Gas circulating device for constant weight weighing system
By designing a gas circulation device in the constant weight weighing system, and utilizing the coordinated operation of the air intake channel, processing chamber, and fan, stable gas circulation is achieved, solving the problems of inaccurate weighing and uneven cooling caused by direct airflow, and improving the cooling effect and weighing accuracy.
Patent Information
- Application Number
- CN202520341400.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-02-28
AI Technical Summary
In existing auxiliary cooling devices in constant weight weighing systems, the airflow blows directly onto the object to be weighed, causing particles to detach and affecting the accuracy of the weighing results. Furthermore, airflow disturbances lead to uneven cooling, affecting the cooling effect.
Design a gas circulation device for a constant weight weighing system. Through the coordinated operation of the air inlet channel, the processing chamber and the fan, the gas in the closed chamber is circulated. The gas is guided into the processing chamber by the air inlet and discharged from the air outlet by the fan. Combined with the cold source component and the heating component, the gas temperature and humidity are regulated to ensure that the gas flows evenly in the chamber.
It improves the stability and uniformity of gas flow in the enclosed chamber, avoids direct gas blowing, enhances the cooling effect on the object to be weighed, and ensures the accuracy of the weighing results and the efficiency of drying and weighing.
Smart Images
Figure CN223840877U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drying and weighing technology, specifically to a gas circulation device for a constant weight weighing system. Background Technology
[0002] A constant-weight weighing system is a device used to accurately measure the weight of objects. To improve weighing accuracy, constant-weight weighing systems typically place the object to be weighed and the weighing device in a closed chamber to eliminate the influence of temperature and humidity variations in the laboratory environment on the weighing results. For example, in an integrated drying and weighing system, the object to be weighed is automatically dried and weighed in a closed chamber according to standard requirements or procedures.
[0003] After drying, the objects to be weighed generally need to be cooled to room temperature before being weighed. To accelerate the cooling process, an auxiliary cooling device is installed in the weighing chamber, using a fan to accelerate gas flow and provide a good heat dissipation environment for the objects to be weighed within the chamber.
[0004] However, in actual use, existing auxiliary cooling devices often suffer from airflow that blows directly onto the object to be weighed within the weighing chamber. The impact of this airflow can cause fine particles to detach from the object, thus affecting the accuracy of the weighing results. Furthermore, the turbulence in the airflow can lead to uneven cooling of the object, impacting the overall cooling effect. Summary of the Invention
[0005] The purpose of this invention is to provide a gas circulation device for use in constant weight weighing systems, so as to improve the stability of gas flow in a closed chamber and enhance the cooling effect on the object to be weighed.
[0006] To achieve the above objectives, this utility model proposes a gas circulation device for a constant weight weighing system, including an air inlet channel, a processing chamber, and a fan.
[0007] The air intake channel is located on the inner wall of the closed chamber and is connected to the processing chamber. An air inlet is provided at the end of the air intake channel. The air intake channel is configured to guide the gas in the closed chamber into the processing chamber through the air inlet.
[0008] The fan is installed in the processing chamber, and an air outlet is provided on the side wall of the processing chamber. The fan is configured to draw gas from the closed chamber into the processing chamber through the air inlet and the air inlet channel, and discharge the gas from the air outlet.
[0009] Preferably, a cooling source component is provided in the processing chamber, which is configured to cool and dehumidify the gas entering the processing chamber.
[0010] Preferably, a heating element is installed between the cold source component and the fan.
[0011] Preferably, the enclosed chamber is equipped with a bracket for supporting the object to be weighed, and a channel is provided between the bottom of the bracket and the bottom of the enclosed chamber, with the air outlet lower than the bottom of the bracket.
[0012] Preferably, the air outlet is connected to an exhaust duct, which is arranged along the bottom edge of the enclosed compartment, and an air outlet grille is provided on the side wall of the exhaust duct.
[0013] Preferably, the air outlet grille is located on the exhaust duct on the side away from the air inlet.
[0014] Preferably, the air intake passage is L-shaped.
[0015] Preferably, the air intake passage includes a vertical section and a horizontal section connected in sequence. The vertical section is configured to extend downwards along the height direction of the enclosed compartment to the bottom of the enclosed compartment, forming a sunken structure.
[0016] Compared with the prior art, the gas circulation device for constant weight weighing system provided by this utility model has the following substantial features and advancements:
[0017] 1. The gas circulation device for the constant weight weighing system can achieve effective gas circulation in the closed chamber through the coordinated operation of the air inlet channel, the processing chamber and the fan. The air inlet channel is arranged on the inner wall of the closed chamber. The air inlet guides the gas in the closed chamber into the processing chamber. Then, the fan draws the gas from the air inlet through the air inlet channel into the processing chamber and discharges the gas from the air outlet. This allows the gas in the closed chamber to flow and renew continuously, ensuring the uniformity and stability of the gas environment in the chamber. It also avoids the gas directly blowing onto the object to be weighed, thus improving the cooling effect on the object to be weighed.
[0018] 2. The gas circulation device for constant weight weighing system has a compact and reasonable overall structure, does not occupy too much extra space in the sealed chamber, is suitable for use in constant weight weighing system, can realize gas circulation function in limited space, provides a good heat dissipation environment for the object to be weighed in the sealed chamber, and is conducive to improving drying and weighing efficiency. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of a gas circulation device for a constant weight weighing system according to an embodiment of this utility model.
[0020] Figure 2 This is a schematic diagram of the assembly structure of a gas circulation device and bracket for a constant weight weighing system according to an embodiment of this utility model.
[0021] Figure 3 This is a schematic diagram of the assembly structure of a gas circulation device connected to an exhaust pipe for a constant weight weighing system according to an embodiment of this utility model.
[0022] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure at point AA.
[0023] Reference numerals: 1. Enclosed compartment; 2. Air intake passage; 3. Processing chamber; 4. Fan; 5. Air inlet; 6. Air outlet; 7. Cold source component; 8. Heating component; 9. Bracket; 10. Exhaust duct; 11. Air outlet grille. Detailed Implementation
[0024] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0025] like Figures 1-4 As shown in the embodiment of this utility model, a gas circulation device for a constant weight weighing system is proposed, which aims to improve the stability of gas flow in a closed chamber and enhance the cooling effect on the object to be weighed.
[0026] The gas circulation device for a constant weight weighing system proposed in this embodiment of the invention achieves effective gas circulation within a closed chamber through the coordinated operation of an air intake channel, a processing chamber, and a fan. The air intake channel is located on the inner wall of the closed chamber, and the gas in the closed chamber is guided into the processing chamber through the air intake port. Then, the fan draws the gas from the air intake port through the air intake channel into the processing chamber and discharges the gas from the air outlet. This allows the gas in the closed chamber to flow and renew continuously, ensuring the uniformity and stability of the gas environment within the chamber. It also avoids direct blowing of gas onto the object to be weighed, thus improving the cooling effect on the object to be weighed.
[0027] like Figure 1 As shown, a gas circulation device for a constant weight weighing system includes an air inlet channel 2, a processing chamber 3, and a fan 4. The air inlet channel 2 is located on the inner wall of the enclosed chamber 1. The air inlet channel 2 is connected to the processing chamber 3. An air inlet 5 is provided at the end of the air inlet channel 2. The air inlet channel 2 is configured to guide the gas in the enclosed chamber 1 into the processing chamber 3 via the air inlet 5.
[0028] like Figure 1 As shown, the fan 4 is installed in the processing chamber 3. An air outlet 6 is provided on the side wall of the processing chamber 3. The fan 4 is configured to draw gas from the enclosed chamber 1 into the processing chamber 3 through the air inlet 5 and the air inlet passage 2, and discharge the gas from the air outlet 6.
[0029] In this system, the blower 4 is the power source that drives the gas circulation throughout the entire device. Within the enclosed chamber 1, the gas itself is in a relatively static or slow-moving state, making it difficult to spontaneously form an effective circulation. The suction and pressure difference generated by the blower 4 are the key driving forces for gas circulation. The blower 4 draws gas from the enclosed chamber 1 through the inlet 5 of the inlet channel 2, and then into the processing chamber 3 via the inlet channel 2. The blower 4 then discharges the gas into the processing chamber 3 through the outlet 6, continuously circulating the gas within the enclosed chamber 1 to ensure smooth gas circulation. For example, the blower 4 can be either a centrifugal blower or an axial flow blower, depending on the gas circulation requirements of the constant weight weighing system.
[0030] To further improve the gas flow, this embodiment of the invention also includes further optimized design of the intake channel 2, such as... Figure 1 As shown, the air intake channel 2 is L-shaped. This design allows the L-shaped bend to act as a buffer when gas enters the L-shaped air intake channel 2 from the air intake port 5. When the gas encounters the L-shaped bend during its flow, its flow direction changes, resulting in a more uniform gas velocity distribution and reducing turbulence and vortex phenomena. Through the rectifying effect of the L-shaped channel, the gas entering the processing chamber 3 flows in a more stable and uniform manner, which is beneficial for improving the subsequent gas treatment effect.
[0031] In addition, the L-shaped intake channel 2 has a relatively larger internal surface area compared to a straight channel. During gas flow, the larger contact area allows for more thorough heat exchange between the gas and the inner wall of the intake channel 2. For example, if the inner wall of the intake channel 2 has a certain adsorption or filtration function, the larger contact area allows impurities, water vapor, etc., in the gas to come into more thorough contact with the inner wall and be removed, further improving the quality of the gas entering the processing chamber 3.
[0032] like Figure 1 As shown, the air intake passage 2 includes a vertical section and a horizontal section connected in sequence. The vertical section is configured to extend downwards along the height direction of the enclosed compartment 1 to the bottom of the enclosed compartment 1, forming a sunken structure.
[0033] According to some preferred embodiments of the present invention, such as Figure 1 As shown, a cooling source component 7 is installed inside the processing chamber 3. The cooling source component 7 is configured to cool and dehumidify the gas entering the processing chamber 3. By using the cooling source component 7 to lower the temperature of the gas, the water vapor in the gas is liquefied upon contact with the cold air.
[0034] For example, the cold source component 7 can be a compressor refrigeration system or a semiconductor refrigeration device. Considering the overall structure of the constant weight weighing system and the limited internal space in the processing chamber 3, the cold source component 7 is preferably a semiconductor refrigeration device.
[0035] like Figure 1 As shown, a heating element 8 is installed between the cold source component 7 and the fan 4. The heating element 8 is used to heat the low-temperature gas, thereby achieving precise control of the gas temperature and ensuring that the gas temperature entering the sealed chamber 1 remains stable near the set value, reducing the impact of temperature fluctuations on the measurement of object mass.
[0036] For example, heating element 8 can be selected as a resistance wire heater or a ceramic heater according to actual needs.
[0037] like Figure 2 As shown, a bracket 9 for supporting the object to be weighed is provided inside the enclosed chamber 1. A channel is provided between the bottom of the bracket 9 and the bottom of the enclosed chamber 1. The air outlet 6 is lower than the bottom of the bracket 9. This lower position of the air outlet 6 allows the gas discharged from the air outlet 6 to first flow at the bottom of the enclosed chamber 1, and then diffuse upwards through the channel between the bottom of the bracket 9 and the bottom of the enclosed chamber 1, promoting a stable and reasonable airflow circulation path within the enclosed chamber 1. The gas flows upwards from the bottom, avoiding direct impact on the object to be weighed.
[0038] To further optimize the airflow circulation path in enclosed compartment 1, such as Figure 3 As shown, the air outlet 6 is connected to an exhaust duct 10. The exhaust duct 10 is arranged along the bottom edge of the enclosed compartment 1. Figure 4 As shown, an air outlet grille 11 is provided on the side wall of the exhaust duct 10.
[0039] In this way, the exhaust duct 10 is arranged along the bottom edge of the enclosed chamber 1, and the side wall is equipped with an exhaust grille 11, allowing gas to enter the enclosed chamber 1 from multiple locations in a relatively dispersed manner. The layout of the bottom edge and the placement of the exhaust grille 11 help cover all corners of the enclosed chamber 1, effectively eliminating any potential airflow dead zones. Through uniform gas diffusion, it can be ensured that all gas within the enclosed chamber 1 participates in circulation, maintaining a stable gas environment.
[0040] like Figure 4 As shown, the air outlet grille 11 is located on the exhaust duct 10 on the side away from the air inlet 5. This arrangement helps to prevent gas from flowing directly from the air outlet grille 11 to the air inlet 5, thus avoiding a short circuit. By rationally arranging the positions of the air outlet grille 11 and the air inlet 5, it is ensured that the gas can flow along a predetermined circulation path.
[0041] In this embodiment of the present invention, a gas circulation device for a constant weight weighing system is used such that, under the suction of the fan 4, the gas in the sealed chamber 1 begins to enter the system from the air inlet 5 at the end of the air inlet channel 2. The fan 4, as the power source for gas circulation, continuously operates to generate suction, allowing the gas to flow smoothly from the air inlet 5 through the air inlet channel 2 into the processing chamber 3.
[0042] After entering the processing chamber 3, the gas first passes through the cooling source component 7. The cooling source component 7 cools and dehumidifies the incoming gas according to the parameters set by the system. By lowering the gas temperature, the water vapor in the gas liquefies upon contact with the cold air, thereby reducing the moisture content and humidity of the gas. After being processed by the cooling source component 7, the gas is appropriately heated by the heating component 8 according to the temperature requirements of the constant weight weighing system, achieving precise temperature control and ensuring that the gas temperature remains stable within a suitable range.
[0043] After being processed by the processing chamber 3, the gas is discharged from the air outlet 6 on the side wall of the processing chamber 3 under the action of the fan 4. The air outlet 6 is connected to the exhaust duct 10, which is arranged along the bottom edge of the closed chamber 1. The exhaust duct 10 is provided with an exhaust grille 11 on its side wall. The exhaust grille 11 is located on the exhaust duct 10 on the side away from the air inlet 5, so that the gas can enter the closed chamber 1 from multiple positions in a more dispersed manner, avoiding the gas from concentrating in a certain area and making the gas diffuse more evenly in the closed chamber 1.
[0044] The gas discharged from the air outlet grille 11 enters the closed chamber 1, comes into full contact with the object to be weighed, and is then drawn back into the air inlet 5 and re-enters the processing chamber 3 for circulation processing.
[0045] This utility model is not limited to the specific technical solutions described in the above embodiments. Besides the above embodiments, this utility model may have other implementation methods. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A gas circulation device for a constant weight weighing system, installed within the enclosed chamber (1) of the constant weight weighing system, characterized in that, It includes an air intake channel (2), a processing chamber (3), and a fan (4); The air intake channel (2) is arranged on the inner wall of the closed chamber (1). The air intake channel (2) is connected to the processing chamber (3). An air inlet (5) is provided at the end of the air intake channel (2). The air intake channel (2) is configured to guide the gas in the closed chamber (1) into the processing chamber (3) through the air inlet (5). The fan (4) is installed in the processing chamber (3), and an air outlet (6) is provided on the side wall of the processing chamber (3). The fan (4) is configured to draw gas from the closed chamber (1) into the processing chamber (3) through the air inlet (5) and the air inlet channel (2), and discharge the gas from the air outlet (6).
2. The gas circulation device for a constant weight weighing system according to claim 1, characterized in that, The processing chamber (3) is provided with a cold source component (7), which is configured to cool and dehumidify the gas entering the processing chamber (3).
3. The gas circulation device for a constant weight weighing system according to claim 2, characterized in that, A heating element (8) is provided between the cold source component (7) and the fan (4).
4. The gas circulation device for a constant weight weighing system according to any one of claims 1-3, characterized in that, The enclosed chamber (1) is provided with a bracket (9) for supporting the object to be weighed. A channel is provided between the bottom of the bracket (9) and the bottom of the enclosed chamber (1). The air outlet (6) is lower than the bottom of the bracket (9).
5. The gas circulation device for a constant weight weighing system according to any one of claims 1-3, characterized in that, The air outlet (6) is connected to an exhaust duct (10), which is arranged along the bottom edge of the enclosed chamber (1). An air outlet grille (11) is provided on the side wall of the exhaust duct (10).
6. The gas circulation device for a constant weight weighing system according to claim 5, characterized in that, The air outlet grille (11) is located on the exhaust duct (10) on the side away from the air inlet (5).
7. The gas circulation device for a constant weight weighing system according to claim 1, characterized in that, The air intake channel (2) is L-shaped.
8. The gas circulation device for a constant weight weighing system according to claim 7, characterized in that, The air intake channel (2) includes a vertical section and a horizontal section connected in sequence. The vertical section is configured to extend downward along the height direction of the enclosed compartment (1) to the bottom of the enclosed compartment (1), forming a sunken structure.