Quick-response low-temperature fire sprinkler applied to cold chain

Abstract

The invention discloses a quick-response low-temperature fire sprinkler applied to a cold chain, comprising: a temperature sensing module for detecting heat change generated by a fire source in an extremely low temperature environment; the instant spraying execution unit is connected with the temperature sensing module and used for starting fire extinguishing agent spraying according to the heat change; the environment monitoring subsystem is integrated in the fire sprinkler and continuously monitors the temperature and humidity fluctuation in the refrigeration house; and the fault early warning module is coupled with the environment monitoring subsystem and is used for identifying an abnormal condition according to the temperature and humidity fluctuation. The fire sprinkler provided by the invention not only can quickly detect a fire source and start a fire extinguishing program in an extremely low temperature environment, but also integrates an environment monitoring function, can effectively control the fire behavior on the premise of not influencing refrigerated goods, monitors the environment change in a refrigeration house in real time, and timely finds and warns a potential fault condition; therefore, the cold chain fire safety level is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of cold chain, and in particular relates to a fast-response low-temperature fire-fighting sprinkler applied to cold chain. Background Art

[0002] In the cold chain logistics and warehousing industry, ensuring the safety of refrigerated goods is of vital importance. Existing cold chain fire protection systems usually use traditional fire detection methods, such as smoke detectors or high temperature sensors, which may fail or react slowly in extremely low temperature environments. In addition, existing fire extinguishing systems often cannot work effectively under low temperature conditions, resulting in difficulty in extinguishing the fire in time once it occurs, causing significant losses.

[0003] Although existing low-temperature fire sprinklers can cope with fires in low-temperature environments to a certain extent, they often have the following problems: First, the response speed is slow and they cannot be quickly activated in the early stages of a fire; second, there is a lack of real-time monitoring of ambient temperature and humidity, and they cannot provide early warning of potential failure risks; third, the selection of fire extinguishing agents and the spraying method are not optimized, which may result in poor fire extinguishing effects or damage to goods. Summary of the invention

[0004] The purpose of the present invention is to provide a fast-response low-temperature fire sprinkler for use in the cold chain, which can quickly detect the source of fire and start the fire extinguishing procedure in an extremely low temperature environment. At the same time, it can also monitor the environmental changes in the cold storage in real time and issue a cold storage fault alarm to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention adopts the following technical solution: a fast-response low-temperature fire sprinkler applied to cold chain, comprising:

[0006] A temperature sensing module, used to detect the heat changes generated by the fire source in an extremely low temperature environment; an instant spraying execution unit, connected to the temperature sensing module, used to start the spraying of the fire extinguishing agent according to the heat changes; a fire extinguishing agent storage device, connected to the instant spraying execution unit, to provide fire extinguishing medium; an environmental monitoring subsystem, integrated inside the fire sprinkler, continuously monitoring the temperature and humidity fluctuations in the cold storage; a fault warning module, coupled with the environmental monitoring subsystem, to identify abnormal conditions based on the temperature and humidity fluctuations.

[0007] Preferably, the temperature sensing module comprises:

[0008] Thermistor, used to detect the heat change generated by the fire source and generate an electrical signal S proportional to the heat change, where S=k*ΔT, k is a proportionality coefficient, and k>0;

[0009] A signal processing circuit, connected to the thermistor, for receiving the electrical signal S and amplifying it to obtain an amplified signal S′;

[0010] A signal comparison unit, connected to the signal processing circuit, is configured to compare the amplified signal S′ with a preset threshold Sth. When S′≥Sth, a fire alarm signal F is triggered. Sth is a preset activation threshold, and Sth>0.

[0011] Preferably, the immediate spraying execution unit includes:

[0012] A signal receiver, configured to receive the fire alarm signal F;

[0013] A controller, connected to the signal receiver, outputs a control signal C when receiving the fire alarm signal F;

[0014] An electromagnetic valve, connected to the controller, is configured to open or close according to the control signal C. When C≥Cth, the electromagnetic valve is opened. Cth is a preset control threshold, and Cth>0;

[0015] A spraying mechanism, connected to the electromagnetic valve, is activated when the electromagnetic valve is opened to spray a fire extinguishing medium.

[0016] Preferably, the fire extinguishing agent storage device includes:

[0017] A liquid storage tank, configured to store a fire extinguishing medium;

[0018] A pressure detector, configured to detect the pressure P in the liquid storage tank and output a signal P′ representing the current pressure;

[0019] A pressure regulator, connected to the pressure detector, automatically adjusts the pressure in the liquid storage tank when P′<Pmin or P′>Pmax, so that P′ returns to the range of Pmin≤P′≤Pmax. Pmin and Pmax are respectively preset minimum and maximum safety pressure values;

[0020] A spraying interface, connected to the liquid storage tank and the immediate spraying execution unit, releases the fire extinguishing medium through the spraying interface when the immediate spraying execution unit is activated.

[0021] Preferably, the environmental monitoring subsystem includes:

[0022] A temperature and humidity sensor, configured to continuously monitor the temperature T and humidity H in the cold storage and output a signal TH representing the current temperature and humidity;

[0023] A signal processor, connected to the temperature and humidity sensor, is configured to process the signal TH and calculate the temperature and humidity change amounts ΔT and ΔH;

[0024] An abnormality judgment unit, connected to the signal processor, is used to judge whether the calculated results ΔT and ΔH exceed preset thresholds Tth and Hth, and output an abnormality signal A when |ΔT|>Tth or |ΔH|>Hth;

[0025] The alarm controller is connected to the abnormality judgment unit, and triggers the alarm signal AL when receiving the abnormality signal A, wherein Tth and Hth are respectively preset temperature and humidity abnormality thresholds.

[0026] Preferably, the fault warning module includes:

[0027] A temperature and humidity signal receiver, used to receive the temperature and humidity signal TH of the environment monitoring subsystem;

[0028] A temperature and humidity variation calculation unit, connected to the temperature and humidity signal receiver, for calculating the temperature and humidity variation ΔT and ΔH;

[0029] An abnormality detector, connected to the temperature and humidity change calculation unit, for detecting whether ΔT and ΔH exceed preset thresholds Tth and Hth, and outputting an abnormality detection signal AD when ΔT>Tth or ΔH>Hth;

[0030] The warning signal generator is connected to the abnormality detector and is used to generate a warning signal W when receiving the abnormality detection signal AD, wherein W=1 indicates abnormality, W=0 indicates normality, and Tth and Hth are preset temperature and humidity abnormality thresholds.

[0031] Preferably, it also includes a communication interface, embedded in the fault warning module, for transmitting the abnormal condition information to a remote monitoring center, and the communication interface includes:

[0032] A signal encoder is used to encode the received warning signal W to generate a coded signal CW;

[0033] A transmission module, connected to the signal encoder, for sending the encoded signal CW to a remote monitoring center via a communication network;

[0034] A status confirmation unit, connected to the transmission module, for confirming that the coded signal CW is successfully sent, and if unsuccessful, resending the CW until success is confirmed;

[0035] A retry counter is connected to the state confirmation unit and is used to record the number of retries N. When N reaches a preset maximum number of retries Nmax, the retry is stopped, and Nmax>0.

[0036] Preferably, it also includes a nozzle housing for packaging the instant spray execution unit and other components, and the nozzle housing includes:

[0037] A main body shell, used to encapsulate the instant spray execution unit and other components;

[0038] A heat insulation layer, arranged on the inner wall of the main shell, to reduce the influence of external low temperature on internal components;

[0039] A temperature-maintaining layer is filled in the gap between the heat-insulating layer and the main shell to maintain the internal temperature within a predetermined range T_range, where T_range is a temperature range to ensure the normal operation of the component;

[0040] The temperature monitoring unit is arranged in the main body shell, and is used for real-time monitoring of the internal temperature T and ensuring that T is within T_range. When T is not within T_range, the temperature adjustment signal TS is triggered.

[0041] Preferably, it also includes a nozzle, which matches the nozzle housing and is used to optimize the fire extinguishing agent distribution pattern to cover a predetermined area, and the nozzle includes:

[0042] A nozzle, matched with the nozzle housing, for forming a spray pattern of a specific shape;

[0043] A spray angle adjustment device, in cooperation with the nozzle design, is used to adjust the spray angle θ to ensure that the fire extinguishing agent covers a predetermined area R, where R is a preset spray coverage area;

[0044] A spray distance control unit, connected to the spray angle adjustment device, for controlling the spray distance D to ensure that the best coverage effect is achieved at a predetermined distance D_target, where D_target is a preset optimal spray distance;

[0045] The nozzle flow control valve is connected to the injection distance control unit and is used to adjust the nozzle flow Q, wherein Q=k*D^2*θ, and k is the flow coefficient.

[0046] Preferably, it also includes an alarm trigger condition setting module, which is managed by the fault warning module and activates an alarm when the temperature and humidity are monitored to exceed a preset safety range. The alarm trigger condition setting module includes:

[0047] A threshold setting unit, used to set the preset safety ranges Tsafe and Hsafe of temperature and humidity;

[0048] A monitoring comparator, connected to the threshold setting unit, for comparing the monitored actual temperature and humidity values ​​T and H with preset safety ranges Tsafe and Hsafe;

[0049] An alarm trigger, connected to the monitoring comparator, outputs an alarm signal AL when T or H exceeds the preset safety ranges Tsafe or Hsafe. When T < Tmin or T > Tmax or H < Hmin or H > Hmax, AL = 1; otherwise, AL = 0, where Tmin, Tmax, Hmin, and Hmax are respectively the upper and lower limits of the preset safety temperature and humidity.

[0050] An alarm delay unit, connected to the alarm trigger, is used to wait for a preset delay time t_delay before outputting the alarm signal AL to filter out short-term temperature and humidity fluctuations. When the delay time t_delay ends, if AL is still 1, the alarm is finally activated.

[0051] The technical effects and advantages of the present invention: A fast-response low-temperature fire sprinkler applied to cold chain proposed by the present invention has the following advantages compared with the prior art:

[0052] The fire sprinkler proposed by the present invention can not only quickly detect a fire source and start the fire extinguishing procedure in an extremely low-temperature environment, but also integrates an environmental monitoring function, can effectively control the fire without affecting the refrigerated goods, and can monitor the environmental changes in the cold storage in real time, discover and warn potential fault situations in time, thereby improving the fire safety level of the cold chain. Brief Description of the Drawings

[0053] Figure 1 It is a module diagram of the fast-response low-temperature fire sprinkler applied to cold chain of the present invention. Detailed Embodiments

[0054] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0055] The present invention provides a fast-response low-temperature fire sprinkler applied to cold chain, as Figure 1 shown, the fast-response low-temperature fire sprinkler applied to cold chain proposed by the present invention includes: a temperature sensing module, an immediate spraying execution unit, a fire extinguishing agent storage device, an environmental monitoring subsystem, a fault warning module, a communication interface, a sprinkler housing, a nozzle, and an alarm trigger condition setting module.

[0056] Among them, the temperature sensing module is used to detect the heat changes generated by the fire source in an extremely low temperature environment; the instant spraying execution unit is connected to the temperature sensing module to start the spraying of the fire extinguishing agent according to the heat changes; the fire extinguishing agent storage device is connected to the instant spraying execution unit to provide fire extinguishing medium; the environmental monitoring subsystem is integrated into the fire sprinkler to continuously monitor the temperature and humidity fluctuations in the cold storage; the fault warning module is coupled with the environmental monitoring subsystem to identify abnormal conditions based on temperature and humidity fluctuations; the communication interface is embedded with the fault warning module to transmit abnormal condition information to the remote monitoring center; the nozzle housing is used to encapsulate the instant spraying execution unit and other components; the nozzle is matched with the nozzle housing to optimize the fire extinguishing agent distribution pattern to cover the predetermined area; the alarm trigger condition setting module is managed by the fault warning module, and the alarm is activated when the temperature and humidity are detected to exceed the preset safety range.

[0057] In this embodiment, the temperature sensing module uses a highly sensitive thermistor element, which can accurately capture the tiny heat changes generated by the fire source in an environment below -40°C and convert these changes into electrical signals.

[0058] In the instant spraying execution unit in this embodiment: when the temperature sensing module detects the heat change and generates a corresponding electrical signal, the instant spraying execution unit responds immediately, opens the fire extinguishing agent storage device through the solenoid valve, and starts the fire extinguishing agent spraying process.

[0059] In this embodiment, the fire extinguishing agent storage device has a built-in non-water-based fire extinguishing agent, which is suitable for low-temperature environments and can quickly cover the fire source to prevent the fire from spreading. The device is also equipped with a pressure sensor to ensure that the pressure of the fire extinguishing agent is stable when spraying.

[0060] In this embodiment, the environmental monitoring subsystem integrates temperature and humidity sensors to continuously monitor changes in environmental parameters in the cold storage and transmit the data to the fault warning module in real time.

[0061] In this embodiment, the fault warning module analyzes the data provided by the environmental monitoring subsystem, and when it detects that the temperature and humidity exceed the preset safety range, the alarm trigger condition setting module is activated, and the abnormal information is sent to the remote monitoring center through the communication interface.

[0062] In this embodiment, the communication interface supports multiple communication protocols to ensure effective communication with the remote monitoring center and timely transmit alarm information even in extreme situations.

[0063] In this embodiment, the nozzle housing is made of low-temperature resistant material to ensure that the structural stability and sealing performance can be maintained at extremely low temperatures, thereby protecting the internal components from the influence of the external environment.

[0064] In this embodiment, the nozzle is designed with a porous distribution structure to ensure that the fire extinguishing agent forms a uniform covering layer when spraying, covers the predetermined protection area, and improves the fire extinguishing efficiency.

[0065] In this embodiment, the alarm trigger condition setting module allows the user to customize the temperature and humidity thresholds according to actual conditions to ensure effective early warning under different types of refrigerated goods storage requirements.

[0066] The present invention realizes rapid response and effective control of fire sources in extremely low temperature environments by integrating functions such as temperature sensing, instant spraying, environmental monitoring, fault warning, and remote communication. The fire sprinkler can not only quickly detect the fire source and start the fire extinguishing procedure in an extremely low temperature environment, but also integrates the environmental monitoring function, which can effectively control the fire without affecting the refrigerated goods, and monitor the environmental changes in the cold storage in real time, and timely discover and warn potential faults, thereby improving the level of cold chain fire safety. The details are as follows:

[0067] Exemplarily, the temperature sensing module includes:

[0068] Thermistor, which uses a highly sensitive semiconductor thermistor, can respond quickly to temperature changes in extremely low temperature environments (such as -40°C). It is used to detect the heat change generated by the fire source and generate an electrical signal S proportional to the heat change, where S = k*ΔT, k is the proportionality coefficient, and k>0;

[0069] The signal processing circuit is connected to the thermistor and is used to receive the electrical signal S and amplify it to obtain an amplified signal S′; the amplification factor can be adjusted according to actual application requirements to ensure that the signal S′ can reliably trigger subsequent signal comparisons.

[0070] The signal comparison unit is connected to the signal processing circuit and is used to compare the amplified signal S′ with a preset threshold value Sth. When S′≥Sth, a fire alarm signal F is triggered, where Sth is a preset start threshold value and Sth>0.

[0071] For example:

[0072] In a cold chain logistics warehouse, the temperature sensing module is installed in the flammable goods storage area. At a certain moment, due to equipment failure or human factors, a fire suddenly appeared in the area and the temperature rose rapidly. At this time:

[0073] Thermistor detection: The thermistor detects that the temperature rises from the original -20℃ to -10℃, and the change ΔT=10.

[0074] Electrical signal generation: Assuming that the proportionality coefficient k=0.5, the electrical signal S=0.5×10=5V.

[0075] Signal amplification processing: The signal processing circuit amplifies the signal S. Assuming the amplification factor is 2, the amplified signal S′=2×5=10V.

[0076] Signal comparison: The preset starting threshold Sth=8V. Since S′=10V is greater than SthSth, the signal comparison unit triggers the fire alarm signal F.

[0077] Immediate response: The fire alarm signal F triggers the instant spraying execution unit to start spraying the fire extinguishing agent, quickly controlling the fire source and preventing the fire from spreading.

[0078] Through the above specific implementation, the temperature sensing module of the present invention can quickly detect the heat change generated by the fire source in an extremely low temperature environment and start the fire extinguishing program in time, and can detect the temperature change immediately at the early stage of the fire source and quickly start the fire extinguishing program. Through signal amplification processing and the setting of a preset start threshold, the reliable triggering of the fire alarm signal is ensured.

[0079] In summary, the temperature sensing module of the present invention exhibits excellent fire source detection capability and rapid response capability in extremely low temperature environments such as cold chain logistics warehouses, significantly improving the level of fire safety.

[0080] Exemplarily, the instant spraying execution unit includes:

[0081] The signal receiver is used to receive the fire alarm signal F; the signal receiver has high sensitivity to ensure that the fire alarm signal can be received accurately.

[0082] The controller is connected to the signal receiver and outputs a control signal C when receiving a fire alarm signal F. A logic circuit is provided inside the controller to ensure that the control signal C is output only when a valid fire alarm signal F is received.

[0083] The solenoid valve is connected to the controller and is used to open or close according to the control signal C. When C≥Cth, the solenoid valve is opened, Cth is a preset control threshold, and Cth>0; the preset control threshold Cth ensures that the solenoid valve will only open when receiving a control signal C of sufficient strength. The solenoid valve is made of low-temperature resistant materials to ensure that it can still work reliably in extremely low temperature environments.

[0084] The spraying mechanism is connected to the electromagnetic valve and is activated when the electromagnetic valve is turned on to spray the fire extinguishing medium. The spraying mechanism is designed with a multi-hole nozzle to ensure that the fire extinguishing medium can evenly cover the predetermined area.

[0085] For example:

[0086] Assume that a quick-response low-temperature fire sprinkler of the present invention is installed in a cold storage room of a cold chain logistics warehouse. At a certain moment, a fire is caused by a short circuit in an electrical device, and the temperature rises rapidly. At this time:

[0087] Fire alarm signal generation: The temperature sensing module detects a temperature change and generates a fire alarm signal F.

[0088] Signal reception: The signal receiver in the immediate spraying execution unit receives the fire alarm signal F.

[0089] Controller response: The controller detects the fire alarm signal F and outputs a control signal C.

[0090] Solenoid valve opening: Assume a preset control threshold Cth = 5V. When the control signal C output by the controller is greater than or equal to Cth, the solenoid valve opens.

[0091] Spraying mechanism start: After the solenoid valve opens, the spraying mechanism starts to spray the fire extinguishing medium, quickly covering the fire source area and suppressing the spread of the fire.

[0092] Through the above specific implementation manners, the immediate spraying execution unit of the present invention can quickly respond to the fire alarm signal in an extremely low temperature environment and start the fire extinguishing program in a timely manner. The immediate spraying execution unit can be quickly started after detecting the fire alarm signal, ensuring fire extinguishing at the initial stage of the fire. The immediate spraying execution unit of the present invention shows excellent fast response ability and reliable fire extinguishing performance in extremely low temperature environments such as cold chain logistics warehouses, significantly improving the fire safety level.

[0093] Exemplarily, the fire extinguishing agent storage device includes:

[0094] A liquid storage tank for storing a non-aqueous fire extinguishing medium suitable for low temperature environments. The liquid storage tank is made of low-temperature resistant materials to ensure good sealing performance and structural strength even at extremely low temperatures (such as -40°C);

[0095] A pressure detector for detecting the pressure P in the liquid storage tank and outputting a signal P' representing the current pressure;

[0096] A pressure regulator is connected to the pressure detector. When P' < Pmin or P' > Pmax, it automatically adjusts the pressure in the liquid storage tank to make P' return to the range of Pmin ≤ P' ≤ Pmax, where Pmin and Pmax are respectively preset minimum and maximum safe pressure values; the pressure regulator automatically adjusts the pressure in the liquid storage tank by pressurizing or depressurizing.

[0097] A spraying interface is connected to the liquid storage tank and the immediate spraying execution unit. When the immediate spraying execution unit starts, the fire extinguishing medium is released through the spraying interface. The spraying interface is designed with low-temperature resistant materials to ensure reliable connection and release of the fire extinguishing medium in a low temperature environment.

[0098] For example:

[0099] Assume that a quick-response low-temperature fire sprinkler of the present invention is installed in a cold storage room of a cold chain logistics warehouse. At a certain moment, a fire is caused by a short circuit in an electrical device, and the temperature rises rapidly. At this time:

[0100] Fire alarm signal generation: The temperature sensing module detects temperature changes and generates a fire alarm signal F.

[0101] The instant spraying execution unit is started: the signal receiver receives the fire alarm signal F, the controller outputs the control signal C, and when C≥Cth, the solenoid valve opens.

[0102] Pressure detector detection: Assume that the initial pressure in the liquid storage tank is P = 5 bar, the preset minimum safety pressure Pmin = 4 bar, and the maximum safety pressure Pmax = 6 bar. At this time, the pressure detector outputs a signal P' = 5 bar, which is within the safety range.

[0103] Pressure regulator operation: If the pressure in the storage tank drops to P′=3.5bar due to environmental changes, the pressure regulator automatically starts the pressurization mechanism to restore the pressure to above Pmin; if the pressure rises to P′=6.5bar, the pressure regulator starts the pressure relief mechanism to reduce the pressure to below Pmax.

[0104] Spray interface start: When the instant spray execution unit is started, the solenoid valve opens and releases the fire extinguishing medium through the spray interface, quickly covering the fire source area and suppressing the spread of fire.

[0105] Through the above-mentioned specific implementation methods, the fire extinguishing agent storage device of the present invention can ensure the stable storage of the fire extinguishing medium in an extremely low temperature environment and reliably release it when needed. Through the coordinated use of the pressure detector and the pressure regulator, it is ensured that the pressure in the storage tank is always within a safe range, and the fire extinguishing medium can be kept in a stable state even in a low temperature environment. When the instant spraying execution unit is started, the fire extinguishing medium can be quickly released through the spraying interface to ensure that the fire extinguishing medium can reach the predetermined area in time, thereby improving the fire extinguishing efficiency. In summary, the fire extinguishing agent storage device of the present invention exhibits excellent stable storage capacity and reliable release performance in extremely low temperature environments such as cold chain logistics warehouses, significantly improving the level of fire safety.

[0106] Exemplarily, the environment monitoring subsystem includes:

[0107] The temperature and humidity sensor is used to continuously monitor the temperature T and humidity H in the cold storage and output a signal TH indicating the current temperature and humidity;

[0108] The signal processor is connected to the temperature and humidity sensor, and is used to process the signal TH and calculate the temperature and humidity changes ΔT and ΔH; the signal processor calculates the difference between the current temperature and humidity and the temperature and humidity at the previous moment ΔT=Tcurrent-Tprevious, ΔH=Hcurrent-Hprevious.

[0109] An abnormality judgment unit, connected to the signal processor, is used to judge whether the calculated results ΔT and ΔH exceed preset thresholds Tth and Hth, and output an abnormality signal A when |ΔT|>Tth or |ΔH|>Hth;

[0110] The alarm controller is connected to the abnormal judgment unit, and triggers the alarm signal AL when receiving the abnormal signal A, wherein Tth and Hth are preset temperature and humidity abnormal thresholds respectively. When the abnormal judgment unit outputs the abnormal signal A, the alarm controller immediately triggers the alarm signal AL to notify the remote monitoring center or other related systems to take measures.

[0111] For example:

[0112] Assume that a quick-response low-temperature fire sprinkler of the present invention is installed in a cold storage room of a cold chain logistics warehouse. At a certain moment, the temperature and humidity in the cold storage change drastically due to equipment failure or other reasons. At this time:

[0113] Temperature and humidity monitoring: The temperature and humidity sensor continuously monitors the temperature T and humidity H in the cold storage, and outputs a signal TH indicating the current temperature and humidity.

[0114] Signal processing: The signal processor receives the signal TH and calculates the difference ΔT and ΔH between the current temperature and humidity and the previous temperature and humidity. Assuming that the current temperature changes from -20°C to -15°C and the humidity changes from 40% to 50%, then ΔT = 5°C and ΔH = 10%.

[0115] Abnormal judgment: Assuming that the preset temperature abnormal threshold Tth=3°C and the humidity abnormal threshold Hth=8%, then |ΔT|>Tth or |ΔH|>Hth is established, and the abnormal judgment unit outputs an abnormal signal A.

[0116] Alarm triggering: When the alarm controller receives abnormal signal A, it immediately triggers the alarm signal AL and notifies the remote monitoring center or other related systems to take measures.

[0117] Through the above specific implementation methods, the environmental monitoring subsystem of the present invention can continuously monitor the temperature and humidity changes in the cold storage in an extremely low temperature environment, and issue an alarm in time under abnormal conditions. The temperature and humidity sensor can continuously monitor the temperature and humidity changes in the cold storage to ensure that any abnormal conditions can be discovered in time.

[0118] Exemplarily, the fault warning module includes:

[0119] The temperature and humidity signal receiver is used to receive the temperature and humidity signal TH of the environment monitoring subsystem; the temperature and humidity signal receiver can receive data from the temperature and humidity sensor in real time and transmit it to the temperature and humidity change calculation unit.

[0120] The temperature and humidity change calculation unit is connected to the temperature and humidity signal receiver and is used to calculate the temperature and humidity change ΔT and ΔH; by calculating the difference between the current temperature and humidity and the temperature and humidity at the previous moment, ΔT=Tcurrent-Tprevious and ΔH=Hcurrent-Hprevious are obtained.

[0121] An abnormality detector, connected to the temperature and humidity change calculation unit, for detecting whether ΔT and ΔH exceed preset thresholds Tth and Hth, and outputting an abnormality detection signal AD when ΔT>Tth or ΔH>Hth;

[0122] The warning signal generator is connected to the abnormality detector and is used to generate a warning signal W when receiving the abnormality detection signal AD, wherein W=1 indicates abnormality, W=0 indicates normality, and Tth and Hth are preset temperature and humidity abnormality thresholds.

[0123] For example:

[0124] Assume that a quick-response low-temperature fire sprinkler of the present invention is installed in a cold storage room of a cold chain logistics warehouse. At a certain moment, the temperature and humidity in the cold storage change drastically due to equipment failure or other reasons. At this time:

[0125] Temperature and humidity signal reception: The temperature and humidity signal receiver receives the temperature and humidity signal TH output by the environmental monitoring subsystem.

[0126] Temperature and humidity change calculation: The temperature and humidity change calculation unit calculates the difference ΔT and ΔH between the current temperature and humidity and the previous temperature and humidity. Assuming that the current temperature changes from -20°C to -15°C and the humidity changes from 40% to 50%, ΔT = 5°C and ΔH = 10%.

[0127] Abnormal detection: Assuming that the preset temperature abnormal threshold Tth=3°C and the humidity abnormal threshold Hth=8%, then ΔT>Tth or ΔH>Hth holds, and the abnormal detector outputs an abnormal detection signal AD.

[0128] Warning signal generation: The warning signal generator receives the abnormal detection signal AD and immediately generates a warning signal W, where W=1, indicating that an abnormal condition exists in the current environment.

[0129] Through the above specific implementation manners, the fault warning module of the present invention can detect temperature and humidity anomalies in a very low temperature environment in a timely manner and issue a warning signal. The temperature and humidity signal receiver can receive the temperature and humidity signals TH of the environmental monitoring subsystem in real time to ensure that any abnormal situation can be detected in a timely manner. Through the preset temperature and humidity anomaly thresholds Tth and Hth, it is ensured that abnormal situations can be identified and reported in a timely manner under any circumstances, improving the reliability of the system.

[0130] Exemplarily, the communication interface includes:

[0131] A signal encoder for encoding the received warning signal W to generate an encoded signal CW; adopting a digital encoding method to convert the warning signal W into a format suitable for transmission over a communication network.

[0132] A transmission module connected to the signal encoder for sending the encoded signal CW to a remote monitoring center through a communication network; supporting multiple communication protocols to ensure effective communication with the remote monitoring center.

[0133] A status confirmation unit connected to the transmission module for confirming that the encoded signal CW has been successfully sent. If not, resend CW until confirmation is successful; confirm whether the encoded signal CW has been successfully sent by receiving a confirmation receipt signal from the remote monitoring center.

[0134] A retry counter connected to the status confirmation unit for recording the retry count N. When N reaches the preset maximum retry count Nmax, stop retrying, where Nmax > 0.

[0135] For example:

[0136] Suppose that in a cold storage room of a cold chain logistics warehouse, the fast-response low-temperature fire sprinkler of the present invention is installed. At a certain moment, due to equipment failure or other reasons, the temperature and humidity in the cold storage change sharply, and the fault warning module generates a warning signal W. At this time:

[0137] Signal encoding: The signal encoder receives the warning signal W = 1 and encodes it to generate an encoded signal CW.

[0138] Signal transmission: The transmission module sends the encoded signal CW to the remote monitoring center through a communication network.

[0139] Status confirmation: The status confirmation unit waits for a confirmation receipt signal from the remote monitoring center. Suppose the first transmission is not successful, and the status confirmation unit records the retry count N = 1.

[0140] Retry mechanism: The retry counter records the retry count N. Suppose the preset maximum retry count Nmax = 3. Then, when N < Nmax, the transmission module continues to retry sending the encoded signal CW.

[0141] Successful transmission: After the third retry, the remote monitoring center successfully receives the coded signal CW and sends a confirmation receipt signal to the status confirmation unit, and the status confirmation unit confirms that the transmission is successful.

[0142] Through the above specific implementation, the communication interface of the present invention can ensure the reliable transmission of the warning signal in an extremely low temperature environment, and retry when the transmission fails, and convert the warning signal into a coded signal CW through a signal encoder to ensure that the signal format is suitable for communication network transmission. The status confirmation unit confirms whether the coded signal CW is successfully sent by receiving a confirmation receipt signal from the remote monitoring center to ensure the reliability of signal transmission.

[0143] When the initial transmission fails, the status confirmation unit records the number of retries N and controls the number of retries through the retry counter until it is successfully sent or reaches the preset maximum number of retries Nmax. The preset maximum number of retries Nmax ensures that retries are stopped after multiple failed attempts, preventing infinite loops and improving system stability.

[0144] Exemplarily, the nozzle housing includes:

[0145] The main body shell is used to encapsulate the instant spray execution unit and other components; it is made of high-strength, low-temperature resistant materials to ensure that the structural stability and sealing performance can be maintained at extremely low temperatures.

[0146] The heat-insulating layer is arranged on the inner wall of the main shell to reduce the influence of the external low temperature on the internal components; high-performance heat-insulating materials such as polyurethane foam or aerogel are used to ensure that the internal components are not affected by the external low temperature environment.

[0147] The temperature maintaining layer fills the gap between the heat insulating layer and the main shell to keep the internal temperature within a predetermined range T_range, where T_range is the temperature range for ensuring the normal operation of the component; a material with heat-insulating properties, such as polystyrene foam or other heat-insulating materials, is used to ensure that the internal temperature is within the temperature range for the normal operation of the component.

[0148] The temperature monitoring unit is arranged in the main body shell, and is used to monitor the internal temperature T in real time and ensure that T is within T_range. When T is not within T_range, the temperature adjustment signal TS is triggered. When the monitored internal temperature TT is not within T_range, the temperature adjustment signal TS is triggered to start the temperature adjustment mechanism.

[0149] For example:

[0150] Assuming that a quick-response low-temperature fire sprinkler of the present invention is installed in a cold storage room of a cold chain logistics warehouse, at a certain moment, the temperature in the cold storage room drops suddenly, causing the temperature of the internal components of the sprinkler to drop.

[0151] at this time:

[0152] Main body shell encapsulation: The main body shell of the nozzle housing encapsulates the instant spraying execution unit and other components to ensure that all components work in a closed environment.

[0153] Thermal insulation layer isolation: The thermal insulation layer effectively prevents the external low temperature from being transferred to the inside, reducing the impact of the external environment on internal components.

[0154] Temperature retention layer insulation: The temperature retention layer is filled between the insulation layer and the main shell to ensure that the internal temperature is within the predetermined range T_range. Even if the external temperature drops sharply, the internal temperature can be maintained within the normal working range.

[0155] Temperature monitoring unit monitoring: The temperature monitoring unit monitors the internal temperature T in real time. Assume that the internal temperature TT drops to Tmin = -30°C, and the preset working temperature range T_range is -25-25°C to 55°C. At this time, the internal temperature TT is lower than Tmin, and the temperature monitoring unit triggers the temperature adjustment signal TS.

[0156] Temperature adjustment mechanism starts: When the temperature monitoring unit receives the temperature adjustment signal TS, it starts the temperature adjustment mechanism, such as a heating element or other insulation measures, to adjust the internal temperature to within T_range to ensure the normal operation of the internal components.

[0157] Through the above specific implementation, the nozzle housing of the present invention can ensure the normal operation of the internal components in an extremely low temperature environment, and the main body shell encapsulates all internal components to ensure that they work in a closed environment and are not affected by the external environment. The temperature monitoring unit monitors the internal temperature in real time and triggers the temperature adjustment signal TS when the temperature exceeds a predetermined range, ensuring that the internal temperature is always within the normal operating range.

[0158] Exemplarily, the nozzle comprises:

[0159] A nozzle, matched with the nozzle housing, is designed as a porous distribution structure to ensure that the fire extinguishing agent can be evenly dispersed to form a predetermined spraying pattern;

[0160] The spray angle adjustment device cooperates with the nozzle design to adjust the spray angle θ to ensure that the fire extinguishing agent covers a predetermined area R, where R is a preset spraying coverage area; the spray angle adjustment device can be adjusted manually or electrically to ensure that the spray angle θ can be adjusted according to actual needs to cover the predetermined area.

[0161] The spray distance control unit is connected to the spray angle adjustment device and is used to control the spray distance D to ensure that the best coverage effect is achieved at a predetermined distance D_target, where D_target is the preset optimal spray distance; the spray distance control unit can adjust the spray distance D by changing the spray pressure, etc., to ensure that the fire extinguishing agent forms the best coverage effect at D_target.

[0162] The nozzle flow control valve is connected to the spray distance control unit and is used to adjust the nozzle flow Q, where Q = k*D^2*θ, k is the flow coefficient. The nozzle flow control valve adjusts the spray flow Q to ensure that the fire extinguishing agent flow can reach the optimal value under different spray distances D and spray angles θ.

[0163] For example:

[0164] Assume that a quick-response low-temperature fire sprinkler of the present invention is installed in a cold storage room of a cold chain logistics warehouse. At a certain moment, a fire breaks out in the cold storage room and the sprinkler needs to be activated quickly to extinguish the fire. At this time:

[0165] Nozzle design: The nozzle is designed with a porous distribution structure to ensure that the fire extinguishing agent can be evenly dispersed to form a predetermined spraying pattern.

[0166] Spray angle adjustment: The spray angle adjustment device adjusts the spray angle θ to ensure that the fire extinguishing agent covers the predetermined area R. Assuming that the preset spray coverage area R is 10 square meters, the spray angle θ is set to 30°.

[0167] Spray distance control: The spray distance control unit adjusts the spray distance D to ensure the best coverage effect at the preset distance D_target. Assume that the preset optimal spray distance D_target is 5 meters.

[0168] Nozzle flow regulation: The nozzle flow control valve adjusts the nozzle flow Q to ensure that the extinguishing agent flow rate can reach the optimal value under different spraying distances D and spraying angles θ. Assuming the flow coefficient k = 0.01, the nozzle flow rate Q = 0.01·52·30°≈0.75L / min.

[0169] Through the above specific implementation, the nozzle of the present invention can ensure that the fire extinguishing agent evenly covers the predetermined area in an extremely low temperature environment, and the nozzle is designed as a porous distribution structure to ensure that the fire extinguishing agent can be evenly dispersed to form a predetermined spraying pattern. The injection angle adjustment device and the injection distance control unit can flexibly adjust the injection angle θ and the injection distance D to ensure that the fire extinguishing agent covers the predetermined area R.

[0170] The spray distance control unit ensures the best coverage effect at a predetermined distance, improving the fire extinguishing efficiency. The nozzle flow control valve adjusts the spray flow rate Q to ensure that the fire extinguishing agent flow rate is optimal at different spray distances D and spray angles θ, enhancing the reliability and effectiveness of the system.

[0171] The alarm trigger condition setting module of the present invention is one of the important components in the fast-response low-temperature fire sprinkler system, and is used to issue an alarm in a timely manner when the environmental monitoring subsystem detects that the temperature and humidity exceed the preset safety range. The following details the specific implementation manner and its effects of the alarm trigger condition setting module.

[0172] The implementation details are as follows:

[0173] Threshold setting unit:

[0174] Function: Used to set the preset safety ranges Tsafe and Hsafe of temperature and humidity.

[0175] Setting range: Set the safe temperature range Tmin ≤ T ≤ Tmax and the safe humidity range Hmin ≤ H ≤ Hmax, where Tmin and Tmax are the upper and lower limits of the preset safe temperature, and Hmin and Hmax are the upper and lower limits of the preset safe humidity.

[0176] Monitoring comparator:

[0177] Function: Connected to the threshold setting unit, used to compare the monitored actual temperature and humidity values T and H with the preset safety ranges Tsafe and Hsafe.

[0178] Comparison mechanism: The monitoring comparator obtains the current temperature and humidity values in real time and compares them with the preset safety range.

[0179] Alarm trigger:

[0180] Function: Connected to the monitoring comparator, used to output an alarm signal AL when the temperature and humidity exceed the preset safety range.

[0181] Trigger condition: When T < Tmin or T > Tmax or H < Hmin or H > Hmax, the alarm trigger outputs an alarm signal AL = 1, otherwise AL = 0.

[0182] Alarm delay unit:

[0183] Function: Connected to the alarm trigger, used to wait for a preset delay time tdelay before outputting the alarm signal AL to filter out short-term temperature and humidity fluctuations.

[0184] Delay mechanism: When the alarm trigger outputs an alarm signal AL = 1, the alarm delay unit starts timing tdelay. If AL is still 1 after the delay time ends, the alarm is finally activated.

[0185] For example:

[0186] Suppose that in the cold storage room of a cold chain logistics warehouse, the rapid response low-temperature fire sprinkler of the present invention is installed. The preset safe temperature range in the cold storage room is from -25°C to 0°C, and the humidity range is from 30% to 70%. At a certain moment, the temperature and humidity in the cold storage room change. At this time:

[0187] Threshold setting: Set the safe temperature range Tmin = -25, Tmax = 0T°C; set the safe humidity range Hmin = 30%, Hmax = 70%.

[0188] Monitoring and comparison: The monitoring comparator obtains the current temperature and humidity values in real time. Suppose the current temperature is T = -28 and the humidity is H = 25%, then T < Tmin and H < Hmin.

[0189] Alarm trigger: The alarm trigger detects that T < Tmin and H < Hmin, and outputs an alarm signal AL = 1.

[0190] Alarm delay: The alarm delay unit starts timing the preset delay time tdelay = 1 minute. Suppose the temperature and humidity do not return to normal during the delay time, and the alarm delay unit activates the alarm after the end of the delay time.

[0191] Through the above specific implementation manners, the alarm trigger condition setting module of the present invention can timely detect abnormal temperature and humidity in an extremely low temperature environment and issue an alarm, having the following remarkable effects:

[0192] Real-time monitoring: The monitoring comparator can obtain the current temperature and humidity values in real time and compare them with the preset safe range to ensure that any abnormal situation can be detected in time.

[0193] Accurate judgment: By setting the safe temperature range and the safe humidity range, it is ensured that when the temperature and humidity exceed the safe range, it can be accurately judged whether to trigger the alarm signal AL.

[0194] Timely alarm: When it is detected that the temperature and humidity exceed the preset safe range, the alarm trigger immediately outputs the alarm signal AL, and the alarm delay unit confirms that the abnormal situation is not a short-term fluctuation, so as to ensure that the remote monitoring center or other relevant systems can take measures in time.

[0195] High reliability: Through the preset abnormal temperature and humidity thresholds Tmin, Tmax, Hmin and Hmax, and the preset delay time tdelay, it is ensured that any abnormal situation can be timely identified and reported, improving the reliability of the system.

[0196] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fast-response low-temperature fire sprinkler used in cold chain, characterized in that: Comprising: A temperature sensing module for detecting heat changes generated by a fire source in an extremely low temperature environment; An immediate spraying execution unit connected to the temperature sensing module for initiating the spraying of a fire extinguishing agent according to the heat change; A fire extinguishing agent storage device connected to the immediate spraying execution unit to provide a fire extinguishing medium; An environmental monitoring subsystem integrated inside a fire sprinkler for continuously monitoring temperature and humidity fluctuations in a cold storage; A fault warning module coupled to the environmental monitoring subsystem for identifying abnormal conditions based on the temperature and humidity fluctuations.

2. According to claim 1, a quick response low temperature fire sprinkler for cold chain application, characterized in that: The temperature sensing module includes: A thermosensitive element for detecting heat changes generated by a fire source and generating an electrical signal S proportional to the heat change, where S = k * ΔT, k is a proportionality coefficient and k > 0; A signal processing circuit connected to the thermosensitive element for receiving the electrical signal S and performing amplification processing to obtain an amplified signal S'; A signal comparison unit connected to the signal processing circuit for comparing the amplified signal S' with a preset threshold Sth. When S' ≥ Sth, a fire alarm signal F is triggered. Sth is a preset activation threshold and Sth > 0.

3. According to claim 2, a fast response low temperature fire sprinkler for cold chain application, characterized in that: The immediate spraying execution unit includes: A signal receiver for receiving the fire alarm signal F; A controller connected to the signal receiver for outputting a control signal C when receiving the fire alarm signal F; An electromagnetic valve connected to the controller for opening or closing according to the control signal C. When C ≥ Cth, the electromagnetic valve opens. Cth is a preset control threshold and Cth > 0; A spraying mechanism connected to the electromagnetic valve for starting to spray the fire extinguishing medium when the electromagnetic valve opens.

4. A quick response low temperature fire sprinkler for cold chain according to claim 3, characterized in that: The fire extinguishing agent storage device includes: A liquid storage tank for storing the fire extinguishing medium; A pressure detector for detecting the pressure P inside the liquid storage tank and outputting a signal P' representing the current pressure; A pressure regulator connected to the pressure detector for automatically adjusting the pressure inside the liquid storage tank when P' < Pmin or P' > Pmax to return P' to the range of Pmin ≤ P' ≤ Pmax. Pmin and Pmax are respectively preset minimum and maximum safe pressure values; A spraying interface connected to the liquid storage tank and the immediate spraying execution unit for releasing the fire extinguishing medium through the spraying interface when the immediate spraying execution unit starts.

5. A quick response low temperature fire sprinkler for cold chain according to claim 4, characterized in that: The environmental monitoring subsystem includes: A temperature and humidity sensor for continuously monitoring the temperature T and humidity H inside the cold storage and outputting a signal TH representing the current temperature and humidity; A signal processor connected to the temperature and humidity sensor for processing the signal TH and calculating the temperature and humidity change amounts ΔT and ΔH; An abnormality judgment unit connected to the signal processor for judging whether the calculated results ΔT and ΔH exceed preset thresholds Tth and Hth. When |ΔT| > Tth or |ΔH| > Hth, an abnormality signal A is output; An alarm controller connected to the abnormality judgment unit for triggering an alarm signal AL when receiving the abnormality signal A, where Tth and Hth are respectively preset temperature and humidity abnormality thresholds.

6. A quick response low temperature fire sprinkler for cold chain application according to claim 5, characterized in that: The fault warning module includes: A temperature and humidity signal receiver, used to receive the temperature and humidity signal TH of the environment monitoring subsystem; A temperature and humidity variation calculation unit, connected to the temperature and humidity signal receiver, for calculating the temperature and humidity variation ΔT and ΔH; An abnormality detector, connected to the temperature and humidity change calculation unit, for detecting whether ΔT and ΔH exceed preset thresholds Tth and Hth, and outputting an abnormality detection signal AD when ΔT>Tth or ΔH>Hth; The warning signal generator is connected to the abnormality detector and is used to generate a warning signal W when receiving the abnormality detection signal AD, wherein W=1 indicates abnormality, W=0 indicates normality, and Tth and Hth are preset temperature and humidity abnormality thresholds.

7. A quick response low temperature fire sprinkler for cold chain application according to claim 6, characterized in that: It also includes a communication interface embedded in the fault warning module, which is used to transmit the abnormal condition information to a remote monitoring center, and the communication interface includes: A signal encoder is used to encode the received warning signal W to generate a coded signal CW; A transmission module, connected to the signal encoder, for sending the encoded signal CW to a remote monitoring center via a communication network; A status confirmation unit, connected to the transmission module, for confirming that the coded signal CW is successfully sent, and if unsuccessful, resending the CW until success is confirmed; A retry counter is connected to the state confirmation unit and is used to record the number of retries N. When N reaches a preset maximum number of retries Nmax, the retry is stopped, and Nmax>0.

8. A quick response low temperature fire sprinkler for cold chain application according to claim 7, characterized in that: It also includes a nozzle housing for packaging the instant spray execution unit and other components, and the nozzle housing includes: A main body shell, used to encapsulate the instant spray execution unit and other components; A heat insulation layer, arranged on the inner wall of the main shell, to reduce the influence of external low temperature on internal components; A temperature-maintaining layer is filled in the gap between the heat-insulating layer and the main shell to maintain the internal temperature within a predetermined range T_range, where T_range is a temperature range to ensure the normal operation of the component; The temperature monitoring unit is arranged in the main body shell, and is used for real-time monitoring of the internal temperature T and ensuring that T is within T_range. When T is not within T_range, the temperature adjustment signal TS is triggered.

9. A quick response low temperature fire sprinkler for cold chain application according to claim 8, characterized in that: Also included is a nozzle, matched with the nozzle housing, for optimizing the fire extinguishing agent distribution pattern to cover a predetermined area, the nozzle comprising: A nozzle, matched with the nozzle housing, for forming a spray pattern of a specific shape; A spray angle adjustment device, in cooperation with the nozzle design, is used to adjust the spray angle θ to ensure that the fire extinguishing agent covers a predetermined area R, where R is a preset spray coverage area; A spray distance control unit, connected to the spray angle adjustment device, for controlling the spray distance D to ensure that the best coverage effect is achieved at a predetermined distance D_target, where D_target is a preset optimal spray distance; The nozzle flow control valve is connected to the injection distance control unit and is used to adjust the nozzle flow Q, wherein Q=k*D^2*θ, and k is the flow coefficient.

10. A quick response low temperature fire sprinkler for cold chain according to claim 1, characterized in that: It further includes an alarm trigger condition setting module, which is managed by the fault warning module and activates an alarm when it is detected that the temperature and humidity exceed the preset safe range. The alarm trigger condition setting module includes: A threshold setting unit for setting the preset safe ranges Tsafe and Hsafe of temperature and humidity; A monitoring comparator connected to the threshold setting unit for comparing the detected actual temperature and humidity values T and H with the preset safe ranges Tsafe and Hsafe; An alarm trigger connected to the monitoring comparator. When T or H exceeds the preset safe range Tsafe or Hsafe, it outputs an alarm signal AL. When T < Tmin or T > Tmax or H < Hmin or H > Hmax, AL = 1; otherwise, AL = 0, where Tmin, Tmax, Hmin, and Hmax are the lower and upper limits of the preset safe temperature and humidity respectively; An alarm delay unit connected to the alarm trigger for waiting for a preset delay time t_delay before outputting the alarm signal AL to filter out short-term temperature and humidity fluctuations. When the delay time t_delay ends, if AL is still 1, the alarm is finally activated.

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