CN205550307U - A constant temperature and humidity test chamber - Google Patents

Abstract

The utility model discloses a constant temperature and humidity test box, including experimental box, the internal refrigeration subassembly, heating element and the humidification subassembly of being provided with of test box, the internal circulating fan that is provided with of test box still is provided with on the experimental box and goes into gaseous intake pipe and be used for the blast pipe with the inside gas outgoing of box to the box inside thigh, intake-tube connection drying blower's air exit all installs an electromagnetic control valve in blast pipe and the intake pipe, inside temperature sensor and the humidity transducer of being provided with of box, the outside of experimental box is provided with the PLC controller. The utility model has the advantages that: the operation is convenient, the high and low temperature environment can be quickly converted, and the operation stability is high; simple structure, easy manufacture and assembly, low operation cost in use, long service life and higher temperature control precision.

Description

A constant temperature and humidity test chamber

technical field

The utility model relates to a constant temperature and humidity test box.

Background technique

Constant temperature and humidity test chamber is used to test the performance of materials in various environments and test the heat resistance, cold resistance, dry resistance and humidity resistance of various materials. It is suitable for electrical, electronic, instrumentation and other products, parts and materials. Adaptability test for storage, transportation and use in high and low temperature environments; it is a reliability testing equipment for cold resistance, heat resistance, humidity resistance tests and quality control engineering of various electronic, electrical, electrical, plastic and other raw materials and devices; especially suitable for High temperature resistance and low temperature resistance cycle test of optical fiber, LED, crystal, inductor, PCB, battery, computer, mobile phone and other products. Due to the limitation of its principle, the test chamber in the prior art has high operating cost, large power consumption and high maintenance cost. At present, the constant temperature and humidity test chambers used in daily life can perform temperature tests at 0°C-150°C, but the environment inside the chamber will not be accurately controlled.

Contents of the invention

The purpose of the utility model is to overcome the shortcomings of the prior art and provide a constant temperature and humidity test chamber with convenient operation and high control precision.

The purpose of the utility model is achieved through the following technical solutions: a constant temperature and humidity test box, including a test box body, the test box body is provided with a refrigeration assembly, a heating assembly and a humidification assembly, and the test box body is provided with a The test box is equipped with a circulating fan, and the test box is also equipped with an air inlet pipe that feeds the gas into the box and an exhaust pipe for discharging the gas inside the box. The air inlet pipe is connected to the drying fan. An electromagnetic control valve is installed on the air exhaust port, exhaust pipe and air intake pipe. Temperature sensors and humidity sensors are installed inside the box. PLC controllers are installed outside the test box. Refrigeration components, heating components, humidification components, Circulation fan, drying fan, temperature sensor, humidity sensor, and electromagnetic control valves on the exhaust pipe and air intake pipe are respectively connected to the PLC controller.

It is easy to operate, can quickly switch between high and low temperature or hot and humid environments, and has high operating stability; simple structure, easy manufacturing and assembly, low operating costs during use, long service life, and high temperature and humidity control accuracy. The high degree of automation and good sealing effect make the experimental results more accurate.

The air intake pipe is arranged on the upper part of the box body, and the exhaust pipe is arranged on the lower part of the box body. The hot air has a tendency to flow upward, so that the fresh air can fully exchange heat with the hot air during the downward flow, which is beneficial to the uniformity of the temperature inside the box.

The air outlet of the circulating fan is provided with a first net plate and a second net plate in sequence along the airflow direction, and the first net plate and the second net plate are respectively provided with several mesh holes. The apertures of the mesh holes of the second mesh plate decrease sequentially from top to bottom or the number of mesh holes of the second mesh plate decreases successively from top to bottom. When the gas flows through the first mesh plate and the second mesh plate, the first mesh plate The stencil and the second stencil can control the flow rate of the gas from top to bottom, so that the gas flow in the test chamber is uniform, avoiding the occurrence of air turbulence, so that the constant temperature and humidity test chamber can meet the test requirements of low flow rate.

The test box includes a shell and a glass-ceramic container arranged inside the shell, the heating assembly is an electric heating film coated on the outer surface of the glass-ceramic container, and the cooling assembly and humidifying assembly are set inside a glass-ceramic container. The external heating mode can avoid the life of the heating component being affected by the change of the test environment. At the same time, the electric heating film heating method is adopted, which can heat evenly, save energy consumption, and have high heating efficiency.

The housing is provided with a box door, and the glass-ceramic container is provided with an opening at the position of the door, so that workpieces can be placed in the glass-ceramic container through the box door.

A double-layer high-temperature and low-temperature-resistant high-tensile sealing strip is used between the shell and the door to ensure the sealing of the test area.

The test box is also provided with an alarm, which is connected with the PLC controller, so that when the temperature of the device exceeds the limit range, it can automatically alarm, and the safety performance is good.

It also includes an industrial computer and a camera, and the industrial computer is respectively connected to the PLC controller and the camera through a wired or wireless network. The test box is provided with an observation window, the inside of the test box is provided with a lighting lamp, the camera is arranged outside the observation window, and the internal image of the box is taken through the observation window, so that the real-time image can be viewed remotely through the industrial computer during the test and Control related parameters.

The utility model has the following advantages:

It is easy to operate, can quickly switch between high and low temperature or hot and humid environments, and has high operating stability; simple structure, easy manufacturing and assembly, low operating costs during use, long service life, and high temperature and humidity control accuracy. The high degree of automation and good sealing effect make the experimental results more accurate.

The external heating mode can avoid the life of the heating component being affected by the change of the test environment. At the same time, the electric heating film heating method is adopted, which can heat evenly, save energy consumption, and have high heating efficiency.

By setting the camera, the test process can remotely view real-time images and control related parameters through the industrial computer.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the internal structure of the utility model.

In the figure, 1-test box, 2-refrigeration component, 3-heating component, 4-support, 5-circulation fan, 6-exhaust pipe, 7-intake pipe, 8-temperature sensor, 9-PLC controller, 10-shell, 11-glass-ceramic container, 12-door, 13-observation window, 14-camera, 15-humidification component, 16-humidity sensor, 17-drying fan, 18-first screen, 19 - Second stencil.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Figures 1 and 2, a constant temperature and humidity test chamber includes a test chamber 1, and the test chamber 1 is provided with a refrigeration assembly 2, a heating assembly 3 and a humidification assembly 15. A bracket 4 for placing workpieces is provided, a circulating fan 5 is arranged in the test box 1, and an air inlet pipe 7 for feeding gas into the inside of the box and a gas inlet for discharging the gas inside the box are also arranged on the test box 1. The exhaust pipe 6 and the air inlet pipe 7 are connected to the air outlet of the drying fan 17. An electromagnetic control valve is installed on the exhaust pipe 6 and the air inlet pipe 7. A temperature sensor 8 and a humidity sensor 16 are arranged inside the box body. The outside of the body 1 is provided with a PLC controller 9, a cooling assembly 2, a heating assembly 3, a humidification assembly 15, a circulating fan 5, a drying fan 17, a temperature sensor 8, a humidity sensor 16, and the exhaust pipe 6 and the intake pipe 7. The electromagnetic control valves are connected to the PLC controller 9 respectively.

It is easy to operate, can quickly switch between high and low temperature or hot and humid environments, and has high operating stability; simple structure, easy manufacturing and assembly, low operating costs during use, long service life, and high temperature and humidity control accuracy. The high degree of automation and good sealing effect make the experimental results more accurate.

The air intake pipe 7 is arranged on the upper part of the casing, and the exhaust pipe 6 is arranged on the lower part of the casing. The hot air has a tendency to flow upward, so that the fresh air can fully exchange heat with the hot air during the downward flow, which is beneficial to the uniformity of the temperature inside the box.

The air outlet of the circulating fan 5 is provided with a first mesh plate 18 and a second mesh plate 19 in sequence along the airflow direction, and the first mesh plate 18 and the second mesh plate 19 are respectively provided with several mesh holes. The aperture of the mesh of the second net plate 19 decreases successively from top to bottom or the quantity of the mesh of the second net plate 19 decreases successively from top to bottom, when the gas flows through the first net plate 18 and the second net plate 19 At the same time, the first net plate 18 and the second net plate 19 can control the flow rate of the gas from top to bottom, so that the gas flow in the test chamber is uniform, avoiding the occurrence of air flow disturbance, so that the constant temperature and humidity test chamber can meet the requirements of low flow rate. Testing requirements.

The test chamber 1 includes a housing 10 and a glass-ceramic container 11 arranged inside the housing 10, the heating assembly 3 is an electric heating film coated on the outer surface of the glass-ceramic container 11, and the The cooling assembly 2 and the humidifying assembly 15 are arranged inside the glass-ceramic container 11 . The external heating mode can prevent the life of the heating component 3 from being affected by changes in the test environment. At the same time, the electrothermal film heating method is used to achieve uniform heating, save energy consumption, and have high heating efficiency.

The casing 10 is provided with a box door 12 , and the glass-ceramic container 11 is provided with an opening at the position of the door 12 , so that workpieces can be placed in the glass-ceramic container 11 through the box door 12 .

A double-layer high-temperature resistant high-tensile sealing strip is used between the casing 10 and the box door 12 to ensure the sealing of the test area.

The test box 1 is also provided with an alarm, which is connected with the PLC controller 9, so that when the temperature of the device exceeds the limit range, it can automatically alarm, and the safety performance is good.

It also includes an industrial computer and a camera 14, and the industrial computer is respectively connected to the PLC controller 9 and the camera 14 through a wired or wireless network. The test box 1 is provided with an observation window 13, the inside of the test box 1 is provided with a lighting lamp, and the camera 14 is arranged outside the observation window 13, and the internal image of the box is taken through the observation window 13, so that the test process can pass The industrial computer can remotely view real-time images and control related parameters.

Claims (7)

1. A constant temperature and humidity test chamber, characterized in that: it includes a test chamber (1), and the test chamber (1) is provided with a refrigeration assembly (2), a heating assembly (3) and a humidification assembly (15 ), the test box (1) is provided with a bracket (4) for placing workpieces, the test box (1) is provided with a circulating fan (5), and the test box (1) is also provided with a The air intake pipe (7) for entering the gas and the exhaust pipe (6) for discharging the gas inside the box, the air intake pipe (7) is connected to the exhaust port of the drying fan (17), the exhaust pipe (6) and An electromagnetic control valve is installed on the intake pipe (7), a temperature sensor (8) and a humidity sensor (16) are installed inside the box, a PLC controller (9) is installed outside the test box (1), and a refrigeration unit (2), heating assembly (3), humidification assembly (15), circulation fan (5), drying fan (17), temperature sensor (8), humidity sensor (16), exhaust pipe (6) and air intake pipe The electromagnetic control valves on (7) are respectively connected to the PLC controller (9). 2. A constant temperature and humidity test chamber according to claim 1, characterized in that: the air intake pipe (7) is arranged on the upper part of the box body, and the exhaust pipe (6) is arranged on the lower part of the box body . 3. A constant temperature and humidity test chamber according to claim 1, characterized in that: the air outlet of the circulating fan (5) is sequentially provided with a first mesh plate (18) and a second mesh plate along the airflow direction The plate (19), the first net plate (18) and the second net plate (19) are respectively provided with several mesh holes. 4. A constant temperature and humidity test chamber according to claim 1, characterized in that: the test chamber (1) includes a shell (10) and a glass-ceramic container arranged inside the shell (10) (11), the heating component (3) is an electric heating film coated on the outer surface of the glass-ceramic container (11), and the cooling component (2) and humidifying component (15) are arranged in the glass-ceramic container (11) INTERNAL. 5. A constant temperature and humidity test chamber according to claim 4, characterized in that: the housing (10) is provided with a door (12), and the glass-ceramic container (11) is located on the door An opening is provided at the position of (12). 6. A constant temperature and humidity test chamber according to claim 1, characterized in that: the test chamber (1) is also provided with an alarm, which is connected to the PLC controller (9). 7. A constant temperature and humidity test chamber according to claim 1, characterized in that: it also includes an industrial computer and a camera (14), and the industrial computer is respectively connected to the PLC controller (9) and the camera (14) through a wired or wireless network ), the test box (1) is provided with an observation window (13), the interior of the test box (1) is provided with a lighting lamp, and the camera (14) is provided outside the observation window (13).