CN104459527A - Automatic tester for magnetic steel temperature limiter and testing method thereof - Google Patents
Automatic tester for magnetic steel temperature limiter and testing method thereof Download PDFInfo
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- CN104459527A CN104459527A CN201410704904.2A CN201410704904A CN104459527A CN 104459527 A CN104459527 A CN 104459527A CN 201410704904 A CN201410704904 A CN 201410704904A CN 104459527 A CN104459527 A CN 104459527A
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Abstract
The invention provides an automatic tester for a magnetic steel temperature limiter and a testing method of the tester. The automatic tester meets the testing requirement of the magnetic steel temperature limiter. The automatic tester for the magnetic steel temperature limiter comprises a box. A heating unit and a temperature sensor are arranged in the box. A control unit is arranged on the box. The control unit is electrically connected with the heating unit and the temperature sensor. The control unit is provided with an input module used for setting the upper limit and the lower limit of the temperature. The control unit is connected with a display unit used for displaying the upper limit and the lower limit of the temperature and the temperature measured by the temperature sensor. The testing method of the automatic tester for the automatic steel temperature limiter comprises the following steps that A, the magnetic steel temperature limiter to be tested is placed into the box, and permanent magnetic steel and temperature sensing magnetic steel of the magnetic steel temperature limiter to be tested are attracted; the input module is utilized for setting the upper limit temperature and the lower limit temperature, and then the heating unit is started; B, the temperature in the box and the state of the permanent magnetic steel and temperature sensing magnetic steel of the magnetic steel temperature limiter are observed to judge whether the magnetic steel temperature limiter is qualified.
Description
Technical field
The invention belongs to Electronic Testing Technology field, be related specifically to testing apparatus and the method for testing thereof of magnetic steel temperature limiter.
Background technology
Magnetic steel temperature limiter is also known as magnetic temperature limiter, it is the temperature switch losing magnetic conductivity at a certain temperature according to temperature sensitive ferrite and make, generally be made up of soft magnet (sensing magnet steel), rigid magnet (permanent magnet), take-off spring, lever and shift knob etc., the auto-breaking being mainly used in the household electrical appliance such as electric cooker, electric frying pan, gas rice cooker controls, its operating temperature can be selected arbitrarily between 50 DEG C ~ 195 DEG C, operation precision ± 3 DEG C.Can say, can the performance of magnetic steel temperature limiter be directly connected to electric cooker and normally work, and is therefore necessary to carry out Performance Detection to it, to ensure the reliability of product work.
The detection of current magnetic steel temperature limiter is normally put into this accessory the electric dry oven that oneself is in predetermined temperature and is detected, but owing to needing ceiling temperature and the lower limit temperature of testing magnetic steel temperature limiter, therefore twice operation to be gone through, and be inconvenient to the action observing magnetic steel temperature limiter, the error of test result is comparatively large, can not meet the requirement of modern test far away.
Summary of the invention
The object of the invention is to propose the high magnetic steel temperature limiter auto testing instrument of a kind of automaticity and method of testing thereof, to meet the test request to magnetic steel temperature limiter.
Magnetic steel temperature limiter auto testing instrument of the present invention comprises a casing, heating unit and temperature sensor is provided with in described casing, described casing is also provided with control module, described control module is electrically connected with heating unit, temperature sensor respectively, and described control module is provided with the load module for set temperature upper and lower limit; Described control module is also connected with the display unit for displays temperature upper and lower limit and temperature sensor measured temperature.
The method of testing of above-mentioned magnetic steel temperature limiter auto testing instrument comprises the steps:
A: magnetic steel temperature limiter to be tested is put into casing, and the permanent-magnet steel and the sensing magnet steel adhesive that make magnetic steel temperature limiter to be tested; Utilize load module to arrange ceiling temperature and lower limit temperature, then start heating unit;
B: observe temperature and the permanent-magnet steel of magnetic steel temperature limiter and the state of sensing magnet steel in casing, if the permanent-magnet steel of magnetic steel temperature limiter and sensing magnet steel temperature in casing is separated lower than during lower limit temperature, then illustrate that magnetic steel temperature limiter is defective; If the permanent-magnet steel of magnetic steel temperature limiter and sensing magnet steel are separated when temperature is between lower limit temperature and ceiling temperature in casing, then illustrate that magnetic steel temperature limiter is qualified; If the permanent-magnet steel of magnetic steel temperature limiter and sensing magnet steel temperature in casing is separated higher than during ceiling temperature, then illustrate that magnetic steel temperature limiter is defective.
By heating unit is put into casing, make the temperature in casing be in the state of linear change, whether qualifiedly product can be tested out easily, improve the comfort level of test.
Further, be provided with the test bracket for placing magnetic steel temperature limiter in described casing, described test bracket comprises the spacing recess of lever and top seal, bottom opening, and fulcrum and the spacing recess of described lever are all fixed with casing; One end of described lever is provided with the connecting portion suitable with the driver blade of magnetic steel temperature limiter to be measured, and described connecting portion is in the below of spacing recess, and the other end of lever is press-side; Described casing is provided with static contact and flexible movable contact spring in the below of lever, the end of described movable contact spring just to below lever the insulating trip fixed, described static contact is connected with direct supply, indicating module, movable contact spring successively by wire, forms the instruction loop that can be controlled break-make by lever.Specifically, described indicating module is the pilot lamp or the hummer that are arranged at tank surface.
In described step A, magnetic steel temperature limiter to be tested is put into from the bottom to top the spacing recess of test bracket, the end face of magnetic steel temperature limiter and spacing recess is offseted, and be connected with the connecting portion of lever by the driver blade of magnetic steel temperature limiter, and then make permanent-magnet steel and the sensing magnet steel adhesive of magnetic steel temperature limiter by the press section of presses lever; In described step B, judge that the permanent-magnet steel of magnetic steel temperature limiter and sensing magnet steel are in adhesive or released state by the state of observing indicating module.So just without the need to the state of the permanent-magnet steel and sensing magnet steel of directly observing magnetic steel temperature limiter, but utilize indicating module to indicate, observe convenient and accurate.
Further, described heating unit has the electrothermal module of two or more parallel connection, and described each electrothermal module is equipped with independently gauge tap, and described each gauge tap is all electrically connected with control module.In described step A, when in casing, temperature reaches lower limit temperature, control module controls heating unit and reduces Power operation.So not only can accelerate programming rate in the temperature of casing lower than during lower limit temperature, save test required time, and lower limit temperature can be reached in the temperature of casing and slow down programming rate, make test more accurate.
In described step A, when in casing, temperature reaches ceiling temperature, control module closes heating unit, completes test, reduces energy dissipation, guarantees safety.
Further, described casing is provided with transparent windows, to facilitate observation.
Further, described casing is thermal-insulating body, to reduce heat loss, thus saves the energy.
Magnetic steel temperature limiter auto testing instrument structure of the present invention is simple, and convenient test, accurately can detect the trigger temperatures of magnetic steel temperature limiter, reject underproof product, have good practicality and commercial value in certain error range.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of magnetic steel temperature limiter auto testing instrument of the present invention.
Fig. 2 be test bracket of the present invention with magnetic steel temperature limiter coordinate schematic diagram.
Fig. 3 is the schematic diagram of heating unit of the present invention.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the effect and principle of work etc. of the specific embodiment of the present invention as the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part are described in further detail.
Embodiment 1:
As shown in Figure 1, the magnetic steel temperature limiter auto testing instrument of the present embodiment comprises one and is incubated and the casing 1 being provided with transparent windows 13, heating unit 2 is provided with and temperature sensor 3(can adopt thermopair) in described casing 1, the outside of described casing 1 is provided with control module 4, described control module 4 is electrically connected with heating unit 2, temperature sensor 3 respectively, and described control module 4 is provided with the load module 5 for set temperature upper and lower limit; Described control module 4 is also connected with the display unit 6 for displays temperature upper and lower limit and temperature sensor 3 measured temperature.
As shown in Figure 2, be provided with the test bracket for placing magnetic steel temperature limiter in described casing 1, described test bracket comprises the spacing recess 8 of lever 7 and top seal, bottom opening, and the fulcrum of described lever 7 and spacing recess 8 are all fixed with casing 1; One end of described lever 7 is provided with the connecting portion 71 suitable with the driver blade of magnetic steel temperature limiter to be measured, and described connecting portion 71 is positioned at the below of spacing recess 8, and the other end of lever 7 is press-side; Described casing 1 is provided with static contact 9 and flexible movable contact spring 10 in the below of lever 7, the end of described movable contact spring 10 just to below lever 7 the insulating trip 72 fixed, described static contact 9 is connected with direct supply 11, indicating module 12, movable contact spring 10 successively by wire, forms the instruction loop that can be controlled break-make by lever 7.Specifically, described indicating module 12 is for being arranged at pilot lamp or the hummer on casing 1 surface.
As shown in Figure 3, described heating unit 2 has the electrothermal module 21 of two or more parallel connection, and described each electrothermal module 21 is equipped with independently gauge tap 22, and described each gauge tap 22 is all electrically connected with control module 4.
The method of testing of above-mentioned magnetic steel temperature limiter auto testing instrument comprises the steps:
A: the spacing recess 8 magnetic steel temperature limiter 20 to be tested being put into from the bottom to top test bracket, magnetic steel temperature limiter 20 is offseted with the end face of spacing recess 8, and be connected with the connecting portion 71 of lever 7 by the driver blade 21 of magnetic steel temperature limiter 20, and then make permanent-magnet steel and the sensing magnet steel adhesive of magnetic steel temperature limiter 20 by the press section of presses lever 7; Utilize load module 5 to arrange ceiling temperature and lower limit temperature, then start heating unit 2;
B: observe temperature in casing 1, and judge that the permanent-magnet steel of magnetic steel temperature limiter 20 and sensing magnet steel are in adhesive or released state by the state of observing indicating module 12, if the permanent-magnet steel of magnetic steel temperature limiter 20 and sensing magnet steel temperature in casing 1 is separated lower than during lower limit temperature, then illustrate that magnetic steel temperature limiter 20 is defective; If the permanent-magnet steel of magnetic steel temperature limiter 20 and sensing magnet steel are separated when temperature is between lower limit temperature and ceiling temperature in casing 1, then illustrate that magnetic steel temperature limiter 20 is qualified; If the permanent-magnet steel of magnetic steel temperature limiter 20 and sensing magnet steel temperature in casing 1 is separated higher than during ceiling temperature, then illustrate that magnetic steel temperature limiter 20 is defective.
In described step A, when in casing 1, temperature reaches lower limit temperature, control module 4, by disconnecting one or more gauge tap 22, controls heating unit 2 and reduces Power operation.So not only can accelerate programming rate in the temperature of casing 1 lower than during lower limit temperature, save test required time, and lower limit temperature can be reached in the temperature of casing 1 and slow down programming rate, make test more accurate.
In described step A, when in casing 1, temperature reaches ceiling temperature, control module 4 closes heating unit 2, completes test, to reduce energy dissipation, guarantees safety.
Claims (10)
1. a magnetic steel temperature limiter auto testing instrument, it is characterized in that comprising a casing, heating unit and temperature sensor is provided with in described casing, described casing is also provided with control module, described control module is electrically connected with heating unit, temperature sensor respectively, and described control module is provided with the load module for set temperature upper and lower limit; Described control module is also connected with the display unit for displays temperature upper and lower limit and temperature sensor measured temperature.
2. magnetic steel temperature limiter auto testing instrument according to claim 1, it is characterized in that the test bracket be provided with in described casing for placing magnetic steel temperature limiter, described test bracket comprises the spacing recess of lever and top seal, bottom opening, and fulcrum and the spacing recess of described lever are all fixed with casing; One end of described lever is provided with the connecting portion suitable with the driver blade of magnetic steel temperature limiter to be measured, and described connecting portion is in the below of spacing recess, and the other end of lever is press-side; Described casing is provided with static contact and flexible movable contact spring in the below of lever, the end of described movable contact spring just to below lever the insulating trip fixed, described static contact is connected with direct supply, indicating module, movable contact spring successively by wire, forms the instruction loop that can be controlled break-make by lever.
3. magnetic steel temperature limiter auto testing instrument according to claim 2, is characterized in that described indicating module is the pilot lamp or the hummer that are arranged at tank surface.
4. the magnetic steel temperature limiter auto testing instrument according to claim 1 or 2 or 3, it is characterized in that described heating unit has the electrothermal module of two or more parallel connection, described each electrothermal module is equipped with independently gauge tap, and described each gauge tap is all electrically connected with control module.
5. magnetic steel temperature limiter auto testing instrument according to claim 1, is characterized in that described casing is provided with transparent windows.
6. magnetic steel temperature limiter auto testing instrument according to claim 1, is characterized in that described casing is thermal-insulating body.
7. the method for testing of magnetic steel temperature limiter auto testing instrument according to claim 1, is characterized in that comprising the steps:
A: magnetic steel temperature limiter to be tested is put into casing, and the permanent-magnet steel and the sensing magnet steel adhesive that make magnetic steel temperature limiter to be tested; Utilize load module to arrange ceiling temperature and lower limit temperature, then start heating unit;
B: observe temperature and the permanent-magnet steel of magnetic steel temperature limiter and the state of sensing magnet steel in casing, if the permanent-magnet steel of magnetic steel temperature limiter and sensing magnet steel temperature in casing is separated lower than during lower limit temperature, then illustrate that magnetic steel temperature limiter is defective; If the permanent-magnet steel of magnetic steel temperature limiter and sensing magnet steel are separated when temperature is between lower limit temperature and ceiling temperature in casing, then illustrate that magnetic steel temperature limiter is qualified; If the permanent-magnet steel of magnetic steel temperature limiter and sensing magnet steel temperature in casing is separated higher than during ceiling temperature, then illustrate that magnetic steel temperature limiter is defective.
8. the method for testing of magnetic steel temperature limiter auto testing instrument according to claim 7, it is characterized in that in described step A, magnetic steel temperature limiter to be tested is put into from the bottom to top the spacing recess of test bracket, the end face of magnetic steel temperature limiter and spacing recess is offseted, and be connected with the connecting portion of lever by the driver blade of magnetic steel temperature limiter, and then make permanent-magnet steel and the sensing magnet steel adhesive of magnetic steel temperature limiter by the press section of presses lever; In described step B, judge that the permanent-magnet steel of magnetic steel temperature limiter and sensing magnet steel are in adhesive or released state by the state of observing indicating module.
9. the method for testing of magnetic steel temperature limiter auto testing instrument according to claim 7, is characterized in that in described step A, and when in casing, temperature reaches lower limit temperature, control module controls heating unit and reduces Power operation.
10. the method for testing of magnetic steel temperature limiter auto testing instrument according to claim 7, is characterized in that in described step A, and when in casing, temperature reaches ceiling temperature, control module closes heating unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410704904.2A CN104459527A (en) | 2014-11-28 | 2014-11-28 | Automatic tester for magnetic steel temperature limiter and testing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410704904.2A CN104459527A (en) | 2014-11-28 | 2014-11-28 | Automatic tester for magnetic steel temperature limiter and testing method thereof |
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| CN104459527A true CN104459527A (en) | 2015-03-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104880667A (en) * | 2015-05-22 | 2015-09-02 | 广东省茂名市质量计量监督检测所 | Mobile internet-based magnetic steel temperature limiter remote three-level monitor public detection system |
| CN111474917A (en) * | 2020-04-16 | 2020-07-31 | 佛山市川东磁电股份有限公司 | Temperature limiter test board |
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Cited By (2)
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| CN104880667A (en) * | 2015-05-22 | 2015-09-02 | 广东省茂名市质量计量监督检测所 | Mobile internet-based magnetic steel temperature limiter remote three-level monitor public detection system |
| CN111474917A (en) * | 2020-04-16 | 2020-07-31 | 佛山市川东磁电股份有限公司 | Temperature limiter test board |
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Application publication date: 20150325 |