CN201348414Y - Cooling-supply device for environmental tester - Google Patents

Abstract

A cooling-supply device for an environmental tester belongs to the technical field of reliability test equipment. The environmental tester comprises a test chamber body, and the test chamber body comprises an upper chamber cavity and a working cavity separated from each other through an upper cross beam. The cooling-supply device comprises a liquid nitrogen conveying mechanism, a valve mechanism, a liquid nitrogen ejecting and conveying mechanism, at least an air circulating mechanism, a mechanical refrigerating and coupling mechanism, and an air escaping mechanism, wherein, the liquid nitrogen conveying mechanism is arranged on a top board of the test chamber body and communicated with the upper chamber cavity; the valve mechanism is arranged on the test chamber body and corresponds to the space between the upper chamber cavity and the working cavity; the liquid nitrogen ejecting and conveying mechanism is arranged on the wall of the working cavity and communicated with the working cavity; the air circulating mechanism is mounted at the top part of the test chamber body; the mechanical refrigerating and coupling mechanism is arranged on the test chamber body and communicated with the working cavity; and the air escaping mechanism is arranged on the test chamber body and communicated with the working cavity. The utility model has the advantages that the cooling-supply device can meet the requirements of experiment which needs lower temperature and higher temperature variability or not, and show the energy-saving concept.

Description

The cooling apparatus of environment chambers

Technical field

The utility model belongs to reliability test equipment technology field, is specifically related to a kind of cooling apparatus of environment chambers.

Background technology

The reason of knowing as industry, usually need carry out strict reliability intensifying test for those each electronic product that need work under exceedingly odious environment and all kinds of component of machine and even raw material, the reliability intensifying test is often taken on by corresponding environment chambers.

Environment chambers is that people are used for a kind of instrument of analog equipment environment for use, it can help people to shift to an earlier date the influence degree that Evaluation Environment might produce product, use in advance and ascertain the reason, take measures, prevent trouble before it happens, make product bring into play due function in actual use and guarantee due reliability.

Aforesaid environmental test has surmounted initial purpose far away and has been widely used in comprising the research and development of raw material and product, the various different inspections in the manufacture process, the check before the transportation and the quality control after the transportation, in military affairs and field of aerospace technology, environmental test has important role to the quality that guarantees product especially.Because by strict environmental test, the defective of product or material can expose in advance, thereby, can shorten on the one hand product research and development, make until the cycle of maturation, can stop quality problems in the future on the other hand.Have an example can confirm the importance and the necessity of environmental test, on January 28th, 1986, the U.S. " challenger " number space shuttle is in lift-off blast suddenly after 73 seconds, and 7 astronaut all die on the machine.Afterwards through finding out, because the previous day of space shuttle emission, U.S.'s bust heavy snow, weather cold, a rubber seal parts that causes fuel compartment is because of being unable to bear the test of cold environment.

As environment chambers with comprehensive test, for example for the environment comprehensive testing machine that integrates temperature, humidity and vibration etc., low temperature, cryogenic testing are indispensable, and the refrigerating plant that low temperature, cryogenic testing relied on is selected one in liquid nitrogen refrigerating mechanism or mechanical refrigeration mechanism among both usually.The refrigerating efficiency height of liquid nitrogen refrigerating, can satisfy the low and bigger experimental requirements of warm variability to temperature, but because temperature-fall period and low temperature control or claim the realization of maintenance stage to remain to finish by liquid nitrogen refrigerating, therefore, the energy that consumes in this two stages is bigger, thereby can not embody energy-saving effect.Especially, for those temperature did not need the also little test of very low and warm variability, though can satisfy test requirements document with liquid nitrogen refrigerating, the availability of liquid nitrogen was very low, thereby is a kind of waste really.Certainly, consider, do not need too low and warm variability and little test can adopt mechanical refrigeration to take on fully for aforesaid temperature, and people also can expect naturally from this factor.Yet, though mechanical refrigeration has the lower strong point of power consumption, but trial stretch is narrow, the big test of very low, the warm variability of satisfied temperature, thereby on the scope of application, be restricted, therefore, how to make liquid nitrogen refrigerating with mechanically refrigerated had complementary advantages pay close attention to into industry and for a long time the phase get the technical problem of solution, technical scheme described below produces under this background.

Summary of the invention

Task of the present utility model is to provide a kind of can and can embody the cooling apparatus of the environment chambers of desirable energy-saving effect with the mutual supplement with each other's advantages of liquid nitrogen refrigerating and mechanical refrigeration.

Task of the present utility model is finished like this, a kind of cooling apparatus of environment chambers, described environment chambers comprises the test box body that disposes the nitrogen desiccant body, test box body comprises top box chamber and the working chamber of separating by entablature, described cooling apparatus comprises that a liquid nitrogen that will come from described liquid nitrogen storage tank with outside liquid nitrogen storage tank being used for of connecting is incorporated into the liquid nitrogen conveying mechanism in the described top box chamber, is located on the top board of described test box body and with described top box chamber to communicate; One is used for valve mechanism that the passage between described top box chamber and the described working chamber implement is opened or closed, is located on the test box body and corresponding between top box chamber and the working chamber; One is used for being located on the chamber wall of working chamber, and communicating with working chamber being incorporated into liquid nitrogen in the top box chamber by described liquid nitrogen conveying mechanism to the liquid nitrogen spray feed mechanism of described working chamber spray feed; At least one is used to make gas in top box chamber and the working chamber to form the gas circulation mechanism of circulating reflux, is installed in the top of test box body; One cold air that will come from mechanism's refrigeration unit with outside matched being used for of mechanical refrigeration unit is introduced directly into the mechanical refrigeration connecting mechanism of described working chamber, is located on the described test box body and with working chamber to communicate; One is used for the gas in the described working chamber is caused extraneous disappointing mechanism, is located on the test box body and with described working chamber to communicate.

In a specific embodiment of the present utility model, described liquid nitrogen conveying mechanism comprises the liquid nitrogen inlet tube, first, second, the 3rd magnetic valve, first, second, the 3rd distributing pipe and first, the second nitrogen jet pipe, the liquid nitrogen storage tank of liquid nitrogen inlet tube and described outside is connected, and be fixed on the top board of described test box body, one end and the liquid nitrogen inlet tube of first distributing pipe join, the other end and described nitrogen desiccant body join, one end and the liquid nitrogen inlet tube of second distributing pipe join, the other end is stretched in the described top box chamber and is connected with the first nitrogen jet pipe, one end and the liquid nitrogen inlet tube of the 3rd distributing pipe join, the other end similarly is stretched in the top box chamber and is connected with the second nitrogen jet pipe, first magnetic valve is located on described first distributing pipe, second magnetic valve is located on described second distributing pipe, and the 3rd magnetic valve is located on described the 3rd distributing pipe, spaced apart first spray orifice that is provided with of the length direction of the described first nitrogen jet pipe that is connected with second distributing pipe, and spaced apart second spray orifice that is provided with of the length direction of the described second nitrogen jet pipe that is connected with the 3rd distributing pipe, first, second both keeping parallelisms of nitrogen jet pipe and all with the level setting.

In another specific embodiment of the present utility model, described valve mechanism comprises first rotary cylinder, cam, towing plate, pull bar, one group of dodge gate, an one group of rotating shaft and an air door, first rotary cylinder is located on the described test box body and corresponding to the position, boundary of described top box chamber and working chamber, one end of cam is fixed on the gyroaxis of first rotary cylinder, one client link of the other end and towing plate, the other end of towing plate is connected with pull bar, pull bar is located in the entablature cavity volume of described entablature, one client link of each dodge gate in one group of dodge gate and corresponding rotating shaft, the other end of each rotating shaft is connected with pull bar, the end that air door is positioned at pull bar is connected with pull bar, and constitutes a passage that is used for the liquid nitrogen in top box chamber is incorporated into liquid nitrogen spray feed mechanism between air door and the described liquid nitrogen spray feed mechanism.

Go back in the specific embodiment of the present utility model, described towing plate constitutes one with the end that described cam connects mutually and connects bead, connect at this and to offer sliding tray on bead, described cam is provided with a roller, and this roller cunning fits in the described sliding tray.

In another specific embodiment of the present utility model, described nitrogen spray feed mechanism is located at a side of described working chamber, this nitrogen spray feed mechanism comprises fixedly guiding gutter, adjustable guiding gutter, jet pipe and deflector, fixedly guiding gutter is fixed on the internal chamber wall of a side of described working chamber, and communicate with described passage, the internal chamber wall of adjustable guiding gutter and working chamber connects, and cover is put outside fixing guiding gutter, jet pipe has one group, be spaced apart from each other on adjustable guiding gutter, the nozzle hole of each jet pipe communicates with the nitrogen outlet of described fixedly guiding gutter and communicates with described working chamber, and deflector is bound up on the bottom of adjustable guiding gutter.

In another specific embodiment of the present utility model, the shape of cross section of described adjustable deflector is Ω shape.

More of the present utility model and in specific embodiment, described gas circulation mechanism comprises at least one motor and at least one fan, and motor is fixed on the described top board, and fan is positioned at described top box chamber, is fixedlyed connected with motor by fan shaft.

In of the present utility model and then specific embodiment, described mechanical refrigeration connecting mechanism comprises cold air intake, second rotary cylinder, first air door and cold air interface frame, mating frame, the cold air intake is opened on the described test box body and with described working chamber and communicates, second rotary cylinder is fixed on an end of cold air interface frame, mating frame, first air door is configured in the cold air interface frame, mating frame and with second rotary cylinder and connects, and the cold air interface frame, mating frame is fixed on the cold air intake.

Of the present utility model again more and in specific embodiment, described mechanical refrigeration connecting mechanism also includes one group of block water plate, this group block water plate is arranged in described working chamber and corresponding to the top of described cold air intake.

In again of the present utility model and then specific embodiment, described disappointing mechanism comprises leakage port, the 3rd rotary cylinder, second air door, the 3rd air door and disappointing pipeline interface frame, mating frame, leakage port is opened on the described test box body, the 3rd rotary cylinder is fixed on an end of the pipeline interface frame, mating frame that loses heart, second air door is configured in the pipeline interface frame, mating frame that loses heart and with the 3rd rotary cylinder and connects, the two ends of the 3rd air door and disappointing pipeline interface frame, mating frame are hinged, and corresponding with the air inlet duct of being offered on the disappointing pipeline interface frame, mating frame, lose heart pipeline interface frame, mating frame and leakage port are fixed.

The technical scheme that the utility model disclosed can satisfy the low and big test requirements document of warm variability to temperature, can adapt to again the not little test requirements document of the very low and warm variability of needs of temperature, and can guarantee by mechanical refrigeration connecting structure with mechanical refrigerator set associative knot in cooling and low temperature maintenance stage, thereby can embody the mutual supplement with each other's advantages of liquid nitrogen refrigerating and mechanical refrigeration energy-conservation.

Description of drawings

Fig. 1 is a specific embodiment structure chart of the present utility model.

Fig. 2 is the assembling assumption diagram of mechanical refrigeration connecting mechanism of the present utility model and disappointing mechanism.

The specific embodiment

For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present utility model and beneficial effect more, the applicant general elaborates in conjunction with the accompanying drawings in the mode of embodiment below, but to the description of embodiment all is not restriction to the utility model scheme, any according to the utility model design done only for pro forma but not substantial equivalent transformation all should be considered as the technical solution of the utility model category.

Ask for an interview Fig. 1, provided cooling apparatus as environment chambers, environment chambers comprises being furnished with nitrogen desiccant body 8 with being not limited to, electrical heating mechanism 9 and by the test box body 1 of vibrating mechanism shown in Figure 2 10, be that the boundary has been separated out top box chamber 11 and working chamber 12 with entablature 13 in the case chamber of this test box body 1, be the top that top box chamber 11 is positioned at entablature 13, working chamber 12 is positioned at the bottom of entablature 13, aforesaid nitrogen desiccant body 8 is arranged on the top board 14 of test box body 1, electrical heating mechanism 9 is arranged in the top box chamber 11, and vibrating mechanism 10 is located in the working chamber 12.

Liquid nitrogen conveying mechanism 2 as the cooling apparatus of environment chambers of the present utility model is set on the described top board 14, the support 211 that is not illustrated restriction by quantity as the liquid nitrogen inlet tube 21 of liquid nitrogen conveying mechanism 2 is bearing on the top board 14 and the side that is positioned at top board 14 is illustrated left side, and this liquid nitrogen inlet tube 21 obviously is to be used for outside not shown but be appreciated that fully and the liquid nitrogen storage tank come to realize connects according to general knowledge.On liquid nitrogen inlet tube 21, be linked with an end of first, second, third distributing pipe 25,26,27, wherein, the other end of first distributing pipe 25 is connected to aforesaid nitrogen desiccant body 8, the other end of second distributing pipe 26 is stretched in the top box chamber 11 and with the first nitrogen jet pipe 28 and connects firmly, and the other end of the 3rd distributing pipe 27 similarly is insinuated in the top box chamber 11 and with the second nitrogen jet pipe 29 and connects firmly.Comparatively preferred scheme is: connect a diameter first skirt 261 littler than second distributing pipe 26 on second distributing pipe 26, be stretched in the top box chamber 11 and by this first skirt 261 and connect firmly with the first nitrogen jet pipe 28, with example, on the 3rd distributing pipe 27, connect a diameter second skirt 271 littler, be stretched in the top box chamber 11 and by this second skirt 271 and connect firmly with the second nitrogen jet pipe 29 than the 3rd distributing pipe 27.In order to make first, second skirt 261,271 obtain good location, therefore be equipped with one first protecting pipe 2611 at first skirt 261, be equipped with one second protecting pipe 2711 on second skirt 271, first, second protecting pipe 2611,2711 is all fixing with top board 14.On first distributing pipe 25, be provided with first magnetic valve 22, on second distributing pipe 26, be provided with second magnetic valve 23, on the 3rd distributing pipe 27, be provided with the 3rd magnetic valve 24.When first magnetic valve 22 is opened, just the liquid nitrogen of being introduced by liquid nitrogen inlet tube 21 can be caused nitrogen desiccant body 8 through first distributing pipe 25; When second magnetic valve 23 is opened, just the liquid nitrogen of being introduced by liquid nitrogen inlet tube 21 can be caused the first nitrogen jet pipe 28 through second distributing pipe 26 and first skirt 261, by first spray orifice, 281 ejections of offering at interval on the first nitrogen jet pipe 28; When the 3rd magnetic valve 24 is opened, just the liquid nitrogen of being introduced by liquid nitrogen inlet tube 21 can be caused the second nitrogen jet pipe 29 through the 3rd distributing pipe 27 and second skirt 271, by second spray orifice, 291 ejections of cloth between on the second nitrogen jet pipe 29.Shown in figure, first, second nitrogen jet pipe 28,29 all is provided with and both keeping parallelisms with level ground.If painstakingly increase or reduce the quantity of distributing pipe, for example only adopt one for second, third distributing pipe 26,27, and for example increase distributing pipe again on the basis of second, third distributing pipe 26,27, so this situation should be considered as and technical scheme disclosed in the utility model equivalence fully.

The valve mechanism 3 of the cooling apparatus of the environment chambers of recommending as the utility model is fixed in a side of test box body 1, promptly be fixed at present by the left side of location status shown in the figure and substantially corresponding to an end end of aforesaid entablature 13, more particularly this valve mechanism 3 position on test box body 1 is in the position, boundary of top box chamber 11 and working chamber 12.First rotary cylinder 31 as valve mechanism 3 is fixing with test box body 1, and concrete fixed form does not need to limit in the utility model, for example can directly be screwed, also can be fixing by means of support and test box body 1.Be fixed with an end of cam 32 on the gyroaxis 311 of first rotary cylinder 31, and the other end of cam 32 is installed with a roller 321.One end of towing plate 33 is that illustrated left end and described roller 32 connect, specifically: on towing plate 33, constitute one and connect bead 331, and be processed with a sliding tray 3311 on the bead 331 connecting, scoop out described roller 321 by this sliding tray 3311, that is to say that roller 321 is configured in the sliding tray 3311 by the square.The other end of towing plate 33 is that illustrated right-hand member connects with the left end that can be installed with the pull bar 34 in the entablature cavity volume 131 of entablature 13 with moving back and forth, one end of one group of rotating shaft 36 and one group of dodge gate 35 connect, specifically be that a end with each rotating shaft 36 is inserted in the shaft hole of the end of each dodge gate 35 offering 351, and the other end of each rotating shaft 36 constitutes a crank 361, and crank 361 usefulness crank hold-down screws 3611 connect with pull bar 34.End at pull bar 34 is that illustrated right-hand member similarly connects by rotating shaft 361 and air door 37, and this air door 37 communicates with the following liquid nitrogen spray feed mechanism 4 that is about to describe by passage 371.

The liquid nitrogen spray feed mechanism 4 of the cooling apparatus of the environment chambers of recommending as the utility model is located at a side of working chamber 12, keep corresponding with the following mechanical refrigeration connecting mechanism that also will describe in detail 6, preferably but not the structure of the liquid nitrogen spray feed mechanism 4 that definitely is limited to is as follows: one fixedly guiding gutter 41 fix with the internal chamber wall of working chamber 12, should be fixedly air inlet and the aforesaid passage 371 of guiding gutter 41 corresponding and communicate, also can be understood as aforesaid passage 371 and be the fixedly air inlet of guiding gutter 41.The both sides of the short transverse of the adjustable guiding gutter 42 respectively chamber wall by one group of screw 421 and working chamber 12 connect and cover is put outside fixing guiding gutter 41, the quantity that has provided one group of jet pipe 43 among the figure is three, but obviously be not subjected to illustrated restriction, the nozzle hole 431 of each jet pipe 43 both communicated with the fixing gas outlet 411 of guiding gutter 41, communicate with working chamber 12 again, deflector 44 is being taken on control gate or is being claimed the effect of control valve block, is bound up on the adjustable guiding gutter 42 by lacing film 441.When adjustable guiding gutter 42 moves up (by adjust), and the part of jet pipe 43 guiding gutter 41 that is fixed is covered when promptly retaining covers, then the nitrogen flow of drawing from nozzle hole 431 diminishes, and vice versa.The shape of cross section of aforesaid adjustable guiding gutter 42 is Ω shape.

The gas circulation mechanism 5 of the feeder of the environment chambers of recommending as the utility model is located on the top board 14, motor 51 as this gas circulation mechanism 5 is fixing with top board 14, and be arranged in top box chamber 11 as the fan 52 of this gas circulation mechanism 5, connect by fan shaft 521 and motor 51.As embodiment, the applicant selects a pair of motor 51 and a pair of fan 52, and motor 51 reaches and the quantity of the fan 52 that motor 51 matches if painstakingly increase or reduce, and then obviously still belongs to technical scheme category disclosed in the utility model.

The applicant is described in the above to be the situation of liquid nitrogen refrigerating, by liquid nitrogen conveying mechanism 2 liquid nitrogen is introduced in the top box chamber 11, make at valve mechanism 3 under the state of dodge gate 35 and air door 37 unlatchings, passage 371 by air door 37 draws nitrogen and liquid nitrogen spray feed mechanism 4, fixedly guiding gutter 41 by liquid nitrogen spray feed mechanism 4 causes jet pipe 43, and then spray into working chamber 12 by the nozzle hole 431 of jet pipe 43, the nitrogen that is injected in the working chamber 12 is back to top box chamber 11 under the effect of the fan 52 of gas circulation mechanism 5, and then cause liquid nitrogen spray feed mechanism 4 by passage 371, circulation according to this.Obviously, aforesaid structure extremely is suitable for temperature requirement lower (low temperature) and big place various parts, various electronic product, all kinds of mechanical part and even the raw material in the working chamber 12 of warm variability are carried out low-temperature test.Otherwise, not high for those temperature requirements, temperature rate rate and little aforesaid product, if raw material adopt liquid nitrogen refrigerating to carry out low-temperature test then can cause the unreasonable of the liquid nitrogen energy to expend, do not have and be beneficial to saving experimentation cost, and the temperature maintenance stage after working chamber 12 obtains lowering the temperature and when beginning that working chamber 12 implemented cooling initial temperature-fall period if use liquid nitrogen, can cause so too and waste energy and be unfavorable for saving experimentation cost, therefore, applicant's cold air of also recommending to be able to will to come from the mechanical refrigeration unit with outside mechanical refrigeration unit being used for of being complementary is incorporated into the mechanical refrigeration connecting mechanism 6 of working chamber 12.Known reason, mechanical refrigeration have the low strong point of the fast cost of speed.

Ask for an interview Fig. 2 and still in conjunction with Fig. 1, the structure of the mechanical refrigeration connecting mechanism 6 of the cooling apparatus of the environment chambers of recommending as the utility model is as follows: offer a cold air intake 61 on respect to aforesaid opposite side that liquid nitrogen spray feed mechanism 4 is installed and the chamber wall corresponding to working chamber 12, the cold air intake 61 that provides among the figure be shaped as rectangle, more particularly be rectangle, but it is for example circular not get rid of other shape.One second rotary cylinder 62 has been fixed on an end of cold air interface frame, mating frame 64 by shaft seat 621, and cold air interface frame, mating frame 64 usefulness dog screws and cold air intake 61 are fixing.Here defined cold air interface frame, mating frame 64 is being taken on the effect that the cold air introduction pipe with the mechanical refrigeration unit connects in fact.One end of first air door 63 has a spindle nose 631, this spindle nose 631 is hinged with cold air interface frame, mating frame 64, the other end of first air door 63 and second rotary cylinder 62 connect, that is to say, by be configured in the cold air interface frame, mating frame 64 and implement aforesaid cold air intake 61 is opened or closed with first air door 63 that second rotary cylinder 62 connects.The inwall of working chamber 12 and above corresponding to cold air intake 61 position also be equipped with block water plate 65.

Continue to see Fig. 1 and Fig. 2, the structure of the disappointing mechanism 7 of the cooling apparatus of the environment chambers of recommending as the utility model is as follows: whole disappointing mechanism 7 preferred positions are positioned at the below of mechanical refrigeration connecting mechanism 6, on the wall of the chamber of working chamber 12, offer leakage port 71, leakage port 71 communicates with working chamber 12, on leakage port 71, be screwed the pipeline interface frame, mating frame 75 that loses heart, one the 3rd rotary cylinder 72 is promptly fixed in end lift-launch at the pipeline interface frame, mating frame 75 that loses heart, be located at an end and disappointing pipeline interface frame, mating frame 75 hub settings (the rotatable setting) of second air door 73 in the pipeline interface frame, mating frame 75 that loses heart, the other end then connects with the 3rd rotary cylinder 72, is implemented to open or close by 73 pairs of leakage ports of second air door 72.In addition, in order to help the releasing on a small quantity of gas in the working chamber 12, it is corresponding with the air inlet duct 751 of disappointing pipeline interface frame, mating frame 75 also to be equipped with one the 3rd air door, 74, the three air doors 74 on the pipeline interface frame, mating frame 75 that loses heart.The shape of aforesaid leakage port 71 is not subjected to illustrated restriction equally, for example can be circular leakage port 71, in this case, the tubular body that is shaped as of the pipeline interface frame, mating frame 75 that loses heart, second air door 73 is the disk shape.

The applicant narrates operation principle of the present utility model in conjunction with Fig. 1 and Fig. 2, when will be to those low temperature resistant requirements high and big electronic product, mechanism's parts and even various raw material of warm variability when carrying out low-temperature test, at first with above-mentioned exemplify but be not limited to lift and product and/or raw material place working chamber 12, forward and backward chamber door 15a, the 15b of closing test box body 1 then.Working chamber 12 is being implemented initial temperature-fall period, to introduce working chamber 12 by the cold air that the mechanical refrigeration unit is produced by mechanical refrigeration connecting mechanism 6, specifically be by 62 work of second rotary cylinder, first air door 63 is opened, and the cold air that comes from the mechanical refrigeration unit is incorporated into working chamber 12 through cold air intake 61.Need to prove that the utility model is in advance cold air interface frame, mating frame 64 to be drawn pipeline with the cold air of mechanical refrigeration unit to dock under user mode, the liquid nitrogen inlet tube 21 of liquid nitrogen conveying mechanism 2 draws with the liquid nitrogen of liquid nitrogen storage tank in advance too that pipeline docks.When being incorporated into cold air the working chamber 12 from cold air intake 61 and making the temperature of working chamber 12 be reduced to a certain degree, then close mechanical refrigeration unit, unlatching is located at the valve on the pipeline of liquid nitrogen inlet tube 21, liquid nitrogen is introduced from nitrogen inlet tube 21, through second, the 3rd distributing pipe 26,27 cause first, the second nitrogen jet pipe 28,29, spray simultaneously by first spray orifice 281 of the first nitrogen jet pipe 28 and second spray orifice 291 of the second nitrogen jet pipe 29, enter into top box chamber 11, first magnetic valve 22 on the pipeline of first distributing pipe 25 of this moment is in closed condition, and the opening that exists together of the 3rd magnetic valve 24 on the pipeline of second magnetic valve 23 on the pipeline of second distributing pipe 26 and the 3rd distributing pipe 27.The nitrogen that enters into top box chamber 11 enters liquid nitrogen spray feed mechanism 4 by passage 371 under the unlatching of the dodge gate 35 of valve mechanism 3 and air door 37.The unlatching of dodge gate 35 and air door 37 is achieved like this, at first by 31 work of first rotary cylinder, the gyroaxis 311 that makes first rotary cylinder 31 is to clockwise rotating certain angle, thereby activate towing plate 33 by roller 321 by the cam 32 that is fixed on the gyroaxis 311, and then by towing plate 33 drive pull bars 34, because dodge gate 35 and air door 37 are bound up on the pull bar 34 by rotating shaft 36, therefore make dodge gate 35 and air door 37 deflection certain angles by pull bar 34, promptly deflect at present by state illustrated in figures 1 and 2, this state is top box chamber 11 and working chamber 12, and both are in the state of perforation.Draw from the fixing gas outlet 411 of guiding gutter 41 by the nitrogen that passage 371 is incorporated in the fixing guiding gutter 41, nozzle hole 431 through jet pipe 43 is sprayed onto in the working chamber 12, working chamber 12 is implemented forced refrigeration, and the temperature in making working chamber 12 reaches predetermined cryogenic temperature point.The nitrogen that enters into working chamber 12 is ensured by gas circulation mechanism 5 and refluxes, and specifically is under the motion of fan 52, the nitrogen in the working chamber 12 is drawn back to top box chamber 11, and then caused the 4 realization circulations of liquid nitrogen spray feed mechanism by passage 371, makes the working chamber lowering temperature uniform.As described above, when the temperature in the working chamber 12 has been reduced to set point and need have kept this low-temperature condition, then close second, third magnetic valve 23,24, enable mechanism's refrigeration unit once more, connect aforementioned manner and open first air door 63, make the cold air that comes from the mechanical refrigeration unit cause working chamber 12 from cold air intake 61 once again by second rotary cylinder 62.The exhaust to working chamber 12 after low-temperature test finishes is then taken on by disappointing mechanism 7, specifically is to make 73 unlatchings of second air door by the 3rd rotary cylinder 72, and the gas that comes from leakage port 71 is drawn by the pipeline that connects with disappointing pipeline interface frame, mating frame 75.In said process owing to all used mechanical refrigeration connecting mechanism 6, thereby can save the consumption of liquid nitrogen at the low thermophase of working chamber 12 being implemented initial temperature-fall periods and being kept working chamber 12, embodies energy-conservation, the required cost of reduction low-temperature test.

When low temperature resistant when requiring relatively low and warm variability little electronic product, component of machine and raw material or the like to implement test, so only need enable mechanical refrigeration connecting mechanism 6 to those.

In sum, technical scheme disclosed in the utility model can be with liquid nitrogen refrigerating condenser in the prior art and mechanically refrigerated mutual supplement with each other's advantages, so the advantage of the technical solution of the utility model is ultimate attainment.

Claims (10)

1, a kind of cooling apparatus of environment chambers, described environment chambers comprises the test box body (1) that disposes nitrogen desiccant body (8), test box body (1) comprises top box chamber (11) and the working chamber of separating by entablature (13) (12), it is characterized in that described cooling apparatus comprises that a liquid nitrogen that will come from described liquid nitrogen storage tank with outside liquid nitrogen storage tank being used for of connecting is incorporated into the liquid nitrogen conveying mechanism (2) in the described top box chamber (11), the top board (14) that is located at described test box body (1) is gone up and is communicated with described top box chamber (11); One is used for valve mechanism (3) that the passage between described top box chamber (11) and the described working chamber (12) implement is opened or closed, is located on the test box body and corresponding between top box chamber (11) and the working chamber (12); One is used for being located on the chamber wall of working chamber (12), and communicating with working chamber (12) be incorporated into the liquid nitrogen spray feed mechanism (4) of the interior liquid nitrogen in top box chamber (11) to described working chamber (12) spray feed by described liquid nitrogen conveying mechanism (2); At least one is used to make top box chamber (11) and the gas in the working chamber (12) to form the gas circulation mechanism (5) of circulating reflux, is installed in the top of test box body (1); One cold air that will come from mechanism's refrigeration unit with outside matched being used for of mechanical refrigeration unit is introduced directly into the mechanical refrigeration connecting mechanism (6) of described working chamber (12), is located at described test box body (1) and goes up and communicate with working chamber (12); One is used for the gas in the described working chamber (12) is caused extraneous disappointing mechanism (7), is located at test box body (1) and upward and with described working chamber (12) communicates.

2, the cooling apparatus of environment chambers according to claim 1, it is characterized in that described liquid nitrogen conveying mechanism (2) comprises liquid nitrogen inlet tube (21), first, second, the 3rd magnetic valve (22,23,24), first, second, the 3rd distributing pipe (25,26,27) and first, the second nitrogen jet pipe (28,29), liquid nitrogen inlet tube (21) is connected with the liquid nitrogen storage tank of described outside, and be fixed on the top board (14) of described test box body (1), one end of first distributing pipe (25) and liquid nitrogen inlet tube (21) join, the other end and described nitrogen desiccant body (8) join, one end of second distributing pipe (26) and liquid nitrogen inlet tube (21) join, the other end is stretched in the described top box chamber (11) and is connected with the first nitrogen jet pipe (28), one end of the 3rd distributing pipe (27) and liquid nitrogen inlet tube (21) join, the other end similarly is stretched in the top box chamber (11) and is connected with the second nitrogen jet pipe (29), first magnetic valve (22) is located on described first distributing pipe (25), second magnetic valve (23) is located on described second distributing pipe (26), and the 3rd magnetic valve (24) is located on described the 3rd distributing pipe (27), spaced apart first spray orifice (281) that is provided with of the length direction of the described first nitrogen jet pipe (28) that is connected with second distributing pipe (26), and spaced apart second spray orifice (291) that is provided with of the length direction of the described second nitrogen jet pipe (29) that is connected with the 3rd distributing pipe (27), first, the second nitrogen jet pipe (28,29) both keeping parallelisms and all with the level setting.

3, the cooling apparatus of environment chambers according to claim 1, it is characterized in that described valve mechanism (3) comprises first rotary cylinder (31), cam (32), towing plate (33), pull bar (34), one group of dodge gate (35), an one group of rotating shaft (36) and an air door (37), the described test box body (1) that is located at first rotary cylinder (31) goes up and corresponding to the boundary position of described top box chamber (11) with working chamber (12), one end of cam (32) is fixed on the gyroaxis (311) of first rotary cylinder (31), one client link of the other end and towing plate (33), the other end of towing plate (33) is connected with pull bar (34), pull bar (34) is located in the entablature cavity volume (131) of described entablature (13), one client link of each dodge gate (35) in one group of dodge gate (35) and corresponding rotating shaft (36), the other end of each rotating shaft (36) is connected with pull bar (34), the end that air door (37) is positioned at pull bar (34) is connected with pull bar (34), and constitutes a passage (371) that is used for the liquid nitrogen of top box chamber (11) is incorporated into liquid nitrogen spray feed mechanism (4) between air door (37) and the described liquid nitrogen spray feed mechanism (4).

4, the cooling apparatus of environment chambers according to claim 3, it is characterized in that a end that described towing plate (37) and described cam (32) connect mutually constitutes one and connects bead (331), connect at this and to offer sliding tray (3311) on bead (331), described cam (32) is provided with a roller (321), and this roller (321) is sliding to be fitted in the described sliding tray (3311).

5, the cooling apparatus of environment chambers according to claim 3, it is characterized in that described nitrogen spray feed mechanism (4) is located at a side of described working chamber (12), this nitrogen spray feed mechanism (4) comprises fixedly guiding gutter (41), adjustable guiding gutter (42), jet pipe (43) and deflector (44), fixedly guiding gutter (41) is fixed on the internal chamber wall of a side of described working chamber (12), and communicate with described passage (371), adjustable guiding gutter (42) connects with the internal chamber wall of working chamber (12), and cover is put outside fixing guiding gutter (41), jet pipe (43) has one group, be spaced apart from each other on adjustable guiding gutter (41), the nozzle hole (431) of each jet pipe (43) communicates with the nitrogen outlet (411) of described fixedly guiding gutter (41) and communicates with described working chamber (12), and deflector (44) is bound up on the bottom of adjustable guiding gutter (42).

6, the cooling apparatus of environment chambers according to claim 5 is characterized in that the shape of cross section of described adjustable deflector (42) is Ω shape.

7, the cooling apparatus of environment chambers according to claim 1, it is characterized in that described gas circulation mechanism (5) comprises at least one motor (51) and at least one fan (52), motor (51) is fixed on the described top board (14), fan (52) is positioned at described top box chamber (11), is fixedlyed connected with motor (51) by fan shaft (521).

8, the cooling apparatus of environment chambers according to claim 1, it is characterized in that described mechanical refrigeration connecting mechanism (6) comprises cold air intake (61), second rotary cylinder (62), first air door (63) and cold air interface frame, mating frame (64), the described test box body (1) that is opened in cold air intake (61) goes up and communicates with described working chamber (12), second rotary cylinder (62) is fixed on an end of cold air interface frame, mating frame (64), first air door (63) is configured in the cold air interface frame, mating frame (64) and with second rotary cylinder (62) and connects, and cold air interface frame, mating frame (64) is fixed on the cold air intake (61).

9, the cooling apparatus of environment chambers according to claim 8, it is characterized in that described mechanical refrigeration connecting mechanism (6) also includes one group of block water plate (65), this group block water plate (65) is arranged in described working chamber (12) and corresponding to the top of described cold air intake (61).

10, the cooling apparatus of environment chambers according to claim 1, it is characterized in that described disappointing mechanism (7) comprises leakage port (71), the 3rd rotary cylinder (72), second air door (73), the 3rd air door (74) and disappointing pipeline interface frame, mating frame (75), leakage port (71) is opened on the described test box body (1), the 3rd rotary cylinder (72) is fixed on an end of the pipeline interface frame, mating frame (75) that loses heart, second air door (73) is configured in that (720 connect in the pipeline interface frame, mating frame (75) that loses heart and with the 3rd rotary cylinder, the two ends of the 3rd air door (74) and disappointing pipeline interface frame, mating frame (75) are hinged, and corresponding with the air inlet duct of being offered on the disappointing pipeline interface frame, mating frame (75) (751), the pipeline interface frame, mating frame (75) that loses heart is fixing with leakage port (71).

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