CN204964347U - Environmental testing apparatus - Google Patents
Environmental testing apparatus Download PDFInfo
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- CN204964347U CN204964347U CN201520508369.3U CN201520508369U CN204964347U CN 204964347 U CN204964347 U CN 204964347U CN 201520508369 U CN201520508369 U CN 201520508369U CN 204964347 U CN204964347 U CN 204964347U
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- refrigeration system
- test device
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Abstract
The utility model provides an environmental testing apparatus, include: box, test bench and refrigerating system, the test bench with refrigerating system all sets up the inside of box, refrigerating system is used for reducing the surface temperature of test bench, the test bench is used for placing components and parts. When carrying out environmental test, components and parts are placed and are carried out environmental test on the surface of test bench, through above -mentioned structure, refrigerating system only need reduce the temperature on test bench surface, compares prior art and need reduce space temperature, can improve the speed of the temperature of going up and down greatly to save a test duration's time.
Description
Technical field
The utility model relates to the technical field that components and parts are measured, and especially relates to environment test device.
Background technology
Components and parts and combinational circuit thereof are widely used in all trades and professions of military project and civilian goods, in components and parts production run, there will be underproof product, and these underproof products also exist certain defect: defective workmanship, components and parts defect and design defect, etc.Defective workmanship mainly inappropriate technology causes, common as rosin joint, get loose, rupture, open a way, short circuit etc.; Components and parts defect is that the screening of components and parts with low quality or components and parts environmental test itself does not thoroughly cause; Design defect mainly to design unreasonable causing.
Enterprise, in development and technological development stage, needs to carry out environmental test to components and parts, to find fast and accurately and get rid of bad part and prevent initial failure; Environmental test refers to and its objective is the series of experiments that components and parts carry out under environmental stress before product is produced, and intentionally environmental stress is applied on product, makes the accelerated development of product latent defect become initial failure, and is got rid of; Environmental stress screening is the effective process means of one of rejecting product defects and improving product dependability.
The testing equipment carried out needed for environmental stress screening is commonly referred to environmental test chamber, environmental test chamber comprises test space, refrigeration unit and circulating fan, the cold air that refrigeration unit produces can blow in test space by circulating fan, take the hot-air in test space simultaneously out of, thus change the temperature in test space.
Known by above-mentioned analysis, environmental test chamber of the prior art carries out temperature controlled to space, because spatial volume is comparatively large, therefore, needs the longer time just can reach test temperature.
Utility model content
The purpose of this utility model is to provide environment test device, comparatively slow to solve the temperature rate existed in prior art, single test cycle longer technical matters consuming time.
A kind of environment test device that the utility model provides, comprising: casing, testing table and refrigeration system, and described testing table and described refrigeration system are all arranged on the inside of described casing; Described refrigeration system is for reducing the surface temperature of described testing table, and described testing table is for placing components and parts.
Further, described testing table comprises base and upper cover, and described upper cover is arranged on described base, and forms the spatial accommodation for holding cold-producing medium with described base;
Described spatial accommodation is connected with described refrigeration system, and described cold-producing medium can circulate between described spatial accommodation and described refrigeration system;
The madial wall level connection joint of described testing table and described casing.
Further, described base is provided with refrigerant flow path, and the two ends of described refrigerant flow path are all connected with described refrigeration system, and described cold-producing medium can flow in described refrigerant flow path.Further, described upper cover and described base are made by red copper material.
Further, described upper cover is welded on described base by the mode of vacuum brazing.
Further, described testing table also comprises the fixed head for fixing components and parts to be detected, described fixed head be arranged on described on cover.
Further, described refrigeration system comprises the first compressor, the second compressor, the first expansion valve, the second expansion valve, condenser and heat interchanger;
The two ends of described refrigerant flow path are all connected by connecting pipe one end with described first compressor and described first expansion valve, described first compressor is connected with described heat interchanger respectively with the other end of described first expansion valve, and described refrigerant flow path, described first compressor, described first expansion valve and described heat interchanger form the loop of circulation;
Described second compressor is connected with described heat interchanger respectively with one end of described second expansion valve, described second compressor is connected with described condenser respectively with the other end of described second expansion valve, and described condenser, described second expansion valve, described heat interchanger and described second compressor form the loop of circulation.
Further, also comprise the temp measuring system for measuring tempeature, described temp measuring system is arranged on the inside of described casing.
Further, also comprise heat-insulation layer, described heat-insulation layer is arranged on the madial wall of described casing, and is positioned at the top of described upper cover.
Further, the sidewall of described casing is provided with multiple through wires hole, described through wires hole is positioned at the top of described upper cover.
Compared with prior art, the beneficial effect that the utility model has is:
The environment test device that the utility model provides, comprise casing, testing table and refrigeration system, testing table and refrigeration system are all arranged on the inside of casing, and refrigeration system can reduce the temperature on testing table surface, and environmental test is carried out on the surface that components and parts are placed on testing table; By said structure, refrigeration system only need reduce the temperature on testing table surface, needs compared to existing technology to reduce space temperature, greatly can improve the speed of heating and cooling, thus saves the time in single test cycle.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the environment test device that Fig. 1 provides for the utility model embodiment;
Fig. 2 is the front view of the environment test device shown in Fig. 1;
Fig. 3 is the schematic diagram of the testing table of the environment test device shown in Fig. 1;
Fig. 4 is the schematic diagram of the upper cover of the testing table shown in Fig. 3;
The base of Fig. 5 for the testing table shown in Fig. 3 and the schematic diagram of refrigerant flow path;
Fig. 6 is the schematic diagram of the refrigeration system of the environment test device shown in Fig. 1.
Reference numeral:
1-casing; 2-testing table; 3-refrigeration system;
4-through wires hole; 5-universal wheel;
21-upper cover; 22-base; 23-refrigerant flow path;
24-connecting pipe; 31-first compressor; 32-second compressor;
33-first expansion valve; 34-second expansion valve; 35-heat interchanger;
36-condenser;
211-threaded hole; 221-is protruding.
Embodiment
Be clearly and completely described the technical solution of the utility model below in conjunction with accompanying drawing, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
In description of the present utility model, it should be noted that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "left", "right", " vertically ", " level ", " interior ", " outward " they be based on orientation shown in the drawings or position relationship; be only the utility model and simplified characterization for convenience of description; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second ", " the 3rd " only for describing object, and can not be interpreted as instruction or hint relative importance.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.
The structural representation of the environment test device that Fig. 1 provides for the utility model embodiment; Fig. 2 is the front view of the environment test device shown in Fig. 1; Fig. 3 is the schematic diagram of the testing table of the environment test device shown in Fig. 1; Fig. 4 is the schematic diagram of the upper cover of the testing table shown in Fig. 3; The base of Fig. 5 for the testing table shown in Fig. 3 and the schematic diagram of refrigerant flow path; Fig. 6 is the schematic diagram of the refrigeration system of the environment test device shown in Fig. 1.
As shown in figures 1 to 6, the environment test device that the present embodiment provides, comprising: casing 1, testing table 2 and refrigeration system 3, and testing table 2 and refrigeration system 3 are all arranged on the inside of casing 1; Refrigeration system 3 is for reducing the temperature on testing table 2 surface, and testing table 2 is for placing components and parts.
The shell of the environment test device that casing 1 provides for the present embodiment, can be fixedly installed each component therein, and therefore, every structure that can function as described above can be the casing 1 of the present embodiment indication.
The Main Function of refrigeration system 3 is to testing table 2 surface cooling, testing table is provided with paster well heater simultaneously, thus can the temperature on adjustment test bed 2 surface, it is made to reach the requirement of environmental test, therefore, every system that can function as described above can as the refrigeration system 3 of the present embodiment indication.
Refrigeration system 3 can have multiple choices, such as: the natural refrigeration system that can adopt conventional refrigeration or employing mix refrigerant.Refrigeration system 3 can also select single-stage refrigeration, also can select cascade refrigeration, that is, use simultaneously overlap refrigeration system more.
When carrying out environmental test, first components and parts being placed on the surface of testing table 2, then controlling the temperature that refrigeration system 3 comes adjustment test bed 2 surface, after to be tested, close refrigeration system 3, take out components and parts, carry out Performance Detection.
It should be noted that, the environment test device that the present embodiment provides can also heat, and type of heating adopts SMD electrical heating particularly, that is, be attached on testing table by electric heating sheets, thus heats testing table surface.
The environment test device that the present embodiment provides, by said structure, refrigeration system 3 need reduce the temperature on testing table 2 surface, needs compared to existing technology to reduce space temperature, greatly can improve the speed of heating and cooling, thus save the time in single test cycle.
On the basis of above-described embodiment, particularly, as shown in Figure 3-Figure 5, testing table 2 comprises base 22 and upper cover 21, and upper cover 21 is arranged on base 22, and forms the spatial accommodation for holding cold-producing medium with base 22; Spatial accommodation is connected with refrigeration system 3, and cold-producing medium can circulate between spatial accommodation and refrigeration system 3; The madial wall level connection joint of testing table 2 and casing 1.
Cold-producing medium is placed in spatial accommodation, and spatial accommodation is connected with refrigeration system 3, thus cold-producing medium is circulated between spatial accommodation and refrigeration system 3, the cold-producing medium circulated can absorb the temperature on upper cover 21 surface, thus plays the object reducing temperature; The environment test device that the present embodiment provides, by the connection of spatial accommodation and refrigeration system 3, actual is be connected in refrigeration system 3 by testing table 2, and testing table 2 serves the effect of evaporator in refrigeration system 3.
It should be noted that, in order to reduce the loss of upper cover 21 heat, testing table 2 and the connection of casing 1 madial wall should be adiabatic and connect, and can be connected with the madial wall of casing 1 by base 22 or upper cover 21.
Adopt said structure, make testing table 2 can not only play the effect of placing components and parts, the effect of evaporator can also be played, evaporator in test product shelf in prior art and refrigeration system 3 just unites two into one by this, thus efficiently reduce the volume of the environment test device that the present embodiment provides, can use in the lab.
On the basis of above-described embodiment, particularly, as shown in Figure 5, base 22 is provided with refrigerant flow path 23, and the two ends of refrigerant flow path 23 are all connected with refrigeration system 3, and cold-producing medium can flow in refrigerant flow path 23.
It should be noted that, refrigerant flow path 23 can be arranged on base 22, also can be arranged on upper cover 21; In order to ensure the flatness on upper cover 21 surface, refrigerant flow path 23 be arranged on base 22, concrete mode is: on base 22, carve multiple groove, and is connected in series between multiple groove, thus forms snakelike refrigerant flow path 23; On base 22, region correspondence than grooves defines multiple protruding 221.
If be placed on by cold-producing medium in refrigerator pipes, this just makes cold-producing medium and the surperficial indirect contact of testing table 2, and when lowering the temperature, cold-producing medium can reduce the temperature of refrigerator pipes tube wall, and then refrigerator pipes tube wall reduces the temperature on testing table 2 surface again by heat exchange; But, if be placed on by cold-producing medium in refrigerant flow path 23, cold-producing medium just can be made directly to contact with upper cover 21, when lowering the temperature, cold-producing medium directly can reduce the temperature of upper cover 21, thus just can significantly improve rate of temperature fall, reduce stand-by period when testing, improve test efficiency.
On the basis of above-described embodiment, particularly, upper cover 21 and base 22 are made by red copper material.The accurate temperature control in order to reach quick, must select suitable material to make testing table 2, simultaneously, because testing table 2 both can as product shelf, also as evaporator, therefore, the heat transmissibility and the flatness that consider material can be needed when selection material; Good heat transmissibility, can make the surface temperature of testing table 2 reach testing requirements in the short period of time, good flatness, can guarantee that components and parts are fitted in testing table 2 surface more closely.
In sum, the material making upper cover 21 and base 22 can have multiple choices, such as: stainless steel, alloy aluminum or red copper, etc.
As the preferred scheme of one, select red copper as the material making upper cover 21, this is because not only flatness is high but also heat transfer is fast compared to other material red copper, even if the configuration of refrigeration system 3 is lower, also can meet the requirement of rapid temperature rise and drop.
On the basis of above-described embodiment, as the preferred scheme of one, particularly, upper cover 21 is welded on base 22 by the mode of vacuum brazing.Compared with other method of attachment, the wettability of vacuum brazing solder and mobility better, can significantly improve the yield rate of soldered product, meanwhile, can not also affect the flatness of upper cover 21.
On the basis of above-described embodiment, particularly, testing table 2 also comprises the fixed head for fixing components and parts to be detected, and fixed head is arranged on upper cover 21.
Conveniently fix components and parts, and avoid user to damage upper cover 21, therefore, upper cover 21 arranges fixed head, when needs carry out environmental test, components and parts are arranged on fixed head.
It should be noted that, fixed head is provided with screw, components and parts to be detected are fixed on fixed head by above-mentioned screw by user; Every platform environment test device is furnished with multiple fixed head, and screwhole diameter on each fixed head, screw spacing are all not identical, thus enabling the components and parts to be detected of user's fixing different types, user can select different fixed heads according to the difference of components and parts to be checked.The material selection alloy aluminum of fixed head, thickness 8 to 10 millimeters.
The connected mode of fixed head and upper cover 21 has a variety of selection, such as: as shown in Figure 3 and Figure 4, be bolted, now need on upper cover 21, arrange multiple threaded hole 211, and this threaded hole 211 is corresponding with the projection 221 on base 22 arranges, to avoid, when using bolted, destroying refrigerant flow path 23.The heat-conducting silicone grease being easy to obtain is scribbled, to strengthen heat-conducting effect between fixed head and upper cover 21.
On the basis of above-described embodiment, particularly, as shown in Figure 5 and Figure 6, refrigeration system 3 comprises the first compressor 31, second compressor 32, first expansion valve 33, second expansion valve 34, condenser 36 and heat interchanger 35; The two ends of refrigerant flow path 23 are all connected by connecting pipe 24 one end with the first compressor 31 and the first expansion valve 33, first compressor 31 is connected with heat interchanger 35 respectively with the other end of the first expansion valve 33, and refrigerant flow path 23, first compressor 31, first expansion valve 33 and heat interchanger 35 form the loop of circulation; Second compressor 32 is connected with heat interchanger 35 respectively with one end of the second expansion valve 34, second compressor 32 is connected with condenser 36 respectively with the other end of the second expansion valve 34, and condenser 36, second expansion valve 34, heat interchanger 35 and the second compressor 32 form the loop of circulation.
For convenience of description, the second compressor 32, second expansion valve 34, condenser 36 and heat interchanger 35 are called first order refrigeration system, the first compressor 31, first expansion valve 33, testing table 2 and heat interchanger 35 are called second level refrigeration system; In above-mentioned refrigeration system 3, heat interchanger 35 is evaporators of first order refrigeration system, it is the condenser 36 of second level refrigeration system simultaneously, inner at heat interchanger 35, the temperature of cold-producing medium in the refrigeration system of the second level can be reduced further, thus reach the object significantly reducing testing table 2 surface temperature.
Two cover refrigeration systems 3 combine by said structure, form dual unit cooling system 3, the minimum temperature that dual unit cooling system 3 of the prior art can reach is about-75 DEG C, and adopt above-mentioned dual unit cooling system 3, then the minimum temperature of system can reach-90 DEG C, and this just expands the usable range of the environment test device that the present embodiment provides.
Due to environmental test chamber of the prior art, in process of the test, need circulating fan to carry out stirring to accelerate heat interchange, fan itself is also a kind of thermal load, and thus it can increase the time required for cooling further; But, in above-mentioned refrigeration system 3, do not utilize circulating fan can reach the object of fast cooling yet.
It should be noted that, in order to access in refrigeration system 3 by testing table 2 easily, therefore, arrange connecting pipe 24 respectively at the two ends of refrigerant flow path 23, two connecting pipes 24 are connected with the first compressor 31 and the first expansion valve 33 respectively.
The material of connecting pipe 24 can have multiple choices, such as: stainless steel, alloy aluminum or red copper, etc.; As a kind of preferred version, the material of connecting pipe 24 selects red copper, this is because, the pipeline of most of refrigeration system 3 is all made up of red copper, if connecting pipe 24 aluminium or stainless steel, due to red copper and aluminium or stainless solder technology unstable, in use, there will be higher failure rate, therefore select red copper to make connecting pipe 24, to overcome above-mentioned technical matters.
On the basis of above-described embodiment, particularly, also comprise the temp measuring system for measuring tempeature, temp measuring system is arranged on the inside of casing 1.
Temp measuring system can measure the temperature of testee, and the temperature of measurement being sent to the control system of environment test device, this measuring tempeature can be presented on guidance panel, operating personnel's measurement of comparison temperature and preset temperature, if measuring tempeature is in preset temperature range, then maintain; If measuring tempeature is higher or lower than preset temperature, then the electric-control system carried by environment test device regulates refrigeration system 3 to adjust temperature automatically.It should be noted that, before on-test, operating personnel need to input test temperature by guidance panel, that is, preset temperature.
Temp measuring system first temperature sensor, the second temperature sensor and three-temperature sensor; wherein; first temperature sensor is for measuring the temperature on upper cover 21 surface; second temperature sensor is for measuring the temperature of components and parts; three-temperature sensor is overtemperature prote sensor; namely; when testing table 2 or components and parts temperature too high or too low time; three-temperature sensor can by overtemperature signal transmission to control system; control system is after receiving overtemperature signal; send alerting signal, with alert, thus the safety of protection test platform 2 and components and parts.
On the basis of above-described embodiment, particularly, also comprise heat-insulation layer, heat-insulation layer is arranged on the madial wall of casing 1, and is positioned at the top of upper cover 21.
The upper cover 21 of testing table 2 forms a test space with the top of casing 1, and the surrounding of this test space is the madial wall of casing 1, and this part madial wall is positioned at the top of upper cover 21, and therefore, heat-insulation layer is arranged on the madial wall of casing 1, and is positioned at the top of upper cover 21.
Arrange heat-insulation layer, can intercept test space and extraneous heat interchange, guarantee in process of the test, the temperature on testing table 2 surface does not run off, thus reduces the energy ezpenditure of refrigeration system 3.
On the basis of above-described embodiment, particularly, as shown in Figure 2, the sidewall of casing 1 is provided with multiple through wires hole 4, through wires hole 4 is positioned at the top of upper cover 21.
When carrying out environmental test, components and parts should be in running order, and components and parts operationally, usually need to consume electric energy and need to test the voltage of components and parts, electric current, power or frequency, now, just need components and parts to be connected with external power source and test instrumentation with cable by wire, therefore, the sidewall of casing 1 arranges through wires hole 4, with the inside facilitating wire and cable to penetrate and pass casing 1.
On the basis of above-described embodiment, particularly, as depicted in figs. 1 and 2, also comprise for making environment test device along the travel mechanism of ground moving, travel mechanism is arranged on the bottom of casing 1.
Conveniently move the environment test device that the present embodiment provides, therefore, travel mechanism is set in the bottom of casing 1.There are multiple choices in travel mechanism, such as: pulley or universal wheel 5, etc.As the preferred scheme of one, universal wheel 5 is selected by travel mechanism, and the quantity of universal wheel 5 is four, is separately positioned on four angles of casing 1 bottom; Universal wheel 5 can realize the rotation of 360 degree, can make this environment test device, when turning, more flexibly.
The performance comparison of the environmental test chamber of the environment test device that following table provides for the present embodiment and prior art, it should be noted that, the data of environment test device listed in table are that the basis based on test of many times draws:
| Comparison point | Prior art | Environment test device |
| Temperature range | -75 to+150 degree | -90 to+150 degree |
| Rate temperature change | 2 degrees/min | 15 degrees/min |
| Temperature deviation | ± 2.0 (national standards) | ±1.0 |
| Temperature fluctuation | ± 1.0 (national standards) | ±0.5 |
| Equipment takes up an area | Greatly | Little |
| Weight of equipment | Greatly (about 800kg) | Little (about 80kg) |
| The type of cooling | Water-cooled | Air-cooled |
| Distribution | 380V | 220V |
| Power consumption | Larger | Very little |
| Mobile | Can not arbitrarily movement | Movement can be facilitated |
| Noise | Greatly | Little |
| Coordinate test | Inconvenient line | Facilitate line |
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (9)
1. an environment test device, is characterized in that, comprising: casing, testing table and refrigeration system, and described testing table and described refrigeration system are all arranged on the inside of described casing; Described refrigeration system is for reducing the surface temperature of described testing table, and described testing table is for placing components and parts;
Described testing table comprises base and upper cover, and described upper cover is arranged on described base, and forms the spatial accommodation for holding cold-producing medium with described base;
Described spatial accommodation is connected with described refrigeration system, and described cold-producing medium can circulate between described spatial accommodation and described refrigeration system; The madial wall level connection joint of described testing table and described casing.
2. environment test device according to claim 1, is characterized in that, described base is provided with refrigerant flow path, and the two ends of described refrigerant flow path are all connected with described refrigeration system, and described cold-producing medium can flow in described refrigerant flow path.
3. environment test device according to claim 1, is characterized in that, described upper cover and described base are made by red copper material.
4. environment test device according to claim 3, is characterized in that, described upper cover is welded on described base by the mode of vacuum brazing.
5. environment test device according to claim 1, is characterized in that, described testing table also comprises the fixed head for fixing components and parts to be detected, described fixed head be arranged on described on cover.
6. environment test device according to claim 2, is characterized in that, described refrigeration system comprises the first compressor, the second compressor, the first expansion valve, the second expansion valve, condenser and heat interchanger;
The two ends of described refrigerant flow path are all connected by connecting pipe one end with described first compressor and described first expansion valve, described first compressor is connected with described heat interchanger respectively with the other end of described first expansion valve, and described refrigerant flow path, described first compressor, described first expansion valve and described heat interchanger form the loop of circulation;
Described second compressor is connected with described heat interchanger respectively with one end of described second expansion valve, described second compressor is connected with described condenser respectively with the other end of described second expansion valve, and described condenser, described second expansion valve, described heat interchanger and described second compressor form the loop of circulation.
7. environment test device according to any one of claim 1-6, is characterized in that, also comprises the temp measuring system for measuring tempeature, and described temp measuring system is arranged on the inside of described casing.
8. the environment test device according to any one of claim 1-6, is characterized in that, also comprises heat-insulation layer, and described heat-insulation layer is arranged on the madial wall of described casing, and is positioned at the top of described upper cover.
9. the environment test device according to any one of claim 1-6, is characterized in that, the sidewall of described casing is provided with multiple through wires hole, and described through wires hole is positioned at the top of described upper cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520508369.3U CN204964347U (en) | 2015-07-14 | 2015-07-14 | Environmental testing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520508369.3U CN204964347U (en) | 2015-07-14 | 2015-07-14 | Environmental testing apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977245A (en) * | 2015-07-14 | 2015-10-14 | 北京瑞尔腾普科技有限公司 | Environmental test device |
| CN108295911A (en) * | 2017-01-12 | 2018-07-20 | 北京长征天民高科技有限公司 | A kind of low temperature environment experimental cabin and its test method |
-
2015
- 2015-07-14 CN CN201520508369.3U patent/CN204964347U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977245A (en) * | 2015-07-14 | 2015-10-14 | 北京瑞尔腾普科技有限公司 | Environmental test device |
| CN108295911A (en) * | 2017-01-12 | 2018-07-20 | 北京长征天民高科技有限公司 | A kind of low temperature environment experimental cabin and its test method |
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| CF01 | Termination of patent right due to non-payment of annual fee |