Ventilation type thermal aging test box

Abstract

The utility model belongs to the technical field of aging test boxes, and particularly relates to a ventilation type thermal aging test box. Comprising a box body, and an inner shell and an outer shell are arranged in the box body; the two circulating air ducts are arranged, the left circulating air duct and the right circulating air duct are respectively a left cavity and a right cavity divided by an inner cavity between the inner shell and the outer shell, a plurality of electric heating wires are arranged in the circulating air ducts, and a circulating fan is mounted at one end of each circulating air duct; the air inlet mesh and the air outlet mesh are arranged at the bottom and the top of the inner shell respectively and used for being communicated with the air inlet end and the air outlet end of the circulating air duct; the rotating net disc is rotationally installed at the bottom of the inner shell, the driving shaft end of the rotating net disc is connected with the output end of a driving motor, and the driving motor is installed in the box body; the aging temperature with uniform distribution can be provided for the to-be-tested product, the heating rate is high, and the aging test period of the product is shortened.

Description

Technical Field

[0001] This utility model belongs to the technical field of aging test chambers, and specifically relates to a ventilation-type thermal aging test chamber, which is particularly suitable for heat resistance testing of electrical insulation materials, and ventilation aging testing of electronic components and plastic products. Background Technology

[0002] Aging test chambers are mainly used to provide a high-temperature environment to meet the needs of users to conduct aging tests on products under high-temperature conditions. The aging test chamber generates heat through a heater to raise the temperature inside the chamber, and then carries the heat into the chamber through an internal air circulation system, so that the temperature distribution inside the chamber is uniform.

[0003] However, the existing air circulation system has an unreasonable structure of circulation duct and heating wire layout, which affects the uniformity of temperature distribution and the heating rate, making it difficult to guarantee a uniform test temperature for the product and shorten the test cycle. Summary of the Invention

[0004] The purpose of this invention is to provide an air-exchange thermal aging test chamber that can provide a uniformly distributed aging temperature for the product under test, while also having a fast heating rate, thus shortening the product aging test cycle.

[0005] To solve the above-mentioned technical problems, this utility model provides a ventilation-type thermal aging test chamber, including a chamber body, wherein the chamber body is provided with an inner shell and an outer shell; and further comprising:

[0006] The circulating air duct is provided in two parts. The left and right circulating air ducts are respectively the left and right cavities divided by the inner cavity between the inner shell and the outer shell. Several electric heating wires are arranged in the circulating air duct. A circulating fan is installed at one end of the circulating air duct.

[0007] An air inlet grille and an air outlet grille are respectively provided at the bottom and top of the inner shell, for connecting with the air inlet and air outlet of the circulating air duct;

[0008] A rotating mesh disk is rotatably mounted on the bottom of the inner shell, and the drive shaft end of the rotating mesh disk is connected to the output end of a drive motor, which is installed inside the housing.

[0009] Preferably, the two circulating air ducts on the left and right are arranged in an inverted L-shaped cavity structure, and two circulating fans are installed at one end of each circulating air duct.

[0010] Preferably, the air inlet grilles are evenly distributed at the bottom of the inner shell above the circulating fan, and the air outlet grilles are evenly distributed along the top of the inner shell.

[0011] Preferably, the electric heating wire is arranged in an S-shape, U-shape or spiral shape along the path of the circulating air duct.

[0012] Preferably, the inner shell has symmetrical brackets on its left and right inner sidewalls for locking and fixing the partition.

[0013] Preferably, the top left and right sides of the outer casing are respectively provided with air inlet valve ports that communicate with the outside for installing air inlet valves, and the bottom rear sidewall of the outer casing is respectively provided with exhaust valve ports that communicate with the outside for installing exhaust valves.

[0014] Compared with the prior art, this utility model has the following advantages:

[0015] This invention utilizes two symmetrically arranged large-capacity circulating air ducts to increase the surface area of ​​the circulating hot air. Combined with the inlet and outlet air grilles, the circulating hot airflow is evenly distributed onto the product under test via the outlet grille. Simultaneously, a drive motor rotates the product under test at low speed, ensuring more thorough and even contact with the circulating hot airflow inside the shell, further enhancing temperature uniformity. Furthermore, the electric heating wires are arranged in an S-shape, U-shape, or spiral pattern along the circulating air ducts. By extending the path and area, the heating efficiency is improved, shortening the aging test cycle. Attached Figure Description

[0016] Figure 1 This is a front view of the structure of a ventilation-type thermal aging test chamber according to this utility model.

[0017] Figure 2 This is an internal structural diagram of a ventilation-type thermal aging test chamber according to this utility model.

[0018] Figure 3 This utility model Figure 2 The structural bottom view.

[0019] Figure 4 This is a structural cross-sectional view of an air-exchange thermal aging test chamber according to this utility model.

[0020] In the diagram: 1-box body, 2-inner shell, 3-outer shell, 4-circulating air duct, 41-circulating fan, 42-inlet grille, 43-outlet grille, 5-rotating screen, 51-drive motor, 6-bracket, 7-inlet valve, 8-exhaust valve. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0022] like Figures 1-4 As shown, this utility model embodiment provides a ventilation-type thermal aging test chamber, including a chamber body 1, a door on the chamber body 1, and an inner shell 2 and an outer shell 3 inside the chamber body 1; it also includes:

[0023] There are two circulating air ducts 4, one on the left and one on the right. The two circulating air ducts 4 are the left and right cavities divided by the inner cavity between the inner shell 2 and the outer shell 3. They are divided by the dividing plate on the top of the inner shell 2 to form independent large-capacity air duct structures, which increases the area of ​​circulating hot air. Several electric heating wires are arranged in the circulating air duct 4 to heat the air. A circulating fan 41 is installed at one end of the circulating air duct 4 to provide hot air circulation. In order to ensure a constant temperature effect, a temperature sensor can be arranged in the circulating air duct 4 to realize the constant temperature detection function.

[0024] The air inlet grille 42 and the air outlet grille 43 are respectively opened at the bottom and top of the inner shell 2, and are used to connect with the air inlet and air outlet of the circulating air duct 4. In conjunction with the circulating fan 41, the circulating hot air can be sprayed out through the air outlet grille 43 and flow evenly onto the product to be tested.

[0025] The rotating mesh disk 5 is rotatably mounted on the bottom of the inner shell 2, and the drive shaft end of the rotating mesh disk 5 is connected to the output end of the drive motor 51. The drive motor 51 is installed inside the housing 1. After the product to be tested is fixed to the external fixed bracket, it is placed and locked on the rotating mesh disk 5. The drive motor 51 drives the rotation, causing the product to rotate at a low speed, so that it can have more full and even contact with the hot airflow circulating inside the inner shell 2, further improving the effect of uniform temperature distribution.

[0026] The two circulating air ducts 4 on the left and right are arranged in an inverted L-shaped cavity structure, and two circulating fans 41 are installed at one end of each circulating air duct 4 to provide strong power for the large-capacity circulating air duct 4.

[0027] The air inlet grilles 42 are evenly distributed at the bottom of the inner shell 2 above the circulating fan 41, and the air outlet grilles 43 are evenly distributed along the top of the inner shell 2, which can further distribute the circulating hot airflow evenly.

[0028] The electric heating wire is arranged in an S-shape, U-shape or spiral shape along the path of the circulating air duct 4. By extending the arrangement path and area, the heating efficiency can be improved.

[0029] The inner shell 2 is symmetrically provided with brackets 6 on the left and right inner side walls for locking and fixing the partition. It can be used independently in conjunction with the rotating mesh disk 5. When testing products that are not suitable for rotation, it can be placed directly on the partition for aging test to further enhance its backup performance.

[0030] The top left and right sides of the outer casing 3 are respectively provided with air inlet valve ports 7 that are connected to the outside for installing air inlet valves. The bottom rear side wall of the outer casing 3 is respectively provided with exhaust valve ports 8 that are connected to the outside for installing exhaust valves. Both the air inlet valve and the exhaust valve are electric ball valves. By switching and coordinating the air inlet valve and the exhaust valve, the air exchange of the aging test chamber can be realized.

[0031] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A hot air aging test chamber of the air exchange type, comprising a cabinet (1) inside which an inner shell (2) and an outer shell (3) are provided; characterized by the fact that, Also include: Circulating air duct (4), two, left and right two said circulating air duct (4) is the left and right cavity respectively for the inner cavity between the inner shell (2) and the outer shell (3) is divided, and the circulating air duct (4) is provided with a plurality of electric heating wire, one end of the circulating air duct (4) is provided with circulating fan (41); Air inlet grid (42) and air outlet grid (43) are respectively provided in the bottom and top of the inner shell (2), which are connected with the air inlet end and air outlet end of the circulating air duct (4); Rotary mesh disc (5) is rotatably installed at the bottom of the inner shell (2), and the driving shaft end of the rotary mesh disc (5) is connected with the output end of the driving motor (51), and the driving motor (51) is installed in the box (1).

2. A hot air aeration test chamber as claimed in claim 1, characterized in that The left and right two circulating air ducts (4) are arranged in inverted L-shaped cavity structure, and two circulating fans (41) are installed at one end of each circulating air duct (4).

3. The air-to-air thermal aging test chamber of claim 1 wherein, The air inlet grid (42) is uniformly provided in the corresponding inner shell (2) bottom above the circulating fan (41), and the air outlet grid (43) is uniformly provided along the top of the inner shell (2).

4. The air-to-air thermal aging test chamber of claim 1 wherein, The electric heating wire is arranged in S type, U type or spiral type along the path of the circulating air duct (4).

5. The air-to-air thermal aging test chamber of claim 1 wherein, The left and right inner side walls of the inner shell (2) are respectively provided with symmetrically arranged supports (6) for locking and fixing the placed partition plate.

6. A hot air oven according to any one of claims 1 to 5, wherein The top left and right sides of the outer shell (3) are respectively provided with air inlet valve port (7) connected with the outside, for installing air inlet valve, and the bottom left and right sides of the rear wall of the outer shell (3) are respectively provided with air outlet valve port (8) connected with the outside, for installing air outlet valve.

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