CN204359906U - Magnetic steel temperature limiter auto testing instrument - Google Patents
Magnetic steel temperature limiter auto testing instrument Download PDFInfo
- Publication number
- CN204359906U CN204359906U CN201420731403.9U CN201420731403U CN204359906U CN 204359906 U CN204359906 U CN 204359906U CN 201420731403 U CN201420731403 U CN 201420731403U CN 204359906 U CN204359906 U CN 204359906U
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- magnetic steel
- temperature
- casing
- temperature limiter
- steel temperature
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Abstract
The utility model proposes the magnetic steel temperature limiter auto testing instrument that a kind of automaticity is high, to meet the test request to magnetic steel temperature limiter.This magnetic steel temperature limiter auto testing instrument comprises a casing, heating unit and temperature sensor is provided with in casing, casing is also provided with control module, and 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; 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 is as follows: A: magnetic steel temperature limiter to be tested is put into casing, and makes permanent-magnet steel and the sensing magnet steel adhesive of 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, judge that whether magnetic steel temperature limiter is qualified.
Description
Technical field
The utility model belongs to Electronic Testing Technology field, is 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 purpose of this utility model proposes the high magnetic steel temperature limiter auto testing instrument of a kind of automaticity, to meet the test request to magnetic steel temperature limiter.
Magnetic steel temperature limiter auto testing instrument of the present utility model 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 utility model 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 utility model.
Fig. 2 be test bracket of the present utility model with magnetic steel temperature limiter coordinate schematic diagram.
Fig. 3 is the schematic diagram of heating unit of the present utility model.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the effect and principle of work etc. of embodiment of the present utility model 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 (5)
1. a magnetic steel temperature limiter auto testing instrument, comprise 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; 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.
2. magnetic steel temperature limiter auto testing instrument according to claim 1, is characterized in that described indicating module is the pilot lamp or the hummer that are arranged at tank surface.
3. magnetic steel temperature limiter auto testing instrument according to claim 1, 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.
4. magnetic steel temperature limiter auto testing instrument according to claim 1, is characterized in that described casing is provided with transparent windows.
5. magnetic steel temperature limiter auto testing instrument according to claim 1, is characterized in that described casing is thermal-insulating body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420731403.9U CN204359906U (en) | 2014-11-28 | 2014-11-28 | Magnetic steel temperature limiter auto testing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420731403.9U CN204359906U (en) | 2014-11-28 | 2014-11-28 | Magnetic steel temperature limiter auto testing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204359906U true CN204359906U (en) | 2015-05-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420731403.9U Expired - Fee Related CN204359906U (en) | 2014-11-28 | 2014-11-28 | Magnetic steel temperature limiter auto testing instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204359906U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459527A (en) * | 2014-11-28 | 2015-03-25 | 广东华田电器有限公司 | Automatic tester for magnetic steel temperature limiter and testing method thereof |
-
2014
- 2014-11-28 CN CN201420731403.9U patent/CN204359906U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459527A (en) * | 2014-11-28 | 2015-03-25 | 广东华田电器有限公司 | Automatic tester for magnetic steel temperature limiter and testing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20191128 |
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| CF01 | Termination of patent right due to non-payment of annual fee |