CN101968521A - Thermal stability test heating method for electric appliance and special oven thereof - Google Patents
Thermal stability test heating method for electric appliance and special oven thereof Download PDFInfo
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- CN101968521A CN101968521A CN2010102676519A CN201010267651A CN101968521A CN 101968521 A CN101968521 A CN 101968521A CN 2010102676519 A CN2010102676519 A CN 2010102676519A CN 201010267651 A CN201010267651 A CN 201010267651A CN 101968521 A CN101968521 A CN 101968521A
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Abstract
The invention provides a thermal stability test heating method for an electric appliance and a special oven thereof. The thermal stability test heating method is characterized in that a sample is heated at a constant temperature through the inner wall of the oven to achieve the purpose of completing the thermal stability test of the sample under the condition of still air, and the atmosphere condition of infinite constant temperature in real condition is simulated through the constant-temperature inner wall. The special over comprises an outer shell, a medium shell, an inner shell and an insulation layer arranged between the outer shell and the medium shell and made of insulation material, an internal heating medium is filled between the medium shell and the inner shell, the temperature of the surface of the inner shell is measured by an electric heating couple and transferred into an internal heating controller; and the internal heating controller is determined whether to raise the temperature by heating or not through comparison and judgment of the internal heating controller and the set value to ensure that the medium between the medium shell and the inner shell continuously circulates and constant-temperature heat supply in the oven. By adopting the method and the oven of the invention, the purposes of better reflecting the operation condition of the electric appliance through the test and improving the operation reliability of the electric appliance can be achieved.
Description
Technical field
The present invention relates to electric equipment products heat stabilization test technical field, relate in particular to a kind of electric equipment products heat stabilization test heating means and electric equipment products heat stabilization test special bake oven.
Background technology
The mode that present baking oven is all sent by air after the air heat in the direct heated oven heats the electrical equipment test product in the baking oven.When air heat arrives design temperature, by electrothermal relay excision heating source; When air is lower than design temperature, inserts heating source by electrothermal relay and heat.This mode is not as adopting air supply mode, and then the temperature in the baking oven will depend on the thermal value of environment temperature test product and the heat dissipation capacity of baking oven; As the heat dissipation capacity of the baking oven thermal value greater than test product, temperature will be fluctuation up and down around design temperature in the baking oven.Greater than the baking oven heat dissipation capacity, temperature will reach new balance in the some temperature that are higher than design temperature in the baking oven as the test product thermal value.But which kind of state no matter, it is the radiator of benchmark with the environment temperature that baking oven all is one.Environment temperature is difficult to stable finishing under design temperature in the test, and is difficult to accurately measure the temperature value of test product.
Heat existing problem for solving still air, baking oven often adopts the high wind heating of design temperature at present.Though this type of heating can make the temperature stabilization in the baking oven, this test method of one does not meet standard-required; Its two by the cooling power of high wind much larger than still air.Therefore cause the result of this method test to be: the temperature rise when the temperature rise meeting under the electric equipment products test condition is lower than actual motion, the i.e. product of the stand the test stable operation under service condition surely that differs.
Therefore, be necessary to provide a kind of electric equipment products heat stabilization test heating means and a kind of electric equipment products heat stabilization test special bake oven, make electric equipment products in baking oven, carry out heat stabilization test and can reflect the situation of actual motion preferably, and the electric equipment products quality is made correct evaluation.
Summary of the invention
Technical matters to be solved by this invention is: for solving the baking oven in the electric equipment products heat stabilization test in the prior art since adopt directly electric equipment products are heated or since adopt high wind to heat to bring cause test findings inaccurate, the problem of test figure be can't accurately record, and a kind of new electric equipment products heat stabilization test heating means and special bake oven proposed.
The technical solution adopted in the present invention is: a kind of electric equipment products heat stabilization test heating means, it is characterized in that, adopt hexahedron independence heated at constant temperature mode, make baking oven in the process of heating in the baking oven air remain static all the time, this heated at constant temperature process is independently, the not influence of current collector test product heating, play the effect of the infinitely great systems stabilisation of simulation the Nature, and be implemented under the stable environment temperature, realization is heated in the still air condition test product, satisfies the requirement to the test product heating condition of national standard and industry standard.When the test product thermal value is big, six heated at constant temperature bodies will play the constant temperature heat-absorbing action, and six faces still are to remain on the design temperature, and but test product thermal value hour, six heated at constant temperature bodies play heat effect to test product.
A kind of electric equipment products heat stabilization test special bake oven, it is characterized in that, comprise shell body, middle shell, inner housing and the heat-insulation layer that constitutes by insulation material between shell body and middle shell, be filled with heating medium between middle shell and the inner housing, so that inner housing adds the effect of heat radiator in playing, the temperature on the inner housing surface of six faces is measured by electroheat pair, and import interior heating controller into, relatively judge through interior heating controller and setting value, heating controller heat temperature raising whether in determining, the interior heating medium that heats to certain value is sent by interior heating medium and mouthful is sent, reflux by interior heating medium refluxing opening, so that the medium between middle shell and inner housing constantly circulates, guarantee the constant temperature heat supply in the baking oven.The technique effect that brings thus is at least: the present invention adopts well heater independence temperature control, heated at constant temperature under design temperature, the static heated condition in air place in the baking oven, the baking oven air themperature only is used to measure and is not used in the method that control is heated, and reaches the purpose of carrying out heat stabilization test in still air of standard-required.The atmospheric environment of the design temperature of peripheral well heater simulation simultaneously, and the temperature field of electrical equipment test product is distributed, radiating condition and physical condition are close.Therefore, the electrical equipment heat stabilization test of adopting this baking oven to carry out can be reacted the hot situation of electric equipment products more truly, reaches the purpose that guarantees the electric equipment products reliability.
Aforesaid electric equipment products heat stabilization test special bake oven, it is characterized in that: further comprise an outer heating system, described outer heating system comprises that an outer well heater, outer heating medium are sent mouthful, an outer heating medium refluxing opening and an outer heater controller, electric equipment products are heated by outer well heater, heating medium is sent mouth by outer heating medium and is sent, reflux by outer heating medium refluxing opening, the operation of outer well heater, stop by outer heating controller control.The technique effect that brings thus is at least: because lower to the test product efficiency of heating surface in still air, in order to address this problem, increase by an outer heating system, so at first heat by outer heating, when test product is heated to set condition, outer well heater is just out of service, only by internal heater and inner housing heat supply work, reaches electric equipment products are finished the thermal stability test under the condition of still air, surrounding enviroment temperature constant effect.
Aforesaid electric equipment products heat stabilization test special bake oven, it is characterized in that: the static interior heating system that interior heating medium, middle shell, inner housing and Nei Jia heat radiator are constituted, can be undertaken by under the design temperature test product being carried out heated at constant temperature by heating system in static by can thermostatically controlled direct heating system substituting.The technique effect that brings thus is at least: undertaken by under the design temperature test product being carried out heated at constant temperature by heating system in static, then having shell to loose naturally when unnecessary heat removes, and the temperature constant state that keeps static internal heater place to set, reaching like this around the baking oven all is temperature constant states, and guarantees that test product is that air is to finish heat stabilization test under the static condition in baking oven.
Aforesaid electric equipment products heat stabilization test special bake oven is characterized in that: can the air channel be set at middle shell and internal heater heating radiator, carry out wind-cooling heat dissipating.The technique effect that brings thus is at least: can accelerate the radiating effect of shell, and the temperature constant state that keeps static internal heater place to set reaches electric equipment products are finished the thermal stability test under the condition of still air, surrounding enviroment temperature constant effect.
The invention has the beneficial effects as follows: owing on the baking oven inwall, arrange well heater, heter temperature independently is provided with and controls, be not subjected to the influence of air themperature in the baking oven, heter temperature in the baking oven wall is provided with according to the serviceability temperature upper limit of electric equipment products, and be controlled on certain given temperature value, simulate infinitely-great atmospheric environment with limited space like this.When electric equipment products are carried out heat stabilization test in this baking oven, thermal value regardless of electric equipment products, owing to be subjected to the constraint of a steady temperature field all around, the temperature field of distribution all very similar electric equipment products in temperature field under the calm method of operation under the true service condition of its electric equipment products.And the still air in the baking oven is also with the calm condition correspondence under the atmospheric conditions.Therefore, the radiating condition of its electric equipment products also conforms to service condition.The better purpose of reflection electric operation situation of test can be reached like this, and the purpose that improves the electric equipment products operational reliability can be reached.The situation of the Infinite bus system of this constant temperature of simulation true environment preferably, and electric equipment products can effectively be accomplished in still air in heat stabilization test, periphery is for carrying out in the steady temperature condition, and make test can good reproduction real running environment, and make test findings truer, reliable, help guaranteeing the reliability service of electric product.
Description of drawings
Fig. 1 is the structural representation of the electric equipment products heat stabilization test special bake oven of first embodiment of the invention;
Fig. 2 is the structural representation of the electric equipment products heat stabilization test special bake oven of second embodiment of the invention;
Fig. 3 is the structural representation of the electric equipment products heat stabilization test special bake oven of third embodiment of the invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The explanation of mark among Fig. 1: the 1-shell body, heating medium in the 2-heat-insulation layer, 3-, the 4-middle shell, heating medium is sent mouth in the heating medium refluxing opening in the 5-inner housing, 6-, 7-, and heating controller in the 8-internal heater, 9-adds heat radiator, the 15-thermopair in the 14-.
The outer heating medium of the explanation of mark: 10-is sent mouth among Fig. 2, the outer heating medium refluxing opening of 11-, the outer well heater of 12-, the outer heater controller of 13-.
As shown in Figure 1, fill insulation material between the shell body 1 of the electric equipment products heat stabilization test special bake oven of first embodiment of the invention and the middle shell 4, constituting heat-insulation layer 2.This double Shell that accompanies heat-insulation layer constitutes the seal of a band door.5 of middle shell 4 and inner housings form one have in heating medium 3, make inner housing 5 add heat radiator 14 in playing a part, the temperature on inner housing 5 surfaces is measured by electroheat pair 15, imports interior heating controller 9 into.Relatively judge with setting value through interior heating controller 9, determine whether heat temperature raising of internal heater 8, the interior heating medium 3 that heats to certain value is sent mouthfuls 7 by interior heating medium and is sent, reflux by interior heating medium refluxing opening 6, the medium of 5 of middle shell 4 and inner housings is constantly circulated, guarantee the constant temperature heat supply in the baking oven.Inner housing 5 air and test product heat supply in baking oven when test product places baking oven of the present invention like this, test product is big or small in the heat stabilization test heating, whether generating heat to all whether heating with internal heater 8 has nothing to do.Can guarantee like this that test product is strict in heat stabilization test carries out in still air by standard-required.The thermostatic control of the inner housing of 6 (or inwalls) by baking oven, simulation true environment preferably, it is the situation of the Infinite bus system of a constant temperature, and electric equipment products can effectively be accomplished in still air in heat stabilization test, periphery is for carrying out in the steady temperature condition, and make test energy good reproduction real running environment, and make test findings truer, reliable, help guaranteeing the reliability service of electric product.
Because lower to the test product efficiency of heating surface in still air, for a change this situation has just had second embodiment.
As shown in Figure 2, second embodiment of the invention is to have increased outer heating system on the basis of first embodiment, like this when doing the electric equipment products heat stabilization test, heat by outer well heater 12 earlier, heating medium is sent mouth 10 by outer heating medium and is sent, reflux by outer heating medium refluxing opening 11, the operation of outer well heater 12, stop by outer heating controller 13 controls.When test product was heated to set condition, outer well heater 12 was out of service, only by internal heater 8 and inner housing 5 heat supply work, reaches electric equipment products and finish the thermal stability test under the condition of still air, surrounding enviroment temperature constant.
In case study on implementation, the static interior heating system that interior heating medium 3, middle shell 4, inner housing 5 and internal heater 8 are constituted, also can directly make can thermostatically controlled direct heating system.This has just constituted the third embodiment of the present invention.As shown in Figure 3, in the 3rd embodiment, undertaken by under the design temperature test product being carried out heated at constant temperature by heating system in static.When unnecessary heat, then have shell to loose naturally and remove, also can middle shell 4 with in add heat radiator 14 air channel be set, carry out wind-cooling heat dissipating.And the temperature constant state that keeps static internal heater 14 places to set, reaching like this around the baking oven all is temperature constant states, and guarantees that test product is that air is to finish heat stabilization test under the static condition in baking oven.
Claims (5)
1. electric equipment products heat stabilization test heating means, it is characterized in that, adopt hexahedron independence heated at constant temperature mode, make baking oven in the process of heating in the baking oven air remain static all the time, this heated at constant temperature process is independently, the not influence of current collector test product heating, play the effect of the infinitely great systems stabilisation of simulation the Nature, and be implemented under the stable environment temperature, test product is heated under the still air condition, satisfy the requirement of national standard and industry standard the test product heating condition.
2. electric equipment products heat stabilization test special bake oven, it is characterized in that, comprise shell body, middle shell, inner housing, and the heat-insulation layer that constitutes by insulation material between shell body and middle shell, be filled with heating medium between the middle shell of six faces and the inner housing, so that inner housing adds the effect of heat radiator in playing, the temperature on inner housing surface is measured by electroheat pair, and import interior heating controller into, relatively judge through interior heating controller and setting value, heating controller heat temperature raising whether in determining, the interior heating medium that heats to certain value is sent by interior heating medium and mouthful is sent, reflux by interior heating medium refluxing opening,, guarantee the constant temperature heat supply in the baking oven so that the medium between middle shell and inner housing constantly circulates.
3. electric equipment products heat stabilization test special bake oven according to claim 2, it is characterized in that: further comprise an outer heating system, described outer heating system comprises that an outer well heater, outer heating medium are sent mouthful, an outer heating medium refluxing opening and an outer heater controller, electric equipment products are heated by outer well heater, heating medium is sent mouth by outer heating medium and is sent, reflux by outer heating medium refluxing opening, the operation of outer well heater, stop by outer heating controller control.
4. electric equipment products heat stabilization test special bake oven according to claim 2, it is characterized in that: the static interior heating system that interior heating medium, middle shell, inner housing and Nei Jia heat radiator are constituted, by can thermostatically controlled direct heating system substituting, undertaken by under the design temperature test product being carried out heated at constant temperature by heating system in static.
5. electric equipment products heat stabilization test special bake oven according to claim 2 is characterized in that: at middle shell and internal heater heating radiator the air channel is set, carries out wind-cooling heat dissipating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010102676519A CN101968521A (en) | 2010-08-31 | 2010-08-31 | Thermal stability test heating method for electric appliance and special oven thereof |
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| CN2010102676519A CN101968521A (en) | 2010-08-31 | 2010-08-31 | Thermal stability test heating method for electric appliance and special oven thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645596A (en) * | 2012-04-11 | 2012-08-22 | 中国电力科学研究院 | High-voltage and high-current composite thermally stable test method and device for high-voltage casing pipe |
| CN106020288A (en) * | 2016-06-29 | 2016-10-12 | 爱佩仪中测（成都）精密仪器有限公司 | Workshop structure for precision measurement |
| CN108535172A (en) * | 2018-03-28 | 2018-09-14 | 广州供电局有限公司 | Thermal aging test device and thermal aging test method |
| CN108931717B (en) * | 2017-05-25 | 2021-10-08 | 京元电子股份有限公司 | High-low temperature switching test module |
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| JPH01239427A (en) * | 1988-03-18 | 1989-09-25 | Nec Corp | Cooling container for evaluating photodetector |
| US20020135389A1 (en) * | 2001-03-20 | 2002-09-26 | Melgaard Hans L. | Wafer-level burn-in oven |
| CN201033381Y (en) * | 2007-06-15 | 2008-03-12 | 中国航天科技集团公司第五研究院第五○四研究所 | Parameter controllable aluminum soldering air stove |
| CN101441252A (en) * | 2007-11-22 | 2009-05-27 | 拏罗电池科技株式会社 | Apparatus for evaluating electrochemical properties of fuel cell |
| CN101576520A (en) * | 2009-06-03 | 2009-11-11 | 中国科学院化学研究所 | Thermal power measurement device |
| CN201828619U (en) * | 2010-08-31 | 2011-05-11 | 国网电力科学研究院 | Drying oven special for testing thermal stability of electrical appliance product |
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2010
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Patent Citations (6)
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| JPH01239427A (en) * | 1988-03-18 | 1989-09-25 | Nec Corp | Cooling container for evaluating photodetector |
| US20020135389A1 (en) * | 2001-03-20 | 2002-09-26 | Melgaard Hans L. | Wafer-level burn-in oven |
| CN201033381Y (en) * | 2007-06-15 | 2008-03-12 | 中国航天科技集团公司第五研究院第五○四研究所 | Parameter controllable aluminum soldering air stove |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645596A (en) * | 2012-04-11 | 2012-08-22 | 中国电力科学研究院 | High-voltage and high-current composite thermally stable test method and device for high-voltage casing pipe |
| CN102645596B (en) * | 2012-04-11 | 2015-07-08 | 中国电力科学研究院 | High-voltage large-current composite thermal stability test method and device for high-voltage bushing |
| CN106020288A (en) * | 2016-06-29 | 2016-10-12 | 爱佩仪中测（成都）精密仪器有限公司 | Workshop structure for precision measurement |
| CN108931717B (en) * | 2017-05-25 | 2021-10-08 | 京元电子股份有限公司 | High-low temperature switching test module |
| CN108535172A (en) * | 2018-03-28 | 2018-09-14 | 广州供电局有限公司 | Thermal aging test device and thermal aging test method |
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Application publication date: 20110209 |