Marine cooling equipment and marine cooling system

Abstract

The application provides a ship cooling device and a ship cooling system, which comprise: an air conditioner refrigeration cycle device, a urea cooling device, a first urea cooling cycle pipeline and a urea cabin; the first urea cooling cycle pipeline is drawn from a main cooling cycle pipeline of the air conditioner refrigeration cycle device and connected to the urea cooling device; the urea cabin is connected to the urea cooling device; the urea cabin is used for storing urea solution; the air conditioner refrigeration cycle device is used for forming a refrigerant cycle to provide refrigerating capacity for the ship and the urea cooling device; and the urea cooling device is used for forming a urea refrigerant cycle through the first urea cooling cycle pipeline and the air conditioner refrigeration cycle device to cool the urea solution in the urea cabin. In this way, the urea cooling device and the air conditioner refrigeration cycle device are combined together to form the ship cooling device, so that the cooling of the ship and the urea cabin under extreme temperature and environment can be realized, and cost can be saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ship technology, in particular to a ship cooling device and a ship cooling system. BACKGROUND

[0002] The superstructure of a ship is located at the bow, which is beneficial to the view, steering, and is also beneficial to being away from the noise of the machinery space, and is widely used in various types of cargo ships. In order to meet the high-standard emission requirements, the generator set at the bow of the ship needs to use an SCR (Selective Catalytic Reduction) system for tail gas treatment, and urea solution needs to be used in the system (stored in a tank). The storage conditions of the solution should be controlled between 5-35℃, and the solution will deteriorate at high temperature and crystallize at low temperature.

[0003] The existing urea tank cooling system of a ship uses a seawater coil to cool the tank. The main defects of seawater cooling are: first, the pipeline is strongly corroded, the stainless steel pipe material used for seawater is special, and the inside and outside of the pipeline are two corrosive liquids, seawater and urea, so the pipeline material needs to consider a certain cost; second, under extreme environmental conditions, the seawater temperature can reach or be higher than 35℃, which cannot be used for cooling the urea tank. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a ship cooling device and a ship cooling system, which can cool the ship and the urea tank under extreme temperature and environmental conditions, thereby saving costs.

[0005] In a first aspect, an embodiment of the present application provides a ship cooling device, comprising: an air conditioning refrigeration cycle device, a urea cooling device, a first urea cooling circulation pipeline, and a urea tank; the first urea cooling circulation pipeline is drawn from the main cooling circulation pipeline of the air conditioning refrigeration cycle device and connected to the urea cooling device; the urea tank is connected to the urea cooling device; the urea tank is used to store urea solution; the air conditioning refrigeration cycle device is used to form a refrigerant circulation and provide refrigeration capacity for the ship and the urea cooling device; the urea cooling device is used to form a urea refrigerant circulation through the first urea cooling circulation pipeline with the aid of the air conditioning refrigeration cycle device, and to cool the urea solution in the urea tank.

[0006] Further, the air conditioning refrigeration cycle device comprises a compressor, and an air conditioning system evaporator and a condenser connected with the compressor respectively; wherein the air conditioning system evaporator and the condenser are connected through an expansion valve; the air conditioning system evaporator is further connected with an external fan coil; the compressor is used to extract gaseous first refrigerant from the air conditioning system evaporator, and press the first refrigerant into the condenser to generate high-pressure gaseous refrigerant; the high-pressure gaseous refrigerant is liquefied into high-pressure liquid refrigerant through the condenser; the high-pressure liquid refrigerant is throttled and depressurized into low-pressure liquid refrigerant through the expansion valve; the low-pressure liquid refrigerant is gasified to exchange heat in the air conditioning system evaporator; the air conditioning system evaporator blows cooled air into the cabin through the external fan coil.

[0007] Further, the urea cooling device comprises a urea system evaporator and a second urea cooling circulation pipeline; the urea system evaporator is connected with the compressor, the condenser and the expansion valve through the first urea cooling circulation pipeline to form a loop; wherein the urea system evaporator comprises a urea coil; the urea coil is connected with a urea cabin through the second urea cooling circulation pipeline to form a loop; the urea coil is used to transport urea solution in the urea cabin to the urea system evaporator for cooling through the second urea cooling circulation pipeline, and transport the cooled urea solution back to the urea cabin; the compressor is further used to extract gaseous second refrigerant from the urea system evaporator, and press the second refrigerant into the condenser to generate high-pressure gaseous refrigerant; the high-pressure refrigerant is liquefied into high-pressure liquid refrigerant when passing through the condenser; the high-pressure liquid refrigerant is throttled and depressurized into low-pressure liquid refrigerant through the expansion valve; the low-pressure liquid refrigerant is gasified to exchange heat in the urea system evaporator to cool the urea solution in the urea coil.

[0008] Further, the urea cooling device further comprises a urea delivery pump; the urea delivery pump is arranged on the second urea cooling circulation pipeline, and connected with the urea cabin and the urea coil respectively; the urea delivery pump is used to pump the urea solution in the urea cabin into the urea coil.

[0009] Further, the urea cooling device further comprises a temperature sensor; the temperature sensor is arranged at the outlet of the urea cabin; the temperature sensor is in communication connection with the urea delivery pump; the temperature sensor is used to measure the cooling temperature of the cooled urea solution; when the cooling temperature is lower than a preset minimum temperature, the temperature sensor sends a closing signal to the urea delivery pump to stop the urea delivery pump from pumping the urea solution into the evaporator.

[0010] Further, the urea cabin comprises an in-cabin temperature sensor; the in-cabin temperature sensor is in communication connection with the urea delivery pump; the in-cabin temperature sensor is used to measure the in-cabin temperature of the urea solution in the urea cabin; when the in-cabin temperature of the urea solution is greater than a preset maximum temperature, the in-cabin temperature sensor sends an opening signal to the urea delivery pump to make the urea delivery pump start to pump the urea solution into the evaporator.

[0011] Further, the urea cooling device further comprises a first pressure gauge and a second pressure gauge; the first pressure gauge and the second pressure gauge are respectively arranged at two ends of the urea delivery pump; the first pressure gauge and the second pressure gauge are used for measuring pressure values at the two ends of the urea delivery pump, so as to judge the working state of the urea delivery pump according to the pressure values.

[0012] Further, the air conditioner refrigeration cycle device further comprises an air conditioner pressure control unit; the air conditioner pressure control unit is connected with the compressor; the air conditioner pressure control unit is used for monitoring the pressure of the compressor, and judging the working state of the compressor according to the pressure of the compressor.

[0013] In the second aspect, the embodiment of the present application provides a ship cooling system, comprising the ship cooling device and a fan coil; the fan coil is used for delivering air cooled by the ship cooling system to the whole ship.

[0014] Further, the system further comprises a remote control device; the remote control device is in communication connection with the ship cooling device; the remote control device is used for remotely controlling the ship cooling device.

[0015] The embodiment of the present application provides a ship cooling device and a ship cooling system, comprising: an air conditioner refrigeration cycle device, a urea cooling device, a first urea cooling circulation pipeline and a urea cabin; the first urea cooling circulation pipeline is led out from a main cooling circulation pipeline of the air conditioner refrigeration cycle device and connected to the urea cooling device; the urea cabin is connected with the urea cooling device; the urea cabin is used for storing urea solution; the air conditioner refrigeration cycle device is used for forming a refrigerant circulation to provide refrigeration capacity for the ship and the urea cooling device; the urea cooling device is used for forming a urea refrigerant circulation through the first urea cooling circulation pipeline by means of the air conditioner refrigeration cycle device to cool the urea solution in the urea cabin. In this mode, the urea cooling device and the air conditioner refrigeration cycle device are combined together to form the ship cooling device, the existing equipment is used to cool the urea solution, the modification is simple, the cooling of the ship and the urea cabin in extreme temperature and environment can be realized, thereby reducing the workload on the ship, the equipment maintenance is simpler, and the cost is saved.

[0016] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application will be realized and achieved by the structure particularly pointed out in the description, the claims and the drawings.

[0017] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are shown as follows. BRIEF DESCRIPTION OF DRAWINGS

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a ship cooling device provided in Embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of another ship cooling device provided in Embodiment 1 of the present invention;

[0021] Figure 3 This is a schematic diagram of a ship cooling system provided in Embodiment 2 of the present invention.

[0022] Icons: 1-Air conditioning refrigeration cycle unit; 2-Urea cooling unit; 3-First urea cooling circulation pipeline; 4-Urea tank; 5-Fan coil unit; 6-Ship cooling equipment; 7-Remote control device. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] To facilitate understanding of this embodiment, the embodiments of the present invention will be described in detail below.

[0025] Example 1:

[0026] Figure 1 This is a schematic diagram of a ship cooling device provided in Embodiment 1 of the present invention.

[0027] Reference Figure 1 The ship's cooling equipment includes an air conditioning refrigeration cycle unit 1, a urea cooling unit 2, a first urea cooling circulation pipeline 3, and a urea tank 4; the first urea cooling circulation pipeline 3 is led out from the main cooling circulation pipeline of the air conditioning refrigeration cycle unit 1 and connected to the urea cooling unit 2; the urea tank 4 is connected to the urea cooling unit 2.

[0028] Urea tank, used to store urea solution.

[0029] Here, the temperature in the range of 20-25℃ is more ideal according to the storage environment required by urea, and this temperature range is close to the cabin temperature served by the marine air conditioner. Therefore, if the cooling of the urea cabin is connected with the air conditioner refrigeration cycle device, the integration and simplification of the system can be achieved.

[0030] The air conditioner refrigeration cycle device is used to form a refrigerant cycle to provide refrigeration capacity for the marine vessel and the urea cooling device.

[0031] The urea cooling device is used to form a urea refrigerant cycle by the first urea cooling circulation pipeline and the air conditioner refrigeration cycle device to cool the urea solution in the urea cabin.

[0032] Here, the refrigerant cycle required by the urea cooling device can use the air conditioner refrigeration cycle device. Only the cooling capacity required by the urea cooling device needs to be added to the air conditioner refrigeration cycle device, and after reasonable calculation and selection, the cooling coil device in the cabin can be omitted.

[0033] In an embodiment, referring to Figure 2 , the air conditioner refrigeration cycle device comprises a compressor, and an air conditioner system evaporator and a condenser connected with the compressor respectively; wherein the air conditioner system evaporator and the condenser are connected through an expansion valve; and the air conditioner system evaporator is further connected with an external fan coil.

[0034] The compressor is used to extract the gaseous first refrigerant from the air conditioner system evaporator, and press the first refrigerant into the condenser to generate high-pressure gaseous refrigerant. The high-pressure gaseous refrigerant is liquefied into high-pressure liquid refrigerant through the condenser. The high-pressure liquid refrigerant is throttled and depressurized into low-pressure liquid refrigerant through the expansion valve. The low-pressure liquid refrigerant is gasified through the air conditioner system evaporator to exchange heat. The air conditioner system evaporator blows the cooled air into the cabin through the external fan coil.

[0035] Here, to prevent the problem of urea crystallization in the heat exchanger caused by too low inlet temperature of the refrigerant, it is suggested to adjust the outlet temperature of the refrigerant to 5-6℃ when designing the air conditioner system, which has little effect on the refrigeration capacity of the whole system.

[0036] In an embodiment, referring to Figure 2 , the urea cooling device comprises a urea system evaporator and a second urea cooling circulation pipeline; the urea system evaporator is connected with the compressor, the condenser and the expansion valve through the first urea cooling circulation pipeline to form a loop; wherein the urea system evaporator comprises a urea coil; and the urea coil is connected with the urea cabin through the second urea cooling circulation pipeline to form a loop.

[0037] A urea coil for transporting urea solution in a urea tank to a urea system evaporator through a second urea cooling circulation pipeline for cooling, and transporting the cooled urea solution back to the urea tank.

[0038] The compressor is also used for extracting gaseous second refrigerant from the urea system evaporator, and pressurizing the second refrigerant into the condenser to generate high-pressure gaseous refrigerant, which is liquefied into high-pressure liquid refrigerant when passing through the condenser, and the high-pressure liquid refrigerant is throttled and depressurized into low-pressure liquid refrigerant by the expansion valve, and the low-pressure liquid refrigerant is vaporized in the urea system evaporator to exchange heat to cool the urea solution in the urea coil.

[0039] Specifically, the designed urea tank has a capacity of 3m 3 According to the calculation, the required cooling capacity is about 25.5kW (40% urea solution density 1.1t / m 3 Specific heat 2.09kJ / kgK, according to the urea pump 2m 3 / h, calculated from 35℃ to 15℃). The design parameters of the air conditioning refrigeration cycle device are: compressor refrigeration capacity 205kW, refrigerant R404A, evaporation temperature 4.6℃, condensation temperature 47℃.

[0040] The urea system evaporator of the urea cooling device is selected to be completely matched with the air conditioning refrigeration cycle device, and an independent urea system evaporator unit is provided for cooling considering that urea itself has a little toxicity and irritating gas. The urea cooling capacity accounts for about 1 / 8 of the air conditioning cooling capacity. According to the actual selection and matching, the construction cost is basically not additionally increased under the condition that the compressor does not skip gears, and it is more economical.

[0041] In an embodiment, referring to Figure 2 The urea cooling device further comprises a urea delivery pump; the urea delivery pump is arranged on the second urea cooling circulation pipeline and connected with the urea tank and the urea coil respectively.

[0042] The urea delivery pump is used for pumping the urea solution in the urea tank into the urea coil.

[0043] In an embodiment, referring to Figure 2 The urea cooling device further comprises a temperature sensor TS1; the temperature sensor is arranged at the outlet of the urea system evaporator; and the temperature sensor is in communication connection with the urea delivery pump.

[0044] The temperature sensor is used for measuring the cooling temperature of the cooled urea solution, and when the cooling temperature is lower than a preset minimum temperature, the temperature sensor sends a closing signal to the urea delivery pump to stop the urea delivery pump from pumping the urea solution into the evaporator.

[0045] Here, the preset minimum temperature can be set according to actual conditions, and the proper storage environment of urea is generally 5-35°C, and the preset minimum temperature should not be higher than 5°C. Too low temperature is easy to freeze at the evaporator port of the urea system.

[0046] In an embodiment, referring to Figure 2 , the urea tank comprises a tank temperature sensor TS2; the tank temperature sensor is in communication connection with the urea delivery pump.

[0047] The tank temperature sensor is used to measure the tank temperature of the urea solution in the urea tank, and when the tank temperature of the urea solution is greater than the preset maximum temperature, the tank temperature sensor sends an opening signal to the urea delivery pump to make the urea delivery pump start to pump the urea solution into the evaporator.

[0048] Here, the preset maximum temperature can be set according to actual conditions, and the proper storage environment of urea is generally 5-35°C, and the preset maximum temperature should not be higher than 35°C.

[0049] In an embodiment, referring to Figure 2 , the urea cooling device further comprises a first pressure gauge PI1 and a second pressure gauge PI2; the first pressure gauge and the second pressure gauge are respectively arranged at both ends of the urea delivery pump.

[0050] The first pressure gauge and the second pressure gauge are used to measure the pressure values at both ends of the urea delivery pump to judge the working state of the urea delivery pump according to the pressure values.

[0051] Here, when the pressure difference between the first pressure gauge and the second pressure gauge is within the preset discharge pressure range of the urea delivery pump, the urea delivery pump works normally; when the pressure difference between the first pressure gauge and the second pressure gauge is higher or lower than the preset discharge pressure range, the urea delivery pump fails. When the urea delivery pump fails, stop working.

[0052] In an embodiment, the air conditioning refrigeration cycle device further comprises an air conditioning pressure control unit; the air conditioning pressure control unit is connected with the compressor.

[0053] The air conditioning pressure control unit is used to monitor the compressor pressure and judge the working state of the compressor according to the compressor pressure.

[0054] Here, referring to Figure 2 , the air conditioning pressure control unit comprises a plurality of pressure gauges PI and pressure switches PS, the working pressure of the compressor is detected by the plurality of pressure gauges, and when the compressor has a problem, the opening or closing of the corresponding pipeline is controlled by the pressure switch.

[0055] The embodiment of the present application provides a ship cooling equipment, which comprises: an air conditioner refrigeration circulating device, a urea cooling device, a first urea cooling circulating pipeline and a urea cabin; the first urea cooling circulating pipeline is led out from a main cooling circulating pipeline of the air conditioner refrigeration circulating device and connected to the urea cooling device; the urea cabin is connected to the urea cooling device; the urea cabin is used for storing urea solution; the air conditioner refrigeration circulating device is used for forming a refrigerant cycle and providing refrigerating capacity for the ship and the urea cooling device; and the urea cooling device is used for forming a urea refrigerant cycle by means of the air conditioner refrigeration circulating device through the first urea cooling circulating pipeline and cooling the urea solution in the urea cabin. In this mode, the urea cooling device and the air conditioner refrigeration circulating device are combined together to form the ship cooling equipment, the existing equipment is used to cool the urea solution, the modification is simple, the cooling of the ship and the urea cabin can be realized in an extreme temperature and environment, thereby reducing the workload of the ship construction, the equipment maintenance is simpler, and the cost is saved.

[0056] Embodiment two

[0057] Figure 3 The ship cooling system provided in the embodiment two of the present application is shown in the figure.

[0058] Referring to Figure 3 , the ship cooling system comprises a fan coil 5 and the ship cooling equipment 6; the fan coil 5 is used for delivering air cooled by the ship cooling system to the whole ship.

[0059] In an embodiment, referring to Figure 3 , the system further comprises a remote control device 7, the remote control device 7 is in communication connection with the ship cooling equipment 6; and the remote control device 7 is used for remotely controlling the ship cooling equipment 6.

[0060] Here, the crew can remotely control the opening and closing of the air conditioner refrigeration circulating device and the urea cooling device through the remote monitoring device, so that the real-time control of the ship cooling equipment is realized, and the safety of the crew and the stability of the ship operation are ensured.

[0061] The embodiment of the present application provides a ship cooling system, which comprises: an air conditioner refrigeration cycle device, a urea cooling device, a first urea cooling cycle pipeline and a urea cabin; the first urea cooling cycle pipeline is drawn from a main cooling cycle pipeline of the air conditioner refrigeration cycle device and connected to the urea cooling device; the urea cabin is connected to the urea cooling device; the urea cabin is used for storing urea solution; the air conditioner refrigeration cycle device is used for forming a refrigerant cycle and providing refrigerating capacity for the ship and the urea cooling device; and the urea cooling device is used for forming a urea refrigerant cycle by means of the air conditioner refrigeration cycle device through the first urea cooling cycle pipeline and cooling the urea solution in the urea cabin. In this mode, the urea cooling device and the air conditioner refrigeration cycle device are combined together to form a ship cooling device, so that remote cooling of the ship and the urea cabin can be realized under extreme temperature and environment, thereby reducing the workload of the ship and saving the cost.

[0062] The computer program product provided by the embodiment of the present application comprises a computer readable storage medium storing program codes, and the program codes comprise instructions for executing the method described in the foregoing method embodiments.

[0063] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the foregoing method embodiments, and will not be described here.

[0064] In addition, in the description of the embodiment of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0065] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the parts of the present application that essentially contribute to the prior art or the parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the various embodiments of the present application. The aforementioned storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0066] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0067] Finally, it should be noted that: the above-described embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, and are not limited thereto, the protection scope of the present application is not limited thereto, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art within the technical range disclosed by the present application can modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A marine cooling apparatus, characterized by, The air conditioning refrigeration cycle device, the urea cooling device, the first urea cooling circulation pipeline and the urea tank are connected. The urea tank is connected with the urea cooling device. The urea tank is used for storing urea solution. The air conditioning refrigeration cycle device is used for forming a refrigerant cycle to provide refrigeration capacity for the ship and the urea cooling device. The urea cooling device is used for forming a urea refrigerant cycle through the first urea cooling circulation pipeline by means of the air conditioning refrigeration cycle device to cool the urea solution in the urea tank. The air conditioning refrigeration cycle device comprises a compressor, an air conditioning system evaporator and a condenser connected with the compressor respectively, wherein the air conditioning system evaporator and the condenser are connected through an expansion valve, and the air conditioning system evaporator is further connected with an external fan coil. The compressor is used for extracting gaseous first refrigerant from the air conditioning system evaporator and pressurizing the first refrigerant into the condenser to generate high-pressure gaseous refrigerant, the high-pressure gaseous refrigerant is liquefied into high-pressure liquid refrigerant through the condenser, the high-pressure liquid refrigerant is depressurized into low-pressure liquid refrigerant through the expansion valve, and the low-pressure liquid refrigerant is gasified to exchange heat through the air conditioning system evaporator, and the air conditioning system evaporator blows cooled air into the cabin through the external fan coil. The urea cooling device comprises a urea system evaporator and a second urea cooling circulation pipeline, the urea system evaporator is connected with the compressor, the condenser and the expansion valve through the first urea cooling circulation pipeline to form a loop, wherein the urea system evaporator comprises a urea coil, and the urea coil is connected with the urea tank through the second urea cooling circulation pipeline to form a loop. The urea coil is used for transporting the urea solution in the urea tank to the urea system evaporator through the second urea cooling circulation pipeline for cooling, and transporting the cooled urea solution back to the urea tank. The compressor is further used for extracting gaseous second refrigerant from the urea system evaporator and pressurizing the second refrigerant into the condenser to generate high-pressure gaseous refrigerant, the high-pressure gaseous refrigerant is liquefied into high-pressure liquid refrigerant through the condenser, the high-pressure liquid refrigerant is depressurized into low-pressure liquid refrigerant through the expansion valve, and the low-pressure liquid refrigerant is gasified to exchange heat in the urea system evaporator to cool the urea solution in the urea coil. The air conditioning refrigeration cycle device further comprises an air conditioning pressure control unit connected with the compressor. The air conditioning pressure control unit is used for monitoring the compressor pressure and judging the working state of the compressor according to the compressor pressure. The urea cooling device further comprises a urea delivery pump arranged on the second urea cooling circulation pipeline and connected with the urea tank and the urea coil respectively.

2. The apparatus of claim 1, wherein, ​ The urea delivery pump is used to pump the urea solution in the urea tank into the urea coil.

3. The apparatus of claim 2, wherein, The urea cooling device further comprises a temperature sensor; the temperature sensor is arranged at the outlet of the urea tank; the temperature sensor is in communication connection with the urea delivery pump; The temperature sensor is used to measure the cooling temperature of the cooled urea solution; when the cooling temperature is lower than the preset minimum temperature, the temperature sensor sends a closing signal to the urea delivery pump to stop the urea delivery pump from pumping the urea solution into the urea system evaporator.

4. The apparatus of claim 3, wherein, The urea tank comprises a tank temperature sensor; the tank temperature sensor is in communication connection with the urea delivery pump; The tank temperature sensor is used to measure the tank temperature of the urea solution in the urea tank; when the tank temperature of the urea solution is greater than the preset maximum temperature, the tank temperature sensor sends an opening signal to the urea delivery pump to start the urea delivery pump to pump the urea solution into the evaporator.

5. The apparatus of claim 4, wherein, The urea cooling device further comprises a first pressure gauge and a second pressure gauge; the first pressure gauge and the second pressure gauge are arranged at the two ends of the urea delivery pump respectively; The first pressure gauge and the second pressure gauge are used to measure the pressure values at the two ends of the urea delivery pump to determine the working state of the urea delivery pump according to the pressure values.

6. A marine cooling system characterised in that, The system further comprises a remote control device; the remote control device is in communication connection with the ship cooling equipment; the remote control device is used to remotely control the ship cooling equipment.

7. The system of claim 6, wherein, The system further comprises a remote control device; the remote control device is in communication connection with the ship cooling equipment; the remote control device is used to remotely control the ship cooling equipment.

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