Heat conduction testing device in vacuum environment

Abstract

The utility model provides a heat conduction testing device in a vacuum environment. When a product is tested, the product to be tested is placed on the test fixture in the vacuum box through the vacuum cover plate door, then the vacuum generator vacuumizes the interior of the vacuum box, meanwhile, the air pressure sensor monitors the air pressure in the vacuum box until the air pressure in the vacuum box reaches a set negative pressure value, and then the test fixture is started. The heating circulation system heats or cools a to-be-tested product on the test fixture through a temperature conducting medium for providing the temperature of the water cooling plate conveying belt, and meanwhile, the test fixture monitors the temperature of the to-be-tested product through a temperature monitoring element, so that a temperature test environment is provided for the to-be-tested product; the product to be tested is isolated from the outside through the vacuum environment, so that when the product is tested, the influence of external temperature change and fluctuation and interference of other impurities such as heat radiation and the like on the stability and the accuracy of the test can be effectively avoided; the utility model belongs to the technical field of test equipment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of test equipment, especially relates to a heat conduction testing device under vacuum environment. BACKGROUND

[0002] The temperature environment test of electronic product is to evaluate the performance and reliability of electronic product under different temperature conditions to ensure its stable operation in various environments. At present, the temperature environment test of electronic product is mainly through the heat conduction test system to transmit heat to the electronic product to simulate different temperature environments. Although the heat conduction test system basically has temperature monitoring and control unit, when testing electronic product, the temperature change and fluctuation of test workshop or other external environment and the interference of other impurities such as heat radiation will affect the stability and accuracy of the test. UTILITY MODEL CONTENT

[0003] The utility model aims at providing a heat conduction testing device under vacuum environment to solve the technical problem in the background art.

[0004] The heat conduction testing device under vacuum environment includes vacuum box, vacuum generator, air pressure sensor, vacuum cover plate door, aviation plug, test fixture and heating circulation system are installed in the vacuum box, the test fixture is used for placing the product to be tested, the test fixture is located in the vacuum box, the test fixture is connected with the aviation plug electric signal, the test fixture is provided with the water cooling plate for giving the product to be tested the conduction temperature, the water cooling plate is connected with the pipeline of heating circulation system, and the air pressure sensor is used for monitoring the air pressure in the vacuum box.

[0005] According to the technical scheme, the utility model realizes the following beneficial effects:

[0006] When testing the product, the product to be tested is placed on the test fixture in the vacuum box through the vacuum cover plate door, then the vacuum generator pumps the vacuum in the vacuum box, at the same time, the air pressure sensor monitors the air pressure in the vacuum box, until the air pressure in the vacuum box reaches the set negative pressure value, then the heating circulation system supplies the water cooling plate with temperature-conducting medium to heat or cool the product to be tested on the test fixture, at the same time, the test fixture monitors the temperature of the product to be tested through the temperature monitoring element, so as to provide the temperature test environment for the product to be tested. Since the product to be tested is isolated from the outside world through the vacuum environment, the temperature change and fluctuation of the outside world and the interference of other impurities such as heat radiation can be effectively avoided when testing the product, so as to affect the stability and accuracy of the test.

[0007] In order to further optimize the above technical scheme, one or more of the following embodiments can be combined without conflict.

[0008] In some embodiments, the heating cycle system is a water tank, a circulating water pump, a heating plate and a cooling device are arranged in the water tank, the circulating water pump is provided with a circulating pipeline connected with the water cooling plate, and the circulating pipeline is isolated from the space in the vacuum tank;

[0009] According to the technical scheme, the heating plate heats the liquid in the water tank, the circulating water pump circulates the heated liquid to the water cooling plate, and the water cooling plate transmits the heat of the liquid to the product to be tested, thereby continuously heating and keeping warm the product to be tested.

[0010] In some embodiments, the test fixture comprises a lower box, a rack and an upper box, the rack is provided with an electric cylinder connected with the aviation plug, the electric cylinder drives the upper box to cover the lower box, so that the lower box and the upper box form an inner space, the product to be tested is located in the inner space, and the water cooling plate is used to transmit the temperature to the inner space.

[0011] According to the technical scheme, since the product to be tested is located in the inner space, the product to be tested is further isolated from the outside, and the product to be tested can be kept warm.

[0012] In some embodiments, the lower box and the upper box are provided with water cooling plates; according to the technical scheme, the water cooling plates can more efficiently transmit heat to the product to be tested, and can uniformly transmit heat to the product to be tested.

[0013] In some embodiments, a lower aerogel block is installed in the lower box, a lower product-shaped aluminum block in contact with the water cooling plate is installed in the middle of the lower aerogel block, and the lower product-shaped aluminum block is in contact with the product to be tested.

[0014] According to the technical scheme, the water cooling plate is in close contact with the product to be tested through the lower product-shaped aluminum block, thereby reducing heat transfer loss, and in addition, the lower aerogel block can keep the lower product-shaped aluminum block warm, thereby reducing heat loss and improving heating efficiency.

[0015] In some embodiments, an upper aerogel block is installed in the upper box, an upper product-shaped aluminum block in contact with the water cooling plate is installed in the middle of the upper aerogel block, and when the upper box covers the lower box, the upper product-shaped aluminum block is in contact with the lower product-shaped aluminum block to wrap the product to be tested.

[0016] According to the technical scheme, since the upper product-shaped aluminum block and the lower product-shaped aluminum block wrap and closely adhere to the product to be tested, the water cooling plate can more uniformly and efficiently transmit heat to the product to be tested, and in addition, the upper aerogel block can keep the upper product-shaped aluminum block warm, thereby reducing heat loss and improving heating efficiency.

[0017] In some embodiments, the upper aerogel block is provided with air-tight insulation cotton in contact with the lower aerogel block when the upper box is closed on the lower box, the air-tight insulation cotton being around the outer periphery of the upper product-mimic aluminum block;

[0018] According to the technical scheme, when the upper box is closed on the lower box, the inner space is a closed space, so that the product to be tested is further isolated from the external environment, and meanwhile, the temperature test environment provided for the product to be tested is not disturbed by the negative pressure environment in the vacuum box.

[0019] In some embodiments, the lower aerogel block is provided with a pressure sensor in contact with the upper aerogel block;

[0020] According to the technical scheme, the pressure of the lower box after the upper box is closed on the lower box is detected by the pressure sensor, so that the pressure is controlled to ensure that the inner space is sealed and the upper product-mimic aluminum block and the lower product-mimic aluminum block are tightly attached to the product to be tested. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments in the present application, the following will briefly describe the drawings and labels used in the description of the specific embodiments.

[0022] Fig. 1 is a structural schematic view of the vacuum box when the vacuum cover plate door is not opened according to the present application;

[0023] Fig. 2 is a structural schematic view of the vacuum box when the vacuum cover plate door is opened according to the present application;

[0024] Fig. 3 is a structural schematic view of the test fixture according to the present application;

[0025] Fig. 4 is a structural schematic view of the lower box according to the present application;

[0026] Fig. 5 is a bottom surface structural schematic view of the upper box according to the present application.

[0027] Reference signs:

[0028] 1, vacuum box; 11, vacuum generator; 12, air pressure sensor; 13, vacuum cover plate door; 14, aviation plug; 2, test fixture; 21, rack; 22, electric cylinder; 23, water-cooled plate; 3, lower box; 31, lower aerogel block; 32, lower product-mimic aluminum block; 33, pressure sensor; 4, upper box; 41, upper aerogel block; 42, upper product-mimic aluminum block; 43, air-tight insulation cotton. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the utility model more clear and explicit, the following will be described with reference to the drawings.

[0030] As Figs. 1 to 5 shown, the embodiment provides a heat conduction testing device in vacuum environment, which comprises a vacuum box 1, the vacuum box 1 is installed with a vacuum generator 11, an air pressure sensor 12, a vacuum cover plate door 13, an aviation plug 14, a testing fixture 2 and a heating circulation system.

[0031] The testing fixture 2 is located in the vacuum box 1, and the testing fixture 2 is electrically connected with the aviation plug 14.The testing fixture 2 comprises a lower box 3, an upper box 4 and a rack 21.The lower box 3 and the upper box 4 are both provided with a water-cooling plate 23.A lower aerogel block 31 is installed in the lower box 3, and a lower product simulation aluminum block 32, which is in contact with the water-cooling plate 23, is installed in the middle of the lower aerogel block 31, and the lower product simulation aluminum block 32 is used for placing a product to be tested.The rack 21 is installed with an electric cylinder 22 which is electrically connected with the aviation plug 14, and the electric cylinder 22 drives the upper box 4 to cover the lower box 3, so that the lower box 3 and the upper box 4 form an inner space;an upper aerogel block 41 is installed in the upper box 4, and an upper product simulation aluminum block 42, which is in contact with the water-cooling plate 23, is installed in the middle of the upper aerogel block 41;when the upper box 4 covers the lower box 3, the upper product simulation aluminum block 42 is in contact with the lower product simulation aluminum block 32, which wraps the product to be tested;the upper product simulation aluminum block 42 and the lower product simulation aluminum block 32 are provided with temperature monitoring elements, and probes electrically connected with the product to be tested or transceivers wirelessly connected with the product to be tested can be selected to be arranged on the upper product simulation aluminum block 42 and the lower product simulation aluminum block 32.In the state that the upper box 4 covers the lower box 3, a pressure sensor 33 is installed in the lower aerogel block 31 and in contact with the upper aerogel block 41, and the upper aerogel block 41 is provided with air-tight thermal insulation cotton 43 which is in contact with the lower aerogel block 31, and the air-tight thermal insulation cotton 43 surrounds the outer periphery of the upper product simulation aluminum block 42.

[0032] The heating circulation system is a water tank, and a circulating water pump, a heating plate and a cooling device are arranged in the water tank.The circulating water pump is provided with a circulating pipeline which is connected with the water-cooling plate 23, and the circulating pipeline is isolated from the space in the vacuum box 1.

[0033] The following is the working principle of the heat conduction testing device in vacuum environment described in the embodiment.

[0034] When testing the product, the product to be tested is put into the vacuum box 1 through the vacuum cover plate door 13 and placed on the lower product imitation aluminum block 32; then, the electric cylinder 22 drives the upper box 4 to cover the lower box 3, and the pressure sensor 33 detects the lower pressure after the upper box 4 covers the lower box 3, so that the lower box 3 and the upper box 4 form an inner space, at this time, the upper aerogel block 41 is in contact with the lower aerogel block 31 through the air-tight thermal insulation cotton 43, and the upper product imitation aluminum block 42 and the lower product imitation aluminum block 32 wrap and adhere to the product to be tested; then, the vacuum cover plate door 13 is closed, the vacuum generator 11 pumps the vacuum in the vacuum box 1, at the same time, the air pressure sensor 12 monitors the air pressure in the vacuum box 1, until the air pressure in the vacuum box 1 reaches the set negative pressure value; then, the heating plate heats the liquid in the water tank, and the circulating water pump circulates the heated liquid to the water cooling plate 23, and the water cooling plate 23 transmits the heat of the liquid to the product to be tested through the upper product imitation aluminum block 42 and the lower product imitation aluminum block 32, so as to provide a temperature test environment for the product to be tested.

Claims

1. A heat conduction testing device in a vacuum environment, characterized in that: The application relates to a vacuum box (1) which is provided with a vacuum generator (11), an air pressure sensor (12), a vacuum cover plate door (13), an aviation plug (14), a test fixture (2) for placing a product to be tested and a heating circulation system, the test fixture (2) is located in the vacuum box (1), the test fixture (2) is electrically connected with the aviation plug (14), the test fixture (2) is provided with a water-cooled plate (23) for giving the product to be tested a conduction temperature, the water-cooled plate (23) is connected with a circulation pipeline of the heating circulation system, and the air pressure sensor (12) is used for monitoring the air pressure in the vacuum box (1).

2. The heat transfer testing device in vacuum environment according to claim 1, characterized in that: The heating circulation system is a water tank which is provided with a circulating water pump, a heating plate and a cooling device, the circulating water pump is provided with a circulation pipeline which is connected with the water-cooled plate (23), and the circulation pipeline is isolated from the space in the vacuum box (1).

3. The heat transfer testing device under vacuum environment according to claim 1, characterized in that: The test fixture (2) comprises a lower box (3), a rack (21) and an upper box (4), the rack (21) is provided with an electric cylinder (22) which is electrically connected with the aviation plug (14), the electric cylinder (22) drives the upper box (4) to cover the lower box (3), so that the lower box (3) and the upper box (4) form an inner space, the product to be tested is located in the inner space, and the water-cooled plate (23) is used for conducting temperature to the inner space.

4. The heat transfer testing device under vacuum environment according to claim 3, characterized in that: The water-cooled plate (23) is arranged on the lower box (3) and the upper box (4).

5. The heat transfer testing device under vacuum environment according to claim 4, characterized in that: A lower aerogel block (31) is arranged in the lower box (3), a lower product-shaped aluminum block (32) which is in contact with the water-cooled plate (23) is arranged in the middle of the lower aerogel block (31), and the lower product-shaped aluminum block (32) is in contact with the product to be tested.

6. The heat transfer testing device under vacuum environment according to claim 5, characterized in that: An upper aerogel block (41) is arranged in the upper box (4), an upper product-shaped aluminum block (42) which is in contact with the water-cooled plate (23) is arranged in the middle of the upper aerogel block (41), and when the upper box (4) covers the lower box (3), the upper product-shaped aluminum block (42) is in contact with the lower product-shaped aluminum block (32) to wrap the product to be tested.

7. The heat transfer testing device under vacuum environment according to claim 6, characterized in that: When the upper box (4) covers the lower box (3), the upper aerogel block (41) is provided with air-tight thermal cotton (43) which is in contact with the lower aerogel block (31) and surrounds the outer periphery of the upper product-shaped aluminum block (42).

8. The heat transfer testing device under vacuum environment according to claim 6, characterized in that: The lower aerogel block (31) is provided with a pressure sensor (33) which is in contact with the upper aerogel block (41).

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