A marine positive pressure explosion-proof air conditioning unit

Abstract

This utility model relates to a marine positive pressure explosion-proof air conditioning device. The air conditioning unit is divided into a lower unit, an upper left unit, and an upper right unit. A cooling air inlet is located on the left side of the lower unit, and a cooling air outlet is located on the front or rear side of the lower unit. A condenser, a compressor, and a cooling fan are arranged sequentially between the cooling air inlet and outlet. A blower is located inside the upper left unit, and an air outlet is located on the rear side of the upper left unit. The air outlet supplies air to the cabin via an air supply duct. The upper right unit is connected to the upper left unit via an evaporator. A return air outlet and a fresh air outlet are located on the right side of the upper right unit. The return air outlet is connected to a return air duct with a return air pressure sensor and a return air fan. The fresh air outlet is connected to a fresh air duct with a fresh air sensor and a fresh air fan. An explosion-proof electrical control box is externally connected to a fresh air pressure sensor, a return air pressure sensor, a cabin air outlet supply air pressure sensor, a cabin door pressure sensor, and a cabin remote pressure sensor. This device can stably and efficiently regulate positive pressure protection and has excellent explosion-proof performance.

Description

Technical Field

[0001] This utility model relates to an air conditioning device, specifically a marine positive pressure explosion-proof air conditioning device. Background Technology

[0002] In environments where flammable and explosive materials may exist, ensuring the safety of these compartments requires not only protecting the internal components from explosions but also maintaining a constant positive pressure to prevent the entry of external flammable gases and dust. This places high demands on the explosion-proof performance of the air conditioners used in these compartments. Conventional air conditioners only control the outlet air pressure, neglecting to control the pressure inside the compartment and around doors and windows. This results in substandard positive pressure control outside the air conditioner vents, failing to effectively guarantee explosion-proof positive pressure. Furthermore, in existing air conditioners, the condenser side of the air inlet and outlet is directly adjacent to the air supply cavity. Frequent vibrations during piping and leaks after long-term use allow flammable and explosive substances from the condenser's air-cooled intake to leak into the evaporator side or air supply cavity, thus entering the compartment and posing a flammable and explosive hazard. Summary of the Invention

[0003] This invention provides an air conditioning device with a simple structure that can effectively monitor cabin pressure and ensure stable positive pressure explosion protection.

[0004] The technical solution adopted by this utility model is: a marine positive pressure explosion-proof air conditioning device, including an air conditioning unit and an explosion-proof electrical control box, characterized in that: the air conditioning unit is divided into a lower unit, an upper left unit, and an upper right unit; a cooling air inlet is provided on the left side of the lower unit, and a cooling air outlet is provided on the front or rear side of the lower unit; a condenser, a compressor, and a cooling fan are arranged sequentially between the cooling air inlet and outlet; a blower is provided inside the upper left unit, and an air outlet is provided on the front or rear side of the upper left unit; the air outlet delivers air to the cabin through an air supply pipe; the upper right unit is connected via an evaporator... The upper left housing and the upper right housing are equipped with a return air vent and a fresh air vent on the right side. The return air vent is connected to a return air duct with a return air fan. Return air pressure sensors are installed before and after the return air fan. The fresh air vent is connected to a fresh air duct with a fresh air fan. Fresh air pressure sensors are installed before and after the fresh air fan. The explosion-proof electrical control box is equipped with a fresh air pressure sensor, a return air pressure sensor, a supply air pressure sensor installed on the supply air vent of the air duct to the cabin, a cabin door pressure sensor installed at the cabin door, and a farthest pressure sensor in the cabin from the above-mentioned air vents and / or cabin door.

[0005] The evaporator is made of copper tubes and aluminum fins.

[0006] The compressor is connected to the condenser via a safety valve.

[0007] The condenser is connected to the evaporator via a liquid receiver, a liquid filling valve, a dryer filter, and an expansion valve. The liquid receiver, liquid filling valve, and dryer filter are located in the lower chamber, and the expansion valve is located in the upper right chamber.

[0008] The lower housing has a vertically connected cavity on its side wall corresponding to the upper right housing. A connecting pipe is installed inside the connecting cavity. Two connecting flanges are installed at the connection positions on the inner wall of the connecting cavity at both ends of the connecting pipe. The two connecting flanges are connected to the drying filter in the lower housing and to the expansion valve in the upper right housing via the connecting pipe, respectively.

[0009] The evaporator is connected to the upper flange structure of the flange pipe located at the bottom of the upper right housing via a connecting pipe flange. The pipe body of the flange pipe passes through the lower housing and is provided with a lower flange structure. The flange connection pipe of the lower flange structure is connected to the compressor.

[0010] Pressure gauges are installed inside or connected to both the lower housing and the upper right housing, and the pressure gauges are connected to the explosion-proof electrical control box.

[0011] The air supply duct is wrapped with an insulating layer.

[0012] The outermost end of the fresh air duct is also connected to a fresh air filter.

[0013] The fresh air filter includes a pre-filter and a high-efficiency filter.

[0014] The beneficial effects of this utility model are:

[0015] 1. The compressor / condenser side is located in the lower chamber, while the fresh air / return air and evaporator side are located in the upper right chamber. The supply air fan is also located in the upper right chamber. A flange structure is used to connect the pipes between the lower and upper right chambers, improving the shock resistance and preventing loosening of the pipe connections. This ensures stable connections and good sealing performance. It also effectively prevents flammable gases, dust, and other contaminants from entering the upper right and upper left chambers and the compartment, thus improving explosion-proof performance. An insulating layer is wrapped around the supply air duct to effectively prevent static electricity from entering the compartment air vents, further enhancing the explosion-proof safety of the compartment.

[0016] 2. Pressure sensors are used to monitor the pressure of the fresh air duct, return air duct, cabin air vents, cabin doors, and remote locations via an explosion-proof electrical control box. When the pressure at multiple locations in the cabin, except for the remote location, is lower than the set positive pressure explosion-proof pressure, the return air fan on the return air duct is activated to pressurize the return air. When the pressure at all multiple locations in the cabin is lower than the set positive pressure explosion-proof pressure, the fresh air fan is activated to introduce fresh air filtered through the fresh air duct to pressurize the fresh air in the cabin, ensuring that the cabin is always in a positive pressure explosion-proof state and that the overall explosion-proof performance is stable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] In the diagram: 1. Lower housing; 2. Upper left housing; 3. Upper right housing; 4. Compressor; 5. Safety valve; 6. Condenser; 7. Air-cooled inlet; 8. Cooling fan; 9. Air-cooled outlet; 10. Liquid receiver; 11. Liquid filling valve; 12. Dryer filter; 13. Connecting cavity; 14. Connecting flange; 15. Connecting pipe; 16. Expansion valve; 17. Evaporator; 18. Connecting pipe flange; 19. Return air inlet; 20. Return air duct; 21. Return air fan; 22. Return air pressure sensor; 23. Fresh air inlet; 24. Fresh air duct; 25. Fresh air fan; 26. Fresh air pressure sensor; 27. Primary filter; 28. High-efficiency filter; 29. ​​Explosion-proof control box; 30. Supply air pressure sensor; 31. Door pressure sensor; 32. Remote pressure sensor; 33. Supply air fan; 34. Supply air outlet; 35. Supply air duct. Detailed Implementation

[0019] The following explanation, in conjunction with the accompanying drawings, will provide further details.

[0020] Figure 1 As shown: A marine positive pressure explosion-proof air conditioning unit includes a lower housing 1, an upper left housing 2, an upper right housing 3, a compressor 4, a safety valve 5, a condenser 6, a cooling fan 8, a liquid receiver 10, a liquid filling valve 11, a dryer filter 12, a connecting cavity 13, a connecting flange 14, a connecting pipe 15, an expansion valve 16, an evaporator 17, a connecting pipe flange 18, a return air duct 20, a return air fan 21, a return air pressure sensor 22, a fresh air duct 24, a fresh air fan 25, a fresh air pressure sensor 26, a primary filter 27, a high-efficiency filter 28, an explosion-proof control box 29, a supply air pressure sensor 30, a hatch pressure sensor 31, a remote pressure sensor 32, a supply air fan 33, an air outlet 34, and a supply air duct 35.

[0021] The upper left housing 2 and upper right housing 3 are mounted on the lower housing 1. An air-cooled inlet 7 is located on the left side of the lower housing 1, connected to a condenser 6 inside the lower housing 1. An air-cooled outlet 9 is located on the right rear side of the lower housing 1, connected to a cooling fan 8 inside the lower housing 1. A compressor 4 is located between the condenser 6 and the cooling fan 8. The exhaust from the compressor 4 is connected to the condenser 6 via a safety valve 5. The right side of the lower housing 1 is connected to the upper right housing 3 via an upper-lower connecting cavity 13. The connecting chamber 3 is equipped with a connecting pipe 15. Both the upper and lower ends of the connecting pipe 15 are connected to the outside via connecting flanges 14. The lower end is connected to the condenser 6 via the dryer filter 12, the liquid adding valve 11, and the liquid receiver 10 in sequence. The upper end is connected to the evaporator 17 in the upper right box 3 via the expansion valve 16. The evaporator 17 is connected to the connecting pipe flange 18 on the bottom of the upper right box 3. The connecting pipe flange 18 is connected to the compressor return gas via the lower flange in the lower box 1.

[0022] An evaporator 17 is connected to the upper left box 2 and the upper right box 3 at the connection point. An air supply fan 33 is installed in the upper left box 2. An air supply port 34 corresponding to the air supply fan 33 is opened on the front side of the upper left box 2. The air supply port 34 is connected to the cabin air supply through the air supply pipe 35. An air supply pressure sensor 30 is installed on the air outlet in the cabin. An insulating layer is wrapped on the air supply pipe. A return air port 19 and a fresh air port 23 are opened on the right side of the upper right box 3. A return air pipe 20 is connected to the return air port 19. A return air fan 21 is installed on the return air pipe 20. Return air pressure sensors 22 are installed in front of and behind the return air fan 21. A fresh air pipe 24 is connected to the fresh air port 23. A fresh air fan 25 is installed on the fresh air pipe 24. A fresh air pressure sensor 26 is installed in front of and behind the fresh air fan 25. A pre-filter 27 and a high-efficiency filter 28 are installed in sequence at the outer end of the fresh air pipe 24.

[0023] An explosion-proof control box 29 is installed inside the cabin. A remote pressure sensor 32 is preferably installed at a location far away from the cabin door and / or the air outlet of the air supply duct. A cabin door pressure sensor 31 is installed at the cabin door. All sensors are connected to the explosion-proof control box.

[0024] In this embodiment, the fresh air pressure sensor and the return air pressure sensor can also be replaced by a flow meter.

Claims

1. A marine positive pressure explosion-proof air conditioning device, comprising an air conditioning box body and an explosion-proof electric control box, characterized in that: The air conditioning unit is divided into a lower unit, an upper left unit, and an upper right unit. A cooling air inlet is located on the left side of the lower unit, and a cooling air outlet is located on the front or rear side of the lower unit. A condenser, a compressor, and a cooling fan are arranged sequentially between the cooling air inlet and outlet. A blower is installed inside the upper left unit, and an air outlet is located on the front or rear side of the upper left unit. The air outlet delivers air to the cabin via an air duct. The upper right unit is connected to the upper left unit via an evaporator. A return air outlet and a fresh air outlet are located on the right side of the upper right unit. The return air outlet is connected to a return air duct with a return air fan. Return air pressure sensors are installed before and after the return air fan. The fresh air outlet is connected to a fresh air duct with a fresh air fan. Fresh air pressure sensors are installed before and after the fresh air fan. The explosion-proof electrical control box is connected to a fresh air pressure sensor, a return air pressure sensor, a blower air pressure sensor located at the air outlet of the air duct delivering air to the cabin, a door pressure sensor located at the cabin door, and a far-point pressure sensor located inside the cabin furthest from the above-mentioned air outlets and / or the cabin door.

2. A positive pressure explosion-proof air conditioning device for a ship according to claim 1, characterized in that: The evaporator is made of copper tubes and aluminum fins.

3. A positive pressure explosion-proof air conditioning device for ships according to claim 1, characterized in that: The compressor is connected to the condenser via a safety valve.

4. A positive pressure explosion-proof air conditioning device for ships according to claim 1 or 3, characterized in that: The condenser is connected to the evaporator via a liquid receiver, a liquid filling valve, a dryer filter, and an expansion valve. The liquid receiver, liquid filling valve, and dryer filter are located in the lower chamber, and the expansion valve is located in the upper right chamber.

5. A positive pressure explosion-proof air conditioning unit for marine use according to claim 4, characterized in that: The lower housing has a vertically connected cavity on its side wall corresponding to the upper right housing. A connecting pipe is installed inside the connecting cavity. Two connecting flanges are installed at the connection positions on the inner wall of the connecting cavity at both ends of the connecting pipe. The two connecting flanges are connected to the drying filter in the lower housing and to the expansion valve in the upper right housing via the connecting pipe, respectively.

6. A marine positive pressure explosion-proof air conditioning device according to claim 4, characterized in that: The evaporator is connected to the upper flange structure of the flange pipe located at the bottom of the upper right housing via a connecting pipe flange. The pipe body of the flange pipe passes through the lower housing and is provided with a lower flange structure. The flange connection pipe of the lower flange structure is connected to the compressor.

7. A marine positive pressure explosion-proof air conditioning device according to claim 1, characterized in that: Pressure gauges are installed inside or connected to both the lower housing and the upper right housing, and the pressure gauges are connected to the explosion-proof electrical control box.

8. A marine positive pressure explosion-proof air conditioning device according to claim 1, characterized in that: The air supply duct is wrapped with an insulating layer.

9. A marine positive pressure explosion-proof air conditioning device according to claim 1, characterized in that: The outermost end of the fresh air duct is also connected to a fresh air filter.

10. A marine positive pressure explosion-proof air conditioning device according to claim 9, characterized in that: The fresh air filter includes a pre-filter and a high-efficiency filter.

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