[0040] The present invention will be further explained below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.
[0041] Such as figure 1 and figure 2 As shown, the modular cabin cleanliness control system provided by the present invention can achieve different cleanliness requirements in the same cabin. The invention adopts modular design and composition, and includes a water source heat pump unit module, a hydraulic module, a purification air conditioning module, 4 air conditioning air supply terminals 1, 4 air conditioning return air terminals 2 and a PLC control unit.
[0042] Four air-conditioning air supply terminals 1 and four air-conditioning return air terminals 2 are arranged in the cabin, and each air-conditioning air supply terminal 1 is provided with a high-efficiency filter.
[0043] The cabin is also provided with a differential pressure sensor 3, a residual pressure control valve 4, and a touch-type liquid crystal display panel 5 for human-computer interaction with the PLC control unit.
[0044] The user sets the required cleanliness level through the touch-type liquid crystal display panel 5 according to the environmental requirements of the different cleanliness of the cabin. The PLC control unit adjusts the volume of fresh air sent into the cabin through the four air-conditioning air supply terminals 1 from the clean air conditioning module according to the set cleanliness level to meet the air volume requirements of the cabin under different cleanliness levels. At the same time, the differential pressure sensor 3 feeds back the differential pressure signal to the PLC control unit, and the PLC control unit adjusts the fresh air and return air sent to the purification air conditioning module according to the feedback differential pressure signal (for example, using an electric air valve to adjust) to increase the cabin pressure. The PLC control unit can also open the residual pressure control valve 4 according to the feedback pressure difference signal to release the pressure in the cabin. The pressure of the system provided by the present invention meets the preset positive pressure requirement. Positive pressure In order to ensure that the externally contaminated gas does not enter the cabin, the positive pressure of the cabin always maintains a constant value for cabins with cleanliness requirements. The user can set the positive pressure value of the cabin through the touch liquid crystal display panel 5, or pre-set the positive pressure value of the cabin in the software run by the PLC control unit.
[0045] In this embodiment, as image 3 As shown, the purification air conditioning module includes a new/return air mixing section, a G4 level coarse-effect filter section, a F7 level medium-efficiency filter section, a cooling/heating section, a humidification section and a frequency conversion fan section, among which:
[0046] The new/return air mixing section is connected to the four air conditioning return air terminals 2, and at the same time, the external fresh air is also sent into the new/return air mixing section. Air conditioning return air and external fresh air are mixed in the new/return air mixing section to form mixed fresh air.
[0047] The G4 coarse-efficiency filter section is used for G4 coarse-efficiency filtration of mixed fresh air.
[0048] The F7-level intermediate-efficiency filter section is used to perform F7-level intermediate-efficiency filtration on the mixed fresh air that has been coarsely filtered.
[0049] The cooling/heating section is used to cool/heat the mixed fresh air that has been filtered through coarse and medium efficiency. Such as figure 1 As shown, the system provided by the present invention can be independent of other air-conditioning systems, has two-way refrigeration/heating supply, and can be switched as required to meet the use requirements in any season.
[0050] When the ship's existing central air-conditioning system is turned on in winter and summer, the cold/heat medium water of the central air-conditioning system can be sent to the refrigeration/heating section to cool/heat the mixed fresh air.
[0051] When the central air-conditioning system is closed in spring and autumn, the water source heat pump unit module and the hydraulic module can be activated to cool/heat the mixed fresh air. In this embodiment, the hydraulic module includes an expansion tank 6, a refrigerant water pump 7 and a drain valve 8. The outlet of the refrigerant water pump 7 is communicated with the water source heat pump unit module. The inlet of the refrigerant water pump 7 is connected to the water supply port, receives the cold/heated water returned from the refrigeration/heating section, and communicates with the expansion tank 6. The expansion tank 6 is in communication with the water supply port and receives the cold/heat medium water returned from the cooling/heating section. When the cold/heat medium water pressure of the system is insufficient, the water supply port is used to supplement water, and the refrigerant water pump 7 provides cold/heat medium water to the water source heat pump unit module to ensure the normal supply of cold/heat medium water in the system. The drain valve 8 is used for system cleaning and maintenance, or draining water when the pressure is too high.
[0052] The water source heat pump unit module is connected with the cooling water outlet and the cooling water inlet, and the cooling water is used to exchange the heat of the cold/heat medium water provided by the hydraulic module, and then it is provided to the cooling/heating section of the purification air conditioning module for cooling/heating mixing Fresh air.
[0053] The above-mentioned central air conditioning system, water source heat pump unit module, and hydraulic module can be switched and operated at any time in any season to ensure the cooling/heating supply of the purified air conditioning module.
[0054] The humidification section is used to humidify the mixed fresh air after cooling/heating.
[0055] The frequency conversion fan section sends the humidified mixed fresh air to the four air supply ends of the air conditioner according to a certain air volume under the control of the control module, and the air volume adjustment is realized through the frequency conversion fan section.
[0056] The system provided by the invention adopts a modular design, has a compact structure, can be arranged in combination or distributed, has a small floor area and is reliable in control. The invention can realize multiple cleanliness control of a cabin and meet different usage requirements.
