An instrument temperature and humidity tester

Abstract

The present invention relates to the technical field of instrument testing equipment, and specifically to an instrument temperature and humidity tester, comprising a body and a partition; the body is divided into an upper and lower part by the partition, the upper part is a test chamber, and the lower part is an equipment chamber; a telescopic device is provided on the inner wall of the top surface of the test chamber, and a temperature and humidity sensor is fixedly arranged at the bottom of the telescopic device; a cold box and a hot box are provided on the inner wall of the bottom surface of the test chamber, and a dehumidifier is provided on the inner wall of the side surface of the test chamber; a water-cooled chiller and a hot air blower are provided on the inner wall of the bottom surface of the equipment chamber, the cold water pipe of the water-cooled chiller passes through the partition and extends into the cold box, and the hot air pipe of the hot air blower passes through the partition and is connected to an air distributor arranged in the hot box; the device solves the problems of the existing instrument temperature and humidity tester having a small measurement range due to a single heat source or a cold source and a large measurement error due to uneven temperature distribution in the test chamber.

Description

Technical Field

[0001] The invention relates to the technical field of instrument testing equipment, and in particular to an instrument temperature and humidity tester. Background Art

[0002] As a temperature and humidity source, the temperature and humidity tester provides a stable and uniform temperature and humidity field. As a standard device for temperature and humidity, the precision dew point meter measures and displays the temperature and humidity in the temperature and humidity field. The precision dew point meter and the instrument under test are placed in the calibration box at the same time. After the temperature and humidity reach equilibrium and stability, the standard value and the indication of the instrument under test are read respectively. The two are compared to determine whether the instrument under test is qualified. Therefore, the uniformity and stability of the temperature and humidity in the temperature and humidity field will directly affect the calibration results. The instability and unevenness of the humidity in the calibration box are mainly caused by the instability and unevenness of the temperature. To improve the stability and uniformity of the humidity in the calibration box, it is essentially mainly to improve the stability and uniformity of the temperature in the calibration box.

[0003] Chinese patent CN202020143236.1 discloses a temperature and humidity calibration box with a monitoring mechanism, including a base, a monitoring device, a control device and a closing device, wherein an operation box is fixedly installed on the top of the base, a monitoring device is fixedly installed on the side wall of the operation box, one side of the operation box is rotatably connected with a closing device through a hinge, a control device is fixedly installed on the outside of the closing device, a base is fixedly installed on the inner bottom end of the operation box, a vertical plate is fixedly installed on one side of the top of the base, a hanging frame is fixedly installed on one side of the top of the vertical plate, a groove is opened on the top of the base, a receiving plate is slidably connected in the groove at the top of the base, a pressure sensor is fixedly installed between the base and the receiving plate, and the output end of the pressure sensor is interconnected with the monitor. This temperature and humidity calibration box with a monitoring mechanism has a simple structure, convenient operation, can monitor objects in the equipment, and has high practicality.

[0004] Most existing equipment uses a single heat source or cold source for heating or cooling. This setting easily leads to a narrowing of the temperature range of the measured instrument and a long measurement time, which is difficult to match with actual applications. In addition, due to the poor thermal conductivity of air, it is easy to cause uneven temperature distribution in the measurement box, resulting in the temperature at the instrument being inconsistent with the temperature at the temperature and humidity sensor inside the box, increasing the measurement error. Therefore, it is necessary to develop an instrument temperature and humidity tester with a wide measurement range, high measurement efficiency and small measurement error. Summary of the invention

[0005] The purpose of the present invention is to provide an instrument temperature and humidity tester, which solves the problems of the existing instrument temperature and humidity tester having a small measurement range due to a single heat source or a cold source and a large measurement error due to uneven temperature distribution in a test chamber.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] The present invention provides an instrument temperature and humidity tester, comprising a body and a partition; the body is divided into an upper and lower part by the partition, the upper part is a test chamber, and the lower part is an equipment chamber; a telescopic device, such as an electric telescopic rod, is provided on the inner wall of the top surface of the test chamber, and a temperature and humidity sensor is fixedly arranged at the bottom of the telescopic device; a cold box and a hot box are provided on the inner wall of the bottom surface of the test chamber, and a dehumidifier is provided on the inner wall of the side surface of the test chamber; a water-cooled chiller and a hot air blower are provided on the inner wall of the bottom surface of the equipment chamber, the cold water pipe of the water-cooled chiller passes through the partition and extends into the cold box, and the hot air pipe of the hot air blower passes through the partition and is connected to an air distributor arranged in the hot box; a first support plate and a second support plate are fixedly provided on the inner wall of the side surface of the equipment chamber, a motor is provided on the first support plate, a transmission rod is fixedly provided on the output end of the motor, the transmission rod passes through the partition and extends into the hot box, a turntable is fixedly provided on the top of the transmission rod, and the turntable is located below the temperature and humidity sensor; a humidifier is provided on the second support plate, and the output end of the humidifier passes through the partition and extends into the hot box.

[0008] Furthermore, one side of the test chamber is closed, and the other side corresponding thereto is a chamber door, and a second observation window is provided on the chamber door.

[0009] Furthermore, another pair of side surfaces of the test chamber are provided with first observation windows.

[0010] Furthermore, a first fan close to the cold box and a second fan close to the hot box are respectively arranged on another pair of side surfaces of the test chamber, and the position of the first fan is lower than that of the second fan.

[0011] Furthermore, a third fan is provided on one end of the inner wall of the top surface of the test chamber near the first fan, and the first fan, the second fan, the third fan and the air distributor can form a circulating air duct in the test chamber.

[0012] Furthermore, an image acquisition device, such as a camera, is provided on the upper portion of the outer wall of the test chamber where the second observation window is provided.

[0013] Furthermore, a control panel is provided on the side outer wall of the main body; the first fan, motor, water-cooled chiller, hot air blower, humidifier, dehumidifier, temperature and humidity sensor, second fan, telescopic device, third fan and image acquisition device are all connected to the control panel.

[0014] Furthermore, the first fan, motor, water-cooled chiller, hot air blower, humidifier, dehumidifier, second fan, telescopic device and third fan are all electrically connected to the control panel, and the temperature and humidity sensor and image acquisition device are electrically or wirelessly connected to the control panel.

[0015] Furthermore, the cold water pipes are distributed in an M shape.

[0016] Furthermore, the inner wall of the test chamber is provided with a heat-insulating structure.

[0017] Technical effects of the present invention:

[0018] Compared with the prior art, the instrument temperature and humidity tester involved in the present invention increases the temperature range of the instrument test by setting a combination of a heat source and a cold source, more accurately controls the temperature in the test chamber, and improves the test efficiency; by setting the internal circulation wind of the air distributor-the second fan-the third fan-the first fan, the air in the test chamber moves regularly, thereby accelerating the transfer of heat in the air, and effectively solving the measurement error caused by the uneven temperature distribution in the test chamber; by setting the temperature and humidity sensor under the telescopic device, the temperature and humidity sensor of the test chamber is kept as consistent as possible with the environment of the test instrument, and by setting a turntable, the instrument is fully in contact with the surrounding environment, and through the synergistic effect of the two and the internal circulation wind, the measurement error caused by the uneven temperature distribution is further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structural principle of the present invention;

[0020] Figure 2 for Figure 1 AA section view in the figure;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Wherein: 1 body, 2 test chamber, 3 turntable, 4 first fan, 5 transmission rod, 6 control panel, 7 cold box, 8 equipment chamber, 9 motor, 10 water-cooled chiller, 11 hot air blower, 12 humidifier, 13 hot box, 14 dehumidifier, 15 temperature and humidity sensor, 16 second fan, 17 electric telescopic rod, 18 third fan, 19 cold water pipe, 20 air distributor, 21 partition, 22 first observation window, 23 second observation window, 24 box door, 25 camera, 26 roller, 27 first support plate, 28 second support plate, 29 hot air pipe, 30 heat dissipation hole group. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0024] Example:

[0025] like Figure 1-3As shown, an instrument temperature and humidity tester described in this embodiment includes a main body 1 and a partition 21; the main body 1 is divided into an upper and lower part by the partition 21, the upper part is a test chamber 2, and the lower part is an equipment chamber 8; an electric telescopic rod 17 is provided on the inner wall of the top surface of the test chamber 2, and a temperature and humidity sensor 15 is fixedly arranged at the bottom of the electric telescopic rod 17; the inner wall of the bottom surface of the test chamber 2 is provided with a cold box 7 and a hot box 13 distributed in an axially symmetrical manner, the cold box 7 and the hot box 13 have the same structure, and a plurality of pairs of heat dissipation hole groups 30 are provided on the surrounding side; a dehumidifier 14 is provided on the inner wall of the side surface of the test chamber 2.

[0026] The inner wall of the bottom surface of the equipment warehouse 8 is provided with a water-cooled chiller 10 and a hot air blower 11. The cold water pipe 19 of the water-cooled chiller 10 passes through the partition 21 and extends into the cold box 7. The cold water pipe 19 is distributed in an M shape. The cold water pipe 19 is used for cooling the test warehouse 2.

[0027] The hot air pipe 29 of the hot air blower 11 passes through the partition 21 and is connected to the air distributor 20 arranged in the hot box 13. The air distributor 20 is used to arrange the input hot air in a matrix manner to increase the contact area between the input hot air and the air in the test chamber 2. By combining the heat source and the cold source, the temperature range of the instrument test is increased, the temperature in the test chamber 2 is more accurately controlled, and the test efficiency is improved.

[0028] A first support plate 27 and a second support plate 28 are fixedly provided on the inner wall of the side of the equipment warehouse 8. A motor 9 is provided on the first support plate 27. A transmission rod 5 is fixedly provided on the output end of the motor 9. The transmission rod 5 passes through the partition 21 and extends to the inside of the hot box 13. A turntable 3 for carrying a test instrument is fixedly provided on the top of the transmission rod 5. The turntable 3 is driven by the motor 9, and then the test instrument on the turntable 3 is driven to rotate, so that the test instrument is in full contact with the surrounding environment, reducing the test error. The turntable 3 is located below the temperature and humidity sensor 15; when working, the electric telescopic rod 17 is controlled to extend downward, driving the temperature and humidity sensor 15 at the bottom of the electric telescopic rod 17 to approach the test instrument, ensuring that the temperature and humidity sensor 15 of the test warehouse 2 is as consistent as possible with the environment of the test instrument, reducing the test error.

[0029] A humidifier 12 is disposed on the second support plate 28 . An output end of the humidifier 12 passes through the partition 21 and extends to the interior of the heat box 13 . The humidifier 12 and the dehumidifier 14 are used to adjust the humidity in the test chamber 2 .

[0030] The testing chamber 2 has one closed side surface, and the other corresponding side surface is a chamber door 24 , and a second observation window 23 is provided on the chamber door 24 .

[0031] The other pair of side surfaces of the test chamber 2 are each provided with a first observation window 22 , and the first observation window 22 and the second observation window 23 are used by staff to observe the situation of the test chamber 2 and ensure the light brightness in the test chamber 2 .

[0032] A first fan 4 close to the cold box 7 and a second fan 16 close to the hot box 13 are respectively disposed on another pair of side surfaces of the test chamber 2 , and the position of the first fan 4 is lower than that of the second fan 16 .

[0033] A third fan 18 is provided at one end of the inner wall of the top surface of the test chamber 2 close to the first fan 4. The first fan 4, the second fan 16, the third fan 18 and the air distributor 20 can form a circulating air duct in the test chamber 2, so that the air in the test chamber 2 moves regularly, thereby accelerating the transfer of heat in the air, and effectively solving the measurement error caused by uneven temperature distribution in the test chamber 2.

[0034] A camera 25 is disposed on the upper portion of the outer wall of the test chamber 2 where the second observation window 23 is opened. The camera 25 is used to capture the values ​​displayed on the instrument.

[0035] A control panel 6 is provided on the side outer wall of the main body 1, and the first fan 4, the motor 9, the water-cooled chiller 10, the hot air blower 11, the humidifier 12, the dehumidifier 14, the temperature and humidity sensor 15, the second fan 16, the electric telescopic rod 17, the third fan 18 and the camera 25 are all electrically connected to the control panel 6. The control panel 6 is used to control the temperature and humidity in the test chamber 2, and can also be used to display the temperature and humidity values ​​output by the temperature and humidity sensor 15 and the record of the instrument display values ​​captured by the camera 25.

[0036] The second observation window 23 is a multi-layer transparent glass structure, and a vacuum is provided between two adjacent layers of glass.

[0037] A roller 26 is disposed at the bottom of the body 1 .

[0038] The inner wall of the test chamber 2 is provided with a heat-insulating structure.

[0039] Specific implementation of the present invention: When performing the instrument temperature test, open the box door 24, place the instrument to be tested at the center of the turntable 3, close the box door 24 and start the motor 9, and then control the electric telescopic rod 17 to extend the temperature and humidity sensor 15 to about 5 cm above the instrument. Then start the water-cooled chiller 10 to cool down the test chamber 2, and start the first fan 4, the second fan 16 and the third fan 18 to speed up the cooling process. After the temperature in the test chamber 2 drops to 10°C, turn off the water-cooled chiller 10, start the hot air blower 11 to heat the test chamber 2, and when the temperature rises to 15°C, 20°C and 30°C respectively, record the instrument temperature at this time through the camera 25, and compare it with the temperature data transmitted by the temperature and humidity sensor 15 in the test chamber 2 at this time to complete the instrument temperature test.

[0040] When performing the instrument humidity test, open the box door 24, place the instrument to be tested at the center of the turntable 3, close the box door 24 and start the motor 9, then control the electric telescopic rod 17 to extend the temperature and humidity sensor 15 to about 5 cm above the instrument. Start the dehumidifier 14 to reduce the humidity in the test chamber 2 to 20RH%, then start the humidifier 12 to increase the humidity in the test chamber 2, and start the first fan 4, the second fan 16 and the third fan 18 at the same time to make the humidity evenly distributed. When the humidity rises to 40RH%, 60RH% and 80RH% respectively, the instrument humidity at this time is recorded by the camera 25, and compared with the humidity data transmitted by the temperature and humidity sensor 15 in the test chamber 2 at this time, and the instrument humidity test is completed.

[0041] The above-mentioned specific implementations are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the product form and style of the above-mentioned specific implementations. Any appropriate changes or modifications made to them by ordinary technicians in the technical field that conform to the claims of the present invention shall fall within the patent protection scope of the present invention.

Claims

1. An instrument temperature and humidity tester, comprising a body and a partition; the body is divided into an upper and lower part by the partition, the upper part is a test chamber, and the lower part is an equipment chamber; characterized in that: The inner wall of the top surface of the test warehouse is provided with a telescopic device, and a temperature and humidity sensor is fixedly arranged at the bottom of the telescopic device; the inner wall of the bottom surface of the test warehouse is provided with a cold box and a hot box, and the inner wall of the side surface of the test warehouse is provided with a dehumidifier; the inner wall of the bottom surface of the equipment warehouse is provided with a water-cooled chiller and a hot air blower, the cold water pipe of the water-cooled chiller passes through the partition and extends into the cold box, and the hot air pipe of the hot air blower passes through the partition and is connected to the air distributor arranged in the hot box; the inner wall of the side surface of the equipment warehouse is fixedly provided with a first support plate and a second support plate, the first support plate is provided with a motor, and the output end of the motor is fixedly provided with a A transmission rod is arranged, the transmission rod passes through the partition and extends to the inside of the hot box, a turntable is fixedly arranged on the top of the transmission rod, and the turntable is located below the temperature and humidity sensor; a humidifier is arranged on the second support plate, and the output end of the humidifier passes through the partition and extends to the inside of the hot box; a first fan close to the cold box and a second fan close to the hot box are respectively arranged on the other pair of side surfaces of the test chamber, and the position of the first fan is lower than that of the second fan; a third fan is arranged on the inner wall of the top surface of the test chamber near one end of the first fan, and the first fan, the second fan, the third fan and the air distributor are arranged in the test chamber A circulating air duct is formed inside the chamber; one side of the test chamber is closed, and the other side corresponding thereto is a chamber door, and a second observation window is provided on the chamber door; an image acquisition device is provided on the upper part of the outer wall of the test chamber with the second observation window; a control panel is provided on the outer wall of the side of the body; the first fan, motor, water-cooled chiller, hot air blower, humidifier, dehumidifier, temperature and humidity sensor, second fan, telescopic device, third fan and image acquisition device are all connected to the control panel; when performing instrument temperature test, open the chamber door, place the instrument to be tested at the center of the turntable, close the chamber door and Start the motor, and then control the electric telescopic rod to extend the temperature and humidity sensor to about 5 cm above the instrument; then start the water-cooled chiller to cool down the test chamber, and start the first fan, the second fan and the third fan to speed up the cooling process. After the temperature in the test chamber drops to 10°C, turn off the water-cooled chiller, and start the hot air blower to heat up the test chamber. When the temperature rises to 15°C, 20°C and 30°C respectively, record the instrument temperature at this time through the camera, and compare it with the temperature data transmitted by the temperature and humidity sensor in the test chamber at this time to complete the instrument temperature test; When performing the instrument humidity test, open the box door, place the instrument to be tested at the center of the turntable, close the box door and start the motor, then control the electric telescopic rod to extend the temperature and humidity sensor to about 5 cm above the instrument; Start the dehumidifier to reduce the humidity in the test chamber to 20RH%, then start the humidifier to increase the humidity in the test chamber, and start the first fan, the second fan and the third fan at the same time to make the humidity evenly distributed. When the humidity rises to 40RH%, 60RH% and 80RH% respectively, record the instrument humidity at this time through the camera and compare it with the humidity data transmitted by the temperature and humidity sensor in the test chamber at this time to complete the instrument humidity test.

2. The instrument temperature and humidity tester according to claim 1, characterized in that: The other pair of side surfaces of the test chamber are provided with first observation windows.

3. The instrument temperature and humidity tester according to claim 1, characterized in that: The cold water pipes are distributed in an M shape.

4. The instrument temperature and humidity tester according to claim 3, characterized in that: The inner wall of the test chamber is provided with a heat preservation structure.

5. An instrument temperature and humidity tester according to claim 1 or 4, characterized in that: The second observation window is a multi-layer transparent glass, and a vacuum is provided between two adjacent layers of glass.

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