Temperature field balanced circulation diversion air duct applied to temperature control experiment environment

Abstract

The invention discloses a temperature field balanced circulation diversion air duct applied to a temperature control experiment environment, and relates to the field of temperature control experiment equipment, and the circulation diversion air duct is configured in a cavity of an incubator, a test box and the experiment box in the temperature control experiment environment, and is used for realizing uniform distribution and circulation distribution of a temperature field in the cavity. The circulating flow guide air duct comprises an air duct body, circulating fan blades, a baffle structure and a temperature control execution unit, the air duct body is arranged in a rectangular frame mode, an air inlet cavity and an air mixing cavity are formed in the front side wall area and the rear side wall area of the air duct body respectively, an air inlet net opening is formed in the lower end of the front side of the air inlet cavity, and an air outlet net opening is formed in the upper end of the front side of the air mixing cavity. According to the circulating flow guide air duct, through the collaborative design of the circulating fan blades, the Z-shaped baffle structure and the temperature control execution unit, an air flow organization system integrating temperature adjusting, mixing, homogenizing and circulating is constructed, and accurate control and efficient and uniform distribution of a temperature field in a cavity are achieved.

Description

Technical Field

[0001] This invention belongs to the field of temperature-controlled experimental equipment, specifically a temperature field equalization circulation air duct applied to temperature-controlled experimental environments. Background Technology

[0002] In modern scientific research and industrial production, precise temperature and humidity control has a decisive impact on the reliability of experimental results and the stability of product quality. Temperature-controlled experimental environments, such as biological incubators, materials testing chambers, and industrial precision testing chambers, are widely used in fields such as bioscience, materials engineering, pharmaceutical research and development, and electronic device manufacturing. These applications place extremely high demands on the uniformity and stability of the temperature field inside the experimental chamber. Any minute temperature fluctuations or uneven distribution can lead to deviations in experimental data, inconsistencies in material properties, or a decrease in product yield.

[0003] Traditional temperature-controlled experimental equipment typically employs a simple air duct design, using forced convection or natural convection via fans to circulate air within the chamber. However, such designs often suffer from significant temperature unevenness, particularly at the chamber's edges, corners, or areas far from the air duct outlet, where noticeable temperature gradients can easily appear. This non-uniform temperature field not only affects the repeatability and reliability of experimental results but also limits the equipment's effectiveness in high-end scientific research and precision manufacturing.

[0004] To address the problem of non-uniform temperature fields in temperature-controlled experimental equipment, the following technical solutions have been proposed:

[0005] 1) CN108587908A discloses a laboratory incubator with uniform gas distribution and high-efficiency filtration. In this patent application, the incubator includes an inner liner, an inner door movably connected to the front side of the inner liner, a sample storage space inside the inner liner, a water storage tray fixed to the bottom of the inner liner, an airflow guide plate fixed to the top of the water storage tray, a guide hood fixed to the rear end of the airflow guide plate near the rear inner wall of the inner liner, a high-efficiency filter fixed inside the guide hood, a first through hole on the rear inner wall of the inner liner facing the high-efficiency filter, a second through hole on the top of the inner liner, an air duct on the outer wall of the inner liner, one end of the air duct communicating with the first through hole and the other end communicating with the second through hole, a fan installed at the top of the inner liner, the output shaft of the fan passing through the air duct and the second through hole, and a fan blade installed at the end of the output shaft, the fan blade being placed inside the inner liner to ensure the utilization rate of the internal space of the incubator.

[0006] 2) CN211847926U discloses a carbon dioxide incubator air circulation structure. In this patent application, it includes a working chamber body, a working cavity is provided inside the working chamber body, and an opening for taking out and putting in is provided at the front end of the working chamber body; it also includes a circulating fan, a water storage tank is connected to the bottom end of the working chamber body, and a water tank cover is provided at the top of the water storage tank. Air inlets are evenly provided on the water tank cover, and an air guide box is provided on the rear side of the top of the water tank cover. A vertical back air duct is provided on the rear side wall of the working cavity, and a front-to-back top air duct is provided on the inner top wall of the working cavity. Air outlets are provided at the front end and on the left and right sides of the top air duct. A HEPA air purification filter is installed at the input end of the circulating fan.

[0007] While the aforementioned existing technologies have improved the uniformity of temperature distribution inside the cavity to some extent through different duct structures and airflow organization methods, the following problems still exist:

[0008] First, existing technologies mostly employ single-direction or fixed-path airflow organization, making it difficult to achieve effective temperature mixing throughout the entire cavity. This is especially true for experimental cavities with complex geometries, where temperature gradients at edges and corners remain unresolved. Second, existing technologies lack a collaborative design for active temperature regulation and homogenization of airflow. Insufficient matching between temperature control units (such as heaters or coolers) and the airflow guiding structure results in inadequate homogenization of the heated or cooled airflow before it reaches the experimental area, leading to localized temperature anomalies. Finally, the layout and aperture design of the air inlets and outlets in existing duct systems are largely based on empirical settings, failing to fully consider the balance between airflow exchange efficiency and uniform air delivery, thus affecting the accuracy and response speed of overall temperature field control. Summary of the Invention

[0009] The purpose of this invention is to provide a temperature field equalization circulation air duct for use in temperature-controlled experimental environments, so as to solve the problems of low airflow circulation efficiency and poor temperature field uniformity in the prior art.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a temperature field equalization circulating air duct for use in temperature-controlled experimental environments. The circulating air duct is configured inside the cavity of an incubator, test chamber, or experimental chamber in a temperature-controlled experimental environment, and is used to achieve uniform distribution and circulating distribution of the temperature field inside the cavity. The circulating air duct includes a duct body, circulating fan blades, a baffle structure, and a temperature control execution unit. The duct body is arranged in a rectangular frame. The front and rear sidewalls of the duct body are respectively provided with an air inlet chamber and a mixing chamber. The mixing chamber is adjacent to the air inlet chamber. The temperature control execution unit and the baffle structure are arranged sequentially along the airflow path inside the air inlet chamber. A cover plate is fixed to the front of the air inlet chamber and the mixing chamber. An air outlet communicating with the mixing chamber is opened at the upper front end of the cover plate, and an air inlet communicating with the air inlet chamber is opened at the lower front end of the cover plate.

[0011] Preferably, the temperature control actuator is used to actively control the airflow entering the air inlet chamber. The temperature control actuator includes a resistance wire heater and a finned condenser. The temperature control actuator can flexibly switch or work in concert according to experimental needs to achieve precise temperature regulation of the airflow entering the mixing chamber, covering both heating and cooling scenarios. This ensures that the internal temperature of the chamber is accurately and stably maintained within the target range, meeting the stringent requirements of diverse temperature control experiments for the direction and accuracy of temperature regulation.

[0012] Preferably, one or more circular through holes are provided in the middle of the baffle structure.

[0013] Preferably, the bottom end of the baffle structure extends downward to form a fixed edge, which is fastened to the bottom side wall of the air inlet chamber by screws.

[0014] Preferably, the baffle structure and the two side walls of the air inlet chamber form a tortuous windproof channel.

[0015] Preferably, the circulating fan blades are installed on the motor on the rear side wall of the mixing chamber and located in the circular through hole of the baffle structure. When the circulating fan blades rotate, the driving airflow is drawn into the air inlet chamber from the air inlet. After being adjusted by the temperature control execution unit and homogenized by the baffle structure, the returning air to be regulated is sent to the test area of ​​the chamber from the air outlet, forming a closed-loop circulating airflow.

[0016] Preferably, both the air inlet and outlet have a row of oblong holes. The smaller aperture of the air inlet improves airflow intake efficiency, while the smaller aperture of the outlet enhances airflow uniformity.

[0017] Compared with existing technologies, this invention has the following advantages: Through the synergistic design of circulating fan blades, a Z-shaped baffle structure, and a temperature control execution unit, this invention constructs an integrated airflow organization system that combines temperature regulation, mixing, homogenization, and circulation. This achieves precise control and efficient, uniform distribution of the internal temperature field, meeting the stringent requirements of high-end scientific research and precision manufacturing for experimental conditions. Specific technical effects include the following:

[0018] 1. By combining the baffle structure with the main body of the air duct to form a tortuous windproof channel, and with the airflow driven by the circulating fan blades, the airflow is forced to flow back and forth multiple times, so that the hot and cold air are fully mixed in the mixing chamber. The temperature uniformity inside the chamber is improved by more than 50% compared with the conventional design, and the temperature gradient problem in the edge and corner areas of the chamber in the traditional design is completely eliminated.

[0019] 2. By functionally matching the temperature control actuators such as resistance wire heaters and finned condensers with the Z-shaped baffle structure, the active adjustment and full homogenization of airflow temperature are organically unified. This ensures that the heated or cooled airflow completes the homogenization process before reaching the experimental area, solving the problem of local temperature anomalies caused by the disconnect between temperature control and air supply in traditional technologies. This meets the stringent temperature control requirements of high-precision experiments such as insect, small animal, cell culture, drug testing, material synthesis, and aging rate of electronic components.

[0020] 3. The airflow inside the cavity is directly driven by the circulating fan blades to enter the mixing chamber from the air inlet for temperature adjustment, and then directed out through the air outlet to form a highly efficient closed-loop circulating airflow system. Compared with the traditional unidirectional airflow organization method, the circulation efficiency is greatly improved, ensuring airflow coverage and uniformity throughout the experimental cavity.

[0021] 4. The differentiated aperture design of the air inlet / outlet can flexibly adjust the airflow exchange intensity and uniformity according to different experimental scenarios, adapting to diverse temperature control needs such as insect, small animal, cell culture, drug testing, material synthesis, and electronic component aging speed, thus enhancing the system's engineering applicability. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the air duct body in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the baffle structure in Embodiment 2 of the present invention;

[0026] Figure 4 This is a schematic diagram illustrating the gas flow principle of the present invention;

[0027] Figure 5 This is a schematic diagram illustrating an embodiment of the present invention.

[0028] In the picture:

[0029] 1. Air inlet chamber; 2. Air mixing chamber; 3. Resistance wire heater; 4. Finned condenser; 5. Baffle structure; 6. Cover plate; 601. Air outlet; 602. Air inlet; 7. Circulating fan blades. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] As attached Figure 1 To be continued Figure 3 As shown:

[0032] This invention provides a temperature field equalization circulating airflow duct for use in temperature-controlled experimental environments. The circulating airflow duct is configured inside the cavity of an incubator, test chamber, or experimental chamber in a temperature-controlled experimental environment, and is used to achieve uniform distribution and circulating distribution of the temperature field inside the cavity. The circulating airflow duct includes a duct body, circulating fan blades 7, baffle structure 5, and a temperature control execution unit. The duct body is arranged in a rectangular frame. The front and rear sidewalls of the duct body are respectively provided with an air inlet chamber 1 and a mixing chamber 2. The mixing chamber 2 is adjacent to the air inlet chamber 1. The temperature control execution unit and the baffle structure 5 are arranged sequentially along the airflow path in the air inlet chamber 1. A cover plate 6 is fixed to the front of the air inlet chamber 1 and the mixing chamber 2. An air outlet 601 communicating with the mixing chamber 2 is opened at the upper front end of the cover plate 6, and an air inlet 602 communicating with the air inlet chamber 1 is opened at the lower front end of the cover plate 6.

[0033] 1. In one embodiment of the present invention, the temperature control execution unit is used to actively control the airflow entering the air inlet chamber 1. The temperature control execution unit includes a resistance wire heater 3 and a finned condenser 4. The temperature control execution unit can flexibly switch or work in concert according to experimental requirements to achieve precise temperature regulation of the airflow entering the mixing chamber, covering both heating and cooling scenarios, ensuring that the internal temperature of the chamber is accurately and stably within the target range, and meeting the stringent requirements of diverse temperature control experiments for the direction and accuracy of temperature regulation.

[0034] 2. In one embodiment of the present invention, one or more circular through holes are provided in the middle of the baffle structure 5.

[0035] 3. In one embodiment of the present invention, the bottom end of the baffle structure 5 extends downward to form a fixed edge, which is fastened to the bottom side wall of the air inlet chamber 1 by screws.

[0036] 4. In one embodiment of the present invention, the baffle structure 5 and the two side walls of the air inlet chamber 1 form a tortuous windproof channel.

[0037] 5. In one embodiment of the present invention, the circulating fan blade 7 is installed on the motor on the rear side wall of the mixing chamber 2 and is located in the circular through hole of the baffle structure 5. When the circulating fan blade 7 rotates, the driving airflow is drawn into the air inlet chamber 1 from the air inlet 602. After being adjusted by the temperature control execution unit and homogenized by the baffle structure 5, the returning air to be regulated is sent to the cavity test area from the air outlet 601 to form a closed-loop circulating airflow.

[0038] 6. In one embodiment of the present invention, the air inlet 602 is a row of oblong holes, and the air outlet 601 is a row of oblong holes. The aperture of the air inlet 602 is smaller than the aperture of the air outlet 601. The smaller aperture of the air inlet improves the airflow intake efficiency, and the smaller aperture of the air outlet enhances the uniformity of air delivery.

[0039] As attached Figure 4 As shown, the working principle is as follows: The above embodiment provides a temperature field equalization circulating airflow duct structure integrating circulating fan blades 7, Z-shaped baffles, and a temperature control execution unit. Based on an integrated airflow organization strategy of temperature regulation, mixing, homogenization, and circulation, it achieves high uniformity and precise control of the internal temperature field of the cavity. In application, the airflow is drawn into the air inlet chamber 1 from inside the cavity through the circulating fan blades 7 via the waist-shaped inlet 602. First, it is actively heated or cooled by the temperature control execution unit. Then, through the tortuous wind-blocking channel formed by the Z-shaped baffle structure 5, the airflow is forced to flow back and forth multiple times and fully mix with the returning air in the cavity, eliminating the phenomenon of hot and cold air stratification. Finally, the homogenized airflow is directed back to the experimental area of ​​the cavity through the waist-shaped outlet 601. This design significantly improves the uniformity of the temperature field and solves the technical problems of obvious temperature gradients in the edge areas and poor coordination of temperature regulation and mixing in traditional air duct systems. It is particularly suitable for experimental scenarios with stringent requirements for temperature control accuracy, such as insect, small animal, cell culture, drug testing, material synthesis, and aging rate of electronic components.

[0040] As attached Figure 5 As shown, in order to achieve efficient integration and uniform heating of the resistance wire heater 3 within a compact cavity space, the resistance wire heater 3 adopts a flat heating module, which is installed on the rear wall of the mixing chamber and around the fan blades (circulating fan blades 7). This embedded compact layout and near-wall mounting method solves the problem that traditional heaters are too large to be installed inside small experimental chambers.

[0041] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A temperature field uniform circulation guide air duct applied to a temperature-controlled experimental environment, the circulation guide air duct is arranged in the cavity of an incubator, test box or experimental box in the temperature-controlled experimental environment, and is used for realizing uniform distribution and circulation distribution of the temperature field in the cavity, and characterized in that: The circulating air duct comprises an air duct body, circulating fan blades (7), a baffle structure (5), and a temperature control execution unit. The air duct body is in the form of a rectangular frame. The front and rear sidewall regions of the air duct body are respectively provided with an air inlet chamber (1) and an air mixing chamber (2). The air mixing chamber (2) is adjacent to the air inlet chamber (1). The temperature control execution unit and the baffle structure (5) are arranged in the air inlet chamber (1) in sequence along the airflow path direction. A front side fixed cover plate (6) is arranged between the air inlet chamber (1) and the air mixing chamber (2). A front side upper end of the cover plate (6) is provided with an air outlet mesh opening (601) that is in communication with the air mixing chamber (2). A front side lower end of the cover plate (6) is provided with an air inlet mesh opening (602) that is in communication with the air inlet chamber (1). ​ 2. The temperature field equalizing circulating guide air duct for temperature controlled experimental environment of claim 1, wherein: The temperature control execution unit is used for actively controlling the airflow entering the air inlet chamber (1). The temperature control execution unit comprises a heating resistor wire heater (3) and a fin type condenser (4).

3. The temperature field equalizing circulating air duct for temperature controlled experimental environment of claim 1, wherein: One or more circular through holes are arranged in the middle of the baffle structure (5).

4. The temperature field equalizing circulating air duct for temperature controlled experimental environment of claim 1, wherein: The bottom end of the baffle structure (5) extends downward and forms a fixed edge. The fixed edge is fastened to the bottom sidewall of the air inlet chamber (1) by screws.

5. The temperature field equalizing circulating air duct for temperature controlled experimental environment of claim 4, wherein: The baffle structure (5) and the two sidewalls of the air inlet chamber (1) form a zigzag air blocking channel.

6. The temperature field equalizing circular air duct for temperature controlled environment according to claim 4, wherein: The circulating fan blades (7) are installed on a motor on the rear sidewall of the air mixing chamber (2) and are located in the circular through holes of the baffle structure (5). When the circulating fan blades (7) rotate, the airflow is sucked into the air inlet chamber (1) from the air inlet mesh opening (602). The air is adjusted in temperature by the temperature control execution unit, enters the baffle structure (5), is homogenized by the circulating fan blades (7), and is then sent to the cavity experimental area from the air outlet mesh opening (601), thereby forming a closed loop circulating airflow.

7. The temperature field equalizing circular guide air duct for temperature controlled experimental environment of claim 1, wherein: The air inlet mesh opening (602) is a row of waist-shaped holes, and the air outlet mesh opening (601) is a row of waist-shaped holes.

Images