Reliability testing device for switch

Abstract

The utility model relates to a reliability testing device for a switch, which comprises a testing cabin, a box door, an air outlet cabin which is fixedly arranged at the rear part of the box door and is used for blowing airflow into the testing cabin, an air return cabin which is arranged at the rear part of the testing cabin and is used for returning air, and a circulating air duct which is arranged outside the testing cabin and is respectively communicated with the air outlet cabin and the air return cabin, the air outlet cabin is provided with an air inlet face and a plurality of air outlet faces which are arranged on the outer side of the air outlet cabin, a plurality of air inlets are formed in the air inlet face, the air outlet faces are obliquely arranged from front to back and from outside to inside, a plurality of air outlets are formed in each air outlet face, and a plurality of air blowing openings are formed in the front end face of the circulating air duct. The front end face of the circulating air duct is attached to the air inlet face, and the multiple air blowing openings are opposite to the multiple air inlets in a one-to-one correspondence mode. According to the utility model, the uniformity and stability of the environment in the test cabin are ensured, the consistency of the environment of each tested product is also ensured, and the accuracy of the test result is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a reliability test device for switchboard, be applicable to reliability test technical field. BACKGROUND

[0002] Reliability test is an indispensable step in electronic component test link, and is mainly to test the state and performance index of electronic components under complex environment, etc., and this step needs to make electronic components in high temperature, high temperature and high humidity or low temperature environment to run, monitor the electrical variables in the process of running, and the chemical or physical changes, so as to screen out the defective products. At present, the reliability test equipment is mostly through the setting fan to form circulating air in the test cabin, and through the refrigeration system or electric heating device to cool or heat the gas, so that the circulating air with temperature can create the required test environment in the test cabin. In the existing test device, the air inlet and air return of circulating air are mostly set on the left and right sides of the test cabin, and the measured products are fixed in the middle of the test cabin through the layer frame structure, and a plurality of measured products are arranged on each layer frame, the air flow blown by the air inlet can also be blown from one side to the other side while creating the test cabin environment, and the heat emitted by the measured product itself is taken away, ensuring that the environment of the measured product is uniform and stable. However, in the test of devices such as switchboard, due to the relatively large size of switchboard, the arrangement in the test cabin is very close, and the heat emission of switchboard is high, so the air flow blown from one side is easily blocked by the products close to the air inlet, so that the products far from the air inlet cannot contact the stable and uniform air flow, and the temperature of the air flow after taking away the heat emitted by the products close to the air inlet will change significantly, resulting in the difference of the air flow temperature after passing through the left and right products, so that not only the temperature environment in the test cabin is not uniform, but also the heat emission of part of the measured products cannot be quickly removed, resulting in the inconsistency of the environment between the measured products, thereby affecting the accuracy of the test result. UTILITY MODEL CONTENTS

[0003] In order to solve the defects existing in the prior art, the utility model provides a reliability test device for switchboard.

[0004] The utility model discloses a technical scheme is a kind of reliability test device for switch, including the test cabin for placing switch, the box door of cover being located in the front of test cabin, the air outlet cabin of fixedly being set in the rear of box door and for blowing into airflow into test cabin, the air return cabin of being set in the rear of test cabin and for air return, the circulating air duct of being set in the outside of test cabin and respectively with air outlet cabin and air return cabin communication, air outlet cabin has the air inlet face of being set in its outside and multiple air outlet face, several air inlets are opened in air inlet face, multiple air outlet face is all from front to back by outside to inside's inclination setting, and several air outlets are opened in each air outlet face, several air outlet openings are opened in the front end face of circulating air duct, when box door is in closed state, the front end face of circulating air duct and air inlet face are inlaid, and several air outlet openings and several air inlets are corresponding to each other oppositely. By setting air outlet cabin in the front of test cabin, and air return cabin is set in the rear of test cabin, the structure of traditional equipment by two sides air outlet and air return is changed by front air outlet, rear air return, so that when the device such as switch is tested, airflow will evenly flow through each measured product, avoid product to block or influence airflow;And air outlet cabin is fixed in the rear of box door, and when box door is closed, the air outlet opening of circulating air duct and the air inlet opening of air outlet cabin are opposite, so that the change of air duct structure cannot influence the layout of measured product in test cabin, take, so as to not only ensure the uniform stability of environment in test cabin, but also ensure the consistency of environment of each product, improve the accuracy of test result.

[0005] Further, the air outlet cabin is set as quadrangular frustum, and the lower bottom surface of the quadrangular frustum is fixedly connected with the rear wall of the box door, the air inlet face is the side face above the quadrangular frustum, and the air outlet face is the side face below and on the left and right sides of the quadrangular frustum. The quadrangular frustum-shaped air outlet cabin not only ensures the simplicity of the structure, but also facilitates the butt joint of the air outlet cabin and the circulating air duct, and also ensures that the airflow blown into the test cabin is uniform and stable.

[0006] Further, the front end face of the circulating air duct is inclined from top to bottom from front to back, and the inclination of the front end face is the same as that of the air inlet face, so as to be inlaid with the front end face of the circulating air duct and the air inlet face of the air outlet cabin, and ensure that the air outlet opening and the air inlet opening can be accurately opposite.

[0007] Further, the test device further comprises a fan arranged in the circulating air duct, so as to provide power by the fan to drive air to form a circulating airflow.

[0008] Further, the front wall and the rear wall of the air return cabin are respectively provided with a first air return opening and a second air return opening in communication with the test cabin and the circulating air duct, the first air return opening and the second air return opening are in communication, so as to flow the airflow from the air return cabin back to the circulating air duct to form a circulation.

[0009] Further, the first return air inlets are arranged in an array on the front wall of the return air cabin, so as to guide the air flow in the test cabin.

[0010] Further, the test device further comprises a heater and a cooler arranged in the return air cabin, in particular, the heater is a mesh-shaped electric heating wire, and the cooler is an evaporator connected with a refrigeration system, so as to heat or cool the passing air flow, so as to create a test environment in the test cabin.

[0011] Thanks to the above technical scheme, the utility model has the following advantages compared with the prior art:

[0012] The reliability test device for the switch in the utility model changes the air outlet and return air on both sides in the traditional test equipment into air outlet on the front side of the test cabin and return air on the back side, avoids the block and influence of the arranged products in the test cabin on the air flow, and fixes the air outlet cabin on the back wall of the box door, and makes the air outlet cabin be connected with the circulating air duct when the box door is closed, prevents the change of the air duct structure from affecting the normal layout in the test cabin, not only ensures the uniformity and stability of the environment in the test cabin, but also ensures the consistency of the environment of each measured product, and improves the accuracy of the test result. BRIEF DESCRIPTION OF DRAWINGS

[0013] Some specific embodiments of the utility model will be described in detail below with reference to the accompanying drawings in an exemplary but not restrictive manner. The same reference signs in the drawings indicate the same or similar mechanisms or parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the drawings:

[0014] Figure 1 is the internal structure schematic of one embodiment in the utility model Figure 1 ;

[0015] Figure 2 is Figure 1 the internal structure schematic of the embodiment shown in the figure Figure 2 ;

[0016] Figure 3 is Figure 1 the structure schematic of the air outlet cabin in the embodiment shown in the figure

[0017] Figure 4 is Figure 1 the internal structure schematic of the test cabin in the embodiment shown in the figure

[0018] Figure 5 is Figure 1 the air flow direction diagram in the embodiment shown in the figure

[0019] The reference signs are explained as follows:

[0020] 1, test cabin; 2, box door; 3, air outlet cabin; 31, air inlet face; 32, air outlet face; 33, air inlet; 34, air outlet; 4, air return cabin; 41, first air return; 42, second air return; 5, circulating air duct; 51, air outlet; 52, fan. DETAILED DESCRIPTION

[0021] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0022] In the description of the present application, it should be noted that the terms "front", "back", "inner", "outer" related to the direction are defined according to the structure direction of the test device. Specifically, the direction towards which the box door of the test device faces is "front", and vice versa is "back"; the side towards the inside of the test cabin is "inner", and vice versa is "outer"; the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0023] Reference is made to the accompanying drawings Figures 1-5The reliability testing device for the switch in the embodiment comprises a testing cabin 1 for placing the switch, a box door 2 arranged in front of the testing cabin 1, an air outlet cabin 3 fixedly arranged at the rear of the box door 2 and used for blowing air into the testing cabin 1, an air return cabin 4 arranged at the rear of the testing cabin 1 and used for air return, a circulating air duct 5 arranged outside the testing cabin 1 and communicated with the air outlet cabin 3 and the air return cabin 4 respectively, the air outlet cabin 3 has an air inlet face 31 arranged at the outer side thereof and a plurality of air outlet faces 32, a plurality of air inlets 33 are arranged on the air inlet face 31, the plurality of air outlet faces 32 are all arranged from front to back and from outside to inside, and a plurality of air outlets 34 are arranged on each air outlet face 32, a plurality of air blowing ports 51 are arranged on the front end face of the circulating air duct 5, when the box door 2 is in the closed state, the front end face of the circulating air duct 5 is attached to the air inlet face 31, and the plurality of air blowing ports 51 and the plurality of air inlets 33 are correspondingly opposite to each other. By arranging the air outlet cabin 3 in front of the testing cabin 1 and arranging the air return cabin 4 at the rear of the testing cabin 1, the structure of blowing air from both sides and returning air from the rear in the traditional equipment is changed to blowing air from the front and returning air from the rear, so that when the switch and the like are tested, the air flow will uniformly flow through each product to be tested, avoiding the product from blocking or affecting the air flow. By fixing the air outlet cabin 3 to the rear of the box door 2 and allowing the air blowing ports 51 of the circulating air duct 5 to be opposite to the air inlets 33 of the air outlet cabin 3 when the box door 2 is closed, the change of the air duct structure will not affect the layout and taking of the products to be tested in the testing cabin 1, thereby not only ensuring the uniformity and stability of the environment in the testing cabin, but also ensuring the consistency of the environment of each product and improving the accuracy of the test results.

[0024] In a more preferred embodiment, the air outlet cabin 3 is arranged in a quadrangular frustum shape, the lower bottom face of the quadrangular frustum is fixedly connected with the rear wall of the box door 2, the air inlet face 31 is the upper side face of the quadrangular frustum, and the air outlet faces 32 are the lower side face and the left and right side faces of the quadrangular frustum. The quadrangular frustum-shaped air outlet cabin 3 not only ensures the simplicity of the structure, but also facilitates the butt joint of the air outlet cabin 3 and the circulating air duct 5, and also ensures that the air flow blown into the testing cabin is uniform and stable.

[0025] In a more preferred embodiment, the front end face of the circulating air duct 5 is inclined from top to bottom from front to back, and the inclination of the front end face is the same as the inclination of the air inlet face 31, so as to attach the front end face of the circulating air duct 5 to the air inlet face of the air outlet cabin 3 and ensure that the air blowing ports 51 and the air inlets 33 can be accurately opposite to each other.

[0026] In a more preferred embodiment, the testing device further comprises a fan 52 arranged in the circulating air duct 5, so as to provide power by the fan 52 to drive the air to form a circulating air flow.

[0027] In a more preferable embodiment, the front wall and the rear wall of the return air cabin 4 are respectively provided with a first return air opening 41 communicated with the test cabin 1 and a second return air opening 42 communicated with the circulating air duct 5, the first return air opening 41 is communicated with the second return air opening 42, so as to facilitate the air flow from the return air cabin 4 to the circulating air duct 5, forming a circulation.

[0028] In a more preferable embodiment, the first return air opening 41 is provided with a plurality of first return air openings 41, and the plurality of first return air openings 41 are arranged in an array on the front wall of the return air cabin 4, so as to facilitate the air flow in the test cabin 1.

[0029] In a more preferable embodiment, the test device further comprises a heater (not shown in the figure) and a refrigerator (not shown in the figure) arranged in the return air cabin 4, specifically, the heater is arranged as a mesh electric heating wire, and the refrigerator is arranged as an evaporator connected with a refrigeration system, so as to heat or cool the passing air flow, thereby creating a test environment in the test cabin, further, the heater and the refrigerator are both arranged perpendicular to the air flow direction, ensuring that all the air flow will pass through the heater or the refrigerator during the flow process, improving the efficiency of air flow heating or cooling.

[0030] Due to the use of the above technical scheme, the utility model has the following advantages compared with the prior art:

[0031] The reliability test device for the switch in the utility model changes the air outlet and return air on both sides in the traditional test equipment into air outlet on the front side of the test cabin and return air on the rear side, avoids the blockage and influence of the products arranged in the test cabin on the air flow, and fixes the air outlet cabin on the rear wall of the box door, and makes it can be connected with the circulating air duct when the box door is closed, prevents the change of the air duct structure from affecting the normal layout in the test cabin, not only ensures the uniformity and stability of the environment in the test cabin, but also ensures the consistency of the environment of each measured product, improves the accuracy of the test result.

[0032] The above examples are only for illustrating the technical concept and characteristics of the utility model, the purpose is to enable the person skilled in the art to understand the content of the utility model and implement it, and it cannot limit the protection scope of the utility model, any equivalent change or modification according to the spirit and essence of the utility model should be covered in the protection scope of the utility model.

Claims

1. A reliability testing device for a switch, characterized in that: The test device comprises a test cabin (1) for placing the switch, a box door (2) arranged in front of the test cabin (1), an air outlet cabin (3) fixedly arranged at the rear of the box door (2) and used for blowing air into the test cabin (1), an air return cabin (4) arranged at the rear of the test cabin (1) and used for air return, a circulating air duct (5) arranged outside the test cabin (1) and communicating with the air outlet cabin (3) and the air return cabin (4) respectively, the air outlet cabin (3) has an air inlet face (31) arranged on the outer side thereof and a plurality of air outlet faces (32), a plurality of air inlet openings (33) are formed on the air inlet face (31), the plurality of air outlet faces (32) are arranged from front to back and from outside to inside in a slope manner, and a plurality of air outlet openings (34) are formed on each of the air outlet faces (32), a plurality of air blowing openings (51) are formed on the front end face of the circulating air duct (5), when the box door (2) is in a closed state, the front end face of the circulating air duct (5) is in abutment with the air inlet face (31), and the plurality of air blowing openings (51) correspond to the plurality of air inlet openings (33) one by one.

2. The reliability test device for a switch according to claim 1, wherein: The air outlet cabin (3) is arranged in a quadrangular frustum shape, the lower bottom face of the quadrangular frustum is fixedly connected with the rear wall of the box door (2), the air inlet face (31) is the upper side face of the quadrangular frustum, and the air outlet faces (32) are the lower side face and the left and right side faces of the quadrangular frustum.

3. The reliability test apparatus for a switch according to claim 2, wherein: The front end face of the circulating air duct (5) is inclined from top to bottom from front to back, and the inclination of the front end face is the same as that of the air inlet face (31).

4. The reliability test apparatus for a switch according to claim 1, wherein: The test device further comprises a fan (52) arranged in the circulating air duct (5).

5. The reliability test apparatus for a switch according to claim 1, wherein: The front wall and the rear wall of the air return cabin (4) are respectively provided with a first air return opening (41) communicating with the test cabin (1) and a second air return opening (42) communicating with the circulating air duct (5), and the first air return opening (41) and the second air return opening (42) are in communication.

6. The reliability test apparatus for a switch according to claim 5, wherein: A plurality of first air return openings (41) are arranged in an array on the front wall of the air return cabin (4).

7. The reliability test apparatus for a switch according to claim 1, wherein: The test device further comprises a heater and a refrigerator arranged in the air return cabin (4).

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