Biological sample storage system and pressure control system

Abstract

According to the biological sample storage system and the pressure control system, in consideration of the fact that a user needs to open a heat preservation door before sampling, the opening state of the heat preservation door is monitored through an induction module, a trigger signal that the heat preservation door is opened or the heat preservation door is pre-judged to be opened is inducted, and a first signal is immediately sent to a control system; the control system immediately starts the cold dry gas supply device, so that the air pressure in the storage chamber is not lower than the air pressure of the external air when the thermal insulation door is opened, the interior of the storage chamber reaches a micro-positive pressure state, the external air with higher humidity and temperature is prevented from being injected into the storage chamber, and the stable environment in the storage chamber in the sampling process is ensured; the preservation of biological samples is facilitated.

Description

[0001] This application claims priority to patent application number 202410176757X, filing date February 8, 2024, and patent name “Sampling door panel, biological sample storage system and pressure control method thereof”. Technical Field

[0002] The present application relates to the technical field of biological sample storage, and in particular to a biological sample storage system and a pressure control system. Background Art

[0003] When sampling from the existing manual sampling biological sample storage system, it is necessary to open the insulation door of the storage room. Since the temperature in the storage room is relatively low, the low temperature causes the pressure to be lower than the external atmospheric pressure. This pressure difference between the inside and outside will cause air with higher humidity and temperature to be poured into the storage room, causing the temperature and humidity in the storage room to change, destroying the stable environment in the storage room, and having an adverse effect on the preservation of biological samples. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a biological sample storage system and a pressure control system to solve the problem in existing biological sample storage systems that, during the sampling process, there is a pressure difference between the inside and the outside, which causes air with high humidity and temperature to be poured into the storage chamber, causing the temperature and humidity in the storage chamber to change, destroying the stable environment in the storage chamber, and having an adverse effect on the preservation of biological samples.

[0005] A biological sample storage system provided in an embodiment of the present application includes a heat preservation door and a shell, wherein the heat preservation door is openably arranged on the shell, and the shell includes a storage chamber for placing biological samples;

[0006] The system also includes a control system, a sensing module and a cold and dry gas supply device;

[0007] The sensing module is used to detect the trigger signal when the user opens the door or intends to open the door, and send a first signal to the control system; wherein the first signal is used to indicate to turn on the cold dry gas supply device;

[0008] The control system is used to receive the first signal and control the cold and dry gas supply device to start according to the first signal;

[0009] When the cold and dry gas supply device is turned on, the cold and dry gas is filled into the storage chamber.

[0010] In the above technical solution, considering that the user needs to open the insulation door before sampling, this embodiment monitors the opening state of the insulation door through the sensing module. When it senses that the insulation door is opened or predicts that the trigger signal is about to be opened, it will immediately send a first signal to the control system. The control system then starts the cold dry gas providing device. This can ensure that when the insulation door is opened, the air pressure in the storage chamber is not lower than the air pressure of the outside air, so that the inside of the storage chamber reaches a slightly positive pressure state, avoiding the outside air with higher humidity and temperature from entering the storage chamber, ensuring a stable environment in the storage chamber during the sampling process, which is conducive to the preservation of biological samples.

[0011] In some optional embodiments, the sensing module includes a door opening detection device, and the door opening detection device is used to monitor a first trigger signal when the thermal insulation door is opened, and send a first signal to the control system.

[0012] In the above technical solution, the door opening detection device can be a simple mechanical switch. When the thermal insulation door is opened, the mechanical switch is triggered, thereby sending a first signal to the control system. Alternatively, it can also be a more advanced electronic sensor, such as an infrared sensor or a magnetic sensor, which can more accurately monitor the opening state of the thermal insulation door. The door opening detection device can accurately monitor the opening state of the thermal insulation door, avoiding system maloperation caused by misjudgment or missed judgment. Once the thermal insulation door is opened, the door opening detection device can immediately send a signal to the control system, and the control system will immediately respond to start the cold dry gas supply device. This immediate response ensures that the samples in the storage chamber reach a slightly positive pressure state before being exposed to the external environment.

[0013] In some optional embodiments, the door opening detection device includes a travel switch; the travel switch is arranged on the edge of the thermal insulation door or the edge of the door frame.

[0014] In the above technical solution, the door opening detection device adopts a travel switch, which is a mechanical switch that triggers its open and closed state by the movement of the thermal insulation door. Specifically, the travel switch can be set at the edge of the thermal insulation door or the edge of the door frame. When the thermal insulation door is opened or closed, it will come into contact or lose contact with the travel switch, thereby changing its electrical signal state. The use of the travel switch in this embodiment can bring the following advantages: the travel switch has a simple structure and does not require complex circuits or sensors, so it has high reliability and stability, and because the manufacturing and maintenance costs of the travel switch are relatively low, the use of this switch can reduce the cost of the entire biological sample storage system.

[0015] In some optional embodiments, the door opening detection device includes a magnetic sensor; the magnetic sensor is arranged on the edge of the thermal insulation door or the edge of the door frame, and a magnet is arranged at a relative position of the magnetic sensor.

[0016] In the above technical solution, the door opening detection device adopts a magnetic sensor, which is a device that can sense changes in the magnetic field and has high precision and high reliability. In this embodiment, the magnetic sensor is set at the edge of the thermal insulation door or the edge of the door frame, and at the same time, a magnet is set at the relative position of the magnetic sensor, for example, the magnetic sensor is set on the thermal insulation door, and the magnet is set at the position corresponding to the magnetic sensor on the door frame, or the magnet is set on the thermal insulation door, and the magnetic sensor is set at the position corresponding to the magnet on the door frame. When the thermal insulation door is closed, the magnetic field of the magnet will trigger the magnetic sensor, so that it can sense the change of the magnetic field. Once this change is sensed, the magnetic sensor will immediately send a first signal to the control system. This signal transmission method is fast and accurate, ensuring that the control system can receive information about the door opening status in time. The magnetic sensor includes a Hall effect sensor, a magnetoresistive sensor, a permanent magnetic sensor, etc. The use of the magnetic sensor in this embodiment can bring the following advantages: the magnetic sensor can accurately sense the change of the magnetic field, so it has a high sensitivity. This means that even if the thermal insulation door is only slightly opened, the magnetic sensor can accurately detect it. Moreover, since the magnetic sensor and the magnet interact through the magnetic field, there is no actual physical contact between them, which avoids wear and failure caused by long-term friction, greatly prolongs the service life and reduces the frequency of maintenance and replacement.

[0017] In some optional embodiments, the door opening detection device includes a pressure sensor, and the pressure sensor is arranged at the edge of the thermal insulation door or the edge of the door frame, and at the position where the thermal insulation door and the door frame are in contact.

[0018] In the above technical solution, the door opening detection device uses a pressure sensor. A pressure sensor is a device that can sense pressure changes. When subjected to external force, its resistance value or output voltage will change. The use of a pressure sensor in this embodiment can bring the following advantages: the pressure sensor directly senses the contact pressure between the thermal insulation door and the door frame, so the detection result is intuitive and accurate.

[0019] Specifically, pressure sensors include piezoresistive, capacitive, inductive and piezoelectric. Among them, piezoresistive pressure sensors are made using the piezoresistive effect of single crystal silicon materials and integrated circuit technology. They have the advantages of high sensitivity, high precision and wide measurement range, but are easily affected by temperature and need to take temperature compensation measures. Capacitive pressure sensors convert pressure into capacitance and measure pressure by measuring changes in capacitance. They have the advantages of high resolution, good stability and long life, but are easily affected by temperature and humidity, and need to take corresponding compensation measures. Inductive pressure sensors use the principle of electromagnetic induction to convert pressure into inductance. They have the advantages of wide measurement range, strong anti-interference ability and high stability, but are large in size and are not suitable for miniaturized applications. Piezoelectric pressure sensors use the principle of piezoelectric effect to convert pressure into electrical energy. They have the advantages of high sensitivity, fast response speed and small size, but the output signal is small and amplification measures need to be taken.

[0020] In some optional embodiments, the sensing module includes a human body detection device, which is used to monitor the second trigger signal when there is a person or an object in front of the thermal insulation door, and send the first signal to the control system.

[0021] In the above technical solution, considering that it takes a certain response time for the cold and dry gas supply device to be turned on to form a micro-positive pressure environment in the storage room, the sensing module of this embodiment uses the human body detection device to detect whether there is a person before the thermal insulation door is actually opened. If the presence of a person is detected, it is predicted that a sampling operation may be performed later, and the cold and dry gas supply device is turned on in advance, so that a micro-positive pressure environment has been formed in the storage room when sampling. Specifically, the human body detection device usually includes an infrared sensor or a radar sensor, which can transmit and receive signals, and judge whether there is a person in front of the thermal insulation door by analyzing the change of the signal. When a human body is detected, the sensor will immediately send a first signal to the control system.

[0022] In some optional embodiments, the human body detection device includes an infrared sensor, which is used to emit infrared rays, detect the second trigger signal when the infrared rays are blocked or reflected, and send the first signal to the control system.

[0023] In the above technical solution, the infrared sensor will actively send infrared rays. When the infrared rays encounter an object (such as a human body), they will be reflected or blocked. The infrared sensor determines whether there is a human body in front of the thermal insulation door by detecting these reflected or blocked infrared rays. When it is detected that the infrared rays are blocked or reflected, the infrared sensor will immediately send a first signal to the control system. The use of infrared sensors in this embodiment can bring the following advantages: the infrared sensor can quickly detect the presence of a human body and send a signal to the control system in a short time to ensure a timely response of the system. The infrared sensor has a certain anti-interference ability to changes in light and other interference factors, and can work stably in complex environments. By setting the angle at which the infrared sensor emits infrared rays, it is possible to detect whether there is a person in a specific area, so as to more accurately predict the sampling action.

[0024] In some optional embodiments, the human body detection device includes a microwave radar sensor, which is used to emit multiple signal waves outward using microwaves, detect the second trigger signal when the signal wave is about to be bounced back, and send the first signal to the control system.

[0025] In the above technical solution, the microwave signal wave emitted by the microwave radar sensor will be reflected back when it encounters an object (such as a human body). By receiving and analyzing these reflected signal waves, the sensor can accurately determine whether there is a human body in front of the thermal insulation door. When it is detected that the signal wave is bounced back, the microwave radar sensor will immediately send a first signal to the control system. The use of microwave radar sensors in this embodiment can bring the following advantages: the microwave radar sensor can penetrate some non-metallic materials (such as clothing, glass, etc.), making the detection more accurate and reliable. The microwave radar sensor has strong adaptability to light changes and environmental interference, and can work stably in different scenarios. The microwave radar sensor has a longer detection distance and a wider detection range, and can cover a larger area in front of the thermal insulation door.

[0026] In some optional embodiments, the sensing module includes a pre-door opening detection module, which is arranged at the door opening position of the thermal insulation door. The pre-door opening detection module is used to monitor the third trigger signal when the door opening position is touched and send a first signal to the control system.

[0027] In the above technical solution, the sensing module includes a pre-door opening detection module, which is installed at the door opening position of the thermal insulation door and can accurately detect whether the door opening position is touched. The pre-door opening detection module can be implemented using a variety of technologies, such as pressure sensors, capacitive sensors or infrared sensors. When someone holds the door opening position, these sensors can detect corresponding changes (such as physical buttons, pressure changes, capacitance changes or infrared blocking), thereby determining that the door opening position is touched. Once it is detected that the door opening position is touched, the pre-door opening detection module will immediately send a first signal to the control system.

[0028] In some optional embodiments, the pre-door opening detection module includes a key switch, and the key switch is used to monitor the third trigger signal when a button is pressed and send the first signal to the control system.

[0029] In the above technical solution, a push switch is set at the opening position of the thermal insulation door. When the user holds the door opening position, he also presses the button of the push switch at the door opening position to close the switch and form an electrical signal, which is then sent to the control system.

[0030] More preferably, the key switch can be a switch with a mechanical locking function. When the button is pressed for the first time, the switch is turned on and remains in a self-locking state. Even if the button is released, the switch remains in a closed state. When the button is pressed again, the switch is disconnected and the button pops out. In this embodiment, when the user opens the thermal insulation door when holding the door opening position for the first time, the key switch is turned on and remains in a self-locking state. During the sampling process after the user opens the thermal insulation door, the control system continues to receive the first signal, and the cold dry gas providing device continues to be turned on. After the user completes the sampling, when the thermal insulation door is closed for the second time by holding the door opening position, the key switch is disconnected, the button automatically pops out, and the cold dry gas providing device is turned off. If the user does not touch the key switch when closing the thermal insulation door, and the cold dry gas providing device is not turned off, the user can press the key switch again to turn off the cold dry gas providing device.

[0031] The key switch can also be a switch without a mechanical locking function. When the button is pressed, the control system receives a first signal sent by the key switch. When the button is released, the control system does not receive the first signal. If the control system does not receive the first signal within a certain period of time, the cold and dry gas supply device is controlled to be turned off. When the user is taking samples, he holds the door opening position and pulls open the insulation door while pressing the button. The control system receives the first signal sent by the key switch, and the control system controls the cold and dry gas supply device to be turned on according to the first signal. After the insulation door is opened, the button is released, and the key switch no longer sends the first signal. At the same time, the insulation door is detected to be opened by the door opening detection device. The door opening detection device sends a first signal to the control system, and the control system still controls the cold and dry gas supply device to be turned on. If the insulation door is not opened, the button is released, and the control system does not receive the first signal within a certain period of time, the cold and dry gas supply device is controlled to be turned off.

[0032] In some optional embodiments, the pre-door opening detection module includes a touch sensing sensor, which is used to detect a third trigger signal when the touch area is touched and send a first signal to the control system.

[0033] In the above technical solution, when sampling, the user needs to first hold the door opening position to open the insulation door, and set a touch sensing sensor in the touch area where the hand touches the door opening position. Touch sensing sensors usually work based on capacitance or resistance principles. When the user's finger or other object touches the touch area of ​​the sensor, the capacitance or resistance value of the sensor will change, thereby generating a first signal, and the first signal is sent to the control system, and the control system controls the cold dry gas providing device to turn on according to the first signal. The use of a touch sensing sensor in this embodiment can bring the following advantages: the touch sensing sensor has high sensitivity and can accurately detect slight touch actions. In addition, the touch sensing sensor can be designed to coordinate with the appearance of the door opening position, without the need to set a raised button, thereby improving the user experience.

[0034] When the user is taking samples, while holding the door opening position to open the thermal insulation door, the touch sensing sensor detects the third trigger signal and sends the first signal to the control system. The control system receives the first signal sent by the touch sensing sensor, and the control system controls the cold dry gas supply device to open according to the first signal. After the thermal insulation door is opened, the user's hand leaves the door opening position, and the touch sensing sensor no longer sends the first signal to the control system. At the same time, the thermal insulation door is detected to be opened by the door opening detection device, and the door opening detection device sends the first signal to the control system. The control system still controls the cold dry gas supply device to open. If the thermal insulation door is not opened, the touch sensing sensor cannot detect the third trigger signal, and the control system cannot receive the first signal within a certain period of time, then the cold dry gas supply device is controlled to be closed.

[0035] In some optional embodiments, the touch sensing sensor includes a capacitive tactile sensor, a piezoresistive tactile sensor, or an optical tactile sensor.

[0036] Among them, the capacitive touch sensor is a sensor that can sense changes in external pressure or contact state. Its working principle is to sense changes in external pressure or contact state by measuring changes in capacitance between capacitor plates. Capacitive touch sensors usually consist of two electrodes, one of which is fixed and the other is movable. When external pressure acts on the movable electrode, the distance between the two electrodes changes, resulting in changes in capacitance. Capacitive touch sensors have the advantages of simple structure, high sensitivity, fast response speed, and wide dynamic range.

[0037] Piezoresistive tactile sensors are sensors based on the piezoresistive effect. Their working principle is to sense changes in external pressure or deformation by measuring changes in the resistance value of the material. Piezoresistive tactile sensors are usually made of materials with piezoresistive effect, such as semiconductor materials such as silicon and germanium. When external pressure acts on the sensor, the resistance value of the material will change. By measuring the change in resistance value, the magnitude of external pressure or deformation can be sensed. Piezoresistive tactile sensors have the advantages of high sensitivity, fast response speed, wide measurement range, and good stability.

[0038] An optical tactile sensor is a tactile sensor based on optical principles. Its working principle is usually to sense the shape, size, position and other information of external objects by measuring the reflection or scattering of light on the surface of the object. An optical tactile sensor usually includes a light source, an optical system, a photoelectric conversion device and other parts. When an external object contacts the sensor surface, it will cause reflection or scattering of light. By measuring the changes in the reflected or scattered light, the information of the external object can be sensed. Optical tactile sensors have the advantages of non-contact measurement, high resolution, and high sensitivity.

[0039] In some optional embodiments, it further includes a first gas pressure sensor, which is disposed in the storage chamber;

[0040] A first gas pressure sensor is connected to the control system, and the first gas pressure sensor is used to monitor a first gas pressure in the storage chamber and send the first gas pressure to the control system;

[0041] The control system is used to control the cold and dry gas providing device to turn on when the first air pressure is lower than a first preset pressure value; and to control the cold and dry gas providing device to turn off when the first air pressure is higher than a second preset pressure value; wherein the first preset pressure value is smaller than the second preset pressure value.

[0042] In the above technical solution, in order to maintain the stability of the ambient gas pressure in the storage room, a first gas pressure sensor is provided in the storage room. The first gas pressure sensor monitors the first air pressure in the storage room based on the principle of piezoresistive effect or piezoelectric effect, and the control system controls the opening and closing of the cold and dry gas providing device according to the first air pressure. In a specific embodiment, the opening and closing of the cold and dry gas providing device is controlled according to the first air pressure. This control logic has a higher priority. For example, when the sensing module detects the trigger signal and sends the first signal to the control, the control system receives the first signal. If the control system simultaneously detects that the first air pressure is higher than the second preset pressure value, the control system controls the cold and dry gas providing device to be closed according to the first air pressure being higher than the second preset pressure value. For another example, if the control system does not receive the first signal sent by the sensing module, and at the same time, the control system detects that the first air pressure is lower than the first preset pressure value, the control system controls the cold and dry gas providing device to be turned on.

[0043] In some optional embodiments, the cold and dry gas providing device includes a cold dryer and a gas storage tank;

[0044] The cold dryer is used to prepare cold dry gas, and transport the prepared cold dry gas to the gas storage tank through the air inlet channel of the gas storage tank for storage;

[0045] The gas outlet channel of the gas storage tank is connected to the storage chamber, and a solenoid valve is arranged on the gas outlet channel; the solenoid valve is connected to the control system, and when the solenoid valve is opened, the cold and dry gas in the gas storage tank is transported to the storage chamber through the gas outlet channel.

[0046] In the above technical solution, cold dry gas is prepared by a cold dryer, and the prepared cold dry gas is transported to a gas tank for storage. The cold dry gas pressure in the gas tank is relatively high. When it is necessary to fill the storage chamber with cold dry gas, it is only necessary to open the solenoid valve of the gas tank outlet channel to send the pre-prepared cold dry gas into the storage chamber, thereby improving the response speed of the system.

[0047] In some optional embodiments, a second gas pressure sensor is provided in the gas storage tank;

[0048] The second gas pressure sensor is connected to the control module of the cold dryer, and the second gas pressure sensor is used to monitor the second gas pressure in the gas storage tank and send the second gas pressure to the control system;

[0049] The control system is used to control the cold dryer to turn on when the second air pressure is lower than the third preset pressure value; and to control the cold dryer to turn off when the second air pressure is higher than the fourth preset pressure value; wherein the third preset pressure value is greater than the second preset pressure value, and the fourth preset pressure value is greater than the third preset pressure value.

[0050] In the above technical solution, a second gas pressure sensor is added inside the gas tank. The second gas pressure sensor monitors the gas pressure in the gas tank, i.e., the second air pressure, based on the principle of piezoresistive effect or piezoelectric effect, and sends this data to the control module of the cold dryer in real time. The control module of the cold dryer accurately controls the operation of the cold dryer according to the second air pressure to ensure that the air pressure in the gas tank is always maintained within a suitable range. Specifically, when the second air pressure in the gas tank is lower than the third preset pressure value, the control module will immediately start the cold dryer, start preparing cold dry gas and inject it into the gas tank to restore the air pressure to an appropriate range. When the second air pressure is higher than the fourth preset pressure value, the control module will control the cold dryer to shut down to prevent the air pressure in the gas tank from being too high.

[0051] It should be noted here that the air pressure in the gas tank should always be greater than the air pressure in the storage room to ensure that when the gas tank delivers cold and dry gas to the storage room, the air pressure in the gas tank can still meet the demand.

[0052] In some optional embodiments, a robotic arm is further included; the robotic arm is used to take out the sample when the thermal insulation door is open.

[0053] In the above technical solution, the mechanical arm can be arranged in the storage room, and after the thermal insulation door is opened, the mechanical arm takes out the sample in the storage room. The mechanical arm can also be arranged outside the storage room, and after the thermal insulation door is opened, the mechanical arm extends into the storage room to perform sampling operations.

[0054] In some optional embodiments, a robot arm working cabin is further included; the robot arm working cabin is used to accommodate the robot arm, and the robot arm working cabin is separated from the storage room by an insulation door.

[0055] In the above technical solution, the robotic arm is arranged in a robotic arm working cabin outside the storage room. When the thermal insulation door is closed, the robotic arm working cabin and the storage room are not connected; when the thermal insulation door is opened, the robotic arm working cabin and the storage room are connected, and the robotic arm can be extended into the storage room to perform sampling operations.

[0056] In some optional embodiments, a third gas pressure sensor is provided in the working cabin of the robot arm;

[0057] The third gas pressure sensor is connected to the control system, and the third gas pressure sensor is used to monitor the third gas pressure in the working cabin of the manipulator and send the third gas pressure to the control system;

[0058] The control system is used to control the cold and dry gas providing device to turn on when the third air pressure is lower than the fifth preset pressure value; and to control the cold and dry gas providing device to turn off when the third air pressure is higher than the sixth preset pressure value; wherein the fifth preset pressure value is smaller than the sixth preset pressure value, and the sixth preset pressure value is smaller than the first preset pressure value.

[0059] In the above technical solution, the third air pressure in the manipulator working cabin is monitored by the third gas pressure sensor, and the control system controls the air pressure in the manipulator working cabin within a suitable range according to the third air pressure, that is, the third air pressure in the manipulator working cabin should be lower than the first air pressure in the storage room to prevent the air in the manipulator working cabin from entering the storage room when the insulation door is opened. In addition, the third air pressure in the manipulator working cabin should be higher than the external atmospheric pressure to prevent the external air from entering the manipulator working cabin when the door of the manipulator working cabin is opened.

[0060] In some optional embodiments, a sampling door panel is further included; the sampling door panel and the shell form a storage chamber for placing biological samples, and the sampling door panel is covered when the thermal insulation door is closed.

[0061] In the above technical solution, when the thermal insulation door is opened, the sampling door panel is provided to still separate the storage room interior and exterior space, thereby reducing the air exchange between the interior and exterior of the storage room during the sampling process.

[0062] In some optional embodiments, the sampling door plate includes a plate body and a transfer device arranged on the plate body, and the transfer device has an open state and a closed state; when the transfer device is in the open state, the sampling channel on one side of the plate body is connected with the sampling channel on the other side of the plate body; when the transfer device is in the closed state, the space on both sides of the plate body is completely separated by the sampling door plate.

[0063] In the above technical solution, sampling is performed through the transfer device arranged on the sampling door panel. When the transfer device is closed, there is no communication channel between the storage chamber and the atmospheric environment. Only when the transfer device is opened, there is a communication channel between the storage chamber and the atmospheric environment. The communication channel is small, which can effectively reduce the air exchange between the inside and outside of the storage chamber during the sampling process, ensure the stable environment in the storage chamber during the sampling process, and is conducive to the preservation of biological samples.

[0064] In some optional embodiments, the transfer device includes at least one layer of elastic diaphragm, and each layer of the diaphragm includes a plurality of elastic parts arranged along the circumferential direction. When the elastic part is supported by the sampling device, the elastic part is deformed to put the transfer device in an open state; when the elastic part is reset, the transfer device is in a closed state.

[0065] A pressure control system provided in an embodiment of the present application includes a control system, a sensing module and a cold dry gas providing device;

[0066] The sensing module is used to detect the trigger signal when the user opens the door or intends to open the door, and send a first signal to the control system; wherein the first signal is used to indicate to turn on the cold dry gas supply device;

[0067] The control system is used to control the cold and dry gas supply device to start when receiving the first signal;

[0068] When the cold and dry gas supply device is turned on, the cold and dry gas is filled into the storage chamber.

[0069] The pressure control system of the above technical solution can be applied to various fields in addition to the above biological sample storage system, such as:

[0070] In the field of precision instruments, some precision instruments and components need to be tested and stored under strictly controlled environmental conditions. This pressure control system can provide the required low-temperature dry environment.

[0071] In the medical field, medical facilities such as operating rooms, laboratories and pharmacies often need to maintain a constant low temperature and dry environment to prevent infection or drug failure. This pressure control system can ensure that the air in the storage room or equipment is always kept at a low temperature and dry.

[0072] In the field of food and beverage processing, it is essential to keep the production environment cool and dry during food and beverage production to ensure product quality and safety. The system can be used in storage rooms, production lines or packaging processes to ensure that products are not affected by high temperature and humidity during processing and storage.

[0073] In the field of cultural relics protection, precious cultural relics and artworks need to be kept in a constant low temperature and dry environment to prevent decay, mildew or damage. This pressure control system can be used in the storage rooms of museums, libraries and archives.

[0074] In the field of research experiments, scientific laboratories often need to precisely control environmental conditions to conduct various experiments and research. This pressure control system can provide a stable low-temperature dry environment for the laboratory to ensure the accuracy of the experimental results.

[0075] In some optional embodiments, it further includes a first gas pressure sensor, which is disposed in the storage chamber;

[0076] A first gas pressure sensor is connected to the control system, and the first gas pressure sensor is used to monitor a first gas pressure in the storage chamber and send the first gas pressure to the control system;

[0077] The control system is used to control the cold and dry gas providing device to turn on when the first air pressure is lower than a first preset pressure value; and to control the cold and dry gas providing device to turn off when the first air pressure is higher than a second preset pressure value; wherein the first preset pressure value is smaller than the second preset pressure value.

[0078] In some optional embodiments, the cold and dry gas providing device includes a cold dryer and a gas storage tank;

[0079] The cold dryer is used to prepare cold dry gas, and transport the prepared cold dry gas to the gas storage tank through the air inlet channel of the gas storage tank for storage;

[0080] The gas outlet channel of the gas storage tank is connected to the storage chamber, and a solenoid valve is arranged on the gas outlet channel; the solenoid valve is connected to the control system, and when the solenoid valve is opened, the cold and dry gas in the gas storage tank is transported to the storage chamber through the gas outlet channel.

[0081] In some optional embodiments, a second gas pressure sensor is further included, and the second gas pressure sensor is disposed in the gas storage tank;

[0082] The second gas pressure sensor is connected to the control module of the cold dryer, and the second gas pressure sensor is used to monitor the second gas pressure in the gas storage tank and send the second gas pressure to the control system;

[0083] The control system is used to control the cold dryer to turn on when the second air pressure is lower than the third preset pressure value; and to control the cold dryer to turn off when the second air pressure is higher than the fourth preset pressure value; wherein the third preset pressure value is greater than the second preset pressure value, and the fourth preset pressure value is greater than the third preset pressure value.

[0084] In some optional embodiments, a robotic arm is further included, which is connected to a control system; the robotic arm is used to take out samples when the thermal insulation door is open.

[0085] In some optional embodiments, the robot arm is disposed in a robot arm working cabin, and a third gas pressure sensor is disposed in the robot arm working cabin;

[0086] The third gas pressure sensor is connected to the control system, and the third gas pressure sensor is used to monitor the third gas pressure in the working cabin of the manipulator and send the third gas pressure to the control system;

[0087] The control system is used to control the cold and dry gas providing device to turn on when the third air pressure is lower than the fifth preset pressure value; and to control the cold and dry gas providing device to turn off when the third air pressure is higher than the sixth preset pressure value; wherein the fifth preset pressure value is smaller than the sixth preset pressure value, and the sixth preset pressure value is smaller than the first preset pressure value. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0089] Figure 1 A functional module diagram of a pressure control system provided in the first embodiment of the present application;

[0090] Figure 2 A functional module diagram of a pressure control system provided in the second embodiment of the present application;

[0091] Figure 3 A functional module diagram of a pressure control system provided in the third embodiment of the present application;

[0092] Figure 4 A functional module diagram of a pressure control system provided in the fourth embodiment of the present application;

[0093] Figure 5 A schematic diagram of the structure of a biological sample storage system provided in the fifth embodiment of the present application;

[0094] Figure 6A functional module diagram of a biological sample storage system provided in the sixth embodiment of the present application;

[0095] Figure 7 A functional module diagram of a biological sample storage system provided in the seventh embodiment of the present application;

[0096] Figure 8 A functional module diagram of a biological sample storage system provided in the eighth embodiment of the present application;

[0097] Fig. 9 A functional module diagram of a biological sample storage system provided in the ninth embodiment of the present application;

[0098] Fig.10 A functional module diagram of a biological sample storage system provided in the tenth embodiment of the present application;

[0099] Fig.11 A functional module diagram of a biological sample storage system provided in the eleventh embodiment of the present application;

[0100] Fig.12 A functional module diagram of a biological sample storage system provided in the twelfth embodiment of the present application;

[0101] Fig.13 A schematic diagram of the structure of a biological sample storage system provided in the thirteenth embodiment of the present application;

[0102] Fig.14 This is a schematic structural diagram of a biological sample storage system provided in the fourteenth embodiment of the present application.

[0103] Icons: 1-sensing module, 11-door opening detection device, 12-human body detection device, 13-pre-door opening detection module, 2-control system, 3-cold and dry gas providing device, 31-solenoid valve, 32-cold and dry machine, 321-control module, 4-first gas pressure sensor, 5-second gas pressure sensor, 6-hinge structure, 7-door opening position, 81-insulation door, 82-sampling door panel, 821-transfer device, 83-robotic arm working cabin, 831-robotic arm, 84-storage chamber, 8211-elastic part, 91-top of shell panel, 92-bottom of shell panel. DETAILED DESCRIPTION

[0104] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0105] In a biological sample storage system, since the preservation of biological samples requires a strict low-temperature and low-humidity environment, a sampling channel with a smaller channel is usually set up. People reach into the storage chamber through the sampling channel to take away the biological sample. However, in this process, air exchange at both ends of the sampling channel is still inevitable, that is, the low-temperature and low-humidity gas in the storage chamber is exchanged with the gas in the external space environment. The higher temperature and higher humidity air in the external space environment enters the storage chamber, which will destroy the stable environment in the storage chamber. The applicant also found that since the ambient temperature in the storage chamber is relatively low, the air pressure in the storage chamber is also relatively low. Once the sampling channel is connected, external air will be poured into the storage chamber. Therefore, one or more embodiments of the present application provide a biological sample storage system and a pressure control system to solve the above problems.

[0106] First, for the convenience of description, the pressure control system of the present application is introduced first. Figure 1 , Figure 1 This is a functional module diagram of the pressure control system provided in the first embodiment of the present application. The pressure control system of this embodiment includes a control system 2, a sensing module 1 and a cold dry gas providing device 3.

[0107] Among them, the sensing module 1 is used to monitor the trigger signal when the user opens the door or intends to open the door, and send a first signal to the control system 2; wherein the first signal is used to indicate to turn on the cold and dry gas providing device 3; the control system 2 is used to control the cold and dry gas providing device 3 to turn on when receiving the first signal; when the cold and dry gas providing device 3 is turned on, cold and dry gas is filled into the storage chamber, wherein the cold and dry gas can be air, nitrogen, etc.

[0108] Specifically, the sensing module 1 can sense the opening and closing of the heat preservation door 81, can sense whether there is a person preparing to take a sample in front of the heat preservation door 81, and can sense whether there is a pressure difference between the inside and outside of the storage room, which will cause the outside air to flow in when the heat preservation door 81 is opened. The cold dry gas providing device 3 can be a cold dryer 32 for preparing cold dry gas, or a storage tank storing cold dry gas. The control system can specifically be a control chip, a controller or a processor.

[0109] Please refer to Figure 2 , Figure 2The functional module diagram of the pressure control system provided for the second embodiment of the present application is different from that of the first embodiment in that: the pressure control system also includes a first gas pressure sensor 4. During installation, the first gas pressure sensor 4 is arranged in the storage chamber. The first gas pressure sensor 4 is connected to the control system 2, and the first gas pressure sensor 4 is used to monitor the first air pressure in the storage chamber and send the first air pressure to the control system 2. The control system 2 is used to control the cold and dry gas providing device 3 to turn on when the first air pressure is lower than the first preset pressure value; and to control the cold and dry gas providing device 3 to turn off when the first air pressure is higher than the second preset pressure value; wherein the first preset pressure value is less than the second preset pressure value.

[0110] Please refer to Figure 3 , Figure 3 The functional module diagram of the pressure control system provided for the third embodiment of the present application is different from that of the second embodiment in that the cold and dry gas providing device 3 of this embodiment includes a cold dryer 32 and a gas storage tank.

[0111] Among them, the cold dryer 32 is used to prepare cold dry gas, and transport the prepared cold dry gas to the gas tank through the air inlet channel of the gas tank for storage; the air outlet channel of the gas tank is connected to the storage chamber, and a solenoid valve 31 is provided on the air outlet channel; the solenoid valve 31 is connected to the control system 2, and when the solenoid valve 31 is opened, the cold dry gas in the gas tank is transported to the storage chamber through the air outlet channel.

[0112] Please refer to Figure 4 , Figure 4 The functional module diagram of the pressure control system provided for the fourth embodiment of the present application is different from that of the third embodiment in that: the pressure control system of this embodiment also includes a second gas pressure sensor 5. During installation, the second gas pressure sensor 5 is arranged in the gas storage tank, and the second gas pressure sensor 5 is connected to the control module 321 of the cold dryer 32. The second gas pressure sensor 5 is used to monitor the second air pressure in the gas storage tank and send the second air pressure to the control system 2; the control system 2 is used to control the cold dryer 32 to turn on when the second air pressure is lower than the third preset pressure value; and to control the cold dryer 32 to turn off when the second air pressure is higher than the fourth preset pressure value; wherein the third preset pressure value is greater than the second preset pressure value, and the fourth preset pressure value is greater than the third preset pressure value.

[0113] In some optional embodiments, a robotic arm 831 is further included, and the robotic arm 831 is connected to the control system 2; the robotic arm 831 is used to take out the sample when the thermal insulation door is opened.

[0114] In some optional embodiments, the robot arm 831 is disposed in the robot arm working cabin 83, and a third gas pressure sensor is disposed in the robot arm working cabin 83; the third gas pressure sensor is connected to the control system 2, and the third gas pressure sensor is used to monitor the third air pressure in the robot arm working cabin 83, and send the third air pressure to the control system 2; the control system 2 is used to control the cold and dry gas providing device 3 to turn on when the third air pressure is lower than the fifth preset pressure value; when the third air pressure is higher than the sixth preset pressure value, control the cold and dry gas providing device 3 to turn off; wherein the fifth preset pressure value is less than the sixth preset pressure value, and the sixth preset pressure value is less than the first preset pressure value.

[0115] It should be clear that the above pressure control system can be applied in many fields, such as:

[0116] In the field of precision instruments, some precision instruments and components need to be tested and stored under strictly controlled environmental conditions. This pressure control system can provide the required low-temperature dry environment.

[0117] In the medical field, medical facilities such as operating rooms, laboratories and pharmacies often need to maintain a constant low temperature and dry environment to prevent infection or drug failure. This pressure control system can ensure that the air in the storage room or equipment is always kept at a low temperature and dry.

[0118] In the field of food and beverage processing, it is essential to keep the production environment cool and dry during food and beverage production to ensure product quality and safety. The system can be used in storage rooms, production lines or packaging processes to ensure that products are not affected by high temperature and humidity during processing and storage.

[0119] In the field of cultural relics protection, precious cultural relics and artworks need to be kept in a constant low temperature and dry environment to prevent decay, mildew or damage. This pressure control system can be used in the storage rooms of museums, libraries and archives.

[0120] In the field of research experiments, scientific laboratories often need to precisely control environmental conditions to conduct various experiments and research. This pressure control system can provide a stable low-temperature dry environment for the laboratory to ensure the accuracy of the experimental results.

[0121] In the following multiple embodiments, application of the pressure control system to a biological sample storage system is taken as an example for detailed description.

[0122] Please refer to Figure 5 , Figure 5A schematic diagram of the structure of a biological sample storage system provided in the fifth embodiment of the present application, the biological sample storage system includes a heat-insulating door 81 and a shell, the heat-insulating door 81 is openably arranged on the shell, the shell includes a storage chamber for placing biological samples, and in this embodiment, the heat-insulating door 81 and the shell are connected by a hinge structure 6; the biological sample storage system also includes a control system 2, a sensing module 1 and a cold and dry gas providing device 3; the sensing module 1 is used to monitor the trigger signal when the user opens the door or intends to open the door, and send a first signal to the control system 2; wherein the first signal is used to indicate to turn on the cold and dry gas providing device 3; the control system 2 is used to receive the first signal, and control the cold and dry gas providing device 3 to turn on according to the first signal; when the cold and dry gas providing device 3 is turned on, cold and dry gas is filled into the storage chamber.

[0123] In the embodiment of the present application, considering that the user needs to open the thermal insulation door 81 before sampling, the present embodiment monitors the opening state of the thermal insulation door 81 through the sensing module 1, and immediately sends a first signal to the control system 2 when it senses that the thermal insulation door 81 is opened or predicts that the trigger signal to be opened is detected. The control system 2 then starts the cold dry gas providing device 3, so as to ensure that when the thermal insulation door 81 is opened, the air pressure in the storage chamber is not lower than the air pressure of the external air, so that the interior of the storage chamber reaches a slightly positive pressure state, and the external air with higher humidity and temperature is prevented from entering the storage chamber, thereby ensuring a stable environment in the storage chamber during the sampling process, which is conducive to the preservation of biological samples.

[0124] In some optional embodiments, the biological sample storage system also includes an electric door driver, which realizes the automatic opening and closing of the door by driving the movement of the door body by a motor. Specifically, the electric door driver is usually composed of multiple components such as a motor, a reducer, and a transmission device. When the user presses the door opening button or the sensor senses a human body signal, the control system 2 will receive the command signal and control the motor to start running. After the motor is decelerated by the reducer, it drives the transmission device to make the door body move according to a predetermined trajectory, thereby realizing the automatic opening of the door. When the door body moves to a predetermined position, the control system 2 will stop the operation of the motor and stop the door body from moving. Similarly, when the user presses the door closing button or the sensor senses that the door body should be closed, the control system 2 will control the motor to run in reverse to close the door body automatically.

[0125] Please refer to Figure 6 , Figure 6 This is a functional module diagram of a biological sample storage system provided in the sixth embodiment of the present application. The sensing module 1 of this embodiment is a door opening detection device 11, which is used to detect a first trigger signal when the thermal insulation door 81 is opened, and send a first signal to the control system 2. The door opening detection device can be a travel switch or a sensor for detecting position changes, including but not limited to an angle sensor, a displacement sensor, etc.

[0126] In the embodiment of the present application, the door opening detection device 11 can be a simple mechanical switch. When the thermal insulation door 81 is opened, the mechanical switch is triggered, thereby sending a first signal to the control system 2. Alternatively, it can also be a more advanced electronic sensor, such as an infrared sensor or a magnetic sensor, which can more accurately monitor the opening state of the thermal insulation door 81. The door opening detection device 11 can accurately monitor the opening state of the thermal insulation door 81, avoiding system maloperation caused by misjudgment or missed judgment. Once the thermal insulation door 81 is opened, the door opening detection device 11 can immediately send a signal to the control system 2, and the control system 2 immediately responds to start the cold dry gas supply device 3. This immediate response ensures that the samples in the storage chamber reach a slightly positive pressure state before being exposed to the external environment.

[0127] Specifically, the door opening detection device 11 can be a travel switch; the travel switch is arranged at the edge of the insulation door 81 or the edge of the door frame, such as Figure 5 In the biological sample storage system shown, the travel switch can be arranged at the right edge of the heat preservation door 81 .

[0128] In the embodiment of the present application, the door opening detection device 11 uses a travel switch, which is a mechanical switch that triggers its open and closed state by the movement of the thermal insulation door 81. Specifically, the travel switch can be set at the edge of the thermal insulation door 81 or the edge of the door frame. When the thermal insulation door 81 is opened or closed, it will come into contact or lose contact with the travel switch, thereby changing its electrical signal state. The use of a travel switch in this embodiment can bring the following advantages: the travel switch has a simple structure and does not require complex circuits or sensors, so it has high reliability and stability, and because the manufacturing and maintenance costs of the travel switch are relatively low, the use of such a switch can reduce the cost of the entire biological sample storage system.

[0129] In some optional embodiments, the door opening detection device 11 includes a magnetic sensor; the magnetic sensor is disposed at the edge of the thermal insulation door 81 or the edge of the door frame, and a magnet is disposed at a position opposite to the magnetic sensor. Figure 5 In the biological sample storage system shown, the magnetic sensor can be disposed on the right edge of the heat preservation door 81 .

[0130] In the embodiment of the present application, the door opening detection device 11 adopts a magnetic sensor, which is a device that can sense changes in the magnetic field and has high precision and high reliability. In this embodiment, the magnetic sensor is set at the edge of the thermal insulation door 81 or the edge of the door frame, and at the same time, a magnet is set at the relative position of the magnetic sensor, for example, the magnetic sensor is set on the thermal insulation door 81, and the magnet is set at the position corresponding to the magnetic sensor on the door frame, or the magnet is set on the thermal insulation door 81, and the magnetic sensor is set at the position corresponding to the magnet on the door frame. When the thermal insulation door 81 is closed, the magnetic field of the magnet will trigger the magnetic sensor, so that it can sense the change of the magnetic field. Once this change is sensed, the magnetic sensor will immediately send a first signal to the control system 2. This signal transmission method is fast and accurate, ensuring that the control system 2 can receive information about the door opening state in time. The magnetic sensor includes a Hall effect sensor, a magnetoresistive sensor, a permanent magnetic sensor, etc. The use of the magnetic sensor in this embodiment can bring the following advantages: the magnetic sensor can accurately sense the change of the magnetic field, so it has a high sensitivity. This means that even if the thermal insulation door 81 is only slightly opened, the magnetic sensor can accurately detect it. Moreover, since the magnetic sensor and the magnet interact through the magnetic field, there is no actual physical contact between them, which avoids wear and failure caused by long-term friction, greatly prolongs the service life and reduces the frequency of maintenance and replacement.

[0131] In some optional embodiments, the door opening detection device 11 includes a pressure sensor, which is disposed at the edge of the thermal insulation door 81 or the edge of the door frame, and at the position where the thermal insulation door 81 and the door frame are in contact. Figure 5 In the biological sample storage system shown, the pressure sensor can be arranged at the position where the right edge heat preservation door 81 contacts the door frame.

[0132] In the embodiment of the present application, the door opening detection device 11 uses a pressure sensor. A pressure sensor is a device that can sense pressure changes. When subjected to external force, its resistance value or output voltage will change. The use of a pressure sensor in this embodiment can bring the following advantages: the pressure sensor directly senses the contact pressure between the thermal insulation door 81 and the door frame, so the detection result is intuitive and accurate.

[0133] Specifically, pressure sensors include piezoresistive, capacitive, inductive and piezoelectric. Among them, piezoresistive pressure sensors are made using the piezoresistive effect of single crystal silicon materials and integrated circuit technology. They have the advantages of high sensitivity, high precision and wide measurement range, but are easily affected by temperature and need to take temperature compensation measures. Capacitive pressure sensors convert pressure into capacitance and measure pressure by measuring changes in capacitance. They have the advantages of high resolution, good stability and long life, but are easily affected by temperature and humidity, and need to take corresponding compensation measures. Inductive pressure sensors use the principle of electromagnetic induction to convert pressure into inductance. They have the advantages of wide measurement range, strong anti-interference ability and high stability, but are large in size and are not suitable for miniaturized applications. Piezoelectric pressure sensors use the principle of piezoelectric effect to convert pressure into electrical energy. They have the advantages of high sensitivity, fast response speed and small size, but the output signal is small and amplification measures need to be taken.

[0134] Please refer to Figure 7 , Figure 7 This is a functional module diagram of the biological sample storage system provided in the seventh embodiment of the present application. The sensing module 1 of this embodiment adopts a human detection device 12. The human detection device 12 is used to detect the second trigger signal when there is a person or object in front of the thermal insulation door 81, and send a first signal to the control system 2. Figure 5 In the biological sample storage system shown, the human body detection device 12 can be set on the top 91 of the shell panel or the bottom 92 of the shell panel. It should be clear that the detection area of ​​the human body detection device 12 does not interfere with the activity range of the thermal insulation door 81.

[0135] In the embodiment of the present application, considering that it takes a certain response time for the cold dry gas providing device 3 to be turned on to form a micro-positive pressure environment in the storage room, the sensing module 1 of this embodiment uses the human body detection device 12 to detect whether there is a person before the thermal insulation door 81 is actually opened. If the presence of a person is detected, it is predicted that a sampling operation may be performed later, and the cold dry gas providing device 3 is turned on in advance, so that a micro-positive pressure environment has been formed in the storage room when sampling. Specifically, the human body detection device 12 usually includes an infrared sensor or a radar sensor, which can transmit and receive signals, and judge whether there is a person in front of the thermal insulation door 81 by analyzing the change of the signal. When a human body is detected, the sensor will immediately send a first signal to the control system 2.

[0136] In some optional embodiments, the human detection device 12 uses an infrared sensor, which is used to emit infrared rays, monitor the second trigger signal when the infrared rays are blocked or reflected, and send the first signal to the control system 2.

[0137] In the embodiment of the present application, the infrared sensor will actively send infrared rays. When the infrared rays encounter an object (such as a human body), they will be reflected or blocked. The infrared sensor determines whether there is a human body in front of the thermal insulation door 81 by detecting these reflected or blocked infrared rays. When it is detected that the infrared rays are blocked or reflected, the infrared sensor will immediately send a first signal to the control system 2. The use of infrared sensors in this embodiment can bring the following advantages: the infrared sensor can quickly detect the presence of a human body and send a signal to the control system 2 in a short time to ensure a timely response of the system. The infrared sensor has a certain anti-interference ability to changes in light and other interference factors, and can work stably in complex environments. By setting the angle at which the infrared sensor emits infrared rays, it is possible to detect whether there is a person in a specific area, so as to more accurately predict the sampling action.

[0138] In some optional embodiments, the human detection device 12 uses a microwave radar sensor, which is used to emit multiple signal waves outward using microwaves, monitor the second trigger signal when the signal wave is about to be bounced back, and send the first signal to the control system 2.

[0139] In an embodiment of the present application, the microwave signal wave emitted by the microwave radar sensor will be reflected back when it encounters an object (such as a human body). By receiving and analyzing these reflected signal waves, the sensor can accurately determine whether there is a human body in front of the thermal insulation door 81. When it is detected that the signal wave is bounced back, the microwave radar sensor will immediately send a first signal to the control system 2. The use of microwave radar sensors in this embodiment can bring the following advantages: the microwave radar sensor can penetrate some non-metallic materials (such as clothing, glass, etc.), making the detection more accurate and reliable. The microwave radar sensor has strong adaptability to light changes and environmental interference, and can work stably in different scenarios. The microwave radar sensor has a longer detection distance and a wider detection range, and can cover a larger area in front of the thermal insulation door 81.

[0140] Please refer to Figure 8 , Figure 8 This is a functional module diagram of a biological sample storage system provided in the eighth embodiment of the present application. The sensing module 1 of this embodiment adopts a pre-door opening detection module 13, which is arranged at the door opening position 7 of the thermal insulation door 81. The pre-door opening detection module 13 is used to detect the third trigger signal when the door opening position 7 is touched, and send a first signal to the control system 2. The door opening position 7 can be a door handle arranged on the right side of the thermal insulation door, a groove arranged on the right side of the thermal insulation door, or a position on the right edge of the thermal insulation door that is convenient for grasping.

[0141] In the embodiment of the present application, the sensing module 1 includes a pre-door opening detection module 13, which is installed on the door opening position 7 of the thermal insulation door 81 and can accurately detect whether the door opening position 7 is touched. The pre-door opening detection module 13 can be implemented using a variety of technologies, such as a pressure sensor, a capacitive sensor, or an infrared sensor. When someone holds the door opening position 7, these sensors can detect corresponding changes (such as physical buttons, pressure changes, capacitance changes, or infrared blocking), thereby determining that the door opening position 7 is touched. Once it is detected that the door opening position 7 is touched, the pre-door opening detection module 13 will immediately send a first signal to the control system 2.

[0142] In some optional embodiments, the pre-door opening detection module 13 uses a key switch, and the key switch is used to monitor the third trigger signal when the button is pressed and send the first signal to the control system 2.

[0143] Optionally, the door opening position 7 is a door handle, and a push switch is set at the door opening position 7 of the thermal insulation door 81. When the user holds the door opening position 7, he also presses the button of the push switch on the door opening position 7 to close the switch, forming an electrical signal, which is then sent to the control system 2.

[0144] More preferably, the key switch can be a switch with a mechanical locking function. When the button is pressed for the first time, the switch is turned on and remains in a self-locking state. Even if the button is released, the switch remains in a closed state. When the button is pressed again, the switch is disconnected and the button pops out. In this embodiment, when the user opens the thermal insulation door 81 when holding the door opening position 7 for the first time, the key switch is turned on and remains in a self-locking state. During the sampling process after the user opens the thermal insulation door 81, the control system 2 continues to receive the first signal, and the cold dry gas providing device continues to be turned on. After the user completes the sampling, when the user holds the door opening position 7 for the second time to close the thermal insulation door 81, the key switch is disconnected, the button automatically pops out, and the cold dry gas providing device is turned off. If the user does not touch the key switch when closing the thermal insulation door 81, and the cold dry gas providing device is not turned off, the user can press the key switch again to turn off the cold dry gas providing device.

[0145] The key switch may also be a switch without a mechanical locking function. When the button is pressed, the control system 2 receives the first signal sent by the key switch. When the button is released, the control system 2 does not receive the first signal. If the control system 2 does not receive the first signal within a certain period of time, the cold dry gas providing device 3 is controlled to be closed. When the user is taking samples, the user holds the door opening position 7 to open the heat preservation door 81 and presses the button. The control system 2 receives the first signal sent by the key switch. The control system 2 controls the cold dry gas providing device 3 to be turned on according to the first signal. After the heat preservation door 81 is opened, the button is released, the key switch no longer sends the first signal. At the same time, the heat preservation door 81 is detected to be opened by the door opening detection device 11. The door opening detection device 11 sends the first signal to the control system 2, and the control system 2 still controls the cold dry gas providing device 3 to be turned on. If the heat preservation door 81 is not opened, the button is released, and the control system 2 does not receive the first signal within a certain period of time, the cold dry gas providing device 3 is controlled to be turned off.

[0146] In some optional embodiments, the pre-door opening detection module 13 uses a touch sensing sensor, which is used to detect a third trigger signal when a touch area is touched, and send a first signal to the control system 2.

[0147] In the embodiment of the present application, when sampling, the user needs to first hold the door opening position 7 to open the thermal insulation door 81, and set a touch sensing sensor in the touch area where the hand contacts the door opening position 7. Touch sensing sensors usually work based on the principle of capacitance or resistance. When the user's finger or other object touches the touch area of ​​the sensor, the capacitance or resistance value of the sensor will change, thereby generating a first signal, and the first signal will be sent to the control system 2. The control system 2 controls the cold dry gas providing device 3 to turn on according to the first signal. The use of a touch sensing sensor in this embodiment can bring the following advantages: the touch sensing sensor has high sensitivity and can accurately detect slight touch actions. In addition, the touch sensing sensor can be designed to be coordinated with the appearance of the door opening position 7, without the need to set a raised button, thereby improving the user experience.

[0148] When the user is taking samples, while holding the door opening position 7 to open the heat preservation door 81, the touch sensing sensor detects the third trigger signal and sends the first signal to the control system 2. The control system 2 receives the first signal sent by the touch sensing sensor, and the control system 2 controls the cold dry gas providing device 3 to open according to the first signal. After the heat preservation door 81 is opened, the user's hand leaves the door opening position 7, and the touch sensing sensor no longer sends the first signal to the control system 2. At the same time, the heat preservation door 81 is detected to be opened by the door opening detection device 11. The door opening detection device 11 sends the first signal to the control system 2, and the control system 2 still controls the cold dry gas providing device 3 to open. If the heat preservation door 81 is not opened, the touch sensing sensor cannot detect the third trigger signal, and the control system 2 cannot receive the first signal within a certain period of time, then the cold dry gas providing device 3 is controlled to be closed.

[0149] In some optional embodiments, the touch sensing sensor may be a capacitive tactile sensor, a piezoresistive tactile sensor, or an optical tactile sensor.

[0150] Among them, the capacitive touch sensor is a sensor that can sense changes in external pressure or contact state. Its working principle is to sense changes in external pressure or contact state by measuring changes in capacitance between capacitor plates. Capacitive touch sensors usually consist of two electrodes, one of which is fixed and the other is movable. When external pressure acts on the movable electrode, the distance between the two electrodes changes, resulting in changes in capacitance. Capacitive touch sensors have the advantages of simple structure, high sensitivity, fast response speed, and wide dynamic range.

[0151] Piezoresistive tactile sensors are sensors based on the piezoresistive effect. Their working principle is to sense changes in external pressure or deformation by measuring changes in the resistance value of the material. Piezoresistive tactile sensors are usually made of materials with piezoresistive effect, such as semiconductor materials such as silicon and germanium. When external pressure acts on the sensor, the resistance value of the material will change. By measuring the change in resistance value, the magnitude of external pressure or deformation can be sensed. Piezoresistive tactile sensors have the advantages of high sensitivity, fast response speed, wide measurement range, and good stability.

[0152] An optical tactile sensor is a tactile sensor based on optical principles. Its working principle is usually to sense the shape, size, position and other information of external objects by measuring the reflection or scattering of light on the surface of the object. An optical tactile sensor usually includes a light source, an optical system, a photoelectric conversion device and other parts. When an external object contacts the sensor surface, it will cause reflection or scattering of light. By measuring the changes in the reflected or scattered light, the information of the external object can be sensed. Optical tactile sensors have the advantages of non-contact measurement, high resolution, and high sensitivity.

[0153] It should be clear that the sensing module 1 may include any two of the door opening detection device 11, the human body detection device 12 and the pre-door opening detection module 13, or all three. The control flow of each situation is described below:

[0154] Please refer to Fig. 9 , Fig. 9 This is a functional module diagram of a biological sample storage system provided for the ninth embodiment of the present application. The sensing module 1 of this embodiment integrates a door opening detection device 11 and a human body detection device 12. First, when a person or an object approaches the detection area of ​​the human body detection device 12, the human body detection device 12 detects a second trigger signal and predicts that a subsequent sampling operation will be performed. The control system 2 controls the cold dry gas supply device 3 to provide cold dry gas, so that the storage chamber reaches a slightly positive pressure state. Afterwards, if the door opening detection device 11 does not detect the first trigger signal within a certain time range, the control system 2 controls the cold dry gas supply device 3 to be closed; if the door opening detection device 11 detects the first trigger signal within a certain time range, the control system 2 controls the cold dry gas supply device 3 to be opened, until the door opening detection device 11 does not detect the first trigger signal, that is, the insulation door 81 is closed, and the control system 2 controls the cold dry gas supply device 3 to be closed.

[0155] Please refer to Fig.10 , Fig.10 This is a functional module diagram of a biological sample storage system provided in the tenth embodiment of the present application; the sensing module 1 of this embodiment integrates a pre-door opening detection module 13 and a human body detection device 12. The detection results of the pre-door opening detection module 13 and the human body detection device 12 are combined to determine whether there is an intention to open the door for sampling, specifically: when the pre-door opening detection module 13 detects the third trigger signal, and the human body detection device 12 detects the second trigger signal, the control system 2 controls the cold and dry gas providing device 3 to open. In the case where the pre-door opening detection module 13 does not detect the third trigger signal, or the human body detection device 12 does not detect the second trigger signal, it is deemed that there is no intention to open the door for sampling, and the cold and dry gas providing device 3 is not turned on.

[0156] Please refer to Fig.11 , Fig.11This is a functional module diagram of the biological sample storage system provided in the eleventh embodiment of the present application; the sensing module 1 of this embodiment integrates a door opening detection device 11 and a pre-door opening detection module 13. First, when a person holds the door opening position 7, the pre-door opening detection module 13 detects the third trigger signal and predicts that a subsequent sampling operation will be performed. The control system 2 controls the cold dry gas supply device 3 to provide cold dry gas, so that the storage chamber reaches a slightly positive pressure state. Afterwards, if the door opening detection device 11 does not detect the first trigger signal within a certain time range, the control system 2 controls the cold dry gas supply device 3 to be closed; if the door opening detection device 11 detects the first trigger signal within a certain time range, the control system 2 controls the cold dry gas supply device 3 to be opened, until the door opening detection device 11 does not detect the first trigger signal, that is, the insulation door 81 is closed, and the control system 2 controls the cold dry gas supply device 3 to be closed.

[0157] Please refer to Fig.12 , Fig.12 This is a functional module diagram of a biological sample storage system provided in the twelfth embodiment of the present application; the sensing module 1 of this embodiment integrates a door opening detection device 11, a human body detection device 12 and a pre-door opening detection module 13. First, the detection results of the pre-door opening detection module 13 and the human body detection device 12 are combined to determine whether there is an intention to open the door for sampling. If there is an intention to open the door for sampling, the control system 2 controls the cold dry gas supply device 3 to open, so that the storage chamber reaches a slightly positive pressure state. Afterwards, if the door opening detection device 11 does not detect the first trigger signal within a certain period of time, the control system 2 controls the cold dry gas supply device 3 to close; if the door opening detection device 11 detects the first trigger signal within a certain period of time, the control system 2 controls the cold dry gas supply device 3 to open, until the door opening detection device 11 does not detect the first trigger signal, that is, the insulation door 81 is closed, and the control system 2 controls the cold dry gas supply device 3 to close.

[0158] In some optional embodiments, the biological sample storage system also includes a first gas pressure sensor 4, which is arranged in the storage chamber; the first gas pressure sensor 4 is connected to the control system 2, and the first gas pressure sensor 4 is used to monitor the first air pressure in the storage chamber and send the first air pressure to the control system 2; the control system 2 is used to control the cold and dry gas providing device 3 to turn on when the first air pressure is lower than a first preset pressure value; when the first air pressure is higher than a second preset pressure value, control the cold and dry gas providing device 3 to turn off; wherein the first preset pressure value is less than the second preset pressure value.

[0159] In the embodiment of the present application, in order to maintain the stability of the ambient gas pressure in the storage room, a first gas pressure sensor 4 is provided in the storage room. The first gas pressure sensor 4 monitors the first gas pressure in the storage room based on the principle of piezoresistive effect or piezoelectric effect, and the control system 2 controls the opening and closing of the cold and dry gas providing device 3 according to the first gas pressure. In a specific embodiment, the opening and closing of the cold and dry gas providing device 3 is controlled according to the first gas pressure. This control logic has a higher priority. For example, when the sensing module 1 detects the trigger signal and sends the first signal to the control, the control system 2 receives the first signal. If the control system 2 simultaneously detects that the first gas pressure is higher than the second preset pressure value, the control system 2 controls the cold and dry gas providing device 3 to be closed according to the first gas pressure being higher than the second preset pressure value. For another example, if the control system 2 does not receive the first signal sent by the sensing module 1, and at the same time, the control system 2 detects that the first gas pressure is lower than the first preset pressure value, the control system 2 controls the cold and dry gas providing device 3 to be opened.

[0160] In some optional embodiments, the cold and dry gas providing device 3 includes a cold dryer 32 and a gas storage tank; the cold dryer 32 is used to prepare cold and dry gas, and transport the prepared cold and dry gas to the gas storage tank through the air inlet channel of the gas storage tank for storage; the air outlet channel of the gas storage tank is connected to the storage chamber, and a solenoid valve 31 is provided on the air outlet channel; the solenoid valve 31 is connected to the control system 2, and when the solenoid valve 31 is opened, the cold and dry gas in the gas storage tank is transported to the storage chamber through the air outlet channel.

[0161] In the embodiment of the present application, cold dry gas is prepared by a cold dryer 32, and the prepared cold dry gas is transported to a gas tank for storage. The cold dry gas pressure in the gas tank is relatively high. When it is necessary to fill the storage chamber with cold dry gas, it is only necessary to open the solenoid valve 31 of the gas tank outlet channel to send the pre-prepared cold dry gas into the storage chamber, thereby improving the response speed of the system.

[0162] In some optional embodiments, a second gas pressure sensor 5 is provided in the gas tank; the second gas pressure sensor 5 is connected to the control module 321 of the cold dryer 32, and the second gas pressure sensor 5 is used to monitor the second air pressure in the gas tank and send the second air pressure to the control system 2; the control system 2 is used to control the cold dryer 32 to turn on when the second air pressure is lower than a third preset pressure value; and control the cold dryer 32 to turn off when the second air pressure is higher than a fourth preset pressure value; wherein the third preset pressure value is greater than the second preset pressure value, and the fourth preset pressure value is greater than the third preset pressure value.

[0163] In the embodiment of the present application, a second gas pressure sensor 5 is added inside the gas tank. The second gas pressure sensor 5 monitors the gas pressure in the gas tank, i.e., the second air pressure, based on the principle of piezoresistive effect or piezoelectric effect, and sends this data to the control module 321 of the cold dryer 32 in real time. The control module 321 of the cold dryer 32 accurately controls the operation of the cold dryer 32 according to the second air pressure to ensure that the air pressure in the gas tank is always maintained within a suitable range. Specifically, when the second air pressure in the gas tank is lower than the third preset pressure value, the control module 321 will immediately start the cold dryer 32, start preparing cold dry gas and inject it into the gas tank to restore the air pressure to a suitable range. When the second air pressure is higher than the fourth preset pressure value, the control module 321 will control the cold dryer 32 to shut down to avoid excessive air pressure in the gas tank.

[0164] It should be noted here that the air pressure in the gas tank should always be greater than the air pressure in the storage room to ensure that when the gas tank delivers cold and dry gas to the storage room, the air pressure in the gas tank can still meet the demand.

[0165] In some optional embodiments, the biological sample storage system further includes a mechanical arm 831; the mechanical arm 831 is used to take out the sample when the thermal insulation door is opened. In the embodiment of the present application, the mechanical arm 831 can be arranged in the storage chamber 84, and after the thermal insulation door is opened, the mechanical arm 831 takes out the sample in the storage chamber 84. The mechanical arm 831 can also be arranged outside the storage chamber 84, and after the thermal insulation door is opened, the mechanical arm 831 extends into the storage chamber 84 to perform a sampling operation.

[0166] Please refer to Fig.13 , Fig.13 The schematic diagram of the structure of the biological sample storage system provided for the thirteenth embodiment of the present application, the biological sample storage system also includes a mechanical arm working cabin 83; the mechanical arm working cabin 83 is used to accommodate a mechanical arm 831, and the mechanical arm working cabin 83 is separated from the storage chamber 84 by a heat preservation door. In the embodiment of the present application, the mechanical arm 831 is arranged in the mechanical arm working cabin 83 outside the storage chamber 84, and when the heat preservation door is closed, the mechanical arm working cabin 83 and the storage chamber 84 are not connected; when the heat preservation door is opened, the mechanical arm working cabin 83 and the storage chamber 84 are connected, and the mechanical arm 831 can extend into the storage chamber 84 to perform sampling operations.

[0167] In some optional embodiments, a third gas pressure sensor is provided in the robot arm working cabin 83; the third gas pressure sensor is connected to the control system, and the third gas pressure sensor is used to monitor the third air pressure in the robot arm working cabin 83 and send the third air pressure to the control system; the control system is used to control the cold and dry gas providing device to turn on when the third air pressure is lower than the fifth preset pressure value; when the third air pressure is higher than the sixth preset pressure value, the cold and dry gas providing device is controlled to turn off; wherein the fifth preset pressure value is less than the sixth preset pressure value, and the sixth preset pressure value is less than the first preset pressure value.

[0168] In the embodiment of the present application, the third air pressure in the manipulator working cabin 83 is monitored by the third air pressure sensor, and the control system controls the air pressure in the manipulator working cabin 83 within a suitable range according to the third air pressure, that is, the third air pressure in the manipulator working cabin 83 should be less than the first air pressure in the storage chamber 84, so as to prevent the air in the manipulator working cabin 83 from being poured into the storage chamber 84 when the insulation door is opened. In addition, the third air pressure in the manipulator working cabin 83 should be greater than the external atmospheric pressure, so as to prevent the external air from being poured into the manipulator working cabin 83 when the door of the manipulator working cabin 83 is opened.

[0169] Please refer to Fig.14 , Fig.14 This is a schematic diagram of the structure of the biological sample storage system provided in the fourteenth embodiment of the present application. The biological sample storage system also includes a sampling door plate 82. The sampling door plate 82 and the shell form a storage chamber for placing biological samples. The thermal insulation door 81 is closed to cover the sampling door plate 82. In the embodiment of the present application, when the thermal insulation door 81 is opened, the sampling door plate 82 is still provided to separate the internal space of the storage chamber from the external space, thereby reducing the air exchange between the internal and external spaces of the storage chamber during the sampling process.

[0170] In some optional embodiments, the sampling door plate 82 includes a plate body and a transfer device 821 disposed on the plate body, and the transfer device 821 has an open state and a closed state; the transfer device 821 connects the sampling channels on one side of the plate body with the sampling channels on the other side of the plate body in the open state; when the transfer device 821 is in the closed state, the space on both sides of the plate body is completely separated by the sampling door plate 82. In the embodiment of the present application, sampling is performed by the transfer device 821 disposed on the sampling door plate 82. When the transfer device 821 is closed, there is no connecting channel between the storage chamber and the atmospheric environment. Only when the transfer device 821 is opened, there is a connecting channel between the storage chamber and the atmospheric environment, and the connecting channel is small, which can effectively reduce the air exchange between the inside and outside of the storage chamber during the sampling process, ensure a stable environment in the storage chamber during the sampling process, and is conducive to the preservation of biological samples.

[0171] In some optional embodiments, the transfer device 821 includes at least one layer of elastic diaphragm, and each layer of the diaphragm includes a plurality of elastic parts arranged along the circumferential direction. When the elastic part is supported by the sampling device, the elastic part is deformed to put the transfer device 821 in an open state; when the elastic part is reset, the transfer device 821 is in a closed state.

[0172] Optionally, the elastic portion 8211 is fan-shaped, that is, the elastic portion 8211 is an arc-shaped piece. It is not difficult to understand that the elastic portion 8211 is also elastic and can undergo elastic deformation. The elastic portions 8211 of the same layer can be assembled into a circle along the circumference. There are seams between the elastic portions 8211. When the elastic portions 8211 are not subjected to external forces, the edges of the two adjacent elastic portions 8211 contact each other, and the size of the seams between the elastic portions 8211 is almost zero, so that the space on both sides of the diaphragm is not connected to the diaphragm. At this time, the transfer device 821 is in a closed state, and the space on both sides of the plate is separated at the position of the transfer device 821. In other embodiments, the diaphragm may also be a rectangle or other polygon, and the elastic portion 8211 may also be a triangle, rectangle, or the like; in the embodiment in which the diaphragm is other polygons, the diaphragm is preferably a regular polygon with 5 to 10 sides.

[0173] When the elastic part 8211 is held by the sampling device, the elastic part 8211 will be deformed, and the edges of the two adjacent elastic parts 8211 will separate from each other, so that the transfer device 821 is in an open state. After the sampling device completes sampling, the force applied by the sampling device to the elastic part 8211 disappears, the elastic part 8211 in the diaphragm is reset under the action of its own elasticity, and the transfer device 821 automatically changes to a closed state. In some embodiments, the elastic part 8211 can be a silicone material structure, a silicone rubber material structure, and a rubber material structure, such as natural rubber, butadiene rubber, styrene-butadiene rubber, propylene rubber, etc., and technicians in this field can select according to the actual application scenario.

[0174] Of course, in other embodiments, the transfer device 821 may also include two or more layers of membranes, on which basis, the seams between the elastic parts 8211 in two adjacent layers of membranes are staggered to further reduce the amount of external gas entering the storage chamber during the sampling process. In other embodiments, the seams between the elastic parts 8211 in two adjacent layers of membranes may not be staggered.

[0175] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0176] It should be noted that one or more embodiments of the present application include hardware improvements, and also involve computer programs corresponding to the improved hardware. The computer programs involved in this solution mainly include "determining the corresponding control instructions based on the received input signal, and outputting the corresponding control instructions to the corresponding controlled module", "performing threshold judgment based on the air pressure value to output different control signals to the corresponding controlled module", etc. These computer programs are known computer programs and are the objects of protection of utility model patents.

[0177] In addition, the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0178] Furthermore, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0179] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0180] In the description of the present application, it should be noted that the terms "center", "up", "down", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the application are usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0181] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0182] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A biological sample storage system, characterized in that: It comprises a heat preservation door and a shell, wherein the heat preservation door is openably arranged on the shell, and the shell comprises a storage chamber for placing biological samples; The system also includes a control system, a sensing module and a cold and dry gas supply device; The sensing module is used to detect a trigger signal when the user opens the door or intends to open the door, and send a first signal to the control system; wherein the first signal is used to indicate to turn on the cold and dry gas supply device; The control system is used to receive a first signal and control the cold and dry gas providing device to start according to the first signal; The cold and dry gas supply device fills the storage chamber with cold and dry gas when it is turned on.

2. The biological sample storage system according to claim 1, characterized in that: The sensing module includes a door opening detection device, which is used to monitor a first trigger signal when the thermal insulation door is opened and send a first signal to the control system.

3. The biological sample storage system according to claim 2, characterized in that: The door opening detection device comprises a travel switch; the travel switch is arranged at the edge of the thermal insulation door or the edge of the door frame.

4. The biological sample storage system according to claim 2, characterized in that: The door opening detection device comprises a magnetic sensor; the magnetic sensor is arranged on the edge of the thermal insulation door or the edge of the door frame, and a magnet is arranged at a relative position of the magnetic sensor.

5. The biological sample storage system according to claim 2, characterized in that: The door opening detection device comprises a pressure sensor, and the pressure sensor is arranged at the edge of the thermal insulation door or the edge of the door frame, and at the position where the thermal insulation door and the door frame are in contact.

6. The biological sample storage system according to claim 1, characterized in that: The sensing module includes a human body detection device, which is used to monitor the second trigger signal when there is a person or an object in front of the thermal insulation door, and send a first signal to the control system.

7. The biological sample storage system according to claim 6, characterized in that: The human body detection device comprises an infrared sensor, which is used to emit infrared rays, detect a second trigger signal when the infrared rays are blocked or reflected, and send a first signal to the control system.

8. The biological sample storage system according to claim 6, characterized in that: The human body detection device includes a microwave radar sensor, which is used to emit multiple signal waves outward using microwaves, monitor the second trigger signal when the signal wave is about to be bounced back, and send the first signal to the control system.

9. The biological sample storage system according to claim 1, characterized in that: The sensing module includes a pre-door opening detection module, which is arranged at the door opening position of the thermal insulation door. The pre-door opening detection module is used to monitor a third trigger signal when the door opening position is touched, and send a first signal to the control system.

10. The biological sample storage system according to claim 9, characterized in that: The pre-door opening detection module includes a key switch, and the key switch is used to monitor a third trigger signal when a button is pressed and send a first signal to the control system.

11. The biological sample storage system according to claim 9, characterized in that: The pre-door opening detection module includes a touch sensing sensor, which is used to detect a third trigger signal when a touch area is touched, and send a first signal to the control system.

12. The biological sample storage system according to claim 11, characterized in that: The touch sensing sensor includes a capacitive touch sensor, a piezoresistive touch sensor or an optical touch sensor.

13. The biological sample storage system according to claim 1, characterized in that: Also included is a first gas pressure sensor, the first gas pressure sensor being disposed in the storage chamber; The first gas pressure sensor is connected to the control system, and the first gas pressure sensor is used to monitor the first gas pressure in the storage chamber and send the first gas pressure to the control system; The control system is used to control the cold and dry gas providing device to start when the first gas pressure is lower than a first preset pressure value; When the first gas pressure is higher than a second preset pressure value, the cold and dry gas providing device is controlled to be closed; wherein the first preset pressure value is less than the second preset pressure value.

14. The biological sample storage system according to claim 13, characterized in that: The cold and dry gas providing device comprises a cold dryer and a gas storage tank; The cold dryer is used to prepare cold dry gas, and transport the prepared cold dry gas to the gas storage tank through the air inlet channel of the gas storage tank for storage; The air outlet channel of the gas storage tank is connected to the storage chamber, and a solenoid valve is provided on the air outlet channel; the solenoid valve is connected to the control system, and when the solenoid valve is opened, the cold and dry gas in the gas storage tank is transported to the storage chamber through the air outlet channel.

15. The biological sample storage system according to claim 14, characterized in that: A second gas pressure sensor is provided in the gas storage tank; The second gas pressure sensor is connected to the control module of the cold dryer, and the second gas pressure sensor is used to monitor the second gas pressure in the gas storage tank and send the second gas pressure to the control system; The control system is used to control the cold dryer to start when the second air pressure is lower than a third preset pressure value; When the second air pressure is higher than a fourth preset pressure value, the cold dryer is controlled to be turned off; wherein the third preset pressure value is greater than the second preset pressure value, and the fourth preset pressure value is greater than the third preset pressure value.

16. The biological sample storage system according to claim 13, characterized in that: It also includes a robotic arm, which is used to take out samples when the thermal insulation door is opened.

17. The biological sample storage system according to claim 16, characterized in that: It also includes a robot arm working cabin; the robot arm working cabin is used to accommodate the robot arm, and the robot arm working cabin is separated from the storage room by the thermal insulation door.

18. The biological sample storage system according to claim 17, characterized in that: A third gas pressure sensor is provided in the working cabin of the mechanical arm; The third gas pressure sensor is connected to the control system, and the third gas pressure sensor is used to monitor the third gas pressure in the working cabin of the manipulator and send the third gas pressure to the control system; The control system is used to control the cold and dry gas providing device to start when the third gas pressure is lower than a fifth preset pressure value; When the third gas pressure is higher than the sixth preset pressure value, the cold dry gas providing device is controlled to be closed; wherein the fifth preset pressure value is smaller than the sixth preset pressure value, and the sixth preset pressure value is smaller than the first preset pressure value.

19. The biological sample storage system according to any one of claims 2 to 3, characterized in that: It also includes a sampling door plate; the sampling door plate and the shell form a storage chamber for placing biological samples, and the thermal insulation door covers the sampling door plate when it is closed.

20. The biological sample storage system according to any one of claims 1, 4 to 15, characterized in that: It also includes a sampling door plate; the sampling door plate and the shell form a storage chamber for placing biological samples, and the thermal insulation door covers the sampling door plate when it is closed.

21. The biological sample storage system according to claim 20, characterized in that: The sampling door plate includes a plate body and a transfer device arranged on the plate body, and the transfer device has an open state and a closed state; when the transfer device is in the open state, the sampling channel on one side of the plate body is connected with the sampling channel on the other side of the plate body; when the transfer device is in the closed state, the space on both sides of the plate body is separated by the sampling door plate.

22. The biological sample storage system according to claim 21, characterized in that: The transfer device includes at least one layer of elastic diaphragm, and each layer of the diaphragm includes a plurality of elastic parts arranged along the circumferential direction. When the elastic parts are resisted, the elastic parts are deformed to put the transfer device in an open state; when the elastic parts are reset, the transfer device is in a closed state.

23. A pressure control system, characterized in that: It includes a control system, a sensing module and a cold and dry gas supply device; The sensing module is used to detect a trigger signal when the user opens the door or intends to open the door, and send a first signal to the control system; wherein the first signal is used to indicate to turn on the cold and dry gas supply device; The control system is used to receive a first signal and control the cold and dry gas providing device to start according to the first signal; The cold and dry gas supply device fills the storage chamber with cold and dry gas when it is turned on.

24. The pressure control system according to claim 23, characterized in that: Also included is a first gas pressure sensor, the first gas pressure sensor being disposed in the storage chamber; The first gas pressure sensor is connected to the control system, and the first gas pressure sensor is used to monitor the first gas pressure in the storage chamber and send the first gas pressure to the control system; The control system is used to control the cold and dry gas providing device to start when the first gas pressure is lower than a first preset pressure value; When the first gas pressure is higher than a second preset pressure value, the cold and dry gas providing device is controlled to be closed; wherein the first preset pressure value is less than the second preset pressure value.

25. The pressure control system according to claim 24, characterized in that: The cold and dry gas providing device comprises a cold dryer and a gas storage tank; The cold dryer is used to prepare cold dry gas, and transport the prepared cold dry gas to the gas storage tank through the air inlet channel of the gas storage tank for storage; The air outlet channel of the gas storage tank is connected to the storage chamber, and a solenoid valve is provided on the air outlet channel; the solenoid valve is connected to the control system, and when the solenoid valve is opened, the cold and dry gas in the gas storage tank is transported to the storage chamber through the air outlet channel.

26. The pressure control system according to claim 25, characterized in that: Also included is a second gas pressure sensor, wherein the second gas pressure sensor is disposed in the gas storage tank; The second gas pressure sensor is connected to the control module of the cold dryer, and the second gas pressure sensor is used to monitor the second gas pressure in the gas storage tank and send the second gas pressure to the control system; The control system is used to control the cold dryer to start when the second air pressure is lower than a third preset pressure value; When the second air pressure is higher than a fourth preset pressure value, the cold dryer is controlled to be turned off; wherein the third preset pressure value is greater than the second preset pressure value, and the fourth preset pressure value is greater than the third preset pressure value.

27. The pressure control system according to claim 25, characterized in that: It also includes a robotic arm, which is connected to the control system; the robotic arm is used to take out the sample when the thermal insulation door is opened.

28. The pressure control system according to claim 27, characterized in that: The mechanical arm is arranged in a mechanical arm working cabin, and a third gas pressure sensor is arranged in the mechanical arm working cabin; The third gas pressure sensor is connected to the control system, and the third gas pressure sensor is used to monitor the third gas pressure in the working cabin of the manipulator and send the third gas pressure to the control system; The control system is used to control the cold and dry gas providing device to start when the third gas pressure is lower than a fifth preset pressure value; When the third gas pressure is higher than the sixth preset pressure value, the cold dry gas providing device is controlled to be closed; wherein the fifth preset pressure value is smaller than the sixth preset pressure value, and the sixth preset pressure value is smaller than the first preset pressure value.

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