Floating body, differential pressure control method in floating body

Abstract

To automatically and easily maintain a differential pressure balance in multiple compartments.SOLUTION: A floating body comprises a float body with multiple compartments, a supply air duct connected to the multiple compartments, a supply air damper installed in the supply air duct and adjusting supply air quantity in the supply air duct, an exhaust duct connected to the multiple compartments, an exhaust damper installed in the exhaust duct and adjusting exhaust air quantity in the exhaust duct, a supply air unit for supplying air to the multiple compartments via the supply air duct, an exhaust unit for exhausting air from the multiple compartments via the exhaust duct, a first pressure sensor for detecting the pressure in each of the multiple compartments, and a control device for adjusting the differential pressure among the multiple compartments by controlling at least one of the supply air damper and the exhaust damper based on the difference of respective pressures in the multiple compartments detected by the first pressure sensor.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a floating body and a differential pressure control method for the floating body.

Background Art

[0002] Patent Document 1 discloses a configuration of a differential pressure holding system that holds a differential pressure between a first chamber and a second chamber having a lower pressure than the pressure in the first chamber. This differential pressure holding system includes a differential pressure damper, a ventilation resistance generating device, a differential pressure measuring device, and an arithmetic control device. The differential pressure damper opens by the pressure in the first chamber to cause a flow of gas from the first chamber to the second chamber. The ventilation resistance generating device generates a ventilation resistance for the gas supplied to the second chamber through the differential pressure damper. The differential pressure measuring device measures the differential pressure between the first chamber and the second chamber. The arithmetic control device adjusts the ventilation resistance for the gas supplied to the second chamber through the differential pressure damper based on the measured differential pressure measured by the differential pressure measuring device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the configuration disclosed in Patent Document 1, air is supplied from the first chamber to the second chamber. On the other hand, in a floating body such as a ship, it is necessary to supply air while maintaining a predetermined differential pressure (balance) for two or more compartments. In such a case, the configuration described in Patent Document 1 has a problem that it becomes difficult to appropriately supply air while maintaining the balance of the differential pressures in the plurality of compartments.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to provide a floating body capable of easily maintaining the balance of differential pressures in a plurality of compartments and a differential pressure control method for the floating body.

Means for Solving the Problems

[0006] In order to solve the above problems, the floating body according to the present disclosure includes a floating body main body, an air supply duct, an air supply damper, an exhaust duct, an exhaust damper, an air supply unit, an exhaust unit, a first pressure sensor, and a control device. The floating body main body has a plurality of compartments. The air supply duct is connected to the plurality of compartments. The air supply damper is provided in the air supply duct and adjusts the air supply amount in the air supply duct. The exhaust duct is connected to the plurality of compartments. The exhaust damper is provided in the exhaust duct and adjusts the exhaust amount in the exhaust duct. The air supply unit supplies air to the plurality of compartments via the air supply duct. The exhaust unit exhausts air from the plurality of compartments via the exhaust duct. The first sensor detects the pressures of the plurality of compartments. The control device controls at least one of the air supply damper and the exhaust damper based on the difference in the pressures of the plurality of compartments detected by the first pressure sensor to adjust the differential pressure between the plurality of compartments.

[0007] The differential pressure control method for the floating body according to the present disclosure is the differential pressure control method for the floating body described above, and includes a step of detecting the pressures of the plurality of compartments and a step of adjusting the differential pressure between the plurality of compartments. In the step of adjusting the differential pressure between the plurality of compartments, at least one of the respective air supply pressures and the respective exhaust pressures in the plurality of compartments is controlled based on the difference in the pressures of the plurality of compartments detected.

Effects of the Invention

[0008] According to the floating body and the differential pressure control method for the floating body of the present disclosure, the balance of the differential pressures in the plurality of compartments can be easily maintained.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0010] Hereinafter, a floating body and a differential pressure control method in the floating body according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 9. (Configuration of a Ship) As shown in FIG. 1, a ship (floating body) 1 as a floating body in an embodiment of the present disclosure includes a hull (floating body main body) 2 as a floating body main body and a differential pressure adjustment system 10. In this embodiment, a ship 1 such as a ferry or a passenger ship that can navigate by a main engine or the like will be described as an example of a floating body.

[0011] The hull 2 has a pair of side hulls 3A and 3B forming its outer shell, a bottom hull 4, and an upper deck 5. The side hulls 3A and 3B are provided with a pair of side shell plates respectively forming the starboard and port sides. The bottom hull 4 is provided with a bottom shell plate connecting these side hulls 3A and 3B. By means of this pair of side hulls 3A and 3B and the bottom hull 4, the outer shell of the hull 2 forms a U shape in a cross section perpendicular to the fore-and-aft direction FA. The upper deck 5 is an all-through deck exposed to the outside. An upper structure 7 having a living area is formed on the upper deck 5 of the hull 2.

[0012] The hull 2 has a plurality of compartments 8. The plurality of compartments 8 are respectively partitioned by decks adjacent vertically, longitudinal bulkheads extending in the fore-and-aft direction FA, and transverse bulkheads (none shown) extending in the beam direction, and do not communicate with each other. The uses of the plurality of compartments 8 are not limited in any way and can be used for various purposes. The plurality of compartments 8 may be provided on the same layer within the hull 2, or may be provided on different layers within the hull 2. Also, the plurality of compartments 8 may be provided in the upper structure 7.

[0013] (Configuration of the differential pressure adjustment system) As shown in FIG. 2, the differential pressure adjustment system 10 includes at least a duct section 20, an air supply unit 40, an exhaust unit 50, and a control device 60.

[0014] The duct section 20 is provided individually for the plurality of compartments 8. The duct section 20 of each compartment 8 is respectively provided with an air supply duct 21, an air supply damper 22, an exhaust duct 23, an exhaust damper 24, a first pressure sensor 31, a second pressure sensor 32, and a third pressure sensor 33.

[0015] The air supply duct 21 branches from the main air supply duct 41 of the air supply unit 40 and is connected to each compartment 8. The air supply duct 21 of each compartment 8 sends the air supply from the air supply unit 40 into the compartment 8. The air supply damper 22 is provided in the air supply duct 21. The air supply damper 22 is provided in the air supply duct 21 so as to be openable and closable. By adjusting the opening degree of the air supply damper 22, the amount of air supplied into each section 8 in the air supply duct 21 is adjusted.

[0016] The exhaust duct 23 is connected to each section 8. The exhaust ducts 23 of the plurality of sections 8 are connected to the main exhaust duct 51 of the exhaust unit 50. The exhaust duct 23 sucks the air in each section 8 by the negative pressure generated in the exhaust duct 23 and exhausts it to the outside of the section 8. The exhaust damper 24 is provided in the exhaust duct 23 so as to be openable and closable. By adjusting the opening degree of the exhaust damper 24, the amount of exhaust air from each section 8 in the exhaust duct 23 is adjusted.

[0017] The first pressure sensor 31 is provided in each section 8. The first pressure sensor 31 detects the pressure in each section 8. The first pressure sensor 31 outputs the detected pressure data (pressure value) in each section 8 to a differential pressure control unit 70 described later. The second pressure sensor 32 is provided on the downstream side of the air supply damper 22 in the air supply duct 21. The second pressure sensor 32 detects the air supply pressure from the air supply duct 21 to each section 8. The second pressure sensor 32 outputs the detected air supply pressure data (pressure value) to each section 8 to an indoor air volume adjustment unit 80 described later.

[0018] The third pressure sensor 33 is provided on the upstream side of the exhaust damper 24 in the exhaust duct 23. The third pressure sensor 33 detects the exhaust pressure from each section 8 to the exhaust duct 23. The third pressure sensor 33 outputs the detected exhaust pressure data (pressure value) from each section 8 to an indoor air volume adjustment unit 80 described later. Here, as the first pressure sensor 31, the second pressure sensor 32, and the third pressure sensor 33, a pressure transmitter (PT) can be exemplified.

[0019] The intake air unit 40, the exhaust air unit 50, and the control device 60 of this embodiment are all provided in the air conditioning chamber 9. This air conditioning chamber 9 is arranged within the hull 2.

[0020] The intake air unit 40 supplies air to a plurality of compartments 8 via the intake air duct 21. The intake air unit 40 includes a filter 42, a coil 43, an intake air fan 44, and an intake air volume adjustment unit 45. The filter 42 removes foreign substances and the like in the air by allowing the air taken in from the outside to pass through. The coil 43 is connected to a heat source (not shown) and adjusts the temperature of the air that has passed through the filter 42. The intake air fan 44 is driven by a motor (not shown). The intake air fan 44 is connected to the main intake air duct 41. The intake air fan 44 sends the air that has passed through the filter 42 and the coil 43 into the intake air ducts 21 of a plurality of compartments 8 via the main intake air duct 41.

[0021] The intake air volume adjustment unit 45 adjusts the (total) intake air volume of the intake air unit 40 with respect to a plurality of compartments 8. The intake air volume adjustment unit 45 includes an inverter (not shown) that drives the motor of the intake air fan 44, and an inverter control unit (not shown) that controls the operation of the inverter. The intake air volume adjustment unit 45 adjusts the rotational speed of the intake air fan 44 by controlling the operation of the inverter by the inverter control unit, and adjusts the intake air volume from the intake air unit 40 to a plurality of compartments 8.

[0022] Here, the differential pressure adjustment system 10 of this embodiment further includes a fourth pressure sensor 34. This fourth pressure sensor 34 detects the intake air pressure from the intake air unit 40 to a plurality of compartments 8. Specifically, the fourth pressure sensor 34 detects the pressure within the main intake air duct 41 on the outlet side of the intake air fan 44. As the fourth pressure sensor 34 of this embodiment, for example, a pressure transmitter (PT) can be exemplified.

[0023] The air supply amount adjustment unit 45 performs feedback control based on the air supply pressure from the air supply unit 40 detected by the fourth pressure sensor 34. The air supply amount adjustment unit 45 controls the operation of the air supply fan 44 based on the air supply pressure from the air supply unit 40 so that the air supply amount from the air supply unit 40 becomes a preset target air supply amount, and adjusts the air supply amount in the air supply unit 40.

[0024] The exhaust unit 50 exhausts the air in each of the plurality of compartments 8 from the plurality of compartments 8 through the exhaust duct 23. The exhaust unit 50 includes an exhaust fan 54 and an exhaust amount adjustment unit 55. The exhaust fan 54 is driven by a motor (not shown). The exhaust fan 54 is connected to the main exhaust duct 51. The exhaust fan 54 exhausts the air from the compartments 8 by sucking the air in the plurality of compartments 8 through the exhaust duct 23 of each compartment 8 and the main exhaust duct 51.

[0025] The exhaust amount adjustment unit 55 adjusts the (total) exhaust amount from the plurality of compartments 8 in the exhaust unit 50. The exhaust amount adjustment unit 55 includes an inverter (not shown) that drives the motor of the exhaust fan 54 and an inverter control unit (not shown) that controls the operation of the inverter. The exhaust amount adjustment unit 55 adjusts the rotation speed of the exhaust fan 54 by controlling the operation of the inverter by the inverter control unit, and adjusts the air supply amount from the exhaust unit 50 to the plurality of compartments 8.

[0026] Here, the differential pressure adjustment system 10 of the present embodiment further includes a fifth pressure sensor 35. This fifth pressure sensor 35 detects the exhaust pressure from the plurality of compartments 8 to the exhaust unit 50. Specifically, the fifth pressure sensor 35 detects the pressure in the main exhaust duct 51 on the inlet side of the exhaust fan 54. As the fifth pressure sensor 35 of the present embodiment, for example, a pressure transmitter (PT) can be exemplified.

[0027] The exhaust volume adjustment unit 55 performs feedback control based on the exhaust pressure in the exhaust unit 50 detected by the fifth pressure sensor 35. The exhaust volume adjustment unit 55 controls the operation of the exhaust fan 54 based on the exhaust pressure in the exhaust unit 50 so that the exhaust volume in the exhaust unit 50 becomes the preset target exhaust volume, and adjusts the exhaust volume in the exhaust unit 50. Further, the exhaust volume adjustment unit 55 controls the operation of the exhaust fan 54 based on the exhaust pressure to the exhaust unit 50 detected by the fifth pressure sensor 35 so that the exhaust volume in the exhaust unit 50 is equal to or greater than the preset minimum exhaust volume, and adjusts the exhaust volume in the exhaust unit 50.

[0028] (Hardware Configuration Diagram) As shown in FIG. 3, the control device 60 is a computer including a CPU 61 (Central Processing Unit), a ROM 62 (Read Only Memory), a RAM 63 (Random Access Memory), an HDD 64 (Hard Disk Drive), and a signal transmission / reception module 65.

[0029] (Functional Block Diagram) As shown in FIGS. 4 and 5, the CPU 61 of the control device 60 realizes the functional configurations of the differential pressure control unit 70 and the indoor air volume adjustment unit 80 by executing programs stored in the ROM 62, the HDD 64, etc. in advance. In this embodiment, the functional configurations of the differential pressure control unit 70 and the indoor air volume adjustment unit 80 are realized by one control device 60 (computer), but the functional configurations of the differential pressure control unit 70 and the indoor air volume adjustment unit 80 may be realized by executing programs on individual control devices 60.

[0030] As shown in FIG. 4, the differential pressure control unit 70 includes functional configurations of a data reception unit 71, an input reception unit 72, a differential pressure setting unit 73, a differential pressure adjustment unit 74, and a command output unit 75. The data reception unit 71 receives data on the pressure in each section 8 from the first pressure sensor 31 via the signal transmission / reception module 65.

[0031] The input receiving unit 72 receives an external input of the pressure of each section 8 and the target value of the differential pressure between a plurality of sections 8 by means of external input means (not shown) such as a keyboard and a touch pad. For example, the target value of the pressure in one section 8A among the plurality of sections 8 is input to the input receiving unit 72. Further, the target value of the differential pressure of each of the other sections 8B, 8C, etc. with respect to one section 8A among the plurality of sections 8 is input to the input receiving unit 72.

[0032] Based on the input pressure of each section 8 and the target value of the differential pressure, the differential pressure setting unit 73 calculates the total air supply amount to the plurality of sections 8 in the air supply unit 40 and the total exhaust amount from the plurality of sections 8 in the exhaust unit 50. The differential pressure setting unit 73 generates a command value indicating the calculated total air supply amount in the air supply unit 40. Further, the differential pressure setting unit 73 generates a command value indicating the calculated total exhaust amount in the exhaust unit 50. Also, the differential pressure setting unit 73 transmits the pressure of each section 8 and the target value of the differential pressure to the indoor air volume adjustment unit 80 described later.

[0033] The differential pressure adjustment unit 74 monitors the difference in the pressure of each section 8 detected by the first pressure sensor 31. The differential pressure adjustment unit 74 averages the pressure data of each section 8 transmitted from the first pressure sensor 31 of each section 8 at predetermined time intervals. The differential pressure adjustment unit 74 transmits the averaged pressure data of each section 8 to the indoor air volume adjustment unit 80.

[0034] The command output unit 75 outputs a command value indicating the total air supply amount in the air supply unit 40 calculated by the differential pressure setting unit 73 to the air supply amount adjustment unit 45 of the air supply unit 40 via the signal transmission / reception module 65. Also, the command output unit 75 outputs a command value indicating the total exhaust amount in the exhaust unit 50 calculated by the differential pressure setting unit 73 to the exhaust amount adjustment unit 55 of the exhaust unit 50.

[0035] As shown in FIG. 5, the indoor air volume adjustment unit 80 functionally includes a data receiving unit 81, a differential pressure target value receiving unit 82, a damper opening setting unit 83, a damper opening adjustment unit 84, and a command output unit 85. The data receiving unit 81 receives, via the signal transmission / reception module 65, the data of the air supply pressure to each section 8 from the second pressure sensor 32 and the data of the exhaust pressure from each section 8 by the third pressure sensor 33. The differential pressure target value receiving unit 82 receives the pressure of each section 8 and the target value of the differential pressure transmitted from the differential pressure setting unit 73.

[0036] Based on the pressure of each section 8 and the target value of the differential pressure received by the damper opening setting unit 82, the damper opening setting unit 83 sets the opening degrees of the air supply damper 22 and the exhaust damper 24 of each section 8. The damper opening setting unit 83 generates a command value indicating the set opening degrees of the air supply damper 22 and the exhaust damper 24 of each section 8.

[0037] The damper opening adjustment unit 84 monitors the difference between the air supply pressure detected by the second pressure sensor 32 and the exhaust pressure detected by the third pressure sensor 33. When the difference between the air supply pressure detected by the second pressure sensor 32 and the exhaust pressure detected by the third pressure sensor 33 deviates from a preset difference range, the damper opening adjustment unit 84 controls at least one of the air supply damper 22 and the exhaust damper 24 to automatically adjust the differential pressure between the air supply pressure in the air supply duct 21 and the exhaust pressure in the exhaust duct 23.

[0038] Further, the damper opening adjustment unit 84 automatically adjusts the differential pressure between each section 8 based on the difference in the pressure of each section 8 detected by the first pressure sensor 31. When the difference in the pressure of each section 8 deviates from a preset range with respect to the difference set by the differential pressure setting unit 73, the damper opening adjustment unit 84 controls at least one of the air supply damper 22 and the exhaust damper 24 to adjust the differential pressure between each section 8.

[0039] The command output unit 85 outputs, via the signal transmission / reception module 65, the command value indicating the set opening degrees of the air supply damper 22 and the exhaust damper 24 of each section 8 generated by the damper opening setting unit 83 to the air supply damper 22 and the exhaust damper 24 of each section 8.

[0040] (Procedure of Differential Pressure Control Method in Ship) As shown in FIG. 6, the differential pressure control method S1 of the ship 1 according to the present embodiment includes a step S2 of setting a differential pressure, a step S3 of operating the air supply unit 40 and the exhaust unit 50, a step S4 of detecting the pressure of each compartment 8, a step S5 of adjusting the differential pressure between the compartments 8, and a step S6 of ending the operation of the differential pressure adjustment system 10.

[0041] In the step S2 of setting the differential pressure, when the differential pressure adjustment system 10 is started, the input receiving unit 72 of the differential pressure control unit 70 receives, from an external input means (not shown) such as a keyboard or a touch pad, the pressure of each compartment 8 and the external input of the target value of the differential pressure between the plurality of compartments 8. For example, the target value of the pressure in one compartment 8A among the plurality of compartments 8 is input. Further, the target value of the differential pressure for each of the other compartments 8B, 8C,... with respect to one compartment 8A among the plurality of compartments 8 is input. The differential pressure setting unit 73 sets the input pressure and differential pressure of each compartment 8 as the target value of the differential pressure.

[0042] In the step S3 of operating the air supply unit 40 and the exhaust unit 50, the differential pressure setting unit 73 calculates the total air supply amount to the plurality of compartments 8 in the air supply unit 40 and the total exhaust amount from the plurality of compartments 8 in the exhaust unit 50 based on the target value of the differential pressure set in the step S2. The differential pressure setting unit 73 generates a command value indicating the total air supply amount in the air supply unit 40 calculated. Also, the differential pressure setting unit 73 generates a command value indicating the total exhaust amount in the exhaust unit 50 calculated.

[0043] The command output unit 75 outputs a command value indicating the total air supply amount in the air supply unit 40 calculated by the differential pressure setting unit 73 to the air supply amount adjustment unit 45 of the air supply unit 40. The air supply amount adjustment unit 45 that has received the command value operates the air supply fan 44 at a rotation speed corresponding to the total air supply amount in the air supply unit 40 calculated by the differential pressure setting unit 73. By the operation of the air supply fan 44, air is supplied from the air supply unit 40 to the plurality of compartments 8 through the main air supply duct 41 and the air supply duct 21.

[0044] Further, the command output unit 75 outputs a command value indicating the total exhaust volume in the exhaust unit 50 calculated by the differential pressure setting unit 73 to the exhaust volume adjustment unit 55 of the exhaust unit 50. The exhaust volume adjustment unit 55 that has received the command value operates the exhaust fan 54 at a rotation speed corresponding to the total exhaust volume in the exhaust unit 50 calculated by the differential pressure setting unit 73. Due to the operation of the exhaust fan 54, exhaust is performed from each section 8 through the exhaust duct 23 and the main exhaust duct 51.

[0045] Also, in step S3, the differential pressure setting unit 73 transmits the pressure of each section 8 and the target value of the differential pressure to the indoor air volume adjustment unit 80. In the indoor air volume adjustment unit 80, the differential pressure target value reception unit 82 receives the pressure of each section 8 and the target value of the differential pressure transmitted from the differential pressure setting unit 73. The damper opening setting unit 83 sets the opening degrees of the air supply damper 22 and the exhaust damper 24 of each section 8 based on the pressure of each section 8 and the target value of the differential pressure received by the differential pressure target value reception unit 82. The damper opening setting unit 83 generates a command value indicating the opening degrees of the air supply damper 22 and the exhaust damper 24 of each section 8 that have been set. The command value indicating the opening degrees of the air supply damper 22 and the exhaust damper 24 of each section 8 generated by the damper opening setting unit 83 is output to the air supply damper 22 and the exhaust damper 24 of each section 8 by the command output unit 85. The air supply damper 22 and the exhaust damper 24 of each section 8 open the flow paths in the air supply duct 21 and the exhaust duct 23 at the opening degrees based on the output command value. In this way, air is supplied from the air supply unit 40 to each section 8, and exhaust is performed from each section 8 to the exhaust unit 50.

[0046] In step S4 of detecting the pressure in each section 8, the first pressure sensor 31 detects the pressure in each section 8. The pressure data of each section 8 detected by the first pressure sensor 31 is transmitted to the differential pressure control unit 70. In the differential pressure control unit 70, the data receiving unit 71 receives the pressure data of each section 8 from the first pressure sensor 31. The differential pressure adjusting unit 74 monitors the difference in the pressure of each section 8 detected by the first pressure sensor 31. The differential pressure adjusting unit 74 averages the pressure data of each section 8 transmitted from the first pressure sensor 31 of each section 8 at predetermined time intervals. The differential pressure adjusting unit 74 transmits the averaged pressure data of each section 8 to the indoor air volume adjusting unit 80.

[0047] In step S5 of adjusting the differential pressure between the sections 8, when the indoor air volume adjusting unit 80 receives the pressure data of each section 8 transmitted from the differential pressure adjusting unit 74, the damper opening adjusting unit 84 automatically adjusts the differential pressure between the sections 8 based on the difference in the pressure of each section 8. When the difference in the pressure of each section 8 deviates from a predetermined range set by the differential pressure setting unit 73, the damper opening adjusting unit 84 controls the opening of at least one of the supply damper 22 and the exhaust damper 24 to adjust the supply air volume to each section 8 and the exhaust air volume from each section 8. In the section 8 where the opening of at least one of the supply damper 22 and the exhaust damper 24 is changed, the pressure in the section 8 changes. Thereby, the differential pressure between the sections 8 is adjusted.

[0048] In the differential pressure adjustment system 10, steps S4 and S5 described above are repeatedly executed at predetermined time intervals set in advance until the operation of the differential pressure adjustment system 10 is terminated. Further, when a command to terminate the operation of the differential pressure adjustment system 10 is given from the outside, step S6 to terminate the operation of the differential pressure adjustment system 10 is executed. In step S6 to terminate the operation of the differential pressure adjustment system 10, the differential pressure control unit 70 outputs a command to terminate the operation to the air supply unit 40 and the exhaust unit 50, to the air supply amount adjustment unit 45 of the air supply unit 40 and the exhaust amount adjustment unit 55 of the exhaust unit 50. The air supply amount adjustment unit 45 that has received the command terminates the operation of the air supply fan 44. The exhaust amount adjustment unit 55 terminates the operation of the exhaust fan 54. As a result, the air supply from the air supply unit 40 and the exhaust in the exhaust unit 50 are stopped.

[0049] (Control procedure for the operation of the air supply unit and the exhaust unit) In the differential pressure control method S1 in the ship 1 according to the present embodiment, while the differential pressure adjustment system 10 is operating, the operations of the air supply unit 40 and the exhaust unit 50 are controlled as follows. In the air supply unit 40, in step S4 above, when receiving the command value indicating the total air supply amount in the air supply unit 40 calculated by the air supply pressure setting unit 73, as shown in FIG. 7, the air supply amount adjustment unit 45 operates the air supply fan 44 at the rotation speed corresponding to the total air supply amount in the air supply unit 40 (step S11). The fourth pressure sensor 34 detects the air supply pressure from the air supply unit 40 to the plurality of compartments 8 (step S12). The fourth pressure sensor 34 outputs the detected air supply pressure data to the air supply amount adjustment unit 45. The air supply amount adjustment unit 45 determines whether or not the air supply pressure from the air supply unit 40 detected by the fourth pressure sensor 34 has reached the pressure corresponding to the preset target air supply amount (step S13). When the air supply pressure has not reached the pressure corresponding to the target air supply amount, the rotation speed of the air supply fan 44 is increased by a predetermined number of rotations (step S14). The air supply amount adjustment unit 45 repeats steps S12 to S14 until the air supply pressure reaches the pressure corresponding to the target air supply amount. When the air supply pressure has reached the pressure corresponding to the target air supply amount, the air supply amount adjustment unit 45 maintains the rotation speed of the air supply fan 44 (step S15).

[0050] On the other hand, in the exhaust unit 50, when receiving the command value indicating the total exhaust volume in the exhaust unit 50 calculated by the differential pressure setting unit 73 in the above step S4, as shown in FIG. 8, the exhaust volume adjustment unit 55 of the exhaust unit 50 operates the exhaust fan 54 at the rotation speed corresponding to the total exhaust volume in the exhaust unit 50 (step S21). The fifth pressure sensor 35 detects the exhaust pressure from a plurality of compartments 8 in the exhaust unit 50 (step S22). The fifth pressure sensor 35 outputs the detected exhaust pressure data to the exhaust volume adjustment unit 55. The exhaust volume adjustment unit 55 determines whether the exhaust pressure in the exhaust unit 50 detected by the fifth pressure sensor 35 has reached the pressure corresponding to the preset target exhaust volume (step S23). If the exhaust pressure has not reached the pressure corresponding to the target exhaust volume, the rotation speed of the exhaust fan 54 is increased by a preset number of rotations (step S24). The exhaust volume adjustment unit 55 repeats steps S22 to S24 until the exhaust pressure reaches the pressure corresponding to the target exhaust volume. When the exhaust pressure reaches the pressure corresponding to the target exhaust volume, the exhaust volume adjustment unit 55 maintains the rotation speed of the exhaust fan 54 (step S25).

[0051] Also, the exhaust volume adjustment unit 55 determines whether the exhaust volume in the exhaust unit 50 is equal to or greater than the preset minimum exhaust volume based on the exhaust pressure in the exhaust unit 50 detected by the fifth pressure sensor 35 (step S26). As a result, if the exhaust volume in the exhaust unit 50 is equal to or greater than the preset minimum exhaust volume, the process returns to step S22 and the process is repeated every predetermined time. In step S26, if the exhaust volume in the exhaust unit 50 is less than the preset minimum exhaust volume, the exhaust volume adjustment unit 55 increases the rotation speed of the exhaust fan 54 by a preset number of rotations (step S27).

[0052] Further, the exhaust gas volume adjustment unit 55 outputs a signal indicating that the rotation speed of the exhaust fan 54 has been increased to the intake air volume adjustment unit 45 of the intake air unit 40. When the intake air volume adjustment unit 45 receives a signal indicating that the rotation speed of the exhaust fan 54 has been increased from the exhaust gas volume adjustment unit 55, it increases the rotation speed of the intake air fan 44 by an amount corresponding to the increase in the rotation speed of the exhaust fan 54. Thereby, the difference between the total intake air volume from the intake air unit 40 and the total exhaust gas volume in the exhaust unit 50 is maintained to be the same as before the increase in the rotation speed of the exhaust fan 54. Note that the increase in the rotation speed of the intake air fan 44 accompanying the increase in the rotation speed of the exhaust fan 54 may be controlled by the differential pressure control unit 70 instead of the intake air volume adjustment unit 45.

[0053] (Procedure for pressure adjustment in each section) In the differential pressure control method S1 in the ship 1 according to the present embodiment, while the differential pressure adjustment system 10 is operating, in each section 8, the opening degrees of the intake air damper 22 and the exhaust damper 24 are controlled as follows. As shown in FIG. 9, in each section 8, the second pressure sensor 32 detects the intake air pressure from the intake air duct 21 to each section 8. The third pressure sensor 33 detects the exhaust pressure from each section 8 to the exhaust duct 23. The second pressure sensor 32 outputs the detected data of the intake air pressure to each section 8 to the indoor air volume adjustment unit 80. The third pressure sensor 33 outputs the detected data (pressure value) of the exhaust pressure from each section 8 to the indoor air volume adjustment unit 80.

[0054] In the indoor air volume adjustment unit 80, the data receiving unit 81 receives the data of the intake air pressure to each section 8 from the second pressure sensor 32 and the data of the exhaust pressure from each section 8 by the third pressure sensor 33 (step S31).

[0055] The damper opening adjustment unit 84 monitors the difference between the intake air pressure detected by the second pressure sensor 32 and the exhaust pressure detected by the third pressure sensor 33 (step S32). The damper opening adjustment unit 84 determines whether or not the difference between the intake air pressure detected by the second pressure sensor 32 and the exhaust pressure detected by the third pressure sensor 33 falls within a preset difference range (step S33). As a result, if the difference between the intake air pressure detected by the second pressure sensor 32 and the exhaust pressure detected by the third pressure sensor 33 falls within the preset difference range, the process returns to step S31 and the process is repeated. If the difference between the intake air pressure detected by the second pressure sensor 32 and the exhaust pressure detected by the third pressure sensor 33 deviates from the preset difference range, the damper opening adjustment unit 84 adjusts the differential pressure between the intake air pressure in the intake duct 21 and the exhaust pressure in the exhaust duct 23 (step S34). For this, the opening degree of at least one of the intake damper 22 and the exhaust damper 24 is changed by a preset amount (unit opening degree). Thereafter, the process returns to step S32, and in step S33, the same process is repeated until the difference between the intake air pressure detected by the second pressure sensor 32 and the exhaust pressure detected by the third pressure sensor 33 falls within the preset difference range. Thereby, the difference between the intake air pressure detected by the second pressure sensor 32 and the exhaust pressure detected by the third pressure sensor 33 in each section 8 is appropriately maintained.

[0056] (Function and effect) In the floating body 1 of the above embodiment and the differential pressure control method S1 in the floating body 1, the control device 60 controls at least one of the intake damper 22 and the exhaust damper 24 based on the difference in pressure of each section 8 detected by the first pressure sensor 31. Thereby, the intake air amount in the intake duct 21 and the exhaust air amount in the exhaust duct 23 are adjusted. Therefore, the differential pressure between each section 8 can be automatically adjusted. As a result, it becomes possible to easily maintain the balance of the differential pressures in the plurality of sections 8.

[0057] In the above embodiment, the second pressure sensor 32 detects the air supply pressure from the air supply duct 21 in each section 8. The third pressure sensor 33 detects the exhaust pressure from each section 8 to the exhaust duct 23. The control device 60 controls at least one of the air supply damper 22 and the exhaust damper 24 based on the difference between the air supply pressure and the exhaust pressure in each section 8. Thereby, the differential pressure between the air supply pressure in the air supply duct 21 and the exhaust pressure in the exhaust duct 23 can be automatically adjusted within a preset range.

[0058] In the above embodiment, the fourth pressure sensor 34 detects the air supply pressure from the air supply unit 40 to the plurality of sections 8. The air supply amount adjustment unit 45 adjusts the air supply amount in the air supply unit 40 by performing feedback control based on the air supply pressure from the air supply unit 40 to the plurality of sections 8. Thereby, the air supply amount from the air supply unit 40 is automatically adjusted to be a preset target air supply amount.

[0059] In the above embodiment, the fifth pressure sensor 35 detects the exhaust pressure from the plurality of sections 8 to the exhaust unit 50. The exhaust amount adjustment unit 55 adjusts the exhaust amount in the exhaust unit 50 by performing feedback control based on the exhaust pressure to the exhaust unit 50. Thereby, the exhaust amount from the exhaust unit 50 is automatically adjusted to be a preset target exhaust amount.

[0060] In the above embodiment, the exhaust amount adjustment unit 55 adjusts the exhaust amount in the exhaust unit 50 so that the exhaust amount in the exhaust unit 50 is equal to or greater than a preset minimum exhaust amount. Thereby, the exhaust amount adjustment unit 55 can be automatically adjusted while maintaining the exhaust amount in the exhaust unit 50 at or above the minimum exhaust amount.

[0061] (Other Embodiments) As described above, the embodiments of the present disclosure have been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within the scope not departing from the gist of the present disclosure are also included. In the above-described embodiment, pressure transmitters are used as the first pressure sensor 31, the second pressure sensor 32, and the third pressure sensor 33, but the present invention is not limited to this. As the first pressure sensor 31, the second pressure sensor 32, and the third pressure sensor 33, various pressure sensors other than pressure transmitters can also be used. In the above-described embodiment, the air supply unit 40, the exhaust unit 50, and the control device 60 are provided in the air conditioning chamber 9, but the present invention is not limited to this. The air supply unit 40, the exhaust unit 50, and the control device 60 may be distributed and arranged at a plurality of locations within the hull 2. Further, in the above-described embodiment, the ship 1 that can navigate by a main engine or the like is exemplified as the floating body, but the present invention is not limited to this. The configuration of the present disclosure is applicable to, for example, a floating body that does not have a power source for navigation.

[0062] <Appendix> The floating body 1 and the differential pressure control method S1 in the floating body 1 described in the embodiment are understood as follows, for example.

[0063] (1) The floating body 1 according to the first aspect includes a floating body main body 2 having a plurality of compartments 8, an air supply duct 21 connected to the plurality of compartments 8, an air supply damper 22 provided in the air supply duct 21 for adjusting the air supply amount in the air supply duct 21, an exhaust duct 23 connected to the plurality of compartments 8, an exhaust damper 24 provided in the exhaust duct 23 for adjusting the exhaust amount in the exhaust duct 23, an air supply unit 40 for supplying air to the plurality of compartments 8 via the air supply duct 21, an exhaust unit 50 for exhausting air from the plurality of compartments 8 via the exhaust duct 23, a first pressure sensor 31 for detecting the pressure of the plurality of compartments 8, and a control device 60 for controlling at least one of the air supply damper 22 and the exhaust damper 24 based on the difference between the pressures of the plurality of compartments 8 detected by the first pressure sensor 31 to adjust the differential pressure between the plurality of compartments 8. Examples of the floating body 1 include ships and floating structures.

[0064] By configuring in this way, the differential pressure between the respective compartments 8 can be automatically adjusted. As a result, it becomes possible to easily maintain the balance of the differential pressure in the plurality of compartments 8.

[0065] (2) The floating body 1 according to the second aspect is the floating body 1 of (1), further comprising a second pressure sensor 32 that detects each supply air pressure from the supply air duct 21 to the plurality of compartments 8, and a third pressure sensor 33 that detects each exhaust air pressure from the plurality of compartments 8 to the exhaust air duct 23. The control device 60 controls at least one of the supply air damper 22 and the exhaust air damper 24 based on the difference between the supply air pressure detected by the second pressure sensor 32 and the exhaust air pressure detected by the third pressure sensor 33, to adjust the differential pressure between the supply air pressure in the supply air duct 21 and the exhaust air pressure in the exhaust air duct 23. Thereby, the differential pressure between the supply air pressure in the supply air duct 21 and the exhaust air pressure in the exhaust air duct 23 can be automatically adjusted within a preset range.

[0066] (3) The floating body 1 according to the third aspect is the floating body 1 of (1) or (2), further comprising a fourth pressure sensor 34 that detects the supply air pressure from the supply air unit 40 to the plurality of compartments 8, and an air supply amount adjustment unit 45 that adjusts the air supply amount in the supply air unit 40. The air supply amount adjustment unit 45 adjusts the air supply amount in the supply air unit 40 such that the air supply amount from the supply air unit 40 becomes a preset target air supply amount based on the supply air pressure from the supply air unit 40 detected by the fourth pressure sensor 34. Thereby, the air supply amount from the supply air unit 40 is automatically adjusted to become a preset target air supply amount.

[0067] (4) The floating body 1 according to the fourth aspect is the floating body 1 of (3), further comprising a fifth pressure sensor 35 that detects the exhaust pressure from a plurality of the compartments 8 to the exhaust unit 50, and an exhaust volume adjustment unit 55 that adjusts the exhaust volume in the exhaust unit 50. The exhaust volume adjustment unit 55 adjusts the exhaust volume in the exhaust unit 50 based on the exhaust pressure to the exhaust unit 50 detected by the fifth pressure sensor 35 so that the exhaust volume in the exhaust unit 50 becomes a preset target exhaust volume. Thereby, the exhaust volume from the exhaust unit 50 is automatically adjusted so as to become a preset target exhaust volume.

[0068] (5) The floating body 1 according to the fifth aspect is the floating body 1 of (4), wherein the exhaust volume adjustment unit 55 adjusts the exhaust volume in the exhaust unit 50 based on the exhaust pressure to the exhaust unit 50 detected by the fifth pressure sensor 35 so that the exhaust volume in the exhaust unit 50 is equal to or greater than a preset minimum exhaust volume. Thereby, the exhaust volume adjustment unit 55 can be automatically adjusted while maintaining the exhaust volume in the exhaust unit 50 at a level equal to or greater than the minimum exhaust volume.

[0069] (6) The differential pressure control method S1 in the floating body 1 according to the sixth aspect is the differential pressure control method S1 in any one of the floating bodies 1 from (1) to (5), including a step S3 of detecting the pressures of a plurality of the compartments 8, and a step S4 of controlling at least one of the air supply pressure and the exhaust pressure in the plurality of the compartments 8 based on the difference between the detected pressures of the plurality of the compartments 8 to adjust the differential pressure between the plurality of the compartments 8. Thereby, the differential pressure between a plurality of the compartments 8 can be automatically adjusted. As a result, it becomes possible to easily maintain the balance of the differential pressures in the plurality of the compartments 8.

Explanation of reference numerals

[0070] 1…Ship (floating body) 2…Hull (floating body main body) 3A, 3B…Side 4…Bottom of the ship 5…Upper deck 7…Superstructure 8, 8A, 8B, 8C…Compartment 9…Air conditioning room 10…Differential pressure adjustment system 20…Duct section 21…Supply air duct 22…Supply air damper 23…Exhaust duct 24…Exhaust damper 31…First pressure sensor 32…Second pressure sensor 33…Third pressure sensor 34…Fourth pressure sensor 35…Fifth pressure sensor 40…Supply air unit 41…Main supply air duct 42…Filter 43…Coil 44…Supply air fan 45…Supply air volume adjustment unit 50…Exhaust unit 51…Main exhaust duct 54…Exhaust fan 55…Exhaust volume adjustment unit 60…Control device 61…CPU 62…ROM 63…RAM 64…HDD 65…Signal transmission and reception module 70…Differential pressure control unit 71…Data reception unit 72…Input reception unit 73…Differential pressure setting unit 74…Differential pressure adjustment unit 75…Command output unit 80…Indoor air volume adjustment unit 81…Data reception unit 82…Differential pressure target value reception unit 83…Damper opening setting unit 84…Damper opening adjustment unit 85…Command output unit

Claims

1. A floating body main body having a plurality of compartments, An air supply duct connected to the plurality of compartments, An air supply damper provided in the air supply duct for adjusting the air supply amount in the air supply duct, An exhaust duct connected to the plurality of compartments, An exhaust damper provided in the exhaust duct for adjusting the exhaust amount in the exhaust duct, An air supply unit for supplying air to the plurality of compartments via the air supply duct, An exhaust unit for exhausting air from the plurality of compartments via the exhaust duct, A first pressure sensor for detecting the pressure of the plurality of compartments, A control device for controlling at least one of the air supply damper and the exhaust damper based on the difference in pressure of each of the plurality of compartments detected by the first pressure sensor to adjust the differential pressure between the plurality of compartments, A floating body comprising the above.

2. A second pressure sensor for detecting each air supply pressure from the air supply duct to the plurality of compartments, A third pressure sensor for detecting each exhaust pressure from the plurality of compartments to the exhaust duct, further comprising, The control device controls at least one of the air supply damper and the exhaust damper based on the difference between the air supply pressure detected by the second pressure sensor and the exhaust pressure detected by the third pressure sensor to adjust the differential pressure between the air supply pressure in the air supply duct and the exhaust pressure in the exhaust duct. The floating body according to claim 1.

3. A fourth pressure sensor for detecting the air supply pressure from the air supply unit to the plurality of compartments, An air supply amount adjustment unit for adjusting the air supply amount in the air supply unit, further comprising, The air supply amount adjustment unit adjusts the air supply amount in the air supply unit so that the air supply amount from the air supply unit becomes a preset target air supply amount based on the air supply pressure from the air supply unit detected by the fourth pressure sensor. The floating body according to claim 1 or 2.

4. A fifth pressure sensor for detecting the exhaust pressure from the plurality of compartments to the exhaust unit, An exhaust amount adjustment unit for adjusting the exhaust amount in the exhaust unit, further comprising, The exhaust amount adjustment unit adjusts the exhaust amount in the exhaust unit so that the exhaust amount in the exhaust unit becomes a preset target exhaust amount based on the exhaust pressure to the exhaust unit detected by the fifth pressure sensor. The floating body according to claim 3.

5. The exhaust volume adjustment unit adjusts the exhaust volume in the exhaust unit so that the exhaust volume in the exhaust unit is equal to or greater than a preset minimum exhaust volume based on the exhaust pressure on the exhaust unit detected by the fifth pressure sensor. The floating body according to claim 4.

6. A differential pressure control method for a floating body according to any one of claims 1 to 5, comprising: detecting the pressures of a plurality of the compartments; controlling at least one of the air supply pressures and the exhaust pressures in the plurality of compartments based on the differences between the detected pressures of the plurality of compartments to adjust the differential pressure between the plurality of compartments.

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