Cold storage door closing alarm system

Abstract

The utility model discloses a refrigeration house door closing alarm system, which comprises a wall body, a roller shutter door, a first driving unit, a fan assembly, a first sensor group, a first reflector group, a second sensor group, an alarm and a relay, and is characterized in that a fan blows air to one side, close to a refrigeration house, of the roller shutter door through a first air outlet to form a single-side air wall; the first sensors are arranged on the two sides of the roller shutter door respectively, when a person or an object passes through the first access, the relay controls the roller shutter door to be opened, the second sensor senses that the roller shutter door is opened, and the first timing module is started through the second switch to conduct timing. In the process, if a person enters the detection range of the first sensor, the first switch can reset timing of the first timing module so as to keep the opening state of the roller shutter door, a user does not need to manually reset the timer or scram the timer, and the roller shutter door is more suitable for actual use scenes and convenient to use.

Description

Technical Field

[0001] The utility model relates to the field of cold storage alarms, in particular to a cold storage door closing alarm system. Background Art

[0002] Cold storage is a type of refrigeration equipment that can store batches of food, liquids, chemicals, medicines, vaccines or scientific experiments at constant temperature and humidity. With the advancement of the times, cold storage is gradually developing towards intelligence. In actual applications, cold storage doors are often not closed in time, resulting in the loss of cold air in the cold storage. This not only causes the problem of increased energy consumption in the cold storage, but also affects the preservation of items. Usually, an alarm system is set near the cold storage door. If the cold storage door is not closed for a long time, the alarm system will sound an alarm to remind the staff to close the cold storage door in time.

[0003] The "Cold Storage Door Structure with Timeout Alarm Closure" with a publication number of CN217785587U provides a method for staff to enter the cold storage through the entrance. At this time, the controller controls the timer to start timing. When the timing time exceeds 10-20 seconds, the controller controls the alarm device to sound an alarm prompt, and controls the movable door body to slide toward the travel switch in the door frame to close the entrance. When one side of the movable door body reaches the travel switch, the controller controls the movable door body to stop sliding. Compared with the traditional cold storage door structure, when the staff is far away from the cold storage door and cannot perceive the alarm prompt sound in time, the cold storage door can still be closed in time. Technical solution. However, in this process, when a long shelf stays at the cold storage door during transportation, the timer of the cold storage door starts timing when a human body or object is detected at the beginning. If you encounter a timeout problem, you need to use an emergency stop or manually clear the timer. Otherwise, the timer will still be closed or continue to alarm after the timeout, affecting the operation of the staff. Summary of the invention

[0004] In view of this, the purpose of the utility model is to provide a cold storage door closing alarm system.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the utility model is:

[0006] A cold storage door closing alarm system comprises a wall, a rolling shutter door, a first drive unit, a fan assembly, a first sensor group, a first reflective sheet group, a second sensor group, an alarm and a relay. A first passage is arranged on the wall, the first passage has a first side surface, a second side surface, a first top surface and a first bottom surface, the first side surface and the second side surface are arranged opposite to each other, the first top surface is arranged above the first side surface and the second side surface, the first bottom surface is arranged below the first side surface and the second side surface, and a cold storage is arranged on the inner side of the wall; the rolling shutter door is arranged on the first passage; the first drive unit is arranged on the first top surface, and the output end of the first drive unit is transmission-connected with the rolling shutter door; the fan assembly It includes a fan and a first air outlet, the first air outlet is arranged on the first top surface, and the first air outlet is in a long strip shape, the first air outlet is arranged on the side of the rolling shutter door close to the cold storage, the first air outlet is parallel to the rolling shutter door, the air outlet end of the fan is connected to the first air outlet, and the air inlet end of the fan is arranged toward the cold storage; the first sensor group includes two first sensors, the two first sensors are respectively arranged on both sides of the rolling shutter door, and the first sensor is used to detect an object or a human body in the first passage; the first reflector group includes two first reflectors, one first reflector and one first sensor are arranged on the first passage opposite to each other, and the first reflector is used to reflect the sensor signal of the first sensor;

[0007] The second sensor group includes at least one second sensor, which is arranged on the first bottom surface and in the projection area of ​​the rolling door in the vertical direction, and the second sensor is used to detect the opening and closing state of the rolling door; the alarm is arranged on the first passage; the relay is arranged on the wall, and the relay is electrically connected to the fan, the alarm, the first drive unit, the first sensor group, and the second sensor group. The relay includes a first timing module, a first switch, a second switch and a third switch. The first timing module is electrically connected to the first switch and the second switch, the second switch is electrically connected to the second sensor, the first switch is electrically connected to the first sensor, the first timing module is used to time the opening time of the rolling door, the second switch is used to start the first timing module, the first switch is used to clear the first timing module, and the third switch is electrically connected to the fan.

[0008] In some embodiments, the alarm is an audible and visual alarm or a flashing light alarm; the first sensor is an infrared sensor; and the second sensor is one of a travel switch, a magnetic induction switch or a pressure sensor.

[0009] In some embodiments, the number of the second sensors is two, one second sensor is disposed close to the first side surface, and the other second sensor is disposed close to the second side surface.

[0010] In some embodiments, a third sensor group is also included, the third sensor group includes at least one third sensor, the third sensor is arranged on the moving path of the rolling door, and the third sensor is at a first preset height from the first bottom surface, the third sensor is one of a travel switch or a magnetic induction switch, and the third sensor is electrically connected to the relay.

[0011] In some embodiments, a first long groove is provided on the first side, and the first long groove extends in a vertical direction; a second long groove is provided on the second side, and the second long groove extends in a vertical direction; the first long groove and the second long groove are arranged opposite to each other, and the rolling door has a first side and a second side; the system also includes a first sliding rail, a first slider, a second sliding rail and a second slider, the first sliding rail is laid in the first long groove, a first notch is provided on the first sliding rail, and the first notch is arranged toward the second side, and a third sensor is arranged in the first notch; the first slider is arranged on the first side of the rolling door, and the first slider is sleeved on the first sliding rail; the second sliding rail is laid in the second long groove, a second notch is provided on the second sliding rail, and the second notch is arranged toward the second side, and a third sensor is arranged in the second notch; the second slider is arranged on the second side of the rolling door, and the second slider is sleeved on the second sliding rail.

[0012] In some embodiments, it also includes a communication module and a terminal. The communication module is electrically connected to the relay, and the communication module is one of a NB-loT communication module, a Bluetooth communication module, and a WIFI module; the terminal establishes a communication connection with the communication module, and the terminal is one of a mobile phone, a computer, a tablet, and a screen display.

[0013] In some embodiments, a temperature sensor is further included. The temperature sensor is arranged on the first side and close to the first bottom surface. The detection end of the temperature sensor faces the side where the cold storage is located. The temperature sensor is used to detect the temperature of the first passage close to the cold storage.

[0014] By adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0015] The cold storage door closing alarm system includes a wall, a rolling shutter door, a first drive unit, a fan assembly, a first sensor group, a first reflective sheet group, a second sensor group, an alarm and a relay. The fan blows air to the side of the rolling shutter door close to the cold storage through the first air outlet to form a single-side wind wall to isolate the air flow inside and outside the rolling shutter door, reduce the probability of the inflow of external normal temperature air caused by the opening of the rolling shutter door, and also reduce the probability of the outflow of low-temperature gas in the cold storage caused by the opening of the rolling shutter door. The first sensors are respectively arranged on both sides of the rolling shutter door, and one first sensor corresponds to one first reflective sheet. When a person or object passes through the first passage, the relay controls the rolling shutter door to open, the second sensor senses the opening of the rolling shutter door, and starts the first timing module through the second switch to start timing. During this process, if someone else enters the detection range of the first sensor, the first switch will reset the timing of the first timing module to keep the rolling shutter door open, without the need for the user to manually reset the timer or emergency stop operation, which is more suitable for actual usage scenarios and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is the first schematic diagram of the cold storage door closing alarm system;

[0018] Figure 2 yes Figure 1 Top view of the .

[0019] Reference numerals:

[0020] 1. Wall;

[0021] 11. First side;

[0022] 12. Second side;

[0023] 13. First top surface;

[0024] 14. a first bottom surface;

[0025] 2. Rolling shutter door;

[0026] 3. Fan assembly;

[0027] 31. Fan;

[0028] 32. First air outlet;

[0029] 4. The first sensor;

[0030] 5. The first reflective sheet;

[0031] 6. Second sensor;

[0032] 7. Relay;

[0033] 8. Alarm;

[0034] 9. The third sensor. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is particularly noted that the following embodiments are only used to illustrate the present invention, but do not limit the scope of the present invention. Similarly, the following embodiments are only partial embodiments of the present invention rather than all embodiments. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1 to Figure 2 The present embodiment provides a cold storage door closing alarm system, including a wall 1, a rolling door 2, a first driving unit, a fan 31 assembly 3, a first sensor 4 group, a first reflective sheet 5 group, a second sensor 6 group, an alarm 8 and a relay 7. A first passage is provided on the wall 1, and the first passage has a first side surface 11, a second side surface 12, a first top surface 13 and a first bottom surface 14. The first side surface 11 and the second side surface 12 are arranged opposite to each other, the first top surface 13 is arranged above the first side surface 11 and the second side surface 12, and the first bottom surface 14 is arranged below the first side surface 11 and the second side surface 12. A cold storage is provided on the inner side of the wall 1; the rolling door 2 is arranged on the first passage; the first driving unit is arranged on the first top surface 13, and the output end of the first driving unit is transmission-connected to the rolling door 2 ; The fan 31 assembly 3 includes a fan 31 and a first air outlet 32, the first air outlet 32 ​​is arranged on the first top surface 13, and the first air outlet 32 ​​is in a long strip shape, the first air outlet 32 ​​is arranged on the side of the rolling door 2 close to the cold storage, the first air outlet 32 ​​is parallel to the rolling door 2, the air outlet end of the fan 31 is connected to the first air outlet 32, and the air inlet end of the fan 31 is arranged toward the cold storage; the first sensor 4 group includes two first sensors 4, the two first sensors 4 are respectively arranged on both sides of the rolling door 2, and the first sensor 4 is used to detect objects or human bodies in the first passage; the first reflector 5 group includes two first reflectors 5, one first reflector 5 and one first sensor 4 are arranged on the first passage opposite to each other, and the first reflector 5 is used to reflect the sensor signal of the first sensor 4;

[0037] The second sensor 6 group includes at least one second sensor 6, which is arranged on the first bottom surface 14 and in the projection area of ​​the rolling door 2 in the vertical direction. The second sensor 6 is used to detect the opening and closing state of the rolling door 2; the alarm 8 is arranged on the first passage; the relay 7 is arranged on the wall 1, and the relay 7 is electrically connected to the fan 31, the alarm 8, the first drive unit, the first sensor 4 group, and the second sensor 6 group. The relay 7 includes a first timing module, a first switch, a second switch and a third switch. The first timing module is electrically connected to the first switch and the second switch, the second switch is electrically connected to the second sensor 6, the first switch is electrically connected to the first sensor 4, the first timing module is used to time the opening time of the rolling door 2, the second switch is used to start the first timing module, the first switch is used to clear the first timing module, and the third switch is electrically connected to the fan 31.

[0038] In some embodiments, the alarm 8 is an audible and visual alarm 8 or a flashing light alarm 8; the first sensor 4 is an infrared sensor; and the second sensor 6 is a travel switch, a magnetic induction switch or a pressure sensor.

[0039] In this embodiment, the wall 1 can be understood as the wall where the cold storage is located. In some embodiments, the thickness of the wall 1 is relatively large. For the convenience of distinction, the area where the rolling door 2 is arranged on the wall 1 is recorded as the first passage, the two sides of the first passage are recorded as the first side surface 11 and the second side surface 12, the top of the first passage is recorded as the first top surface 13, and the bottom of the first passage is recorded as the first bottom surface 14.

[0040] A rolling door 2 is provided on the first passage, and optionally, the rolling door 2 can be centrally arranged in the first passage. The first driving unit can be a servo motor, which is arranged on the first top surface 13 and is transmission-connected with the rolling door 2 to drive the rolling door 2 to rotate, thereby realizing the opening and closing operations of the rolling door 2.

[0041] Furthermore, a fan 31 assembly 3 is provided on the inner side of the rolling door 2. It should be noted that the side where the cold storage is located is recorded as the inner side. The fan 31 assembly 3 includes a fan 31 and a first air outlet 32. The fan 31 can be a centrifugal fan 31 or a double centrifugal fan 31. The first air outlet 32 ​​is a long strip structure, such as Figure 2 As shown, the first air outlet 32 ​​is arranged on the inner side of the rolling door 2. When the rolling door 2 is opened, the fan 31 is started synchronously to form an air flow and spray it out on the inner side of the rolling door 2 through the first air outlet 32 ​​to form a high-speed flowing air wall, thereby reducing the probability of external air flowing into the cold storage and reducing the energy consumption of the cold storage.

[0042] In this embodiment, the first sensor 4 group includes two first sensors 4. Optionally, the first sensor 4 is an infrared photoelectric sensor. The first sensor 4 group is used in conjunction with the first reflective sheet 5 group. The first sensor 4 transmits an infrared signal to the first reflective sheet 5. The first reflective sheet 5 reflects the infrared signal and is received by the first sensor 4. When a person or an object passes through the first passage, the infrared signal of the first sensor 4 is blocked, and the first sensor 4 cannot receive the reflected infrared signal in time, that is, a first sensing signal is formed. The first driving unit is activated according to the first sensing signal of the first sensor 4 to guide the rolling door 2 to open.

[0043] The second sensor 6 is a pressure sensor or a travel switch. The second sensor 6 is arranged on the first bottom surface 14 and is used to detect the opening state of the rolling door 2. When the rolling door 2 is opened, taking the pressure sensor as an example, the pressure on the second sensor 6 changes, and a second sensor signal is generated. After receiving the second sensor signal, the second switch starts the timing of the first timing module. The timing time is also the opening time of the rolling door 2. When the first timing module times out, it means that the current opening time of the rolling door 2 is too long. The relay 7 will also generate an opening signal to control the alarm 8 to turn on, so as to remind the staff to close the rolling door 2 in time.

[0044] After the rolling door 2 is opened, if the object is in a state of continuously passing through the first passage, the first sensor 4 will repeatedly sense the occlusion information of the object, and the generated first sensing signal will also cause the first switch to clear the current timing information of the first timing module and restart the timing, thereby avoiding the problem that the sensing signal of the first sensor 4 has no effect on the timing state of the first timing module, so that the first timing module cannot update the timing state in time.

[0045] This embodiment sets a first switch, a second switch and a first timing module. To address the problem that the timing cannot be continuously refreshed during the peak period of continuous shipments from the cold storage, the first sensor 4 is used to timely monitor the movement of the cold storage door, and the first switch is used to implement the zeroing operation of the first timing module, so that the closing alarm system of the rolling door 2 is more adapted to the actual door opening needs on site and is easy to operate.

[0046] In some embodiments, there are two second sensors 6, one second sensor 6 is disposed near the first side 11, and the other second sensor 6 is disposed near the second side 12. This method can timely sense the opening state of both sides of the rolling door 2, avoiding the problem of false sensing caused by damage to one of the second sensors 6.

[0047] See also Figure 1, in some embodiments, a third sensor 9 group is further included, the third sensor 9 group includes at least one third sensor 9, the third sensor 9 is arranged on the moving path of the rolling door 2, and the third sensor 9 is at a first preset height from the first bottom surface 14, the third sensor 9 is one of a travel switch or a magnetic induction switch, and the third sensor 9 is electrically connected to the relay 7. In this embodiment, the third sensor 9 is arranged on the moving path of the rolling door 2, and the first preset height can be 2000cm-2300cm, preferably 2200cm. It should be noted that the function of the third sensor 9 is the same as that of the second sensor 6, which is used to detect whether the rolling door 2 is open. The first preset height set by the third sensor 9 can be understood as whether the rolling door 2 is fully opened, so as to meet actual needs and realize accurate monitoring of the state of the rolling door 2.

[0048] In some embodiments, a first long groove is provided on the first side 11, and the first long groove extends in the vertical direction; a second long groove is provided on the second side 12, and the second long groove extends in the vertical direction, the first long groove and the second long groove are arranged opposite to each other, and the rolling door 2 has a first side and a second side; the system also includes a first sliding rail, a first slider, a second sliding rail and a second slider, the first sliding rail is laid in the first long groove, the first sliding rail is provided with a first notch that passes through the first sliding rail, and the first notch is arranged toward the second side 12, and a third sensor 9 is arranged in the first notch; the first slider is arranged on the first side of the rolling door 2, and the first slider is sleeved on the first sliding rail; the second sliding rail is laid in the second long groove, the second sliding rail is provided with a second notch that passes through the second sliding rail, and the second notch is arranged toward the second side 12, and a third sensor 9 is arranged in the second notch; the second slider is arranged on the second side of the rolling door 2, and the second slider is sleeved on the second sliding rail.

[0049] This embodiment shows the specific connection method between the rolling door 2 and the first passage. The arrangement of the first guide rail, the first slider and the second guide rail, the second slider facilitates smoother movement of the rolling door 2 up and down. At the same time, third sensors 9 are arranged in the first gap and the second gap, which can sense whether both ends of the rolling door 2 are fully opened, and accurately monitor the opening state of the rolling door 2.

[0050] In some embodiments, a communication module and a terminal are also included. The communication module is electrically connected to the relay 7, and the communication module is one of a NB-loT communication module, a Bluetooth communication module, and a WIFI module; the terminal establishes a communication connection with the communication module, and the terminal is one of a mobile phone, a computer, a tablet, and a screen display.

[0051] NB-IoT communication module is a low-power, wide-coverage remote communication technology that can achieve long-distance wireless communication; NB-IoT communication module can be connected to the Internet through cellular networks (such as 2G, 3G, 4G), enabling devices to remotely transmit data and receive instructions. Bluetooth communication module is a short-range wireless communication technology suitable for near-field communication; Bluetooth communication module can be used for data transmission and communication between mobile phones, computers, tablets and other devices. WIFI module is a wireless LAN communication technology that enables devices to connect to the Internet or local area network wirelessly to achieve high-speed data transmission and communication. WIFI module is often used to connect computers, mobile phones, tablets and other devices to wireless networks.

[0052] Users can choose the most suitable communication method according to actual conditions. For example, the NB-IoT communication module is suitable for low-power, wide-coverage long-distance communication; the Bluetooth communication module is suitable for short-distance communication; and the WIFI module is suitable for high-speed communication within a local area network. Different communication methods can meet the needs of different users. By adding communication modules and terminals, users can establish a communication connection with the cold storage door closing alarm system through terminal devices such as mobile phones, computers, tablets or screen displays, and can remotely monitor the status of the cold storage, including the status and temperature of the rolling door 2, and can remotely control the opening and closing operation of the rolling door 2.

[0053] In some embodiments, a temperature sensor is further included. The temperature sensor is arranged on the first side surface 11 and close to the first bottom surface 14. The detection end of the temperature sensor faces the side where the cold storage is located. The temperature sensor is used to detect the temperature of the first passage close to the cold storage.

[0054] The temperature sensor is a device used to measure the ambient temperature. It detects the temperature by sensing the temperature change and converting it into an electrical signal. By monitoring the temperature of the first passage close to the cold storage, temperature anomalies such as too high or too low can be detected in time. This serves as a reference for the length of time the rolling door 2 is open. When the rolling door 2 is opened for too long, the temperature of the cold storage will change too much. The setting of the temperature sensor can facilitate users to detect the abnormal opening of the rolling door 2 in time.

[0055] The cold storage door closing alarm system includes a wall 1, a rolling door 2, a first driving unit, a fan 31 assembly 3, a first sensor 4 group, a first reflective sheet 5 group, a second sensor 6 group, an alarm 8 and a relay 7. The fan 31 blows air to the side of the rolling door 2 close to the cold storage through the first air outlet 32 ​​to form a single-sided wind wall to isolate the air flow inside and outside the rolling door 2, thereby reducing the probability of the inflow of external normal temperature air due to the opening of the rolling door 2, and also reducing the probability of the outflow of low-temperature gas in the cold storage due to the opening of the rolling door 2. The first sensors 4 are respectively arranged on both sides of the rolling door 2, and one first sensor 4 corresponds to a first reflective sheet 5. When a person or an object passes through the first passage, the relay 7 controls the rolling door 2 to open, and the second sensor 6 senses that the rolling door 2 is opened, and starts the first timing module for timing through the second switch. During this process, if someone else enters the detection range of the first sensor 4, the first switch will reset the timing of the first timing module to keep the rolling door 2 in the open state. There is no need for the user to manually reset the timer or perform an emergency stop operation, which is more suitable for actual usage scenarios and easy to use.

[0056] The above descriptions are only some embodiments of the present invention, and do not limit the protection scope of the present invention. Any equivalent device or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cold storage door closing alarm system, characterized in that: include: A wall, wherein a first passage is provided on the wall, wherein the first passage has a first side surface, a second side surface, a first top surface, and a first bottom surface, wherein the first side surface is arranged opposite to the second side surface, the first top surface is arranged above the first side surface and the second side surface, the first bottom surface is arranged below the first side surface and the second side surface, and a cold storage is arranged on the inner side of the wall; A rolling door, arranged on the first passage; A first driving unit, arranged on the first top surface, wherein an output end of the first driving unit is drivingly connected to the rolling door; A fan assembly, comprising a fan and a first air outlet, wherein the first air outlet is arranged on the first top surface and is in an elongated strip shape, and the first air outlet is arranged on a side of the rolling door close to the cold storage, the first air outlet is parallel to the rolling door, the air outlet end of the fan is connected to the first air outlet, and the air inlet end of the fan is arranged toward the cold storage; A first sensor group, comprising two first sensors, the two first sensors are respectively arranged on both sides of the rolling door, and the first sensors are used to detect objects or human bodies in the first passage; A first reflective sheet group, comprising two first reflective sheets, one of the first reflective sheets and one of the first sensors being arranged on the first passage opposite to each other, the first reflective sheet being used for reflecting a sensing signal of the first sensor; a second sensor group, comprising at least one second sensor, wherein the second sensor is arranged on the first bottom surface and within a projection area of ​​the rolling door in a vertical direction, and the second sensor is used to detect an opening or closing state of the rolling door; an alarm, arranged on the first passage; A relay is arranged on the wall, the relay is electrically connected to the fan, the alarm, the first drive unit, the first sensor group, and the second sensor group. The relay includes a first timing module, a first switch, a second switch and a third switch. The first timing module is electrically connected to the first switch and the second switch, the second switch is electrically connected to the second sensor, the first switch is electrically connected to the first sensor, the first timing module is used to time the opening time of the rolling door, the second switch is used to start the first timing module, the first switch is used to clear the first timing module, and the third switch is electrically connected to the fan.

2. The cold storage door closing alarm system according to claim 1 is characterized in that: The alarm is an audible and visual alarm or a flashing light alarm; The first sensor is an infrared sensor; The second sensor is one of a travel switch, a magnetic induction switch or a pressure sensor.

3. The cold storage door closing alarm system according to claim 1 is characterized in that: The number of the second sensors is two, one of the second sensors is disposed close to the first side surface, and the other of the second sensors is disposed close to the second side surface.

4. The cold storage door closing alarm system according to claim 1 is characterized in that: Also includes: The third sensor group includes at least one third sensor, wherein the third sensor is arranged on the moving path of the rolling door, and the third sensor is at a first preset height from the first bottom surface. The third sensor is one of a travel switch or a magnetic induction switch, and the third sensor is electrically connected to the relay.

5. The cold storage door closing alarm system according to claim 4 is characterized in that: The first side surface is provided with a first long groove, the first long groove extends in a vertical direction, the second side surface is provided with a second long groove, the second long groove extends in a vertical direction, the first long groove and the second long groove are arranged opposite to each other, and the rolling door has a first side edge and a second side edge; The system further comprises: a first slide rail, laid in the first long groove, the first slide rail being provided with a first notch penetrating the first slide rail, the first notch being arranged toward the second side surface, the third sensor being arranged in the first notch; A first sliding block is arranged on a first side of the rolling door, and the first sliding block is sleeved on the first sliding rail; a second slide rail, laid in the second long groove, the second slide rail being provided with a second notch penetrating the second slide rail, the second notch being arranged toward the second side surface, the third sensor being arranged in the second notch; The second sliding block is arranged on the second side of the rolling door, and the second sliding block is sleeved on the second sliding rail.

6. The cold storage door closing alarm system according to claim 1 is characterized in that: Also includes: A communication module, electrically connected to the relay, wherein the communication module is one of a NB-loT communication module, a Bluetooth communication module, and a WIFI module; The terminal establishes a communication connection with the communication module, and the terminal is one of a mobile phone, a computer, a tablet and a screen display.

7. The cold storage door closing alarm system according to claim 1 is characterized in that: Also includes: A temperature sensor is arranged on the first side surface and close to the first bottom surface, with the detection end of the temperature sensor facing the side where the cold storage is located, and the temperature sensor is used to detect the temperature of the first passage close to the cold storage.

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