Energy-saving system for refrigeration of ship dry cargo warehouse

Abstract

The invention relates to the technical field of ship dry cargo warehouses, and discloses an energy-saving system for refrigeration of a ship dry cargo warehouse, and the energy-saving system comprises a central air-conditioning surplus wind utilization module which is used for obtaining surplus wind of a ship central air-conditioning system; the air pipe conveying module is connected with the central air conditioner surplus air utilization module and used for conveying the obtained surplus air to the dry goods warehouse; the air distribution adjusting module is connected with the air pipe conveying module and used for adjusting the air quantity and the air direction entering the dry goods warehouse; a central air-conditioning system serving sailors is designed on the ship, the system has certain surplus capacity, the characteristic is ingeniously utilized by an optimization scheme, and only one section of air-conditioning air pipe and one air-conditioning air distributor need to be additionally arranged, so that the temperature regulation of the dry goods warehouse can be realized, and the refrigeration effect is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship dry cargo warehouse, in particular to an energy-saving system for ship dry cargo warehouse refrigeration. BACKGROUND

[0002] In the design of conventional ships, in order to ensure the safety of food preservation during long-term sea voyage, a refrigeration system is specially equipped. This system covers fish warehouse, meat warehouse, vegetable warehouse and dry cargo warehouse, among which the fish warehouse and meat warehouse belong to low-temperature warehouse, and the vegetable warehouse and dry cargo warehouse belong to high-temperature warehouse. Based on such layout, 2 low-temperature air coolers, 2 high-temperature air coolers, 4 sets of expansion valve groups and corresponding pipelines are configured, as shown in Figure 10

[0003] Although this traditional configuration can meet the basic requirements, the dry cargo warehouse has a lower temperature requirement, which is usually controlled at +12℃ to +18℃, or even acceptable at room temperature, resulting in a redundant design capacity of the ship refrigeration device, which easily triggers the trip mechanism during operation, increasing the equipment procurement cost. At the same time, the continuous refrigeration of the dry cargo warehouse consumes a large amount of power, increases the ship fuel consumption, and further increases the operation and maintenance burden. Therefore, an energy-saving system for ship dry cargo warehouse refrigeration is provided. SUMMARY

[0004] The purpose of the present application is to provide an energy-saving system for ship dry cargo warehouse refrigeration to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present application provides the following technical scheme: an energy-saving system for ship dry cargo warehouse refrigeration, comprising: a central air conditioning surplus air utilization module for obtaining surplus air of a ship central air conditioning system; an air pipe conveying module connected with the central air conditioning surplus air utilization module for conveying the obtained surplus air to the dry cargo warehouse; an air distribution adjustment module connected with the air pipe conveying module for adjusting the air quantity and direction entering the dry cargo warehouse; a temperature monitoring and control module connected with the air distribution adjustment module and a temperature sensor arranged in the dry cargo warehouse, for controlling the air distribution adjustment module to adjust the air supply quantity to maintain the set temperature range of the dry cargo warehouse according to the dry cargo warehouse temperature information fed back by the temperature sensor; a safety protection module connected with the air pipe conveying module for monitoring the air pressure in the air pipe and taking protective measures when the air pressure exceeds the set value; an energy management module connected with the central air conditioning surplus air utilization module and the air distribution adjustment module for monitoring the system energy consumption and optimizing the energy use according to the preset strategy; ​The intelligent early warning module is connected with key devices and environmental sensors of the system, and is used for monitoring device states and environmental parameters and issuing early warning when an abnormality occurs. The cargo information management module is connected with the temperature monitoring and control module, and is used for collecting and managing cargo information and assisting in adjusting the temperature of the dry cargo warehouse according to the cargo storage requirements.

[0006] Preferably, the central air conditioning surplus air utilization module is connected with the air pipe conveying module through flange connection or socket connection; when the diameter of the air taking port and the newly added air conditioning air pipe is greater than 300 mm, the flange connection is adopted, the flange plates with the same material, sufficient strength and sealing performance as the air pipe are installed at the air taking port and the end of the air pipe, the rubber sealing gasket with a thickness of 3-5 mm is placed between the flange plates, and then the bolts meeting the design requirements are uniformly tightened; when the diameter is less than 300 mm, the socket connection is adopted, one end of the newly added air conditioning air pipe is inserted into the socket of the air taking port, the insertion depth is not less than 1.5 times the diameter of the air pipe, the sealing glue with good adhesion and weather resistance is applied at the socket, and then the clamp or iron wire is used for firm fixation.

[0007] Preferably, the air pipe conveying module is connected with the air distribution and adjustment module through screw connection or clamp connection; if the air inlet of the air distributor and the end of the air conditioning air pipe are provided with threaded interfaces, the screw connection is adopted, the raw material belt with the same direction as the screw tightening direction is wound around the end of the air pipe for 3-5 turns, then the air inlet of the air distributor is screwed with the end of the air pipe, and a suitable wrench is used to avoid excessive force and damage the threads; for the air distributor and the air pipe without threaded interfaces, the clamp connection is used, the air inlet of the air distributor is aligned with the end of the air conditioning air pipe, then the clamp matched with the diameter of the air pipe is sleeved at the connection, and the tool is used to tighten the clamp to ensure that the connection is tight and there is no air leakage.

[0008] Preferably, the temperature monitoring and control module comprises a temperature controller connected with a plurality of temperature sensors installed in the dry cargo warehouse through shielded signal lines, and is used for receiving temperature information at different positions in the dry cargo warehouse; the temperature controller is connected with the air volume adjustment valve control circuit of the central air conditioning system or the air volume adjustment controller of the air distributor, when the temperature in the warehouse is higher than the set upper limit, an air volume increasing signal is sent to make the air volume adjustment valve open or the air inlet opening of the air distributor increase; when the temperature in the warehouse is lower than the set lower limit, an air volume decreasing signal is sent to make the air volume adjustment valve close or the air inlet opening of the air distributor decrease.

[0009] Preferably, the safety protection module comprises a wind pressure sensor and an overload protection relay, the wind pressure sensor is installed on the air supply path of the air duct of the air conditioner, for monitoring the wind pressure in the air duct and transmitting the signal to the overload protection relay; the overload protection relay compares the received wind pressure signal with the preset upper limit of the wind pressure, when the wind pressure in the air duct exceeds the set value, the overload protection relay acts, cuts off the air supply through the control circuit or sends an alarm signal, and at the same time connects the signal to the alarm system of the ship.

[0010] Preferably, the energy management module comprises an energy monitoring device and a control strategy implementation unit, the energy monitoring device comprises power monitoring instruments installed on the power supply lines of the central air conditioning system, air volume regulating device and other electric equipment, and cold quantity metering devices installed on the air duct of the air conditioner, for monitoring the parameters such as power, current, voltage and cold quantity supplied to the dry cargo warehouse in real time; the control strategy implementation unit is connected with the centralized control system and the temperature monitoring and control module of the ship through the communication network, and formulates and implements the energy control strategy according to the collected energy data and the temperature demand of the dry cargo warehouse, such as increasing the utilization of excess air during the low price period.

[0011] Preferably, the intelligent early warning module comprises a device state sensor, an environment sensor and a early warning analysis unit, the device state sensor is installed on the key devices such as the central air conditioning system, air volume regulating device and air distributor, for monitoring the state parameters such as vibration and temperature of the devices; the environment sensor is installed in the dry cargo warehouse, for monitoring the environmental parameters such as humidity and gas concentration; the early warning analysis unit analyzes the collected device state and environmental parameter data, uses the preset early warning model to judge whether there is an abnormal situation, sends an early warning signal when an abnormality is detected, and connects the alarm signal to the alarm system of the ship.

[0012] Preferably, the cargo information management module comprises a cargo information collection device and an information processing unit, the cargo information collection device comprises a bar code scanning device installed at the entrance of the dry cargo warehouse and a weight sensor installed in the cargo storage area, for collecting information such as the type, size, quantity, storage requirement and weight change of the cargo; the information processing unit transmits the collected cargo information to the temperature monitoring and control module, which automatically adjusts the temperature set value and air supply of the dry cargo warehouse according to the storage requirement of the cargo; at the same time, the information processing unit records and manages the in-and-out warehouse situation of the cargo, updates the inventory information in real time, and issues an early warning in advance according to the shelf life and storage conditions of the cargo.

[0013] Preferably, the remote monitoring and operation module is connected with the centralized control system of the ship through the communication network of the ship, and the ship staff can view the temperature, air supply, equipment running state, energy consumption, equipment warning information and cargo inventory information of the dry cargo warehouse in real time through the remote monitoring and operation module in the bridge or other control center, and remotely operate the system according to the loading and unloading of the cargo, the change of the sailing environment or the actual demand, such as adjusting the temperature setting value, changing the air supply, modifying the energy management parameters and setting the warning threshold.

[0014] Preferably, the system maintenance module comprises a regular cleaning unit, an equipment state checking unit and an equipment calibration unit; the regular cleaning unit is used for regularly cleaning the air conditioner air pipe, the air distributor, the temperature sensor, the energy monitoring equipment and the warning sensor; the equipment state checking unit is used for daily inspection of the system by the ship staff and comprehensive maintenance of the system at certain time intervals; and the equipment calibration unit is used for calibration of the temperature controller, the energy monitoring equipment and the warning sensor at certain time intervals, so as to ensure the normal operation of the system and the accuracy of the measurement data.

[0015] Compared with the prior art, the application has the following beneficial effects: The ship dry cargo warehouse refrigeration system is optimized, and remarkable beneficial effects are achieved. Considering that the central air conditioning system for the crew has been designed on the ship, and the system has certain surplus capacity, the optimization scheme ingeniously utilizes this feature, and only one air conditioner air pipe and one air conditioner air distributor need to be added to realize temperature regulation of the dry cargo warehouse and achieve the refrigeration effect. Compared with the prior art, this scheme saves one high-temperature air cooler, one set of electromagnetic valve expansion valve group and a plurality of copper pipes, greatly reducing the procurement cost and installation cost of the equipment. At the same time, since the dry cargo warehouse is supplied with air through the branch pipe of the central air conditioning system, the required air volume and refrigeration capacity are no longer included in the capacity of the central air conditioning system. This means that the central air conditioning system does not need to increase the load to meet the refrigeration demand of the dry cargo warehouse, effectively avoiding the problem of jump shift caused by excessive load, reducing the maintenance cost and equipment replacement cost caused by equipment failure, and improving the stability and reliability of the system. In terms of energy consumption, the optimized scheme has obvious advantages. It fully utilizes the surplus capacity of the central air conditioning system to refrigerate the dry cargo warehouse, without additional power consumption. During the sailing process of the ship, no additional power is needed for the refrigeration function of the dry cargo warehouse, thereby reducing the fuel consumption of the ship. This not only reduces the operating cost, but also meets the environmental protection requirements, reducing the impact of ship operation on the environment. From the maintenance point of view, after reducing a large number of refrigeration equipment, the maintenance workload of the ship is greatly reduced. Maintenance personnel do not need to frequently check, repair and maintain high-temperature air cooler, electromagnetic valve expansion valve group and other equipment, save maintenance time and labor cost, further reduce the maintenance cost of the ship; In summary, the optimization scheme of the ship dry cargo warehouse refrigeration system this time, by reasonably utilizing the surplus resources of the central air conditioning system, has achieved remarkable results in reducing equipment cost, energy consumption and maintenance cost, effectively improving the economic benefit and market competitiveness of the ship, and bringing real benefits to the ship owner.

[0016] The part not involved in the device is the same as or can be realized by the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a connection diagram of the energy-saving system for ship dry cargo warehouse refrigeration of the application; Figure 2 is a temperature monitoring and control module schematic diagram of the energy-saving system for ship dry cargo warehouse refrigeration of the application; Figure 3 is a safety protection module schematic diagram of the energy-saving system for ship dry cargo warehouse refrigeration of the application; Figure 4 is a air distribution adjustment module schematic diagram of the energy-saving system for ship dry cargo warehouse refrigeration of the application; Figure 5 is an energy management module schematic diagram of the energy-saving system for ship dry cargo warehouse refrigeration of the application; Figure 6 is an intelligent early warning module schematic diagram of the energy-saving system for ship dry cargo warehouse refrigeration of the application; Figure 7 is a goods information management module schematic diagram of the energy-saving system for ship dry cargo warehouse refrigeration of the application; Figure 8 is a remote monitoring and operation module schematic diagram of the energy-saving system for ship dry cargo warehouse refrigeration of the application; Figure 9 is a system maintenance module schematic diagram of the energy-saving system for ship dry cargo warehouse refrigeration of the application; Figure 10 is a conventional refrigeration principle diagram of the existing ship Figure 11 is a schematic diagram of the application for refrigeration of dry cargo warehouse by using the central air conditioning system on the ship. DETAILED DESCRIPTION

[0018] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application.

[0019] Embodiment one: please refer to Figures 1-7 , Figure 10 , Figure 11 The present application provides a technical solution: an energy-saving system for refrigeration of a ship dry cargo warehouse, comprising: A central air conditioning surplus air utilization module is used to obtain surplus air of a ship central air conditioning system; A duct conveying module is connected with the central air conditioning surplus air utilization module and is used to convey the obtained surplus air to the dry cargo warehouse; An air distribution adjustment module is connected with the duct conveying module and is used to adjust the air volume and direction entering the dry cargo warehouse; A temperature monitoring and control module is connected with the air distribution adjustment module and a temperature sensor arranged in the dry cargo warehouse, and according to the dry cargo warehouse temperature information fed back by the temperature sensor, the air distribution adjustment module is controlled to adjust the air supply volume to maintain the dry cargo warehouse set temperature range; A safety protection module is connected with the duct conveying module and is used to monitor the air pressure in the duct and take protective measures when the air pressure exceeds a set value; An energy management module is connected with the central air conditioning surplus air utilization module and the air distribution adjustment module, and is used to monitor the system energy consumption and optimize energy use according to a preset strategy; An intelligent early warning module is connected with each key device of the system and an environmental sensor, and is used to monitor the device state and environmental parameters and issue a warning when an abnormality occurs; A cargo information management module is connected with the temperature monitoring and control module, and is used to collect and manage cargo information and assist in adjusting the dry cargo warehouse temperature according to cargo storage requirements.

[0020] The central air conditioning surplus air utilization module and the duct conveying module are connected through flanges or sockets; when the diameter of the air intake port and the newly added air conditioning duct is greater than 300mm, flange connection is adopted, a flange plate with the same material as the duct, sufficient strength and sealing performance is installed at the end of the air intake port and the duct, a rubber sealing gasket with a thickness of 3-5mm is placed between the flange plates, and then a bolt that meets the design requirements is uniformly tightened; when the diameter is less than 300mm, socket connection is adopted, one end of the newly added air conditioning duct is inserted into the socket of the air intake port, the insertion depth is not less than 1.5 times the diameter of the duct, sealing glue with good adhesion and weather resistance is applied at the socket, and then a clamp or iron wire is used to fix it firmly.

[0021] The air duct conveying module and the air distribution adjusting module are connected by screw threads or a clamp; if the air inlet of the air distributor and the end of the air duct have a threaded interface, the screw thread connection is adopted, the air inlet of the air distributor is screwed to the end of the air duct after 3-5 turns of raw material belt are wound on the end of the air duct in the same direction as the screw thread tightening direction, and a suitable wrench is used to avoid excessive force and damage the screw threads; for the air distributor and the air duct without a threaded interface, the clamp connection is used, the air inlet of the air distributor is aligned with the end of the air duct of the air conditioner, then a clamp matched with the diameter of the air duct is sleeved on the connection, and a tool is used to tighten the clamp to ensure that the connection is tight and there is no air leakage.

[0022] The temperature monitoring and control module includes a temperature controller connected with a plurality of temperature sensors installed in the dry cargo hold through shielded signal lines for receiving temperature information at different positions in the dry cargo hold; the temperature controller is connected with the air volume adjusting valve control circuit of the central air conditioning system or the air volume adjusting controller of the air distributor, when the temperature in the hold is higher than the set upper limit, an air volume increasing signal is sent to make the air volume adjusting valve open or the air inlet opening of the air distributor increase; when the temperature in the hold is lower than the set lower limit, an air volume decreasing signal is sent to make the air volume adjusting valve close or the air inlet opening of the air distributor decrease.

[0023] The safety protection module includes an air pressure sensor and an overload protection relay, the air pressure sensor is installed on the air supply path of the air duct of the air conditioner for monitoring the air pressure in the air duct and transmitting the signal to the overload protection relay; the overload protection relay compares the received air pressure signal with the preset upper limit value of the air pressure, when the air pressure in the air duct exceeds the set value, the overload protection relay acts to cut off the air supply or send an alarm signal, and the signal is connected to the alarm system of the ship at the same time.

[0024] The energy management module includes an energy monitoring device and a control strategy implementation unit, the energy monitoring device includes power monitoring instruments installed on the power supply lines of the central air conditioning system, air volume adjusting devices and other electric devices, and cold quantity metering devices installed on the air duct of the air conditioner for real-time monitoring of parameters such as the power, current, voltage of the devices and the cold quantity sent into the dry cargo hold; the control strategy implementation unit is connected with the centralized control system of the ship and the temperature monitoring and control module through a communication network, formulates and implements an energy control strategy according to the collected energy data and the temperature demand of the dry cargo hold, such as increasing the utilization of excess air during the low price period.

[0025] The intelligent early warning module comprises a device state sensor, an environment sensor and an early warning analysis unit, the device state sensor is installed on key devices such as a central air conditioning system, an air volume adjusting device and an air distributor, and is used for monitoring state parameters such as vibration and temperature of the devices; the environment sensor is installed in the dry cargo warehouse, and is used for monitoring environmental parameters such as humidity and gas concentration; the early warning analysis unit analyzes the collected device state and environmental parameter data, judges whether an abnormal situation exists by using a preset early warning model, issues an early warning signal when detecting an abnormality, and connects the alarm signal to an alarm system of the ship.

[0026] The cargo information management module comprises a cargo information collection device and an information processing unit, the cargo information collection device comprises a bar code scanning device installed at an entrance of the dry cargo warehouse and a weight sensor installed in a cargo storage area, and is used for collecting information such as types, specifications, quantities, storage requirements and weight changes of the cargos; the information processing unit transmits the collected cargo information to the temperature monitoring and control module, the temperature monitoring and control module automatically adjusts a temperature set value and an air supply of the dry cargo warehouse according to the storage requirements of the cargos; meanwhile, the information processing unit records and manages in-out warehouse conditions of the cargos, updates inventory information in real time, and issues an early warning in advance according to a shelf life and storage conditions of the cargos.

[0027] Embodiment two: please refer to Figures 1-11 The present application provides a technical solution: the present application provides a technical solution: an energy-saving system for refrigeration of a dry cargo warehouse of a ship, in the embodiment, the same as in embodiment one, please refer to Figure 8 Further comprising a remote monitoring and operation module, the remote monitoring and operation module is connected to a centralized control system of the ship through a communication network of the ship, and a ship worker can view parameters such as temperature, air supply, device running state, energy consumption, device early warning information and cargo inventory information of the dry cargo warehouse in real time through the remote monitoring and operation module in a bridge house or other control center, and remotely operates the system according to loading and unloading conditions of the cargos, changes in a sailing environment or actual needs, such as adjusting a temperature set value, changing an air supply, modifying energy management parameters and setting an early warning threshold.

[0028] Please refer to Figure 9 Further comprising a system maintenance module, the system maintenance module comprises a regular cleaning unit, a device state checking unit and a device calibration unit; the regular cleaning unit is used for regularly cleaning air conditioning air pipes, air distributors, temperature sensors, energy monitoring devices and early warning sensors; the device state checking unit is used for daily inspection of the system by the ship worker and overall maintenance of the system at certain time intervals; and the device calibration unit is used for calibration of the temperature controller, the energy monitoring device and the early warning sensor at certain time intervals, so as to ensure normal operation of each module of the system and accuracy of measurement data.

[0029] The ship dry cargo hold refrigeration system is optimized this time, and remarkable beneficial effects are obtained. Considering that the central air conditioning system for the crew has been designed on the ship, and the system has certain surplus capacity, the optimization scheme ingeniously utilizes this feature, and only needs to increase 1 air conditioning pipe and 1 air conditioning air distributor, so as to realize the temperature regulation of the dry cargo hold and achieve the refrigeration effect; Compared with before optimization, this scheme saves one high-temperature cold air machine, one set of electromagnetic valve expansion valve group and a plurality of copper pipes, greatly reduces the procurement cost and installation cost of the equipment. At the same time, since the dry cargo hold is supplied by the branch pipe of the central air conditioning system, the required air volume and refrigerating capacity are no longer included in the capacity of the central air conditioning system. This means that the central air conditioning system does not need to increase the load to meet the refrigeration demand of the dry cargo hold, effectively avoiding the problem of jumping caused by excessive load, reducing the maintenance cost and equipment replacement cost caused by equipment failure, and improving the stability and reliability of the system; In terms of energy consumption, the optimized scheme has obvious advantages. It fully utilizes the surplus capacity of the central air conditioning system to refrigerate the dry cargo hold, without additional power consumption. During the voyage of the ship, no additional power is needed for the refrigeration function of the dry cargo hold, thereby reducing the fuel consumption of the ship. This not only reduces the operating cost, but also meets the environmental protection requirements, and reduces the impact of ship operation on the environment; From the maintenance point of view, after reducing a large number of refrigeration equipment, the maintenance workload of the ship is greatly reduced. The maintenance personnel do not need to frequently check, maintain and maintain the high-temperature cold air machine, electromagnetic valve expansion valve group and other equipment, saving maintenance time and labor cost, and further reducing the maintenance cost of the ship; In summary, the optimization scheme of the ship dry cargo hold refrigeration system this time, by reasonably utilizing the surplus resources of the central air conditioning system, has achieved remarkable results in reducing equipment cost, energy consumption and maintenance cost, effectively improving the economic benefit and market competitiveness of the ship, and bringing real benefits to the ship owner.

[0030] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

Claims

1. An energy-saving system for refrigerating dry cargo in a ship's dry cargo warehouse, characterized in that, include: Central air conditioning surplus air utilization module, used to obtain surplus air from the ship's central air conditioning system; The duct delivery module is connected to the central air conditioning surplus air utilization module and is used to deliver the acquired surplus air to the dry goods warehouse. The air distribution adjustment module is connected to the air duct conveying module and is used to adjust the air volume and direction entering the dry goods warehouse; The temperature monitoring and control module is connected to the air distribution adjustment module and the temperature sensor installed in the dry goods warehouse, respectively. Based on the temperature information of the dry goods warehouse fed back by the temperature sensor, the air distribution adjustment module is controlled to adjust the air supply volume to maintain the set temperature range of the dry goods warehouse. A safety protection module, connected to the air duct delivery module, is used to monitor the air pressure inside the air duct and take protective measures when the air pressure exceeds a set value. The energy management module is connected to the central air conditioning surplus air utilization module and the air distribution adjustment module, and is used to monitor the system energy consumption and optimize energy use according to preset strategies. The intelligent early warning module is connected to key equipment and environmental sensors in the system to monitor equipment status and environmental parameters and issue early warnings when abnormalities occur. The cargo information management module is connected to the temperature monitoring and control module and is used to collect and manage cargo information and assist in adjusting the temperature of the dry goods warehouse according to cargo storage requirements.

2. The energy-saving system for refrigerated dry cargo storage on ships according to claim 1, characterized in that: The central air conditioning surplus air utilization module and the duct delivery module are connected by flanges or sockets. When the diameter of the air intake and the new air conditioning duct is greater than 300mm, a flange connection is used. Flanges of the same material as the duct and with sufficient strength and sealing are installed at the air intake and the end of the duct. A 3-5mm thick rubber gasket is placed between the flanges, and bolts conforming to design requirements are tightened evenly. When the diameter is less than 300mm, a socket connection is used. One end of the new air conditioning duct is inserted into the socket of the air intake, with an insertion depth of not less than 1.5 times the duct diameter. A sealant with good adhesion and weather resistance is applied to the socket, and then it is securely fixed with clamps or wire.

3. The energy-saving system for refrigerated dry cargo storage on ships according to claim 1, characterized in that: The air duct delivery module and the air distribution adjustment module are connected by threads or clamps. If the air inlet of the air distributor and the end of the air conditioning duct have threaded interfaces, a threaded connection is used. After wrapping 3-5 turns of Teflon tape in the same direction as the thread tightening at the end of the duct, tighten the air inlet of the air distributor to the end of the duct, and use a suitable wrench to avoid excessive force that could damage the threads. For air distributors and ducts without threaded interfaces, a clamp connection is used. First, align the air inlet of the air distributor with the end of the air conditioning duct, and then put a clamp that matches the diameter of the duct on the connection point. Tighten the clamp with a tool to ensure a tight connection without air leakage.

4. The energy-saving system for refrigerated dry cargo storage on ships according to claim 1, characterized in that: The temperature monitoring and control module includes a temperature controller, which is connected to multiple temperature sensors installed in the dry goods warehouse via shielded signal lines to receive temperature information from different locations within the warehouse. The temperature controller is also connected to the airflow regulating valve control circuit of the central air conditioning system or the airflow regulating controller of the air distributor. When the temperature inside the warehouse is higher than the set upper limit, it sends an increase airflow signal to open the airflow regulating valve or increase the opening of the air distributor vents. When the temperature inside the warehouse is lower than the set lower limit, it sends a decrease airflow signal to close the airflow regulating valve or decrease the opening of the air distributor vents.

5. The energy-saving system for refrigerated dry cargo storage on ships according to claim 1, characterized in that: The safety protection module includes a wind pressure sensor and an overload protection relay. The wind pressure sensor is installed on the air supply path of the air conditioning duct to monitor the wind pressure in the duct and transmit the signal to the overload protection relay. The overload protection relay compares the received wind pressure signal with a preset wind pressure upper limit. When the wind pressure in the duct exceeds the set value, the overload protection relay activates, cuts off the air supply or issues an alarm signal through the control circuit, and connects the signal to the ship's alarm system.

6. The energy-saving system for refrigerated dry cargo storage on ships according to claim 1, characterized in that: The energy management module includes energy monitoring equipment and a control strategy implementation unit. The energy monitoring equipment includes power monitoring instruments installed on the power supply lines of electrical equipment such as the central air conditioning system and air volume regulating devices, as well as cooling capacity metering devices installed on the air conditioning ducts, for real-time monitoring of parameters such as power consumption, current, voltage, and cooling capacity delivered to the dry cargo warehouse. The control strategy implementation unit is connected to the ship's centralized control system and temperature monitoring and control module through a communication network. Based on the collected energy data and the temperature requirements of the dry cargo warehouse, it formulates and implements energy control strategies, such as increasing the utilization of surplus air during periods of low electricity prices.

7. The energy-saving system for refrigerated dry cargo storage on ships according to claim 1, characterized in that: The intelligent early warning module includes equipment status sensors, environmental sensors, and an early warning analysis unit. The equipment status sensors are installed on key equipment such as the central air conditioning system, air volume regulating device, and air distributor to monitor equipment vibration, temperature, and other status parameters. The environmental sensors are installed in the dry cargo warehouse to monitor environmental parameters such as humidity and gas concentration. The early warning analysis unit analyzes the collected equipment status and environmental parameter data, uses a preset early warning model to determine whether there are any abnormalities, issues an early warning signal when an abnormality is detected, and connects the alarm signal to the ship's alarm system.

8. The energy-saving system for refrigerated dry cargo storage on ships according to claim 1, characterized in that: The cargo information management module includes cargo information collection equipment and an information processing unit. The cargo information collection equipment includes a barcode scanner installed at the entrance of the dry goods warehouse and a weight sensor installed in the cargo storage area, used to collect information such as the type, specifications, quantity, storage requirements, and weight changes of the cargo. The information processing unit transmits the collected cargo information to the temperature monitoring and control module, which automatically adjusts the temperature setpoint and airflow of the dry goods warehouse according to the storage requirements of the cargo. At the same time, the information processing unit records and manages the entry and exit of cargo, updates inventory information in real time, and issues early warnings based on the shelf life and storage conditions of the cargo.

9. An energy-saving system for refrigerated dry cargo storage on ships according to any one of claims 1, characterized in that: Also includes: The remote monitoring and operation module is connected to the ship's centralized control system via the ship's communication network. Ship crew members can view parameters such as temperature, air volume, equipment operating status, energy consumption, equipment warning information, and cargo inventory information in the dry cargo warehouse in real time through the remote monitoring and operation module from the bridge or other control center. They can also remotely operate the system according to cargo loading and unloading, changes in the navigation environment, or actual needs, such as adjusting temperature setpoints, changing air volume, modifying energy management parameters, and setting warning thresholds.

10. An energy-saving system for refrigerated dry cargo storage on ships according to any one of claims 1-9, characterized in that: Also includes: The system maintenance module includes a periodic cleaning unit, an equipment status inspection unit, and an equipment calibration unit. The periodic cleaning unit is used to regularly clean air conditioning ducts, air distributors, temperature sensors, energy monitoring equipment, and early warning sensors. The equipment status inspection unit is used by ship personnel to conduct daily inspections of the system and to perform comprehensive overhauls of the system at regular intervals. The equipment calibration unit is used to calibrate temperature controllers, energy monitoring equipment, and early warning sensors at regular intervals to ensure the normal operation of each module of the system and the accuracy of measurement data.

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