CN204952922U - High low temperature test box that can dehumidify in succession under low temperature working condition - Google Patents
High low temperature test box that can dehumidify in succession under low temperature working condition Download PDFInfo
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- CN204952922U CN204952922U CN201520260850.5U CN201520260850U CN204952922U CN 204952922 U CN204952922 U CN 204952922U CN 201520260850 U CN201520260850 U CN 201520260850U CN 204952922 U CN204952922 U CN 204952922U
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- low temperature
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- evaporimeter
- temperature test
- test chamber
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Abstract
The utility model discloses a high low temperature test box that can dehumidify in succession under low temperature working condition. This high low temperature test box has adopted independent pair of wind channel, the structure of arranging an evaporimeter in every independent wind channel, and the solenoid valve that sets up the some is used for switching over the flow through priority order of two evaporimeters of refrigerant, accomplishes the combination transform of refrigeration function defrosting function, sets up the blast gate simultaneously in two independent wind channels respectively for control every wind channel and interior spatial join of proof box or wall, accomplish the switching in wind channel. The system of two evaporator assembly one -tenth accomplishes " refrigeration - defrosting, refrigeration - refrigeration, defrosting - refrigeration " three kinds of modes in proper order, and these three kinds of modes constitute a circulation, and the time that lasts according to low temperature working condition constantly repeats. So, just enable high low temperature test box and accomplish the water capacity that the cryogenic while successively got rid of the incasement under low temperature working condition, reduce the hygrometry of incasement air, can avoid the unable shortcoming of dehumidification in succession of conventional high low temperature test box low temperature working condition.
Description
Technical field
The present invention relates generally to the high-low temperature test chamber in environmental simulation test technical field, relates to dehumidifying technology.
Background technology
Dehumidifying technology occupies an important position in modern environment modelling technique field.Environmental test technology is a practical basic technology, is one of important technique measure of stabilizing and increasing tested products quality.Its main task is the impact that research environment stress produces properties of product, solves product at storage, transport or the integrity problem in using.Wherein thermal cycling test is the common test type of environmental test technology mesoclimate class test, because the change of test the temperature inside the box, humidity environment may cause dew condensation phenomenon during test, this phenomenon often appears at temperature, humidity changes violent low temperature and turns the worst hot case stage, many electronic products cause the acceleration chemical reaction of thermal control coating surface metal oxidization or electrochemical corrosion because affected by condensation water droplet, the functional destructions such as electrical insulation properties reduction, even short circuit.For reducing even to avoid the adverse effect brought that condenses, the high-low temperature test chamber of low humidity need be adopted.
The high-low temperature test chamber of tradition low humidity divides two kinds: 1, additional dehumidification system for runner; 2, front-packed evaporator structure.
To be high-low temperature chamber be connected with independently a set of dehumidifier additional dehumidification system for runner, utilizes absorption method to remove the water capacity being constantly filled with humid air in chamber, and then reduce relative humidity in case, reduce dew-point temperature, reduce even to avoid dew condensation phenomenon.This kind of structure needs to complete desorption aqueous vapor within a certain period of time, cannot adsorb in worst cold case long-time continuous, and system bulky complex, cost drops into larger.
Front-packed evaporator structure adds one section of heat exchanger (i.e. front-packed evaporator) in the evaporimeter front end of high-low temperature chamber, first this section of heat exchanger is flowed through after utilizing cold-producing medium throttling, make this section of evaporator temperature minimum, make water in air gas major part condense in its surperficial Cheng Shuan, reduce water capacity and relative humidity in case at the worst cold case initial stage.But front-packed evaporator is the function of non-brake method due to its dehumidifying, and heat exchange area need be significantly less than cooling evaporimeter just can guarantee that cold-producing medium is liquid state and possesses certain degree of supercooling before the cooling evaporimeter of inflow.Therefore, only can remove water capacity at the worst cold case initial stage, along with heat exchanger surface frost layer accumulation dehumidifying effect is tending towards saturated, and due to front-packed evaporator need with circulating air contact heat-exchanging, need be arranged in chamber air channel, frost layer heat absorption on front-packed evaporator when turning worst hot case, except fraction water discharges casing outside with liquid state, major part water direct gasification comes back in circulating air, then increases case inner circulating air water capacity and relative humidity, improves dew-point temperature.Therefore, the effect on moisture extraction of this structure is undesirable, dew condensation phenomenon when cannot effectively avoid low temperature to turn worst hot case.
Summary of the invention
The object of the present invention is to provide a kind of can the high-low temperature test chamber of continuous dehumidifying under worst cold case, the water capacity in case is successively removed while can completing refrigeration under worst cold case, reduce the relative humidity of air in case, can avoid conventional high-low temperature test chamber worst cold case cannot the shortcoming of continuous dehumidifying.
The present invention relates to a kind of can the high-low temperature test chamber of continuous dehumidifying under worst cold case, the opening and closing period being provided with independently 2, two air channels in air channel 1 and air channel in chamber is contrary; Be provided with the first evaporimeter in air channel 1, in air channel 2, be provided with the second evaporimeter.
Wherein, air channel 1 is surrounded successively by the first air inlet valve, the first air-duct clapboard, the second air returning valve and tank wall, and described air channel 2 is surrounded successively by the second air inlet valve, the second air-duct clapboard, the first air returning valve and tank wall; The outlet of described first evaporimeter connects compressor by the 7th magnetic valve, the outlet of described second evaporimeter connects compressor by the first magnetic valve, the opposite side of compressor connects condenser, reservoir is connected on the downside of condenser, connect device for drying and filtering on the right side of reservoir, device for drying and filtering passes on left the second electric expansion valve is connected the first evaporimeter import with the second check valve; Device for drying and filtering passes on left the first electric expansion valve is connected the second evaporimeter import with the first check valve.
The second temperature sensor, the first blower fan, the first electric heater and the second water leg is also provided with, the second row water pipe outside the second water leg connect box in air channel 1; Three-temperature sensor, the second blower fan, the second electric heater and the first water leg is also provided with, the first row water pipe outside the first water leg connect box in air channel 2.
Chamber is provided with test chamber door, described test chamber door has observation window.
In addition, the first temperature sensor and humidity sensor is also provided with in chamber.Wherein, described humidity sensor is capacitance type sensor.
The present invention changes traditional high-low temperature test chamber dehumidification mode.Adopt a kind of can the high-low temperature test chamber of continuous dehumidifying under worst cold case, have following some:
1) " refrigeration-defrosting " and " defrosting-refrigeration " pattern of chamber is middle adds " refrigeration-refrigeration " pattern, make to treat air in cooling air duct before the handover temperature reached worst cold case target temperature, there is the advantage that in the handoff procedure of air channel, circulating air temperature fluctuation degree is little.
2) can defrost continuously, solve the problem that low temperature turns product condensation in pyroprocess.
3) enter condenser again after using compressor outlet high-temperature high-pressure refrigerant steam first to defrost, save the energy of defrosting.
Accompanying drawing explanation
Fig. 1 be the utility model preferred embodiment can the schematic diagram of high-low temperature test chamber of continuous dehumidifying under worst cold case.
Fig. 2 is refrigeration circuit schematic diagram in the utility model preferred embodiment.
In figure: compressor 1, condenser 2, reservoir 3, device for drying and filtering 4, first evaporimeter 5, second evaporimeter 6, first electric expansion valve 7, second electric expansion valve 8, first magnetic valve 9
1, the second magnetic valve 9
2, the 3rd magnetic valve 9
3, the 4th magnetic valve 9
4, the 5th magnetic valve 9
5, the 6th magnetic valve 9
6, the 7th magnetic valve 9
7, first check valve 10, second check valve 11, first electric heater 12, second electric heater 21, first blower fan 13, second blower fan 20, first air inlet valve 14, second air inlet valve 19, first temperature sensor 15, second temperature sensor 30, three-temperature sensor 32, humidity sensor 16, observation window 17, test chamber door 18, first water leg 22, second water leg 26, first row water pipe 23, second row water pipe 27, first air returning valve 24, second air returning valve 25, first air-duct clapboard 28, second air-duct clapboard 29, tank wall 31.
Detailed description of the invention
What Figure 1 shows that the utility model preferred embodiment can the schematic diagram of high-low temperature test chamber of continuous dehumidifying under worst cold case.Independently air channel 1 and air channel 2 is provided with in described high-low temperature test chamber, and refrigeration circuit; The opening and closing period in described two air channels is contrary; Described refrigeration circuit is provided with the first evaporimeter 5 and the second evaporimeter 6, and described first evaporimeter 5 is placed in described air channel 1, and described second evaporimeter 6 is placed in air channel 2.
See Fig. 2, in the present embodiment, described refrigeration circuit is specially: the outlet of described first evaporimeter [5] is by the 7th magnetic valve [9
7] connecting compressor [1], the outlet of described second evaporimeter [6] is by the first magnetic valve [9
1] connect compressor [1], the opposite side of compressor [1] connects condenser [2], condenser [2] downside connects reservoir [3], reservoir [3] right side connects device for drying and filtering [4], and device for drying and filtering [4] passes on left the second electric expansion valve [8] is connected the first evaporimeter [5] import with the second check valve [11]; Device for drying and filtering [4] passes on left the first electric expansion valve [7] is connected the second evaporimeter [6] import with the first check valve [10].
High-low temperature test chamber of the present utility model is different from traditional thermocycling box structure, adopt two evaporation structures, two evaporimeters arrange independently air channel respectively, and the opening and closing period in two air channels is contrary, and the moment ensures refrigerating evaporator and case Inner eycle airflow connection.The refrigeration circuit be made up of two evaporimeters completes successively " refrigeration-defrosting, refrigeration-refrigeration, defrosting-refrigeration " Three models, this Three models forms a circulation, and the time lasting according to worst cold case constantly repeats.That is: this technology is under " refrigeration-defrosting " pattern, by controlling refrigeration circuit magnetic valve break-make and regulating electronic expansion valve opening, evaporator refrigeration in the air channel, side making connection case inner circulating air, simultaneously evaporator defrost in the air channel that cuts off of opposite side and case inner circulating air; After running certain hour, now refrigerating evaporator frosting reaches certain thickness, enter " refrigeration-refrigeration " pattern, now the air-valve in air channel does not switch, only switch refrigeration circuit magnetic valve makes two evaporimeters freeze simultaneously, and by regulating electronic expansion valve opening to increase refrigerant flow, until the air themperature in original defrosting duct reaches the target temperature of worst cold case; Now switch the air-valve in air channel, refrigeration circuit magnetic valve regulate electromagnetic expanding valve aperture simultaneously, enter " defrosting-refrigeration " pattern, previously for the evaporimeter that freezes now for defrosting, and for the evaporimeter that defrosts now for refrigeration.So, while high-low temperature test chamber just can be made under worst cold case to complete refrigeration, successively remove the water capacity in case, reduce the relative humidity of air in case, can avoid conventional high-low temperature test chamber worst cold case cannot the shortcoming of continuous dehumidifying.
See Fig. 1, preferably, described air channel 1 is divided into by the first air inlet valve 14, first air-duct clapboard 28, second air returning valve 25 and tank wall 31, and described air channel 2 is divided into by the second air inlet valve 19, second air-duct clapboard 29, first air returning valve 24 and tank wall 31.
See Fig. 1, preferably, the second row water pipe 27 outside the second temperature sensor 30, first blower fan 13, first electric heater 12 and the second water leg 26, second water leg 26 connect box is also provided with in air channel 1; The first row water pipe 23 outside three-temperature sensor 32, second blower fan 20, second electric heater 21 and the first water leg 22, the first water leg 22 connect box is also provided with in air channel 2.
See Fig. 1, preferably, described high-low temperature test chamber is provided with test chamber door 18, described test chamber door 18 has observation window [17].In addition, the first temperature sensor 15 and humidity sensor 16 is also provided with in chamber.Wherein, described humidity sensor 16 is capacitance type sensor.
The high-low temperature test chamber operation principle of the present embodiment is: during " refrigeration-defrosting " pattern, the first evaporimeter 5 freezes, and the second evaporimeter 6 defrosts; First air inlet valve 14 in air channel 1 and the second air returning valve 25 are opened, second air inlet valve 19 in air channel 2 and the first air returning valve 24 are closed, first heat release defrosting is carried out through the second evaporimeter 6 from the refrigerant gas of the HTHP of compressor 1 discharge, after through condenser 2 condensation, again through reservoir 3, device for drying and filtering 4, through electronics second electric expansion valve 8(now flow-control export be 50%) enter sweat cooling in the first evaporimeter 5, finally by the 7th magnetic valve 9
7get back to compressor 1.The water that second evaporimeter 6 defrosts is collected by the second water leg 26, then discharges case from second row water pipe 27.This process second magnetic valve 9
2, the 3rd magnetic valve 9
3, the 7th magnetic valve 9
7open (50% aperture) with the second electric expansion valve 8, the first magnetic valve 9
1, the 4th magnetic valve 9
4, the 5th magnetic valve 9
5, the 6th magnetic valve 9
6close (0% aperture) with the first electric expansion valve 7.After " refrigeration-defrosting " pattern setting-up time arrives, the first evaporimeter 5 frosting acquires a certain degree, and enters " refrigeration-refrigeration " pattern.Now, the 3rd magnetic valve 9
3, the 5th magnetic valve 9
5close, the 4th magnetic valve 9
4open, first electric expansion valve 7 and the second electric expansion valve 8 are opened (being 100% aperture) simultaneously, cold-producing medium, after compressor 1, condenser 2, reservoir 3, device for drying and filtering 4, enters the first evaporimeter 5, second evaporimeter 6 simultaneously and synchronously freezes, then through the first magnetic valve 9
1, the 7th magnetic valve 9
7conflux as compressor 1.Because cooling evaporimeter parallel heat exchanging area doubles under this pattern, electronic expansion valve opening increases by 1 times, ensure that together with the refrigerating capacity in air channel in case constant, maintains the constant of worst cold case temperature with this." refrigeration-refrigeration " pattern proceed to the first temperature sensor 15, second temperature sensor 30, three-temperature sensor 32 numerical value in tolerance time (be generally ± 2 DEG C), enter " defrosting-refrigeration " pattern, first evaporimeter 5 defrosts, and the second evaporimeter 6 freezes; Now, open the second air inlet valve 19 and the first air returning valve 24, close the first air inlet valve 14 and the second air returning valve 25.Second magnetic valve 9
2, the 3rd magnetic valve 9
3, the 7th magnetic valve 9
7, the 4th magnetic valve 9
4close (0% aperture) with the second electric expansion valve 8, the first magnetic valve 9
1, the 5th magnetic valve 9
5, the 6th magnetic valve 9
6open (50% aperture) with the first electric expansion valve 7.The refrigerant gas of HTHP of discharging from compressor 1 is through the 5th magnetic valve 9
5enter defrosting first evaporimeter 5 and carry out heat release defrosting, by the 6th magnetic valve 9
6enter condenser 2 condensation, then through reservoir 3, device for drying and filtering 4, enter sweat cooling in the second evaporimeter 6 through the first electric expansion valve 7, through the first magnetic valve 9
1get back to compressor 1.The water that first evaporimeter 5 defrosts is collected by the first water leg 22, then discharges case from first row water pipe 23.
So complete the reciprocation cycle of " refrigeration-defrosting, refrigeration-refrigeration, defrosting-refrigeration ", the continuous dehumidifying that can realize in high-low temperature test chamber simultaneously can by the temperature inside the box undulated control of worst cold case in less tolerance.
Claims (7)
1. can the high-low temperature test chamber of continuous dehumidifying under worst cold case, it is characterized in that, the opening and closing period being provided with independently 2, two air channels in air channel 1 and air channel in chamber is contrary; Be provided with the first evaporimeter (5) in air channel 1, in air channel 2, be provided with the second evaporimeter (6).
2. according to claim 1 a kind of can the high-low temperature test chamber of continuous dehumidifying under worst cold case, it is characterized in that, the outlet of described first evaporimeter (5) is by the 7th magnetic valve (9
7) connecting compressor (1), the outlet of described second evaporimeter (6) is by the first magnetic valve (9
1) connect compressor (1), the opposite side of compressor (1) connects condenser (2), condenser (2) downside connects reservoir (3), reservoir (3) right side connects device for drying and filtering (4), and device for drying and filtering (4) passes on left the second electric expansion valve (8) is connected the first evaporimeter (5) import with the second check valve (11); Device for drying and filtering (4) passes on left the first electric expansion valve (7) is connected the second evaporimeter (6) import with the first check valve (10).
3. according to claim 1 a kind of can the high-low temperature test chamber of continuous dehumidifying under worst cold case, it is characterized in that, described air channel 1 is divided into by the first air inlet valve (14), the first air-duct clapboard (28), the second air returning valve (25) and tank wall (31), and described air channel 2 is divided into by the second air inlet valve (19), the second air-duct clapboard (29), the first air returning valve (24) and tank wall (31).
4. according to claim 1 a kind of can the high-low temperature test chamber of continuous dehumidifying under worst cold case, it is characterized in that, the second temperature sensor (30), the first blower fan (13), the first electric heater (12) and the second water leg (26) is also provided with, the second row water pipe (27) outside the second water leg (26) connect box in air channel 1; Three-temperature sensor (32), the second blower fan (20), the second electric heater (21) and the first water leg (22) is also provided with, the first row water pipe (23) outside the first water leg (22) connect box in air channel 2.
5. according to claim 1 a kind of can the high-low temperature test chamber of continuous dehumidifying under worst cold case, it is characterized in that, chamber is provided with test chamber door (18), described test chamber door (18) has observation window (17).
6. according to claim 1 a kind of can the high-low temperature test chamber of continuous dehumidifying under worst cold case, it is characterized in that, in chamber, be also provided with the first temperature sensor (15) and humidity sensor (16).
7. according to claim 6 a kind of can the high-low temperature test chamber of continuous dehumidifying under worst cold case, it is characterized in that, described humidity sensor (16) is capacitance type sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520260850.5U CN204952922U (en) | 2015-04-28 | 2015-04-28 | High low temperature test box that can dehumidify in succession under low temperature working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520260850.5U CN204952922U (en) | 2015-04-28 | 2015-04-28 | High low temperature test box that can dehumidify in succession under low temperature working condition |
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| Publication Number | Publication Date |
|---|---|
| CN204952922U true CN204952922U (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520260850.5U Expired - Fee Related CN204952922U (en) | 2015-04-28 | 2015-04-28 | High low temperature test box that can dehumidify in succession under low temperature working condition |
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| CN (1) | CN204952922U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910175A (en) * | 2016-04-29 | 2016-08-31 | 珠海格力电器股份有限公司 | Air conditioner indoor unit, air conditioner unit and control method of air conditioner unit |
| CN109701670A (en) * | 2019-02-01 | 2019-05-03 | 北京库蓝科技有限公司 | Program-controlled formula precision growth cabinet |
| CN111442913A (en) * | 2020-03-30 | 2020-07-24 | 麦格思维特(上海)流体工程有限公司 | High-pressure hydrogen fatigue test environment cabin for workpiece |
| CN113533982A (en) * | 2021-09-15 | 2021-10-22 | 江苏拓米洛环境试验设备有限公司 | Power battery test equipment and defrosting method |
-
2015
- 2015-04-28 CN CN201520260850.5U patent/CN204952922U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910175A (en) * | 2016-04-29 | 2016-08-31 | 珠海格力电器股份有限公司 | Air conditioner indoor unit, air conditioner unit and control method of air conditioner unit |
| CN105910175B (en) * | 2016-04-29 | 2019-03-26 | 珠海格力电器股份有限公司 | The control method of air conditioner indoor unit, air-conditioner set and air-conditioner set |
| CN109701670A (en) * | 2019-02-01 | 2019-05-03 | 北京库蓝科技有限公司 | Program-controlled formula precision growth cabinet |
| CN111442913A (en) * | 2020-03-30 | 2020-07-24 | 麦格思维特(上海)流体工程有限公司 | High-pressure hydrogen fatigue test environment cabin for workpiece |
| CN113533982A (en) * | 2021-09-15 | 2021-10-22 | 江苏拓米洛环境试验设备有限公司 | Power battery test equipment and defrosting method |
| CN113533982B (en) * | 2021-09-15 | 2021-12-28 | 江苏拓米洛环境试验设备有限公司 | Power battery test equipment and defrosting method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160113 Termination date: 20200428 |