Detection box of liquid chromatograph

Abstract

The utility model belongs to the technical field of material analysis instruments, and particularly relates to a detection box of a liquid chromatograph, which comprises a shell, and a light source and a detection element which are arranged in the shell, the LED lamp further comprises a partition plate detachably arranged in the shell, a closed heat dissipation space surrounding the lamp source is formed among the partition plate, the bottom wall of the shell and the side wall of the first side of the shell, and the heat dissipation space extends from the first side to the third side of the shell. By means of the structure, the fixed-point heat dissipation scheme is comprehensively provided, a large amount of heat generated by the lamp source is limited to a limited area, and the heat is rapidly led out by setting a guiding path, namely, the direct-flow type convection air channel.

Description

TECHNICAL FIELD

[0001] The utility model belongs to material analysis instrument technical field, concretely relates to a detection box of liquid chromatograph. BACKGROUND

[0002] Liquid chromatograph is one kind of analysis instrument that is widely used in chemical analysis, biomedical, environmental monitoring and other fields, and it realizes qualitative and quantitative analysis of each component in complex mixture by separating and detecting sample in mobile phase.

[0003] Among them, in liquid chromatograph, ultraviolet detector is one of the most commonly used detection means, and the light source (that is, light source) of ultraviolet detector usually adopts deuterium lamp and tungsten lamp arranged in detection box. Deuterium lamp can provide 190-400nm continuous ultraviolet spectrum, and is suitable for detecting compounds with strong ultraviolet absorption; Tungsten lamp is mainly used for detection in visible light region (400-700nm).

[0004] However, the two kinds of lamps will generate a large amount of heat when working, and the working temperature is usually high. For example, the working temperature of deuterium lamp can reach more than 200 DEG C, and the working temperature of tungsten lamp can also reach hundreds of degrees Celsius. In high temperature environment, the heat dissipation problem of light source becomes one of the key factors affecting the performance of liquid chromatograph. If the heat dissipation effect is poor, the following problems may occur:

[0005] Shorten the life of light source: high temperature can accelerate the aging and evaporation of filament, reduce the service life of light source.

[0006] The detection accuracy decreases: temperature change will affect the light intensity and wavelength stability of light source, and then affect the accuracy and repeatability of detection results.

[0007] The risk of instrument failure increases: too high temperature may cause damage to other components inside the detector, affecting the normal operation of the instrument.

[0008] Therefore, how to effectively solve the heat dissipation problem of light source in liquid detection box is of great significance to improve the performance and reliability of the instrument. At present, although there are some heat dissipation technologies applied to liquid chromatograph in the market, these technologies still have problems such as low heat dissipation efficiency, complex structure and high cost. Therefore, it is of great research value and application prospect to develop a kind of efficient, stable and low-cost heat dissipation device for improving the overall performance of liquid chromatograph. UTILITY MODEL CONTENT

[0009] The utility model aims at providing a detection box of liquid chromatograph to improve the working stability of chromatograph.

[0010] In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions:

[0011] A detection box of a liquid chromatograph, comprising a housing, and a lamp source and a detection element arranged inside the housing;

[0012] Further comprising a partition plate detachably arranged inside the housing, the partition plate and the bottom wall of the housing and the side wall of the first side of the housing form a closed heat dissipation space enclosing the lamp source, the heat dissipation space extends along the first side to the third side of the housing;

[0013] The heat dissipation space is divided into a cooling area, a flow channel and a heat dissipation area from the first end to the second end in sequence, at least one side wall of the cooling area is provided with an air inlet, the air inlet is provided with a suction device, the lamp source is arranged in the cooling area and corresponds to the suction device; the heat dissipation area is provided with an air outlet corresponding to the third side of the housing, and the air outlet is provided with an exhaust device; accordingly, the housing is respectively provided with at least one air inlet hole corresponding to the suction device and an air outlet hole corresponding to the exhaust device.

[0014] As an improvement, the flow channel is divided into an accumulation section, an acceleration section and a buffer section from the first end to the second end in sequence, the inner diameter of the acceleration section is smaller than the inner diameters of the accumulation section and the buffer section.

[0015] As an improvement, the acceleration section comprises a plurality of narrowing sections and a plurality of recovery sections arranged alternately, the inner diameter of the narrowing section is smaller than the inner diameter of the recovery section.

[0016] As an improvement, the inner diameter of the acceleration section is 40%-60% of the inner diameters of the cooling area and / or the heat dissipation area.

[0017] As an improvement, the inner diameter of the accumulation section gradually decreases from the first end to the second end, and the inner diameter of the buffer section gradually increases from the first end to the second end, so that the flow channel is X-shaped.

[0018] As an improvement, the partition plate is arranged close to the second side of the housing, and the detection element is arranged close to the fourth side of the housing, so that an isolation space is formed between the detection element and the heat dissipation space.

[0019] As an improvement, the air inlet is provided with two, and the two air inlets are respectively located at the top and the second side of the partition plate.

[0020] As an improvement, the two side edges of the partition plate in contact with the bottom wall of the housing respectively extend to both sides of the heat dissipation space to form a hem parallel to the bottom wall, and the bottom wall is provided with at least two clamping blocks;

[0021] When the two said edge folds are fixed by the said at least two blocks respectively, the edge folds are attached to the bottom wall.

[0022] As an improvement, the first end of the partition is provided with an opening corresponding to the first side of the shell.

[0023] The shell is externally provided with a detection space, which is located at the first side of the shell, and the detection space comprises a sample detection area and a mounting area, the sample detection area is provided with an inspection window corresponding to the opening, and the mounting area is detachably provided with a water guide pipe.

[0024] As an improvement, a plurality of first magnetic elements are arranged on the shell; the detection box further comprises a magnetic suction door, and a plurality of second magnetic elements corresponding to the first magnetic elements are arranged on the magnetic suction door.

[0025] When the magnetic suction door is installed on the shell through the second magnetic elements and the first magnetic elements, the shell and the magnetic suction door enclose the closed detection space.

[0026] The principle and beneficial technical effects of the utility model are as follows:

[0027] In the case that the external (the operation area where the chromatograph is located, excluding the space inside the chromatograph) environment temperature is relatively high, the application provides a fixed-point heat dissipation scheme for limiting a large amount of heat generated by the light source to a limited area and quickly leading out the heat through the set guide path, namely the "direct current type" convection air duct.

[0028] Specifically, the scheme synchronously introduces cold air into the heat dissipation space and extracts hot air from the heat dissipation space by arranging the heat dissipation space extending along the first side to the third side of the shell and cooperating with the air suction device and the air exhaust device located on both sides of the heat dissipation space, so that the air inside the heat dissipation space is quickly drained from the first end to the second end and discharged, realizing the rapid concentrated heat dissipation of the light source. On the one hand, a large amount of heat generated by the light source can be concentrated in the heat dissipation space, so as to prevent the heat from spreading outside the heat dissipation space and causing adverse effects on the detection elements in the shell or the area where the water guide pipe is located on the shell. On the other hand, the drainage channel can buffer the heat, that is, the heat generated by the light source can be quickly dispersed into the drainage channel, so as to prevent the problem of excessively high temperature of the light source. The "direct current type" air duct design can make the airflow path clear, thereby efficiently taking out the heat from the channel and avoiding the accumulation of heat in the channel.

[0029] Further, based on the case that the drainage channel is long (that is, penetrates through the whole shell), the application divides the drainage channel into multiple functional zones with different inner diameters. During the working process of the chromatograph, the cold air enters the cooling zone at the first end of the heat dissipation space, and after fully exchanging heat with the light source, the acceleration of the acceleration section causes the negative pressure of the gathering section, and then the hot air is quickly guided to the gathering section for gathering, so as to prevent the mixed hot air after heat exchange from mixing with the cold air newly entering the cooling zone, reduce the heat dissipation effect, and ensure that the air around the light source has a large temperature difference with the light source, and then the hot air gathered in the gathering section is quickly discharged to the buffer section, and then discharged under the action of the exhaust device. On the one hand, it can reduce the escape or conduction of hot air from the acceleration section to the cavity (that is, other areas outside the heat dissipation space in the shell), and on the other hand, it can facilitate the exhaust device at the second end of the heat dissipation space to discharge the hot air. Further, due to the effect of the difference in inner diameters of the acceleration section and the buffer section, the hot air at the second end of the heat dissipation space can also be effectively prevented from flowing back to the first end. That is, the application also provides a "quick drainage anti-backflow heat dissipation structure". BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, each element or part is not necessarily drawn according to the actual proportion. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0031] Figure 1 It is a schematic diagram of the overall structure of the chromatograph in the embodiment of the present application.

[0032] Figure 2 It is a schematic diagram of the structure of the detection box in an exemplary embodiment of the present application.

[0033] Figure 3 It is a schematic diagram of the structure of the detection box in another exemplary embodiment of the present application.

[0034] Figure 4 It is a schematic diagram of the structure of the magnetic attraction door in the embodiment of the present application.

[0035] Figure 5 It is a schematic diagram of the detection box from another angle in the embodiment of the present application.

[0036] Figure 6 It is a schematic diagram of the detection box showing four sides in the embodiment of the present application.

[0037] Figure 7 It is the internal structure schematic view of the detection box in the embodiment of the utility model;

[0038] Figure 8 It is the internal structure schematic view of the detection box after removing the partition plate in the embodiment of the utility model;

[0039] Figure 9 It is the partial schematic view of the detection box in the embodiment of the utility model;

[0040] Figure 10 It is another partial schematic view of the detection box in the embodiment of the utility model;

[0041] Figure 11 It is the explosion view of the internal structure of the detection box in the embodiment of the utility model;

[0042] Figure 12 It is the installation structure schematic view of the water guide pipe in the embodiment of the utility model;

[0043] Figure 13 It is the partial installation structure schematic view of the water guide pipe in the embodiment of the utility model;

[0044] Figure 14 It is the installation relation schematic view of the water guide pipe and the water guide column in the embodiment of the utility model;

[0045] Figure 15 It is the partial structure schematic view of the column temperature box in the embodiment of the utility model;

[0046] Figure 16 It is the partition structure schematic view of the heat dissipation space in the embodiment of the utility model;

[0047] Figure 17 It is the internal structure schematic view of the drainage passage in the embodiment of the utility model;

[0048] Figure 18 It is the internal structure schematic view of another exemplary drainage passage in the embodiment of the utility model;

[0049] Figure 19 It is the explosion view of the drainage system in the embodiment of the utility model;

[0050] Figure 20 It is the partial side view of the column temperature box in the embodiment of the utility model;

[0051] Figure 21 It is the partial schematic view of the display fixing clamp structure in the column temperature box in the embodiment of the utility model;

[0052] Figure 22 It is the sectional view of the column temperature box in the embodiment of the utility model.

[0053] Marked in the figure: 1, tray; 2, infusion apparatus; 3, column temperature box; 300, shell; 301, heat conduction part; 302, mounting piece; 303, chromatographic column; 304, fixed clamp; 341, upper clamp piece; 342, lower clamp piece; 343, guide space; 344, clamping space; 345, connecting part; 305, heating tube; 306, temperature sensor; 307, cold end; 308, elastic piece; 309, pull rod motor; 310, heat dissipation fin; 311, heat dissipation fan; 312, refrigeration fin; 4, detection box; 401, first side; 402, second side; 403, third side; 404, fourth side; 41, shell; 411, air inlet hole; 412, air outlet hole; 413, first magnetic element; 42, detection element; 43, detection space; 431, sample detection area; 432, mounting area; 433, limiting step; 434, limiting protrusion; 435, slot; 436, groove; 44, clamping block; 45, magnetic attraction door; 451, second magnetic element; 46, light source; 5, baffle; 51, hem; 52, air inlet; 53, air outlet; 54, mounting plate; 6, air suction device; 7, air exhaust device; 8, water guide column; 81, buckle; 82, water guide cavity; 83, water guide channel; 84, transition section; 85, connecting section; 9, water guide pipe; 10, water guide groove; 11, waste liquid outlet; 12, heat insulation cotton; 13, cooling area; 14, drainage channel; 141, gathering section; 142, acceleration section; 1421, narrowing section; 1422, recovery section; 143, buffer section; 15, heat dissipation area; 16, maintenance window. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0055] Herein, using suffixes such as "module", "component", or "unit" for elements is merely for the convenience of description of the present application, and has no specific meaning by itself. Therefore, "module", "component", or "unit" can be used mixedly. Herein, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front", "back", "one end", "the other end", and the like is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of description of the present application and simplification of description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", are merely for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0056] Herein, unless otherwise explicitly specified and limited, the terms "mount", "provided with", "connected", and the like should be understood broadly, for example, "connected" can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be directly connected, can be indirectly connected through an intermediate medium, or can be internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Herein, "a plurality of" means two or more, that is, it includes two, three, four, five, and the like.

[0057] Embodiment one

[0058] In the prior art, the heat dissipation mode of the chromatograph is to set an air extraction device on the side wall of the detection box to extract the hot air distributed in the inside of the detection box, so as to achieve the purpose of heat dissipation. For example, the Chinese utility model patent with the application number 202120699737.2 discloses an ion chromatograph; wherein the light source (usually refers to deuterium lamp and tungsten lamp, that is, heat source) is exposed to the entire cavity of the detection box, and a large amount of heat generated by the light source will be quickly distributed to the entire cavity. In the case of low ambient temperature such as cold storage, even if the heat is distributed to the inside of the cavity, the heat in the cavity exchanges heat with the cold air in the environment, and the air extraction device arranged on the side wall of the detection box can also basically realize the cooling of the cavity. However, this mode at least has the following defects: for example, the heat generated by the light source is distributed to the entire cavity of the detection box without distinction, and after the detection elements located in the cavity are heated, it is extremely likely to cause inaccurate measurement results; for another example, if some elements in the detection box (for example, the water guide pipe located in the detection cavity) are exposed to a high-temperature environment for a long time, it is inevitable that the aging of the elements will be accelerated.

[0059] In addition, if the ambient temperature is high (for example, in a general laboratory, especially in the case of summer power saving, the air conditioner temperature cannot be adjusted too low, at this time the indoor temperature is about 20-25°), at this time if a large amount of heat is stored in the cavity, and the heat exchange speed between the heat in the cavity and the air in the environment is slow, at this time the air extraction device arranged on the side wall of the detection box is difficult to realize the rapid cooling of the cavity.

[0060] The application comprehensively provides a fixed-point heat dissipation scheme for limiting a large amount of heat generated by a lamp source to a limited area and quickly leading out the heat through a set guiding path, that is, a direct-current type convection air duct.

[0061] Specifically, the embodiment is basically as shown in the accompanying drawings. Figures 1-17

[0062] Referring to Figure 1 The utility model provides a kind of liquid chromatograph, including tray 1, infusion set 2, column oven 3 and detection box 4 sequentially arranged from top to bottom.

[0063] In some embodiments, referring to Figure 15 The column oven includes a heat-conducting space for mounting a heating device and a refrigeration device, and a mounting space for mounting a chromatographic column. A heat-conducting portion 301 is arranged between the heat-conducting space and the mounting space. The heat-conducting space and the mounting space are separated by the heat-conducting portion 301. The heat-conducting portion 301 is provided with a mounting member 302 on the side close to the mounting space. The mounting member 302 is provided with a plurality of clamping grooves of different lengths. The chromatographic column 303 can be clamped in the clamping grooves. It should be noted that the mounting member is also made of heat-conducting material. That is, the heat generated by the heating device or the cold source generated by the refrigeration device in the heat-conducting space can be sequentially transmitted to the chromatographic column through the heat-conducting portion and the mounting member in a surface contact manner. Compared with the conventional heating method by introducing hot air, the chromatographic column in the present scheme is heated by surface contact, which has better heating effect. Furthermore, the clamping grooves in the present application are provided with a plurality of different lengths, which can match chromatographs of different lengths and have wider applicability.

[0064] Referring to Figure 2 and Figure 3 The detection box includes a housing 41, a lamp source and a detection element arranged inside the housing 41. A detection space 43 is arranged on the first side of the housing. The detection space 43 is located outside the housing 41.

[0065] Referring to Figures 7-11 ​The shell 41 is detachably provided with a partition plate 5, which forms a closed heat dissipation space around the light source 46 with the bottom wall of the shell 41 and the side wall of the first side of the shell. The heat dissipation space extends along the first side to the third side of the shell. That is, the heat dissipation space is a straight channel, and the hot air in the heat dissipation space can be directly discharged from the first end to the second end, so that the heat dissipation efficiency is high.

[0066] Referring to Figure 16 The heat dissipation space is sequentially divided into a cooling area 13, a flow channel 14 and a heat dissipation area 15 from the first end to the second end. The cooling area 13 is provided with an air inlet 52 on at least one side wall, and the air inlet 52 is provided with a suction device 6. The light source 46 is arranged in the cooling area 13 and corresponds to the suction device 6. The heat dissipation area 15 is provided with an air outlet 53 corresponding to the third side of the shell 41, and the air outlet 53 is provided with an exhaust device 7. Correspondingly, referring to Figure 5 The shell is respectively provided with at least one air inlet hole 411 corresponding to the suction device and an air outlet hole 412 corresponding to the exhaust device. That is, the air inlet is arranged on the side wall of the shell, and the air outlet is arranged on the back side of the shell, which does not affect the operation of the user. That is, the air inlet and the air outlet are respectively located at the two ends of the heat dissipation space, and the heat dissipation space penetrates through the entire interior of the shell.

[0067] In some embodiments, referring to Figure 11 The partition plate is an n-shaped partition plate, and the two ends of the n-shaped partition plate are open. The opening at the second end of the partition plate is provided with a mounting plate 54, and the exhaust device is arranged on the mounting plate 54. When the partition plate 5 and the mounting plate 54 are installed in the shell 41, the partition plate 5, the mounting plate 54 and the bottom wall and the side wall of the first side of the shell 41 form a heat dissipation space.

[0068] In some embodiments, the suction device and the exhaust device are both fans (preferably silent fans).

[0069] The present application corresponds the light source (i.e. heat source) to the cooling area, and the cold air sucked by the suction device is directly blown to the light source, which can directly and quickly cool the light source. The hot air generated by the heat exchange of the cold air blown through the light source enters the flow channel for buffering, and then is extracted by the exhaust device arranged at the back side of the detection box. On the one hand, the airflow path is clear, so that the heat can be efficiently taken out of the channel, avoiding the accumulation of heat in the channel. Moreover, due to the design of the acceleration section of the channel and the straight and hollow structure of the channel itself, the hot air does not form complex vortex or backflow phenomenon in the channel, so that the continuity and effectiveness of heat dissipation are ensured.

[0070] In some embodiments, referring toFigure 17 The inner diameter of the first end to the second end of the flow channel gradually decreases and then increases, so that the flow channel is divided into the gathering section 141, the accelerating section 142 and the buffering section 143 from the first end to the second end, and the inner diameter of the accelerating section 142 is smaller than the inner diameters of the gathering section 141 and the buffering section 143. The first end of the flow channel is close to the air suction device, and the second end of the flow channel is close to the air exhaust device, that is, the inner diameter of the two ends of the flow channel is larger than the inner diameter of the middle part, so that the accelerating section is formed in the middle part of the flow channel. Of course, the inner diameter here can also be the width or length, in short, the cross-sectional area of the channel of the accelerating section is smaller than the cross-sectional areas of the channels of the gathering section and the buffering section.

[0071] In some embodiments, the ratio of the inner diameter of the accelerating section to the inner diameters of the two ends of the flow channel is 0.4-0.6 (preferably 0.5), that is, the two ends of the flow channel gradually shrink inward, so that the cross-sectional area of the middle section (the accelerating section) is reduced to 40%-60% (preferably 50%) of the cross-sectional areas of the two ends.

[0072] In some embodiments, the inner diameters of the two ends of the flow channel, that is, the first end of the gathering section and the first end of the buffering section, are the same as the inner diameters of the second end of the cooling area and the first end of the heat dissipation area, respectively, so that the flow channel smoothly transitions with the cooling area and the heat dissipation area, respectively.

[0073] In some embodiments, the accelerating section is divided into multiple sections and alternately uses the reducing section 1421 and the restoring section 1422, the inner diameter of the reducing section 1421 is smaller than the inner diameter of the restoring section 1422, so that the hot air can avoid the high pressure loss caused by the long channel after entering the accelerating section (a longer channel), thereby ensuring the formation of a sustained negative pressure in the gathering section. In some specific embodiments,

[0074] After the cold air enters the cooling area at the first end of the heat dissipation space and fully exchanges heat with the lamp source, the accelerating effect of the accelerating section quickly guides the hot air to the gathering section under the negative pressure formed in the gathering section, so as to prevent the mixed hot air after heat exchange from mixing with the cold air newly entering the cooling area, thereby reducing the heat dissipation effect and ensuring that the air around the lamp source has a large temperature difference with the lamp source. Then, the hot air gathered in the gathering section enters the accelerating section and is quickly discharged, and then enters the buffering section for temporary storage. On the one hand, this can reduce the escape or conduction of the hot air from the accelerating section to the outside, and on the other hand, this can facilitate the air exhaust device at the second end of the heat dissipation space to exhaust the hot air. Further, due to the difference in inner diameters of the accelerating section and the buffering section, the hot air at the second end of the heat dissipation space can also be effectively prevented from flowing back to the first end, that is, the present application provides a "quick flow guiding anti-backflow heat dissipation structure".

[0075] Herein, the first side 401 (i.e. the front side, the side for user operation), the second side 402, the third side 403 (i.e. the back side) and the fourth side 404 of the shell can be seen in Figure 6 , specifically, the side provided with the detection space is the first side 401, the side provided with the air inlet is the second side 402, the side provided with the air outlet is the third side 403, and the side close to the detection element is the fourth side 404; that is, the first side 401 and the third side 403 are oppositely arranged, and the second side 402 and the fourth side 404 are oppositely arranged.

[0076] In some embodiments, referring to Figure 9 , the two side edges of the partition plate 5 in contact with the bottom wall of the shell extend to both sides of the heat dissipation space to form a hem 51 parallel to the bottom wall, and at least two clamping blocks 44 are arranged on the bottom wall; when the two hems 51 are fixed by the at least two clamping blocks 44 respectively, the hems 51 are attached to the bottom wall. By arranging the hems and clamping blocks on the bottom wall for clamping and fixing, quick disassembly is achieved, and the sealing of the heat dissipation space is further improved by the hems attached to the bottom wall.

[0077] In other embodiments, referring to Figure 11 , the two side edges of the partition plate 5 in contact with the bottom wall of the shell extend to both sides of the heat dissipation space to form a hem parallel to the bottom wall, and at least one through hole is arranged on the hem, and correspondingly, at least one threaded hole corresponding to the through hole is arranged on the bottom wall; when a bolt is passed through the through hole and screwed into the threaded hole, the bolt fixes the partition plate to the bottom wall, and the hem is attached to the bottom wall, that is, the hem is parallel to the bottom wall at this time.

[0078] In some embodiments, referring to Figure 2 , the air inlet is arranged on one of the side walls of the first end of the partition plate, and correspondingly, the air inlet hole 411 is arranged on the second side of the shell 41.

[0079] In other embodiments, referring to Figure 5 , the air inlet is provided with two air inlets, and the two air inlets are respectively located on the top and one of the side walls of the partition plate; correspondingly, the air inlet hole 411 is also provided with two air inlet holes 411, and the two air inlet holes 411 are respectively located on the top and the second side of the shell.

[0080] In some embodiments, the detection space is formed by inwardly recessing the outer surface of the first side of the shell, and a sample detection area corresponding to the opening and a mounting area for mounting a water guide pipe are arranged in the detection space.

[0081] In some embodiments, the sample detection area is provided with a movable window, which is in a closed state during the detection process; the user can check or replace the lamp source located inside the shell by opening the movable window.

[0082] In some embodiments, the partition plate is arranged close to the second side of the shell, and the detection element is arranged close to the fourth side of the shell, so that an isolation space is formed between the detection element and the heat dissipation space.

[0083] In some specific embodiments, the detection box is divided into left and right parts, the lamp source and the sample detection area are located in the left half part, and the partition plate is also arranged in the left half part; and the detection element (such as a sensor, a data acquisition and processing unit, a signal amplifier, etc.) and the water guide pipe are arranged in the right half part, preferably at the rightmost end of the detection box, that is, the end far away from the lamp source, so as to separate the lamp source from other elements, and as much as possible to reduce or avoid the heat generated by the lamp source from being conducted to the detection element and the water guide pipe and other components, thereby causing the problem of inaccurate measurement results or component aging.

[0084] In some embodiments, referring to Figure 10 and Figure 11 , the partition plate (preferably the top part) is provided with heat insulation cotton 12.

[0085] In some embodiments, referring to Figure 14 , the chromatograph further comprises a water guide assembly, the water guide assembly comprises a water guide pipe 9 and a water guide column, the water guide column is arranged in the mounting area, and the water guide pipe 9 is detachably connected with the water guide column.

[0086] In some embodiments, referring to Figure 12 and Figure 13 , the mounting area is provided with a limiting step 433, and the water guide column 8 is provided with a buckle 81, when the buckle 81 is buckled on the limiting step 433, the water guide column 8 is fixed on the shell 41. By detachably arranging the external water guide pipe, the disassembly and assembly of the water guide pipe can be quickly realized.

[0087] In some embodiments, referring to Figure 12 , the mounting area is provided with a plurality of limiting protrusions 434, and the plurality of limiting protrusions 434 cooperatively form a limiting groove for fixing the water guide column 8. By fixing the pipe body part of the water guide column through the limiting groove, the problem of liquid leakage caused by swinging of the water guide column in the detection space can be avoided.

[0088] In some embodiments, referring to Figure 3The detection space is provided with a water guide groove 10, the height of the water guide groove 10 gradually decreases from the first end to the second end, so that the water guide groove 10 forms an inclined drainage slope, and the second end of the water guide groove 10 is provided with a waste liquid outlet 11. By setting the inclined drainage slope, the waste liquid generated during the detection process can be quickly discharged.

[0089] In some embodiments, the infusion device and the column oven are both provided with a water guide column and a water guide pipe, and the specific structure and mounting mode can refer to the water guide pipe and the water guide column in the detection box, which will not be described here; wherein the water guide pipes on the infusion device, the column oven and the detection box are sequentially communicated.

[0090] In some embodiments, the infusion device and the column oven are both provided with a water guide groove, the height of the water guide groove gradually decreases from the first end to the second end, so that the water guide groove forms an inclined drainage slope, and the second end of the water guide groove is provided with a waste liquid outlet.

[0091] In some embodiments, the waste liquid outlet is communicated with the water inlet end of the water guide pipe, that is, the respective waste liquid outlets on the infusion device, the column oven and the detection box are communicated with the water guide pipes provided thereon, and the three water guide pipes are also sequentially communicated.

[0092] In some embodiments, referring to Figures 2-4 The infusion device, the column oven and the detection box are all provided with a magnetic door 45;

[0093] Specifically, the first side of the infusion device and the column oven is respectively provided with a mounting space, a plurality of first magnetic elements 413 are arranged on the mounting space, the infusion device and the column oven further include a magnetic door 45, and a plurality of second magnetic elements 451 corresponding to the first magnetic elements 413 are arranged on the magnetic door 45; when the magnetic door 45 is mounted on the infusion device and / or the column oven through the second magnetic elements 451 and the first magnetic elements 413, the magnetic door 45 and the mounting space enclose a sealed space, and the water guide pipes of the infusion device and the column oven are located in the sealed space.

[0094] A plurality of first magnetic elements 413 are arranged on the detection space; the detection box further includes a magnetic door 45, and a plurality of second magnetic elements 451 corresponding to the first magnetic elements 413 are arranged on the magnetic door 45; when the magnetic door 45 is mounted on the shell through the second magnetic elements 451 and the first magnetic elements 413, the shell and the magnetic door 45 enclose the sealed detection space. That is, the magnetic door 45 plugs the opening of the detection space, so that the detection space is a sealed space.

[0095] In some embodiments, the first magnetic element 413 and the second magnetic element 451 are both magnets.

[0096] In summary, the application provides a heat dissipation scheme that limits heat to a limited area and quickly leads heat out through a "straight-flow" convection air duct. Specifically, the scheme sets a "straight-flow" partitioned isolation heat dissipation channel, synchronously introduces cold air into the heat dissipation space through the air suction device and the air exhaust device, and exhausts hot air from the heat dissipation space, so that the air in the heat dissipation space is quickly drained from the first end to the second end for discharge, realizing the rapid concentrated heat dissipation of the light source. On the one hand, a large amount of heat generated by the light source can be concentrated in the heat dissipation space, thereby preventing the heat from spreading to the detection element or the water pipe area to cause adverse effects; on the other hand, the drainage channel can buffer the heat, that is, the heat generated by the light source can be quickly dispersed into the drainage channel, thereby preventing the problem of high temperature of the light source. Further, the "straight-flow" air duct design can make the airflow path clear, thereby efficiently leading the heat out of the channel and avoiding the accumulation of heat in the channel.

[0097] Embodiment Two

[0098] This embodiment is basically as shown in Figure 15 、 Figures 19-22

[0099] Referring to Figure 15 , the embodiment provides a column oven for a liquid chromatograph, which comprises a shell 300, a heating device and a refrigerating device arranged inside the shell 300, a heat-conducting part 301 arranged on a first side of the shell 300, the heating device in surface contact with the heat-conducting part 301, a mounting piece 302 in the shape of a trapezoid arranged on a second surface of the heat-conducting part 301, a plurality of mounting grooves with different lengths arranged transversely on the mounting piece 302, the mounting grooves being in the shape of an arc in cross section, the mounting grooves penetrating through the mounting piece, and fixing clamps arranged at both ends of the mounting grooves respectively; when a chromatographic column 303 is fixed by being mounted on the fixing clamps, the middle part of the chromatographic column 303 is wrapped in the mounting grooves, and both ends of the chromatographic column 303 are suspended outside the mounting grooves.

[0100] By arranging the mounting grooves with different lengths, chromatographic columns with different lengths can be correspondingly mounted, and the mounting grooves are arranged in the shape of a trapezoid (in hierarchical arrangement), so that no matter which mounting groove the chromatographic column is mounted in, at least one side of the mounting groove can be ensured to have enough operation space, for example, the end of the second mounting groove from top to bottom, that is, the upper side of both sides of the two fixing clamps of the mounting groove is not blocked, thereby facilitating the user to operate.

[0101] ​Further, the fixing clips are arranged at both ends of the mounting groove, which is easy to replace and can automatically connect the chromatographic column with the mounting groove without repeated adjustment.

[0102] In some embodiments, the housing is internally provided with a heat-conducting space, the column oven further comprises a heating device and a refrigeration device arranged in the heat-conducting space, and one side of the housing is provided with a mounting space for mounting the chromatographic column, which corresponds to the heating part.

[0103] In some embodiments, referring to Figure 22 The heating device comprises a plurality of heating pipes 305 arranged in the heat-conducting part 301 or closely arranged on the heat-conducting part 301, the number of the heating pipes 305 is the same as the number of the mounting grooves (preferably 4 / each), and the plurality of heating pipes 305 correspond to the plurality of mounting grooves one by one; so that the heat conduction between the heat-conducting pipes and the chromatographic column 303 is more uniform and direct, in other words, the heat of the heat-conducting pipes can be first "directed" to the chromatographic column 303 through the heat-conducting part 301 to achieve heating, without being indiscriminately conducted to each part of the heat-conducting panel as in the prior art, thereby achieving the purpose of saving heat source.

[0104] In some embodiments, the refrigeration device and the heat-conducting part 301 are installed in an intermittent contact manner, when the cold end 307 of the refrigeration device contacts the heat-conducting part 301, the chromatographic column 303 can be cooled through the heat-conducting part 301, and when the refrigeration device leaves the first surface of the heat-conducting part 301, the chromatographic column 303 is no longer cooled by the refrigeration device.

[0105] In some specific embodiments, the refrigeration device comprises a cold end 307, a refrigeration sheet 312, an elastic member 308 and a pull rod motor 309 connected in sequence, wherein the output end of the pull rod motor 309 is connected with the refrigeration sheet 312 through the elastic member 308, the refrigeration sheet 312 is surface-mounted with the cold end 307, and the cold end 307 corresponds to but does not contact the heat-conducting part 301.

[0106] When the output end of the pull rod motor 309 is elongated, the output end of the pull rod motor 309 drives the refrigeration sheet 312 and the cold end 307 to move towards the heat-conducting part 301, so that the cold end 307 closely contacts the heat-conducting part 301, and the elastic member 308 is compressed, the heat generated by the refrigeration sheet 312 is conducted to the heat-conducting part 301 through the cold end 307, and then to the mounting part and the chromatographic column 303.

[0107] When the output end of the pull rod motor 309 is retracted, the elastic member 308 is reset, driving the cooling fin 312 and the cold end 307 to reset, and further making the cold end 307 no longer in contact with the heat conduction part 301.

[0108] Thus, in the heating process, the refrigeration device is kept in the closed state, and the heat generated by the heating pipe 305 will not be conducted to the refrigeration device to cause heat loss, and when only refrigeration is needed, the cold end 307 is in contact with the heat conduction part 301 to achieve refrigeration, that is, the refrigeration device and the heating device in the present application are independently arranged and work independently, and do not interfere with each other.

[0109] In some embodiments, the refrigeration device further comprises heat dissipation fins 310 arranged on both sides of the cooling fin 312, and correspondingly, the shell is provided with heat dissipation fans 311 corresponding to the heat dissipation fins 310.

[0110] In some embodiments, the heat conduction part 301 is provided with a temperature sensor 306.

[0111] In some embodiments, the lengths of the mounting grooves increase successively from top to bottom.

[0112] In some embodiments, the mounting member is in the shape of an isosceles trapezoid, and the connecting lines of the center points of the mounting grooves are parallel to the height direction of the chromatograph.

[0113] In some embodiments, referring to Figure 21 , the fixing clamp comprises a connecting part connected with the mounting member, and upper and lower clamping pieces 341 and 342 symmetrically arranged on both sides of the connecting part, the connecting part, the upper clamping piece 341 and the lower clamping piece 342 form a clamping space 344, the upper clamping piece 341 and the lower clamping piece 342 can be deformed under external force, and the connecting part cannot be deformed.

[0114] In some embodiments, the upper clamping piece 341 and the lower clamping piece 342 extend outward at one end away from the connecting part to form a guide space 343 with gradually increasing height;

[0115] When the chromatographic column enters the clamping space 344 along the guide space 343, the upper clamping piece 341 and the lower clamping piece 342 are deformed outward respectively, so that the clamping space 344 becomes larger, and when the chromatographic column completely enters the clamping space 344, the upper clamping piece 341 and the lower clamping piece 342 are reset to clamp the chromatographic column.

[0116] The connecting portion comprises a base body arranged along a vertical direction, the base body gradually contracts inwardly so that the height of the connecting portion gradually decreases from the first end to the second end, the upper clamping piece and the lower clamping piece are connected with the second end of the connecting portion, the clamping space is circular or elliptical with two open sides, and the diameter of the clamping space is greater than the height of the second end of the connecting portion, and the guide space is horn-shaped and opens outwardly relative to the clamping space.

[0117] The present application sets the guide space with a guiding function, so that the user only needs to roughly align the chromatographic column with the clamping space during the process of pushing the chromatographic column into the clamping space, and the chromatographic column can automatically enter the clamping space and be clamped under the guiding action of the guide space.

[0118] In some embodiments, referring to Figure 19 , the column oven further comprises a water guide assembly arranged along the height direction of the column oven, the water guide assembly comprises a water guide column 8 and a flexible water guide pipe 9, the first end of the water guide column 8 is provided with a water guide cavity, the bottom of the water guide cavity is opened and extends downwardly to form a water guide channel penetrating through the water guide column, and the first end of the water guide pipe is detachably connected with the second end of the water guide column, so that the water guide pipe communicates with the water guide channel.

[0119] In some embodiments, a water guide groove communicating with the water guide cavity is arranged on the detection box, so that the waste liquid generated in the detection box can be drained into the water guide cavity through the water guide groove and flow out through the water guide channel and the water guide pipe.

[0120] The external water guide pipe is arranged in a detachable manner, so that the disassembly and assembly of the water guide pipe can be quickly realized.

[0121] In summary, the present application comprehensively provides a layered fixed-point heating column oven with face contact, which can meet the installation and heating needs of chromatographic columns of different lengths, is simple and convenient to use, and has high heating efficiency.

[0122] Embodiment three

[0123] This embodiment is basically as shown in Figures 12-14 and Figure 19 :

[0124] The present application provides a liquid drainage system for a liquid chromatograph, the chromatograph comprising a tray, a liquid delivery device, a column oven and a detection box arranged in sequence from top to bottom, and the specific structure of the chromatograph can refer to the chromatograph structure in embodiment one.

[0125] The liquid drainage system comprises three water guide assemblies connected in sequence along the height direction of the chromatograph, and the three water guide assemblies are arranged on the liquid delivery device, the column oven and the detection box, respectively; the three water guide assemblies adopt the same structure.

[0126] Specifically, the water guide assembly comprises a water guide column 8 and a flexible water guide pipe 9 (for example, a rubber hose), a first end of the water guide column 8 is provided with a water guide cavity 82, a bottom of the water guide cavity 82 is opened and extends downward to form a water guide channel 83 penetrating through the water guide column 8, and a first end of the water guide pipe 9 is detachably connected with a second end of the water guide column 8, so that the water guide pipe 9 communicates with the water guide channel 83; wherein the second end of the water guide column 8 refers to one end of the water guide cavity 82.

[0127] Three water guide columns 8 are respectively fixed (including a detachable fixing mode) on the infusion device, the column oven and the detection box, a second end of the water guide pipe 9 on the infusion device is docked with the water guide cavity 82 on the column oven, and a second end of the water guide pipe 9 on the column oven is docked with the water guide cavity 82 on the detection box. That is to say, the water guide pipe 9 and the water guide column 8 of the same water guide assembly are detachably connected and internally communicate to form a waste liquid channel, and adjacent water guide assemblies are also communicated with each other, so that the water guide assemblies on the infusion device, the column oven and the detection box are sequentially communicated to form a complete waste liquid drainage system.

[0128] In some embodiments, the infusion device, the column oven and the detection box are respectively provided with a water guide groove in communication with the water guide cavity 82; so that the waste liquid generated in the infusion device, the column oven and the detection box can be drained into the water guide cavity 82 through the water guide groove and then flow out through the water guide channel 83 and the water guide pipe 9.

[0129] In some embodiments, the diameter of the water guide cavity 82 is greater than the diameter of the pipeline, and when the second end of the pipeline is docked with the water guide cavity 82, a certain space is still left between the water guide cavity 82 and the pipeline, thereby facilitating the waste liquid in the water guide groove to enter the water guide cavity 82.

[0130] In some embodiments, the height of the water guide groove gradually decreases from the first end to the second end to form an inclined slope, and the second end of the water guide groove communicates with the water guide cavity 82.

[0131] In some embodiments, the infusion device, the column oven and the detection box are respectively provided with a recess 436 for accommodating the water guide cavity 82, and a limiting step 433 is arranged at the bottom of the recess 436; the water guide cavity 82 is located in the recess 436, the bottom of the water guide cavity 82 abuts against the limiting step 433, and the second end of the water guide column 8 extends out of the recess 436 and is located below the recess 436.

[0132] In some embodiments, the bottom of the water guide column 8 is provided with a buckle 81 which forms a clamping groove with the bottom of the water guide groove, and the limiting step 433 is located in the clamping groove. That is, the water guide column 8 can be fixed in the water guide groove by clamping, and at this time, the clamping groove can limit the vertical position of the water guide column 8, and the water guide groove can limit the horizontal position of the water guide column 8.

[0133] In some embodiments, at least two limiting protrusions 434 are arranged on the infusion device, the column temperature box and the detection box respectively, and the two limiting protrusions 434 cooperate to form a limiting groove for limiting the horizontal position of the water guide pipe 9. When the water guide pipe 9 is installed in the limiting groove, the two limiting protrusions 434 are located on the two sides of the water guide pipe 9 respectively, so as to prevent the water guide pipe 9 from moving horizontally.

[0134] In some embodiments, the bottom of the water guide cavity 82 extends downward to form a transition section 84 and a connecting section 85 in sequence, the diameter of the transition section 84 is greater than the diameter of the connecting section 85, and the water guide pipe 9 is sleeved on the connecting section 85. By arranging the transition section 84, the stability of the water guide column 8 can be improved.

[0135] In some embodiments, limiting holes are arranged on the infusion device, the column temperature box and the detection box respectively, the limiting holes are located below the grooves 436, and the second end of the water guide column 8 extends out of and below the limiting holes. By arranging the limiting holes, the water guide column 8 can be double-limited at different heights, so as to further prevent the water guide column 8 from swinging horizontally.

[0136] In some embodiments, at least two limiting protrusions 434 are arranged staggered along the height direction of the liquid chromatograph and are located on the two sides of the water guide pipe 9 respectively, so that the two sides of the water guide pipe 9 form grooves 435. For example, two limiting protrusions 434 are arranged on the two sides of the water guide pipe 9 respectively, the limiting protrusions 434 located on one side form a first groove 435, the limiting protrusions 434 located on the opposite side form a second groove 435, and the heights of the first groove 435 and the second groove 435 are different, that is, the limiting protrusions 434 on the two sides are arranged staggered, and the two grooves 435 are also arranged staggered, so as to facilitate the user to pinch at least one side of the water guide pipe 9 from the clamping groove part and take out the water guide pipe 9 from the limiting groove.

[0137] In some embodiments, the second end of the connecting section 85 extends downward and the outer diameter gradually decreases to form a guide slope. So as to facilitate the insertion of the water guide pipe 9 into the second end of the water guide column 8 along the guide slope.

[0138] In summary, the application provides an external split liquid drainage pipeline design with multiple limiting structures. Specifically, the water guide pipe is connected to the water guide column in a single-sided fixed manner and is limited by multiple limiting structures. This design ensures the stability of the liquid drainage system and facilitates the quick disassembly and assembly of the water guide pipe.

[0139] Firstly, the water guide column in the liquid drainage system is fixed on the chromatograph, one end of the water guide pipe is sleeved on one end of the water guide column, and the other end is connected to the water guide cavity but not fixed. That is, the water guide pipe is installed in a single-sided fixed manner. On the one hand, it is convenient to replace the water guide pipe. On the other hand, the water guide column is fixed on the chromatographic column, and the water guide pipe can be automatically aligned through the water guide column after replacing the water guide pipe.

[0140] Further, the application sets multiple limiting structures on the chromatograph, such as limiting steps and limiting holes, which can limit the water guide column horizontally. The limiting groove can limit the water guide pipe horizontally, which can ensure that the water guide column and the water guide pipe always maintain a corresponding state, thereby ensuring the stability of the liquid drainage system.

[0141] Further, by setting an inclined drainage slope, it can ensure that the waste liquid generated during the detection process can flow into the open water guide cavity and be quickly discharged.

[0142] Example Four

[0143] In the prior art, the heat dissipation mode of the chromatograph is to set an air extraction device on the side wall of the detection box to extract the hot air distributed in the detection box, thereby achieving heat dissipation. For example, the Chinese utility model patent with application number 202120699737.2 discloses an ion chromatograph. In this patent, the light source (usually refers to deuterium lamp and tungsten lamp, i.e. heat source) is exposed to the entire cavity of the detection box. A large amount of heat generated by the light source will be quickly distributed to the entire cavity. In the case of low ambient temperature such as cold storage, even if the heat is distributed to the inside of the cavity, the heat in the cavity exchanges with the cold air in the environment, and the air extraction device arranged on the side wall of the detection box can basically achieve the cooling of the cavity. However, this method at least has the following defects: for example, the heat generated by the light source is distributed to the entire cavity of the detection box without distinction. After the detection elements in the cavity are heated, it is extremely likely that the measurement results will be inaccurate. For another example, if some elements in the detection box (such as the water guide pipe in the detection cavity) are exposed to a high-temperature environment for a long time, it will inevitably accelerate the aging of the elements.

[0144] In addition, if the ambient temperature is high (for example, in a general laboratory, especially in the case of summer power cuts, the air conditioner temperature cannot be adjusted too low, at this time the indoor temperature is about 20-25°), at this time if a large amount of heat is stored inside the cavity, and the heat exchange speed between the heat in the cavity and the air in the environment is slow, at this time the air exhaust device arranged on the side wall of the detection box is difficult to realize the rapid cooling of the cavity.

[0145] Based on the above background, the present embodiment provides a detection box of a liquid chromatograph, referring to Figure 1 and Figure 10 , the detection box comprises a shell 41, and a lamp source 46 and a detection element 42 arranged inside the shell 41;

[0146] Further comprising a partition plate 12 detachably arranged inside the shell 41, the partition plate 12 and the bottom wall of the shell 41, the side wall of the first side of the shell 41 form a closed heat dissipation space enclosing around the lamp source 46, the heat dissipation space extends along the first side to the third side of the shell; That is, the heat dissipation space is a straight channel, and the hot air in the heat dissipation space can be directly discharged from the first end to the second end, and the heat dissipation efficiency is high.

[0147] Referring to Figure 16 , the heat dissipation space is divided into a cooling area 13, a drainage channel 14 and a heat dissipation area 15 from the first end to the second end, at least one side wall of the cooling area 13 is provided with an air inlet 52, the air inlet 52 is provided with a suction device 6, the lamp source 46 is arranged in the cooling area 13 and corresponds to the suction device 6; The heat dissipation area 15 is provided with an air outlet 53 corresponding to the third side of the shell 41, and the air outlet 53 is provided with an exhaust device 7; Correspondingly, referring to Figure 5 , the shell is respectively provided with at least one air inlet hole 411 corresponding to the suction device, and an air outlet hole 412 corresponding to the exhaust device. That is, the air inlet is arranged on the side wall of the shell, and the air outlet is arranged on the back side of the shell, which does not affect the operation of the user; That is, the air inlet and the air outlet are located at both ends of the heat dissipation space, and the heat dissipation space penetrates through the entire inside of the shell.

[0148] In some embodiments, the air inlet is provided with two, and the two air inlets are respectively located at the top and the second side of the partition plate.

[0149] In some embodiments, referring to Figure 11The partition plate is an n-shaped partition plate, both ends of the n-shaped partition plate are open, and a mounting plate 54 is arranged at the opening of the second end of the partition plate. The exhaust device is arranged on the mounting plate 54. When the partition plate 5 and the mounting plate 54 are installed in the shell 41, the partition plate 5, the mounting plate 54 and the bottom wall and the first side wall of the shell 41 enclose a heat dissipation space.

[0150] In some embodiments, the air suction device and the air exhaust device are both fans (preferably silent fans).

[0151] The present application corresponds the lamp source (i.e. heat source) to the cooling area, the cold air sucked by the air suction device is directly blown to the lamp source, which can directly and quickly cool the lamp source. The hot air generated by the heat exchange of the cold air blown to the lamp source enters the drainage channel for buffering, and then is extracted by the air exhaust device arranged at the rear side of the detection box. On the one hand, the air flow path is clear, and the heat can be efficiently taken out of the channel, avoiding the accumulation of heat in the channel. Moreover, due to the design of the acceleration section of the channel and the straight and hollow structure of the channel itself, the hot air will not form complex vortex or backflow phenomenon in the channel, thereby ensuring the continuity and effectiveness of heat dissipation.

[0152] In some embodiments, referring to Figure 17 , the inner diameter of the drainage channel gradually decreases from the first end to the second end and then gradually increases, so that the drainage channel is divided into an aggregation section 141, an acceleration section 142 and a buffering section 143 from the first end to the second end. The inner diameter of the acceleration section 142 is smaller than the inner diameters of the aggregation section 141 and the buffering section 143. The first end of the drainage channel is close to the air suction device, and the second end of the drainage channel is close to the air exhaust device, that is, the inner diameters of both ends of the drainage channel are greater than the inner diameter of the middle part, so that an acceleration section is formed in the middle part of the drainage channel. Of course, the inner diameter here can also be the width or length. In short, the cross-sectional area of the channel of the acceleration section is smaller than the cross-sectional areas of the channels of the aggregation section and the buffering section.

[0153] In other words, in some embodiments, the inner diameter of the gathering section gradually decreases from the first end to the second end, and the inner diameter of the buffer section gradually increases from the first end to the second end, so that the flow channel is similar to an X shape. That is, the diameter of the middle part of the flow channel is small, and the two ends extend to both sides and gradually increase in inner diameter, so that the flow channel is similar to an X shape, but not exactly an X shape, and the middle part is not closed. The gathering section and the buffer section can be a value of a slope or an arc surface. Of course, the inner diameter here can also be the width or the length. In any case, the cross-sectional area of the channel of the acceleration section is smaller than the cross-sectional area of the channel of the gathering section and the buffer section. The first end of the flow channel is close to the air suction device, and the second end of the flow channel is close to the air exhaust device.

[0154] In some embodiments, the ratio of the inner diameter of the acceleration section to the inner diameter of the two ends of the flow channel is 0.4-0.6 (preferably 0.5). That is, the two ends of the flow channel gradually shrink inward, so that the cross-sectional area of the middle section (the acceleration section) is reduced to 40%-60% (preferably 50%) of the cross-sectional area of the two ends.

[0155] In some embodiments, the inner diameter of the two ends of the flow channel, i.e., the first end of the gathering section and the first end of the buffer section, is the same as the inner diameter of the second end of the cooling area and the first end of the heat dissipation area, so that the flow channel smoothly transitions with the cooling area and the heat dissipation area, respectively.

[0156] In some embodiments, the acceleration section is divided into multiple sections, and the narrowing section 1421 and the recovery section 1422 are used alternately. The inner diameter of the narrowing section 1421 is smaller than the inner diameter of the recovery section 1422, so that after the hot air enters the acceleration section (a longer channel), the high pressure loss caused by the long channel can be avoided, thereby ensuring that a continuous negative pressure is formed in the gathering section.

[0157] In some specific embodiments, after the cold air enters the cooling area at the first end of the heat dissipation space and fully exchanges heat with the light source, the hot air is quickly guided to the gathering section by the negative pressure formed in the gathering section under the acceleration of the acceleration section, so as to prevent the mixed hot air after heat exchange from mixing with the cold air newly entering the cooling area, thereby reducing the heat dissipation effect and ensuring that the air around the light source has a large temperature difference with the light source. Then, the hot air gathered in the gathering section enters the acceleration section and then enters the buffer section and is discharged. On the one hand, this can reduce the escape or conduction of the hot air from the acceleration section to the outside. On the other hand, this can facilitate the air exhaust device located at the second end of the heat dissipation space to discharge the hot air. Furthermore, due to the difference in inner diameter between the acceleration section and the buffer section, the hot air at the second end of the heat dissipation space can also be effectively prevented from flowing back to the first end. That is, the present application provides a "quick flow guide and anti-backflow heat dissipation structure".

[0158] In some embodiments, the partition plate is arranged close to the second side of the shell, and the detection element is arranged close to the fourth side of the shell, so that an isolation space is formed between the detection element and the heat dissipation space.

[0159] In some specific embodiments, the detection box is divided into left and right parts, the light source and the sample detection area are located in the left half part, and the partition plate is also arranged in the left half part; and the detection element (such as a sensor, a data acquisition and processing unit, a signal amplifier, etc.) and the water guide pipe are arranged in the right half part, preferably at the rightmost end of the detection box, i.e. away from the light source, so as to separate the light source from other elements, and to reduce or avoid the heat generated by the light source from being conducted to the detection element and the water guide pipe and other components, thereby avoiding the problem of inaccurate measurement results or component aging.

[0160] In some embodiments, referring to Figure 9 , the two side edges of the partition plate 5 in contact with the bottom wall of the shell extend to both sides of the heat dissipation space to form a hem 51 parallel to the bottom wall, and at least two clamping blocks 44 are arranged on the bottom wall; when the two hems 51 are fixed by the at least two clamping blocks 44 respectively, the hems 51 are attached to the bottom wall. By arranging the hems and the clamping blocks on the bottom wall for clamping and fixing, quick disassembly and assembly can be achieved, and the sealing performance of the heat dissipation space can be further improved by attaching the hems to the bottom wall.

[0161] In other embodiments, referring to Figure 11 , the two side edges of the partition plate 5 in contact with the bottom wall of the shell extend to both sides of the heat dissipation space to form a hem parallel to the bottom wall, and at least one through hole is arranged on the hem; correspondingly, at least one threaded hole corresponding to the through hole is arranged on the bottom wall; when a bolt is passed through the through hole and screwed into the threaded hole, the bolt fixes the partition plate on the bottom wall, and the hem is attached to the bottom wall, i.e. the hem is parallel to the bottom wall at this time.

[0162] In some embodiments, a first end of the partition plate is provided with an opening corresponding to the first side of the shell;

[0163] A detection space is arranged outside the shell, and the detection space is located at the first side of the shell; the detection space includes a sample detection area and a mounting area; the sample detection area is provided with an inspection window corresponding to the opening; and the mounting area is detachably provided with a water guide pipe.

[0164] In some embodiments, a plurality of first magnetic elements are arranged on the shell; and the detection box further includes a magnetic suction door provided with a plurality of second magnetic elements corresponding to the first magnetic elements.

[0165] When the magnetic door is installed on the shell through the second magnetic element and the first magnetic element, the shell and the magnetic door enclose the detection space. By setting the magnetic door, the airtightness of the detection space can be greatly improved compared with the traditional hinged door.

[0166] In summary, the present application provides a fixed-point heat dissipation scheme that limits a large amount of heat generated by a lamp source to a limited area and quickly leads the heat out through a set guide path, i.e., a "direct current type" convection air duct.

[0167] Specifically, the present scheme synchronously introduces cold air into the heat dissipation space and exhausts hot air from the heat dissipation space by setting a heat dissipation space extending along the first side to the third side of the shell and cooperating with the air suction device and the air exhaust device respectively located on both sides of the heat dissipation space, so that the air inside the heat dissipation space is quickly drained from the first end to the second end for discharge, realizing the rapid concentrated heat dissipation of the lamp source. On the one hand, a large amount of heat generated by the lamp source can be concentrated in the heat dissipation space, thereby preventing the heat from spreading outside the heat dissipation space and adversely affecting the detection elements in the shell or the area where the water guide pipe is located on the shell. On the other hand, the drainage channel can buffer the heat, i.e., the heat generated by the lamp source can be quickly dispersed into the drainage channel, thereby preventing the problem of excessively high temperature of the lamp source. The "direct current type" air duct design can make the airflow path clear, thereby efficiently leading the heat out of the channel and avoiding the accumulation of heat in the channel.

[0168] Further, based on the long drainage channel (i.e., penetrating through the entire shell), the present application divides the drainage channel into multiple functional zones with different inner diameters. During the working process of the chromatograph, the cold air enters the first end of the heat dissipation space into the cooling zone and fully exchanges heat with the lamp source. The acceleration of the acceleration section causes the accumulation section to form a negative pressure, thereby quickly leading the hot air to the accumulation section for accumulation, so as to prevent the mixed hot air after heat exchange from mixing with the cold air newly entering the cooling zone, thereby reducing the heat dissipation effect and ensuring that the air around the lamp source has a large temperature difference with the lamp source. The hot air accumulated in the accumulation section is then quickly discharged to the buffer section through the acceleration section, and then discharged under the action of the exhaust device. On the one hand, it can reduce the escape or conduction of hot air from the acceleration section to the cavity (i.e., other areas outside the heat dissipation space in the shell). On the other hand, it can facilitate the exhaust device at the second end of the heat dissipation space to discharge the hot air. Further, due to the difference in inner diameters of the acceleration section and the buffer section, the hot air at the second end of the heat dissipation space can also be effectively prevented from flowing back to the first end. That is, the present application also provides a "quick drainage anti-backflow heat dissipation structure".

[0169] It is to be understood that the terminology "including", "comprising", or any other variation thereof, is intended to cover a non-exclusive inclusion such that processes, methods, articles, or apparatuses that comprise a list of elements are not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses. Without further limitation, an element preceded by "comprises a" does not, without more limitations, foreclose the existence of additional identical elements in the process, method, article, or apparatus that includes the recited element.

[0170] The embodiments of the present application are described above in conjunction with the drawings, but the present application is not limited to the specific embodiments described above, and the specific embodiments described above are merely illustrative rather than restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope of protection of the claims, which are all within the protection of the present application.

Claims

1. A detection box of a liquid chromatograph, characterized by, The detection box comprises a shell, a lamp source and a detection element arranged inside the shell; Further comprising a partition plate arranged inside the shell, the partition plate and the bottom wall of the shell and the side wall of the first side of the shell form a closed heat dissipation space around the lamp source, the heat dissipation space extends along the first side to the third side of the shell; The heat dissipation space is divided into a cooling area, a flow channel and a heat dissipation area from the first end to the second end, at least one side wall of the cooling area is provided with an air inlet, the air inlet is provided with a suction device, the lamp source is arranged in the cooling area and corresponds to the suction device; the heat dissipation area is provided with an air outlet corresponding to the third side of the shell, and the air outlet is provided with an exhaust device; accordingly, the shell is provided with at least one air inlet hole corresponding to the suction device and an air outlet hole corresponding to the exhaust device.

2. The detection box of a liquid chromatograph according to claim 1, characterized in that, The flow channel is divided into an accumulation section, an acceleration section and a buffer section from the first end to the second end, and the inner diameter of the acceleration section is smaller than the inner diameters of the accumulation section and the buffer section.

3. The detection box of a liquid chromatograph according to claim 2, characterized in that, The acceleration section comprises a plurality of narrowing sections and a plurality of recovery sections arranged alternately, and the inner diameter of the narrowing section is smaller than the inner diameter of the recovery section.

4. The detection box of a liquid chromatograph according to claim 2, wherein, The inner diameter of the acceleration section is 40%-60% of the inner diameters of the cooling area and / or the heat dissipation area.

5. The detection box of a liquid chromatograph according to claim 2, wherein, The inner diameter of the accumulation section gradually decreases from the first end to the second end, and the inner diameter of the buffer section gradually increases from the first end to the second end, so that the flow channel is X-shaped.

6. The detection box of a liquid chromatograph according to claim 1, wherein, The partition plate is arranged close to the second side of the shell, and the detection element is arranged close to the fourth side of the shell, so that an isolation space is formed between the detection element and the heat dissipation space.

7. The detection box of a liquid chromatograph according to claim 6, wherein, The air inlet is provided with two air inlets, and the two air inlets are respectively located on the top and the second side of the partition plate.

8. The detection box of a liquid chromatograph according to claim 1, characterized in that, The two side edges of the partition plate in contact with the bottom wall of the shell extend to both sides of the heat dissipation space to form a hem parallel to the bottom wall, and the bottom wall is provided with at least two clamping blocks; When the two hems are fixed by the at least two clamping blocks respectively, the hems are attached to the bottom wall.

9. The detection box of a liquid chromatograph according to claim 1, wherein, The first end of the partition plate is provided with an opening corresponding to the first side of the shell; The shell is provided with a detection space outside, the detection space is located on the first side of the shell, the detection space comprises a sample detection area and a mounting area, the sample detection area is provided with an inspection window corresponding to the opening, and the mounting area is detachably provided with a water guide pipe.

10. The detection box of a liquid chromatograph according to claim 9, wherein, The shell is provided with a plurality of first magnetic elements; the detection box further comprises a magnetic door, and the magnetic door is provided with a plurality of second magnetic elements corresponding to the first magnetic elements; When the magnetic door is installed on the shell through the second magnetic elements and the first magnetic elements, the shell and the magnetic door form a closed detection space.

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