CN110703084A - Temperature characteristic detection method of thermosensitive switch - Google Patents
Temperature characteristic detection method of thermosensitive switch Download PDFInfo
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- CN110703084A CN110703084A CN201911087210.8A CN201911087210A CN110703084A CN 110703084 A CN110703084 A CN 110703084A CN 201911087210 A CN201911087210 A CN 201911087210A CN 110703084 A CN110703084 A CN 110703084A
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- temperature
- thermosensitive
- oil groove
- switches
- oil
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/0062—Testing or measuring non-electrical properties of switches, e.g. contact velocity
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Thermally Actuated Switches (AREA)
Abstract
The invention discloses a temperature characteristic detection method of a thermal switch, which comprises the steps of arranging five oil grooves, namely an action upper limit oil groove, a reset lower limit oil groove and a detection oil groove, wherein the temperature of oil in the detection oil groove is 15-25 ℃ lower than the action lower limit temperature; placing the thermal switch into an oil groove with the lower limit of action, and keeping the temperature for 5-8 minutes; placing the qualified thermosensitive switches into an oil detection groove, disconnecting the testing contacts into a first batch of qualified thermosensitive switches, placing the qualified thermosensitive switches into an upper limit action oil groove, and keeping the temperature for 5-8 minutes; taking out and putting into an upper limit resetting oil groove, and keeping the temperature for 5-8 minutes; taking out the thermal switch and putting the thermal switch into a detection oil groove, disconnecting the test connection points into a second batch of qualified thermal switches, putting the second batch of qualified thermal switches into a lower limit reset oil groove, keeping the temperature for 5-8 minutes, touching two binding posts of the thermal switch by adopting a conductive probe, closing the test connection points, detecting the temperature characteristics, and judging that the detection is completely qualified, and disconnecting the connection points into disqualification. The invention has high detection reliability and low labor intensity of operators.
Description
Technical Field
The invention relates to a product quality detection method of a thermosensitive switch, in particular to a temperature characteristic detection method of the thermosensitive switch.
Background
The thermal switch comprises a shell with an opening at the bottom, a bottom plate arranged at the bottom of the shell, a bimetallic strip and other components arranged in a sealed cavity formed by the shell and the bottom plate, wherein two binding posts are usually arranged on the bottom plate. After the thermal switch is electrified by the wiring terminal, when the overcurrent and overtemperature are reached, the thermal switch acts to disconnect the contact so as to cut off the power supply, and after the current temperature returns to normal, the thermal switch resets to close the contact so as to switch on the power supply. The thermal switch is provided with an action temperature of 100-120 ℃, 100 ℃ is the action lower limit temperature of the thermal switch, 120 ℃ is the action upper limit temperature of the thermal switch, meanwhile, the thermal switch is also provided with a reset temperature of 60-70 ℃, 60 ℃ is the reset lower limit temperature of the thermal switch, 70 ℃ is the reset upper limit temperature of the thermal switch, the thermal switch is powered off when the action temperature is 100-120 ℃, and is powered on when the reset temperature is 60-70 ℃. The thermal switch is usually installed inside an electrical device such as a compressor, and protects the electrical device.
The thermal switch is used as an electrical appliance accessory with the characteristics of over-temperature protection and automatic reset during cooling, the over-temperature protection and cooling reset capabilities are the most basic characteristics of the switch, and screening of the over-temperature protection and the cooling reset is particularly important in the production and manufacturing process of the thermal switch. The existing temperature characteristic detection method of the thermosensitive switch is to set four oil tanks, namely an action lower limit oil tank, an action upper limit oil tank, a reset lower limit oil tank and a reset upper limit oil tank, wherein a conductive probe is adopted in each oil tank to touch two binding posts of the thermosensitive switch, and whether the thermosensitive switch meets the requirements is judged by detecting the on-off states of the two binding posts. The detection method has the following two defects: on one hand, when the conductive probe is adopted in each oil groove for detection, the thermosensitive switch is in an environment close to or equal to the action temperature or the reset temperature of the thermosensitive switch, and any slight touch of the conductive probe can lead the switch to act in advance or reset, so that misjudgment is caused, and the detection reliability is greatly influenced; on the other hand, because four times of detection is adopted in four oil grooves, not only the labor intensity of operators is large, but also the number of times of touch detection of the conductive probes is large, and the detection reliability is further reduced.
Disclosure of Invention
The invention aims to provide a temperature characteristic detection method of a thermosensitive switch, which can reduce the labor intensity of operators and greatly improve the detection reliability.
In order to solve the technical problem, the invention adopts a method for detecting the temperature characteristics of the thermosensitive switches, wherein a plurality of thermosensitive switches are simultaneously detected, and the method comprises the following steps:
the first step is as follows: setting five oil grooves which are respectively an action lower limit oil groove, an action upper limit oil groove, a reset lower limit oil groove, a reset upper limit oil groove and a detection oil groove, wherein the oil temperature in the action lower limit oil groove is equal to the action lower limit temperature of the thermosensitive switch, the oil temperature in the action upper limit oil groove is equal to the action upper limit temperature of the thermosensitive switch, the oil temperature in the reset lower limit oil groove is equal to the reset lower limit temperature of the thermosensitive switch, the oil temperature in the reset upper limit oil groove is equal to the reset upper limit temperature of the thermosensitive switch, and the oil temperature in the detection oil groove is 15-25 ℃ lower than the action lower limit temperature of the thermosensitive switch;
the second step is that: placing all the thermal switches into the action lower limit oil groove, and keeping the temperature for 5-8 minutes;
the third step: taking out the thermosensitive switches with constant temperature in the oil groove with the lower action limit, putting the thermosensitive switches into the detection oil groove, touching two binding posts of each thermosensitive switch by adopting a conductive probe, and testing that the contact of the thermosensitive switches is disconnected into a first group of qualified thermosensitive switches and the contact is closed into an unqualified thermosensitive switch;
the fourth step: placing the first batch of qualified thermosensitive switches obtained in the third step into the action upper limit oil groove, and keeping the temperature for 5-8 minutes;
the fifth step: taking out the first qualified thermosensitive switches with constant temperature in the action upper limit oil groove, directly putting the first qualified thermosensitive switches into the reset upper limit oil groove, and keeping the temperature for 5-8 minutes;
and a sixth step: taking out the first qualified thermosensitive switches with constant temperature in the upper reset limit oil tank, putting the first qualified thermosensitive switches into the detection oil tank, touching two binding posts of each thermosensitive switch by adopting a conductive probe, and testing whether the contact points of the thermosensitive switches are disconnected into second qualified thermosensitive switches or not and whether the contact points are closed into unqualified thermosensitive switches;
the seventh step: and (3) placing the second batch of qualified thermal switches obtained in the sixth step into the lower limit oil resetting groove, keeping the temperature for 5-8 minutes, touching two binding posts of each thermal switch by adopting a conductive probe, testing the connection point closure of the thermal switches to detect all qualified thermal switches according to the temperature characteristics, and disconnecting the connection point to obtain an unqualified thermal switch.
In a preferred embodiment of the present invention, the oil in the oil tank is silicone oil, and the temperature of the oil in the detection oil tank is 20 ℃ lower than the lower limit temperature of the operation of the thermal switch.
After the method is adopted, the invention has the following beneficial effects:
the temperature of the oil in the oil groove is detected to be far lower than the action lower limit temperature of the thermal switch and higher than the reset temperature of the thermal switch, and the thermal switch is not mistakenly judged or reset when being touched by the conductive probe in the oil groove detection environment, so that the misjudgment rate is greatly reduced, and the product detection reliability is greatly improved.
The invention only adopts three times of detection, abandons four times of detection adopted in the prior art, reduces the detection times, not only reduces the labor intensity of operators, but also reduces the detection touch times of the conductive probe and the thermosensitive switch, and further improves the detection reliability of products.
The invention is provided with the oil detection groove, so that the temperature characteristic detection environment of the thermal switch is more reasonable, and the problem of erroneous judgment caused by the fact that the switch is moved in advance or reset possibly due to any slight touch of the conductive probe when the thermal switch is in the environment close to the action or reset temperature of the thermal switch is solved.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a five sump configuration according to the present invention.
Fig. 2 is a schematic top view of fig. 1.
Fig. 3 is a schematic view of a structure of the thermal switch of the present invention.
Detailed Description
Referring to fig. 1 to 3, in order to improve the reliability of detecting the temperature characteristic of the thermal switch a, the present invention adopts a method for detecting the temperature characteristic of the thermal switch a, wherein a plurality of, for example, 100, thermal switches a are simultaneously detected, and the method specifically includes the following steps:
the first step is as follows: the method comprises the following steps of arranging five oil grooves, namely an action lower limit oil groove 1, an action upper limit oil groove 2, a reset lower limit oil groove 3, a reset upper limit oil groove 4 and a detection oil groove 5, wherein oil in the oil grooves is preferably silicone oil, the temperature of the oil in the action lower limit oil groove 1 is equal to the action lower limit temperature of a thermal switch, the temperature of the oil in the action upper limit oil groove 2 is equal to the action upper limit temperature of the thermal switch, the temperature of the oil in the reset lower limit oil groove 3 is equal to the reset lower limit temperature of the thermal switch, the temperature of the oil in the reset upper limit oil groove 4 is equal to the reset upper limit temperature of the thermal switch, the temperature of the oil in the detection oil groove 5 is 15-25 ℃ lower than the action lower limit temperature of the thermal switch, and the temperature;
the second step is that: putting all the thermal switches A into the action lower limit oil groove 1, not testing, and keeping the temperature for 5-8 minutes;
the third step: taking out the thermosensitive switches A with constant temperature in the action lower limit oil groove 1, putting the thermosensitive switches A into the detection oil groove 5, touching two binding posts of each thermosensitive switch A by adopting a conductive probe, and testing the thermosensitive switch to be disconnected into a first group of qualified thermosensitive switches, namely the thermosensitive switches with qualified action lower limit temperature, wherein the connection points are closed into unqualified thermosensitive switches;
the fourth step: placing the first batch of qualified thermosensitive switches obtained in the third step into the action upper limit oil tank 2, and keeping the temperature for 5-8 minutes without testing;
the fifth step: taking out the first qualified thermosensitive switches with constant temperature in the action upper limit oil groove 2, directly putting the qualified thermosensitive switches into the reset upper limit oil groove 4, and keeping the temperature for 5-8 minutes without testing;
and a sixth step: taking out the first qualified thermosensitive switch after the upper limit resetting oil tank 4 is kept at a constant temperature, putting the first qualified thermosensitive switch into the detection oil tank 5, touching two binding posts of each thermosensitive switch A by adopting a conductive probe, disconnecting the contact of the thermosensitive switch to be tested into a second qualified thermosensitive switch, and closing the contact to be an unqualified thermosensitive switch, and detecting the thermosensitive switch with unqualified action upper limit temperature and the thermosensitive switch with unqualified resetting upper limit temperature in one step;
the seventh step: and (3) placing the second batch of qualified thermosensitive switches obtained in the sixth step into the lower limit resetting oil tank 3, keeping the temperature for 5-8 minutes, then touching two binding posts of each thermosensitive switch A by adopting a conductive probe, testing the closing of the contact points of the thermosensitive switches, detecting all qualified thermosensitive switches according to the temperature characteristics, and disconnecting the contact points to obtain unqualified thermosensitive switches.
Through trial, the temperature characteristic detection method has high detection reliability of the thermal switch, greatly reduces the misjudgment rate compared with the prior art, and has low labor intensity of operators and good effect.
Claims (2)
1. A temperature characteristic detection method of a thermosensitive switch, wherein a plurality of thermosensitive switches are simultaneously detected, is characterized by comprising the following steps:
the first step is as follows: the method comprises the following steps of arranging five oil grooves, namely an action lower limit oil groove (1), an action upper limit oil groove (2), a reset lower limit oil groove (3), a reset upper limit oil groove (4) and a detection oil groove (5), wherein the oil temperature in the action lower limit oil groove (1) is equal to the action lower limit temperature of a thermosensitive switch, the oil temperature in the action upper limit oil groove (2) is equal to the action upper limit temperature of the thermosensitive switch, the oil temperature in the reset lower limit oil groove (3) is equal to the reset lower limit temperature of the thermosensitive switch, the oil temperature in the reset upper limit oil groove (4) is equal to the reset upper limit temperature of the thermosensitive switch, and the oil temperature in the detection oil groove (5) is 15-25 ℃ lower than the action lower limit;
the second step is that: placing all the thermal switches into the action lower limit oil groove (1), and keeping the temperature for 5-8 minutes;
the third step: taking out the thermosensitive switches with constant temperature in the action lower limit oil groove (1), putting the thermosensitive switches into the detection oil groove (5), touching two binding posts of each thermosensitive switch by adopting a conductive probe, and testing that the contact of the thermosensitive switches is disconnected into a first batch of qualified thermosensitive switches and the contact is closed into an unqualified thermosensitive switch;
the fourth step: placing the first batch of qualified thermosensitive switches obtained in the third step into the action upper limit oil tank (2), and keeping the temperature for 5-8 minutes;
the fifth step: taking out the first qualified thermosensitive switches with constant temperature in the action upper limit oil groove (2), directly putting the first qualified thermosensitive switches into the reset upper limit oil groove (4), and keeping the temperature for 5-8 minutes;
and a sixth step: taking out the first batch of qualified thermosensitive switches with constant temperature in the upper limit resetting oil groove (4), putting the first batch of qualified thermosensitive switches into the detection oil groove (5), touching two binding posts of each thermosensitive switch by adopting a conductive probe, and disconnecting the contact of the testing thermosensitive switch into a second batch of qualified thermosensitive switches and disconnecting the contact into an unqualified thermosensitive switch;
the seventh step: and (3) placing the second batch of qualified thermosensitive switches obtained in the sixth step into the lower limit resetting oil tank (3), keeping the temperature for 5-8 minutes, touching two binding posts of each thermosensitive switch by adopting a conductive probe, testing the closing of the contact points of the thermosensitive switches, detecting all qualified thermosensitive switches according to the temperature characteristics, and disconnecting the contact points to obtain unqualified thermosensitive switches.
2. The method of detecting the temperature characteristic of a thermal switch according to claim 1, wherein: the oil in the oil groove is silicon oil, and the temperature of the oil in the detection oil groove (5) is 20 ℃ lower than the lower limit temperature of the action of the thermal switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911087210.8A CN110703084A (en) | 2019-11-08 | 2019-11-08 | Temperature characteristic detection method of thermosensitive switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911087210.8A CN110703084A (en) | 2019-11-08 | 2019-11-08 | Temperature characteristic detection method of thermosensitive switch |
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| CN110703084A true CN110703084A (en) | 2020-01-17 |
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| CN201911087210.8A Pending CN110703084A (en) | 2019-11-08 | 2019-11-08 | Temperature characteristic detection method of thermosensitive switch |
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| WO1997032328A1 (en) * | 1996-03-01 | 1997-09-04 | Portage Electric Products, Inc. | Dual calibration thermostatic switch having a wide operating range |
| CN1539563A (en) * | 2003-10-27 | 2004-10-27 | 陈伟民 | Wires for automatic sorting temperatures in jump type thermostat |
| US20060061448A1 (en) * | 2004-09-22 | 2006-03-23 | Fuji Electronics Industries Co., Ltd. | Heat-sensitive switch and a heat-sensitive switch assembling method |
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| CN105841846A (en) * | 2016-05-26 | 2016-08-10 | 句容市博远电子有限公司 | NTC heat-sensitive chip testing method |
| CN106623000A (en) * | 2016-12-20 | 2017-05-10 | 陈关莲 | Automatic detection equipment for bimetallic strip |
| CN108226765A (en) * | 2016-12-09 | 2018-06-29 | 丹东科亮科技有限公司 | Thermoswitch automatic inspection line body |
| CN109115375A (en) * | 2018-10-22 | 2019-01-01 | 中国振华集团云科电子有限公司 | Screening method and screening system of thermistor |
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2019
- 2019-11-08 CN CN201911087210.8A patent/CN110703084A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4258325A (en) * | 1979-05-21 | 1981-03-24 | Therm-O-Disc, Incorporated | Thermostat and method of testing thereof |
| WO1997032328A1 (en) * | 1996-03-01 | 1997-09-04 | Portage Electric Products, Inc. | Dual calibration thermostatic switch having a wide operating range |
| CN1539563A (en) * | 2003-10-27 | 2004-10-27 | 陈伟民 | Wires for automatic sorting temperatures in jump type thermostat |
| US20060061448A1 (en) * | 2004-09-22 | 2006-03-23 | Fuji Electronics Industries Co., Ltd. | Heat-sensitive switch and a heat-sensitive switch assembling method |
| CN201117051Y (en) * | 2007-11-08 | 2008-09-17 | 武汉钢铁(集团)公司 | Bearing overheating monitoring alarming device |
| CN101811622A (en) * | 2010-03-30 | 2010-08-25 | 南京时恒电子科技有限公司 | Full-automatic detection graded-clamping conveyor for thermistors |
| CN103418552A (en) * | 2012-05-18 | 2013-12-04 | 旭程电子(深圳)有限公司 | Butterfly-shaped dual-metal-sheet automatic sorting machine |
| CN103176123A (en) * | 2013-02-01 | 2013-06-26 | 河海大学 | FPGA-based (field programmable gate array-based) parallel detection method for thermal protectors in batches |
| CN204536423U (en) * | 2015-03-28 | 2015-08-05 | 合肥晶浦传感科技有限公司 | A kind of heat sensitive chip high-accuracy and constant warm air test machine |
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Inventor after: Kuang Jingyin Inventor after: Jia Xiangdong Inventor after: Ni Longhua Inventor before: Zhou Yuanqin |
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