Drug stability test box

Abstract

The utility model discloses a medicine stability test box, relates to the technical field of medicine test boxes, and aims to solve the problems that a humidifying mechanism in the test box converts liquid into gas through electric heating to increase the humidity in air, but the humid environment is an ideal condition for breeding microorganisms such as bacteria and molds, and the humidity in the air is increased. The problems that in the prior art, bacteria can rapidly breed in a high-humidity environment, especially in a water tank inside a humidifier, the bacteria and other microorganisms may form biological membranes, normal operation of the humidifier is affected, the humidifying performance of the humidifier is reduced, and the humidity adjustment of the drug stability test box is unstable are solved. A humidifying mechanism is arranged in the middle of the interior of the equipment cavity and comprises a liquid adding pipe, a liquid adding pipe valve, a liquid discharging pipe, a liquid discharging pipe valve, a humidifying pipe, a humidifying pipe valve, a cleaning driving motor frame, a cleaning driving motor, a cleaning lead screw, a sliding block, a cleaning brush and a fixing frame.

Description

Technical Field

[0001] The utility model relates to the technical field of medicine test chambers, in particular to a medicine stability test chamber. Background Technique

[0002] A medicine stability test chamber is a laboratory device used to test the stability and durability of medicines under different environmental conditions. It can simulate different environmental conditions by controlling factors such as temperature, humidity, and light, so as to evaluate the stability and durability of medicines under these conditions. A medicine stability test chamber mainly consists of heating elements, cooling elements, humidity controllers, temperature controllers, light controllers, ventilation systems, and observation windows, etc. These parts work together to simulate various environmental conditions, such as high temperature, low temperature, high humidity, low humidity, different light intensities, etc. A medicine stability test chamber can detect problems that may lead to a decline in medicine quality, providing comprehensive guarantees for pharmaceutical companies and medicine manufacturers to ensure the quality and effectiveness of medicines. In addition, it can quickly and efficiently evaluate the stability of medicines, reduce unnecessary waste of time and costs, and improve the efficiency of drug research and development. At the same time, it can also improve the sustainability of the medicine industry, enabling manufacturers to analyze and take appropriate measures for each product to improve the comprehensive quality of medicines and reduce asset losses due to medicine deterioration.

[0003] Chinese Patent Publication No. is CN212167453U, a medicine stability test chamber, including: a box body, an outer layer box door, an inner layer transparent box door, and a power supply. It also includes a heating film formed on the inner surface of the inner layer transparent box door, and the heating film is connected to the power supply. When the medicine stability test chamber of the utility model conducts an accelerated test or a high temperature and high humidity test, the control instrument will control the heating film to work and heat the inner layer transparent box door to avoid the generation of condensed water on the inner layer transparent box door.

[0004] The above-mentioned existing technical solutions have the following defects: The humidifying mechanism in the test chamber converts liquid into gas through electric heating to increase the humidity in the air. However, this humid environment is an ideal condition for the reproduction of microorganisms such as bacteria and molds. Bacteria can reproduce rapidly in a high humidity environment, especially in the water tank inside the humidifier. Bacteria and other microorganisms may form a biofilm, which will affect the normal operation of the humidifier, reduce its humidifying performance, and lead to unstable humidity adjustment of the medicine stability test chamber. Therefore, we propose a medicine stability test chamber to facilitate the solution of the problems mentioned above. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a drug stability test chamber to solve the problem proposed in the above background technology that the humidifying mechanism in the test chamber converts liquid into gas through electric heating to increase the humidity in the air. However, this humid environment is an ideal condition for the reproduction of microorganisms such as bacteria and molds. Bacteria can rapidly reproduce in a high-humidity environment, especially in the water tank inside the humidifier. Bacteria and other microorganisms may form biofilms, which will affect the normal operation of the humidifier, reduce its humidifying performance, and lead to unstable humidity adjustment in the drug stability test chamber.

[0006] To achieve the above purpose, the present utility model provides the following technical solution: A drug stability test chamber includes a test chamber. A device cavity is provided at the lower end of the test chamber. Three test cavities are opened at the middle position of the test chamber. A humidifying mechanism is provided at the middle position inside the device cavity. The humidifying mechanism includes a liquid adding pipe, a liquid adding pipe valve, a liquid discharging pipe, a liquid discharging pipe valve, a humidifying pipe, a humidifying pipe valve, a cleaning drive motor frame, a cleaning drive motor, a cleaning lead screw, a sliding block, a cleaning brush, and a fixing frame.

[0007] Preferably, a display module is installed on the front side of the upper end of the test chamber. A chamber door is rotatably installed on the front side of the test cavity through a hinge. A flat lamp is fixedly installed on the inner side of the chamber door.

[0008] Preferably, four magnet blocks are symmetrically installed on both sides of the upper and lower ends of the inner side of the chamber door. Four electromagnet blocks are symmetrically installed on both sides of the upper and lower ends of the test cavity, and the electromagnet blocks are arranged corresponding to the magnet blocks. A sensor slot is opened at the middle position of the upper end of the test cavity. A temperature sensor, a pressure sensor, and a humidity sensor are respectively arranged inside the sensor slot. The temperature sensor is located on one side of the pressure sensor, and the humidity sensor is located on the other side of the pressure sensor. The lower ends of the temperature sensor, the pressure sensor, and the humidity sensor all extend into the interior of the test cavity.

[0009] Preferably, a compressor and an evaporator are installed on one side inside the device cavity, and the compressor is located in front of the evaporator. A fan and a condenser are installed on one side inside the device cavity, and the fan is located on one side of the condenser. A four-way valve and a first stop valve are installed on one side of the compressor and the evaporator. A second stop valve is installed below the four-way valve and the first stop valve.

[0010] Preferably, the air outlet end of the compressor is sealed and connected to the air inlet end of the four-way valve through a connecting pipe, the air outlet end one of the four-way valve is sealed and connected to one end of the first stop valve through a connecting pipe, the air outlet end two of the four-way valve is sealed and connected to the air inlet end of the compressor through a connecting pipe, the air outlet end three of the four-way valve is sealed and connected to one end of the condenser through a connecting pipe, the other end of the condenser is sealed and connected to one end of the second stop valve through a connecting pipe, the other end of the second stop valve is sealed and connected to the other end of the first stop valve through a connecting pipe, one side of the condenser is sealed and connected to the inner wall of one end of the test chamber through the air inlet pipe, and an air inlet pipe valve is sealed and installed on the upper end of the air inlet pipe, the inner wall of the other end of the test chamber is sealed and connected to the exhaust pipe, and an exhaust pipe valve is sealed and installed on one side of the exhaust pipe.

[0011] Preferably, two electrode sheets are symmetrically arranged inside the humidifying mechanism, a humidifying tube is sealably installed at the upper end of the humidifying mechanism, and the upper end of the humidifying tube is sealably connected to the air inlet pipe, the lower end of the air inlet pipe is sealably connected to the humidifying tube valve, a liquid adding tube is sealably installed on one side of the humidifying mechanism, one end of the liquid adding tube is sealably connected to the liquid adding tube valve, a liquid drain pipe is sealably installed at the lower end of the liquid adding tube, and the upper end of the liquid drain pipe is sealably connected to the liquid drain pipe valve.

[0012] Preferably, a cleaning drive motor frame is fixedly installed at the lower end of the humidifying mechanism, a cleaning drive motor is fixedly installed inside the cleaning drive motor frame, a fixed frame is transmission-connected to the top of the cleaning drive motor, cleaning screw rods are symmetrically installed on both sides of the fixed frame, a sliding block is transmission-installed on one side of the cleaning screw rod, a cleaning brush is fixedly connected to one side of the sliding block, and the cleaning brush fits against the inner wall of the humidifying mechanism.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. When cleaning the humidifying mechanism, the utility model injects alcohol through the liquid filling pipe and starts the cleaning drive motor, which drives the fixed frame to rotate and starts the cleaning screw at the same time. The cleaning screw drives the sliding block to slide upward, and the sliding block drives the cleaning brush to scrub the inner wall of the humidifying mechanism. At the same time, the alcohol can absorb the moisture of the bacterial protein and dehydrate and solidify it, so as to achieve the purpose of killing bacteria, thereby keeping the pipeline and the interior of the humidifying mechanism clean and unobstructed, and solves the problem that the humidifying mechanism in the test chamber converts the liquid into gas through electric heating to increase the humidity in the air. However, this humid environment is the ideal condition for the reproduction of microorganisms such as bacteria and molds. Bacteria can reproduce rapidly in a high humidity environment, especially in the water tank inside the humidifier. Bacteria and other microorganisms may form biofilms, which will affect the normal operation of the humidifier, reduce its humidification performance, and cause the problem of unstable humidity regulation in the drug stability test chamber.

[0015] 2. When the test is not being conducted, after closing the chamber door, power on the electromagnet block to lock the position of the chamber door. Start the blower to blow in air. The air enters the test chamber through the intake pipe. After maintaining a high-pressure state in the test chamber, close the intake pipe valve and the exhaust pipe valve of the test chamber, thereby keeping the test chamber airtight. Detect the air pressure in the test chamber at this time through the pressure sensor. After maintaining this state for a period of time, detect the air pressure again through the pressure sensor. Judge the airtightness of the chamber door based on the pressure difference. When the pressure difference error is greater than the set value, it indicates insufficient airtightness, thus reminding the staff to replace the seal in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the front view of the present utility model;

[0017] Figure 2 is the structural schematic diagram of the present utility model;

[0018] Figure 3 In the present utility model Figure 2 is the partial enlarged view of Area A;

[0019] Figure 4 is the structural schematic diagram of the humidifying mechanism of the present utility model.

[0020] In the figure: 1, test chamber; 2, chamber door; 3, equipment chamber; 4, display module; 5, flat lamp; 6, test chamber; 7, blower; 8, condenser; 9, intake pipe; 10, compressor; 11, evaporator; 12, four-way valve; 13, first stop valve; 14, second stop valve; 15, humidifying mechanism; 16, electromagnet block; 17, liquid adding pipe; 18, liquid adding pipe valve; 19, drain pipe; 20, drain pipe valve; 21, humidifying pipe; 22, humidifying pipe valve; 23, cleaning drive motor bracket; 24, cleaning drive motor; 25, cleaning lead screw; 26, sliding block; 27, cleaning brush; 28, fixing bracket; 29, magnet block; 30, sensor slot; 31, temperature sensor; 32, pressure sensor; 33, humidity sensor; 34, electrode plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0022] Please refer to Figures 1-4, an embodiment provided by the present utility model: a drug stability test chamber, including a test chamber 1, a device chamber 3 is provided at the lower end of the test chamber 1, three test chambers 6 are provided at the middle position of the test chamber 1, and a humidifying mechanism 15 is provided at the middle position inside the device chamber 3. The humidifying mechanism 15 includes a liquid adding pipe 17, a liquid adding pipe valve 18, a liquid discharging pipe 19, a liquid discharging pipe valve 20, a humidifying pipe 21, a humidifying pipe valve 22, a cleaning drive motor bracket 23, a cleaning drive motor 24, a cleaning lead screw 25, a sliding block 26, a cleaning brush 27 and a fixing bracket 28.

[0023] When cleaning the humidifying mechanism 15, alcohol is injected through the liquid adding pipe 17, and the cleaning drive motor 24 is turned on. The cleaning drive motor 24 drives the fixing bracket 28 to rotate. At the same time, the cleaning lead screw 25 is started, and the cleaning lead screw 25 drives the sliding block 26 to slide upward. The sliding block 26 drives the cleaning brush 27 to brush the inner wall of the humidifying mechanism 15. At the same time, alcohol can absorb the moisture of bacterial protein and dehydrate and solidify, so as to achieve the purpose of killing bacteria, thereby keeping the pipes and the interior of the humidifying mechanism 15 clean and unobstructed.

[0024] Please refer to Figures 1-2 , a display module 4 is installed on the front side of the upper end of the test chamber 1. A chamber door 2 is rotatably installed on the front side of the test chamber 6 through a hinge, and a flat lamp 5 is fixedly installed on the inner side of the chamber door 2.

[0025] Please refer to Figures 2-3 , four magnet blocks 29 are symmetrically installed on both sides of the upper and lower ends of the inner side of the chamber door 2. Four electromagnet blocks 16 are symmetrically installed on both sides of the upper and lower ends of the test chamber 6, and the electromagnet blocks 16 are arranged corresponding to the magnet blocks 29. A sensor slot 30 is provided at the middle position of the upper end of the test chamber 6. A temperature sensor 31, a pressure sensor 32 and a humidity sensor 33 are respectively provided inside the sensor slot 30. The temperature sensor 31 is located on one side of the pressure sensor 32, and the humidity sensor 33 is located on the other side of the pressure sensor 32. The lower ends of the temperature sensor 31, the pressure sensor 32 and the humidity sensor 33 all extend to the inside of the test chamber 6.

[0026] Please refer to Figure 2 , the fan 7, the condenser 8, the intake pipe 9, the compressor 10, the evaporator 11, the four-way valve 12, the first stop valve 13 and the second stop valve 14 in the device chamber 3 all belong to the temperature regulation system. A compressor 10 and an evaporator 11 are installed on one side inside the device chamber 3, and the compressor 10 is located in front of the evaporator 11. A fan 7 and a condenser 8 are installed on one side inside the device chamber 3, and the fan 7 is located on one side of the condenser 8. A four-way valve 12 and a first stop valve 13 are installed on one side of the compressor 10 and the evaporator 11, and a second stop valve 14 is installed below the four-way valve 12 and the first stop valve 13.

[0027] Please refer to Figure 2, the air outlet end of the compressor 10 is hermetically connected to the air inlet end of the four-way valve 12 through a connecting pipe. One of the lower connecting ends of the four-way valve 12 is hermetically connected to one end of the first stop valve 13 through a connecting pipe. The other lower connecting end of the four-way valve 12 is hermetically connected to the air inlet end of the compressor 10 through a connecting pipe. The third lower connecting end of the four-way valve 12 is hermetically connected to one end of the condenser 8 through a connecting pipe. The other end of the condenser 8 is hermetically connected to one end of the second stop valve 14 through a connecting pipe. The other end of the second stop valve 14 is hermetically connected to the other end of the first stop valve 13 through a connecting pipe. One side of the condenser 8 is hermetically connected to the inner wall of one end of the test chamber 6 through the inlet pipe 9, and an inlet pipe valve is hermetically installed at the upper end of the inlet pipe 9. The inner wall of the other end of the test chamber 6 is hermetically connected to an exhaust pipe, and an exhaust pipe valve is hermetically installed on one side of the exhaust pipe.

[0028] Please refer to Figure 4 , two electrode plates 34 are symmetrically arranged inside the humidifying mechanism 15. The upper end of the humidifying mechanism 15 is hermetically installed with a humidifying pipe 21, and the upper end of the humidifying pipe 21 is hermetically connected to the inlet pipe 9. The lower end of the inlet pipe 9 is hermetically connected to a humidifying pipe valve 22. One side of the humidifying mechanism 15 is hermetically installed with a liquid adding pipe 17. One end of the liquid adding pipe 17 is hermetically connected to a liquid adding pipe valve 18. The lower end of the liquid adding pipe 17 is hermetically installed with a liquid discharging pipe 19, and the upper end of the liquid discharging pipe 19 is hermetically connected to a liquid discharging pipe valve 20.

[0029] Please refer to Figure 4 , a cleaning drive motor bracket 23 is fixedly installed at the lower end inside the humidifying mechanism 15. A cleaning drive motor 24 is fixedly installed inside the cleaning drive motor bracket 23. A fixed bracket 28 is drivingly connected above the cleaning drive motor 24. Cleaning lead screws 25 are symmetrically installed on both sides of the fixed bracket 28. A sliding block 26 is drivingly installed on one side of the cleaning lead screw 25. A cleaning brush 27 is fixedly connected to one side of the sliding block 26, and the cleaning brush 27 is in contact with the inner wall of the humidifying mechanism 15.

[0030] Working principle: When in use, place the medicine to be tested into the test chamber 6, and then close the door 2 of the test chamber 6. At this time, connect the power supply of the electromagnet block 16, and the electromagnet block 16 adsorbs to the magnet block 29. When performing low-temperature testing, the low-pressure and low-temperature refrigerant vapor in the temperature regulation system is sucked into the compressor 10. At this time, the four-way valve 12 connects the compressor 10 and the condenser 8, and the superheated vapor compressed into high-pressure and high-temperature is discharged into the condenser 8. At the same time, the air sucked by the fan 7 flows through the condenser 8, taking away the heat released by the refrigerant, causing the high-pressure and high-temperature refrigerant vapor to condense into a high-pressure liquid. The high-pressure liquid passes through the throttle capillary to reduce the pressure and temperature and flows into the evaporator 11 through the second stop valve 14, and evaporates at the corresponding low pressure. At the same time, the air is blown by the fan 7 to continuously enter the fins of the evaporator 11 for heat exchange, and the cooled gas after releasing heat is blown into the test chamber 6 through the intake pipe 9. The air circulates in the test chamber 6 to achieve the purpose of reducing the temperature. The heat-exchanged air is discharged through the exhaust pipe. The refrigerant after heat exchange in the evaporator 11 enters through the first stop valve 13, enters through the lower connection end 1 of the four-way valve 12, and then is input into the compressor 10 through the lower connection end 2 of the four-way valve 12 to realize the cycle; during high-temperature testing, the low-pressure and low-temperature refrigerant vapor in the temperature regulation system is sucked into the compressor 10. At this time, the four-way valve 12 connects the compressor 10 and the first stop valve 13, and the superheated vapor compressed into high-pressure and high-temperature passes through the first stop valve 13 and is discharged into the evaporator 11. At the same time, the air is blown by the fan 7 to continuously enter the fins of the evaporator 11 for heat exchange, and the heated gas after absorbing heat is blown into the test chamber 6 through the intake pipe 9. The air circulates in the test chamber 6 to achieve the purpose of reducing the temperature. The refrigerant after heat exchange in the evaporator 11 enters through the second stop valve 14 and enters the inside of the condenser 8 to release heat and condense. The refrigerant after releasing heat enters through the air outlet end 1 of the four-way valve 12, then enters through the lower connection end 3 of the four-way valve 12 and is output through the lower connection end 2 and input into the compressor 10 to realize the cycle. When humidity testing is required, when water enters the humidifying mechanism 15, the water level gradually rises until the water level floods the electrodes in the humidifying mechanism 15.At this time, the electrodes will form a current loop through the water and heat the water to boiling, thereby generating clean steam. The steam enters the intake pipe 9 through the transmission of the humidifying pipe 21 and finally enters the test chamber 6. The temperature sensor 31 and the humidity sensor 33 in the sensor slot 30 detect the temperature and humidity and send them to the control unit. The control unit controls the temperature regulation system and the humidifying mechanism 15 to adjust the temperature and humidity. When no test is being carried out, after closing the cabinet door 2, the power supply of the electromagnet block 16 is turned on to lock the position of the cabinet door 2. The air is blown in by starting the fan 7. The air enters the test chamber 6 through the intake pipe 9. After keeping the test chamber 6 in a high-pressure state, the intake pipe valve and the exhaust pipe valve of the test chamber 6 are closed, so that the test chamber 6 is kept in a sealed state. The air pressure in the test chamber 6 is detected by the air pressure sensor 32. After maintaining this state for a period of time, the air pressure is detected again by the air pressure sensor 32. The airtightness of the cabinet door 2 is judged by the air pressure difference. When the air pressure difference error is greater than the set value, it indicates insufficient airtightness, thus reminding the staff to replace the seal in time. When cleaning the humidifying mechanism 15, alcohol is injected through the liquid adding pipe 17, and the cleaning drive motor 24 is turned on. The cleaning drive motor 24 drives the fixing frame 28 to rotate. At the same time, the cleaning lead screw 25 is started. The cleaning lead screw 25 drives the sliding block 26 to slide upward. The sliding block 26 drives the cleaning brush 27 to brush the inner wall of the humidifying mechanism 15. At the same time, alcohol can absorb the moisture of bacterial proteins and dehydrate and solidify, so as to achieve the purpose of killing bacteria, thus keeping the pipes and the interior of the humidifying mechanism 15 clean and unobstructed.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A drug stability test chamber, comprising a test chamber (1), characterized in that: The lower end of the test box (1) is provided with an equipment chamber (3), three test chambers (6) are opened at the middle position of the test box (1), and a humidifying mechanism (15) is provided at the middle position inside the equipment chamber (3), and the humidifying mechanism (15) comprises a liquid adding pipe (17), a liquid adding pipe valve (18), a liquid drain pipe (19), a liquid drain pipe valve (20), a humidifying pipe (21), a humidifying pipe valve (22), a cleaning drive motor frame (23), a cleaning drive motor (24), a cleaning screw (25), a sliding block (26), a cleaning brush (27) and a fixing frame (28).

2. A drug stability test chamber according to claim 1, characterized in that: A display module (4) is installed on the front side of the upper end of the test box (1), a box door (2) is rotatably installed on the front side of the test chamber (6) via a hinge, and a flat panel light (5) is fixedly installed on the inner side of the box door (2).

3. A drug stability test chamber according to claim 2, characterized in that: Four magnet blocks (29) are symmetrically installed on both sides of the upper and lower ends of the inner side of the box door (2); four electromagnet blocks (16) are symmetrically installed on both sides of the upper and lower ends of the test chamber (6), and the electromagnet blocks (16) and the magnet blocks (29) are arranged correspondingly; a sensor slot (30) is opened at the middle position of the upper end of the test chamber (6); a temperature sensor (31), an air pressure sensor (32) and a humidity sensor (33) are respectively arranged inside the sensor slot (30); the temperature sensor (31) is located on one side of the air pressure sensor (32), and the humidity sensor (33) is located on the other side of the air pressure sensor (32); the lower ends of the temperature sensor (31), the air pressure sensor (32) and the humidity sensor (33) all extend into the interior of the test chamber (6).

4. A drug stability test chamber according to claim 1, characterized in that: A compressor (10) and an evaporator (11) are installed on one side of the interior of the equipment chamber (3), and the compressor (10) is located in front of the evaporator (11). A fan (7) and a condenser (8) are installed on one side of the interior of the equipment chamber (3), and the fan (7) is located on one side of the condenser (8). A four-way valve (12) and a first stop valve (13) are installed on one side of the compressor (10) and the evaporator (11), and a second stop valve (14) is installed below the four-way valve (12) and the first stop valve (13).

5. A drug stability test chamber according to claim 4, characterized in that: The air outlet end of the compressor (10) is sealedly connected to the air inlet end of the four-way valve (12) through a connecting pipe, the air outlet end 1 of the four-way valve (12) is sealedly connected to one end of the first stop valve (13) through a connecting pipe, the air outlet end 2 of the four-way valve (12) is sealedly connected to the air inlet end of the compressor (10) through a connecting pipe, the air outlet end 3 of the four-way valve (12) is sealedly connected to one end of the condenser (8) through a connecting pipe, the other end of the condenser (8) is sealedly connected to one end of the second stop valve (14) through a connecting pipe, the other end of the second stop valve (14) is sealedly connected to the other end of the first stop valve (13) through a connecting pipe, one side of the condenser (8) is sealedly connected to the inner wall of one end of the test chamber (6) through an air inlet pipe (9), and an air inlet pipe valve is sealedly installed on the upper end of the air inlet pipe (9), the inner wall of the other end of the test chamber (6) is sealedly connected to an exhaust pipe, and an exhaust pipe valve is sealedly installed on one side of the exhaust pipe.

6. A drug stability test chamber according to claim 1, characterized in that: Two electrode sheets (34) are symmetrically arranged inside the humidifying mechanism (15); a humidifying tube (21) is sealedly installed at the upper end of the humidifying mechanism (15), and the upper end of the humidifying tube (21) is sealedly connected to the air inlet pipe (9); the lower end of the air inlet pipe (9) is sealedly connected to the humidifying tube valve (22); a liquid adding tube (17) is sealedly installed on one side of the humidifying mechanism (15); one end of the liquid adding tube (17) is sealedly connected to the liquid adding tube valve (18); a liquid draining tube (19) is sealedly installed at the lower end of the liquid adding tube (17), and the upper end of the liquid draining tube (19) is sealedly connected to the liquid draining tube valve (20).

7. A drug stability test chamber according to claim 1, characterized in that: A cleaning drive motor frame (23) is fixedly mounted at the lower end of the interior of the humidifying mechanism (15); a cleaning drive motor (24) is fixedly mounted inside the cleaning drive motor frame (23); a fixing frame (28) is drivingly connected to the top of the cleaning drive motor (24); cleaning screw rods (25) are symmetrically mounted on both sides of the fixing frame (28); a sliding block (26) is drivingly mounted on one side of the cleaning screw rod (25); a cleaning brush (27) is fixedly connected to one side of the sliding block (26); and the cleaning brush (27) is in contact with the inner wall of the humidifying mechanism (15).

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