CN-122006824-A - Can improve humiture case of humiture homogeneity

Abstract

The invention discloses a temperature and humidity box capable of improving temperature and humidity uniformity, relates to the technical field of environment simulation equipment, and aims to solve the problem of poor temperature and humidity uniformity in a working space caused by unreasonable air duct structures of traditional equipment. The temperature and humidity box comprises an inner container, a power driving unit, an air duct plate and an air guide assembly. The corner of the liner is provided with an arc-shaped surface to reduce airflow vortex. The air duct plate is of a U-shaped structure and divides the interior of the inner container into an air cavity and a working cavity, wherein the upper air duct plate and the lower air duct plate are provided with uniform air outlet holes, and the middle air duct plate is provided with no holes so as to force air flow to uniformly diffuse to two sides. The power driving unit realizes wide air supply. The air guide assembly comprises a first air guide plate arranged on the return air path and a second air guide plate arranged on the air outlet path, and the air guide assembly guides air flow together to form smooth and efficient vertical circulation. By optimizing the air duct structure and the air flow structure, the uniformity, the circulation efficiency and the operation stability of a temperature field and a humidity field in the temperature and humidity box are obviously improved.

Inventors

• ZHANG JUNLIANG
• XIE WEIMIN

Assignees

• 一恒生命科学仪器(昆山)有限公司

Dates

Publication Date

20260512

Application Date

20260319

Claims (10)

1. 1. The temperature and humidity box capable of improving temperature and humidity uniformity is characterized by comprising an inner container (1), wherein the inner container (1) forms a box body structure with an opening (12); The power driving unit is arranged on the wall surface of the inner container (1); The air duct plate (3) is arranged in the inner container (1) and divides the inner space of the inner container (1) into an air cavity (11) and a working cavity (14), the working cavity (14) is used for placing a sample to be tested, the air cavity (11) surrounds at least part of the periphery of the working cavity (14), and a plurality of air outlet holes (34) used for communicating the air cavity (11) with the working cavity (14) are formed in at least one plate surface of the air duct plate (3); the air guide assembly is arranged in the air cavity (11) and used for guiding an airflow path; Wherein the power driving unit is used for driving airflow to forcedly circulate between the wind cavity (11) and the working cavity (14).
2. 2. The temperature and humidity box capable of improving temperature and humidity uniformity according to claim 1 is characterized in that the air duct plate (3) is of a U-shaped structure and comprises an upper air duct plate (31), an intermediate air duct plate (32) and a lower air duct plate (33) which are sequentially connected, the edges of the air duct plate are in sealing connection with the inner wall of the inner container (1) to jointly enclose and form the working cavity (14), and the air outlet holes (34) are uniformly formed in the surfaces of the upper air duct plate (31) and the lower air duct plate (33) facing the working cavity (14).
3. 3. The temperature and humidity box capable of improving temperature and humidity uniformity according to claim 2 is characterized in that the power driving unit comprises a driving motor (2) and a through-flow fan (22) driven by the driving motor (2), the driving motor (2) is arranged on the outer wall of the inner container (1), an output shaft of the driving motor extends into the air cavity (11), the through-flow fan (22) is transversely arranged in the air cavity (11) and is located in an area between the upper air duct plate (31) and the middle air duct plate (32), and the axial direction of the through-flow fan is parallel to the width direction of the inner container (1).
4. 4. A temperature and humidity box capable of improving temperature and humidity uniformity according to claim 3, wherein the air guide assembly comprises a first air guide plate (61), the first air guide plate (61) is provided with an arc angle and is arranged on the inner wall of the liner (1) on the side of the lower air duct plate (33) facing away from the working cavity (14), and is used for smoothly guiding air flow from the working cavity (14) to the air inlet side of the through-flow fan (22).
5. 5. The temperature and humidity box capable of improving temperature and humidity uniformity according to claim 4, wherein the air guide assembly further comprises a second air guide plate (62), the second air guide plate (62) is provided with an arc angle, is fixed on the inner wall of the inner container (1) and is located between the air outlet side of the through-flow fan (22) and the upper air duct plate (31), and the second air guide plate (62) is used for guiding air flow output by the through-flow fan (22) towards the air outlet hole (34) on the upper air duct plate (31).
6. 6. The temperature and humidity box capable of improving temperature and humidity uniformity according to claim 2 is characterized in that each corner of the inner wall of the inner container (1) is provided with an arc-shaped corner surface (13).
7. 7. The temperature and humidity box capable of improving temperature and humidity uniformity according to claim 2, further comprising a water tank (4), wherein the water tank (4) is communicated with the air cavity (11) and is used for providing a humidifying water source, and the temperature and humidity box further comprises a temperature sensor and a humidity sensor which are arranged in the working cavity (14).
8. 8. The temperature and humidity box capable of improving temperature and humidity uniformity according to claim 7, wherein a first water level sensor for detecting water level is arranged in the water box (4).
9. 9. The temperature and humidity box capable of improving temperature and humidity uniformity according to claim 3 is characterized by further comprising a water collecting tank (5), wherein the water collecting tank (5) is arranged at one end of the upper air channel plate (31) opposite to the cross flow fan (22), a plurality of air flow holes (51) are formed in the upper area of the water collecting tank (5) facing to one side wall of the cross flow fan (22), a water collecting cavity (52) for collecting condensed water is formed in the lower area, and a gap for allowing air to pass through is reserved between the top of the water collecting tank (5) and the inner wall of the inner container (1).
10. 10. A temperature and humidity tank capable of improving uniformity of temperature and humidity according to claim 9, characterized in that a second water level sensor for detecting the water level of condensed water is arranged in the water collecting tank (5).

Description

Can improve humiture case of humiture homogeneity Technical Field The application relates to the technical field of environment simulation equipment, in particular to a temperature and humidity box capable of improving temperature and humidity uniformity. Background The temperature and humidity box is an important device for simulating various temperature and humidity environments in the fields of scientific research, industry and the like, and one of the core performance indexes is temperature and humidity uniformity in a working space. The conventional temperature and humidity box air duct structure has the problems that a centrifugal fan is matched with a straight plate air duct, air flow dead angles are easily formed at four corners of a box body, air outlet of the air duct is uneven, the air quantity and air speed difference along the length direction of the air duct are large, and an air return path is unsmooth, so that overall air flow organization is disordered. These problems eventually lead to larger temperature and humidity deviations at different positions in the box, and cannot meet the high-precision test requirements. The prior art scheme is as follows: at present, the air duct structure of the common temperature and humidity box in the market mainly has the following technical schemes, and each of the technical schemes has obvious limitations: 1. The centrifugal fan is provided with a straight plate type air duct. One or more high-power centrifugal fans are adopted and are arranged at the rear part or the top part of the box body, and the air outlet is usually a strip slit or is simply provided with a plurality of groups of large ventilation openings 2. The axial flow fan is added with a simple air duct. Axial fans are used in low cost or less demanding equipment, usually mounted directly on the top or rear of the working chamber, with simple deflectors trying to dissipate the wind There are disadvantages: 1. the centrifugal fan has the defects that wind force is concentrated, the wind outlet direction is perpendicular to the working chamber, the whole working chamber range can be covered through multiple turning, vortex and dead angles are easy to form in the box, fluid resistance in the air duct is uneven, the wind quantity and wind speed along the length of the air duct are seriously attenuated, the wind quantity near one end of the fan is large, the wind quantity is small when the wind quantity is far away from one end of the fan, and the temperature and humidity deviation on the left side and the right side of the working chamber is large. In addition, in order to achieve the required wind pressure, the device generally needs a higher rotating speed and has the characteristics of high noise and high energy consumption. 2. The axial flow fan has the defects that the wind pressure is low, the resistance caused by the components such as a heater humidifier evaporator and the like is difficult to overcome, the air supply distance is short, the air flow cannot effectively reach each corner of the working chamber, the air flow direction is single, and the uniformity is difficult to ensure. The air flow is similar to columnar wind, and is directly blown to one direction, and no effective flow equalizing measure is adopted, so that the temperature and humidity uniformity in the working chamber is poor. Disclosure of Invention In order to solve the problems, the application provides a temperature and humidity box capable of improving temperature and humidity uniformity. A temperature and humidity box capable of improving temperature and humidity uniformity comprises an inner container, a power driving unit, an air duct plate and an air guide assembly. The inner container is of a box structure with an opening, the power driving unit is arranged on the wall surface of the inner container, the air duct plate is arranged inside the inner container and divides the inner container into an air cavity and a working cavity, the working cavity is used for placing a sample to be tested, the air cavity surrounds at least one part of the periphery of the working cavity, a plurality of air outlet holes used for connecting the air cavity and the working cavity are formed in the air duct plate, the air guide assembly is arranged in the air cavity and used for guiding an air flow path, and the power driving unit is used for driving air flow to forcedly circulate between the air cavity and the working cavity. Compared with the prior art, by adopting the technical scheme, the independent air cavity and the working cavity are arranged in the liner, and the power driving unit is utilized to force air flow to circulate between the air cavity and the working cavity, so that the air flow circulation system with clear organization and controllable path is constructed, and a foundation is provided for realizing temperature and humidity uniformity from the whole structure. Further, the air duct plate is of a U-shaped stru