Droplet icing experiment box with humidity and temperature dual regulation and control functions
By adopting a double-layer structure and airflow regulation technology in the experimental box, the problem of airflow instability caused by the single-layer design is solved, uniform droplets fall and accurate icing are achieved, and the reliability of the experimental results is improved.
Patent Information
- Application Number
- CN202420781983.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-16
AI Technical Summary
The existing experimental box is designed as a single layer, which leads to instability of the airflow, affects the uniformity of the droplet droplet falling process and icing forming, resulting in inaccurate experimental results.
A droplet freezing experiment box with dual humidity and temperature regulation was designed. It adopts a double-layer structure, stabilizes the airflow through the outer and inner boxes, and uses pure nitrogen and saturated water vapor nitrogen to control the humidity, and adjust it with semiconductor refrigeration sheet. Temperature ensures stability of airflow and ambient conditions.
The stability of the airflow, linear motion and accurate icing of the droplets when they fall, meet the experimental requirements and improve the reliability and accuracy of the experimental results.
Smart Images
Figure CN222152075U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of experimental boxes, in particular to a droplet freezing experimental box with dual regulation of humidity and temperature. Background Art
[0002] An experimental box is needed to study the effect of humidity on the freezing process of droplets. The existing experimental box adopts a single-layer design. When the air flow directly enters the experimental box, it will cause the internal air flow to be unstable, resulting in the shaking of the droplets during the falling process and the deviation of the ice tip, thus affecting the experimental process. Utility Model Content
[0003] The purpose of the utility model is to provide a droplet freezing experiment box with dual control of humidity and temperature, so as to solve the problems raised in the above background technology.
[0004] To achieve the above object, the utility model provides the following technical solutions: a droplet freezing experiment box with dual control of humidity and temperature, comprising an outer box, a liquid inlet, a first air inlet and a second air inlet are opened at the upper end of the outer box, and a hygrometer and a thermometer are arranged on the outer wall of the outer box;
[0005] An inner box is arranged inside the outer box, a semiconductor refrigeration sheet is fixed on the inner wall of the inner box, and the thermometer is connected to the semiconductor refrigeration sheet through a wire to monitor the temperature of the semiconductor refrigeration sheet;
[0006] The upper end of the inner box is connected to a liquid inlet pipe, the liquid inlet pipe extends upward and is connected to the liquid inlet, and the semiconductor cooling plate extends inward to below the liquid inlet pipe;
[0007] The semiconductor refrigeration sheet is provided with a glass slide for freezing the liquid droplets;
[0008] The upper end of the inner box is also provided with an inner hole for air convection;
[0009] The hygrometer is used to detect the humidity in the outer box.
[0010] Furthermore, the outer box has a left side window and a right side window on its left and right sides, and the inner box has a left side window and a right side window on its left and right sides, the outer box left side window and the inner box left side window are arranged correspondingly, and the outer box right side window and the inner box right side window are arranged correspondingly.
[0011] Furthermore, a door frame is provided on the front of the outer box, a door cover is hinged on the door frame, a protrusion is provided on the door cover, and the protrusion is tightly covered with the door frame.
[0012] Furthermore, an opening is provided on the inner box facing the door cover.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] (1) By setting up a double-layer box body, the airflow is stabilized in the outer box before entering the inner box. At this time, the airflow in the inner box is stable, and the droplets move in a straight line when falling and accurately fall on the glass slide to freeze.
[0015] (2) By simultaneously filling the outer box with saturated water vapor nitrogen and pure nitrogen, since pure nitrogen is relatively dry, the humidity of the freezing environment is controlled by controlling the mass ratio of the pure nitrogen flow and the saturated water vapor nitrogen flow to meet the experimental requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a structural diagram of the outer box of the utility model;
[0017] Figure 2 This is a structural diagram of the inner box of the utility model;
[0018] Figure 3 This is a connection diagram of the semiconductor cooling sheet and the thermometer of the utility model.
[0019] In the figure: 1. outer box; 11. liquid inlet; 12. first air inlet; 13. second air inlet; 14. door frame; 15. door cover; 151. protrusion; 2. inner box; 21. opening; 31. right window of outer box; 32. right window of inner box; 41. left window of outer box; 42. left window of inner box; 5. inner hole; 6. liquid inlet pipe; 7. hygrometer; 8. thermometer; 9. semiconductor cooling chip; 91. glass slide. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] See also Figure 1-3 A droplet freezing experiment box with dual control of humidity and temperature includes an outer box 1, a liquid inlet 11, a first air inlet 12 and a second air inlet 13 are opened at the upper end of the outer box 1, a hygrometer 7 and a thermometer 8 are arranged on the outer wall of the outer box 1, and the humidity and temperature in the inner box 2 are monitored by a sensor and transmitted to the hygrometer 7 for real-time display.
[0022] An inner box 2 is provided inside the outer box 1, and a semiconductor refrigeration sheet 9 is fixed inside the inner box 2. Preferably, the semiconductor refrigeration sheet 9 is fixed at the bottom center of the inner box 2, and a glass slide 91 for freezing droplets is provided on the semiconductor refrigeration sheet 9;
[0023] The surface temperature of the semiconductor cooling sheet 9 is monitored by a thermocouple and connected to the thermometer 8 through a wire. The thermometer 8 can provide real-time feedback on the temperature of the semiconductor cooling sheet 9. The temperature control range of the upper surface of the semiconductor cooling sheet 9 is -40 to 25°C.
[0024] The upper end of the inner box 2 is connected with an inner hole 5 and a liquid inlet pipe 6. The inner hole 5 is used for air convection between the outer box 1 and the inner box 2. The liquid inlet pipe 6 extends upward and is connected with the liquid inlet 11. The semiconductor refrigeration plate 9 is located below the liquid inlet pipe 6.
[0025] In this embodiment, an outer box left side window 41 and an outer box right side window 31 are respectively opened on the left and right sides of the outer box 1, and an inner box left side window 42 and an inner box right side window 32 are respectively opened on the left and right sides of the inner box 2. The outer box left side window 41 and the inner box left side window 42 are arranged correspondingly, and the outer box right side window 31 and the inner box right side window 32 are arranged correspondingly. The outer box left side window 41, the outer box right side window 31, the inner box left side window 42 and the inner box right side window 32 are used to observe the freezing condition of droplets in the inner box 2.
[0026] In this embodiment, a door frame 14 is further provided on the front of the outer box 1 , a door cover 15 is hinged on the door frame 14 , and a protrusion 151 is provided on the door cover 15 , and the protrusion 151 is tightly covered with the door frame 14 .
[0027] In this embodiment, an opening 21 is provided on the inner box 2 opposite to the door cover 15. The opening 21 can be set as an open and close structure for inner box inspection or manual operation.
[0028] Working principle: During the experiment, pure liquid nitrogen and saturated water vapor nitrogen are respectively introduced into the first air inlet 12 and the second air inlet 13, and the pure liquid nitrogen and saturated water vapor nitrogen in the outer box 1 escape into the inner box 2 through the inner hole 5. The pure liquid nitrogen and saturated water vapor nitrogen have stabilized when entering the inner box 2. The humidity of the freezing environment is controlled by controlling the mass ratio of the pure nitrogen flow and the saturated water vapor nitrogen flow. The temperature of the glass slide 91 is controlled in real time by adjusting the voltage of the semiconductor refrigeration plate 9. When the ambient humidity and surface temperature meet the experimental requirements, liquid droplets are injected into the inner box 2 through the liquid inlet 11, and the liquid droplets fall along the liquid inlet pipe 6 onto the glass slide 91 located on the semiconductor refrigeration plate 9, hit the glass slide 91 and begin to freeze.
[0029] During this process, a high-definition CCD camera is used to record the freezing process and time under this humidity through the left window 41 of the outer box and the left window 42 of the inner box, and an infrared thermal imager is used to record the freezing process and time under this humidity through the right window 31 of the outer box and the right window 32 of the inner box.
[0030] In order to ensure the sealing, the present application uses a single crystal germanium (SCG) lens in the shooting light path of the infrared thermal imager (ie, the right window 31 of the outer box and the right window 32 of the inner box), and the infrared transmittance of the lens in the wavelength range of 9 to 12 μm is about 95%.
[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A droplet freezing experiment box with dual humidity and temperature control, comprising an outer box (1), wherein the upper end of the outer box (1) is provided with a liquid inlet (11), a first air inlet (12) and a second air inlet (13), and the outer wall of the outer box (1) is provided with a hygrometer (7) and a thermometer (8), characterized in that: An inner box (2) is arranged inside the outer box (1), a semiconductor cooling sheet (9) is fixed inside the inner box (2), and the thermometer (8) is connected to the semiconductor cooling sheet (9) via a wire and is used to monitor the surface temperature of the semiconductor cooling sheet (9); The upper end of the inner box (2) is connected to a liquid inlet pipe (6), the liquid inlet pipe (6) extends upward and is connected to a liquid inlet port (11), and the semiconductor cooling plate (9) extends inward to below the liquid inlet pipe (6); The semiconductor refrigeration sheet (9) is provided with a glass sheet (91) for freezing the liquid droplets; The upper end of the inner box (2) is also provided with an inner hole (5) for air convection; The hygrometer (7) is used to detect the humidity and temperature inside the outer box (1).
2. The droplet freezing experiment box with dual control of humidity and temperature according to claim 1 is characterized by: The outer box (1) is provided with an outer box left side window (41) and an outer box right side window (31) on the left and right sides respectively, and the inner box (2) is provided with an inner box left side window (42) and an inner box right side window (32) on the left and right sides respectively. The outer box left side window (41) and the inner box left side window (42) are arranged correspondingly, and the outer box right side window (31) and the inner box right side window (32) are arranged correspondingly.
3. The droplet freezing experiment box with dual control of humidity and temperature according to claim 2 is characterized by: The front of the outer box (1) is also provided with a door frame (14), the door frame (14) is hinged with a door cover (15), the door cover (15) is provided with a protrusion (151), and the protrusion (151) is tightly covered with the door frame (14).
4. The droplet freezing experiment box with dual control of humidity and temperature according to claim 3 is characterized by: An opening (21) is provided on the inner box (2) directly opposite to the door cover (15).