Control method of biological sample storage system

Abstract

According to the control method of the biological sample storage system, in consideration of the fact that a user needs to open the heat preservation door before sampling, the sensing module monitors the opening state of the heat preservation door, senses that the heat preservation door is opened or pre-judges that the heat preservation door is to be opened, and immediately sends the first signal to the 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 control method for a biological sample storage system. Background Art

[0003] When sampling from an existing manual sampling biological sample storage system, the insulation door of the storage chamber needs to be opened. Since the temperature inside the storage chamber 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 flow into the storage chamber, causing the temperature and humidity in the storage chamber to change, destroying the stable environment in the storage chamber, and adversely affecting the preservation of biological samples. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a control method for a biological sample storage system to address the problem in existing biological sample storage systems that, during the sampling process, a pressure difference between the inside and outside of the storage chamber causes air with high humidity and temperature to flow into the storage chamber, causing changes in the temperature and humidity within the storage chamber, destroying the stable environment within the storage chamber, and adversely affecting the preservation of biological samples.

[0005] This application is implemented as follows:

[0006] The present invention provides a control method for a biological sample storage system, which includes a heat-insulating door, a housing, a cold and dry gas supply device, a sensing module, and a control system. The heat-insulating door is openably mounted on the housing, and the housing includes a storage chamber. The control system is signal-connected to the cold and dry gas supply device and the sensing module. The control method includes:

[0007] When the sensing module senses a trigger signal, it sends a first signal to the control system. The control system controls the cold and dry gas supply device to turn on according to the received first signal, and supplies gas to the storage chamber so that the air pressure inside the storage chamber is greater than the air pressure outside the storage chamber; wherein the trigger signal is a signal detected when the user opens the door or intends to open the door.

[0008] In the above implementation process, considering that the user needs to open the insulation door before sampling, this embodiment uses a sensing module to monitor the opening status of the insulation door. When the sensing module senses that the insulation door is opened or predicts a trigger signal that it will be opened, it will immediately send a first signal to the control system. The control system then starts the cold and dry gas providing device according to the received first signal, and uses the cold and dry gas providing device to fill the storage chamber with cold and dry gas. This can ensure that when the insulation door is opened, the air pressure inside the storage chamber is not lower than the air pressure outside the storage chamber, so that the inside of the storage chamber reaches a slightly positive pressure state, thereby preventing external air with higher humidity and temperature from entering the storage chamber, and can improve the environmental stability in the storage chamber during sampling, which is beneficial to the preservation of biological samples.

[0009] In an optional embodiment, the sensing module includes a door opening detection device, the housing has a door frame for contacting the thermal insulation door, the thermal insulation door has a contact position for contacting the door frame when closed, and the door opening detection device is provided at the contact position and / or the door frame; when the sensing module senses a trigger signal, it sends a first signal to the control system, including:

[0010] When the thermal insulation door is opened, the door opening detection device senses a trigger signal and sends a first signal to the control system.

[0011] In the above implementation process, since the contact situation between the contact position of the thermal insulation door and the door frame will change when the thermal insulation door is opened, a door opening detection device is set at the door frame or the contact position. When the thermal insulation door is opened and the contact situation between the contact position and the door frame changes, the door opening detection device will sense the trigger signal and send a first signal to the control system, so that the control system can start the cold and dry gas supply device according to the first signal to transport cold and dry gas into the storage chamber, so that the storage chamber is in a slightly positive pressure state, so as to improve the environmental stability in the storage chamber during the sampling process.

[0012] In an optional embodiment, the door opening detection device includes a travel switch; when the thermal insulation door is opened, the door opening detection device senses a trigger signal, including:

[0013] When the thermal insulation door is opened, the travel switch senses that it is in a disengaged state.

[0014] In the above implementation process, the travel switch is a mechanical switch that is set at the contact position or door frame, and its open and closed state can be triggered by the movement of the thermal insulation door. Specifically, 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 and sensing a trigger signal. 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. In addition, since the manufacturing and maintenance costs of the travel switch are relatively low, the use of this switch can reduce the control effect and control cost of the entire biological sample storage system.

[0015] In an optional embodiment, the door opening detection device includes a magnetic sensor and a magnet; the magnet is disposed at one of a contact position or a door frame, and the magnetic sensor is disposed at the other of a contact position or a door frame; when the thermal insulation door is opened, the door opening detection device senses a trigger signal, including:

[0016] When the thermal insulation door is opened, the relative position of the magnetic sensor and the magnet changes, and the magnetic sensor senses the change in the magnetic field.

[0017] In the above implementation process, the door opening detection device uses 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 contact position or in the door frame. At the same time, a magnet is set at the relative position of the magnetic sensor. For example, the magnetic sensor is set at the contact position, and the magnet is set at the position corresponding to the magnetic sensor on the door frame, or the magnet is set at the contact position, and the magnetic sensor is set at the position corresponding to the magnet on the door frame. When the thermal insulation door is opened, the relative position between the magnetic sensor and the magnetic field will change, and the magnetic sensor will sense the change in the magnetic field. When the magnetic sensor senses the change in the magnetic field, it senses a trigger signal and immediately sends a first signal to the control system.

[0018] The use of a magnetic sensor in this embodiment offers the following advantages: The magnetic sensor can precisely detect changes in the magnetic field, resulting in high sensitivity. This means that even a slight opening of the thermal door can be accurately detected by the magnetic sensor. Furthermore, since the magnetic sensor and the magnet interact via the magnetic field, there is no actual physical contact between them. This avoids wear and malfunction caused by prolonged friction, thereby improving control effectiveness.

[0019] In an optional embodiment, the door opening detection device includes a pressure sensor, which is arranged at a contact position or the door frame; when the thermal insulation door is opened, the door opening detection device senses a trigger signal, including:

[0020] When the thermal door is opened, the pressure sensor senses the pressure change between the contact point and the door frame.

[0021] In the above implementation, the pressure sensor is a device that can sense changes in pressure. When the pressure applied to the pressure sensor changes, its resistance value or output voltage changes. The pressure sensor is placed at a contact point or door frame. When the insulated door is opened, the distance between the contact point and the door frame changes, and therefore the pressure applied to the pressure sensor by the contact point and the door frame also changes. When the pressure sensor senses the pressure change, it senses a trigger signal and immediately transmits a first signal to the control system.

[0022] The use of a pressure sensor in this embodiment can bring the following advantages: the pressure sensor directly senses the contact pressure between the contact position and the door frame, the detection result is intuitive and accurate, and the control effect can be improved.

[0023] In an optional embodiment, the sensing module includes a human body detection device, which is provided on the thermal insulation door; when the sensing module senses a trigger signal, it sends a first signal to the control system, including:

[0024] When a user stands in front of the thermal insulation door, the human body detection device monitors the user information, senses the trigger signal, and sends a first signal to the control system.

[0025] In the above implementation process, before opening the thermal insulation door, the user usually stands in front of the thermal insulation door, and then performs the subsequent door opening operation. Therefore, the present application example sets a human body detection device at the thermal insulation door. When the user stands in front of the thermal insulation door, the human body detection device can monitor the human body information and sense the trigger signal, and send a first signal to the control system, thereby timely delivering cold and dry gas to the storage chamber before the thermal insulation door is opened. In addition, considering that it takes a certain response time for the cold and dry air supply device to be turned on and form a micro-positive pressure environment in the storage chamber, this embodiment uses the human body detection device to control the cold and dry gas supply device to deliver cold and dry gas to the storage chamber through the control system in advance before the thermal insulation door is opened. When the thermal insulation door is opened for sampling, a micro-positive pressure environment has been formed in the storage chamber.

[0026] In an optional embodiment, the human body detection device includes an infrared sensor; when a user stands in front of the thermal insulation door, the human body detection device monitors user information and senses a trigger signal, including:

[0027] When the user stands in front of the thermal insulation door, the infrared rays emitted by the infrared sensor are blocked or reflected by the user, and the user information is monitored, and a trigger signal is sensed.

[0028] In the above implementation, an infrared sensor is installed at the thermal door. When a user stands in front of the thermal door, the infrared light emitted by the infrared sensor is reflected or blocked by the user. The infrared sensor can detect this reflected or blocked infrared light to determine whether a person is in front of the thermal door. When the infrared light is detected to be blocked or reflected, the infrared sensor senses a trigger signal and immediately sends a first signal to the control system.

[0029] The use of infrared sensors in this embodiment offers the following advantages: They can quickly detect the presence of a person and quickly send a signal to the control system, ensuring a timely response. They are also resistant to changes in light and other interference factors, enabling stable operation in complex environments. By adjusting the angle at which the infrared sensor emits infrared light, it is possible to detect the presence of a person in a specific area, enabling more accurate prediction of sampling actions and improving control effectiveness.

[0030] In an optional embodiment, the human body detection device includes a microwave radar sensor; when a user stands in front of the thermal insulation door, the human body detection device monitors user information and senses a trigger signal, including:

[0031] When a user stands in front of the thermal insulation door, the microwave radar sensor emits multiple signal waves to the user. When the signal waves are bounced back, the user information is monitored and a trigger signal is sensed.

[0032] In the above implementation, a microwave radar sensor is installed at the thermal door. When a user stands in front of the door, the microwave radar sensor emits microwave signals that are reflected back upon encountering a person. By receiving and analyzing these reflected signals, the microwave radar sensor can accurately determine whether a person is in front of the door. When the microwave radar sensor detects a rebound signal, it senses a trigger signal and immediately sends a first signal to the control system.

[0033] The use of microwave radar sensors in this embodiment offers the following advantages: They can penetrate some non-metallic materials (such as clothing and glass), making detection more accurate and reliable. They are also highly adaptable to light changes and environmental interference, ensuring stable operation in various scenarios. They also have a long detection range and a wide detection area, covering a larger area in front of the insulated door and improving control effectiveness.

[0034] In an optional embodiment, the human body detection device includes a camera and a processor, the camera and the processor are connected to each other by signal, and the processor and the control system are connected by signal. When a user stands in front of the thermal insulation door, the human body detection device monitors the user information and senses a trigger signal, including:

[0035] When a user stands in front of the thermal insulation door, the user is photographed by the camera and photographing information is obtained. The photographing information is sent to the processor, and the processor receives the photographing information to obtain a trigger signal.

[0036] In the above implementation, a camera is positioned at the thermal door for real-time recording. The camera transmits the captured image to a processor, which processes and analyzes the captured image to determine whether a human body is present. When a user stands in front of the thermal door, the camera captures the human body and transmits the captured image to the processor. The processor recognizes the human body in the captured image, senses trigger information, and sends a first signal to the control system.

[0037] The use of a camera in this embodiment can bring the following advantages: the use of a camera and a processor can more clearly determine human body information, improve the accuracy of the detection results, and thus improve the control effect, avoiding the misjudgment that the thermal insulation door is about to be opened for sampling when other staff members pass by in front of the thermal insulation door.

[0038] In an optional embodiment, the sensing module includes a pre-door opening detection device, the thermal insulation door has an open door position, and the pre-door opening detection device is set at the open door position; when the sensing module senses the trigger signal, it sends a first signal to the control system, including:

[0039] Before opening the thermal insulation door, the user first touches the pre-door opening detection device, and the pre-door opening detection device senses the trigger signal and sends a first signal to the control system.

[0040] When the user is performing the door opening operation, he usually needs to touch the door opening position of the thermal insulation door first, and then open the thermal insulation door. Therefore, in the above implementation process, a pre-door opening detection device is set at the door opening position of the thermal insulation door. The user will touch the pre-door opening detection device before opening the thermal insulation door, and then the pre-door opening detection device can sense the trigger signal and send a first signal to the control system. In the embodiment of the present application, the pre-door opening detection device is set at the door opening position of the thermal insulation door, which can accurately detect whether the door opening position is touched. Once it is detected that the door opening position is touched, the pre-door opening detection device will immediately send a first signal to the control system, thereby improving the control effect.

[0041] In an optional embodiment, the pre-door opening detection device includes a push button switch; before opening the thermal insulation door, the user first touches the pre-door opening detection device, and the pre-door opening detection device senses a trigger signal, including:

[0042] Before opening the thermal insulation door, the user presses the button switch first, and the button switch senses the trigger signal.

[0043] In the above implementation process, a push button switch is set at the door opening position of the thermal insulation door. When the user touches the door opening position, he also presses the button of the push button switch at the door opening position, so that the push button switch is closed and senses the trigger signal, forming an electrical signal. This electrical signal is the first signal, which is then sent to the control system.

[0044] In an optional embodiment, the pre-door opening detection device includes a touch sensor; before opening the thermal insulation door, the user touches the pre-door opening detection device, and the pre-door opening detection device senses a trigger signal, including:

[0045] Before opening the thermal insulation door, the user first touches the touch sensor, and the touch sensor senses a trigger signal.

[0046] In the above implementation process, when sampling, the user needs to first touch the door opening position to open the thermal insulation door. A touch-sensitive sensor is set in the contact area where the hand touches the door opening position. The touch-sensitive sensor usually works based on the principle of capacitance or resistance. When the user's finger or other object touches the touch area of the touch-sensitive sensor, the touch-sensitive sensor senses a trigger signal, which changes the capacitance or resistance value of the touch-sensitive sensor, thereby generating a first signal, and sending the first signal to the control system. The control system controls the cold dry gas supply device to turn on according to the first signal. The use of the touch-sensitive sensor in this embodiment can bring the following advantages: the touch-sensitive sensor has high sensitivity and can accurately detect slight touch or contact actions. In addition, the touch-sensitive 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.

[0047] When the user touches the door opening position to open the thermal insulation door during sampling, the touch-sensitive sensor detects a trigger signal and sends a first signal to the control system. The control system receives the first signal sent by the touch-sensitive sensor and controls the cold and dry gas supply device to turn on according to the first signal. After the thermal insulation door is opened, the user's hand leaves the door opening position, and the touch-sensitive sensor no longer sends the first signal to the control system. At the same time, the door opening detection device detects that the thermal insulation door has been opened, and the door opening detection device sends the first signal to the control system. The control system still controls the cold and dry gas supply device to turn on. If the thermal insulation door is not opened, the touch-sensitive sensor does not detect a trigger signal, and the control system does not receive the first signal within a certain period of time, then controls the cold and dry gas supply device to turn off.

[0048] In an optional embodiment, the control method further includes: disposing a first gas pressure sensor in the storage chamber, the first gas pressure sensor being connected to a control system signal; controlling the cold dry gas supply device to start and deliver gas into the storage chamber so that the air pressure inside the storage chamber is greater than the air pressure outside the storage chamber, including:

[0049] The first gas pressure sensor monitors the first air pressure in the storage chamber and sends the first air pressure to the control system. When 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 turn on; when the control system 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 turn off; wherein, the second preset pressure value is higher than the first preset pressure value, and the first preset pressure value is not lower than atmospheric pressure.

[0050] In the above implementation, a first gas pressure sensor is installed in the storage chamber to maintain the stability of the ambient gas pressure within the storage chamber. The first gas pressure sensor monitors the first gas pressure within the storage chamber based on principles such as the piezoresistive effect or the piezoelectric effect. The first gas pressure sensor is connected to a control system signal, transmitting a detection signal to the control system, which then controls the opening and closing of the cold and dry gas supply device based on the first gas pressure. The first preset pressure value is not lower than atmospheric pressure. If the first gas pressure sensor detects that the air pressure in the storage chamber is lower than the first preset pressure value, it indicates that the gas pressure in the storage chamber is low. After opening the insulation door, the gas outside the storage chamber is easily poured into the storage chamber, affecting the environmental stability of the storage chamber. Therefore, it is necessary to turn on the cold and dry gas supply device; after the control system controls the cold and dry gas supply device to start supplying cold and dry gas to the storage chamber, so that the storage chamber is in a slightly positive pressure state, in order to avoid excessive gas pressure in the storage chamber and reduce unnecessary gas supply work of the cold and dry gas supply device, when the first air pressure is higher than the second preset pressure value, the control system controls the cold and dry gas supply device to close, and since the second preset pressure value is higher than the first preset pressure value, the gas pressure in the storage chamber is still higher than the first preset pressure value at this time, and the storage chamber is still in a slightly positive pressure state.

[0051] In a specific embodiment, the control logic for controlling the opening and closing of the cold and dry gas supply device based on the first air pressure has a higher priority. For example, when the sensing module detects a trigger signal and sends a first signal to the control system, the control system receives the first signal. If the control system also detects that the first air pressure is lower than a first preset pressure value, the control system controls the cold and dry gas supply device to open based on the first air pressure being lower than a second preset pressure value. For another example, when the sensing module detects a trigger signal and sends the first signal to the control system, the control system receives the first signal. If the control system also detects that the first air pressure is higher than a second preset pressure value, the control system controls the cold and dry gas supply device to close based on the first air pressure being higher than the second preset pressure value.

[0052] In an optional embodiment, the cold and dry gas supply device is connected to the storage chamber through an air outlet channel, and a solenoid valve is provided on the air outlet channel, and the solenoid valve is connected to the control system signal; the control system controls the cold and dry gas supply device to open according to the received first signal and delivers gas to the storage chamber, including:

[0053] The control system controls the solenoid valve to open according to the received first signal, so as to deliver the cold and dry air from the air outlet channel into the storage chamber.

[0054] In the above implementation process, after the control system receives the first signal, the control system can control the solenoid valve to open, thereby enabling the cold and dry gas providing device to transport the cold and dry gas into the storage chamber through the gas outlet channel.

[0055] In an optional embodiment, the cold dry gas providing device includes a cold dryer and a gas storage tank, the cold dryer and the gas storage tank are connected through an air inlet channel, an air outlet channel is provided on the gas storage tank, and the cold dryer is connected to the control system signal; the control method includes: the control system controls the cold dryer to generate cold dry gas, and transports the cold dry gas to the gas storage tank through the air inlet channel.

[0056] In the above implementation process, cold dry gas is prepared by the cold dryer and transported to the gas tank for storage. The cold dry gas in the gas tank is at a relatively high pressure. When the storage chamber needs to be filled with cold dry air, the solenoid valve of the gas tank outlet passage is simply opened to deliver the pre-prepared cold dry gas into the storage chamber, thereby improving the system's response speed. Furthermore, the cold dryer is signal-connected to the control system. After the solenoid valve is opened, if the control system determines that the first air pressure in the storage chamber is still below the first preset pressure value, the cold dryer is controlled to generate cold dry gas and transport the cold dry gas to the gas tank through the air inlet passage.

[0057] In an optional embodiment, a second gas pressure sensor is provided in the gas storage tank, and the second gas pressure sensor is connected to the control system signal; the control system controls the operation of the cold dryer to generate cold dry gas, and transports the cold dry gas to the gas storage tank through the air inlet channel, including:

[0058] The second gas pressure sensor monitors the second air pressure in the gas tank and sends the second air pressure to the control system. When the control system detects that the second air pressure is lower than the third preset pressure value, the control system controls the cold dryer to work; when the control system detects that the second air pressure is higher than the fourth preset pressure value, the control system controls the cold dryer to shut down; 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.

[0059] In the above implementation process, 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 system in real time. The control system 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 an appropriate range. Specifically, when the second air pressure in the gas tank is lower than the third preset pressure value, the control system will immediately start the cold dryer, start preparing cold dry gas and inject it into the gas tank through the air inlet channel to restore the air pressure to an appropriate range. When the second air pressure is higher than the fourth preset pressure value, the control system will control the cold dryer to shut down to prevent the air pressure in the gas tank from being too high.

[0060] In an optional embodiment, the biological sample storage system also includes a sampling door panel; the sampling door panel is arranged on the shell, and the sampling door panel is covered when the thermal insulation door is closed; the sampling door panel 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; the transfer device connects the sampling channel on one side of the plate body with the sampling channel on the other side of the plate body in the open state; when the transfer device is in the closed state, the space on both sides of the plate body is separated by the sampling door panel; the control method includes: after the air pressure inside the storage chamber is greater than the air pressure outside the storage chamber, the sampling device takes out the sample through the sampling channel of the transfer device.

[0061] In the above implementation process, when the user needs to access a biological sample, they can first open the thermal insulation door, then use the sampling device to apply external force to open the transfer device of the sampling door panel. The sampling device then extends into the storage chamber through the sampling channel to retrieve and place the biological sample. To prevent gas from outside the storage chamber from entering the storage chamber during the process of accessing the biological sample, the control method provided in the example of this application is such that after the air pressure inside the storage chamber exceeds the air pressure outside the storage chamber, the sampling device then retrieves the sample through the sampling channel of the transfer device. In other words, after the thermal insulation door is opened and the control system activates the cold dry gas supply device to form a slight positive pressure in the storage chamber, the sampling device is then used to retrieve and place the biological sample from the transfer device of the sampling door panel.

[0062] In an optional embodiment, the transfer device includes at least one elastic diaphragm, each diaphragm including a plurality of circumferentially arranged elastic portions. When the elastic portions are abutted, the elastic portions deform to open the transfer device; when the elastic portions are reset, the transfer device is closed. The sampling device extracts a sample through a sampling channel of the transfer device, including:

[0063] The sampling device passes through the gaps between the multiple diaphragms to deform the diaphragms to form sampling channels. The sampling device takes out the sample and separates it from the diaphragms, and the diaphragms are reset.

[0064] In the above implementation, when a biological sample is needed, the sampling device passes through the gaps between the multiple diaphragms, deforming the elastic portions of the diaphragms to form a sampling channel. The sampling device then extends through the sampling channel into the storage chamber to obtain the biological sample. The sampling device then exits the sampling channel, causing the diaphragms to reset and automatically closing the transfer device. Sampling is performed via the transfer device located on the sampling door panel, and the diaphragm of the transfer device automatically opens or closes based on the force applied to the sampling device, rather than requiring the sampling door panel to be opened for sampling. Therefore, when sampling is performed, the sampling channel connecting the storage chamber to the atmosphere is smaller, and the sampling channel is easily opened and closed, which helps maintain a stable environment within the storage chamber.

[0065] In an optional embodiment, the interior of the housing further includes an operating room, the operating room and the storage room are optionally connected, and the heat preservation door is provided in the operating room;

[0066] The control method also includes: when the sensing module senses the trigger signal, it sends a second signal to the control system, and the control system controls the cold dry gas supply device to deliver gas to the operating room according to the received second signal, so that the air pressure inside the storage room is greater than the air pressure inside the operating room, and the air pressure inside the operating room is greater than the external atmospheric pressure; wherein the trigger signal is a signal monitored when the user opens the door or intends to open the door.

[0067] In the above implementation process, when the user opens the door or intends to open the door, the sensing module will sense the trigger signal and transmit the second signal to the control system. The control system receives the second signal and controls the cold and dry gas supply device to supply cold and dry gas to the operating room, so that the air pressure in the operating room is greater than the external atmospheric pressure, maintaining a slightly positive pressure state, thereby reducing the probability of gas from the external atmospheric environment entering the operating room after opening the thermal insulation door. At the same time, when the user opens the door or intends to open the door, the sensing module will sense the trigger signal and transmit the first signal to the control system. The control system receives the first signal and controls the cold and dry gas supply device to start supplying cold and dry gas to the storage room, so that the air pressure in the storage room is greater than the air pressure in the operating room. When the manipulator in the operating room extends into the storage room to take samples, the probability of gas from the operating room entering the storage room can be reduced, further improving the environmental stability of the storage room.

[0068] In an optional embodiment, a third gas pressure sensor is provided in the operating chamber, and the third gas pressure sensor is connected to the control system signal; controlling the cold dry gas supply device to start and deliver gas to the operating chamber so that the air pressure inside the storage chamber is greater than the air pressure inside the operating chamber, and the air pressure inside the operating chamber is greater than the external atmospheric pressure, includes:

[0069] The third gas pressure sensor monitors the third air pressure in the operating chamber and sends the third air pressure to the control system. When the control system detects that the third air pressure is lower than the fifth preset pressure value, the control system controls the cold and dry gas supply device to deliver gas into the operating chamber; when the control system detects that the third air pressure is higher than the sixth preset pressure value, the control system controls the cold and dry gas supply device to stop delivering gas into the operating chamber; 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 of the storage chamber.

[0070] In the above implementation, the third air pressure sensor monitors the third air pressure within the operating chamber. The control system controls the air pressure within the operating chamber within an appropriate range based on the third air pressure. Specifically, the third air pressure within the operating chamber should be lower than the first air pressure within the storage chamber to prevent air from flowing into the storage chamber. Furthermore, the third air pressure within the operating chamber should be higher than the external atmospheric pressure to prevent air from the external environment from flowing into the operating chamber when the thermal door is opened.

[0071] In an optional embodiment, the operating room and the storage room are separated by an automatic door, a manipulator is provided in the operating room, and both the manipulator and the automatic door are connected to the control system signal; the control method also includes: the control system controls the automatic door to open, and then the manipulator extends from the opened automatic door into the storage room to take samples, and transfers them to the operating room, and then extends from the operating room, and the user takes samples on the extended manipulator.

[0072] In the above implementation process, the manipulator and the automatic door are connected to the control system signal. After the control system controls the air pressure in the storage room to be higher than the air pressure in the operating room, the control system controls the automatic door to open, and controls the manipulator to extend into the storage room from the opened automatic door to take samples, and transfer to the operating room, and then extend from the operating room. The user takes samples on the extended manipulator, which can further improve the environmental stability and sampling convenience in the storage room.

[0073] In an optional embodiment, the control method further includes:

[0074] The sensing module senses that the trigger signal disappears and sends a third signal to the control system. The control system controls the cold and dry gas providing device to be turned off according to the received third signal.

[0075] In the above implementation process, after the insulation door is closed, the sensing module senses that the trigger signal disappears and sends a third signal to the control system. The control system controls the cold and dry gas supply device to close according to the third signal and stops supplying cold and dry gas to the storage chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0077] Figure 1 A schematic structural diagram of a first biological sample storage system provided in an embodiment of the present application;

[0078] Figure 2 A schematic structural diagram of a storage chamber of a first biological sample storage system provided in an embodiment of the present application;

[0079] Figure 3 This is a functional module diagram of the sensing module, control system, and cold dry gas providing device in the biological sample storage system provided in an embodiment of the present application;

[0080] Figure 4 A first control flow diagram of a biological sample storage system provided as an example of this application;

[0081] Figure 5 A second control flow diagram of a biological sample storage system provided as an example of this application;

[0082] Figure 6 A third control flow diagram of a biological sample storage system provided as an example of this application;

[0083] Figure 7 A schematic structural diagram of a second biological sample storage system provided in an embodiment of the present application;

[0084] Figure 8 A schematic diagram of a fourth control flow of the biological sample storage system provided in an embodiment of the present application;

[0085] Figure 9 This is a schematic structural diagram of the third biological sample storage system provided in an embodiment of the present application.

[0086] Icon: 100-biological sample storage system; 1-shell; 11-storage chamber; 12-operation chamber; 2-insulated door; 3-cold dry gas supply device; 4-sensing module, 41-door opening detection device, 42-human body detection device, 43-pre-door opening detection device, 5-control system; 6-sampling door panel; 61-plate body; 62-transfer device; 7-automatic door; 8-manipulator. DETAILED DESCRIPTION

[0087] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0088] Please combine Figure 1 and Figure 2 The biological sample storage system 100 generally includes a housing 1 and a heat preservation door 2 . The heat preservation door 2 is openably and closably arranged on the housing 1 . The interior of the housing 1 includes a storage chamber 11 .

[0089] In the biological sample storage system 100, since the preservation of biological samples requires a strict low-temperature and low-humidity environment, an openable and closable thermal insulation door 2 is usually provided on the shell 1. When the thermal insulation door 2 is closed, the internal environment of the storage chamber 11 can be better maintained; when the thermal insulation door 2 is opened, it is convenient for the user or the sampling device to reach into the storage chamber 11 to take and place the biological sample.

[0090] However, when the thermal insulation door 2 is opened to take and place biological samples, gas exchange will inevitably occur in the storage chamber 11, that is, the low-temperature and low-humidity gas in the storage chamber 11 is exchanged with the gas in the external space environment, and the higher temperature and higher humidity air in the external space environment enters the storage chamber 11, which will destroy the stable environment in the storage chamber 11.

[0091] Furthermore, the applicant has discovered that due to the relatively low ambient temperature and pressure within the storage chamber 11, once the thermal door 2 is opened, outside air will flow into the storage chamber 11. Therefore, one or more embodiments of the present application provide a control method for a biological sample storage system 100 to address the issue of the environmental stability of the storage chamber 11 being affected by the exchange of gases between the inside and outside of the storage chamber 11 during sampling.

[0092] In order to reduce the probability of gas outside the storage chamber 11 entering the storage chamber 11 during the sampling process, when the insulation door 2 is opened or there is an intention to open the door, the cold dry gas providing device 3 can be used to transport cold dry gas into the storage chamber 11, so that the air pressure inside the storage chamber 11 is higher than the air pressure outside the storage chamber 11.

[0093] In order to facilitate the control of the cold and dry gas supply device 3 to start when the heat preservation door 2 is opened or there is an intention to open the door, the cold and dry gas is delivered to the storage chamber 11. Figure 3 , a sensing module 4 and a control system 5 can be set in the biological sample storage system 100.

[0094] See also Figure 4 The present application example provides a control method for a biological sample storage system 100, including:

[0095] S1. When the sensing module 4 senses a trigger signal, it sends a first signal to the control system 5. The trigger signal is a signal detected when the user opens the door or intends to open the door.

[0096] When the user opens the door or intends to open the door, the sensing module 4 can sense the trigger signal and send a first signal to the control system 5. The sensing module 4 senses the trigger signal, which means that the thermal insulation door 2 is open or about to open, and then sends the first signal to the control system 5 so that the control system 5 can take subsequent actions based on the first signal.

[0097] The present application does not limit how the sensing module 4 senses the trigger signal when the user opens the door or intends to open the door, and sends the first signal to the control system 5. In some possible embodiments, the sensing module 4 can sense the opening and closing of the thermal insulation door 2, and can also sense whether there is a person preparing to take samples in front of the thermal insulation door 2, and can also sense whether the user is opening the thermal insulation door 2.

[0098] In some possible embodiments, the sensing module 4 may include a door opening detection device 41. The housing 1 generally has a door frame for contacting the thermal insulation door 2. The thermal insulation door 2 has a contact position for contacting the door frame when closed. The door opening detection device 41 is provided at one or both of the contact position and the door frame. Figure 5 When the sensing module 4 senses the trigger signal, it sends a first signal to the control system, including:

[0099] S11 , when the thermal insulation door 2 is opened, the door opening detection device 41 senses a trigger signal and sends a first signal to the control system 5 .

[0100] Since the contact condition between the contact position and the door frame will change when the thermal insulation door 2 is opened, a door opening detection device 41 is set at at least one of the contact position and the door frame. When the contact condition between the contact position and the door frame changes, the door opening detection device 41 can sense the trigger signal and send a first signal to the control system 5.

[0101] The door opening detection device 41 can accurately monitor the opening status of the thermal insulation door 2, avoiding erroneous operation due to misjudgment or missed judgment. Once the thermal insulation door 2 is opened, the door opening detection device 41 can immediately send a first signal to the control system 5, so that the control system 5 can activate the cold dry gas supply device 3.

[0102] Furthermore, the present application does not limit how the door opening detection device 41 senses a trigger signal when the contact condition between the contact position and the door frame changes. In some possible embodiments, the door opening detection device 41 may be a simple mechanical switch. When the thermal insulation door 2 is opened, the mechanical switch is triggered, thereby sending a first signal to the control system 5. Alternatively, it may be a more advanced electronic sensor, such as an infrared sensor or a magnetic sensor, which can more accurately monitor the opening status of the thermal insulation door 2.

[0103] For example, the door opening detection device 41 may be a travel switch. Figure 5 When the thermal insulation door 2 is opened, the door opening detection device 41 senses a trigger signal, including:

[0104] S111. When the thermal insulation door 2 is opened, the travel switch senses that it is in a disengaged state.

[0105] The travel switch is a mechanical switch, which is set at the contact position or the door frame, and its opening and closing states can be triggered by the movement of the thermal insulation door 2.

[0106] Specifically, when the thermal door 2 opens, it loses contact with the travel switch, thereby changing its electrical signal state. The travel switch senses the trigger signal and transmits a first signal to the control system 5. For example, if the travel switch is set in a contact position, when the thermal door 2 opens, the travel switch is out of contact with the door frame, the electrical signal state of the travel switch changes, and the first signal is transmitted to the control system 5. For another example, if the travel switch is set in the door frame, when the thermal door 2 opens, the travel switch is out of contact with the contact position, the electrical signal state of the travel switch changes, and the first signal is transmitted to the control system 5.

[0107] Exemplarily, the door opening detection device 41 may be a magnetic sensor and a magnet; the magnet is disposed at one of the contact position or the door frame, and the magnetic sensor is disposed at the other of the contact position or the door frame. Figure 5 When the thermal insulation door 2 is opened, the door opening detection device 41 senses a trigger signal, including:

[0108] S112. When the thermal insulation door 2 is opened, the relative position between the magnetic sensor and the magnet changes, and the magnetic sensor senses the change in the magnetic field.

[0109] The door opening detection device 41 uses a magnetic sensor, which is a device that can sense changes in the magnetic field and has high precision and high reliability. The magnetic sensor is set at the contact position or in the door frame. At the same time, a magnet is set at the relative position of the magnetic sensor. For example, the magnetic sensor is set at the contact position, and the magnet is set at the position corresponding to the magnetic sensor on the door frame, or the magnet is set at the contact position, and the magnetic sensor is set at the position corresponding to the magnet on the door frame. When the thermal insulation door 2 is opened, the relative position between the magnetic sensor and the magnetic field will change, and the magnetic sensor will sense the change in the magnetic field. When the magnetic sensor senses the change in the magnetic field, it senses a trigger signal and immediately sends a first signal to the control system 5.

[0110] Furthermore, the magnetic sensor may be selected from a Hall effect sensor, a magnetoresistive sensor or a permanent magnetic sensor.

[0111] For example, the door opening detection device 41 may be a pressure sensor. The pressure sensor is provided at the contact position or the door frame. Figure 5 When the thermal insulation door 2 is opened, the door opening detection device 41 senses a trigger signal, including:

[0112] S113. When the thermal insulation door 2 is opened, the pressure sensor senses the pressure change between the contact position and the door frame.

[0113] A pressure sensor is a device that can sense changes in pressure. When the pressure applied to the pressure sensor changes, its resistance or output voltage changes. The pressure sensor is placed at a contact point or door frame. When the thermal door is opened, the distance between the contact point and the door frame changes, causing the pressure applied to the pressure sensor by the contact point and the door frame to change. When the pressure sensor senses the pressure change, it senses a trigger signal and immediately transmits a first signal to the control system 5.

[0114] Exemplarily, the pressure sensor can be selected from piezoresistive, capacitive, inductive or piezoelectric types. Among them, the piezoresistive pressure sensor is made by using the piezoresistive effect of single crystal silicon material and integrated circuit technology. It has the advantages of high sensitivity, high precision and wide measurement range, but it is easily affected by temperature and needs to take temperature compensation measures. The capacitive pressure sensor converts pressure into capacitance and measures pressure by measuring the change in capacitance. It has the advantages of high resolution, good stability and long life, but it is easily affected by temperature and humidity and needs to take corresponding compensation measures. The inductive pressure sensor uses the principle of electromagnetic induction to convert pressure into inductance. It has the advantages of wide measurement range, strong anti-interference ability and high stability, but it is large in size and not suitable for miniaturized applications. The piezoelectric pressure sensor uses the principle of piezoelectric effect to convert pressure into electrical energy. It has the advantages of high sensitivity, fast response speed and small size, but the output signal is small and amplification measures need to be taken.

[0115] Alternatively, in some other possible embodiments, the sensing module 4 may include a human body detection device 42, which is disposed on the thermal insulation door 2; Figure 5 When the sensing module 4 senses the trigger signal, it sends a first signal to the control system 5, including:

[0116] S12 , when the user stands in front of the thermal insulation door 2 , the human body detection device 42 monitors the user information, senses the trigger signal, and sends a first signal to the control system 5 .

[0117] Usually, before opening the thermal insulation door 2, the user will stand in front of the thermal insulation door 2, and then perform the subsequent door opening operation. In the embodiment of the present application, a human body detection device 42 is set at the thermal insulation door 2. When the user stands in front of the thermal insulation door, the human body detection device 42 can monitor the human body information and sense the trigger signal, and send a first signal to the control system 5, so that cold and dry gas can be delivered to the storage chamber 11 in time before the thermal insulation door 2 is opened. In addition, considering that it takes a certain response time for the cold and dry gas supply device 3 to be turned on and a micro-positive pressure environment to be formed in the storage chamber 11, this embodiment uses the human body detection device 42 to control the cold and dry gas supply device 3 to deliver cold and dry gas to the storage chamber 11 through the control system 5 in advance before the thermal insulation door 2 is opened. When the thermal insulation door 2 is opened for sampling, a micro-positive pressure environment (a micro-positive pressure environment generally refers to 200-400Pa higher than the standard atmospheric pressure) has been formed in the storage chamber 11.

[0118] Furthermore, the present application does not limit how the human body detection device 42 monitors user information, senses a trigger signal, and sends a first signal to the control system 5 when the user stands in front of the thermal insulation door 2. In some possible embodiments, an infrared sensor or a radar sensor can be used. These sensors can transmit and receive signals, and the sensor can determine whether there is a person in front of the thermal insulation door 2 by analyzing changes in the signal. When a human body is detected, the sensor will immediately send a first signal to the control system 5. Alternatively, a camera can be set at the thermal insulation door 2, and a processor can be used to perform human body recognition on the real-time image captured by the camera. When human body information is recognized, the processor immediately sends a first signal to the control system 5.

[0119] Exemplarily, the human body detection device 42 includes an infrared sensor; please continue to refer to Figure 5 When a user stands in front of the thermal insulation door, the human body detection device 42 monitors the user information and senses the trigger signal, including:

[0120] S121. When a user stands in front of the thermal insulation door, the infrared rays emitted by the infrared sensor are blocked or reflected by the user, and the user information is monitored, thereby sensing a trigger signal.

[0121] When infrared light from an infrared sensor encounters a human body, it is reflected or blocked. The infrared sensor detects this reflected or blocked infrared light and determines whether a person is in front of the thermal door. When the infrared light is detected to be blocked or reflected, the infrared sensor senses a trigger signal and immediately sends a first signal to the control system.

[0122] Exemplarily, the human body detection device 42 includes a microwave radar sensor; please continue to refer to Figure 5 When a user stands in front of the thermal insulation door, the human body detection device 42 monitors the user information and senses the trigger signal, including:

[0123] S122. When a user stands in front of the thermal insulation door, the microwave radar sensor transmits multiple signal waves to the user. When the signal waves are bounced back, user information is monitored and a trigger signal is sensed.

[0124] A microwave radar sensor is installed at thermal door 2. When a user stands in front of thermal door 2, the microwave radar sensor emits microwave signal waves that are reflected back when they encounter a person. By receiving and analyzing these reflected signal waves, the microwave radar sensor can accurately determine whether a person is in front of thermal door 2. When the microwave radar sensor detects a rebound signal wave, it senses a trigger signal and immediately sends a first signal to control system 5.

[0125] Exemplarily, the human body detection device 42 includes a camera and a processor, the camera and the processor are connected by signal, and the processor and the control system are connected by signal; please continue to refer to Figure 5 When a user stands in front of the thermal insulation door, the human body detection device 42 monitors the user information and senses the trigger signal, including:

[0126] S123. When the user stands in front of the thermal insulation door, the user is photographed by the camera and photographing information is obtained. The photographing information is sent to the processor, and the processor receives the photographing information to obtain a trigger signal.

[0127] A camera is provided at the thermal door 2 for real-time recording. The camera transmits the captured images to a processor, which processes and analyzes the captured images to determine whether a human body is present. When a user stands in front of the thermal door, the camera captures the human body and transmits the captured images to the processor. The processor recognizes the human body in the captured images, senses trigger information, and sends a first signal to the control system 5.

[0128] Alternatively, in some other possible embodiments, the sensing module 4 may include a pre-door opening detection device 43, the thermal insulation door 2 has an open door position, and the pre-door opening detection device 43 is set at the open door position; please continue to refer to Figure 5 When the sensing module 4 senses the trigger signal, it sends a first signal to the control system 5, including:

[0129] S13 , before opening the thermal insulation door, the user first touches the pre-door opening detection device 43 , and the pre-door opening detection device 43 senses a trigger signal and sends a first signal to the control system 5 .

[0130] When the user performs the door opening operation, they usually need to first touch the door opening position of the thermal insulation door 2 and then open the thermal insulation door 2. Therefore, a pre-door opening detection device 43 is provided at the door opening position of the thermal insulation door 2. Before opening the thermal insulation door, the user touches the pre-door opening detection device 43, which can then sense a trigger signal and send a first signal to the control system 5.

[0131] The pre-door opening detection device 43 is set at the door opening position of the thermal insulation door 2, which can accurately detect whether the door opening position is touched. Once it is detected that the door opening position is touched, the pre-door opening detection device 43 will immediately send a first signal to the control system, thereby improving the control effect.

[0132] Furthermore, the present application does not limit how the pre-door opening detection device 43 senses the trigger signal after the user touches it and sends the first signal to the control system 5. In some possible embodiments, the pre-door opening detection device 43 can be implemented using a variety of technologies, such as a pressure sensor, a capacitance sensor, or an infrared sensor. When someone touches 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 has been touched. Once it is detected that the door opening position has been touched, the pre-door opening detection device 43 will immediately send a first signal to the control system.

[0133] Exemplarily, the pre-door opening detection device 43 includes a key switch; please continue to refer to Figure 5 Before opening the thermal insulation door 2, the user first contacts the pre-door opening detection device 43. The pre-door opening detection device 43 senses a trigger signal, including:

[0134] S131. Before opening the thermal insulation door, the user presses the key switch, and the key switch senses a trigger signal.

[0135] When the user touches the door opening position, he also presses the button of the key switch on the door opening position to close the key switch. The key switch senses the trigger signal and forms an electrical signal. This electrical signal is the first signal, which is then sent to the control system.

[0136] Exemplarily, the key switch can be a switch with a mechanical locking function. When the button is pressed for the first time, the key switch is turned on and remains in a self-locking state. Even if the button is released, the key switch remains in a closed state. When the button is pressed again, the key switch is disconnected, and the button pops out. In this embodiment, when the user opens the thermal insulation door 2 by touching 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 2, the control system 5 continues to receive the first signal, and the cold dry gas supply device 3 continues to be turned on. After the user completes the sampling, the thermal insulation door 2 is closed by touching the door opening position for the second time, the key switch is disconnected, the button automatically pops out, and the cold dry gas supply device 3 is turned off. If the user does not touch the key switch when closing the thermal insulation door 2, and the cold dry gas supply device 3 is not turned off, the user can press the key switch again to turn off the cold dry gas supply device 3.

[0137] For example, the push button switch may also be a switch without a mechanical locking function. When the button is pressed, the control system 5 receives a first signal from the push button switch. When the button is released, the control system 5 does not receive the first signal. If the control system 5 does not receive the first signal within a certain period of time, the cold and dry gas supply device 3 is controlled to be turned off. When the user is taking a sample, they hold the door open position and pull open the thermal insulation door 2 while pressing the button. The control system 5 receives the first signal from the push button switch and controls the cold and dry gas supply device 3 to be turned on based on the first signal.

[0138] Furthermore, after the thermal door 2 is opened, the button is released, and the push-button switch no longer sends the first signal. At this point, the door opening detection device 41 can detect that the thermal door 2 has been opened, and the door opening detection device 41 sends the first signal to the control system 5, which continues to control the cold and dry gas supply device 3 to turn on. If the thermal door 2 is not opened, the button is released, and the control system 5 does not receive the first signal within a certain period of time, it controls the cold and dry gas supply device 3 to turn off.

[0139] Exemplarily, the pre-door opening detection device 43 includes a touch-sensitive sensor; please continue to refer to Figure 5 Before opening the thermal insulation door, the user first touches the pre-door opening detection device, and the pre-door opening detection device 43 senses the trigger signal, including:

[0140] S132: Before opening the thermal insulation door, the user first touches the touch sensor, and the touch sensor senses a trigger signal.

[0141] When sampling, the user first needs to touch the door opening position to open the thermal insulation door 2. A touch sensor is provided in the contact area where the hand touches the door opening position. The touch sensor generally operates based on capacitance or resistance principles. When the user's finger or other object touches the touch area of the touch sensor, the touch sensor senses a trigger signal, which changes the capacitance or resistance value of the touch sensor, thereby generating a first signal. The first signal is sent to the control system 5, and the control system 5 controls the cold dry gas supply device 3 to open according to the first signal.

[0142] Furthermore, after the thermal door 2 is opened, the user's hand leaves the door-opening position, and the touch sensor no longer senses the trigger signal and no longer sends the first signal to the control system 5. At this point, the door-opening detection device 41 can detect that the thermal door 2 has been opened, and the door-opening detection device 41 sends the first signal to the control system 5, which continues to control the cold and dry gas supply device 3 to turn on. If the thermal door 2 is not opened, the touch sensor also detects no trigger signal, and the control system 5 fails to receive the first signal within a certain period of time, it controls the cold and dry gas supply device 3 to turn off.

[0143] Furthermore, the present application does not limit the specific type of the touch sensing sensor. In some possible embodiments, the touch sensing sensor may be selected from a capacitive touch sensor, a piezoresistive touch sensor, or an optical touch sensor.

[0144] Exemplarily, the touch sensing sensor can be selected from a capacitive tactile sensor. A capacitive tactile 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. A capacitive tactile sensor is usually composed 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 a change in capacitance. Capacitive tactile sensors have the advantages of simple structure, high sensitivity, fast response speed, and wide dynamic range.

[0145] Exemplarily, the touch sensing sensor can be selected from a piezoresistive tactile sensor. A piezoresistive tactile sensor is a sensor based on the piezoresistive effect. Its 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 a piezoresistive effect, such as semiconductor materials such as silicon and germanium. When external pressure acts on the sensor, the resistance value of the material changes. By measuring the change in resistance value, the magnitude of the 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.

[0146] Exemplarily, the touch-sensing sensor can be selected from an optical tactile sensor. An optical tactile sensor is a tactile sensor based on optical principles. Its working principle is generally to perceive 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 generally includes a light source, an optical system, a photoelectric conversion device, and other parts. When an external object contacts the sensor surface, it causes reflection or scattering of light. By measuring the changes in the reflected or scattered light, information about the external object can be perceived. Optical tactile sensors have the advantages of non-contact measurement, high resolution, and high sensitivity.

[0147] For further information, please refer to Figure 4 The control method of the biological sample storage system provided in the embodiment of the present application further includes:

[0148] S2. The control system 5 controls the cold dry gas providing device 3 to start according to the received first signal, and delivers gas into the storage chamber 11 so that the air pressure inside the storage chamber 11 is greater than the air pressure outside the storage chamber 11.

[0149] When the control system 5 receives the first signal transmitted by the sensing module 4, the control system 5 will immediately turn on the cold and dry gas providing device 3 to supply cold and dry gas into the storage chamber 11, so that the air pressure inside the storage chamber 11 is greater than the air pressure outside the storage chamber 11, thereby reducing the probability of gas outside the storage chamber 11 being injected into the storage chamber 11 during the sampling process, improving the environmental stability of the storage chamber 11, and thereby improving the storage quality of the biological sample storage system 100.

[0150] Furthermore, the present application does not limit how the control system 5 controls the cold and dry gas providing device 3 to turn on after receiving the first signal. In a possible embodiment, the cold and dry gas providing device 3 includes a cold dryer and a gas storage tank. The cold dryer and the gas storage tank are connected through an air inlet channel. An air outlet channel is provided on the gas storage tank, and the air outlet channel is connected to the storage chamber 11. The cold dryer is connected to the control system 5 signal.

[0151] See also Figure 6 , control methods include:

[0152] S21 , the control system 5 controls the cold dryer to generate cold dry gas, and transmits the cold dry gas to the gas storage tank through the air inlet channel.

[0153] After receiving the first signal, the control system 5 controls the cold dryer to generate cold dry gas, and transports the cold dry gas to the gas storage tank through the air inlet channel. The gas storage tank transports the cold dry gas to the storage chamber 11 through the air outlet channel.

[0154] Furthermore, in order to facilitate the use of the control system 5 to control the opening or closing of the cold dryer, in a possible embodiment, a second gas pressure sensor is set in the gas storage tank, and the second gas pressure sensor is connected to the control system 5 signal; please continue to refer to Figure 6 The control system 5 controls the operation of the cold dryer to generate cold dry gas, and transports the cold dry gas to the gas storage tank through the air inlet channel, including:

[0155] S211. The second gas pressure sensor monitors the second air pressure in the gas storage tank and sends the second air pressure to the control system 5. When the control system 5 detects that the second air pressure is lower than the third preset pressure value, the control system 5 controls the cold dryer to work; when the control system 5 detects that the second air pressure is higher than the fourth preset pressure value, the control system controls the cold dryer to shut down; 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.

[0156] Furthermore, a solenoid valve can be provided on the air outlet channel to connect the solenoid valve to the control system 5 signal; please continue to refer to Figure 6 The control system 5 controls the cold and dry gas supply device 3 to start according to the received first signal and delivers gas to the storage chamber, including:

[0157] S22 , the control system 5 controls the solenoid valve to open according to the received first signal, and delivers the cold dry air from the air outlet channel to the storage chamber 11 .

[0158] The solenoid valve is connected to the control system 5 signal, and the control system 5 can be used to automatically open or close the solenoid valve to transport the cold dry gas in the storage tank to the storage chamber 11.

[0159] By connecting both the cold dryer and the solenoid valve to the control system 5, the control system can activate only the solenoid valve without activating the cold dryer when the cold dry gas stored in the storage tank is sufficient. When the cold dry gas stored in the storage tank is low, the control system 5 activates both the cold dryer and the solenoid valve. Alternatively, if the control system 5 does not receive the first signal but determines that the cold dry gas in the storage tank is low, the control system 5 can activate only the cold dryer without activating the solenoid valve, and deactivate the cold dryer when it determines that the second air pressure in the storage tank is within an appropriate pressure range.

[0160] Furthermore, the cold-drying gas provided by the cold-drying machine can be selected from cold-drying air or cold-drying nitrogen. The cold-drying machine can adopt an existing air-cooled cold-drying machine or a water-cooled cold-drying machine.

[0161] For example, the cold dryer can utilize a refrigerant to perform heat exchange on the compressed air to form cold and dry air.

[0162] For example, the cold dryer can utilize a refrigerant to heat exchange compressed nitrogen to form cold, dry nitrogen. When the control system 5 receives the first signal and turns on the cold, dry gas supply device 3, after a certain period of operation, the cold, dry gas supply device 3 is turned off to stop supplying cold, dry gas. To prevent the cold, dry gas supply device 3 from continuously delivering excessive cold, dry gas to the storage chamber 11, which could result in excessive pressure within the storage chamber 11, the cold, dry gas supply device 3 is turned off to stop delivering cold, dry gas. However, if the pressure within the storage chamber 11 is low when the cold, dry gas supply device 3 is turned off, this could affect the environmental stability of the storage chamber 11.

[0163] Therefore, in order to prevent the air pressure in the storage chamber 11 from being too low after the cold dry gas supply device 3 is turned off, thereby affecting the environmental stability of the storage chamber 11, and to prevent the air pressure in the storage chamber 11 from being too high, in some possible embodiments, a first gas pressure sensor is provided in the storage chamber 11, and the first gas pressure sensor is connected to the control system 5 for signal connection; please continue to refer to Figure 6 , controlling the cold dry gas supply device 3 to open and deliver gas to the storage chamber 11 so that the air pressure inside the storage chamber 11 is greater than the air pressure outside the storage chamber 11, including:

[0164] S221. The first gas pressure sensor monitors the first air pressure in the storage chamber 11 and sends the first air pressure to the control system 5. When the control system 5 detects that the first air pressure is lower than the first preset pressure value, the control system 5 controls the cold and dry gas providing device 3 to turn on; when the control system 5 detects that the first air pressure is higher than the second preset pressure value, the control system 5 controls the cold and dry gas providing device 3 to turn off; wherein, the second preset pressure value is higher than the first preset pressure value, and the first preset pressure value is not lower than atmospheric pressure.

[0165] When the sensing module 4 detects the trigger signal and sends the first signal to the control system 5, the control system 5 receives the first signal. If the control system 5 also detects that the first air pressure is lower than the first preset pressure value, the control system 5 controls the cold dry gas providing device 3 to turn on.

[0166] In some cases, when the user opens the thermal insulation door 2 or intends to open the door, the air pressure in the storage chamber 11 is already in a slightly positive state. For example, after the user completes the previous sampling, when the storage chamber 11 is still in a slightly positive state, the user immediately performs the next sampling. At this time, when the sensing module 4 detects the trigger signal after detecting the door opening or the intention to open the door, the storage chamber 11 is already in a slightly positive state. If the control system 5 continues to control the cold and dry gas supply device 3 to start supplying cold and dry gas to the storage chamber 11, the air pressure in the storage chamber 11 may become too high.

[0167] In an embodiment of the present application, when the sensing module 4 detects the trigger signal and sends a first signal to the control system 5, the control system 5 receives the first signal. If the control system 5 simultaneously detects that the first air pressure is higher than the second preset pressure value, the control system 5 controls the cold dry gas providing device 3 to turn off.

[0168] Further, in order to facilitate sampling, in a possible embodiment, please refer to Figure 7 The biological sample storage system 100 further includes a sampling door panel 6. The sampling door panel 6 is disposed on the housing 1 and covers the sampling door panel 6 when the thermal insulation door 2 is closed. The sampling door panel 6 includes a plate body 61 and a transfer device 62 disposed on the plate body 61. The transfer device 62 has an open state and a closed state. In the open state, the transfer device 62 connects the sampling channel on one side of the plate body 61 with the sampling channel on the other side of the plate body 61; in the closed state, the space on both sides of the plate body 61 is separated by the sampling door panel 6. Figure 8 , control methods include:

[0169] S3. After the air pressure inside the storage chamber 11 is greater than the air pressure outside the storage chamber 11, the sampling device takes out the sample through the sampling channel of the transfer device.

[0170] During sampling, when the user opens the door or intends to open it, sensing module 4 senses a trigger signal and sends a first signal to control system 5. Upon receiving the first signal, control system 5 activates cold and dry gas supply device 3, delivering cold and dry gas into storage chamber 11. This ensures that, after thermal insulation door 2 is opened, the air pressure inside storage chamber 11 is greater than the air pressure outside. The sampling device then penetrates storage chamber 11 through the open transfer device 62 for sampling. This prevents air from entering storage chamber 11 through the open transfer device 62, thereby improving the environmental stability of storage chamber 11.

[0171] Furthermore, the present application does not limit how the sampling device removes the sample through the sampling channel of the transfer device 62. In one possible embodiment, the transfer device 62 includes at least one layer of elastic diaphragm, and each layer of the diaphragm includes multiple elastic parts arranged along the circumference. When the elastic part is resisted, the elastic part deforms to open the transfer device 62; when the elastic part is reset, the transfer device 62 is closed. Please continue to refer to Figure 8 The sampling device takes out the sample through the sampling channel of the transfer device 62, including:

[0172] S31, the sampling device passes through the gaps between the multiple diaphragms to deform the diaphragms to form sampling channels, the sampling device takes out the sample and separates it from the diaphragms, and the diaphragms are reset.

[0173] For example, the elastic portion can be configured in a fan shape, i.e., an arc-shaped piece. It is easy to understand that the elastic portion is also elastic and can undergo elastic deformation. Elastic portions of the same layer can be arranged along the circumference to form a circle. Seams exist between the elastic portions. When the elastic portions are not subjected to external forces, the edges of adjacent elastic portions contact each other, and the size of the seams between the elastic portions is nearly zero, so that the spaces on both sides of the diaphragm are connected without the diaphragm. At this time, the transfer device 62 is in a closed state, and the spaces on both sides of the plate are separated at the location of the transfer device 62.

[0174] In other embodiments, the diaphragm may be rectangular or other polygonal, and the elastic portion may be triangular, rectangular, or other shapes. In embodiments where the diaphragm is other polygonal, the diaphragm is preferably a regular polygon with 5 to 10 sides.

[0175] When the sampling device presses against the elastic portion, it deforms, separating the edges of adjacent elastic portions, thereby opening the transfer device 62. After the sampling device completes sampling, the force applied to the elastic portion by the sampling device disappears, and the elastic portion in the diaphragm returns to its original position due to its own elasticity, and the transfer device 62 automatically closes.

[0176] In some embodiments, the elastic part can be a silicone material structure, a silicone rubber material structure, or a rubber material structure, such as natural rubber, butadiene rubber, styrene-butadiene rubber, hexamethylene propylene rubber, etc. Technicians in this field can select according to the actual application scenario.

[0177] Of course, in other embodiments, the transfer device 62 may also include two or more layers of membranes. In this case, the seams between the elastic portions of two adjacent layers of membranes are staggered to further reduce the amount of external gas that enters the storage chamber 11 during the sampling process. In other embodiments, the seams between the elastic portions of two adjacent layers of membranes may not be staggered.

[0178] Furthermore, the present application does not limit the specific type of the thermal insulation door 2. In some possible embodiments, the thermal insulation door 2 may be a double-layer vacuum glass door.

[0179] In some possible embodiments, to facilitate the taking and placing of biological samples, please refer to Figure 9 The interior of the housing 1 further includes an operating room 12, which is optionally connected to the storage room 11, and the heat preservation door 2 is arranged in the operating room 12. The control method further includes:

[0180] S4. When the sensing module 4 senses the trigger signal, it sends a second signal to the control system 5. The control system 5 controls the cold and dry gas providing device 3 to deliver gas to the operating room 12 according to the received second signal, so that the air pressure inside the storage room 11 is greater than the air pressure inside the operating room 12, and the air pressure inside the operating room 12 is greater than the external atmospheric pressure; wherein the trigger signal is a signal detected when the user opens the door or intends to open the door.

[0181] During sampling, when the user opens the door or intends to open the door, the sensing module 4 senses a trigger signal and sends a first signal and a second signal to the control system 5. The control system 5 receives the second signal and controls the cold and dry gas supply device 3 to open, supplying cold and dry gas to the operating chamber 12, so that the air pressure in the operating chamber 12 is greater than the external atmospheric pressure. Simultaneously, the control system 5 receives the first signal and controls the cold and dry gas supply device 3 to open, supplying cold and dry gas to the storage chamber 11, so that the air pressure inside the storage chamber 11 is greater than the air pressure inside the operating chamber 12. Therefore, after the thermal insulation door 2 is opened, when the sampling device extends from the operating chamber 12 through the sampling channel into the storage chamber 11 for sampling, since the air pressure inside the operating chamber 12 is greater than the external atmospheric pressure, external air will basically not flow into the operating chamber 12. Furthermore, since the air pressure in the storage chamber 11 is greater than the air pressure in the operating chamber 12, the gas inside the operating chamber 12 will not flow into the storage chamber 11, thereby improving the environmental stability of the storage chamber 11 during the sampling operation.

[0182] Furthermore, in order to facilitate controlling the air pressure of the storage chamber 11 to be greater than the air pressure of the operating chamber 12 and to improve the stability of the air pressure inside the operating chamber 12, in some possible embodiments, a third gas pressure sensor may be provided in the operating chamber 12, and the third gas pressure sensor is connected to the control system 5. Figure 8 , controlling the cold dry gas supply device 3 to open and deliver gas to the operating chamber 12, so that the air pressure inside the storage chamber 11 is greater than the air pressure inside the operating chamber 12, and the air pressure inside the operating chamber 12 is greater than the external atmospheric pressure, including:

[0183] S41. The third gas pressure sensor monitors the third air pressure in the operating room 12 and sends the third air pressure to the control system 5. When the control system 5 detects that the third air pressure is lower than the fifth preset pressure value, the control system 5 controls the cold and dry gas providing device to deliver gas to the operating room 12; when the control system 5 detects that the third air pressure is higher than the sixth preset pressure value, the control system controls the cold and dry gas providing device 3 to stop delivering gas to the operating room 12; 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 of the storage chamber 11.

[0184] The sensing module 4 senses the trigger signal and sends the second signal and the first signal to the control system 5. At the same time, the control system 5 receives the first air pressure. When it determines that the first air pressure is lower than the first preset value, the control system 5 controls the cold and dry gas supply device 3 to start supplying cold and dry gas to the storage chamber 11. The first gas pressure sensor continuously supplies the first air pressure to the control system 5. When the control system 5 determines that the first air pressure is higher than the second preset pressure value, the cold and dry gas supply device is turned off to supply cold and dry gas to the storage chamber 11. At the same time, the control system 5 receives the third air pressure. When it determines that the third air pressure is lower than the fifth preset value, the control system 5 controls the cold and dry gas supply device 3 to start supplying cold and dry gas to the operating chamber 12. The third gas pressure sensor continuously supplies the third air pressure to the control system 5. When the control system 5 determines that the third air pressure is higher than the sixth preset pressure value, the cold and dry gas supply device 3 is turned off to stop supplying cold and dry gas to the operating chamber 12.

[0185] Furthermore, the present application does not limit how the cold and dry gas providing device 3 delivers or stops delivering cold and dry gas to the storage chamber 11 and the operating chamber 12 respectively. In a possible embodiment, the cold and dry gas providing device 3 has two air outlet channels, which are respectively connected to the storage chamber 11 and the operating chamber 12, and a solenoid valve is provided at each air outlet channel, and each solenoid valve is connected to the control system 5 signal so that the control system 5 can use the corresponding signal to individually control the switch of each solenoid valve.

[0186] Furthermore, in order to facilitate sampling, in a possible embodiment, the operating room 12 and the storage room 11 can be separated by an automatic door 7. A manipulator 8 is provided in the operating room 12, and both the manipulator 8 and the automatic door 7 are connected to the control system 5 by signal. Figure 8 , the control method further includes:

[0187] S5. The control system 5 controls the automatic door 7 to open, and then the manipulator 8 extends from the opened automatic door 7 into the storage chamber 11 to take samples, and transfers them to the operating chamber 12, and then extends from the operating chamber 12, and the user takes samples on the extended manipulator 8.

[0188] The biological sample storage system 100 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 5 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 automatic opening of the door. When the door body moves to a predetermined position, the control system 5 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 5 will control the motor to run in reverse to automatically close the door body.

[0189] For further information, please refer to Figure 8 , the control method provided by the example of this application also includes:

[0190] S6. The sensing module 4 senses that the trigger signal disappears and sends a third signal to the control system 5. The control system 5 controls the cold dry gas providing device 3 to be turned off according to the received third signal.

[0191] The present application does not limit how the sensing module 4 sends the third signal to the control system when it senses that the trigger signal disappears. In some possible embodiments, the door opening detection device 41 in the sensing module 4 sends the third signal to the control system 5 when it senses that the trigger signal disappears. The control system 5 receives the third signal and controls the cold dry gas providing device 3 to shut down.

[0192] Exemplarily, the door opening detection device 41 in the sensing module 4 includes a travel switch, which sends a first signal to the control system 5 when sensing that the contact position is separated from the door frame. The travel switch sends a third signal to the control system 5 when sensing that the contact position is in contact with the door frame.

[0193] For example, the first signal is a power-off signal, and the third signal is a power-on signal. Before the thermal insulation door 2 is opened, the electrical signal of the travel switch is in a power-on signal, and the control system 5 receives the power-on signal of the travel switch and controls the cold and dry gas providing device 3 to be turned off. When the travel switch senses that the contact position is separated from the door frame, the electrical signal state of the travel switch changes from a power-on state to a power-off state, and a power-off signal is sent to the control system 5 to control the cold and dry gas providing device 3 to be turned on. When the sampling is completed, the user closes the thermal insulation door. At this time, the travel switch senses that the door frame is in contact with the contact position again, and the electrical signal state of the travel switch changes from a power-off state to a power-on state again, and a power-on signal is sent to the control system 5, and the control system turns off the cold and dry gas providing device 3.

[0194] Exemplarily, the door opening detection device 41 in the sensing module 4 includes a magnetic sensor and a magnet, which are mounted at the contact position and the door frame, respectively. When the thermal door 2 is closed, a preset distance exists between the magnetic sensor and the magnet. The magnetic sensor senses a magnetic field of a first intensity and transmits a third signal to the control system 5. When the thermal door 2 is opened, the distance between the magnetic sensor and the magnet changes position. At this time, the intensity of the magnetic field sensed by the magnetic sensor is greater than or less than the first intensity, and the first signal is transmitted to the control system 5. When sampling is completed and the thermal door 2 is closed, the distance between the magnetic sensor and the magnet returns to the preset distance. The magnetic sensor again senses the magnetic field of the first intensity and transmits the third signal to the control system 5, causing the control system 5 to shut down the cold dry gas supply device. Alternatively, in some possible embodiments, the pre-door opening detection device 43 in the sensing module 4 can be configured as a push-button switch. When the user first contacts the door opening position and pulls open the thermal door 2, the push-button switch is turned on and remains in a self-locking state. During the sampling process after the user pulls open the thermal door 2, the control system 5 continues to receive the first signal, and the cold dry gas supply device 3 remains on. After the user completes sampling, they touch the door opening position a second time to close the thermal insulation door 2. The key switch is disconnected, the button automatically pops out, and a third signal is sent to the control system 5, which controls the cold and dry gas supply device 3 to turn off. If the user does not touch the key switch when closing the thermal insulation door 2, and the cold and dry gas supply device 3 is not turned off, the user can press the key switch again to turn off the cold and dry gas supply device 3.

[0195] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A control method for a biological sample storage system, characterized in that: The biological sample storage system includes a heat preservation door, a housing, a cold and dry gas supply device, a sensing module, and a control system. The heat preservation door is openably mounted on the housing. The housing includes a storage chamber. The control system is signal-connected to the cold and dry gas supply device and the sensing module. The control method includes: when the sensing module senses a trigger signal, the sensing module sends a first signal to the control system, and the control system controls the cold and dry gas supply device to turn on according to the received first signal, and supplies gas into the storage chamber so that the air pressure inside the storage chamber is greater than the air pressure outside the storage chamber; wherein the trigger signal is a signal detected when the user opens the door or intends to open the door.

2. The control method according to claim 1, characterized in that: The sensing module includes a door opening detection device, the housing has a door frame for contacting the thermal insulation door, the thermal insulation door has a contact position for contacting the door frame when closed, and the door opening detection device is arranged at the contact position and / or the door frame; When the sensing module senses the trigger signal, the sensing module sends a first signal to the control system, including: When the thermal insulation door is opened, the door opening detection device senses a trigger signal and sends the first signal to the control system.

3. The control method according to claim 2, characterized in that: The door opening detection device includes a travel switch; When the thermal insulation door is opened, the door opening detection device senses a trigger signal, including: When the heat-insulating door is opened, the travel switch senses that it is in a disengaged state.

4. The control method according to claim 2, characterized in that: The door opening detection device includes a magnetic sensor and a magnet; the magnet is arranged at one of the contact position or the door frame, and the magnetic sensor is arranged at the other of the contact position or the door frame; When the thermal insulation door is opened, the door opening detection device senses a trigger signal, including: When the heat-insulating door is opened, the relative position between the magnetic sensor and the magnet changes, and the magnetic sensor senses the change in the magnetic field.

5. The control method according to claim 2, characterized in that: The door opening detection device includes a pressure sensor, and the pressure sensor is arranged at the contact position or the door frame; When the thermal insulation door is opened, the door opening detection device senses a trigger signal, including: When the thermal insulation door is opened, the pressure sensor senses a pressure change between the contact position and the door frame.

6. The control method according to claim 1, characterized in that: The sensing module includes a human body detection device, and the human body detection device is arranged on the thermal insulation door; When the sensing module senses the trigger signal, the sensing module sends a first signal to the control system, including: When a user stands in front of the thermal insulation door, the human body detection device monitors the user information, senses the trigger signal, and sends the first signal to the control system.

7. The control method according to claim 6, characterized in that: The human body detection device includes an infrared sensor; When a user stands in front of the thermal insulation door, the human body detection device monitors the user information and senses a trigger signal, including: When a user stands in front of the thermal insulation door, the infrared rays emitted by the infrared sensor are blocked or reflected by the user, and the user information is monitored, thereby sensing the trigger signal.

8. The control method according to claim 6, characterized in that: The human body detection device includes a microwave radar sensor; When a user stands in front of the thermal insulation door, the human body detection device monitors the user information and senses a trigger signal, including: When a user stands in front of the thermal insulation door, the microwave radar sensor uses microwaves to emit multiple signal waves to the user. When the signal waves are bounced back, user information is monitored and the trigger signal is sensed.

9. The control method according to claim 6, characterized in that: The human body detection device includes a camera and a processor, the camera is connected to the processor by signal, and the processor is connected to the control system by signal; When a user stands in front of the thermal insulation door, the human body detection device monitors the user information and senses a trigger signal, including: When a user stands in front of the thermal insulation door, the user is photographed by the camera and photographing information is obtained. The photographing information is sent to the processor, and the processor receives the photographing information to obtain the trigger signal.

10. The control method according to claim 1, characterized in that: The sensing module includes a pre-door opening detection device, the thermal insulation door has an open door position, and the pre-door opening detection device is arranged at the open door position; When the sensing module senses the trigger signal, the sensing module sends a first signal to the control system, including: Before opening the thermal insulation door, the user first touches the pre-door opening detection device, and the pre-door opening detection device senses the trigger signal and sends the first signal to the control system.

11. The control method according to claim 10, characterized in that: The pre-door opening detection device includes a key switch; Before opening the thermal insulation door, the user first touches the pre-door opening detection device, and the pre-door opening detection device senses a trigger signal, including: Before opening the thermal insulation door, the user first presses the key switch, and the key switch senses a trigger signal.

12. The control method according to claim 10, characterized in that: The pre-door opening detection device includes a touch-sensitive sensor; Before opening the thermal insulation door, the user first touches the pre-door opening detection device, and the pre-door opening detection device senses a trigger signal, including: Before opening the thermal insulation door, the user first touches the touch sensing sensor, and the touch sensing sensor senses a trigger signal.

13. The control method according to any one of claims 1 to 12, characterized in that: Also includes: A first gas pressure sensor is provided in the storage chamber, and the first gas pressure sensor is connected to the control system signal; Controlling the cold dry gas supply device to start and deliver gas into the storage chamber so that the air pressure inside the storage chamber is greater than the air pressure outside the storage chamber includes: The first gas pressure sensor monitors the first air pressure in the storage chamber and sends the first air pressure to the control system. When the control system detects that the first air pressure is lower than a first preset pressure value, the control system controls the cold and dry gas providing device to turn on; when the control system detects that the first air pressure is higher than a second preset pressure value, the control system controls the cold and dry gas providing device to turn off; wherein, the second preset pressure value is higher than the first preset pressure value, and the first preset pressure value is not lower than atmospheric pressure.

14. The control method according to claim 13, characterized in that: The cold dry gas supply device is connected to the storage chamber through an air outlet channel, and a solenoid valve is provided on the air outlet channel, and the solenoid valve is connected to the control system signal; The control system controls the cold and dry gas supply device to start according to the received first signal and delivers gas into the storage chamber, including: The control system controls the solenoid valve to open according to the received first signal, so as to deliver the cold and dry air from the air outlet channel into the storage chamber.

15. The control method according to claim 14, characterized in that: The cold dry gas providing device includes a cold dryer and a gas storage tank, the cold dryer and the gas storage tank are connected through an air inlet channel, the gas storage tank is provided with the air outlet channel, and the cold dryer is connected to the control system signal; The control method includes: the control system controls the cold dryer to generate cold dry gas, and transmits the cold dry gas to the gas storage tank through the air inlet channel.

16. The control method according to claim 15, characterized in that: A second gas pressure sensor is provided in the gas storage tank, and the second gas pressure sensor is connected to the control system signal; The control system controls the cold dryer to generate cold dry gas, and transports the cold dry gas to the gas storage tank through the air inlet channel, including: The second gas pressure sensor monitors the second air pressure in the gas storage tank and sends the second air pressure to the control system. When the control system detects that the second air pressure is lower than a third preset pressure value, the control system controls the cold dryer to operate; when the control system detects that the second air pressure is higher than a fourth preset pressure value, the control system controls the cold dryer to shut down; 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.

17. The control method according to any one of claims 1 to 12, characterized in that: It also includes a sampling door plate; the sampling door plate is arranged on the housing, and the thermal insulation door covers the sampling door plate when the thermal insulation door is closed; the sampling door plate includes a plate body and a transfer device arranged on the plate body, the transfer device has an open state and a closed state; the transfer device connects the sampling channel on one side of the plate body with the sampling channel on the other side of the plate body in the open state; When the transfer device is in the closed state, the spaces on both sides of the plate body are separated by the sampling door plate; The control method includes: after the air pressure inside the storage chamber is greater than the air pressure outside the storage chamber, a sampling device takes out a sample through the sampling channel of the transfer device.

18. The control method according to claim 17, wherein: The transmission device includes at least one layer of elastic diaphragm, each layer of the diaphragm includes a plurality of elastic parts arranged along the circumference, and when the elastic parts are abutted, the elastic parts are deformed to put the transmission device in an open state; when the elastic parts are reset, the transmission device is in a closed state; The sampling device takes out a sample through the sampling channel of the transfer device, comprising: The sampling device passes through the gaps between the plurality of diaphragms to deform the diaphragms to form sampling channels. The sampling device takes out the sample and separates from the diaphragms, and the diaphragms are reset.

19. The control method according to any one of claims 1 to 12 and 18, characterized in that: The interior of the housing further includes an operating room, the operating room and the storage room are selectively connected, and the heat preservation door is arranged in the operating room; The control method also includes: when the sensing module senses the trigger signal, it sends a second signal to the control system, and the control system controls the cold and dry gas supply device to deliver gas to the operating chamber according to the received second signal, so that the air pressure inside the storage chamber is greater than the air pressure inside the operating chamber, and the air pressure inside the operating chamber is greater than the external atmospheric pressure; wherein, the trigger signal is a signal detected when the user opens the door or intends to open the door.

20. The control method according to claim 19, characterized in that: A third gas pressure sensor is provided in the operating room, and the third gas pressure sensor is connected to the control system signal; Controlling the cold dry gas supply device to start and deliver gas into the operating chamber so that the air pressure inside the storage chamber is greater than the air pressure inside the operating chamber, and the air pressure inside the operating chamber is greater than the external atmospheric pressure, including: The third gas pressure sensor monitors the third air pressure in the operating chamber and sends the third air pressure to the control system. When the control system detects that the third air pressure is lower than the fifth preset pressure value, the control system controls the cold and dry gas supply device to deliver gas into the operating chamber; when the control system detects that the third air pressure is higher than the sixth preset pressure value, the control system controls the cold and dry gas supply device to stop delivering gas into the operating chamber; 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 of the storage chamber.

21. The control method according to claim 19, characterized in that: The operating room is separated from the storage room by an automatic door. A manipulator is provided in the operating room. Both the manipulator and the automatic door are connected to the control system signal. The control method also includes: the control system controls the automatic door to open, and then the robot extends from the opened automatic door into the storage room to take samples, and transfers to the operation room, and then extends from the operation room, and the user takes samples on the extended robot.

22. The control method according to any one of claims 1 to 12, characterized in that: Also includes: The sensing module senses that the trigger signal disappears and sends a third signal to the control system. The control system controls the cold and dry gas providing device to be turned off according to the received third signal.

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