Standard temperature and humidity calibration device
By employing a combination of a horizontal plate, a diffuser plate, and a circulating air pump in the standard temperature and humidity calibration device, the problem of uneven temperature and humidity distribution was solved, thus achieving uniformity of temperature and humidity within the calibration chamber and accuracy of the calibration results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-30
- Publication Date
- 2026-04-03
AI Technical Summary
Existing standard temperature and humidity calibration devices suffer from inconsistent internal temperature and humidity distribution in practical applications, leading to deviations in calibration results.
A standard temperature and humidity calibration device was designed, which adopts a combination structure of a horizontal plate, a diffuser plate and a circulating air pump. The uniformity of temperature and humidity distribution is ensured by circulating gas in the upper and lower spaces inside the calibration chamber. Through holes are set on the horizontal plate to promote gas flow. At the same time, temperature and humidity sensors and controllers are used to adjust the temperature and humidity in real time.
This achieves uniform temperature and humidity distribution within the calibration chamber, avoiding the problem of uneven gas temperature and humidity, and improving the accuracy of calibration results.
Smart Images
Figure CN224081983U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of calibration equipment technology, specifically a standard temperature and humidity calibration device. Background Technology
[0002] Environmental temperature and humidity measuring instruments are essential experimental equipment in scientific research and production. According to equipment management requirements, these instruments need to be calibrated regularly using metrological calibration devices to ensure their operational status. In the calibration process, the standard temperature and humidity calibration device is a key piece of equipment. However, existing standard temperature and humidity calibration devices suffer from inconsistent internal temperature and humidity distribution in practical applications, leading to deviations in calibration results. Therefore, it is necessary to design a standard temperature and humidity calibration device with high internal temperature and humidity uniformity. Utility Model Content
[0003] The purpose of this invention is to provide a standard temperature and humidity calibration device with high internal temperature and humidity uniformity, so as to solve the technical problem that existing standard temperature and humidity calibration devices have inconsistent internal temperature and humidity distribution in practical applications, which leads to deviations in calibration results.
[0004] To solve the above technical problems, the technical solution of this utility model is as follows: a standard temperature and humidity calibration device, including a calibration box, a sealed door hinged to one side of the calibration box, and a working box fixedly connected to the other side. A temperature and humidity regulating mechanism and a circulating air pump are fixedly connected inside the working box. A horizontal plate is fixedly connected inside the calibration box, and several through holes are opened on the horizontal plate. A vent plate is fixedly connected to one side of the inner wall of the calibration box, and an air outlet is opened on the opposite side. There are two vent plates and two air outlets, respectively located on the upper and lower sides of the horizontal plate. A circulating air inlet pipe is fixedly connected to the input end of each vent plate, and a circulating air outlet pipe is fixedly connected to the outer side of each air outlet. The output end of the circulating air outlet pipe is fixedly connected to the circulating air pump, and the input end of the circulating air inlet pipe is fixedly connected to the temperature and humidity regulating mechanism. A temperature and humidity sensor is fixedly connected to the side wall of the calibration box, and a controller is fixedly connected to the outer side of the calibration box. The temperature and humidity sensor is communicatively connected to the controller, and the temperature and humidity regulating mechanism and the circulating air pump are both controlled by the controller.
[0005] Furthermore, the temperature and humidity regulating mechanism includes an air heater and an electric humidifier. The input ends of the air heater and the electric humidifier are both fixedly connected to the output end of the circulating air pump through pipes. A heating solenoid valve is installed between the air heater and the circulating air pump, and a humidifying solenoid valve is installed between the electric humidifier and the circulating air pump. The output ends of the air heater and the electric humidifier are both fixedly connected to the input end of the circulating air inlet pipe through pipes. The air heater, the electric humidifier, the heating solenoid valve, and the humidifying solenoid valve are all controlled by a controller.
[0006] Furthermore, a plurality of clamping mechanisms are fixedly connected to the upper end of the horizontal plate. The clamping mechanism includes a fixed seat, a mounting seat, a limiting plate, a pressure plate, and a threaded rod. The mounting seat and the limiting plate are both fixedly connected to the upper end of the fixed seat. The lower end of the fixed seat is fixedly connected to the upper end of the horizontal plate. The mounting seat has a threaded hole. The threaded rod passes through the threaded hole and is threadedly connected to the mounting seat. One end of the threaded rod near the limiting plate is rotatably connected to the pressure plate, and the other end is fixedly connected to a knob.
[0007] Furthermore, rubber pads are fixedly connected to the opposite sides of the limiting plate and the pressure plate.
[0008] Furthermore, a transparent observation window is provided on the sealed box door.
[0009] Furthermore, ventilation holes are provided on the side wall of the work box.
[0010] This utility model has the following advantages compared with the prior art:
[0011] 1. This utility model features a horizontal plate, two sets of venting plates and air outlets, and a circulating air pump. The horizontal plate divides the calibration chamber into upper and lower sections, each equipped with a venting plate and an air outlet. The venting plates and air outlets are connected to the circulating air pump. When the circulating air pump is working, it continuously circulates the gas between the upper and lower spaces inside the calibration chamber, ensuring the uniformity of temperature and humidity distribution within the chamber. Additionally, several through holes are provided on the horizontal plate to further promote gas flow between the upper and lower sections, preventing uneven temperature and humidity distribution within the chamber.
[0012] 2. This utility model uses several clamping mechanisms fixedly connected to a horizontal plate to clamp small-volume objects in the measuring instrument to be calibrated, which facilitates fixed support and prevents these objects from tipping over or moving due to airflow. It also facilitates the observation of readings at the end of the calibration. Attached Figure Description
[0013] Figure 1 This is a front view schematic diagram of the internal structure of this utility model.
[0014] Figure 2 This is a top view of the internal structure of this utility model.
[0015] Figure 3 This is a schematic diagram of the clamping mechanism of this utility model.
[0016] Figure 4 This is the front view of the present invention.
[0017] Figure 5 This is a rear view of the present invention.
[0018] Figure 6 This is a right-side view of the present invention.
[0019] In the diagram: 1. Calibration box, 2. Sealed door, 3. Working box, 4. Circulating air pump, 5. Level plate, 6. Ventilation plate, 7. Air outlet, 8. Circulating air inlet pipe, 9. Circulating air outlet pipe, 10. Temperature and humidity sensor, 11. Air heater, 12. Electric humidifier, 13. Heating solenoid valve, 14. Humidifying solenoid valve, 15. Fixing base, 16. Mounting base, 17. Limiting plate, 18. Pressure plate, 19. Threaded rod, 20. Knob, 21. Rubber pad, 22. Transparent observation window, 23. Ventilation hole. Detailed Implementation
[0020] The present invention will be further described below with reference to the accompanying drawings.
[0021] like Figures 1 to 6The standard temperature and humidity calibration device shown includes a calibration chamber 1, a sealed door 2 hinged to the front of the calibration chamber 1, and a working chamber 3 fixedly connected to the rear. The sealed door 2 has a handle and lock on one side. A temperature and humidity regulating mechanism and a circulating air pump 4 are fixedly connected inside the working chamber 3. The temperature and humidity regulating mechanism is used to regulate the temperature and humidity inside the calibration chamber 1. The circulating air pump 4 circulates the gas inside the calibration chamber 1 when it is working. A horizontal plate 5 is fixedly connected inside the calibration chamber 1, dividing the calibration chamber 1 into upper and lower layers. Several through holes are opened on the horizontal plate 5, allowing airflow exchange between the upper and lower sides of the horizontal plate 5. A diffuser plate 6 is fixedly connected to one side of the inner wall of the calibration chamber 1, and an air outlet 7 is opened on the opposite side. The diffuser plate 6 and the air outlet 7... Two air diffuser plates 6 are provided, located on the upper and lower sides of the horizontal plate 5 respectively. The diffuser plates 6 are hollow plates with an outlet on one side. Airflow enters from one side of the diffuser plate 6 and exits through the outlet on the other side, dispersing a single airflow into multiple airflows. A circulating air inlet pipe 8 is fixedly connected to the input end of each diffuser plate 6, and a circulating air outlet pipe 9 is fixedly connected to the outside of each outlet 7. The output end of the circulating air outlet pipe 9 is fixedly connected to the circulating air pump 4, and the input end of the circulating air inlet pipe 8 is fixedly connected to the temperature and humidity control mechanism. A temperature and humidity sensor 10 is fixedly connected to the side wall of the calibration chamber 1, and a controller is fixedly connected to the outside of the calibration chamber 1. The temperature and humidity control mechanism and the circulating air pump 4 are both controlled by the controller, and the temperature and humidity sensor 10 communicates with the controller. The temperature and humidity sensor 10 monitors the temperature and humidity inside the calibration chamber 1 in real time and transmits the result signal to the controller. The controller controls the temperature and humidity control structure according to the set temperature and humidity parameters, adjusting the temperature of the calibration chamber 1 to the set temperature and humidity parameter values of the controller.
[0022] To increase the temperature and humidity inside the test chamber 1, the temperature and humidity control mechanism includes an air heater 11 and an electric humidifier 12. The input ends of the air heater 11 and the electric humidifier 12 are fixedly connected to the output end of the circulating air pump 4 through pipes. A heating solenoid valve 13 is installed between the air heater 11 and the circulating air pump 4, and a humidifying solenoid valve 14 is installed between the electric humidifier 12 and the circulating air pump 4. The output ends of the air heater 11 and the electric humidifier 12 are fixedly connected to the input end of the circulating air inlet pipe 8 through pipes. The air heater 11, the electric humidifier 12, the heating solenoid valve 13, and the humidifying solenoid valve 14 are all controlled by a controller.
[0023] When the gas in the calibration chamber 1 needs to be humidified, the controller controls the electric humidifier 12 to start working, and simultaneously controls the heating solenoid valve 13 to close and the humidification solenoid valve 14 to open. After the gas is humidified, the controller controls the electric humidifier 12 to close, and simultaneously controls the heating solenoid valve 13 to open and the humidification solenoid valve 14 to close. When the gas in the calibration chamber 1 needs to be heated, the controller controls the air heater 11 to start working, and simultaneously controls the heating solenoid valve 13 to open and the humidification solenoid valve 14 to close. After the gas is heated, the controller controls the air heater 11 to close.
[0024] In this embodiment, the temperature and humidity sensor 10 is model AM2301, used to detect the temperature and humidity values inside the calibration chamber 1; the controller is model DVP-32ES200T, used to control the circulating air pump 4 and the temperature and humidity adjustment mechanism; the air heater 11 is a spiral finned heater, used to heat the gas inside the calibration chamber 1; and the electric humidifier 12 is used to humidify the gas inside the calibration chamber 1.
[0025] To stably fix small-sized items to be inspected, several clamping mechanisms 15 are fixedly connected to the upper end of the horizontal plate 5. The clamping mechanism 15 includes a fixed seat 151, a mounting seat 152, a limiting plate 153, a pressure plate 154, and a threaded rod 155. The mounting seat 152 and the limiting plate 153 are both fixedly connected to the upper end of the fixed seat 151. The lower end of the fixed seat 151 is fixedly connected to the upper end of the horizontal plate 5. The mounting seat 152 has a threaded hole. The threaded rod 155 passes through the threaded hole and is threadedly connected to the mounting seat 152. One end of the threaded rod 155 near the limiting plate 153 is rotatably connected to the pressure plate 154, and the other end is fixedly connected to a knob 16.
[0026] To prevent the clamping mechanism from bumping and damaging the items to be inspected when fixing them, rubber pads 17 are fixedly connected to the opposite sides of the limiting plate 153 and the pressure plate 154.
[0027] When it is necessary to clamp an item, place the item between the limiting plate 153 and the pressure plate 154, and then turn the knob 16 to drive the threaded rod 155 to rotate, so that the pressure plate 154 moves continuously toward the limiting plate 153. The distance between the limiting plate 153 and the pressure plate 154 decreases continuously until the rubber pads 17 on the sides of both contact the item to be clamped and clamp and fix the item.
[0028] To facilitate observation of the real-time situation inside the calibration chamber 1, a transparent observation window 18 is provided on the sealed chamber door 2.
[0029] To facilitate heat dissipation of the equipment inside the work box 3, ventilation holes 19 are provided on the side wall of the work box 3.
[0030] The specific working process of this utility model is as follows:
[0031] The operator opens the sealed chamber door and places the measuring instrument to be calibrated into calibration chamber 1. Smaller measuring instruments are secured to the clamping mechanism 15 to prevent them from tipping over or moving due to airflow. After placement, the sealed chamber door 2 is closed and locked. Temperature and humidity parameters that match the measuring instrument to be calibrated and are higher than the ambient temperature and humidity in the working chamber are set in the controller. The operator then starts the circulating air pump 4. While the circulating air pump 4 is working, it continuously draws gas from calibration chamber 1 through the outlet 7 and the circulating air pipe 9, then sends it to the temperature and humidity control mechanism for temperature and humidity adjustment. The temperature and humidity regulated gas is then passed through... The circulating air intake pipe 8 is fed into the diffuser plate 6. After being dispersed by the diffuser plate 6, the air enters the calibration chamber 1. The temperature and humidity sensor monitors the temperature inside the calibration chamber 1 in real time and transmits the result signal to the controller. When the temperature or humidity inside the calibration chamber 1 reaches the set parameters of the controller, the controller controls the temperature and humidity adjustment mechanism to stop working, while the circulating air pump 4 continues to work to ensure that the temperature and humidity inside the calibration chamber 1 are uniformly distributed. After maintaining this for a period of time, the temperature and humidity readings of the measuring instrument to be calibrated are observed and recorded through the transparent observation window 18 to complete the calibration. Then, the sealed chamber door 2 is opened, and after the calibration chamber 1 has cooled down, the measuring instrument inside is taken out.
Claims
1. A standard temperature and humidity calibration device, comprising a calibration chamber (1), wherein a sealed door (2) is hinged to one side of the calibration chamber (1) and a working chamber (3) is fixedly connected to the other side, wherein a temperature and humidity regulating mechanism and a circulating air pump (4) are fixedly connected inside the working chamber (3), characterized in that: The calibration chamber (1) is fixedly connected to a horizontal plate (5), which has several through holes. A ventilation plate (6) is fixedly connected to one side of the inner wall of the calibration chamber (1), and an air outlet (7) is opened on the opposite side. There are two ventilation plates (6) and two air outlets (7), which are located on the upper and lower sides of the horizontal plate (5) respectively. A circulating air inlet pipe (8) is fixedly connected to the input end of the ventilation plate (6), and a circulating air outlet pipe (9) is fixedly connected to the outside of the air outlet (7). The output end of the circulating air outlet pipe (9) is fixedly connected to the circulating air pump (4), and the input end of the circulating air inlet pipe (8) is fixedly connected to the temperature and humidity control mechanism. A temperature and humidity sensor (10) is fixedly connected to the side wall of the calibration chamber (1), and a controller is fixedly connected to the outside of the calibration chamber (1). The temperature and humidity sensor (10) is communicatively connected to the controller. The temperature and humidity control mechanism and the circulating air pump (4) are both controlled by the controller.
2. The standard temperature and humidity calibration device according to claim 1, characterized in that: The temperature and humidity regulating mechanism includes an air heater (11) and an electric humidifier (12). The input ends of the air heater (11) and the electric humidifier (12) are fixedly connected to the output end of the circulating air pump (4) through pipes. A heating solenoid valve (13) is installed between the air heater (11) and the circulating air pump (4). A humidifying solenoid valve (14) is installed between the electric humidifier (12) and the circulating air pump (4). The output ends of the air heater (11) and the electric humidifier (12) are fixedly connected to the input end of the circulating air inlet pipe (8) through pipes. The air heater (11), the electric humidifier (12), the heating solenoid valve (13), and the humidifying solenoid valve (14) are all controlled by a controller.
3. The standard temperature and humidity calibration device according to claim 1, characterized in that: The upper end of the horizontal plate (5) is fixedly connected to several clamping mechanisms (15). The clamping mechanism (15) includes a fixed seat (151), a mounting seat (152), a limiting plate (153), a pressure plate (154), and a threaded rod (155). The mounting seat (152) and the limiting plate (153) are both fixedly connected to the upper end of the fixed seat (151). The lower end of the fixed seat (151) is fixedly connected to the upper end of the horizontal plate (5). The mounting seat (152) has a threaded hole. The threaded rod (155) passes through the threaded hole and is threadedly connected to the mounting seat (152). The end of the threaded rod (155) near the limiting plate (153) is rotatably connected to the pressure plate (154), and the other end is fixedly connected to a knob (16).
4. The standard temperature and humidity calibration device according to claim 3, characterized in that: Rubber pads (17) are fixedly connected to the opposite sides of the limiting plate (153) and the pressure plate (154).
5. The standard temperature and humidity calibration device according to claim 1, characterized in that: A transparent observation window (18) is provided on the sealed box door (2).
6. The standard temperature and humidity calibration device according to claim 1, characterized in that: Ventilation holes (19) are provided on the side wall of the work box (3).