Cooling mechanism of gas chromatographic box

Abstract

The utility model relates to a gas chromatographic box, belongs to the technical field of gas chromatographic analysis equipment, and particularly relates to a cooling mechanism of the gas chromatographic box, which comprises a box body, a fan groove is arranged at the bottom of the box body, a filter screen cover is arranged at the top of the box body, and an air inlet filter screen is arranged on the rear wall of the box body. The heat dissipation assembly is composed of a plurality of heat dissipation pipes which are connected side by side and are of a concave cross section structure, the heat dissipation pipes are vertically arranged in the fan groove and penetrate through the box body to the filter screen cover, and the outer walls of the heat dissipation pipes are attached to the inner wall of the box body. Air outlets of the cooling fans distributed in a bottom linear array face bottom openings of the cooling pipes, and movable doors are hinged to the front sides of the cooling fans to form a detection operation area. The gas chromatography box heat dissipation structure achieves the effects of efficiently dissipating heat, expanding the operation space and guaranteeing the stability of a temperature field, and solves the problems that the existing gas chromatography box heat dissipation structure occupies space, is uneven in heat dissipation and is inconvenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of gas chromatography analysis equipment technology, and in particular to a cooling mechanism for a gas chromatography chamber. Background Technology

[0002] In the field of gas chromatography analysis equipment, the internal temperature control of the gas chromatograph chamber plays a crucial role in the detection accuracy and stability of the equipment. To ensure the normal operation of the electronic components and detection parts inside the gas chromatograph chamber, an efficient cooling mechanism is needed to maintain a suitable temperature environment.

[0003] A search of Chinese patent CN221224666U reveals a rapid cooling mechanism for a gas chromatograph column oven, relating to the field of rapid cooling technology for gas chromatograph column ovens. The mechanism includes a box body with a cooling unit at the top. Through the cooperation of a slider and insert with a fixing plate, a locking groove, and a slot, the fixing plate can easily limit the mounting plate at the connection point of the heat sink, facilitating the disassembly and assembly of the heat sink and the box body. This allows for quick cleaning of the heat sink, replacement of parts, and ensures effective heat dissipation and cooling.

[0004] A search of Chinese patent CN212748826U reveals a programmed temperature control device for a gas chromatograph, comprising a housing containing a cooling fan, a chromatographic column, and a lifting mechanism. A temperature sensor is mounted on one side of the chromatographic column, and a heater and heat-conducting plate are mounted on the other side. The lifting mechanism includes a lifting rod with a heat-insulating cover that can be fastened to the chromatographic column. This programmed temperature control device for a gas chromatograph is simple in structure and small in size. It can rapidly heat up and cool down, precisely controlling the operating temperature of the chromatographic column.

[0005] Based on the above search results and existing technologies, the following findings were made:

[0006] This patent and most existing gas chromatograph cooling mechanisms have several problems. Existing gas chromatograph cooling mechanisms often have poorly designed heat dissipation structures, frequently using centrally placed radiators. This not only occupies a significant amount of internal space, resulting in a cramped detection area and inconvenient operation, but also causes turbulent airflow within the chamber, affecting the uniformity of heat dissipation. Furthermore, their air duct designs are mostly horizontal, prone to airflow short-circuiting, making it difficult to ensure a stable temperature field inside the chamber and meet the precision detection requirements of gas chromatography. In addition, some heat dissipation structures have poorly designed filtration systems, making maintenance complex and ineffective at intercepting dust and other impurities, affecting the normal operation and lifespan of the equipment. Utility Model Content

[0007] To address the aforementioned technical problems, this utility model proposes a cooling mechanism for a gas chromatograph chamber. By setting at least three sets of transverse air inlet filter screens, the filtration area of ​​the air inlet is increased, allowing the air entering the fan groove to be filtered more thoroughly, reducing the entry of dust and other impurities into the chamber. This achieves efficient filtration of the air entering the chamber, ensuring the cleanliness of the heat dissipation components and internal equipment, and extending the service life of the equipment.

[0008] The technical solution to achieve the purpose of this utility model is: a cooling mechanism for a gas chromatograph chamber, including a chamber body, and further comprising;

[0009] The fan groove is provided at the bottom of the box, a filter screen is provided at the top of the box, and an air inlet filter connected to the fan groove is provided on the rear wall of the box.

[0010] The heat dissipation assembly comprises multiple heat dissipation pipes connected in parallel, and has an overall concave cross-sectional structure. The heat dissipation assembly is vertically arranged inside the fan groove and extends upward through the inside of the box to the filter screen. The outer wall of the heat dissipation pipe is in contact with the inner surface of the left and right side walls of the box and the inner surface of the inner side wall of the box.

[0011] The cooling fans are arranged in a linear array on the bottom surface of the fan groove, and the air outlet of the cooling fans is directly facing the bottom opening of the heat dissipation pipe.

[0012] The movable door is hinged to the front wall of the enclosure, forming a testing area between it and the heat dissipation components inside the enclosure.

[0013] In some embodiments, the top of the housing is provided with a slot for the bottom of the filter screen to be snapped into place.

[0014] In some embodiments, the bottom of the filter screen is fitted with a magnetic square ring for magnetic attraction with the outer shell of the housing.

[0015] In some embodiments, at least three sets of the air intake filter mesh are arranged laterally on the back of the housing.

[0016] In some embodiments, a resilient protective gasket is installed at the bottom of the housing.

[0017] In some embodiments, a control terminal is provided on the outside of the enclosure. The control terminal includes a control box connected to the outside of the enclosure, and a display screen and a debugging panel are installed on the front side of the control box.

[0018] Compared with existing technologies, the significant advantages of this invention are:

[0019] Firstly, this invention employs a unique design that combines a concave heat dissipation component with a three-sided, flush-fitting enclosure wall. The heat dissipation component consists of multiple parallel heat dissipation pipes, whose concave cross-sectional structure fully conforms to the inner surfaces of the left, right, and rear side walls of the enclosure, extending vertically from the bottom fan groove to the top filter screen. Through the close contact between the outer wall of the heat dissipation pipes and the inner wall of the enclosure, the metal wall surface of the enclosure is directly transformed into an extended heat transfer surface, significantly improving heat conduction efficiency. Simultaneously, the concave structure forms a directional airflow channel, optimizing the airflow path generated by the cooling fan and enhancing the forced convection effect. This design achieves three-dimensional heat dissipation while arranging the heat dissipation structure close to the edge of the enclosure wall, creating a complete and open testing area in the central region of the enclosure. This completely solves the problem of limited operating space caused by traditional centrally located heat sinks and avoids turbulence interference caused by suspended heat sinks.

[0020] Secondly:

[0021] This invention features an innovative bottom-to-top vertical through-flow air duct system. Axial upward airflow is generated by a linear array of cooling fans within the fan recesses, which, combined with the concave guide structure of the heat dissipation pipes, creates directional strong convection. The top filter cover and the inlet filter on the rear wall of the chamber work together to form a bidirectional filtration barrier, ensuring efficient air circulation while achieving multi-stage dust interception. This structure, through vertical unidirectional airflow control, effectively avoids the airflow short-circuiting phenomenon of traditional horizontal air ducts, significantly improving heat dissipation uniformity and ensuring a stable internal temperature field to meet the requirements of precision detection. It solves the core problems of existing gas chromatographs, such as the heat dissipation structure occupying operating space, uneven heat dissipation due to turbulent airflow, and complex maintenance of the filtration system. Attached Figure Description

[0022] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a front three-dimensional structural diagram of the gas chromatograph cooling mechanism provided in one embodiment of the present invention;

[0024] Figure 2 This is a bottom view of the cooling mechanism of the gas chromatograph box provided in one embodiment of the present invention;

[0025] Figure 3 In one embodiment of this utility model, the cooling mechanism of the gas chromatograph is located at the bottom fan groove.

[0026] Figure 4 This is a three-dimensional structural diagram of the gas chromatograph cooling mechanism with the movable door open in one embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the internal half-section three-dimensional structure of the cooling mechanism of the gas chromatograph provided in one embodiment of the present invention;

[0028] Figure 6 This is a partial split view of the top of the cooling mechanism of the gas chromatograph provided in one embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Housing; 101. Fan recess; 102. Card slot; 2. Movable door; 3. Filter screen cover; 301. Magnetic square ring; 4. Protective gasket; 5. Heat dissipation pipe; 6. Cooling fan; 7. Inlet air filter; 8. Control housing; 801. Display screen; 802. Debugging panel. Detailed Implementation

[0031] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0032] This utility model provides an improved cooling mechanism for a gas chromatograph chamber. The technical solution of this utility model is as follows:

[0033] Example 1, as Figure 1 - Figure 5 As shown, a cooling mechanism for a gas chromatograph includes a chamber 1. A fan groove 101 is formed at the bottom of the chamber 1, a filter screen 3 is installed at the top of the chamber 1, and an air inlet filter 7 connected to the fan groove 101 is installed on the rear wall of the chamber 1. It also includes a heat dissipation assembly, which consists of multiple parallel heat dissipation pipes 5, forming a concave cross-section. The heat dissipation assembly is vertically positioned inside the fan groove 101 and extends upwards through the interior of the chamber 1 to the filter screen 3. The outer wall of the heat dissipation pipes 5 is in contact with the inner surface of the left and right side walls and the inner side wall of the chamber 1. A cooling fan 6 is also provided, arranged in a linear array on the bottom surface of the fan groove 101, with the air outlet of the cooling fan 6 facing the bottom opening of the heat dissipation pipes 5. Furthermore, a movable door 2 is hinged to the front wall of the chamber 1, forming a detection work area between itself and the heat dissipation assembly inside the chamber 1.

[0034] like Figure 2 and Figure 3As shown, in one embodiment, at least three sets of the air inlet filter 7 are arranged laterally on the back of the housing 1. By setting at least three sets of laterally arranged air inlet filter 7, the filtration area of ​​the air inlet is increased, so that the air entering the fan groove 101 can be filtered more fully, reducing the entry of dust and other impurities into the housing 1. This achieves efficient filtration of the air entering the housing 1, ensuring the cleanliness of the heat dissipation components and the equipment inside the housing 1, and extending the service life of the equipment.

[0035] like Figure 1 - Figure 5 As shown, in one embodiment, a ring of elastic protective gasket 4 is installed at the bottom of the box 1. The protective gasket 4 can buffer and reduce shock when the gas chromatograph is placed, reducing the damage to the internal equipment of the box 1 caused by collision during placement. At the same time, it can also prevent the bottom of the box 1 from directly contacting the placement surface and causing wear, thus protecting the box 1 and the internal equipment and improving the stability and reliability of the equipment.

[0036] like Figure 1 - Figure 2 As shown, in one embodiment, a control terminal is provided on the outside of the housing 1. The control terminal includes a control box 8 connected to the outside of the housing 1. A display screen 801 and an adjustment panel 802 are installed on the front of the control box 8. By providing a control terminal that includes the control box 8, the display screen 801, and the adjustment panel 802, operators can easily start and adjust the gas chromatograph, thereby achieving convenient control of the equipment and improving the efficiency and accuracy of operation.

[0037] like Figure 3 and Figure 4 As shown, in one embodiment, the heat dissipation pipes 5 of the heat dissipation assembly adopt a structure of multiple parallel connected pipes with a concave cross-section, vertically arranged in the fan groove 101 and penetrating through the housing 1 to the filter screen 3, with the outer wall surface in close contact with the inside of the housing 1. This structure increases the contact area between the heat dissipation pipes 5 and the air, while the close contact between the heat dissipation pipes 5 and the inside of the housing 1 enables more effective transfer of heat from the inside of the housing 1 to the heat dissipation pipes 5. The air blown out by the cooling fan 6 passes through the heat dissipation pipes 5, carries away the heat, and is discharged through the filter screen 3, achieving efficient heat dissipation and ensuring that the gas chromatograph is in a suitable temperature environment, which is beneficial to improving the detection accuracy and stability of the equipment. The concave structure of the heat dissipation pipes 5 also serves as a reinforcing rib, enhancing the overall structural strength of the housing 1.

[0038] Example 2, based on Example 1, such as Figure 6As shown, in one embodiment, the top of the housing 1 is provided with a slot 102 for the bottom of the filter screen 3 to be snapped in. The slot 102 allows the filter screen 3 to be stably installed on the top of the housing 1, making it easy to disassemble and install. It also prevents the filter screen 3 from shaking or shifting during use, thus achieving protection of the top of the housing 1 and effective filtration of airflow, preventing external debris from entering the housing 1 and affecting the normal operation of the gas chromatograph.

[0039] In this embodiment, a magnetic square ring 301 for magnetic attraction with the outer shell of the housing 1 is installed at the bottom of the filter screen 3. The magnetic square ring 301 further enhances the connection stability between the filter screen 3 and the housing 1. Based on the snap-fit ​​of the slot 102, the magnetic attraction makes the installation more convenient, and can better keep the filter screen 3 fixed during the operation of the equipment, thereby achieving further protection of the internal environment of the housing 1, and at the same time facilitating the cleaning and replacement of the filter screen 3.

[0040] Working principle and usage process of this utility model:

[0041] When cooling of the gas chromatograph chamber is required, the operator can start the equipment via the display screen 801 on the front of the chamber 8. At this time, the cooling fan 6 starts working, and air enters the fan recess 101 from the air inlet filter 7 on the rear wall of the chamber 1. After filtration, the air is blown by the cooling fan 6 towards the heat dissipation pipe 5. Because the heat dissipation pipe 5 is tightly fitted to the interior of the chamber 1, the heat generated inside the chamber 1 is transferred to the heat dissipation pipe 5. The air blown out by the cooling fan 6 carries away the heat from the heat dissipation pipe 5 and is discharged outside the chamber 1 through the top filter screen 3, thus cooling the interior of the chamber 1. When testing is required, the hinged door 2 on the front wall of the chamber 1 can be opened, and operations can be performed in the testing area formed between the door 2 and the heat dissipation components. When equipment debugging is required, corresponding settings and adjustments can be made via the debugging panel 802 on the front of the chamber 8. During equipment use, the protective gasket 4 effectively cushions impacts during equipment placement, reducing the risk of equipment damage. Meanwhile, the magnetic filter screen 3 can be cleaned and replaced regularly to ensure the normal operation of the equipment.

[0042] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. A cooling mechanism for a gas chromatograph chamber, comprising a chamber body (1), characterized in that: Also includes; Fan groove (101), the bottom of the box (1) is provided with fan groove (101), the top of the box (1) is provided with filter screen cover (3), and the rear wall of the box (1) is provided with air inlet filter screen (7) connected to the fan groove (101). The heat dissipation assembly comprises multiple heat dissipation pipes (5) connected in parallel, and has a concave cross-section structure. The heat dissipation assembly is vertically arranged inside the fan groove (101) and extends upward through the inside of the box (1) to the filter screen (3). The outer wall of the heat dissipation pipe (5) is in contact with the left and right side walls inside the box (1) and the inner surface of the inner side wall of the box (1). Cooling fan (6), the cooling fan (6) is arranged in a linear array on the bottom surface of the fan groove (101), and the air outlet of the cooling fan (6) is directly facing the bottom opening of the heat dissipation pipe (5); The movable door (2) is hinged to the front wall of the box (1) and forms a testing area with the heat dissipation components inside the box (1).

2. The gas chromatograph cooling mechanism according to claim 1, characterized in that: The top of the housing (1) is provided with a slot (102) for the bottom of the filter screen (3) to be snapped in.

3. The gas chromatography chamber cooling mechanism according to claim 1, characterized in that: The bottom of the filter screen (3) is equipped with a magnetic square ring (301) for magnetic attraction with the outer shell of the box (1).

4. The gas chromatography chamber cooling mechanism according to claim 1, characterized in that: At least three sets of the air intake filter (7) are arranged laterally on the back of the housing (1).

5. The gas chromatography chamber cooling mechanism according to claim 1, characterized in that: The bottom of the box (1) is fitted with a ring of elastic protective gasket (4).

6. A gas chromatograph cooling mechanism according to any one of claims 1-5, characterized in that: The outer side of the housing (1) is provided with a control terminal, which includes a control box (8) connected to the outer side of the housing (1). The front side of the control box (8) is equipped with a display screen (801) and a debugging panel (802).

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