阅读说明：本技术 一种高低温试验箱 (High-low temperature test box ) 是由 谭志刚 于 2021-01-25 设计创作，主要内容包括：本发明涉及一种高低温试验箱,包括底座、固定在底座上的箱体以及固定在箱体侧壁上的控制箱,箱体内设置有多个用于升温的加热装置、多个用于降温的制冷装置以及用于热量交换的风力循环装置。箱体内设置有可转动的置物托板,加热装置上设置有转动座,转动座安装在箱体的内壁上,制冷装置包括蒸发器以及液氮制冷系统,蒸发器与箱体的内壁固定连接且设置在置物托板的上方。控制箱内设置有单片机,单片机分别与转动座、加热装置以及制冷装置控制连接。通过在箱体内设置转动的置物托板,加上可转动的加热装置,从而使得产品在升温过程中,其各个面都能受热均匀,并且液氮制冷系统与蒸发器能够进行快速制冷,提高了试验结果的准确性。(The invention relates to a high-low temperature test box which comprises a base, a box body fixed on the base and a control box fixed on the side wall of the box body, wherein a plurality of heating devices for heating, a plurality of refrigerating devices for cooling and a wind power circulating device for heat exchange are arranged in the box body. The box is internally provided with a rotatable article holding support plate, the heating device is provided with a rotating seat, the rotating seat is installed on the inner wall of the box, the refrigerating device comprises an evaporator and a liquid nitrogen refrigerating system, and the evaporator is fixedly connected with the inner wall of the box and arranged above the article holding support plate. The control box is internally provided with a singlechip which is respectively connected with the rotating seat, the heating device and the refrigerating device in a control way. Through set up the pivoted in the box and put the thing layer board, including rotatable heating device to make the product at the intensification in-process, its each side can both be heated evenly, and liquid nitrogen refrigerating system can refrigerate fast with the evaporimeter, has improved the accuracy of test result.)

1. A high low temperature test chamber which characterized in that: the device comprises a base (1), a box body (11) fixed on the base (1) and a control box (2) fixed on the side wall of the box body (11), wherein a plurality of heating devices (3) used for heating, a plurality of refrigerating devices used for cooling and a wind power circulating device (4) used for heat exchange are arranged in the box body (11);

a rotatable object placing supporting plate (5) is arranged in the box body (11), a rotating seat (31) is arranged on the heating device (3), the rotating seat (31) is installed on the inner wall of the box body (11), the refrigerating device comprises an evaporator (6) and a liquid nitrogen refrigerating system (7), and the evaporator (6) is fixedly connected with the inner wall of the box body (11) and is arranged above the object placing supporting plate (5);

a single chip microcomputer (21) is arranged in the control box (2), and the single chip microcomputer (21) is respectively in control connection with the rotating seat (31), the heating device (3) and the refrigerating device.

2. A high-low temperature test chamber according to claim 1, wherein: the heating device (3) comprises a mounting shaft (32), a light-gathering cover (33) in an arc shape and a heating bulb (34), one end of the mounting shaft (32) is rotatably connected to the rotating seat (31), and the other end of the mounting shaft is fixedly connected with a convex surface of the light-gathering cover (33);

the heating bulb (34) is installed at the center of the concave surface of the light-gathering cover (33), the concave surface of the light-gathering cover (33) faces the object placing support plate (5), and the heating bulb (34) is electrically connected with the single chip microcomputer (21).

3. A high-low temperature test chamber according to claim 2, wherein: the heating devices (3) are four in configuration, the box body (11) is cuboid, and the four heating devices (3) are respectively and rotatably arranged on four surfaces of the inner wall of the box body (11) through rotating seats (31).

4. A high-low temperature test chamber according to claim 1, wherein: fixedly connected with step motor (8) in base (1), the coaxial fixedly connected with dwang (81) of output shaft of step motor (8), dwang (81) are kept away from the one end of step motor (8) is passed box (11) with put thing layer board (5) perpendicular fixed connection, the joint has bearing frame (82) on box (11), dwang (81) cup joint in the inner circle of bearing frame (82).

5. A high-low temperature test chamber according to claim 1, wherein: the liquid nitrogen refrigeration system (7) comprises a liquid nitrogen tank (71), a cold insulation pipeline (72), a pressure pump (73) and an electromagnetic valve (74), wherein a base layer (12) is arranged at the bottom of the box body (11), and one surface, far away from the bottom, of the base layer (12) is provided with a plurality of sequentially communicated annular grooves (13);

liquid nitrogen container (71) are fixed in control box (2), separate cold pipeline (72) and set up on liquid nitrogen container (71) and one end extends to bottom in liquid nitrogen container (71), separate the other end of cold pipeline (72) and pass box (11) with the bottom intercommunication of one of them annular groove (13), force pump (73) with solenoid valve (74) are installed separate cold pipeline (72) on and with singlechip (21) electricity is connected.

6. A high-low temperature test chamber according to claim 5, wherein: a liquid collecting box (14) is fixedly connected in the base (1), a ventilating pipe (15) is installed on the liquid collecting box (14), a ventilating valve (16) is arranged on the ventilating pipe (15), and one end, far away from the liquid collecting box (14), of the ventilating pipe (15) penetrates through the box body (11) and the base layer (12) and then is communicated with the annular groove (13).

7. A high-low temperature test chamber according to claim 1, wherein: one side of box (11) be provided with sealing door (17) that box (11) are connected, be provided with visual window (18) that are used for observing the product in the cavity on sealing door (17).

8. A high-low temperature test chamber according to claim 1, wherein: install touch-control display screen (22) on the lateral wall of control box (2), touch-control display screen (22) with singlechip (21) electric connection, control box (2) with supporting legs (9) that are used for height-adjusting are installed to the bottom of base (1).

9. A high-low temperature test chamber according to claim 1, wherein: the article holding support plate (5) is provided with a temperature sensor (51), and the temperature sensor (51) is electrically connected with the single chip microcomputer (21).

Technical Field

The invention relates to the technical field of temperature change tests, in particular to a high-low temperature test box.

Background

As modern electronic product design capabilities mature, electronic product defects are often introduced during the manufacturing process, particularly at the batch production stage. The use of defective raw materials and components introduces potential electronic product defects. The method applies high and low temperature circulating temperature stress on electronic products, and is a method for identifying and eliminating early faults of product processes, components and the like.

In the prior art, in the current high-low temperature change test box, the heating mode is mainly heating through an electric heating tube, and the refrigerating mode is mainly a mechanical refrigerating mode through an evaporator. However, in the test process, because the heater is usually fixed in the box, the product is placed on the article holding plate in the box, so that the temperature of the product close to one side of the heater is increased sharply, and the temperature of the product away from one side of the heater is increased slowly, so that the product is heated unevenly, and the accuracy of the test result is affected.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the high-low temperature test box, and the rotatable object placing supporting plate and the rotatable heating device are arranged in the box body, so that all surfaces of the product can be uniformly heated in the temperature rising process of a high-low temperature test, and the accuracy of the test result is improved.

The above object of the present invention is achieved by the following technical solutions:

a high-low temperature test box comprises a base, a box body fixed on the base and a control box fixed on the side wall of the box body, wherein a plurality of heating devices for heating, a plurality of refrigerating devices for cooling and a wind power circulating device for heat exchange are arranged in the box body;

the refrigerator comprises a box body, a heating device and a refrigerating device, wherein a rotatable object placing supporting plate is arranged in the box body, a rotating seat is arranged on the heating device, the rotating seat is installed on the inner wall of the box body, the refrigerating device comprises an evaporator and a liquid nitrogen refrigerating system, and the evaporator is fixedly connected with the inner wall of the box body and is arranged above the object placing supporting plate;

a single chip microcomputer is arranged in the control box and is respectively in control connection with the rotating seat, the heating device and the refrigerating device.

Through the technical scheme, when a high-low temperature rapid temperature change test is carried out on a product, the product is placed on the object-placing supporting plate in the box body, and the heating device or the refrigerating device is started through the control single chip microcomputer, so that the temperature of the box body is increased or reduced. When the product to be measured in the box receives the impact of hot air, open through the singlechip and rotate the seat for heating device rotates in the horizontal direction, thereby makes each face of product be heated evenly, has increased the speed that the temperature rose in the box. After the temperature in the box body rises to a certain temperature, the heating device is closed, the evaporator and the liquid nitrogen refrigerating system are opened through the single chip microcomputer, so that the temperature in the box body is suddenly reduced, the liquid nitrogen refrigerating system and the evaporator are arranged to refrigerate, the temperature can be quickly reduced to a required temperature, and the accuracy of the test is improved.

The present invention in a preferred example may be further configured to: the heating device comprises an installation shaft, a light-gathering cover in an arc shape and a heating bulb, wherein one end of the installation shaft is rotatably connected to the rotating seat, and the other end of the installation shaft is fixedly connected with the convex surface of the light-gathering cover;

the heating bulb is installed the center department of the concave surface of snoot, the concave surface orientation of snoot put the setting of thing layer board, the heating bulb with the singlechip electricity is connected.

Through above-mentioned technical scheme, make heating bulb circular telegram back send to have thermal light through control singlechip, light collects the reflection on the product of putting the thing layer board on the spotlight cover to make the temperature on product surface rise rapidly, improved the efficiency of heating. The installation axle rotates along with rotating the seat for light can be even reflection in the different positions department of product, is favorable to the rapid heating and the thermally equivalent of test article.

The present invention in a preferred example may be further configured to: the four heating devices are arranged in a rectangular shape, and the four heating devices are respectively and rotatably arranged on four surfaces of the inner wall of the box body through rotating seats.

Through the technical scheme, the four heating devices rotate together and heat the test object, so that the heating rate is improved to a great extent, the surface of the product is heated uniformly, no temperature impact dead angle is generated, and the accuracy of the test result is improved.

The present invention in a preferred example may be further configured to: fixedly connected with step motor in the base, the coaxial fixedly connected with dwang of step motor's output shaft, the dwang is kept away from step motor's one end is passed the box with put the perpendicular fixed connection of thing layer board, the joint has the bearing frame on the box, the dwang cup joints in the inner circle of bearing frame.

Through above-mentioned technical scheme, step motor drives the dwang during operation and rotates, thereby the dwang rotates and drives and put the thing layer board and rotate for the test article can be when the heating and rotate, makes the product in the intensification in-process that carries out high low temperature test, and its each side can both be heated evenly, has further improved the accuracy of test result.

The present invention in a preferred example may be further configured to: the liquid nitrogen refrigeration system comprises a liquid nitrogen tank, a cold insulation pipeline, a pressure pump and an electromagnetic valve, wherein a base layer is arranged at the bottom of the box body, and a plurality of sequentially communicated annular grooves are formed in one surface, far away from the bottom, of the base layer;

the liquid nitrogen container is fixed in the control box, cold insulation pipeline sets up on the liquid nitrogen container and one end extends to bottom in the liquid nitrogen container, cold insulation pipeline's the other end passes the box with the bottom intercommunication of one of them annular groove, the force pump with solenoid valve installs on cold insulation pipeline and with the singlechip electricity is connected.

Through the technical scheme, the product opens the pressure pump and the electromagnetic valve through the single chip microcomputer in the cooling process of carrying out high and low temperature test, and liquid nitrogen in the liquid nitrogen tank is injected into a plurality of annular grooves in the box body through the cold insulation pipeline, so that the temperature in the box body is rapidly reduced in a very short time, and the rate of temperature reduction is improved.

The present invention in a preferred example may be further configured to: the base is internally and fixedly connected with a liquid collecting box, a ventilation pipe is installed on the liquid collecting box, a ventilation valve is arranged on the ventilation pipe, and one end, far away from the liquid collecting box, of the ventilation pipe penetrates through the box body and the base layer and then is communicated with the annular groove.

Through the technical scheme, when the temperature in the box body rises, the air exhausted from the box body is stored in the liquid collecting box, the vent valve is opened to enable the liquid collecting box to be communicated with the box body, and when the box body is cooled, the air in the liquid collecting box is sucked into the box body, so that the box body can breathe and spit out the same air, the air is not exchanged with the air in the environment, the moisture content in the box body can be ensured not to be continuously increased, and the surface of a measured product is ensured not to be condensed. And the used liquid nitrogen can be input into the liquid collecting box through the scavenging tube, so that certain influence of the liquid nitrogen on the temperature rise in the follow-up box body is avoided, and the practicability is improved.

The present invention in a preferred example may be further configured to: one side of box be provided with the sealing door that the box is connected, be provided with the visual window that is used for observing the product in the cavity on the sealing door.

Through above-mentioned technical scheme, the setting of sealing door is convenient for place or take out the product that awaits measuring, when testing the product that awaits measuring, the workman can observe the phenomenon whether condensation appears in the product surface that awaits measuring through the visual window, has improved the practicality.

The present invention in a preferred example may be further configured to: the outer side wall of the control box is provided with a touch display screen, the touch display screen is electrically connected with the single chip microcomputer, and supporting legs for adjusting the height are installed at the bottom of the control box and the bottom of the base.

Through above-mentioned technical scheme, the setting of touch-control display screen is convenient for the tester to pass through singlechip regulation heating device and refrigerating plant's each item parameter to degree of automation is high, the high low temperature test of being convenient for go on. The supporting legs make the box can keep away from ground, avoided subaerial water or dust to cause the damage to the box, improved the life of proof box.

The present invention in a preferred example may be further configured to: the article holding support plate is provided with a temperature sensor, and the temperature sensor is electrically connected with the single chip microcomputer.

Through above-mentioned technical scheme, temperature sensor can the temperature on real-time supervision product surface that awaits measuring, and the temperature data transmission of its collection to the singlechip, and the test temperature in the box can clearly be observed through the touch-control display screen to the tester to the experimental accuracy of product height low temperature has been improved.

In summary, the invention includes at least one of the following beneficial technical effects:

1. when a high-low temperature rapid temperature change test is carried out on a product, the product is placed on the object-placing supporting plate in the box body, and the heating device or the refrigerating device is started through the control single chip microcomputer, so that the temperature of the box body is increased or reduced. When the product to be measured in the box receives the impact of hot air, open through the singlechip and rotate the seat for heating device rotates in the horizontal direction, thereby makes each face of product be heated evenly, has increased the speed that the temperature rose in the box. After the temperature in the box body rises to a certain temperature, the heating device is closed, the evaporator and the liquid nitrogen refrigerating system are opened through the single chip microcomputer, so that the temperature in the box body is suddenly reduced, the liquid nitrogen refrigerating system and the evaporator are arranged to refrigerate, the temperature can be quickly reduced to a required temperature, and the accuracy of the test is improved.

2. The heating lamp bulb is powered on and then emits light with heat through the control single chip microcomputer, and the light is collected on the condensation cover and reflected to a product of the object placing support plate, so that the temperature of the surface of the product is rapidly increased, and the heating efficiency is improved. The installation axle rotates along with rotating the seat for light can be even reflection in the different positions department of product, is favorable to the rapid heating and the thermally equivalent of test article.

3. Step motor drives the dwang during operation and rotates, thereby the dwang rotates and drives and put the thing layer board and rotate for the test article can be when the heating and rotate, makes the product in the intensification in-process that carries out high low temperature test, and its each side can both be heated evenly, has further improved the accuracy of test result.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Reference numerals: 1. a base; 11. a box body; 12. a base layer; 13. an annular groove; 14. a liquid collection tank; 15. a ventilation tube; 16. a vent valve; 17. a sealing door; 18. a visual window; 2. a control box; 21. a single chip microcomputer; 22. a touch display screen; 3. a heating device; 31. a rotating seat; 32. installing a shaft; 33. a light-gathering cover; 34. heating the bulb; 4. a wind power circulation device; 5. a placement support plate; 51. a temperature sensor; 6. an evaporator; 7. a liquid nitrogen refrigeration system; 71. a liquid nitrogen tank; 72. a cold insulation pipe; 73. a pressure pump; 74. an electromagnetic valve; 8. a stepping motor; 81. rotating the rod; 82. a bearing seat; 9. support the feet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the high and low temperature test chamber disclosed by the invention comprises a base 1, a chamber body 11 fixed on the base 1, and a control chamber 2 fixed on the side wall of the chamber body 11. Referring to fig. 2, a plurality of heating devices 3 for raising the temperature, a plurality of cooling devices for lowering the temperature, and a wind power circulation device 4 for exchanging heat are provided in the casing 11.

Referring to fig. 1, a sealing door 17 connected to the box 11 is disposed on one side of the box 11, and a viewing window 18 for viewing the product in the cavity is disposed on the sealing door 17. The setting of sealing door 17 is convenient for place or take out the product that awaits measuring, and when testing the product that awaits measuring, the workman can observe the phenomenon that whether the product surface that awaits measuring appears the condensation through visual window 18, has improved the practicality.

Referring to fig. 2, a rotatable article holding plate 5 is arranged in the box body 11, a rotating seat 31 is arranged on the heating device 3, the rotating seat 31 is installed on the inner wall of the box body 11, the refrigerating device comprises an evaporator 6 and a liquid nitrogen refrigerating system 7, and the evaporator 6 is fixedly connected with the inner wall of the box body 11 and is arranged above the article holding plate 5. A singlechip 21 is arranged in the control box 2, and the singlechip 21 is respectively connected with the rotating seat 31, the heating device 3 and the refrigerating device in a control way.

Referring to fig. 2, the heating device 3 includes an installation shaft 32, a circular arc-shaped light-gathering cover 33, and a heating bulb 34, wherein one end of the installation shaft 32 is rotatably connected to the rotating base 31, and the other end is fixedly connected to a convex surface of the light-gathering cover 33. The heating bulb 34 is installed in the center of the concave surface of the light-collecting cover 33, the concave surface of the light-collecting cover 33 is arranged towards the object placing support plate 5, and the heating bulb 34 is electrically connected with the single chip microcomputer 21.

The heating bulb 34 emits light with heat after being electrified by controlling the singlechip 21, and the light is collected and reflected on the product of the object holding plate 5 on the light-gathering cover 33, so that the temperature of the surface of the product is rapidly increased, and the heating efficiency is improved. Installation axle 32 rotates along with rotating seat 31 for light can be even reflection in the different positions department of product, is favorable to the rapid heating and the thermally equivalent of test article.

Further, four heating devices 3 are arranged, the housing 11 has a rectangular parallelepiped shape, and the four heating devices 3 are rotatably provided on four surfaces of the inner wall of the housing 11 via rotary bases 31, respectively. The four heating devices 3 rotate together and heat the test object, so that the heating rate is improved to a great extent, the surface of the product is heated uniformly, no temperature impact dead angle is generated, and the accuracy of the test result is improved.

Referring to fig. 2, a stepping motor 8 is fixedly connected in the base 1, a rotating rod 81 is fixedly connected to an output shaft of the stepping motor 8 coaxially, one end of the rotating rod 81, which is far away from the stepping motor 8, penetrates through the box body 11 and is vertically and fixedly connected with the object supporting plate 5, a bearing seat 82 is clamped on the box body 11, and the rotating rod 81 is sleeved in an inner ring of the bearing seat 82. The dwang 81 is driven to rotate by the 8 during operation of step motor, thereby the dwang 81 rotates and drives and put thing layer board 5 and rotate for the test article can be when the heating and rotate, makes the product in the intensification in-process that carries out high low temperature test, and its each side can both be heated evenly, has further improved the accuracy of test result.

The liquid nitrogen refrigerating system 7 comprises a liquid nitrogen tank 71, a cold insulation pipeline 72, a pressure pump 73 and an electromagnetic valve 74, wherein the bottom of the box body 11 is provided with a base layer 12, and one surface of the base layer 12, which is far away from the bottom, is provided with a plurality of sequentially communicated annular grooves 13. Liquid nitrogen tank 71 is fixed in control box 2, separates cold pipeline 72 and sets up on liquid nitrogen tank 71 and one end extends to the bottom in liquid nitrogen tank 71, separates cold pipeline 72's the other end and passes box 11 and communicate with the bottom of one of them annular groove 13, and force pump 73 and solenoid valve 74 are installed on separating cold pipeline 72 and are connected with singlechip 21 electricity.

In the cooling process of a high-low temperature test of a product, the pressure pump 73 and the electromagnetic valve 74 are opened through the single chip microcomputer 21, liquid nitrogen in the liquid nitrogen tank 71 is injected into the plurality of annular grooves 13 in the box body 11 through the cold insulation pipeline 72, so that the temperature in the box body 11 is rapidly reduced in a very short time, and the temperature reduction rate is improved.

Referring to fig. 2, a liquid collecting tank 14 is fixedly connected in the base 1, a ventilation pipe 15 is installed on the liquid collecting tank 14, a ventilation valve 16 is arranged on the ventilation pipe 15, and one end of the ventilation pipe 15, which is far away from the liquid collecting tank 14, penetrates through the box body 11 and the base layer 12 and then is communicated with the annular groove 13. When the temperature in the box body 11 rises, the air exhausted from the box body is stored in the liquid collecting box 14, the vent valve 16 is opened to enable the liquid collecting box 14 to be communicated with the inside of the box body 11, and when the box body 11 is cooled, the air in the liquid collecting box 14 is sucked into the box body 11 in the box body 11, so that the air sucked and discharged by the breathing action of the box body 11 is the same air and is not exchanged with the air in the environment, the moisture content in the box body 11 can be ensured not to be continuously increased, and the surface of a detected product is ensured not to be condensed. And the used liquid nitrogen can be input into the liquid collecting box 14 through the scavenging tube 15, so that certain influence of the liquid nitrogen on the temperature rise in the subsequent box body 11 is avoided, and the practicability is improved.

In this embodiment, install touch-control display screen 22 on the lateral wall of control box 2, touch-control display screen 22 and singlechip 21 electric connection, supporting legs 9 that are used for height-adjusting are installed to the bottom of control box 2 and base 1. The setting of touch-control display screen 22 is convenient for the experimenter to adjust heating device 3 and refrigerating plant's each item parameter through singlechip 21 to degree of automation is high, the high low temperature test of being convenient for goes on. Supporting legs 9 make box 11 can keep away from ground, have avoided subaerial water or dust to cause the damage to box 11, have improved the life of proof box.

Referring to fig. 2, the article support plate 5 is provided with a temperature sensor 51, and the temperature sensor 51 is electrically connected to the single chip microcomputer 21. Temperature sensor 51 can real-time supervision product surface's temperature, and the temperature data transmission of its collection to singlechip 21, and the experimenter can clearly observe the experimental temperature in box 11 through touch-control display screen 22 to the experimental accuracy of product height has been improved.

The implementation principle of the embodiment is as follows: when carrying out the quick temperature change test of high low temperature to the product, put into the product in the box 11 on putting thing layer board 5, open heating device 3 or refrigerating plant through control singlechip 21 for the temperature of box 11 risees or reduces. When the product to be measured in the box 11 is impacted by hot air, the rotating seat 31 is opened through the single chip microcomputer 21, so that the heating device 3 rotates in the horizontal direction, all surfaces of the product are heated uniformly, and the temperature rising speed in the box 11 is increased.

After the temperature in the box body 11 rises to a certain temperature, the heating device 3 is closed, the evaporator 6 and the liquid nitrogen refrigerating system 7 are opened through the single chip microcomputer 21, so that the temperature in the box body 11 is suddenly reduced, the liquid nitrogen refrigerating system 7 and the evaporator 6 are arranged to refrigerate, the temperature can be quickly reduced to the required temperature, and the accuracy of the test is improved.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.