CN201034899Y - High accelerating temperature changing test box - Google Patents
High accelerating temperature changing test box Download PDFInfo
- Publication number
- CN201034899Y CN201034899Y CNU2007200357512U CN200720035751U CN201034899Y CN 201034899 Y CN201034899 Y CN 201034899Y CN U2007200357512 U CNU2007200357512 U CN U2007200357512U CN 200720035751 U CN200720035751 U CN 200720035751U CN 201034899 Y CN201034899 Y CN 201034899Y
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- 238000012360 testing method Methods 0.000 title claims abstract description 35
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 48
- 239000007788 liquid Substances 0.000 claims description 24
- 229910052757 nitrogen Inorganic materials 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 19
- 230000001133 acceleration Effects 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract 2
- 238000012216 screening Methods 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000002950 deficient Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
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Abstract
The utility model relates to a highly accelerated temperature difference testing box, which belongs to the technical field of environment testing equipment. The utility model is characterized in that: a motor is arranged on the studio, the shaft end of the motor is provided with an axial flow blade; the studio is provided with an air intake plate which forms a box upper cavity A with an liner, the air outlet plate and the liner form a box lower cavity B; the box upper cavity A is provided with a nozzle. The utility model can stimulate the potential defects of the product into observable faults, which can fast carry out the test under the limit stress regulated by the technical condition and find out the working limit even to reach the damage limit finally; then, the utility model can formulate the highly accelerated stress screening test scheme according to the limit determined by the service life test, the production manufacturing defects can be rejected by the highly accelerated stress screening test, so the product can reach the reliability rapidly; the biggest difference between the product and the prior high and low temperature testing box in domestic is the rate of rising and decreasing temperature and the linear stepping high temperature difference.
Description
Technical field
The utility model relates to a kind of high acceleration temperature changing test chamber, specifically is used for equipment is carried out Highly Accelerated Life Test and highly accelerated stress screen test, belongs to the environmental test equipment technical field.
Background technology
Along with the improvement of industrial fast development of China and military hardware, the q﹠r of product is required more and more higher, thereby also higher to the requirement of the kind of reliability consideration imperative equipment-environmental test equipment, quality.High acceleration temperature changing test chamber is Highly Accelerated Life Test (HALT) and the used testing equipment of highly accelerated stress screen (HASS) test.Different with traditional fail-test, the purpose of durability test (HALT) test is to excite fault, promptly the potential defective of product is excited into observable fault.Therefore, it is not the test of adopting the actual environment for use of general simulation to carry out, but the people testing fast, finds out the working limit of product even the damage limit that finally reaches for applying stepstress under the ultimate stress of technical conditions regulation.Then, work out highly accelerated stress screen (HASS) testing program, reject by highly accelerated stress screen (HASS) and manufacture defective, make product reach reliability fast according to the definite limit of durability test (HALT).
In prior art, high acceleration temperature changing test chamber mainly is made up of air-flow forced circulation part, pressure balancing system and electrical control part etc. in casing part, heating part, refrigerating part, the case.Heating part, refrigerating part, pressure balancing system are arranged in the casing, and electrical control part is connected by the parts that grade of heating part in lead and the case.Refrigerating part adopts the mechanical type refrigeration, and 10 ℃/min of maximum rate of temperature fall and non-linear temperature become; Airshed is difficult to control in the case.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned weak point, thereby a kind of high acceleration temperature changing test chamber is provided, and adopts LN
2Air-flow forced circulation in (liquid nitrogen) refrigeration, nickel-chrome electrical heating, the case, thus realize that big temperature change scope, ultralow temperature, high temperature variability, linear stepping high temperature become 60 ℃/min of maximum rate of temperature fall.
Main solution of the present utility model is achieved in that
The utility model mainly is made up of air-flow forced circulation part, pressure balancing system and electrical control part in operating room, heating part, refrigerating part, the case, and electrical control part is connected by the parts that grade of heating part in lead and the case.Feature is that motor is installed on top, described operating room, at the axle head of motor axial-flow leaf is housed; Be provided with air draught oralia, air-out oralia in the described operating room, have air draught oralia and inner bag and form casing upper cavity A, air-out oralia and inner bag form casing lower chamber B; In the described casing upper cavity A jet pipe is set, the air-out oralia is provided with air outlet, forms the air-flow circulation passage in the operating room.
Described refrigerating part adopts installs solenoid valve on jet pipe, pipeline one end connects liquid nitrogen storage tank, and the other end is connected with solenoid valve, and liquid nitrogen is housed in liquid nitrogen storage tank, and pressure regulator valve is installed on the pipeline.
Described casing upper cavity A highly is: 280-300mm.
Described casing lower chamber B width is: 90-100mm.
Compared with the prior art the utility model has the following advantages:
The utility model is simple, compact and reasonable for structure; Can be excited into observable fault to the potential defective of product; Can under the ultimate stress of technical conditions regulation, test fast, find out the working limit of product even the damage limit that finally reaches; Can work out the highly accelerated stress screen testing program according to the limit that durability test is determined then, reject by the highly accelerated stress screen test and manufacture defective, make product reach reliability fast; This product is that with the maximum difference of domestic existing high-low temperature test chamber temperature rate and linear stepping high temperature become.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model K-K cut-open view.
Fig. 3 is the utility model control flow chart.
Embodiment
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
The utility model is mainly by motor 1, jet pipe 2, axial-flow leaf 3, pressure compensation opening 4, back shroud 5, shell 6, heat-insulation layer 7, inner bag 8, air-flow 9 in the case, channel-section steel support 10, air draught oralia 11, air-out oralia 12, operating room 13, casing upper cavity A, casing lower chamber B, air outlet 14, electric appliance control box 15, outer sealing strip 16, door weather strip 17, fiberglass connection box 18, internal layer sealing strip 19, baffle plate 20, support 21, stainless steel nickel filament ceramics bracket well heater 22, illuminating lamp 23, high-low temperature resistant band conducting film double glazing 24, door 25, liquid nitrogen storage tank 26, pressure regulator valve 27, pipeline 28, solenoid valve 29 compositions such as grade.
As shown in Figure 1 and Figure 2: the utility model mainly is made up of air-flow forced circulation part, pressure balancing system and electrical control part in operating room, heating part, refrigerating part, the case.Heating part, refrigerating part, pressure balancing system are separately positioned in the casing upper cavity A, and appliance controller 15 is connected by the parts that grade of heating part in lead and the case.Described operating room 13 is made up of inner bag 8, heat-insulation layer 7 and shell 6 three parts.Inner bag 8 adopts the stainless steel wire drawing plate to make; Shell 6 adopts cold-rolled steel sheet to make, and handles at surface plastic spraying; Heat-insulation layer 7 is a super glass wool.Connect with fiberglass connection box 18 between inner bag 8 and the shell 6, rise and cut off cold and hot conduction.On casing upper cavity A top motor 1 is housed, axial-flow leaf 3 is housed at the axle head of motor 1.Operating room's 13 usefulness channel-section steel supports, 10 supportings connect with bolt between it.In operating room 13, be provided with pressure compensation opening 4, the room pressure height back shroud 5 can open pressure release, pressure is closed when low automatically.
The air-flow forced circulation partly adopts and be provided with air draught oralia 11, air-out oralia 12 and baffle plate 20 in operating room 13 in the described case, form casing upper cavity A by air draught oralia 11 and inner bag 8, reach by air-out oralia 12 and inner bag 8 and form casing lower chamber B, in operating room 13, form the air-flow circulation passage.Described casing upper cavity A highly is: 280-300mm.Casing lower chamber B width is: 90-100mm.Air-flow 9 carries out forced circulation by direction as shown.In the described casing upper cavity A jet pipe 2 is set, is provided with air outlet 14 on the air-out oralia 12,
Described refrigerating part adopts installs solenoid valve 29 on jet pipe 2, pipeline 28 1 ends connect liquid nitrogen storage tank 26, and the other end is connected with solenoid valve 29, in liquid nitrogen storage tank 26 liquid nitrogen is housed, and pressure regulator valve 27 is installed on the pipeline 28.Liquid nitrogen from liquid nitrogen storage tank 26 in pressure regulator valve 27, pipeline 28, solenoid valve 29 and 2 mouthfuls of input magazines of jet pipe.
Described heating part adopts stainless steel nickel filament ceramics bracket well heater 22 to be connected with support 21 usefulness screws, and support 21 is connected to casing upper cavity A top with screw again.
17 sealings of described door 25 usefulness door weather strips with internal layer sealing strip 19 and outer sealing strip 16 double sealing structures, are equipped with the view window and the illuminating lamp 23 of high-low temperature resistant band conducting film double glazing 24 between door 25 and the operating room 13 on the door 25.
As shown in Figure 3: temperature controller connects executive component and power drive by lead, executive component and power driving circuit connect blower fan by lead, blower fan connects the chamber work space by lead, the chamber work space is connected with temperature sensor, and temperature sensor connects temperature controller by lead; PID control analogue quantity output circuit is set, temperature data acquisition circuit, temperature demonstration and setting, auxiliary control signal output circuit and RS232 microcomputer communication circuit in temperature controller; Temperature controller is connected with system controlled by computer and datalogger and electric quantity signal conversion and driving circuit respectively; Electric quantity signal conversion and driving circuit connect executive component and power driving circuit, and executive component and power driving circuit are connected with well heater and liquid nitrogen electric control valve by lead respectively, and liquid nitrogen storage tank connects the liquid nitrogen electric control valve; Well heater connects the chamber work space, and the liquid nitrogen electric control valve connects the chamber work space.
The control of entire equipment is to be realized by control system, and temperature controller is made up of demonstration, data acquisition, computing, analysis and the computing machine communication of temperature.There is high-precision temperature sensor (PT100) to measure temperature, difference because of temperature, temperature sensor (PT100) produces different resistance, temperature controller is gathered different resistance values, demonstrate Current Temperatures by calculation process, when equipment operation, compare, export the control signal and the voltage duty cycle signal of analog quantity by the computing of PID control analogue quantity output circuit by controller according to temperature of setting and the real-time data of gathering of temperature sensor.The voltage duty cycle signal offers the solid-state relay in the power drive, inside in the controller is provided with the output that parameter is judged auxiliary signal, when being set, temperature closes the quantity of some heating group numbers, auxiliary signal is output as the little current signal of low-voltage direct, convert the auxiliary reclay of AC220V to by the auxiliary reclay of low voltage DC 24V, and power controlling element A.C. contactor, A.C. contactor cooperates solid-state relay control heating element-well heater that casing is heated, pass through the control of the auxiliary reclay of AC220V simultaneously cold is controlled in the adjusting of liquid nitrogen motorized valve, the interaction of beginning reaches the temperature value that sets.
The startup of blower fan and the work of temperature controller are synchronous, work the temperature field of regulating in the operating room, make it more even.
The control of heat: heating element divides five groups of controls, two groups is without the control of PID control analogue quantity output circuit, directly control by the temperature deviation in the output of auxiliary signal, work as temperature one group of heating of following inclined to one side 17 ℃ of segments during work near setting value, following inclined to one side 12 ℃ of one group of heating of segment again near setting value, two groups through the control of PID control analogue quantity output circuit, cooperate the output of auxiliary signal, temperature so prevents the overshoot of spin manifold temperature near scope one group or two groups heating of segment again of following inclined to one side 5 ℃ and the temperature province of setting value.Have only one the tunnel to be the control of PID control analogue quantity output circuit, adjust the degree of stability of casing.
The control of cold: the liquid nitrogen of liquid nitrogen storage tank is adjusted at pressure between the 0.2-0.3Mpa through pressure-regulating valve, with the PID control analogue quantity output circuit regulating and controlling liquid nitrogen motorized valve opening time, the emitted dose of flow in casing of control liquid nitrogen, heat in the vaporization respiratory box of liquid nitrogen, the size of the flow of liquid nitrogen is the size of refrigerating capacity.Control two groups of time-divisions, PID control analogue quantity output circuit regulating and controlling all the time on, when temperature near the time cut off one group, reduce the impact of cold, another group is used for refrigeration and keeps.
During the course, when near and the heat cold is all with few width of cloth output when reaching setting value, mutual cold and hot balance is to reach high-precision temperature control.
Temperature controller has communication function, adopts RS232 to be connected in computing machine, but computing machine can also can be operated and the data record control by software.
The utility model basic mechanical design feature: temperature range :-100 ℃-+200 ℃; Temperature rate: 5 ℃-60 ℃/min is adjustable, PT100A sensor thermometric PID (be with anti-integration saturated) control, when the equipment heating and cooling arrived setting value, the overshoot of temperature was less than 3 ℃, and reached stable at 1-2 minute with interior, and temperature fluctuation is in ± 0.5 ℃.
Claims (5)
1. high acceleration temperature changing test chamber, mainly form by air-flow forced circulation part, pressure balancing system and electrical control part in operating room, heating part, refrigerating part, the case, electrical control part is connected with heating part by lead, it is characterized in that installing motor (1), axial-flow leaf (3) is housed at the axle head of motor (1) on top, described operating room (13); Be provided with air draught oralia (11), air-out oralia (12) in the described operating room (13), have air draught oralia (11) and form casing upper cavity A with inner bag (8), air-out oralia (12) forms casing lower chamber B with inner bag (8); In the described casing upper cavity A jet pipe (2) is set.
2. high acceleration temperature changing test chamber according to claim 1, it is characterized in that described refrigerating part adopts at the last solenoid valve (29) of installing of jet pipe (2), pipeline (28) one ends connect liquid nitrogen storage tank (26), the other end is connected with solenoid valve (29), in liquid nitrogen storage tank (26) liquid nitrogen is housed, pressure regulator valve (27) is installed on the pipeline (28).
3. high acceleration temperature changing test chamber according to claim 1 is characterized in that described casing upper cavity A highly is: 280-300mm.
4. high acceleration temperature changing test chamber according to claim 1 is characterized in that described casing lower chamber B width is: 90-100mm.
5. high acceleration temperature changing test chamber according to claim 1 is characterized in that setting out on the described air-out oralia (12) air port (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200357512U CN201034899Y (en) | 2007-03-27 | 2007-03-27 | High accelerating temperature changing test box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200357512U CN201034899Y (en) | 2007-03-27 | 2007-03-27 | High accelerating temperature changing test box |
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| Publication Number | Publication Date |
|---|---|
| CN201034899Y true CN201034899Y (en) | 2008-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200357512U Expired - Fee Related CN201034899Y (en) | 2007-03-27 | 2007-03-27 | High accelerating temperature changing test box |
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| Country | Link |
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| CN (1) | CN201034899Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389319A (en) * | 2012-05-10 | 2013-11-13 | 海洋王（东莞）照明科技有限公司 | Test method for rapidly exposing welding defects of printed circuit board, and test system thereof |
| CN106033024A (en) * | 2015-03-17 | 2016-10-19 | 中国科学院寒区旱区环境与工程研究所 | Optical-instrument low temperature environment test box |
| CN106124893A (en) * | 2016-06-23 | 2016-11-16 | 芜湖顺成电子有限公司 | The thermal shock test chamber of low smoke no-halogen wire |
| CN107297227A (en) * | 2017-07-06 | 2017-10-27 | 上海卫星装备研究所 | A kind of low temperature impact test box liquid nitrogen spraying device |
-
2007
- 2007-03-27 CN CNU2007200357512U patent/CN201034899Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389319A (en) * | 2012-05-10 | 2013-11-13 | 海洋王（东莞）照明科技有限公司 | Test method for rapidly exposing welding defects of printed circuit board, and test system thereof |
| CN106033024A (en) * | 2015-03-17 | 2016-10-19 | 中国科学院寒区旱区环境与工程研究所 | Optical-instrument low temperature environment test box |
| CN106124893A (en) * | 2016-06-23 | 2016-11-16 | 芜湖顺成电子有限公司 | The thermal shock test chamber of low smoke no-halogen wire |
| CN107297227A (en) * | 2017-07-06 | 2017-10-27 | 上海卫星装备研究所 | A kind of low temperature impact test box liquid nitrogen spraying device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUXI CITY NANYA TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: GU GU Effective date: 20110117 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 214024 WUXI NANQU TEST EQUIPMENT CO., LTD., NO.92, AREA B, YANGMING NEW + HIGH TECHNOLOGY INDUSTRIAL PARK, WUXI CITY, JIANGSU PROVINCE TO: 214024 NO.107, AREA B, YANGMING NEW + HIGH TECHNOLOGY INDUSTRIAL ZONE, NANCHANG DISTRICT, WUXI CITY, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110117 Address after: 214024, No. 107, B District, famous hi tech Industrial Park, Nanchang District, Jiangsu, Wuxi Patentee after: Wuxi Nanya Technology Co., Ltd. Address before: 214024 Jiangsu city in Wuxi province famous high-tech industrial park B District No. 92 Wuxi city test equipment Co. Patentee before: Gu Yun |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080312 Termination date: 20120327 |