voltage of described second source frequency converter is 220V, and frequency is 60HZ.
The thermopair that the described first thermopair receptacle array, the second thermopair receptacle array, three thermocouple receptacle array are connected with the 4th thermopair receptacle array all is 20～40.
Compared with prior art, the invention has the advantages that between power converter and the digital electrical quantity instrument and added commutation circuit and electric voltage regulator, the power supply that can obtain multiple different frequency and different voltages is supplied with a plurality of digital electrical quantity instrument, a plurality of power supplys that can be obtained different frequency and different voltages by electricity measurer as required from a plurality of digital electrical quantity instrument, reduced the quantity of power converter, power converter is fully utilized.
Two power converters are subjected to electricity from civil power (220V/50Hz), because parameters such as the voltage stabilizing rate of civil power, waveform distortion factor can not satisfy the requirement of examination criteria, must detect through just being used for behind the power converter.The output of first power converter is set to 220V/50Hz, the output of second source frequency converter is set to 220V/60Hz, its voltage stabilizing rate, waveform distortion factor, precision reach the standard of test request, select supply frequency by commutation circuit for four stations, four stations can be according to the voltage of selecting to obtain 220V50Hz or 220V 60Hz, and then regulate by electric voltage regulator and to obtain required supply voltage, can obtain arbitrary power supply that 5～300V, 50Hz or 60Hz do not have ladder.In test process, on one side regulate electric voltage regulator, observe voltage, electric current and the power video data of digital electrical quantity instrument on one side, obtain at last needs by the power supply of electricity measurer.Work simultaneously for four above stations with two power converters, saved plural power converter, power converter is utilized fully.
Thermopair interface on the installing plate of test terminal comprises thermopair socket and acting thermocouple plug, the thermopair socket is connected with moisture recorder, acting thermocouple plug is connected with thermopair, thermopair be connected by the point for measuring temperature of electricity measurer, moisture recorder just can be from being measured temperature value by each parts of electricity measurer like this.In test during numerous each part temperatures of a washing machine, idle personnel can arrange each parts point for measuring temperature of next tested washing machine, just will have numerous thermopairs of acting thermocouple plug and each parts of washing machine all connects, etc. last washing machine after all test finishes, the acting thermocouple plug that a last washing machine is connected pulls out from the thermopair socket, tested appliances power source plug pulls out from supply socket, before testing next washing machine, only the acting thermocouple plug that this washing machine connects need be inserted on the thermopair socket, tested appliances power source plug is inserted in the supply socket just passable, this process only needs time a few minutes, compare that required time reduces two hours at least on the point for measuring temperature that originally thermopair that connects on the moisture recorder is arranged into each parts of washing machine, improved moisture recorder by contrast widely, the utilization ratio of power converter and digital electrical quantity instrument.
The test terminal installing plate is arranged on away from test switch board place, therefore tests switch board away from tested washing machine.In test washing machine process, the water of washing machine overflows or unexpected water such as goes out at phenomenon, cause the humidity of air to increase, not can to away from the test switch board in power converter group, digital electrical quantity instrument group, moisture recorder group, each commutation circuit and each electric voltage regulator cause damage.
Description of drawings
Fig. 1 is the block scheme of prior art;
Fig. 2 is a block scheme of the present invention;
Fig. 3 is single station circuit theory diagrams of the present invention;
Fig. 4 is electric voltage regulator voltage up-down Principles of Regulation figure of the present invention;
Fig. 5 is a commutation circuit schematic diagram of the present invention;
Fig. 6 is the structural representation of tested appliances power source socket, thermopair socket and acting thermocouple plug on the installing plate of test terminal of the present invention.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
A kind of washing machine safety and efficiency test macro, comprise power converter group and digital electrical quantity instrument group and moisture recorder group, the power converter group comprises first power converter 1 and second source frequency converter 2, the output voltage of first power converter is 220V, frequency is 50HZ, the output voltage of second source frequency converter is 220V, and frequency is 60HZ.
Numeral electrical quantity instrument group comprises the first digital electrical quantity instrument 3, the second digital electrical quantity instrument 4, the 3rd digital electrical quantity instrument 5 and the 4th digital electrical quantity instrument 6, the moisture recorder group comprises first moisture recorder 7, second moisture recorder 8, the 3rd moisture recorder 9 and the 4th moisture recorder 10, first power converter 1 and second source frequency converter 2 are electrically connected with the city respectively, first moisture recorder 7, second moisture recorder 8, the 3rd moisture recorder 9 and the 4th moisture recorder 10 are electrically connected with the city respectively, the first digital electrical quantity instrument 3 is connected by electricity measurer 11 with first, the second digital electrical quantity instrument 4 is connected by electricity measurer 12 with second, the 3rd digital electrical quantity instrument 5 is connected by electricity measurer 13 with the 3rd, the 4th digital electrical quantity instrument 6 is connected by electricity measurer 14 with the 4th, first moisture recorder 7 is connected by electricity measurer 11 with first, second moisture recorder 8 is connected by electricity measurer 12 with second, the 3rd moisture recorder 9 is connected by electricity measurer 13 with the 3rd, the 4th moisture recorder 10 is connected by electricity measurer 14 with the 4th
It also includes test terminal installing plate 22, test terminal installing plate 22 is provided with tested appliances power source socket group and thermopair interface array group, tested appliances power source socket group comprises the first tested appliances power source socket 23, the second tested appliances power source socket 24, the 3rd tested appliances power source socket 25 and the 4th tested appliances power source socket 26, thermopair interface array group comprises the first thermopair interface array 27, the second thermopair interface array 28, three thermocouple interface array 29 and the 4th thermopair interface array 30, the described first thermopair interface array 27 comprises the first thermopair receptacle array and the first acting thermocouple plug array, the described second thermopair interface array 28 comprises the second thermopair receptacle array and the second acting thermocouple plug array, described three thermocouple interface array 29 comprises three thermocouple receptacle array and three thermocouple plug array, described the 4th thermopair interface array 30 the 4th thermopair receptacle array and the 4th acting thermocouple plug array, the first acting thermocouple plug array cooperates with the first thermopair receptacle array, the second acting thermocouple plug array cooperates with the second thermopair receptacle array, three thermocouple plug array cooperates with the three thermocouple receptacle array, the 4th acting thermocouple plug array cooperates with the 4th thermopair receptacle array, the first thermopair receptacle array, the second thermopair receptacle array, the thermopair that the three thermocouple receptacle array is connected with the 4th thermopair receptacle array all is 30.The quantity of thermopair also can be 20 or 40.Each thermopair receptacle array is made up of 30 thermopair sockets 31, and each acting thermocouple plug array is made up of 30 acting thermocouple plugs 32.
The first tested appliances power source socket is connected with the first digital electrical quantity instrument 3, the second tested appliances power source socket is connected with the second digital electrical quantity instrument 4, the 3rd tested appliances power source socket is connected with the 3rd digital electrical quantity instrument 5, and the 4th tested appliances power source socket is connected with the 4th digital electrical quantity instrument 6
The first thermopair receptacle array is connected with first moisture recorder 7, the second thermopair receptacle array is connected with second moisture recorder 8, the three thermocouple receptacle array is connected with the 3rd moisture recorder 9, and the 4th thermopair receptacle array is connected with the 4th moisture recorder 10
A plurality of thermopairs that the first acting thermocouple plug array connects are arranged in first by each point for measuring temperature of electricity measurer, a plurality of thermopairs that the second acting thermocouple plug array connects are arranged in second by each point for measuring temperature of electricity measurer, a plurality of thermopairs that three thermocouple plug array connects are arranged in the 3rd by each point for measuring temperature of electricity measurer, and a plurality of thermopairs that the 4th galvanic couple plug array connects are arranged in the 4th by each point for measuring temperature of electricity measurer.
Power converter group, digital electrical quantity instrument group, moisture recorder group, each commutation circuit and each electric voltage regulator are arranged in the test switch board, and the test terminal installing plate is arranged on away from test switch board place.
In conjunction with figure three each station circuit theory diagrams is described: L1, L2 are respectively two kinds of power supply phase lines; N1, N2 are respectively two kinds of zero-power lines; FU1, FU2 are fuse; QF1, QF2 are isolating switch, and KM1, KM2 are A.C. contactor, and ADJTM is an electric voltage regulator; QF3 is the band earth leakage circuit breaker; PJ is the electrical quantity instrument, and HL is the power supply output indicator, and PE1 and PE2 are protective ground.Can obtain two kinds of power supplys of 50HZ and 60HZ by the switching of KM1 and KM2, by the adjusting to ADJTM, can obtain required voltage among 0～300V, PJ can obtain various electrical quantitys by the electrical quantity instrument.Can reflect by HL whether the test terminal obtains the power supply input.
Figure is described in conjunction with four pairs of electric voltage regulator voltage up-downs of figure Principles of Regulation: L3 is the civil power phase line, N3 is the civil power zero line, FU4 is a fuse, QF5 is an isolating switch, SB1 is just changeing pushbutton switch, and S1 is for just changeing limit switch, and SB2 is the invert button switch, S2 is the counter-rotating limit switch, and ADJTM is an electric voltage regulator.
Be described in conjunction with five pairs of commutation circuit schematic diagrams of figure: L3 is the civil power phase line, and N3 is the civil power zero line, and QF4 is an isolating switch, and KAEM is an emergency stop switch, and SA is a switch, and KM1 is an A.C. contactor, and KM2 is an A.C. contactor, and FU3 is a fuse.
Output terminals A among the figure six is corresponding with the output terminals A among the figure three.
Claims (5)
1. washing machine safety and efficiency test macro, comprise power converter group and digital electrical quantity instrument group and moisture recorder group, described power converter group comprises first power converter and second source frequency converter, numeral electrical quantity instrument group comprises the first digital electrical quantity instrument, the second digital electrical quantity instrument, the 3rd digital electrical quantity instrument and the 4th digital electrical quantity instrument, the moisture recorder group comprises first moisture recorder, second moisture recorder, the 3rd moisture recorder and the 4th moisture recorder, described first power converter and described second source frequency converter are electrically connected with the city respectively, described first moisture recorder, second moisture recorder, the 3rd moisture recorder and the 4th moisture recorder are electrically connected with the city respectively, the described first digital electrical quantity instrument is connected by electricity measurer with first, the described second digital electrical quantity instrument is connected by electricity measurer with second, the 3rd digital electrical quantity instrument is connected by electricity measurer with the 3rd, the described the 4th digital electrical quantity instrument is connected by electricity measurer with the 4th, described first moisture recorder is connected by electricity measurer with first, described second moisture recorder is connected by electricity measurer with second, the 3rd moisture recorder is connected by electricity measurer with the 3rd, described the 4th moisture recorder is connected by electricity measurer with the 4th
It is characterized in that described first power converter respectively with first commutation circuit, second commutation circuit, the 3rd commutation circuit is connected with the 4th commutation circuit, described second source frequency converter respectively with first commutation circuit, second commutation circuit, the 3rd commutation circuit is connected with the 4th commutation circuit, described first commutation circuit is connected with the described first digital electrical quantity instrument by first electric voltage regulator, described second commutation circuit is connected with the described second digital electrical quantity instrument by second electric voltage regulator, described the 3rd commutation circuit is connected with the described the 3rd digital electrical quantity instrument by the 3rd electric voltage regulator, and described the 4th commutation circuit is connected with the described the 4th digital electrical quantity instrument by the 4th electric voltage regulator.
2. a kind of washing machine safety according to claim 1 and efficiency test macro, it is characterized in that it also includes the test terminal installing plate, described test terminal installing plate is provided with tested appliances power source socket group and thermopair interface array group, tested appliances power source socket group comprises the first tested appliances power source socket, the second tested appliances power source socket, the 3rd tested appliances power source socket and the 4th tested appliances power source socket, thermopair interface array group comprises the first thermopair interface array, the second thermopair interface array, three thermocouple interface array and the 4th thermopair interface array, the described first thermopair interface array comprises the first thermopair receptacle array and the first acting thermocouple plug array, the described second thermopair interface array comprises the second thermopair receptacle array and the second acting thermocouple plug array, described three thermocouple interface array comprises three thermocouple receptacle array and three thermocouple plug array, described the 4th thermopair interface array comprises the 4th thermopair receptacle array and the 4th acting thermocouple plug array, the described first acting thermocouple plug array cooperates with the described first thermopair receptacle array, the described second acting thermocouple plug array cooperates with the second thermopair receptacle array, described three thermocouple plug array cooperates with described three thermocouple receptacle array, described the 4th acting thermocouple plug array cooperates with the 4th thermopair receptacle array
The described first tested appliances power source socket is connected with the described first digital electrical quantity instrument, the described second tested appliances power source socket is connected with the described second digital electrical quantity instrument, the described the 3rd tested appliances power source socket is connected with the described the 3rd digital electrical quantity instrument, the described the 4th tested appliances power source socket is connected with the described the 4th digital electrical quantity instrument
The described first thermopair receptacle array is connected with first moisture recorder, the described second thermopair receptacle array is connected with second moisture recorder, described three thermocouple receptacle array is connected with the 3rd moisture recorder, described the 4th thermopair receptacle array is connected with the 4th moisture recorder
A plurality of thermopairs that the described first acting thermocouple plug array connects are arranged in first by each point for measuring temperature of electricity measurer, a plurality of thermopairs that the described second acting thermocouple plug array connects are arranged in second by each point for measuring temperature of electricity measurer, a plurality of thermopairs that described three thermocouple plug array connects are arranged in the 3rd by each point for measuring temperature of electricity measurer, and a plurality of thermopairs that described the 4th galvanic couple plug array connects are arranged in the 4th by each point for measuring temperature of electricity measurer.
3. a kind of washing machine safety according to claim 2 and efficiency test macro, it is characterized in that described power converter group, digital electrical quantity instrument group, moisture recorder group, each commutation circuit and each electric voltage regulator are arranged in the test switch board, described test terminal installing plate is arranged on away from described test switch board place.
4. a kind of washing machine safety according to claim 1 and efficiency test macro, the output voltage that it is characterized in that described first power converter is 220V, and frequency is 50HZ, and the output voltage of described second source frequency converter is 220V, and frequency is 60HZ.
5. a kind of washing machine safety according to claim 2 and efficiency test macro is characterized in that the thermopair that the described first thermopair receptacle array, the second thermopair receptacle array, three thermocouple receptacle array are connected with the 4th thermopair receptacle array all is 20～40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009100952437A CN101477165B (en) | 2009-01-04 | 2009-01-04 | Integrated test system for security and efficiency of washing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100952437A CN101477165B (en) | 2009-01-04 | 2009-01-04 | Integrated test system for security and efficiency of washing machine |
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| CN101477165A CN101477165A (en) | 2009-07-08 |
| CN101477165B true CN101477165B (en) | 2010-12-08 |
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| CN2009100952437A Expired - Fee Related CN101477165B (en) | 2009-01-04 | 2009-01-04 | Integrated test system for security and efficiency of washing machine |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103558045B (en) * | 2013-11-05 | 2016-02-10 | 安徽中家智锐科技有限公司 | Twin-tub pulsator washing machine failure-free operation test device |
| CN108828371A (en) * | 2018-07-23 | 2018-11-16 | 山东省计量科学研究院 | Household electric appliance safety is test bed |
| CN110596494A (en) * | 2019-09-25 | 2019-12-20 | 中国标准化研究院 | Automatic detection device and detection method for electrical appliance safety |
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| US3648819A (en) * | 1968-03-29 | 1972-03-14 | Scans Associates Inc | Industrial system and method |
| US3758857A (en) * | 1971-12-23 | 1973-09-11 | A D Smith Corp | Automatic testing apparatus |
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2009
- 2009-01-04 CN CN2009100952437A patent/CN101477165B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3648819A (en) * | 1968-03-29 | 1972-03-14 | Scans Associates Inc | Industrial system and method |
| US3758857A (en) * | 1971-12-23 | 1973-09-11 | A D Smith Corp | Automatic testing apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 郑常宝等.洗衣机电气参数的微机测试系统.《机电工程》.1999,(第3期),17-19. * |
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