An experimental reagent refrigeration system

Abstract

This invention discloses an experimental reagent refrigeration system, including a refrigeration chamber, a reagent storage area, and a refrigeration system. The reagent storage area consists of multiple reagent cabinets and also includes a detection module, a control module, an alarm module, a heat flow sensor, and a frost sensor. The heat flow sensor and the frost sensor are connected to the control module, the detection module is connected to the control module, and the control module is connected to the alarm module.

Description

Technical Field

[0001] This invention relates to the field of reagent refrigeration technology, and in particular to a laboratory reagent refrigeration system. Background Technology

[0002] Currently, most reagents require refrigeration or freezing at low temperatures. Exceeding these refrigeration conditions can lead to reduced reagent activity or even inactivation. In refrigeration systems, reagents inside the cabinet are refrigerated, and the insulation of the refrigeration compartment, as well as frost and water melting, are monitored. The refrigeration temperature is adjusted to ensure that the reagents are within a suitable storage range. However, existing refrigeration systems cool the entire reagent cabinet indiscriminately, resulting in excessive energy consumption. Furthermore, reagent cabinets may malfunction during use, requiring timely alarms and repairs. Current technology cannot accurately identify the alarm conditions within the reagent cabinet, necessitating manual monitoring. Summary of the Invention

[0003] To address the aforementioned technical problems, the purpose of this invention is to provide an experimental reagent refrigeration system, comprising a refrigeration chamber, a reagent storage area, and a refrigeration system. The reagent storage area consists of multiple reagent cabinets and also includes a detection module, a control module, an alarm module, a heat flow sensor, and a frost sensor. The heat flow sensor and frost sensor are connected to the control module, the detection module is connected to the control module, and the control module is connected to the alarm module.

[0004] Furthermore, the detection module includes a weight sensor, a switch sensor, an infrared sensor, a first line, a second line, and a fourth line. The weight sensor is connected to the first line, the switch sensor is connected to the second line, the infrared sensor is connected to the fourth line, and the first line, the second line, and the fourth line are connected to the control module.

[0005] Furthermore, the detection module also includes a first potentiometer, a second resistor, a third potentiometer, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode, and a third circuit. The first circuit is connected to the signal terminal of the first potentiometer. One end of the first potentiometer is connected to one end of the second resistor, one end of the third potentiometer, and a power supply. The other end of the third potentiometer is connected to one end of the fourth resistor. The other end of the fourth resistor is connected to the anode of the first diode. The cathode of the first diode is connected to the cathode of the second diode and the emitter of the third diode. The anode of the second diode is connected to one end of the eighth resistor. The other end of the eight resistors is connected to the other end of the first potentiometer. The base of the third diode is connected to one end of the seventh resistor. The other end of the seventh resistor is connected to one end of the sixth resistor and the tap of the first potentiometer. The other end of the sixth resistor is connected to the anode of the fourth diode. The cathode of the fourth diode is connected to the collector of the fifth diode and the anode of the sixth diode. The base of the fifth diode is connected to one end of the fifth resistor. The other end of the fifth resistor is connected to the tap of the third potentiometer. The emitter of the fifth diode is connected to the collector of the third diode. The sixth diode and the seventh diode are optically coupled. The collector of the seventh diode is connected to the other end of the second resistor. The emitter of the seventh diode is connected to one end of the third line. The second line is connected to the signal terminal of the third potentiometer.

[0006] Furthermore, the control module includes a first relay, a second relay, a ninth resistor, a tenth resistor, an eighth diode, a fourth circuit, and a sixth circuit. The coil of the first relay is connected to the detection module. One end of the auxiliary normally open contact of the first relay is connected to the power supply. The other end of the auxiliary normally open contact of the first relay is connected to one end of the ninth resistor and one end of the normally closed contact of the first relay. The other end of the normally closed contact of the first relay is connected to ground. The other end of the ninth resistor is connected to one end of the sixth circuit and the anode of the eighth diode. The other end of the sixth circuit is connected to the alarm module. The cathode of the eighth diode is connected to one end of the tenth resistor. The other end of the tenth resistor is connected to the auxiliary normally open contact of the second relay and one end of the auxiliary normally closed contact of the second relay. The auxiliary normally open contact of the second relay is connected to the power supply. The other end of the auxiliary normally closed contact of the second relay is connected to ground. The coil of the second relay is connected to one end of the fourth circuit. The other end of the fourth circuit is connected to the detection module.

[0007] Furthermore, the control module also includes a third relay, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a ninth diode, a tenth diode, an eleventh diode, a twelfth diode, a thirteenth diode, a seventh circuit, an eighth circuit, and a ninth circuit. One end of the seventh circuit is connected to the frosting sensor, and the other end is connected to the coil of the third relay. One end of the normally open auxiliary contact of the third relay is connected to the power supply, and the other end is connected to one end of the eleventh resistor and one end of the normally closed auxiliary contact of the third relay. The other end of the normally closed auxiliary contact of the third relay is connected to ground. The eleventh resistor... One end is connected to the anode of the ninth diode; the cathode of the ninth diode is connected to the cathode of the tenth diode, one end of the thirteenth resistor, and the base of the eleventh diode; the anode of the tenth diode is connected to one end of the twelfth resistor; the other end of the twelfth resistor is connected to one end of the eighth circuit; the other end of the eighth circuit is connected to the heat flow sensor; the other end of the thirteenth resistor is connected to the collector of the eleventh diode; the emitter of the eleventh diode is connected to one end of the fourteenth resistor, the anode of the thirteenth diode, and the collector of the thirteenth diode; the twelfth diode and the thirteenth diode are optically coupled; the emitter of the twelfth diode is connected to one end of the ninth circuit; and the other end of the ninth circuit is connected to the alarm module.

[0008] Furthermore, the alarm module includes a fifteenth resistor, a fourteenth diode, a fifteenth diode, a first buzzer, and a tenth line. One end of the fifteenth resistor is connected to the sixth line of the control module, the other end of the fifteenth resistor is connected to the anode of the fourteenth diode, the other end of the fifteenth resistor is connected to the anode of the fifteenth diode, the cathode of the fourteenth diode is connected to the tenth line, and the cathode of the fifteenth diode is connected to the first buzzer.

[0009] Furthermore, the alarm module also includes a sixteenth resistor, a sixteenth diode, a second buzzer, and an eleventh line. One end of the sixteenth resistor is connected to the ninth line of the control module, the other end of the sixteenth resistor is connected to the anode of the sixteenth diode, the cathode of the sixteenth diode is connected to one end of the second buzzer, and the other end of the second buzzer is connected to the eleventh line.

[0010] Furthermore, the alarm module also includes a first early warning unit, which is connected to the eleventh line. After receiving the signal from the eleventh line, the first early warning unit is used to shut down the refrigeration system and feed back the signal to the management personnel for maintenance.

[0011] Furthermore, the alarm module also includes a second early warning unit, which is connected to the tenth line.

[0012] Furthermore, the alarm module also includes a third alarm unit, which is used to detect the storage time of the reagent and to issue an alarm when the storage time reaches a preset value.

[0013] The beneficial effects of this invention compared with the prior art are: it can automatically determine the ventilation or cooling status when there are reagents in the reagent cabinet, the malfunction of the reagent cabinet during use, and the situation when personnel access the reagents, and automatically adjust according to the determination signal. It can automatically process the signals monitored in the cold storage room, solve the problem of excessive energy consumption caused by the cold storage system indiscriminately cooling the reagent cabinet, and at the same time, it does not require additional monitoring personnel to assist. Attached Figure Description

[0014] 1-First potentiometer; 2-Second resistor; 3-Third potentiometer; 4-Fourth resistor; 5-Fifth resistor; 6-Sixth resistor; 7-Seventh resistor; 8-Eighth resistor; 9-Ninth resistor; 10-Tenth resistor; 11-Eleventh resistor; 12-Twelfth resistor; 13-Thirteenth resistor; 14-Fourteenth resistor; 15-Fifteenth resistor; 16-First diode; 17-Second diode; 18-Third diode; 19-Fourth diode; 20-Fifth diode; 21-Sixth diode; 22-Seventh diode; 23-Eighth diode; 24-Ninth diode; 25-Twelfth diode; Diode; 26-Eleventh diode; 27-Twelfth diode; 28-Thirteenth diode; 29-Fourteenth diode; 30-Fifteenth diode; 31-First relay; 32-Second relay; 33-Third relay; 34-First buzzer; 35-Second buzzer; 36-First circuit; 37-Second circuit; 38-Third circuit; 39-Fourth circuit; 40-Fifth circuit; 41-Sixth circuit; 42-Seventh circuit; 43-Eighth circuit; 44-Ninth circuit; 45-Tenth circuit; 46-Eleventh circuit; 47-Sixteenth resistor; 48-Sixteenth diode.

[0015] Figure 1 This invention provides a schematic diagram of the overall modular structure of an experimental reagent refrigeration system.

[0016] Figure 2 This invention provides a schematic diagram of the circuit structure of a control module for an experimental reagent refrigeration system.

[0017] Figure 3 This invention provides a schematic diagram of the circuit structure of a detection module for an experimental reagent refrigeration system.

[0018] Figure 4 and Figure 5 This invention provides a schematic diagram of the circuit structure of an alarm module for an experimental reagent refrigeration system. Detailed Implementation

[0019] To make the objectives and advantages of the present invention clearer, the present invention will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or more specific embodiments of the present invention and does not strictly limit the scope of protection specifically claimed by the present invention.

[0020] Referring to the accompanying drawings, the present invention is an experimental reagent refrigeration system, including a refrigeration chamber, a reagent storage area and a refrigeration system. The reagent storage area consists of multiple reagent cabinets and also includes a detection module, a control module, an alarm module, a heat flow sensor and a frost sensor. The heat flow sensor and the frost sensor are connected to the control module, the detection module is connected to the control module, and the control module is connected to the alarm module.

[0021] Specifically, the detection module includes a weight sensor, a switch sensor, an infrared sensor, a first line 36, a second line 37, and a fourth line 39. The weight sensor is connected to the first line 36, the switch sensor is connected to the second line 37, the infrared sensor is connected to the fourth line 39, and the first line 36, the second line 37, and the fourth line 39 are connected to the control module.

[0022] Specifically, the detection module further includes a first potentiometer 1, a second resistor 2, a third potentiometer 3, a fourth resistor 4, a fifth resistor 5, a sixth resistor 6, a seventh resistor 7, an eighth resistor 8, a first diode 16, a second diode 17, a third diode 18, a fourth diode 19, a fifth diode 20, a sixth diode 21, a seventh diode 22, and a third circuit 38. The first circuit 38 is connected to the signal terminal of the first potentiometer 1. One end of the first potentiometer 1 is connected to one end of the second resistor 2, one end of the third potentiometer 3, and a power supply. The other end of the third potentiometer 3 is connected to one end of the fourth resistor 4. The other end of the fourth resistor 4 is connected to the anode of the first diode 16. The cathode of the first diode 16 is connected to the cathode of the second diode 17 and the emitter of the third diode 18. The anode of the second diode 17 is connected to one end of the eighth resistor 8. The other end of the eighth resistor 8 is connected to the other end of the first potentiometer 1. The base of the third diode 18 is connected to one end of the seventh resistor 7. The other end of the seventh resistor 7 is connected to one end of the sixth resistor 6 and the tap of the first potentiometer 1. The other end of the sixth resistor 6 is connected to the anode of the fourth diode 19. The cathode of the fourth diode 19 is connected to the collector of the fifth diode 20 and the anode of the sixth diode 21. The base of the fifth diode 20 is connected to one end of the fifth resistor 5. The other end of the fifth resistor 5 is connected to the tap of the third potentiometer 3. The emitter of the fifth diode 20 is connected to the collector of the third diode 18. The sixth diode 21 is optically coupled to the seventh diode 22. The collector of the seventh diode 22 is connected to the other end of the second resistor 2. The emitter of the seventh diode 22 is connected to one end of the third line 38. The second line 37 is connected to the signal terminal of the third potentiometer 3.

[0023] Specifically, the control module includes a first relay 31, a second relay 32, a ninth resistor 9, a tenth resistor 10, an eighth diode 23, a fourth circuit 39, and a sixth circuit 41. The coil of the first relay 31 is connected to the detection module. One end of the auxiliary normally open contact of the first relay 31 is connected to the power supply. The other end of the auxiliary normally open contact of the first relay 31 is connected to one end of the ninth resistor 9 and one end of the normally closed contact of the first relay 31. The other end of the normally closed contact of the first relay 31 is connected to ground. The other end of the ninth resistor 9 is connected to one end of the sixth circuit 41 and the anode of the eighth diode 23. The other end of the sixth circuit 41 is connected to the alarm module. The cathode of the eighth diode 23 is connected to one end of the tenth resistor 10. The other end of the tenth resistor 10 is connected to the auxiliary normally open contact of the second relay 32 and one end of the auxiliary normally closed contact of the second relay 32. The auxiliary normally open contact of the second relay 32 is connected to the power supply. The other end of the auxiliary normally closed contact of the second relay 32 is connected to ground. The coil of the second relay 32 is connected to one end of the fourth circuit 39. The other end of the fourth circuit 39 is connected to the detection module.

[0024] Specifically, the control module also includes a third relay 33, an eleventh resistor 11, a twelfth resistor 12, a thirteenth resistor 13, a fourteenth resistor 14, a ninth diode 24, a tenth diode 25, an eleventh diode 26, a twelfth diode 27, a thirteenth diode 28, a seventh line 42, an eighth line 43, and a ninth line 44. One end of the seventh line 42 is connected to the frosting sensor, and the other end is connected to the coil of the third relay 33. One end of the auxiliary normally open contact of the third relay 33 is connected to the power supply, and the other end is connected to one end of the eleventh resistor 11 and one end of the auxiliary normally closed contact of the third relay 33. The other end of the auxiliary normally closed contact of the third relay 33 is connected to ground. The eleventh resistor 11... One end is connected to the anode of the ninth diode 24. The cathode of the ninth diode 24 is connected to the cathode of the tenth diode 25, one end of the thirteenth resistor 13, and the base of the eleventh diode 26. The anode of the tenth diode 25 is connected to one end of the twelfth resistor 12. The other end of the twelfth resistor 12 is connected to one end of the eighth line 43. The other end of the eighth line 43 is connected to the heat flow sensor. The other end of the thirteenth resistor 13 is connected to the collector of the eleventh diode 26. The emitter of the eleventh diode 26 is connected to one end of the fourteenth resistor 14, the anode of the thirteenth diode 28, and the collector of the thirteenth diode 28. The twelfth diode 27 is optically coupled to the thirteenth diode 28. The emitter of the twelfth diode 27 is connected to one end of the ninth line 44. The other end of the ninth line 44 is connected to the alarm module.

[0025] Specifically, the alarm module includes a fifteenth resistor 15, a fourteenth diode 29, a fifteenth diode 30, a first buzzer 34, and a tenth line 45. One end of the fifteenth resistor 15 is connected to the sixth line 41 of the control module, the other end of the fifteenth resistor 15 is connected to the anode of the fourteenth diode 29, the other end of the fifteenth resistor 15 is connected to the anode of the fifteenth diode 30, the cathode of the fourteenth diode 29 is connected to the tenth line 45, and the cathode of the fifteenth diode 30 is connected to the first buzzer 34.

[0026] Specifically, the alarm module also includes a sixteenth resistor 47, a sixteenth diode 48, a second buzzer 35, and an eleventh line 46. One end of the sixteenth resistor 47 is connected to the ninth line 44 of the control module, the other end of the sixteenth resistor 47 is connected to the anode of the sixteenth diode 48, the cathode of the sixteenth diode 48 is connected to one end of the second buzzer 35, and the other end of the second buzzer 35 is connected to the eleventh line 46.

[0027] Specifically, the alarm module also includes a first early warning unit, which is connected to the eleventh line 46. After receiving the signal from the eleventh line 46, the first early warning unit is used to shut down the refrigeration system and send a signal back to the management personnel for maintenance.

[0028] Specifically, the alarm module further includes a second early warning unit, which is connected to the tenth line 45.

[0029] Specifically, to prevent cold air loss when the cabinet door is opened during the refrigeration system's cooling process, thus increasing the refrigeration system's power consumption, a weight sensor is connected to the first line 36, and a switch sensor is connected to the second line 37. The weight sensor is located at the bottom of the reagent cabinet, and the second line 37 is located at the door of the reagent cabinet. The first line 36 detects whether there are reagents in the reagent cabinet through the weight sensor, and the second line 37 detects whether the cabinet door is closed through the switch sensor. The first line 36 is connected to the signal terminal of the first potentiometer 1, and the second line 37 is connected to the signal terminal of the third potentiometer 3. The detection module signal is divided into three paths through the first potentiometer 1, the second resistor 2, and the third potentiometer 3. When the weight sensor detects whether there are reagents in the cabinet, it feeds back a high or low level signal to the first line 36. When the switch sensor detects whether the cabinet door is open or closed, it feeds back a low or high level signal to the second line 37.

[0030] To prevent the cabinet door from opening malfunctioningly when reagents are present, the power signal passes through the first potentiometer 1, then enters the eighth resistor 8 and the second diode 17. After passing through the tap of the third potentiometer 3, the power signal enters the fifth resistor 5, causing the fifth diode 20 to conduct. When reagents are present, a feedback signal is sent to the signal terminal of the first potentiometer 1, increasing the resistance at both the tap and the power signal terminal. The third diode 18 is cut off. Simultaneously, the second line 37 is at a high level, causing the fifth diode 20 to conduct. Since its emitter has no loop, the signal from the tap of the first potentiometer 1 reaches the collector of the fifth diode 20. The signal then passes through the sixth diode 21, and the sixth and seventh diodes 22 are optically coupled to output a high-level signal to the third line 38, enabling the subsequent circuits to operate. The power signal, after passing through both ends of the first potentiometer 1, enters the eighth resistor 8 and the second diode 17. After passing through the third potentiometer 3, the power signal reaches the fourth resistor 4 and forms a loop with the first diode 16. It should be noted that the indication method of the third line 38 includes, but is not limited to, indicating the current status of the reagent cabinet to staff through components such as electric bells, electric whistles, or buzzers.

[0031] To prevent the cabinet from being closed due to the absence of reagents, resulting in wasted cooling, the power signal passes through the tap of the first potentiometer 1, the sixth resistor 6, and the seventh resistor 7. The seventh resistor 7 turns on the third diode 18. Since the second line 37 is at a low level, the power signal passes through the third potentiometer 3 and then enters the fourth resistor 4 and the first diode 16, causing the fifth diode 20 to be cut off. The signal passing through the sixth resistor 6 passes through the fourth diode 19 and the sixth diode 21 in sequence. The sixth diode 21 and the seventh diode 22 are optically coupled, and the seventh diode 22 turns on, outputting a high-level signal to the third line 38. Conversely, when the cabinet door is open and cooling is not performed when there are no reagents in the cabinet, the power signal passes through the tap of the first potentiometer 1, the sixth resistor 6, and the seventh resistor 7. The seventh resistor 7 turns on the third diode 18. After passing through the tap of the third potentiometer 3, the power signal passes through the fifth resistor 5, turning on the fifth diode 20. At this time, the signal passing through the sixth resistor 6 passes through the fourth diode 19, the fifth diode 20, and the third diode 18 in sequence, and the sixth diode 21 is cut off, resulting in a low-level signal in the third line 38.

[0032] To prevent a fault indication caused by personnel opening the cabinet door when reagents are present, when a high-level signal is output from the third line 38, the coil of the first relay 31 is energized, the auxiliary normally open contact of the first relay 31 closes, and the auxiliary normally closed contact of the first relay 31 opens. The power signal is split into two paths after passing through the ninth resistor 9. One path is output to the sixth line 41, and the other path is output to the eighth diode 23 and the tenth resistor 10. The signal passes through the tenth resistor 10 and forms a loop through the auxiliary normally closed contact of the second relay 32, causing the sixth line 41 to feed back a low-level signal to the alarm module.

[0033] The cabinet door is open when reagents are present or closed when no reagents are present to prevent the third line 38 indicator signal from going unanswered when no one is in the cold storage. An infrared sensor detects whether there are staff members in the cold storage and sends a staff member signal to the fourth line 39. When no one is in the cold storage, the infrared sensor sends a high-level signal to the fourth line 39, which causes the coil of the second relay 32 to be energized, the auxiliary normally closed contact of the second relay 32 to open, and the auxiliary normally open contact of the second relay 32 to close. The power signal passes through the auxiliary normally open contact of the second relay 32 and the tenth resistor 10, which makes the cathode potential of the eighth diode 23 higher than the anode potential. The sixth line 41 outputs a high-level signal, which is then split into two paths after passing through the fifteenth resistor 15. One path goes through the fourteenth diode 29 to the tenth line 45 to send a remote alarm signal to the second alarm unit, and the other path goes through the fifteenth diode 30 to the first buzzer 34 to send a local alarm signal.

[0034] To prevent frost buildup on the cold storage door from causing abnormal opening, a frost sensor is installed. The frost sensor feeds back a frost signal to the seventh line 42. When frost forms, a high-level signal on the seventh line 42 causes the coil of the third relay 33 to be energized, the normally closed auxiliary contact of the third relay 33 to open, and the normally open auxiliary contact of the third relay 33 to close. The power signal passes through the eleventh resistor 11, the ninth diode 24, and the fourth diode 19. At this time, the base voltage of the eleventh diode 26 is greater than the emitter voltage, so the eleventh diode 26 is cut off, and the thirteenth diode 28 is turned on. After optocoupler between the thirteenth diode 28 and the twelfth diode 27, a high-level signal is output to the ninth line 44.

[0035] To prevent the insulation rate between the cold storage room and the outside from falling below the cold field requirements, which would lead to increased power consumption, a heat flow sensor is installed. When the heat flow sensor detects that the insulation rate between the cold storage room and the outside is lower than a preset value, it feeds back a high-level signal to the eighth line 43. After the signal passes through the twelfth resistor 12, the tenth diode 25, and the thirteenth resistor 13, the base voltage of the eleventh diode 26 is greater than the emitter voltage, so the eleventh diode 26 is cut off and the thirteenth diode 28 is turned on. After the thirteenth diode 28 and the twelfth diode 27 are optically coupled, a high-level signal is output to the ninth line 44.

[0036] The signal received by the ninth line 44 reaches the second buzzer 35 through the sixteenth resistor 47 and the sixteenth diode 48. The second buzzer 35 sends a maintenance alarm signal, which is fed back to the first alarm unit through the eleventh line 46 for warning.

[0037] Specifically, the third alarm unit includes, but is not limited to, a dual-delay time relay, a signal converter, a relay, a limit sensor, and a buzzer. The limit sensor is used to detect whether there are items placed in the reagent cabinet. The signal output terminal of the limit sensor is connected to the input terminal of the signal converter. The signal converter converts the analog signal into a switch signal for output. The output terminal of the signal converter is connected to the start terminal of the dual-delay time relay. The relay coil is connected to the output terminal of the dual-delay time relay. The relay auxiliary contact is connected to the buzzer. The time of the stored items is timed by adjusting the delay start duration range of the dual-delay time relay. When the preset time is exceeded, a feedback signal is sent to the relay, and the buzzer sounds an alarm after the relay coil is energized.

Claims

1. An experimental reagent refrigeration system comprising a refrigeration chamber, a reagent storage area and a refrigeration system, the reagent storage area being composed of a plurality of reagent cabinets, characterized in that, It also includes detection module, control module, alarm module, heat flow sensor, frost sensor, the heat flow sensor, frost sensor is connected with control module, detection module is connected with control module, control module is connected with alarm module; The detection module includes weight sensor, switch sensor, infrared sensor, first line (36), second line (37), fourth line (39), the weight sensor is connected with first line (36), switch sensor is connected with second line (37), infrared sensor is connected with fourth line (39), first line (36), second line (37), fourth line (39) are connected with control module; The detection module also includes first potentiometer (1), second resistance (2), third potentiometer (3), fourth resistance (4), fifth resistance (5), sixth resistance (6), seventh resistance (7), eighth resistance (8), first diode (16), second diode (17), third diode (18), fourth diode (19), fifth diode (20), sixth diode (21), seventh diode (22), third line (38), the first line (36) is connected with the signal end of first potentiometer (1), one end of first potentiometer (1) is connected with one end of second resistance (2), one end of third potentiometer (3), power supply, the other end of third potentiometer (3) is connected with one end of fourth resistance (4), the other end of fourth resistance (4) is connected with the anode of first diode (16), the cathode of first diode (16) is connected with the cathode of second diode (17) and the emitter of third diode (18), the anode of second diode (17) is connected with one end of eighth resistance (8), the other end of eighth resistance (8) is connected with the other end of first potentiometer (1), the base of third diode (18) is connected with one end of seventh resistance (7), the other end of seventh resistance (7) is connected with one end of sixth resistance (6) and the tap end of first potentiometer (1), the other end of sixth resistance (6) is connected with the anode of fourth diode (19), the cathode of fourth diode (19) is connected with the collector of fifth diode (20) and the anode of sixth diode (21), the base of fifth diode (20) is connected with one end of fifth resistance (5), the other end of fifth resistance (5) is connected with the tap end of third potentiometer (3), the emitter of fifth diode (20) is connected with the collector of third diode (18), sixth diode (21) is coupled with seventh diode (22), the collector of seventh diode (22) is connected with the other end of second resistance (2), the emitter of seventh diode (22) is connected with one end of third line (38), second line (37) is connected with the signal end of third potentiometer (3).

2. The experimental reagent refrigeration system of claim 1, wherein, The control module comprises a first relay (31), a second relay (32), a ninth resistor (9), a tenth resistor (10), an eighth diode (23), a fourth line (39), a sixth line (41), the coil of the first relay (31) is connected with the detection module, one end of the auxiliary normally open contact of the first relay (31) is connected with the power supply, the other end of the auxiliary normally open contact of the first relay (31) is connected with one end of the ninth resistor (9) and one end of the normally closed contact of the first relay (31), the other end of the normally closed contact of the first relay (31) is connected with the ground, the other end of the ninth resistor (9) is connected with one end of the sixth line (41) and the anode of the eighth diode (23), the other end of the sixth line (41) is connected with the alarm module, the cathode of the eighth diode (23) is connected with one end of the tenth resistor (10), the other end of the tenth resistor (10) is connected with one end of the auxiliary normally open contact of the second relay (32) and the auxiliary normally closed contact of the second relay (32), the auxiliary normally open contact of the second relay (32) is connected with the power supply, the other end of the auxiliary normally closed contact of the second relay (32) is connected with the ground, the coil of the second relay (32) is connected with one end of the fourth line (39), the other end of the fourth line (39) is connected with the detection module.

3. The experimental reagent refrigeration system of claim 2, wherein, The control module further comprises a third relay (33), an eleventh resistor (11), a twelfth resistor (12), a thirteenth resistor (13), a fourteenth resistor (14), a ninth diode (24), a twelfth diode (25), an eleventh diode (26), a tenth diode (27), a thirteenth diode (28), a seventh line (42), an eighth line (43), a ninth line (44), one end of the seventh line (42) is connected with the frost sensor, the other end of the seventh line (42) is connected with the coil of the third relay (33), one end of the auxiliary normally open contact of the third relay (33) is connected with the power supply, the other end of the auxiliary normally open contact of the third relay (33) is connected with one end of the eleventh resistor (11) and one end of the auxiliary normally closed contact of the third relay (33), the other end of the auxiliary normally closed contact of the third relay (33) is connected with the ground, the other end of the eleventh resistor (11) is connected with the anode of the ninth diode (24), the cathode of the ninth diode (24) is connected with the cathode of the twelfth diode (25), one end of the thirteenth resistor (13) and the base of the eleventh diode (26), one end of the twelfth diode (25) is connected with the anode of the twelfth resistor (12), the other end of the twelfth resistor (12) is connected with one end of the eighth line (43), the other end of the eighth line (43) is connected with the heat flow sensor, the other end of the thirteenth resistor (13) is connected with the collector of the eleventh diode (26), the emitter of the eleventh diode (26) is connected with one end of the fourteenth resistor (14), the anode of the thirteenth diode (28) and the collector of the thirteenth diode (28), the tenth diode (27) is optically coupled with the thirteenth diode (28), the emitter of the tenth diode (27) is connected with one end of the ninth line (44), the other end of the ninth line (44) is connected with the alarm module.

4. The experimental reagent refrigeration system of claim 3, wherein, The alarm module comprises a fifteenth resistor (15), a fourteenth diode (29), a fifteenth diode (30), a first buzzer (34) and a tenth line (45), one end of the fifteenth resistor (15) is connected with the sixth line (41) of the control module, the other end of the fifteenth resistor (15) is connected with the anode of the fourteenth diode (29), the other end of the fifteenth resistor (15) is connected with the anode of the fifteenth diode (30), the fourteenth diode (29) is connected with the tenth line (45), and the cathode of the fifteenth diode (30) is connected with the first buzzer (34).

5. The experimental reagent refrigeration system of claim 4, wherein, The alarm module further comprises a sixteenth resistor (47), a sixteenth diode (48), a second buzzer (35) and an eleventh line (46), one end of the sixteenth resistor (47) is connected with the ninth line (44) of the control module, the other end of the sixteenth resistor (47) is connected with the anode of the sixteenth diode (48), the cathode of the sixteenth diode (48) is connected with one end of the second buzzer (35), and the other end of the second buzzer (35) is connected with the eleventh line (46).

6. The experimental reagent refrigeration system of claim 5, wherein, The alarm module further comprises a first early warning unit, the first early warning unit is connected with the eleventh line (46), and after receiving the signal of the eleventh line (46), the first early warning unit is used for shutting down the refrigeration system and feeding back the signal to the management personnel for maintenance.

7. The experimental reagent refrigeration system of claim 5, wherein, The alarm module further comprises a second early warning unit, the second early warning unit is connected with the tenth line (45).

8. The experimental reagent refrigeration system of claim 6, wherein, The alarm module further comprises a third alarm unit, the third alarm unit is used for detecting the storage time length of the reagent, and when the storage time length reaches a preset value, the third alarm unit is used for alarming and prompting.

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