Rapid temperature change damp heat test box with wind speed adjusting device

Abstract

The utility model relates to a rapid temperature change damp heat test box with a wind speed adjusting device, which comprises a box body, a front cavity and a rear cavity are arranged in the box body, the bottom of the rear cavity is provided with an air return port communicated with the front cavity, the top of the rear cavity is provided with a centrifugal fan, the top of the front cavity is provided with a support frame communicated with an air outlet of the centrifugal fan, and the air speed adjusting device is arranged on the support frame. The pore plate is movably arranged in the support frame, the air holes are formed in the pore plate at intervals, and the driving device for driving the pore plate to open and close is arranged on the box body, so that the overall temperature uniformity of a test area is improved, the humidity deviation is reduced, and the stability and reliability requirements of the test are ensured on the premise of ensuring rapid temperature rising and cooling.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature change test chambers, and particularly relates to a rapid temperature change and humidity test chamber with a wind speed regulating device. Background Technique

[0002] With the development of the times and the progress of technology, the requirements for product quality and reliability are getting higher and higher. With the increasing maturity of traditional reliability test technologies, in order to improve product reliability, shorten the development cycle, and reduce test costs, accelerated test technologies are being increasingly emphasized by the reliability engineering circles at home and abroad, and the performance requirements for rapid temperature change and humidity test chambers are also getting higher and higher.

[0003] At present, the structure of the rapid temperature change and humidity test chambers on the market is simple, mainly adopting an upper air outlet and lower air return structure. In order to achieve rapid temperature rise and fall, high-power fans are used, and the wind speed is extremely high. The too-fast air flow speed will accelerate heat transfer, resulting in a lower temperature measured by the sensor and affecting the measurement accuracy; the uniformity of humidity is mainly affected by air convection, and humidity is mainly affected by temperature. To ensure the humidity uniformity, the precondition is that the temperature uniformity is also good. Content of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a rapid temperature change and humidity test chamber with a wind speed regulating device.

[0005] The purpose of the utility model can be realized by the following technical solutions: A rapid temperature change and humidity test chamber with a wind speed regulating device includes a box body. A front cavity and a rear cavity are arranged inside the box body. A return air port communicating with the front cavity is arranged at the bottom of the rear cavity. A centrifugal fan is arranged at the top of the rear cavity. A support frame communicating with the air outlet of the centrifugal fan is installed at the top of the front cavity. A hole plate is movably arranged inside the support frame. Wind holes are spacedly arranged on the hole plate. A driving device for driving the opening and closing of the hole plate is arranged on the box body.

[0006] Preferably, the hole pitch of the wind holes is evenly distributed.

[0007] Preferably, the driving device is a cylinder.

[0008] Preferably, a sealing sleeve is arranged on the box body, and the output shaft of the cylinder is closely attached to the sealing sleeve.

[0009] Preferably, sensors are arranged at both the upper end and the lower end of the cylinder body of the cylinder, and a magnetic ring is arranged on the piston of the cylinder.

[0010] The beneficial effects of the present utility model are as follows: By movably arranging an orifice plate at the air outlet of the centrifugal fan and using a cylinder to control the lifting of the orifice plate, when heating or cooling, the orifice plate rises, and the air directly blows into the front cavity, maximizing the wind speed and accelerating the heating and cooling rate; when entering the constant temperature state after reaching the set temperature, the orifice plate descends, enabling the air to be dispersed through the air holes and then blow into the front cavity, improving the temperature uniformity in the front cavity; on the premise of ensuring rapid heating and cooling, the overall temperature uniformity of the test area is improved, the humidity deviation is reduced, and the stability and reliability requirements of the test are ensured. Description of the Drawings

[0011] The present utility model will be further described with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation to the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the following drawings.

[0012] Figure 1 It is a schematic structural diagram of a rapid temperature change and humidity test chamber with a wind speed adjustment device of the present utility model.

[0013] Figure 2 It is another schematic structural diagram of a rapid temperature change and humidity test chamber with a wind speed adjustment device of the present utility model.

[0014] Figure 3 It is a schematic orifice plate structure diagram of a rapid temperature change and humidity test chamber with a wind speed adjustment device of the present utility model.

[0015] Figure 4 For Figure 1 The partial enlarged view at position A in

[0016] The reference numerals shown in the figure are represented as: 1, box body; 2, front cavity; 3, rear cavity; 4, evaporator; 5, heating wire; 6, air return opening; 7, centrifugal fan; 8, orifice plate; 801, air holes; 9, driving device; 10, support frame; 11, sealing sleeve; 12, sensor. Detailed Embodiment

[0017] It should be noted that if there are directional indications (such as up, down, left, right, front, rear...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If this specific posture changes, the directional indications will also change accordingly.

[0018] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions conflicts with each other or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0019] The technical solution of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work belong to the protection scope of the present utility model.

[0020] Refer to Figures 1 to 4 As shown, the structure of the present utility model is: a rapid temperature change and damp heat test chamber with a wind speed adjustment device, including a box body 1. Inside the box body 1, there is a front cavity 2 and a rear cavity 3. At the bottom of the rear cavity 3, there is an air return opening 6 communicating with the front cavity 2. At the top of the rear cavity 3, there is a centrifugal fan 7. At the top of the front cavity 2, there is a support frame 10 communicating with the air outlet of the centrifugal fan 7. Inside the support frame 10, there is a perforated plate 8 movably arranged. On the perforated plate 8, air holes 801 are spaced apart. On the box body 1, there is a driving device 9 for driving the opening and closing of the perforated plate 8. The driving device is a cylinder. Specifically, during the test, the sample is placed in the front cavity 2. Subsequently, the heating wire 5 or the evaporator 4 in the rear cavity 3 works to heat or cool the air in the rear cavity 3. At the same time, the driving device 9 drives the perforated plate 8 to rise. Then, the air in the rear cavity 3 is directly sent into the front cavity 2 through the centrifugal fan 7 to accelerate the air circulation, thereby increasing the heating and cooling rate in the front cavity 2. Subsequently, the air in the front cavity 2 enters the rear cavity 3 through the air return opening 6. When the front cavity 2 reaches the set temperature and enters the constant temperature state, the cylinder drives the perforated plate 8 to descend and closely fit with the support frame 10, so that the air blown out by the centrifugal fan 7 enters the front cavity 2 after being dispersed through the air holes 801, thereby improving the temperature uniformity in the front cavity 2.

[0021] As Figure 3 shown, the hole pitches of the air holes 801 are evenly distributed. Specifically, the air blown out by the centrifugal fan 7 enters the front cavity 2 through the air holes 801 with evenly distributed hole pitches, which can further make the temperature more uniform. The aperture and hole pitch of the air holes 801 can be determined according to the test requirements.

[0022] As Figure 4 shown, on the box body 1, there is a sealing sleeve 11. The output shaft of the cylinder is closely fitted with the sealing sleeve 11. Specifically, the sealing sleeve 11 can not only be used to seal the front cavity 2 to prevent external air from entering the front cavity 2 through the gap between the output shaft of the cylinder and the box body 1 and affecting the test environment, but also prevent hot and cold air and moisture from entering the inside of the cylinder, enabling the cylinder to be stably used in extremely harsh high and low temperature and damp heat environments for a long time and extending the service life of the cylinder.

[0023] As Figure 1 、 Figure 2As shown, sensors 12 are provided at both the upper and lower ends of the cylinder block. A magnetic ring is provided on the piston of the cylinder. Specifically, the sensor 12 can sense the magnetic ring on the piston inside the cylinder. By adjusting the installation positions of the upper and lower sensors 12, the stroke of the cylinder can be adjusted, thereby controlling the upper and lower limits of the orifice plate 8.

[0024] During specific use, when conducting an experiment, the sample is placed into the front cavity 2. Subsequently, the heating wire 5 or the evaporator 4 in the rear cavity 3 operates to heat or cool the air in the rear cavity 3. At the same time, the cylinder drives the orifice plate 8 to rise and separate (as Figure 2 shown). Subsequently, the air in the rear cavity 3 is directly sent into the front cavity 2 through the centrifugal fan 7 to accelerate the air circulation, thereby increasing the heating and cooling rate in the front cavity 2. Subsequently, the air in the front cavity 2 enters the rear cavity 3 through the air return port 6. When the front cavity 2 reaches the set temperature and enters the constant temperature state, the cylinder drives the orifice plate 8 to descend and closely fit with the support frame 10 (as Figure 1 shown), enabling the air blown out by the centrifugal fan 7 to enter the front cavity 2 through the orifice plate 8, reducing the wind speed, and thereby improving the temperature uniformity in the front cavity 2.

[0025] The above further describes the present invention with the aid of specific embodiments. However, it should be understood that this specific description should not be construed as a limitation on the essence and scope of the present invention. Various modifications made by those of ordinary skill in the art to the above embodiments after reading this specification all fall within the scope protected by the present invention.

Claims

1. A rapid temperature change and damp heat test chamber with a wind speed adjusting device, characterized in that: It includes a box body (1). Inside the box body (1), there is a front cavity (2) and a rear cavity (3). At the bottom of the rear cavity (3), there is an air return opening (6) communicating with the front cavity (2). At the top of the rear cavity (3), there is a centrifugal fan (7). At the top of the front cavity (2), a support frame (10) communicating with the air outlet of the centrifugal fan (7) is installed. A perforated plate (8) is movably arranged inside the support frame (10). Air holes (801) are spacedly arranged on the perforated plate (8). On the box body (1), there is a driving device (9) for driving the perforated plate (8) to open and close.

2. The rapid temperature change and damp heat test chamber with a wind speed adjustment device according to claim 1, characterized in that: The hole pitches of the air holes (801) are evenly distributed.

3. The rapid temperature change and damp heat test chamber with a wind speed adjustment device according to claim 1, characterized in that: The driving device (9) is a cylinder.

4. A rapid temperature change and damp heat test chamber with a wind speed adjustment device according to claim 3, characterized in that: A sealing sleeve (11) is arranged on the box body (1), and the output shaft of the cylinder is closely attached to the sealing sleeve (11).

5. The rapid temperature change and damp heat test chamber with a wind speed regulating device according to claim 3, wherein: Sensors (12) are arranged at both the upper end and the lower end of the cylinder body of the cylinder, and a magnetic ring is arranged on the piston of the cylinder.

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