Novel biological experiment chromatography cabinet

Abstract

The utility model discloses a novel biological experiment chromatography cabinet which comprises a chromatography cabinet main body, an upper air curtain unit, a lower air curtain unit, an internal and external circulation cooling and dehumidifying system and an embedded control panel. Wherein the upper and lower air curtain unit can automatically start an upper air curtain / upper and lower air curtains according to the condition of closing / opening a chromatography cabinet door, and the air volume of the air curtains can also be adjusted; the internal and external circulation cooling and dehumidification system can keep the humidity in the chromatography cabinet not to exceed a set value all the time. Therefore, the service life of the chromatography cabinet and the service life of chromatography equipment in the chromatography cabinet can be effectively prolonged, the safety of experiment operators is guaranteed, and the effects of saving energy and reducing cost are achieved. Meanwhile, due to the design that the control panel is embedded in the glass cabinet door of the chromatography cabinet, the whole chromatography cabinet looks more attractive and elegant and is rich in modern atmosphere. The low-temperature refrigerator not only can provide low-temperature conditions for various chromatographic devices to prepare protein / peptide / carbohydrate substances, but also can be used as a constant-temperature refrigerator for storing various biological substances at low temperature.

Description

Technical Field

[0001] This utility model relates to the field of biological material preparation and storage, and more specifically, it is a special device with a longer service life, greater energy efficiency and environmental friendliness, safety and friendliness to experimental operators, and applicability to the preparation and storage of various biological materials. Background Technology

[0002] A chromatography cabinet is a special-purpose low-temperature cabinet designed specifically for biochemical chromatography experiments. It can also be used for other experiments that require a low-temperature environment or for refrigerating items.

[0003] Currently, after a period of use, various biological laboratory chromatography cabinets sold on the market typically develop a large amount of condensation on their glass doors. This not only obstructs the view of the laboratory personnel outside the cabinet, but also, over time, the condensation accumulates and falls to the bottom of the cabinet, creating puddles that could easily cause personnel to slip and fall, posing a safety hazard. Furthermore, the metal components at the bottom of the cabinet door often develop paint peeling and rust after a period of use, affecting the cabinet's appearance and potentially leading to its failure.

[0004] To achieve energy savings, existing biological chromatography cabinets typically employ an internal circulation cooling system. This involves repeatedly circulating the existing cool air within the cabinet, allowing the compressor to compensate for cooling losses during experiments with only a small amount of condensate. However, if the gases inside the chromatography cabinet are irritating or corrosive, their intake into the circulating cooling system can corrode and damage the internal piping, reducing the cabinet's lifespan. Furthermore, prolonged exposure of the various chromatography instruments to such an environment will significantly shorten their lifespan.

[0005] In addition, although the internal circulation cooling system used in existing biological laboratory chromatography cabinets may have an energy-saving effect to some extent, the moisture evaporated in biochemical chromatography experiments cannot be effectively discharged. Therefore, after a period of operation, the inside of the existing biological laboratory chromatography cabinets often becomes damp, which will also reduce the service life of the chromatography cabinet and chromatography equipment.

[0006] Furthermore, when operating / maintaining the chromatography equipment, existing biological laboratory chromatography cabinets often have their glass doors open for extended periods, easily allowing hot outside air to enter the cabinet and affecting the stability of the internal temperature. This makes it difficult to achieve energy-saving and environmentally friendly effects. Utility Model Content

[0007] The purpose of this invention is to provide a novel biological laboratory chromatography cabinet to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A novel biological laboratory chromatography cabinet includes a chromatography cabinet body, upper and lower air curtain units and an internal and external circulation cooling and dehumidification system disposed on the chromatography cabinet body. The upper air curtain unit includes an upper air curtain unit air inlet (1), an upper air curtain unit air outlet (2) and an upper air curtain unit fan (29); the lower air curtain unit includes a lower air curtain unit air outlet (5), a lower air curtain unit air inlet (6) and a lower air curtain unit fan (42); the upper and lower air curtain units are respectively disposed on the front side of the glass cabinet door of the chromatography cabinet body; the air inlet (1) of the upper air curtain unit blows downward and the air outlet (5) of the lower air curtain unit blows upward.

[0010] As a further embodiment of this utility model, it also includes an infrared sensor (36) disposed on the inside of the glass cabinet door, wherein the infrared sensor (36) is linked with the upper and lower air curtain units.

[0011] As a further embodiment of this utility model: the main body of the chromatography cabinet includes a chromatography cabinet body (10), the front of the chromatography cabinet body (10) is provided with a left glass cabinet door (4) and a right glass cabinet door (12); the chromatography cabinet body (10) is provided with an internal power strip (13) and an internal temperature and humidity monitoring probe (14); the right side of the chromatography cabinet body (10) near the upper end is provided with an external temperature monitoring probe (7); the main body of the chromatography cabinet also includes an embedded control panel (8), and a device switch (9) is provided next to the embedded control panel (8); the embedded control panel (8) and the device switch (9) are respectively embedded in the left glass cabinet door (4) or the right glass cabinet door (12).

[0012] As a further embodiment of this utility model: the chromatography cabinet (10) is equipped with a volatile organic compound probe (17).

[0013] As a further embodiment of this utility model: the embedded control panel (8) is a touch screen, including a "airflow" column, a "temperature" column, a "humidity" column, a "top and bottom air curtain unit" menu, a "internal and external circulation cooling and dehumidification system" menu, a "frequency conversion" menu, two "start" menus, two "stop" menus, a "confirm" menu, a "modify" menu, and a series of digital menus (0,1,2,3,4,5,6,7,8,9).

[0014] As a further embodiment of this utility model: the internal and external circulation cooling and dehumidification system includes an air inlet (19) inside the cabinet, an air outlet (21) inside the cabinet, a condenser pipe (22) for the air inlet inside the cabinet, a condensate collection tank (23) for the dehumidification system, a drain pipe (24) for the dehumidification system, a condensate input pipe (25), a condensate return pipe (26), a drain outlet (27) for the dehumidification system, a refrigeration compressor (28), a fan (30) for the air inlet of the chromatography cabinet, an air inlet (31) for the chromatography cabinet, an air inlet pipe (32) for the chromatography cabinet, an air inlet control valve (33) for the chromatography cabinet, an air return control valve (34) for the chromatography cabinet, an air return pipe (35) for the chromatography cabinet, a fan (37) for the air outlet of the chromatography cabinet, an air outlet (38) for the chromatography cabinet, and an air outlet pipe (39) for the chromatography cabinet. The air inlet (19) and air outlet (21) of the chromatography cabinet are located above and below the back panel (20) of the cabinet, respectively. The air inlet condenser pipe (22), the dehumidification system condensate collection tank (23), the dehumidification system drain pipe (24), the dehumidification system drain outlet (27), the air inlet fan (30), the air inlet (31), the air inlet pipe (32), the air inlet control valve (33), the air return control valve (34), the air return pipe (35), the air outlet fan (37), the air outlet (38), the air outlet pipe (39), and the air outlet control valve (40) of the chromatography cabinet are all located on the back of the back panel (20).

[0015] As a further embodiment of this utility model: the cabinet air inlet condenser pipe (22) is located between the cabinet air inlet (19) and the chromatography cabinet air inlet pipe (32). The air outside the chromatography cabinet is drawn into the chromatography cabinet air inlet pipe (32) through the chromatography cabinet air inlet fan (30) from the chromatography cabinet air inlet (31), and cooled into cold air by the cabinet air inlet condenser pipe (22) and enters the chromatography cabinet. During the cooling process of the air outside the chromatography cabinet by the cabinet air inlet condenser pipe (22), the moisture in the air is condensed into liquid and falls into the dehumidification system condensate collection tank (23), and then discharged from the chromatography cabinet through the dehumidification system drain pipe (24) below and the dehumidification system drain outlet (27).

[0016] As a further embodiment of this utility model: the refrigeration compressor (28) is located below the cabinet bottom platform (18); the refrigeration compressor (28) delivers condensate to the cabinet air inlet condenser pipe (22) through the condensate input pipe (25), and then returns it to the refrigeration compressor (28) through the condensate return pipe (26); the condensate input pipe (25) and the condensate return pipe (26) are both located below the cabinet bottom platform (18) and on the back of the cabinet back panel (20).

[0017] As a further embodiment of this utility model, the air outlet (38) of the chromatography cabinet can be connected to an external extension pipeline to discharge the irritating or corrosive gases inside the chromatography cabinet and keep them as far away from the chromatography cabinet as possible.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model provides a novel biological laboratory chromatography cabinet, in which upper and lower air curtain units are installed on the front side of the glass cabinet door. When the glass cabinet door is closed, the upper air curtain automatically activates, forming an air curtain that effectively blocks the exchange of hot and cold air between the inside of the chromatography cabinet and the outside air through the glass cabinet door (glass is not a good insulation material), thereby maintaining a stable temperature inside the chromatography cabinet and achieving energy saving. On the other hand, the air curtain effectively prevents condensation droplets formed by moisture from the outside air adhering to the cold glass cabinet door from obstructing the observation line of the experimental operators outside the chromatography cabinet. Furthermore, if moisture from the outside air is allowed to adhere to the cold glass cabinet door for a long time, the condensation droplets will further gather and fall onto the glass cabinet. In the past, after a period of use, water often accumulated at the bottom of biological chromatography cabinets, posing a safety hazard to operators who might slip. Furthermore, the metal components at the bottom of the cabinet doors often developed paint peeling and rust after a while, affecting the cabinet's appearance and potentially leading to its failure. Therefore, the air curtain system designed in this invention saves energy, ensures that operators outside the cabinet can easily monitor the experimental progress inside, guarantees their safety, and extends the lifespan of the chromatography cabinet.

[0020] 2. This utility model provides a novel biological laboratory chromatography cabinet, in which upper and lower air curtain units are installed on the front side of the glass cabinet door. When the glass cabinet door is opened, the upper and lower air curtains are automatically activated. The air curtains formed can effectively prevent hot outside air from entering the chromatography cabinet due to the door being opened; they can also effectively prevent parts of the experimental operator's body (such as hands, shoulders, or upper body) from entering the chromatography cabinet and bringing hot outside air into the chromatography cabinet, thereby maintaining a stable temperature inside the chromatography cabinet and achieving energy saving and cost reduction.

[0021] 3. The present invention provides a novel biological laboratory chromatography cabinet, wherein upper and lower air curtain units are provided on the front side of the glass cabinet door. The airflow output of the upper and lower air curtains can be selected in fixed-frequency or variable-frequency mode. When the airflow level is entered on the device control panel and the start menu is clicked, the upper and lower air curtain units enter fixed-frequency mode; when the variable-frequency menu is clicked on the device control panel, the upper and lower air curtain units enter variable-frequency mode. The airflow of the air curtains can be intelligently adjusted according to the temperature difference between the inside and outside of the chromatography cabinet. For example, throughout the year, the airflow is automatically increased when the temperature difference between the inside and outside of the chromatography cabinet is large in summer and automatically decreased when the temperature difference is small in winter. During the day, the airflow is automatically increased when the temperature difference between the inside and outside of the chromatography cabinet is large and automatically decreased when the temperature difference is small at night. Thus, although this invention adds upper and lower air curtain units, it does not actually consume much electricity. Combined with the electricity savings from maintaining a stable temperature inside the chromatography cabinet, this invention does not actually increase the electricity cost by much. If the novel biological laboratory chromatography cabinet provided by this invention is used for a long time, its electricity cost may even be less than that of biological laboratory chromatography cabinets currently sold on the market.

[0022] 4. This utility model provides a novel biological laboratory chromatography cabinet. Because it incorporates upper and lower air curtain units on the front of the glass cabinet door, it prevents moisture from the outside air from condensing on the cold glass door and causing circuit malfunctions / short circuits. Therefore, this utility model allows for the installation of an embedded control panel and device switches on the glass cabinet door. This not only allows operators to input / observe working parameters and turn the biological laboratory chromatography cabinet on / off from a more comfortable position, but also makes the chromatography cabinet more aesthetically pleasing and modern. In contrast, currently available biological laboratory chromatography cabinets lack the upper and lower air curtain units of this utility model, forcing them to place the control panel and switches at the top of the cabinet, leading to numerous inconveniences for operators and observers. Therefore, this utility model patent is superior.

[0023] 5. This utility model provides a novel biological laboratory chromatography cabinet. A volatile organic compound (VOC) probe is installed inside the cabinet to monitor the gases within, and it is connected to an internal and external circulating cooling system. When the VOC probe detects that the gases inside the cabinet are irritating or corrosive, the external circulating cooling system is automatically activated. Fresh air from outside the cabinet is drawn in and cooled by condensate supplied by a refrigeration compressor, then injected into the cabinet as cold air. This removes the existing irritating or corrosive gases from the cabinet. This prevents irritating or corrosive gases generated during experiments from being drawn into the cabinet's circulating cooling system, thus protecting the internal piping and extending the cabinet's lifespan. Furthermore, the removal of irritating or corrosive gases from the system effectively protects the chromatography equipment from corrosion by these harmful gases, further extending the lifespan of the various chromatography instruments within the cabinet.

[0024] 6. This utility model provides a novel biological laboratory chromatography cabinet, in which a volatile organic compound (VOC) probe is installed to monitor the gas inside the cabinet, and an internal and external circulation cooling system is connected. When the VOC probe does not detect an irritating or corrosive gas inside the cabinet, the internal circulation cooling system is automatically activated, introducing the existing cold air inside the cabinet into the internal circulation cooling system for repeated circulation. The refrigeration compressor only needs to provide a small amount of condensate to compensate for the cooling loss during the experiment, thereby achieving energy-saving and environmentally friendly effects.

[0025] 7. The novel biological laboratory chromatography cabinet provided by this utility model has a wide range of applications. It can provide low-temperature conditions for the preparation of protein / peptide / carbohydrate substances by various chromatography equipment, and can also be used as a constant temperature refrigerator for low-temperature storage of various biological substances. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a three-dimensional structural diagram of a novel biological laboratory chromatography cabinet according to this utility model.

[0028] Figure 2 This is a schematic diagram of the internal structure of a novel biological laboratory chromatography cabinet according to this utility model.

[0029] Figure 3 This is a schematic diagram of the internal back panel structure of a novel biological laboratory chromatography cabinet according to this utility model.

[0030] Figure 4 This is a schematic diagram of the condensation and dehumidification pipeline structure of a novel biological laboratory chromatography cabinet according to this utility model.

[0031] Figure 5This is a schematic diagram of the upper and lower air curtain units and the internal and external circulating cooling pipeline structure of a novel biological laboratory chromatography cabinet according to this utility model.

[0032] Figure 6 This is a schematic diagram of the embedded controller panel of a novel biological laboratory chromatography cabinet according to this utility model.

[0033] In the diagram, 1. Upper air curtain unit air inlet; 2. Upper air curtain unit air outlet; 3. Left cabinet door handle; 4. Left glass cabinet door; 5. Lower air curtain unit air outlet; 6. Lower air curtain unit air inlet; 7. External temperature monitoring probe; 8. Embedded control panel; 9. Device switch; 10. Chromatography cabinet; 11. Right cabinet door handle; 12. Right glass cabinet door; 13. Internal power strip; 14. Internal temperature and humidity monitoring probe; 15. Internal stainless steel support rod; 16. Internal stainless steel platform; 17. Internal volatile organic compound probe; 18. Cabinet bottom platform; 19. Internal air inlet; 20. Internal back panel; 21. Internal exhaust vent; 22. Internal air inlet condenser pipe; 3. Dehumidification system condensate collection tank; 24. Dehumidification system drain pipe; 25. Condensate inlet pipe; 26. Condensate return pipe; 27. Dehumidification system drain outlet; 28. Refrigeration compressor; 29. ​​Upper air curtain unit fan; 30. Chromatography cabinet inlet fan; 31. Chromatography cabinet inlet; 32. Chromatography cabinet inlet pipe; 33. Chromatography cabinet inlet control valve; 34. Chromatography cabinet air duct return control valve; 35. Chromatography cabinet air duct return pipe; 36. Infrared sensor; 37. Chromatography cabinet outlet fan; 38. Chromatography cabinet outlet; 39. Chromatography cabinet outlet pipe; 40. Chromatography cabinet outlet control valve; 41. Chromatography cabinet column base; 42. Lower air curtain unit fan. Detailed Implementation

[0034] The following embodiments will be described in detail with reference to the accompanying drawings. In practical applications, the shape, thickness, or height of each component may be enlarged or reduced. The embodiments listed in this utility model are only for illustrating the utility model and are not intended to limit the scope of the utility model. Any obvious modifications or changes made to this utility model do not depart from the spirit and scope of this utility model.

[0035] Example 1

[0036] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A novel biological laboratory chromatography cabinet includes a chromatography cabinet body, upper and lower air curtain units, and an internal and external circulation cooling and dehumidification system.

[0037] The chromatography cabinet includes a cabinet body 10, with a left glass door 4 and a right glass door 12 on the front. The left glass door 4 has a left door handle 3, and the right glass door 12 has a right door handle 11. Inside the chromatography cabinet 10 are an internal power strip 13, an internal temperature and humidity monitoring probe 14, an internal stainless steel support rod 15, an internal stainless steel platform 16, a bottom platform 18, an internal back panel 20, and chromatography cabinet legs 42. The above structure of the chromatography cabinet 10 is a standard configuration.

[0038] Furthermore, the chromatography cabinet 10 is equipped with a volatile organic compound probe 17.

[0039] An external temperature monitoring probe 7 is located on the upper right side of the chromatography cabinet 10. The main body of the chromatography cabinet also includes an embedded control panel 8, next to which is a device switch 9. See also... Figure 1 The embedded control panel 8 and device switch 9 can be embedded in the left glass cabinet door 4 or the right glass cabinet door 12, respectively, and the embedding position can be selected to a position that is comfortable for the experimenter to operate.

[0040] See Figure 1 and Figure 5 The upper air curtain unit includes an upper air curtain unit inlet 1, an upper air curtain unit outlet 2, and an upper air curtain unit fan 29; the lower air curtain unit includes a lower air curtain unit outlet 5, a lower air curtain unit inlet 6, and a lower air curtain unit fan 42. The upper and lower air curtain units are respectively located at the top and bottom of the front side of the glass cabinet door. The airflow direction of the upper air curtain unit inlet 1 is downward, and the airflow direction of the lower air curtain unit outlet 5 is upward. An infrared sensor 36 is located on the inside of the glass cabinet door to detect external heat sources entering the chromatography cabinet, so as to activate the upper and lower air curtain units in a timely manner.

[0041] See Figure 3 , Figure 4 and Figure 5 The internal and external circulation cooling and dehumidification system includes an air inlet 19, an air outlet 21, an air inlet condenser pipe 22, a dehumidification system condensate collection tank 23, a dehumidification system drain pipe 24, a condensate input pipe 25, a condensate return pipe 26, a dehumidification system drain outlet 27, a refrigeration compressor 28, a chromatography cabinet air inlet fan 30, a chromatography cabinet air inlet 31, a chromatography cabinet air inlet pipe 32, a chromatography cabinet air inlet control valve 33, a chromatography cabinet air return control valve 34, a chromatography cabinet air return pipe 35, a chromatography cabinet air outlet fan 37, a chromatography cabinet air outlet 38, a chromatography cabinet air outlet pipe 39, and a chromatography cabinet air outlet control valve 40.

[0042] See Figure 2 , Figure 3 , Figure 4 and Figure 5The air inlet 19 and air outlet 21 inside the cabinet are located in the upper and lower halves of the back panel 20 inside the cabinet, respectively. The air inlet condenser pipe 22, the dehumidification system condensate collection tank 23, the dehumidification system drain pipe 24, the dehumidification system drain outlet 27, the air inlet fan 30, the air inlet 31, the air inlet pipe 32, the air inlet control valve 33, the air return control valve 34, the air return pipe 35, the air outlet fan 37, the air outlet 38, the air outlet pipe 39, and the air outlet control valve 40 are all located on the back of the back panel 20 inside the cabinet.

[0043] See Figure 3 , Figure 4 and Figure 5 The air inlet condenser pipe 22 is located between the air inlet 19 and the air inlet pipe 32 of the chromatography cabinet. Air outside the chromatography cabinet is drawn into the air inlet pipe 32 from the air inlet 31 through the air inlet fan 30 of the chromatography cabinet. It is cooled by the air inlet condenser pipe 22 and enters the chromatography cabinet as cold air. During the cooling process of the air outside the chromatography cabinet by the air inlet condenser pipe 22, the moisture in the air is condensed into liquid and falls into the dehumidification system condensate collection tank 23. Then, it is discharged from the chromatography cabinet through the dehumidification system drain pipe 24 below and from the dehumidification system drain outlet 27.

[0044] See Figure 4 The refrigeration compressor 28 is located below the cabinet bottom platform 18. The refrigeration compressor 28 delivers condensate to the condenser pipe 22 at the air inlet inside the cabinet through the condensate inlet pipe 25, and then returns it to the refrigeration compressor 28 through the condensate return pipe 26. The condensate inlet pipe 25 and the condensate return pipe 26 are both located below the cabinet bottom platform 18 and on the back of the cabinet back panel 20.

[0045] In actual operation, the air outlet 38 of the chromatography cabinet can be connected to an external extension pipeline to discharge irritating or corrosive gases from the chromatography cabinet and keep them as far away from the chromatography cabinet as possible.

[0046] See Figure 6 The embedded control panel 8 is a touch screen, including a "Airflow" column, a "Temperature" column, a "Humidity" column, a "Upper and Lower Air Curtain Unit" menu, a "Internal and External Circulation Cooling and Dehumidification System" menu, a "Variable Frequency" menu, two "Start" menus, two "Stop" menus, a "OK" menu, a "Modify" menu, and a series of numeric menus (0, 1, 2, 3, 4, 5, 6, 7, 8, 9).

[0047] The uses of this utility model are as follows:

[0048] Before starting the new biological laboratory chromatography cabinet, open the left glass cabinet door 4 and the right glass cabinet door 12 through the left cabinet door handle 3 and the right cabinet door handle 11. Arrange the various chromatography devices on the stainless steel platform 16 and the bottom platform 18 inside the cabinet according to the experimental requirements, and plug in the power strip 13 inside the cabinet for use.

[0049] Turn on the device switch 9, click the "Upper and Lower Air Curtain Unit" menu on the embedded control panel 8, and then click the "Variable Frequency" menu and "Start" menu below in sequence. The upper air curtain unit fan 29 will start running, drawing in air from the upper air curtain unit air inlet 1 and spraying downward airflow from the upper air curtain unit air outlet 2 to form an upper air curtain. The airflow of the air curtain can be intelligently variable frequency adjusted according to the temperature difference between the inside and outside of the chromatography cabinet monitored by the temperature and humidity monitoring probe 14 inside the cabinet and the temperature monitoring probe 7 outside the cabinet. Next, click the "Internal and External Circulation Cooling and Dehumidification System" menu, and enter the working parameters in the "Temperature" and "Humidity" columns respectively through a series of digital menus (0,1,2,3,4,5,6,7,8,9). Then click the "OK" menu and "Start" menu in sequence to start the chromatography cabinet cooling and heat preservation program.

[0050] When the temperature and humidity inside the chromatography cabinet reach the parameters set by the cooling and insulation program, the chromatography experiment begins. During the experiment, if necessary, the left glass cabinet door 4 and the right glass cabinet door 12 are opened using the left cabinet door handle 3 and the right cabinet door handle 11, respectively. The experimenter places the relevant materials into the chromatography cabinet. As the experimenter enters the space inside the chromatography cabinet, the infrared sensor 36 immediately detects the heat source and automatically starts the lower air curtain unit fan 42. Air is drawn in from the lower air curtain unit air inlet 6 and ejected upward airflow from the lower air curtain unit air outlet 5, forming a lower air curtain. When the experimenter has placed the materials and left the space inside the chromatography cabinet, the infrared sensor 36 no longer detects the heat source and automatically stops the lower air curtain unit fan 42.

[0051] During the chromatography experiment, when the volatile organic compound probe 17 detects that the gas inside the chromatography cabinet is irritating or corrosive, the external circulation cooling system is automatically activated: the chromatography cabinet inlet control valve 33 and the chromatography cabinet outlet control valve 40 are opened, the chromatography cabinet air reflux control valve 34 is closed, and the chromatography cabinet inlet fan 30 and the chromatography cabinet outlet fan 37 are started. Fresh air from outside the chromatography cabinet is drawn into the chromatography cabinet inlet duct 32 through the chromatography cabinet inlet 31 and cooled into cold air by the condensate supplied by the refrigeration compressor 28 in the inlet condenser 22. The cold air is then poured into the chromatography cabinet through the inlet 19, and the original irritating or corrosive gas inside the chromatography cabinet is discharged from the chromatography cabinet outlet 38 through the outlet duct 39 from the outlet 21.

[0052] During the chromatography experiment, if the volatile organic compound probe 17 does not detect any irritating or corrosive gas in the chromatography cabinet, the internal circulation cooling system is automatically activated: the chromatography cabinet air reflux control valve 34 is opened, the chromatography cabinet air inlet control valve 33 and the chromatography cabinet air outlet control valve 40 are closed, and the chromatography cabinet air inlet fan 30 is started, so that the cold air in the chromatography cabinet enters the chromatography cabinet air outlet duct 39 from the internal exhaust vent 21, and then passes through the chromatography cabinet air reflux duct 35, the chromatography cabinet air reflux control valve 34 and the chromatography cabinet air inlet duct 32, and is poured into the chromatography cabinet from the internal air inlet 19, realizing the circulation of cold air in the chromatography cabinet.

[0053] During the chromatography experiment, when it is necessary to adjust the temperature and humidity inside the chromatography cabinet, first click the "Internal and External Circulation Cooling and Dehumidification System" menu on the embedded control panel (8), then click the "Stop" menu and the "Modify" menu in sequence, and then enter the new working parameters in the "Temperature" column and the "Humidity" column respectively through a series of digital menus (0,1,2,3,4,5,6,7,8,9), and then click the "OK" menu and the "Start" menu in sequence to start the new cooling and heat preservation program of the chromatography cabinet.

[0054] During the chromatography experiment, when it is necessary to adjust the airflow output of the upper and lower air curtain units of the chromatography cabinet from variable frequency mode to fixed frequency mode, first click the "Upper and Lower Air Curtain Units" menu on the embedded control panel 8, then click the "Stop" menu and the "Modify" menu in sequence. Then, enter the new working parameters in the "Airflow" column through a series of numerical menus (0,1,2,3,4,5,6,7,8,9). Finally, click the "OK" menu and the "Start" menu in sequence to realize that the airflow output of the upper and lower air curtain units is in fixed frequency mode.

[0055] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A novel biological laboratory chromatography cabinet, characterized in that, The system includes a chromatography cabinet body, and upper and lower air curtain units and an internal and external circulation cooling and dehumidification system installed on the chromatography cabinet body. The upper air curtain unit includes an upper air curtain unit inlet (1), an upper air curtain unit outlet (2), and an upper air curtain unit fan (29). The lower air curtain unit includes a lower air curtain unit outlet (5), a lower air curtain unit inlet (6), and a lower air curtain unit fan (42). The upper and lower air curtain units are respectively installed on the front side of the glass cabinet door of the chromatography cabinet body. The air inlet (1) of the upper air curtain unit blows downwards, and the air outlet (5) of the lower air curtain unit blows upwards.

2. The novel biological laboratory chromatography cabinet according to claim 1, characterized in that, It also includes an infrared sensor (36) installed on the inside of the glass cabinet door, and the infrared sensor (36) is linked with the upper and lower air curtain units.

3. The novel biological laboratory chromatography cabinet according to claim 1, characterized in that, The main body of the chromatography cabinet includes a chromatography cabinet body (10), and the front of the chromatography cabinet body (10) is provided with a left glass cabinet door (4) and a right glass cabinet door (12); the chromatography cabinet body (10) is provided with an internal power strip (13) and an internal temperature and humidity monitoring probe (14); the right side of the chromatography cabinet body (10) near the upper end is provided with an external temperature monitoring probe (7); the main body of the chromatography cabinet also includes an embedded control panel (8), and a device switch (9) is provided next to the embedded control panel (8); the embedded control panel (8) and the device switch (9) are respectively embedded in the left glass cabinet door (4) or the right glass cabinet door (12).

4. A novel biological laboratory chromatography cabinet according to claim 3, characterized in that, The chromatography cabinet (10) is equipped with a volatile organic compound probe (17).

5. A novel biological laboratory chromatography cabinet according to claim 3, characterized in that, The embedded control panel (8) is a touch screen, including a "airflow" column, a "temperature" column, a "humidity" column, a "top and bottom air curtain unit" menu, a "internal and external circulation cooling and dehumidification system" menu, a "frequency conversion" menu, two "start" menus, two "stop" menus, a "confirm" menu, a "modify" menu, and a series of numeric menus (0,1,2,3,4,5,6,7,8,9).

6. A novel biological laboratory chromatography cabinet according to claim 1, characterized in that, The internal and external circulation cooling and dehumidification system includes an air inlet (19) inside the cabinet, an air outlet (21) inside the cabinet, a condenser pipe (22) for the air inlet inside the cabinet, a condensate collection tank (23) for the dehumidification system, a drain pipe (24) for the dehumidification system, a condensate input pipe (25), a condensate return pipe (26), a drain outlet (27) for the dehumidification system, a refrigeration compressor (28), a fan (30) for the air inlet of the chromatography cabinet, an air inlet (31) for the chromatography cabinet, an air inlet pipe (32) for the chromatography cabinet, an air inlet control valve (33) for the chromatography cabinet, an air return control valve (34) for the chromatography cabinet, an air return pipe (35) for the chromatography cabinet, a fan (37) for the air outlet of the chromatography cabinet, an air outlet (38) for the chromatography cabinet, an air outlet pipe (39) for the chromatography cabinet, and an air outlet for the chromatography cabinet. Control valve (40); the cabinet air inlet (19) and cabinet air outlet (21) are located above and below the cabinet back panel (20) respectively; the cabinet air inlet condenser pipe (22), dehumidification system condensate collection tank (23), dehumidification system drain pipe (24), dehumidification system drain outlet (27), chromatography cabinet air inlet fan (30), chromatography cabinet air inlet (31), chromatography cabinet air inlet pipe (32), chromatography cabinet air inlet control valve (33), chromatography cabinet air path return control valve (34), chromatography cabinet air path return pipe (35), chromatography cabinet air outlet fan (37), chromatography cabinet air outlet (38), chromatography cabinet air outlet pipe (39) and chromatography cabinet air outlet control valve (40) are all located on the back of the cabinet back panel (20).

7. A novel biological laboratory chromatography cabinet according to claim 6, characterized in that, The air inlet condenser (22) is located between the air inlet (19) and the air inlet pipe (32) of the chromatography cabinet. The air outside the chromatography cabinet is drawn into the air inlet pipe (32) of the chromatography cabinet through the air inlet fan (30) and cooled by the air inlet condenser (22) to become cold air and enter the chromatography cabinet. The condensate generated by the air outside the chromatography cabinet during the cooling process by the air inlet condenser (22) falls into the condensate collection tank (23) of the dehumidification system and is then discharged from the dehumidification system drain (27) through the dehumidification system drain pipe (24) below.

8. A novel biological laboratory chromatography cabinet according to claim 6, characterized in that, The refrigeration compressor (28) is located below the cabinet bottom platform (18); the refrigeration compressor (28) delivers condensate to the cabinet air inlet condenser pipe (22) through the condensate input pipe (25), and then returns it to the refrigeration compressor (28) through the condensate return pipe (26); the condensate input pipe (25) and the condensate return pipe (26) are both located below the cabinet bottom platform (18) and on the back of the cabinet back panel (20).

9. A novel biological laboratory chromatography cabinet according to claim 6, characterized in that, The air outlet (38) of the chromatography cabinet is connected to an external extension pipe.

Images