Marine air conditioner adopting R449A novel environment-friendly refrigerant

Abstract

The invention discloses a marine air conditioner adopting an R449A novel environment-friendly refrigerant, relates to the technical field of marine air conditioners, and comprises the marine air conditioner adopting the R449A novel environment-friendly refrigerant. The marine air conditioner comprises a compressor, a condenser, an interchangeable drying filter, a valve, a pressure switch, an energy adjusting device, an intelligent monitoring module, an electrical control unit and a tail end air processing unit, and has multiple protection functions of high pressure, low pressure, oil pressure and overload. A plurality of independent heat exchange spaces are formed in the shell of the device, so that when the outer wall of one heat exchange assembly is attached by dirt, and the heat exchange effect is reduced or damaged, a worker seals the corresponding heat exchange space and the corresponding heat exchange assembly through a knob assembly and a connecting assembly; therefore, the heat exchanger can be maintained without stopping the whole heat exchanger.

Description

Technical Field

[0001] This invention relates to the technical field of marine air conditioning, and in particular to a marine air conditioning system using a new type of environmentally friendly refrigerant, R449A. Background Technology

[0002] Existing marine heat exchangers (such as shell-and-tube condensers) typically rely on seawater or river water as the cooling medium for heat exchange. In practical applications, natural water sources generally contain calcium and magnesium ions, silt, and microorganisms, which easily lead to the formation of scale, biological slime, and other deposits on the inner wall of the heat exchange tubes after long-term operation.

[0003] The thermal resistance of this type of fouling is much higher than that of metal tube walls, significantly deteriorating heat transfer efficiency and leading to increased condensing pressure, reduced cooling capacity, and increased main unit energy consumption. More critically, existing heat exchangers mostly employ a fixed tube sheet structure, expanding or welding dozens or even hundreds of heat exchange tubes to the tube sheets at both ends. In this integrated structure, if a heat exchange tube fails due to localized corrosion or severe scaling, it cannot be replaced individually or cleaned while the system remains operational. Operators must shut down the machine, drain the refrigerant, remove the end caps, and perform chemical cleaning or replace the entire unit. This not only results in high maintenance costs but also forces ships to suspend operations, impacting operational economy and reliability. Summary of the Invention

[0004] The purpose of this invention is to provide a marine air conditioner using a new type of environmentally friendly refrigerant, R449A, in order to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a marine air conditioner using R449A, a new type of environmentally friendly refrigerant, wherein the marine air conditioner includes a compressor, a condenser, an interchangeable dryer filter, valves and pressure switches, an energy regulating device, an intelligent monitoring module, an electrical control unit, and a terminal air handling unit, and has multiple protection functions for high pressure, low pressure, oil pressure, and overload.

[0006] The condenser includes a housing, one end of which is equipped with a liquid inlet assembly for conveying condensate. The liquid inlet assembly is connected to a connecting assembly via a control assembly. Multiple heat exchange assemblies are inserted into the outer wall of the connecting assembly. A knob assembly is provided at the other end of the heat exchange assemblies. An installation assembly is installed at the end of the housing away from the liquid inlet assembly, and the knob assembly is installed inside the installation assembly.

[0007] In practical applications, the device has multiple independent heat exchange spaces inside its housing. When the outer wall of one of the heat exchange components becomes dirty, reducing the heat exchange effect or causing damage, the operator can seal the corresponding heat exchange space and heat exchange component using the knob assembly and connecting assembly, thus enabling maintenance without stopping the entire heat exchanger.

[0008] Furthermore, the housing includes a first cylinder, with a first sealing cap and a second sealing cap fixedly installed at both ends of the first cylinder, and a second drain pipe installed at the lower end of the first and second sealing caps. A valve is installed inside the second drain pipe. A sealing partition is fixedly installed inside the first cylinder. A water inlet pipe connected to the connecting assembly is installed at one end of the first cylinder, and a water outlet pipe and a liquid outlet pipe connected to the installation assembly are installed at the other end of the first cylinder. A sealing cavity for use with the water inlet pipe, water outlet pipe, and liquid outlet pipe is installed inside the first cylinder. A guide rod for use with the heat exchange assembly is installed between the connecting assembly and the installation assembly. The heat exchange assembly is inserted into the connecting assembly by the guidance of the guide rod. The positions of the water inlet pipe, water outlet pipe, and liquid outlet pipe can be adjusted as needed.

[0009] In practical applications, this device is equipped with a first sealing cover and a second sealing cover, which seals the connecting components and the mounting components as a whole, thereby improving the overall sealing performance and preventing water leakage.

[0010] Water inlet pipe: Cooling water inlet (connected to seawater pump), it is connected to the seawater pump on the ship and is responsible for pumping low-temperature seawater into the condenser;

[0011] Water outlet pipe: Cooling water outlet (connected to drain pipe), where heated seawater that has absorbed heat collects and is discharged from the condenser, eventually flowing back into the sea;

[0012] Liquid outlet pipe: Refrigerant outlet (connected to downstream components). After the high-temperature gas exchanges heat with the heat exchange tubes inside the shell, it condenses into a high-temperature and high-pressure liquid refrigerant, which flows out from here, ready to go to the liquid receiver or directly to the expansion valve.

[0013] Furthermore, the connecting assembly includes a hollow mounting plate, with multiple sets of seals rotatably mounted on one end of the mounting plate. The mounting plate, in conjunction with the seals, is equipped with multiple first drain pipes, each with a valve at its end. A sealing cylinder, used in conjunction with the seals, is fixedly installed inside the mounting plate. The seals include a rotating cylinder that mates with the sealing cylinder. A second cylinder is fixedly installed at the center of the rotating cylinder. A first baffle is fixedly installed inside the second cylinder. A second sealing ring is fixedly installed at the end of the second cylinder furthest from the second cylinder. Multiple through holes are evenly distributed in a ring at the center of the second sealing ring. Air holes, in conjunction with the through holes, are opened on the outer wall of the mounting plate. A second spring is installed inside the seals.

[0014] The liquid inlet assembly includes a main pipe, one end of which is connected to a refrigerant inlet, and the other end of which is connected to multiple branch pipes. The control assembly is installed at the end of each branch pipe. The control assembly includes a fixed cylinder that is fixedly connected to the branch pipe. A second baffle that works in conjunction with the first baffle is fixedly installed inside the fixed cylinder.

[0015] In practical applications, when a heat exchange component needs to be disassembled, the operator first opens the first sealing cover, which moves along the liquid inlet component. Then, the first baffle is rotated, and graduations are engraved on the outer walls of the rotating cylinder and the mounting plate to clarify the positional relationship between the first and second baffles. This ensures that the first and second baffles form a complete circle when they come together, with the through holes and vents misaligned. A hose is then connected to the outlet of the first drain pipe, which is connected to the storage tank. The valve at the end of the first drain pipe is then opened, allowing water in the corresponding independent heat exchange space to flow out slowly. After the water is drained, the operator rotates the knob assembly to detach it from the mounting component. The heat exchange component then pops out under the action of the second spring, allowing the operator to remove the heat exchange component and easily clean its surface.

[0016] Furthermore, the knob assembly includes a locking member, a slider, and a sealing block. An opening is provided on one side of the locking member, and fixing blocks that cooperate with the slider are symmetrically arranged on the outer wall of the locking member. A connecting groove is provided in the middle of the opening.

[0017] The mounting assembly includes an outer layer and an inner layer. The outer wall of the outer layer has a mounting groove for use with a knob assembly. The side wall of the mounting groove has a sliding groove for use with a slider. The middle of the mounting groove has a first receiving groove for use with a heat exchange assembly. The inner layer has a first cavity communicating with a liquid outlet pipe. The inner layer has a second receiving groove. One side of the inner layer is connected to the second cavity of the outer layer. The second cavity has a plurality of first water inlets and a first sealing ring for use with them, evenly distributed at the position of the second receiving groove. A return spring is installed on one side of the first sealing ring. The inner layer has a connecting hole for communicating with the second cavity. One side of the connecting hole has a connecting cavity for use with an opening.

[0018] In practical applications, when it is necessary to open the knob assembly, the operator first opens the second sealing cover, then rotates the corresponding knob assembly. The fixing block then moves the slider, which in turn moves the sealing block, thus moving the sealing block to the middle of the connecting cavity, thereby separating them. Then the knob assembly is pulled outward, making it convenient for the operator to remove the heat exchange component.

[0019] Furthermore, the heat exchange assembly includes a spiral pipe, with connecting cylinders fixedly connected to both ends of the spiral pipe. A sealing assembly is installed inside the connecting cylinder, and a fixing rod is fixedly installed at the middle position between the two connecting cylinders. A turbulence plate is uniformly fixedly installed on the outer wall of the fixing rod, and the turbulence plate increases in size from the water inlet end to the water outlet end.

[0020] The sealing assembly includes a spring telescopic rod, a sealing plate is fixedly installed at the end of the spring telescopic rod, a round rod is fixedly installed at the edge of the sealing plate, the round rod is slidably installed with the connecting cylinder, and a second water inlet hole is opened at the middle position of the connecting cylinder to cooperate with the sealing plate;

[0021] In practical applications, the progressively larger turbulence plates continuously turbulent the seawater, thereby improving the heat exchange effect. At the same time, the spiral shape of the heat exchange tubes in the heat exchange components increases the tube path, further enhancing the heat exchange effect.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The device has multiple independent heat exchange spaces inside its housing. When the outer wall of one of the heat exchange components becomes dirty, reducing the heat exchange effect or causing damage, the operator can seal the corresponding heat exchange space and heat exchange component by using the knob assembly and the connecting assembly. This allows for maintenance without having to stop the entire heat exchanger from working.

[0024] When a heat exchange component needs to be disassembled, the operator first opens the first sealing cover, which moves along the liquid inlet component. Then, the first baffle is rotated, and graduations are engraved on the outer walls of the rotating cylinder and the mounting plate to clarify the positional relationship between the first and second baffles. This ensures that the first and second baffles form a complete circle when they come together, with the through holes and vents misaligned. A hose is then connected to the outlet of the first drain pipe, which is connected to the storage tank. The valve at the end of the first drain pipe is then opened, allowing water to slowly flow out of the corresponding independent heat exchange space. After the water has drained, the operator rotates the knob assembly to detach it from the mounting component. The heat exchange component then pops out under the action of the second spring, allowing the operator to remove the heat exchange component and easily clean its surface. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the heat exchanger structure proposed in this invention;

[0026] Figure 2 This is a schematic diagram of the shell structure proposed in this invention;

[0027] Figure 3 This is a schematic diagram of the interior of the housing proposed in this invention;

[0028] Figure 4 This is a schematic diagram of the knob assembly structure proposed in this invention;

[0029] Figure 5 This is a schematic diagram of the installation component structure proposed in this invention;

[0030] Figure 6 This is a schematic diagram of the connecting cavity structure proposed in this invention;

[0031] Figure 7 This is a schematic diagram of the connection component structure proposed in this invention;

[0032] Figure 8 This is a schematic diagram of the sealing cylinder structure proposed in this invention;

[0033] Figure 9 This is a schematic diagram of the sealing element structure proposed in this invention;

[0034] Figure 10 This is a schematic diagram of the sealing assembly structure proposed in this invention;

[0035] Figure 11 This is a schematic diagram of the heat exchange component structure proposed in this invention;

[0036] Figure 12 This is a schematic diagram of the sealing block structure proposed in this invention.

[0037] In the diagram: 1. Shell; 101. First sealing cover; 102. Second sealing cover; 103. Liquid outlet pipe; 104. Water outlet pipe; 105. Water inlet pipe; 106. Sealing partition; 107. First cylinder; 108. Guide rod; 109. Sealing cavity; 2. Liquid inlet assembly; 201. Main pipe; 202. Branch pipe; 3. Control assembly; 301. Fixed cylinder; 302. Second baffle; 4. Knob assembly; 401. Locking element; 4011. Opening; 402. Slider; 4012. Fixed block; 403. Sealing block; 5. Mounting assembly; 501. Outer layer; 5011. Mounting groove; 5012. First storage groove; 5013. Slide groove; 5014. First cavity; 5015. Connecting cavity; 5016. Connecting hole; 502 5021. Inner layer; 5022. Second cavity; 5023. Second storage groove; 5024. Return spring; 5025. First sealing ring; 5026. First water inlet hole; 601. Connecting assembly; 601. Mounting plate; 6012. Sealing cylinder; 6023. Air hole; 6024. Sealing element; 6025. Rotating cylinder; 6026. Second cylinder; 6027. First baffle; 6028. Second sealing ring; 6029. Through hole; 6020. First drain pipe; 6020. Second spring; 7021. Heat exchange assembly; 7022. Connecting cylinder; 7013. Second water inlet hole; 7024. Spiral pipe; 703. Fixed rod; 704. Baffle plate; 705. Sealing assembly; 7066. Spring telescopic rod; 7067. Sealing plate; 7068. Round rod. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0039] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] Reference Figure 1-12 A marine air conditioner using R449A, a new type of environmentally friendly refrigerant, includes a marine air conditioner using R449A, comprising a compressor, a condenser, an interchangeable dryer filter, valves and pressure switches, an energy regulating device, an intelligent monitoring module, an electrical control unit, and a terminal air handling unit, and has multiple protection functions including high pressure, low pressure, oil pressure, and overload.

[0041] The condenser includes a housing 1. One end of the housing 1 is equipped with a liquid inlet assembly 2 for conveying condensate. The liquid inlet assembly 2 is connected to a connection assembly 6 via a control assembly 3. Multiple heat exchange assemblies 7 are inserted into the outer wall of the connection assembly 6. A knob assembly 4 is provided at the other end of the heat exchange assembly 7. An installation assembly 5 is installed at the end of the housing 1 away from the liquid inlet assembly 2. The knob assembly 4 is installed inside the installation assembly 5.

[0042] In practical applications, the housing 1 of this device is equipped with multiple independent heat exchange spaces. When the outer wall of one of the heat exchange components 7 is covered with dirt, which reduces the heat exchange effect or causes damage, the operator can seal the corresponding heat exchange space and heat exchange component 7 by using the knob assembly 4 and the connecting assembly 6, so that maintenance can be carried out without stopping the entire heat exchanger.

[0043] Furthermore, the housing 1 includes a first cylinder 107, with a first sealing cover 101 and a second sealing cover 102 fixedly installed at both ends of the first cylinder 107, and a second drain pipe installed at the lower end of the first sealing cover 101 and the second sealing cover 102. A valve is installed inside the second drain pipe. A sealing partition 106 is fixedly installed inside the first cylinder 107. A water inlet pipe 105 connected to the connecting assembly 6 is installed at one end of the first cylinder 107, and a water outlet pipe 104 and a liquid outlet pipe 103 connected to the mounting assembly 5 are installed at the other end of the first cylinder 107. A sealing cavity 109 is installed inside the first cylinder 107 to cooperate with the water inlet pipe 105, the water outlet pipe 104 and the liquid outlet pipe 103. A guide rod 108 is installed between the connecting assembly 6 and the mounting assembly 5 to cooperate with the heat exchange assembly 7. The heat exchange assembly 7 is inserted into the connecting assembly 6 by the guidance of the guide rod 108. The positions of the water inlet pipe 105, the water outlet pipe 104 and the liquid outlet pipe 103 can be adjusted as needed.

[0044] In practical applications, this device is equipped with a first sealing cover 101 and a second sealing cover 102, thereby sealing the connecting component 6 and the mounting component 5 as a whole, thus improving the overall sealing performance and preventing water leakage.

[0045] Water inlet pipe 105: Cooling water inlet (connected to seawater pump), it is connected to the seawater pump on the ship and is responsible for pumping low-temperature seawater into the condenser;

[0046] Water outlet 104: Cooling water outlet (connected to drain pipe). The heated seawater that has absorbed heat collects here, is discharged from the condenser, and is eventually discharged back into the sea.

[0047] Liquid outlet pipe 103: Refrigerant liquid outlet (connected to downstream components). After the high-temperature gas exchanges heat with the heat exchange tube in the shell, it condenses into a high-temperature and high-pressure liquid refrigerant, which flows out from here, ready to go to the liquid receiver or directly to the expansion valve.

[0048] Furthermore, the connecting component 6 includes a hollow mounting plate 601. Multiple sets of seals 602 are rotatably mounted on one end of the mounting plate 601. Multiple first drain pipes 603 are provided on the mounting plate 601 in conjunction with the seals 602. Valves are installed at the ends of the first drain pipes 603. A sealing cylinder 6011 for use with the seals 602 is fixedly provided inside the mounting plate 601. The seals 602 include a rotating cylinder 6021 for use with the sealing cylinder 6011. A second cylinder 6022 is fixedly provided at the middle position of the rotating cylinder 6021. A first baffle 6023 is fixedly provided inside the second cylinder 6022. A second sealing ring 6024 is fixedly provided at the end of the second cylinder 6022 away from the second cylinder 6022. Multiple through holes 6025 are evenly distributed in a ring at the middle position of the second sealing ring 6024. An air hole 6012 for use with the through hole 6025 is opened on the outer wall of the mounting plate 601. A second spring 604 is installed inside the seals 602.

[0049] The liquid inlet assembly 2 includes a main pipe 201, one end of which is connected to the refrigerant inlet (connected to the compressor), and the other end of which is connected to multiple branch pipes 202. The control assembly 3 is installed at the end of each branch pipe 202. The control assembly 3 includes a fixed cylinder 301 fixedly connected to the branch pipe 202. A second baffle 302 that works in conjunction with the first baffle 6023 is fixedly installed inside the fixed cylinder 301.

[0050] In practical applications, when it is necessary to disassemble a heat exchange component 7, the operator first opens the first sealing cover 101, which moves along the liquid inlet component 2. Then, the first baffle 6023 is rotated, and scales can be engraved on the outer walls of the rotating cylinder 6021 and the mounting plate 601 to clarify the positional relationship between the first baffle 6023 and the second baffle 302, so that the first baffle 6023 and the second baffle 302 come together to form a complete circle. At the same time, the through hole 6025 and the air hole 6012 are misaligned. Then, a hose is connected to the water outlet of the first drain pipe 603, and the hose is connected to the storage tank. Then, the valve at the end of the first drain pipe 603 is opened, and the water in the corresponding independent heat exchange space slowly flows out. After draining, the operator turns the knob component 4 to disengage it from the mounting component 5. Then, the heat exchange component 7 pops out under the action of the second spring 604, thus removing the heat exchange component 7 and making it convenient for the operator to clean the surface of the heat exchange component 7.

[0051] Furthermore, the knob assembly 4 includes a locking member 401, a slider 402, and a sealing block 403. An opening 4011 is provided on one side of the locking member 401, and a fixing block 4012 for use with the slider 402 is symmetrically arranged on the outer wall of the locking member 401.

[0052] Mounting assembly 5 includes an outer layer 501 and an inner layer 502. The outer wall of the outer layer 501 has a mounting groove 5011 for use with the knob assembly 4. The side wall of the mounting groove 5011 has a sliding groove 5013 for use with the slider 402. A first receiving groove 5012 for use with the heat exchange assembly 7 is located in the middle of the mounting groove 5011. The outer layer 501 has a first cavity 5014 communicating with the liquid outlet pipe 103. The inner layer 502 has a second receiving groove 5022. A second cavity 5021 is provided on one side of the outer layer 501. A plurality of first water inlets 5025 and a first sealing ring 5024 are evenly provided inside the second cavity 5021 at the position of the second storage groove 5022. A return spring 5023 is installed on one side of the first sealing ring 5024. A connecting hole 5016 for communicating with the second cavity 5021 is provided inside the outer layer 501. A connecting cavity 5015 for cooperating with the opening 4011 is provided on one side of the connecting hole 5016.

[0053] In practical applications, when it is necessary to open the knob assembly 4, the operator first opens the second sealing cover 102, then rotates the corresponding knob assembly 4, and then the fixing block 4012 drives the slider 402 to move, the slider 402 drives the sealing block 403 to move, so that the sealing block 403 moves to the middle of the connecting cavity 5015, thereby separating them. Then the knob assembly 4 is pulled outward, so that the operator can easily take out the heat exchange assembly 7.

[0054] Furthermore, the heat exchange component 7 includes a spiral pipe 702, with connecting cylinders 701 fixedly connected to both ends of the spiral pipe 702. A sealing component 706 is installed inside the connecting cylinder 701. A fixing rod 703 is fixedly installed at the middle position between the two connecting cylinders 701. A baffle plate 704 is evenly fixedly installed on the outer wall of the fixing rod 703. The baffle plate 704 increases in size from the water inlet end to the water outlet end.

[0055] The sealing assembly 706 includes a spring telescopic rod 7061, a sealing plate 7062 is fixedly provided at the end of the spring telescopic rod 7061, a round rod 7063 is fixedly provided at the edge of the sealing plate 7062, the round rod 7063 is slidably provided with the connecting cylinder 701, and a second water inlet hole 7011 is provided in the middle position of the connecting cylinder 701 to cooperate with the sealing plate 7062.

[0056] In practical applications, as the turbulence plate (704) increases in size, it can continuously turbulent the seawater, thereby improving the heat exchange effect. At the same time, the heat exchange tube of the heat exchange component (7) is spiral, thereby increasing the path of the heat exchange tube and further improving the heat exchange effect.

[0057] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A marine air conditioner using R449A, a novel environmentally friendly refrigerant, characterized in that, This includes marine air conditioners that use the new environmentally friendly refrigerant R449A. The marine air conditioner includes a compressor, condenser, interchangeable dryer filter, valves and pressure switches, energy regulating device, intelligent monitoring module, electrical control unit, and terminal air handling unit, and has multiple protection functions for high pressure, low pressure, oil pressure, and overload. The condenser includes a housing (1), one end of which is equipped with a liquid inlet assembly (2) for conveying condensate. The liquid inlet assembly (2) is connected to a connecting assembly (6) via a control assembly (3). Multiple heat exchange assemblies (7) are inserted into the outer wall of the connecting assembly (6). A knob assembly (4) is provided at the other end of the heat exchange assembly (7). An installation assembly (5) is installed at the end of the housing (1) away from the liquid inlet assembly (2). The knob assembly (4) is installed inside the installation assembly (5).

2. A marine air conditioner using R449A, a novel environmentally friendly refrigerant, as described in claim 1, is characterized in that... The housing (1) includes a first cylinder (107), with a first sealing cap (101) and a second sealing cap (102) fixedly installed at both ends of the first cylinder (107). A sealing partition (106) is fixedly installed inside the first cylinder (107). A water inlet pipe (105) connected to the connecting assembly (6) is provided at one end of the first cylinder (107). A water outlet pipe (104) and a liquid outlet pipe (103) connected to the installation assembly (5) are provided at the other end of the first cylinder (107). A sealing cavity (109) for use with the water inlet pipe (105), the water outlet pipe (104) and the liquid outlet pipe (103) is installed inside the first cylinder (107). A guide rod (108) for use with the heat exchange assembly (7) is installed between the connecting assembly (6) and the installation assembly (5).

3. A marine air conditioner using R449A, a novel environmentally friendly refrigerant, as described in claim 2, is characterized in that... The connecting assembly (6) includes a hollow mounting plate (601). Multiple sets of seals (602) are rotatably mounted on one end of the mounting plate (601). Multiple first drain pipes (603) are provided on the mounting plate (601) in conjunction with the seals (602). A sealing cylinder (6011) for use with the seals (602) is fixedly disposed inside the mounting plate (601). The seals (602) include a rotating cylinder (6021) that cooperates with the sealing cylinder (6011). The rotating cylinder (6021) is fixedly positioned at its center. There is a second cylinder (6022), and a first baffle (6023) is fixedly installed inside the second cylinder (6022). A second sealing ring (6024) is fixedly installed at the end of the second cylinder (6022) away from the second cylinder (6022). A plurality of through holes (6025) are evenly distributed in a ring at the middle position of the second sealing ring (6024). The outer wall of the mounting plate (601) is provided with air holes (6012) that are used to cooperate with the through holes (6025). A second spring (604) is installed inside the sealing member (602).

4. A marine air conditioner using R449A, a novel environmentally friendly refrigerant, as described in claim 1, is characterized in that... The liquid inlet assembly (2) includes a main pipe (201), one end of which is connected to the refrigerant inlet, and the other end of which is connected to multiple branch pipes (202). The control assembly (3) is installed at the end of each branch pipe (202). The control assembly (3) includes a fixed cylinder (301) fixedly connected to the branch pipe (202). A second baffle (302) is fixedly installed inside the fixed cylinder (301) to cooperate with the first baffle (6023).

5. A marine air conditioner using R449A, a novel environmentally friendly refrigerant, as described in claim 1, is characterized in that... The knob assembly (4) includes a locking member (401), a slider (402) and a sealing block (403). An opening (4011) is provided on one side of the locking member (401), and a fixing block (4012) is symmetrically arranged on the outer wall of the locking member (401) to cooperate with the slider (402).

6. A marine air conditioner using R449A, a novel environmentally friendly refrigerant, as described in claim 1, is characterized in that... The mounting assembly (5) includes an outer layer (501) and an inner layer (502). The outer wall of the outer layer (501) has a mounting groove (5011) for use with the knob assembly (4). The side wall of the mounting groove (5011) has a sliding groove (5013) for use with the slider (402). The middle position of the mounting groove (5011) has a first storage groove (5012) for use with the heat exchange assembly (7). The interior of the outer layer (501) has a first cavity (5014) communicating with the liquid outlet pipe (103). The interior of the inner layer (502) has a second storage groove (5022). The inner layer (502) has a second cavity (5021) on one side that cooperates with the outer layer (501). The second cavity (5021) has a plurality of first water inlets (5025) and a first sealing ring (5024) that cooperates with them, evenly distributed in the position of the second storage groove (5022). A return spring (5023) is installed on one side of the first sealing ring (5024). The outer layer (501) has a connecting hole (5016) for connecting the second cavity (5021) inside. A connecting cavity (5015) that cooperates with the opening (4011) is opened on one side of the connecting hole (5016).

7. A marine air conditioner using R449A, a novel environmentally friendly refrigerant, as described in claim 1, is characterized in that... The heat exchange component (7) includes a spiral pipe (702), with connecting cylinders (701) fixedly connected to both ends of the spiral pipe (702). A sealing component (706) is installed inside the connecting cylinder (701). A fixing rod (703) is fixedly installed at the middle position between the two connecting cylinders (701). A baffle plate (704) is uniformly fixedly installed on the outer wall of the fixing rod (703). The baffle plate (704) increases in size from the water inlet end to the water outlet end.

8. A marine air conditioner using R449A, a novel environmentally friendly refrigerant, as described in claim 7, is characterized in that... The sealing assembly (706) includes a spring telescopic rod (7061), a sealing plate (7062) is fixedly provided at the end of the spring telescopic rod (7061), a round rod (7063) is fixedly provided at the edge of the sealing plate (7062), the round rod (7063) is slidably disposed with the connecting cylinder (701), and a second water inlet hole (7011) is provided in the middle position of the connecting cylinder (701) for use with the sealing plate (7062).

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