Cold storage equipment

Abstract

The utility model relates to the technical field of electrical equipment, and discloses cold storage equipment which is provided with a refrigeration chamber, the cold storage equipment comprises a pressure reminding device, a pressure switch module and a reminding module, the pressure switch module is installed on the cold storage equipment and electrically connected with the reminding module, and the reminding module is electrically connected with the pressure switch module. The pressure switch module is used for detecting the air pressure in the refrigeration chamber, and the reminding module gives out a reminding instruction according to the pressure detected by the pressure switch module. The pressure switch module and the reminding module are arranged, the pressure switch module detects the air pressure in the refrigeration chamber, when the detected air pressure value is smaller than the preset pressure threshold value, the pressure switch module is closed, a circuit of the reminding module is switched on, a reminding signal is sent out, and at the moment, a user knows that negative pressure exists in the cold storage equipment; when the pressure switch module detects that the air pressure value is larger than or equal to the preset pressure threshold value, the reminding module stops sending out the reminding signal, the user can normally open the door body at the moment, use is convenient for the user, and user experience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrical equipment, especially to a cold storage equipment. BACKGROUND

[0002] This section provides only background information related to the present disclosure, which is not necessarily prior art.

[0003] The cold storage equipment such as refrigerator can be used for refrigerating or freezing various articles, and with the rapid development of biological and medical industries, the long-term storage of biological materials such as biological and medical samples and reagents requires more and more low-temperature refrigerators. Such low-temperature refrigerators generally require a storage temperature below-40℃ and a stable refrigeration system to achieve long-term and reliable storage of biological materials.

[0004] During the use of the low-temperature refrigerator by the user, a large negative pressure will occur after the refrigerator door is closed after taking the articles due to the low temperature of the refrigerator. If the user uses the refrigerator again when the air pressure in the refrigerator is not balanced, the door cannot be opened. At this time, the user needs to try to open the door multiple times until the air pressure in the refrigerator is balanced with the air pressure outside to open the door again, which is not good for the user experience. SUMMARY

[0005] The utility model discloses a cold storage equipment, the cold storage equipment has the refrigeration room, the cold storage equipment includes pressure reminding device, the pressure reminding device includes pressure switch module and reminding module, the pressure switch module is installed on the cold storage equipment, the pressure switch module is electrically connected with the reminding module, the pressure switch module is used for detecting the air pressure in the refrigeration room, the reminding module sends the reminding instruction according to the pressure detected by the pressure switch module.

[0006] The utility model discloses a cold storage equipment, the cold storage equipment has the refrigeration room, the cold storage equipment includes pressure reminding device, the pressure reminding device includes pressure switch module and reminding module, the pressure switch module is installed on the cold storage equipment, the pressure switch module is electrically connected with the reminding module, the pressure switch module is used for detecting the air pressure in the refrigeration room, the reminding module sends the reminding instruction according to the pressure detected by the pressure switch module.

[0007] The pressure reminding device of the utility model sets up pressure switch module and reminding module on the cold storage equipment, the pressure switch module detects the air pressure in the refrigeration room, when detecting that the air pressure value is less than the preset pressure threshold, the pressure switch module will close, thereby the circuit of the reminding module is turned on, the reminding module sends the reminding signal, at this time, the user can know that there is negative pressure in the cold storage equipment, and the door body cannot be opened, when the pressure switch module detects that the air pressure value in the cold storage equipment is greater than or equal to the preset pressure threshold, the pressure switch module is disconnected, and the reminding module stops sending the reminding signal, at this time, the user can know that the negative pressure in the cold storage equipment disappears, so that the door body can be normally opened for use, which is convenient for the user to use and improves the user experience.

[0008] In addition, the pressure reminding device has the following additional technical features.

[0009] In some embodiments of the present application, the pressure switch module is connected in series in the control circuit of the reminding module.

[0010] In some embodiments of the present application, the cold storage device comprises a box body and a door body, the door body is rotatably installed on the box body and is used to open and close the refrigeration chamber, and the pressure switch module is arranged on the box body or the door body.

[0011] In some embodiments of the present application, the pressure switch module comprises a pressure relay, and the pressure relay is a normally closed pressure relay.

[0012] In some embodiments of the present application, the pressure switch module further comprises a connecting pipe, the connecting pipe is arranged on the box body and is in communication with the refrigeration chamber, and the pressure relay is arranged on the connecting pipe.

[0013] In some embodiments of the present application, the reminding module comprises a light reminding module, the light reminding module is arranged on the box body or the door body and is used to give light reminding.

[0014] In some embodiments of the present application, the light reminding module comprises a mounting plate and a plurality of lamp beads, the mounting plate is mounted on the box body, and the plurality of lamp beads are arranged on the mounting plate at intervals.

[0015] In some embodiments of the present application, the reminding module comprises a sound reminding module, the sound reminding module is arranged on the box body or the door body and is used to give sound reminding.

[0016] In some embodiments of the present application, the reminding module comprises a motion reminding module, the motion reminding module is arranged on the box body or the door body and is used to give motion reminding.

[0017] In some embodiments of the present application, the pressure reminding device further comprises a power module, the power module is used to supply power to the pressure switch module and the reminding module. BRIEF DESCRIPTION OF DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the present application. Moreover, the same reference numerals in the drawings indicate the same or similar elements. In the drawings:

[0019] Fig. 1A structural schematic view of the cold storage device according to the embodiment of the present application is shown schematically.

[0020] Fig. 2 A circuit schematic view of the pressure reminding device of the cold storage device according to the embodiment of the present application is shown schematically.

[0021] Fig. 3 A control block diagram of the pressure reminding device of the cold storage device according to the embodiment of the present application is shown schematically.

[0022] Fig. 4 A structural schematic view of the light reminding module of the pressure reminding device of the cold storage device according to the embodiment of the present application is shown schematically.

[0023] Reference signs are as follows:

[0024] 100, cold storage device;

[0025] 1, pressure switch module; 11, pressure relay; 12, connecting pipe;

[0026] 2, reminding module; 21, light reminding module; 211, mounting plate; 212, lamp bead;

[0027] 3, box body; 31, refrigeration compartment;

[0028] 4, door body;

[0029] 5, power module. DETAILED DESCRIPTION

[0030] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0031] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0032] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0033] Spatially relative terms, such as "inner", "outer", "inward", "outward", "lower", "bottom", "top", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Such spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0034] The temperature range of the low-temperature refrigerator compartment is usually-40℃ to-86℃. When storing items, such as putting items into the refrigerator or taking items out of the refrigerator, the door of the refrigerator needs to be opened. After the door of the refrigerator is opened, the space in the refrigerator is connected with the external environment, and the internal cold air exchanges with the external hot air. The internal cold air (with large density) flows out quickly, and the external hot air (with small density) enters the refrigerator. Because the temperature of the low-temperature refrigerator is extremely low, the temperature difference between the inside and outside is extremely large, and the air exchange speed is much higher than that of a common refrigerator. Moreover, after the refrigerator is closed, the space in the whole refrigerator body forms a sealed environment. The exchanged air is cooled and shrinks in volume, and the air pressure in the refrigerator body forms a significant negative pressure, which causes the refrigerator door to be pressed by the atmospheric pressure and cannot be opened in a short time.

[0035] During the use of the low-temperature refrigerator by the user, if the user uses the refrigerator again when the air pressure in the refrigerator is not balanced, the door cannot be opened. Because it is unknown when the air pressure in the refrigerator can be balanced, the user needs to wait beside the refrigerator and continuously try to pull open the refrigerator door until the air pressure in the refrigerator is balanced with the air pressure outside to open the door again, which causes inconvenience to the user and poor user experience.

[0036] However, the low-temperature refrigerator in the related art usually lacks an effective pressure reminding device, and cannot timely feed back the change of the internal pressure to the user, thereby causing inconvenience to the user.

[0037] Therefore, the cold storage equipment provided in the embodiments aims to set a pressure switch module 1 and a reminding module 2. When the air pressure value detected by the pressure switch module 1 is less than a preset pressure threshold, the reminding module 2 sends a reminding signal, so that the user knows that there is a negative pressure in the cold storage equipment 100. When the air pressure value is greater than or equal to the preset pressure threshold, the pressure switch module 1 is disconnected, and the reminding module 2 stops sending the reminding signal, so that the user can open the door 4 and improve the user experience, thereby solving the above technical problems.

[0038] As shown in Figs. 1 to 4 According to the embodiments of the utility model, a cold storage equipment 100 is provided, which can be a low-temperature refrigerator, a refrigerator, or the like. In the embodiments, the cold storage equipment 100 is a low-temperature refrigerator. The cold storage equipment 100 includes a body 3, a door 4, and a pressure reminding device.

[0039] The body 3 is internally provided with a refrigeration compartment 31 having a first opening. The door 4 is hingedly arranged at the first opening of the body 3 to open or close the refrigeration compartment 31. The refrigeration compartment 31 is internally provided with multiple layers of storage compartments separated from each other. Each layer of the storage compartments has a second opening. A storage compartment door is hingedly arranged at each second opening to open or close the corresponding layer of the storage compartments. Each storage compartment can serve as an independent storage space for storing items.

[0040] The pressure reminding device comprises a pressure switch module 1 and a reminding module 2, the pressure switch module 1 is installed on a box body 3 or a door body 4, and the specific position can be selected according to actual design requirements. The pressure switch module 1 is in communication with a refrigeration chamber 31, the pressure switch module 1 is electrically connected with the reminding module 2, the pressure switch module 1 is provided with a clear pressure threshold value, the pressure switch module 1 detects the air pressure in the refrigeration chamber 31, and when it is detected that the air pressure in the refrigeration chamber 31 is lower than the pressure threshold value, it indicates that there is a negative pressure state in the refrigeration chamber 31. In the case that there is a negative pressure in the refrigeration chamber 31, the reminding module 2 sends a reminding signal, and at this time, the user can clearly know that there is a negative pressure in the cold storage equipment.

[0041] The cold storage equipment of the utility model sets up pressure switch module 1 and reminding module 2 on cold storage equipment 100, and pressure switch module 1 detects the air pressure in cold storage equipment 100, when detecting that the air pressure value is less than the preset pressure threshold value, pressure switch module 1 will close, thereby making the circuit of reminding module 2 conduct, and making reminding module 2 send a reminding signal, at this time, the user can know that there is a negative pressure in cold storage equipment 100, and the door body 4 cannot be opened, when pressure switch module 1 detects that the air pressure value in cold storage equipment 100 is greater than or equal to the preset pressure threshold value, pressure switch module 1 is disconnected, and reminding module 2 stops sending a reminding signal, at this time, the user can know that the negative pressure in cold storage equipment 100 disappears, and the pressure recovery time is usually about 3-5 minutes, the user can normally open the door body 4 and use, facilitating the user, providing the user with more intelligent and convenient use experience, and improving the user experience.

[0042] In some embodiments of the utility model, pressure switch module 1 is connected in series in the control circuit of reminding module 2. In this circuit configuration, the complexity and the number of elements of the circuit can be reduced, so that the pressure signal can directly trigger reminding module 2 without complex signal processing or intermediate links.

[0043] In addition, the power supply or control signal of reminding module 2 needs to pass through pressure switch module 1, only when the contact of pressure switch module 1 is closed, the current can pass through, and reminding module 2 can work. Through the combination of pressure switch module 1 and reminding module 2, automatic state monitoring and reminding functions are realized, manual intervention is reduced, and the circuit structure is simple, easy to realize and maintain.

[0044] In some embodiments of the utility model, pressure switch module 1 comprises a pressure relay 11, and the pressure relay 11 is a normally closed pressure relay. In the normal working state, the contact of the normally closed pressure relay is in the closed state, when the detected pressure is lower than or higher than the set value, the contact is disconnected, thereby triggering reminding module 2.

[0045] The normally closed pressure relay keeps closed state under normal circumstances, reduces mechanical wear and electrical contact problems caused by frequent operation, improves the overall reliability of the system, and reduces the risk of failure of the prompting function caused by the failure of the pressure relay 11. In addition, the prompting module 2 is only activated when negative pressure is detected in the refrigeration chamber 31. This on-demand triggering design greatly reduces the energy consumption of the system, especially for cold storage equipment that needs to run for a long time, which helps to reduce the operating cost of the equipment.

[0046] Specifically, the pressure relay 11 includes a pressure sensor, a mechanical transmission mechanism and an electrical switch, wherein the pressure sensor includes an elastic element and a pressure interface, the mechanical transmission mechanism includes a top rod and an adjusting piece, and the electrical switch includes a micro switch / contact and an insulating shell. When working, the measured gas in the refrigeration chamber 31 enters the pressure cavity through the interface, the gas pressure pushes the elastic element to deform, the slight deformation of the elastic element is amplified through the lever mechanism to drive the top rod to move, when the pressure is less than the preset pressure threshold, the top rod moves against the spring resistance, the top rod pushes the micro switch to change the contact state, and the circuit of the prompting module 2 is controlled to be turned on; when it is detected that the pressure value is greater than or equal to the preset pressure threshold, the spring force is adjusted to make the top rod reset, and the micro switch returns to the initial state to reset the contact.

[0047] The selection of the pressure relay 11 needs to be based on the actual working pressure range and accuracy requirements of the equipment, and the embodiment is not limited.

[0048] In some embodiments, the pressure switch module 1 can also be provided as a circuit of a pressure sensor and a relay, or can also be provided in the form of a pressure switch. The working principle of the above devices is described in the related art, which is not repeated here.

[0049] In some embodiments of the utility model, the pressure switch module 1 further includes a connecting pipe 12, which is arranged on the box body 3 and communicates with the refrigeration chamber 31, and the pressure relay 11 is arranged in communication on the connecting pipe 12.

[0050] Specifically, the side wall of the box body 3 is provided with a mounting hole, and the connecting pipe 12 is arranged in the mounting hole to be mounted on the side wall of the box body 3, and the pressure relay 11 communicates with the refrigeration chamber 31 through the connecting pipe 12. The material of the connecting pipe 12 should have good pressure resistance and corrosion resistance, for example, high borosilicate glass pipe, copper pipe or stainless steel pipe, etc. The connecting pipe 12 is fixed on the box body 3 by a sealing element (such as a rubber sealing ring) and communicates with the refrigeration chamber 31. The sealing element should be made of low-temperature and aging-resistant material to ensure the sealing between the connecting pipe 12 and the box body 3, and prevent the leakage of cold air in the refrigeration chamber 31. The inner diameter and length of the connecting pipe 12 should be designed according to the wall thickness of the box body 3, the flow rate and pressure loss requirements of the refrigeration system, to ensure the accurate transmission of the pressure signal and improve the accuracy of pressure detection.

[0051] After installation, the pressure relay 11 needs to be calibrated and debugged. The calibration process includes adjusting the pressure setting value of the pressure relay 11 to the pressure range of normal operation of the equipment. During debugging, the sensitivity and accuracy of the contact action of the pressure relay 11 can be checked by simulating different pressure conditions. If it is found that the contact action is not sensitive or there is a false action, the sensitivity of the pressure relay 11 needs to be adjusted or the pressure relay 11 needs to be replaced.

[0052] In some embodiments, to avoid the influence of pressure fluctuations in the connecting pipe 12 on the measurement results, a buffer device such as a small air bag or a spring buffer can be provided on the connecting pipe 12. The buffer device can absorb part of the pressure fluctuations, so that the pressure relay 11 can stably detect the actual pressure.

[0053] In some embodiments of the utility model, the reminding module 2 includes a light reminding module 21, which is arranged on the box body 3 or the door body 4 and is used to emit light reminders.

[0054] Specifically, in the embodiment, the light reminding module 21 is installed on the side wall of the box body 3, and the position is eye-catching and easy to observe, so as to facilitate the user to observe. The light reminding module 21 includes a mounting plate 211 and a plurality of lamp beads 212, and the mounting plate 211 is installed on the box body 3 along the height direction of the box body 3. The mounting plate 211 can be made of plastic or metal material and has good insulation and mechanical strength.

[0055] The plurality of lamp beads 212 are arranged on the mounting plate 211 along the length direction of the mounting plate 211, and the lamp beads 212 can be LED lamp beads 212, which have the characteristics of low power consumption, high brightness and long service life. In addition, the number and spacing of the lamp beads 212 can be designed according to the actual reminding requirements.

[0056] When the pressure relay 11 detects that the air pressure value is less than the preset pressure threshold value during use, the pressure relay 11 contact is closed, the circuit of the light reminding module 21 is triggered, the lamp beads 212 are lit, and the user is reminded that there is a large negative pressure in the box body 3 and the door body 4 cannot be opened.

[0057] In some embodiments, a light sensor can be integrated on the mounting plate 211 to automatically adjust the brightness of the LED lamp beads 212 according to the surrounding light intensity, thereby improving the applicability of the light reminding module 21.

[0058] In some embodiments of the utility model, the reminding module 2 includes a sound reminding module, which is arranged on the box body 3 or the door body 4 and is used to emit sound reminders.

[0059] Specifically, the sound reminding module is installed on the cabinet 3 or the door body 4, and the position needs to ensure that the sound can be clearly spread. For example, in the refrigeration equipment, the sound reminding module can be installed on the top or side of the cabinet 3, reminding the user that the internal pressure of the equipment is abnormal through sound. The sound reminding module can adopt a buzzer or a loudspeaker, wherein the buzzer is small in size and low in power consumption, and is suitable for small equipment; the loudspeaker can emit clearer sound reminders, and is suitable for large equipment or occasions requiring a longer reminding distance. The volume of the sound reminding module can be adjusted according to the actual use environment, for example, in a quiet laboratory environment, the volume can be set to be moderate; in a noisy industrial environment, the volume can be appropriately increased.

[0060] When the pressure relay 11 detects that the air pressure value is less than the preset pressure threshold value, the contact thereof is closed, triggering the circuit of the sound reminding module 2, so that the buzzer or the loudspeaker emits a sound reminder. The frequency and volume of the sound reminder can be adjusted according to actual needs, for example, the sound reminder can be set to be emitted once per second, and the volume is large enough to attract the attention of the user.

[0061] In some embodiments of the utility model, the reminding module 2 comprises a motion reminding module, which is arranged on the cabinet 3 or the door body 4 and is used for emitting a motion reminder.

[0062] The motion reminding module can be a mechanical device, which reminds the user through a specific motion (such as vibration or popping out) when the pressure switch module detects that there is negative pressure in the cabinet. Specifically, the motion reminding module can adopt a vibrator or a mechanical indicating device. The vibrator reminds the user through vibration, and is suitable for occasions requiring reminding in a noisy environment; the mechanical indicating device can directly display the pressure abnormality condition through mechanical motion, for example, a rotating fan blade or the like.

[0063] The motion reminding module is installed on the cabinet 3 or the door body 4, and the position needs to ensure that the user can perceive the motion reminder. For example, in the refrigeration equipment, the vibrator can be installed at the handle of the door body 4, so that the user can feel the vibration reminder when opening the door body 4 when the pressure is abnormal; the mechanical indicating device can be installed on the side or front of the cabinet 3, so that the user can clearly see the reminder.

[0064] By setting the motion reminding module, it can be particularly suitable for scenes requiring use in a noisy environment or scenes in which the user's hearing is limited, reminding the user that there is negative pressure in the refrigeration chamber 31 through vibration or mechanical motion, thereby improving the applicability of the pressure reminding device.

[0065] The light reminding module 21, the sound reminding module and the motion reminding module can be independently or combinedly used, realizing multi-dimensional warning and ensuring that the user can perceive the warning in different environments (such as a noisy environment).

[0066] In some embodiments of the utility model, the cold storage device further comprises a power module 5, the power module 5 is used for power supply for the pressure switch module 1 and the reminding module 2, and the power module 5 can be powered by battery or external power supply.

[0067] The power module 5 is connected with the pressure switch module 1 and the reminding module 2 through wires, and provides stable power supply for the pressure relay 11 and the light reminding module 21.When the pressure relay 11 detects that the air pressure value is less than the preset pressure threshold, the pressure switch module 1 will be closed, thereby turning on the light reminding module 21, and the power module 5 will provide sufficient power for the light reminding module 21, so that it can normally send a reminder signal.

[0068] The power module 5 is installed inside or outside the box body 3, and the position needs to ensure that the power supply line is reasonably and safely arranged. For example, in the refrigeration equipment, the power module 5 can be installed at the bottom or side of the box body 3, and connected with the pressure switch module 1 and the reminding module 2 through wires. The connection of the power module 5 with the pressure switch module 1 and the reminding module 2 needs to ensure the reliability and safety of the electrical connection, and the connection line needs to use appropriate wire diameter and insulation material to avoid short circuit or leakage of the line. At the same time, a fuse or overcurrent protection device can be arranged in the connection line to protect the power module 5 and the reminding module 2 from overcurrent damage.

[0069] In some embodiments, in order to ensure the stable operation of the power module 5, protection and monitoring measures need to be implemented. For example, overvoltage protection, undervoltage protection and overcurrent protection circuits can be arranged in the power module 5, and when the power voltage is too high, too low or the current is too large, the protection circuit can cut off the power supply in time to protect the safety of the equipment.

[0070] In addition, a monitoring circuit can be arranged in the power module 5 to monitor the voltage, current and temperature parameters of the power supply in real time. The monitoring circuit can display the state information of the power supply through an indicator light or a display screen, so that the user can know the operation of the power module 5 in time.

[0071] The above is only the preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A cold storage device, characterized by, The cold storage device has a refrigeration compartment, and comprises a pressure reminding device, which comprises a pressure switch module and a reminding module.

2. The cold storage device according to claim 1, characterized by The pressure switch module is installed on the cold storage device and is electrically connected to the reminding module.

3. The cold storage device according to claim 1, characterized by The pressure switch module is used to detect the air pressure in the refrigeration compartment.

4. The cold storage device according to claim 3, characterized by The pressure switch module is in series with the control circuit of the reminding module.

5. The cold storage device according to claim 4, characterized by The cold storage device comprises a cabinet and a door body.

6. The cold storage device according to claim 3, characterized by The door body is rotatably installed on the cabinet and is used to open and close the refrigeration compartment.

7. The cold storage device according to claim 6, characterized by The pressure switch module is arranged on the cabinet or the door body.

8. The cold storage device according to claim 3, characterized by The pressure switch module comprises a pressure relay.

9. The cold storage device according to claim 3, characterized by The pressure relay is a normally closed pressure relay.

10. The cold storage device according to any one of claims 1 to 9, characterized by, The pressure switch module further comprises a connecting pipe. The connecting pipe is arranged on the cabinet and is in communication with the refrigeration compartment. The pressure relay is arranged on the connecting pipe. The reminding module comprises a light reminding module. The light reminding module is arranged on the cabinet or the door body and is used to emit light reminding. The light reminding module comprises a mounting plate and a plurality of lamp beads. The mounting plate is installed on the cabinet. The plurality of lamp beads are arranged on the mounting plate at intervals. The reminding module comprises a sound reminding module. The sound reminding module is arranged on the cabinet or the door body and is used to emit sound reminding. The reminding module comprises a motion reminding module. The motion reminding module is arranged on the cabinet or the door body and is used to make motion reminding. The pressure reminding device further comprises a power module. The power module is used to supply electrical signals to the pressure switch module and the reminding module.

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