JP2023132970A - ventilation system - Google Patents

Abstract

To provide a ventilation system capable of perform ventilation suitable for a patient to be received in a hospital room according to a type of the patient.SOLUTION: A ventilation system comprises: a control section which performs ventilation of a ventilation object space S by controlling a hospital room air supply section 4 which supplies air to a hospital room 1, a hospital room air exhaust section 5 which exhausts the air from the hospital room 1, and a corridor air supply section 6 which supplies the air to a common corridor 2. The ventilation object space S is separated into a plurality of ventilation areas A including the hospital room 1 and a common corridor section 2A. The control section is adapted to: have, as ventilation modes to ventilate the ventilation areas A, a different pressure ventilation mode where the hospital room 1 and the common corridor section 2A which belong to the ventilation areas A are subjected to different pressures and a uniform pressure ventilation mode where the hospital room 1 and the common corridor section 2A which belong to the ventilation areas A are subjected to an identical pressure; and variably switch the ventilation modes of respective ventilation areas A unit by unit with one ventilation area A as one unit.SELECTED DRAWING: Figure 1

Description

The present invention relates to a ventilation system that ventilates a space to be ventilated, which includes a plurality of hospital rooms and a common corridor communicating with and adjacent to the plurality of hospital rooms.

Patent Document 1 discloses a ventilation system that ventilates a space to be ventilated that includes a plurality of hospital rooms (living space 1B) and a common corridor (common passage space 1A) that communicates with and adjoins the plurality of hospital rooms. has been done.
This ventilation system includes an air supply section (outdoor air conditioner 7, etc.) that supplies air to the common corridor, and an exhaust section (exhaust port unit 4, etc.) that exhausts air from the patient room.The air supply section supplies air to the common corridor. The space to be ventilated is ventilated by causing the air to flow through multiple patient rooms, and exhausting the air that has flowed to the multiple patient rooms from each of the multiple patient rooms using an exhaust section.
By ventilating in this way, the pressure in the hospital room becomes negative compared to the common corridor area, making it difficult for air to flow from the hospital room to the common corridor area, so even if an infected patient is admitted to the hospital room, the infected patient will not carry the virus. This makes it difficult for pathogens that were previously exposed to the air to leak into the common hallway.

Japanese Patent Application Publication No. 2000-257908

However, since the air in the common corridor flows into the patient rooms, it is difficult to admit patients other than infected patients into these patient rooms, and in particular, it is difficult to admit susceptible patients who are easily infected with pathogens. Therefore, when a patient admitted to a room in a space to be ventilated was changed from an infected patient to a general patient or an immunocompromised patient, ventilation suitable for the patient admitted to the room could not be performed.

In view of this situation, the main object of the present invention is to provide a ventilation system that can perform ventilation suitable for the patient depending on the type of patient admitted into the hospital room.

A first characteristic configuration of the present invention is a ventilation system that ventilates a space to be ventilated that is provided with a plurality of patient rooms and a common corridor communicating with and adjacent to the plurality of patient rooms, comprising:
A patient room air supply unit that supplies air to the patient room, a patient room exhaust unit that exhausts air from the patient room, and a hallway air supply unit that supplies air to the common hallway,
A control unit that controls the hospital room air supply unit, the hospital room exhaust unit, and the hallway air supply unit to ventilate the ventilation target space,
The space to be ventilated is divided into a plurality of ventilation areas including at least one of the patient rooms and a common corridor portion of the common corridor that communicates with and adjoins the patient room,
The control unit may be configured to provide a different pressure ventilation mode in which the patient room belonging to the ventilation area and the common corridor part are at different pressures, as a ventilation mode for ventilating the ventilation area, and a different pressure ventilation mode in which the patient room belonging to the ventilation area and the common corridor part are given different pressures. The ventilation mode has an equal pressure ventilation mode that makes the pressure equal to that of the corridor, and the ventilation mode is configured to be freely switchable for each ventilation area, with one ventilation area as one unit.

According to this configuration, in the ventilation area that is ventilated in the isobaric ventilation mode, multiple patient rooms and the common corridor area have equal pressure, making it possible to suppress the flow of air between the multiple patient rooms and the common hallway area. This makes it easier to accept general patients who are not identified as infected or immunocompromised patients.In addition, in the ventilation area ventilated by the different pressure ventilation mode, multiple patient rooms and common corridors have different pressures. Air can flow between hospital rooms and common corridors, making it easier to accept infected and susceptible patients. In this way, by accepting general patients, infected patients, and immunocompromised patients into rooms with different ventilation areas, and ventilating those ventilation areas with the ventilation mode depending on the patients, the space to be ventilated can be ventilated with general ventilation. While accepting patients and infected patients and immunocompromised patients at the same time, suitable ventilation can be performed for these general patients and infected patients and immunocompromised patients.
Even if the number of patients admitted to the ventilation area changes (for example, if the number of patients admitted to the ventilation area changes from normal patients to infected or immunocompromised patients), the ventilation mode of the ventilation area can be changed (for example, By switching from the ventilation mode to the different pressure ventilation mode), ventilation suitable for the patient can be performed depending on the type of patient admitted to the hospital room.

A second characteristic configuration of the present invention is that the control unit adjusts the flow rate of air in the patient room air supply part, the patient room exhaust part, and the corridor air supply part to connect the patient room to the patient room in the ventilation area. The ventilation mode is configured to be switched by changing the air balance with the common corridor.

According to this configuration, the air balance between the patient room and the common corridor in the ventilation target space can be changed by simply adjusting the flow rates of the hospital room air supply section, hospital room exhaust section, and hallway air supply section. The ventilation mode can be appropriately and easily switched.

A third feature of the present invention is that the different pressure ventilation mode includes a negative pressure ventilation mode in which the patient room has a lower pressure than the common corridor.

According to this configuration, by ventilating the ventilation area in the negative pressure ventilation mode, the patient room has a negative pressure compared to the common corridor area, so when an infected patient is admitted to the patient room, the infected patient's This makes it difficult for infected pathogens to leak into the common corridor, making it easier to accept infected patients into the hospital room. Furthermore, by setting the pressure in the hospital room to be more negative than that in the common corridor, odors generated in the hospital room are less likely to leak into the common corridor, so the patient room can be suitably used as a recuperation-type hospital room, etc.

A fourth feature of the present invention is that the different pressure ventilation mode includes a positive pressure ventilation mode in which the patient room has a more positive pressure than the common corridor.

According to this configuration, by ventilating the ventilation area in the positive pressure ventilation mode, the patient room has a more positive pressure than the common corridor area, making it difficult for pathogens floating in the common corridor area to flow into the patient room. , it becomes easier to admit susceptible patients into the hospital room.

Schematic plan view of the ventilation system Diagram showing air flow in patient rooms and common corridors in isobaric ventilation mode Diagram showing air flow in patient rooms and common corridors in negative pressure ventilation mode that supplies air only to common corridors A diagram showing the air flow in the patient room and the common corridor in negative pressure ventilation mode, which supplies air to both the hospital room and the common corridor. Diagram showing air flow in patient rooms and common corridors in positive pressure ventilation mode Ventilation system control block diagram

Embodiments of a ventilation system according to the present invention will be described based on the drawings.
As shown in FIG. 1, the ventilation system V is a system that ventilates a ventilation target space S that includes a plurality of hospital rooms 1 and a common corridor 2 that communicates with and adjoins the plurality of hospital rooms 1. The ventilation system V includes a patient room air supply section 4 that supplies air to the patient room 1, a patient room exhaust section 5 that exhausts air from the patient room 1, and a hallway air supply section 6 that supplies air to the common corridor 2. There is. As shown in FIG. 6, the ventilation system V also includes a control unit H that controls the patient room air supply unit 4, the patient room exhaust unit 5, and the hallway air supply unit 6 to ventilate the ventilation target space S. (See FIG. 6).

As shown in FIGS. 2 to 5, the patient room 1 and the common corridor 2 are configured such that patients and staff can enter and exit by opening a door 9 provided in a partition wall 8. Further, the hospital room 1 and the common corridor 2 can be ventilated through a ventilation section 10. To explain, the gap formed between the partition wall 8 and the door 9 when the door 9 is closed is used as the ventilation section 10, or the ventilation section 10 such as a ventilation louver is formed in the partition wall 8 or the door 9. This allows ventilation between the hospital room 1 and the common corridor 2. In this embodiment, the gap formed between the partition wall 8 and the door 9 when the door 9 is closed is defined as the ventilation section 10.

The patient room air supply unit 4 includes a patient room air supply duct 4A, a patient room air outlet 4B that blows air toward the patient room 1, and a patient room air supply adjustment mechanism 4C that adjusts the amount of air passing through the patient room air supply duct 4A. ing. The hospital room air outlet 4B is provided at the downstream end of the hospital room air supply duct 4A, and is installed, for example, on the ceiling of the hospital room 1. The hospital room air supply adjustment mechanism 4C is provided in the middle of the hospital room air supply duct 4A, and is configured by a motor damper (MD) or a variable air volume device (VAV).

The patient room air supply unit 4 is configured to supply air to the patient room 1 by blowing air supplied from an outside air processing air conditioner or the like into the patient room 1 from the patient room air outlet 4B through the patient room air supply duct 4A. ing. Moreover, the air supply unit 4 for the hospital room is configured to be able to adjust the amount of air supplied to the hospital room 1 by adjusting the opening degree of the valve in the hospital room air supply adjustment mechanism 4C. In FIGS. 2 to 5, the hospital room air supply adjustment mechanism 4C whose valve is open is shown in white, and the hospital room air supply adjustment mechanism 4C whose valve is closed is shown in black.

The patient room exhaust section 5 includes a patient room exhaust duct 5A, a patient room suction port 5B that sucks in air from the patient room 1, a patient room exhaust adjustment mechanism 5C that adjusts the amount of air passing through the patient room exhaust duct 5A, and an external vent that blows air out to the outside 3. It is equipped with an air outlet 5D. The hospital room suction port 5B is provided at the upstream end of the hospital room exhaust duct 5A, and is installed near the floor of the hospital room 1, for example. The hospital room exhaust adjustment mechanism 5C is provided midway through the path of the hospital room exhaust duct 5A, and is constituted by a blower such as a fan or a blower. The external air outlet 5D is provided at the downstream end of the hospital room exhaust duct 5A, and is installed on the wall that partitions the hospital room 1 and the outside 3.

The patient room exhaust section 5 drives the patient room exhaust adjustment mechanism 5C to suck the air in the patient room 1 from the patient room suction port 5B, and the sucked air passes through the patient room exhaust duct 5A to the external air outlet 5D to the outside 3. It is configured to exhaust air from the hospital room 1 by blowing out air. Further, the patient room exhaust section 5 is configured to be able to adjust the amount of exhaust air from the patient room 1 by adjusting the drive speed of the patient room exhaust adjustment mechanism 5C.

The hallway air supply unit 6 includes a hallway air supply duct 6A, a hallway air outlet 6B that blows air toward the common hallway 2, and a hallway air supply adjustment mechanism 6C that adjusts the amount of air passing through the hallway air supply duct 6A. We are prepared. The hallway air outlet 6B is provided at the downstream end of the hallway air supply duct 6A, and is installed, for example, on the ceiling of the common hallway 2. The corridor air supply adjustment mechanism 6C is provided in the middle of the corridor air supply duct 6A, and is configured by a motor damper (MD) or a variable air volume device (VAV).

The hallway air supply section 6 blows air supplied from an outside air processing air conditioner or the like into the common hallway 2 from the hallway air outlet 6B through the hallway air supply duct 6A, thereby supplying air to the common hallway 2. It is configured. Further, the hallway air supply unit 6 is configured to be able to adjust the amount of air supplied to the common hallway 2 by adjusting the opening degree of the valve in the hallway air supply adjustment mechanism 6C. In FIGS. 2 to 5, the corridor air supply adjustment mechanism 6C with an open valve is shown in white, and the corridor air supply adjustment mechanism 6C with a closed valve is shown in black.

As shown in FIG. 1, the ventilation target space S is divided into a plurality of ventilation areas A including at least one hospital room 1 and a common corridor portion 2A of the common corridor 2 that is in communication with and adjacent to the patient room 1.
In the example shown in FIG. 1, the ventilation target space S is divided into two ventilation areas A that are lined up in the left and right direction, with a common corridor 2 that extends in the vertical direction as a boundary. The ventilation area A on the left side in FIG. It also has a hallway section 2A. Similarly, ventilation area A on the right side in FIG. It also has a common corridor section 2A. In addition, an inter-area door that can be opened and closed is provided between the first ventilation area A1 and the second ventilation area A2, and the first ventilation area A1 and the second ventilation area A2 are cut off by closing the inter-area door. It is also possible to have a configuration in which this is possible.

As shown in FIGS. 1 to 5, a part of the duct is shared by the hospital room air supply section 4 and the hallway air supply section 6. To explain further, the duct shared portion 13 on the upstream side of the duct branch point 12 is shared by the hospital room air supply section 4 and the hallway air supply section 6. Further, on the downstream side of the duct branch point 12, it is branched into a hospital room air supply duct 4A and a corridor air supply duct 6A.
As shown in FIG. 1, the hospital room air supply duct 4A is branched into each of the plurality of hospital rooms 1, and each of the hospital rooms 1 is provided with a hospital room air outlet 4B. One hospital room air supply adjustment mechanism 4C is installed in each of the ventilation areas A, and the air supply amount to the patient room 1 can be adjusted in each ventilation area A by this hospital room air supply adjustment mechanism 4C. . In addition, the hallway air supply duct 6A does not branch in the middle, and one hallway air outlet 6B is provided in each ventilation area A, and the hallway air supply adjustment mechanism 6C allows each ventilation area A to be used in the common hallway. The amount of air supplied to the portion 2A can be adjusted.
In FIGS. 2 to 5, the duct configuration of the ventilation system V is schematically shown, and only the part corresponding to one hospital room air outlet 4B is shown for the downstream part of the duct branch point 12 in the hospital room air supply duct 4A. ing.

The control unit H has two ventilation modes for ventilation of the ventilation area A: a different pressure ventilation mode (see Figs. 3 to 5) in which the patient room 1 belonging to the ventilation area A and the common corridor section 2A are set to different pressures; It has an equal pressure ventilation mode (see Figure 2) that makes the pressure of the hospital room 1 belonging to A and the common corridor part 2A equal, and the ventilation mode can be freely switched for each ventilation area A with one ventilation area A as one unit. It is configured.
The different pressure ventilation modes include a negative pressure ventilation mode (see Figures 3 and 4) in which patient room 1 has a more negative pressure than the common corridor section 2A, and a positive pressure ventilation mode in which the patient room 1 has a more positive pressure than the common corridor section 2A. It has a ventilation mode (see Figure 5).

Specifically, in the ventilation system V, the ventilation mode of the first ventilation area A1 and the second ventilation area A2 can be switched separately, and the ventilation mode of the first ventilation area A1 can be changed to isobaric ventilation. In addition, the ventilation mode of the second ventilation area A2 can be switched to either the ventilation mode for equal pressure, the ventilation mode for negative pressure, or the ventilation mode for positive pressure. It is configured so that it can be switched between Therefore, it is possible to ventilate the first ventilation area A1 and the second ventilation area A2 in the same ventilation mode, or to ventilate the first ventilation area A1 and the second ventilation area A2 in different ventilation modes. .

As shown in FIG. 6, the ventilation system V is equipped with an operation panel 17 (see FIG. 6) that switches the ventilation mode of the first ventilation area A1 and the second ventilation area A2. By operating it, it is possible to switch the ventilation mode for each ventilation area A. This operation panel 17 is installed at a staff station (not shown) where staff are waiting, and allows hospital staff to switch the ventilation mode.

The control unit H adjusts the flow rate of air in the patient room air supply section 4, the patient room exhaust section 5, and the hallway air supply section 6 to maintain the air balance between the patient room 1 and the common corridor section 2A in the ventilation area A. It is configured to switch the ventilation mode by changing. That is, the control unit H operates the hospital room air supply adjustment mechanism 4C of the hospital room air supply section 4, the hospital room exhaust adjustment mechanism 5C of the hospital room exhaust section 5, and the hallway air supply adjustment mechanism 6C of the hallway air supply section 6. It is configured to switch the ventilation mode by controlling the
The supply and exhaust air for one patient room 1 in each ventilation mode of equal pressure ventilation mode, negative pressure ventilation mode, and positive pressure ventilation mode will be explained below. This will be explained as the amount of air supplied to one hospital room 1. That is, for example, when ventilation area A is ventilated in the negative pressure ventilation mode, the air supplied from the hallway air outlet 6B flows to each of the six patient rooms 1 provided in the ventilation area A, so in reality, The amount of air supplied to six patient rooms 1 is blown out from the hallway outlet 6B, but for the sake of simplicity, the amount of air blown out from the hallway outlet 6B is assumed to be the amount of air supplied to one patient room 1. explain.

As shown in FIG. 2, in the equal pressure ventilation mode, the patient room air supply section 4, the patient room exhaust section 5, and the corridor air supply section 6 are controlled so that the patient room 1 and the common corridor section 2A have equal pressure. mode.
In the example shown in FIG. 2, the equal pressure ventilation mode is an operation of the patient room air supply adjustment mechanism 4C of the patient room air supply unit 4 so that the amount of supplied air blown out from the patient room air outlet 4B becomes the equal pressure set supply amount. At the same time, the operation of the patient room exhaust adjustment mechanism 5C of the patient room exhaust section 5 is controlled so that the same amount of air as the equal-pressure set air supply amount is sucked in from the patient room suction port 5B, and furthermore, the By controlling the operation of the hallway air supply adjustment mechanism 6C of the hallway air supply unit 6 so as not to blow out air, the pressure between the hospital room 1 and the common hallway portion 2A is made equal. In this manner, when the patient room 1 is ventilated in the isobaric ventilation mode, air does not flow from the patient room 1 to the common corridor section 2A or from the common corridor section 2A to the hospital room 1. Note that the equal pressure setting air supply amount is, for example, the air supply amount per unit time that allows the inside of the hospital room 1 to be ventilated twice in one hour (2 times/h).

As shown in FIGS. 3 and 4, in the negative pressure ventilation mode, the patient room air supply section 4, the patient room exhaust section 5, and the corridor air supply This is a mode for controlling the section 6.
In the example shown in FIG. 3, the negative pressure ventilation mode controls the operation of the hallway air supply adjustment mechanism 6C of the hallway air supply unit 6 so as to blow out the negative pressure set air supply amount from the hallway air outlet 6B. The operation of the patient room exhaust adjustment mechanism 5C of the patient room exhaust section 5 is controlled so that the same amount of air as the negative pressure set air supply amount is sucked in from the patient room suction port 5B, and furthermore, the air is not blown out from the patient room air outlet 4B. By controlling the operation of the hospital room air supply adjustment mechanism 4C of the hospital room air supply section 4, the hospital room 1 is made to have a negative pressure with respect to the common corridor portion 2A. When the patient room 1 is ventilated in the negative pressure ventilation mode as described above, air at the set negative pressure supply air amount flows from the patient room 1 to the common corridor portion 2A. Note that the negative pressure set air supply amount is, for example, the air supply amount per unit time that can ventilate the inside of the hospital room 1 twice in one hour (2 times/h), and in this embodiment, it is equal to the equal pressure set air supply amount. The air supply amount is the same.

In the example shown in FIG. 4, the negative pressure ventilation mode operates the hallway air supply adjustment mechanism 6C of the hallway air supply unit 6 so as to blow out half of the negative pressure set air supply amount from the hallway air outlet 6B. At the same time, the operation of the hospital room air supply adjustment mechanism 4C of the hospital room air supply section 4 is controlled so that half of the negative pressure set air supply amount is blown out from the patient room air outlet 4B, and the operation of the hospital room air supply adjustment mechanism 4C is controlled so that the air supply amount is equal to the negative pressure set air supply amount. By controlling the operation of the hospital room exhaust adjustment mechanism 5C of the hospital room exhaust section 5 so as to draw in the same amount of air from the hospital room suction port 5B, the hospital room 1 is kept at a negative pressure with respect to the common corridor portion 2A. When the patient room 1 is ventilated in the negative pressure ventilation mode in this manner, half of the negative pressure set supply air amount flows into the patient room 1 from the common corridor portion 2A.

As shown in FIG. 5, in the positive pressure ventilation mode, the patient room air supply section 4, the patient room exhaust section 5, and the hallway air supply section 6 are operated so that the patient room 1 has a more positive pressure than the common corridor section 2A. This is a control mode.
In the example shown in FIG. 5, the positive pressure ventilation mode controls the operation of the patient room air supply adjustment mechanism 4C of the patient room air supply unit 4 so as to blow out the positive pressure set air supply amount from the patient room outlet 4B, and The operation of the hallway air supply adjustment mechanism 6C of the hallway air supply section 6 is controlled so that air does not blow out from the hallway air outlet 6B, and the operation of the hospital room exhaust section 5 is controlled to prevent air from being sucked in from the patient room suction port 5B. By controlling the operation of the adjustment mechanism 5C, the hospital room 1 is made to have a positive pressure with respect to the common corridor portion 2A.
When the patient room 1 is ventilated in the positive pressure ventilation mode as described above, air at the set positive pressure supply air amount flows from the patient room 1 to the common corridor portion 2A. At this time, the air in the common corridor section 2A flowing from the hospital room 1 is exhausted to the outside 3 by an exhaust device installed in a toilet room or the like communicating with the common corridor section 2A. In addition, the positive pressure set air supply amount is, for example, the air supply amount per unit time that can ventilate the inside of the patient room 1 twice in one hour (2 times/h), and the equal pressure set air supply amount and the negative pressure set air supply amount. The amount of air supplied is the same as the amount of air.

Furthermore, energy-saving ventilation with a reduced supply/exhaust amount may be possible in some or all of the equal pressure ventilation mode, negative pressure ventilation mode, and positive pressure ventilation mode. Specifically, at night, for example, the equal pressure set air supply amount in the equal pressure ventilation mode, the negative pressure set air supply amount in the negative pressure ventilation mode, and the positive pressure set air supply amount in the positive pressure ventilation mode are reduced by half ( The amount of air supplied to ventilate the inside of the hospital room 1 once per hour (1 time/h) may be used.

In this way, in the ventilation system V, the control unit H has a different pressure ventilation mode, a negative pressure ventilation mode, and a positive pressure ventilation mode as ventilation modes for ventilation of the ventilation area A. Since the mode can be switched freely, if general patients and infected or immunocompromised patients are admitted to hospital room 1 in different ventilation area A, but the patients admitted to ventilation area A change (e.g., ventilation area A Even if the number of patients admitted to hospital room 1 changes from a general patient to an infected patient, by switching the ventilation mode of ventilation area A (for example, switching from equal pressure ventilation mode to negative pressure ventilation mode), the number of patients admitted to room 1 can be changed. Ventilation suitable for the patient can be performed according to the type.

[Another embodiment]
Other embodiments of the present invention will be described. Note that the configurations of each embodiment described below are not limited to being applied individually, but can also be applied in combination with the configurations of other embodiments.

(1) In the above embodiment, a configuration including a negative pressure ventilation mode and a positive pressure ventilation mode was described as an example of the different pressure ventilation mode. However, the configuration may be such that the different pressure ventilation mode includes only one of the negative pressure ventilation mode and the positive pressure ventilation mode.

(2) In the above embodiment, the configuration in which one corridor air outlet 6B is provided for one ventilation area A has been described as an example. However, the configuration is not limited to this. For example, one hallway air outlet 6B is provided for one patient room 1, or one hallway air outlet 6B is provided for two opposing patient rooms 1, etc. The number of exits 6B may be changed as appropriate.

(3) In the above embodiment, an example has been described in which two ventilation areas A are set in the ventilation target space S, but three or more ventilation areas A may be set in the ventilation target space S. In this case, for example, if an infected patient or immunocompromised patient is admitted to a ventilation area A that is ventilated in a ventilation mode for different pressure, another ventilation area A adjacent to the ventilation area A is set up for ventilation in a different pressure mode. It may be possible to respond to an increase in the number of infected patients or susceptible patients by sequentially switching to the ventilation mode and sequentially expanding the ventilation area A that is ventilated in the different pressure ventilation mode.

1 Hospital room 2 Common corridor 2A Common corridor section 4 Hospital room air supply section 5 Hospital room exhaust section 6 Corridor air supply section A Ventilation area H Control section S Ventilation target space V Ventilation system

Claims (4)

A ventilation system that ventilates a space to be ventilated that is equipped with a plurality of hospital rooms and a common corridor communicating with and adjacent to the plurality of hospital rooms, the ventilation system comprising:
A patient room air supply unit that supplies air to the patient room, a patient room exhaust unit that exhausts air from the patient room, and a hallway air supply unit that supplies air to the common hallway,
A control unit that controls the hospital room air supply unit, the hospital room exhaust unit, and the hallway air supply unit to ventilate the ventilation target space,
The space to be ventilated is divided into a plurality of ventilation areas including at least one of the patient rooms and a common corridor portion of the common corridor that communicates with and adjoins the patient room,
The control unit may be configured to provide a different pressure ventilation mode in which the patient room belonging to the ventilation area and the common corridor part are at different pressures, as a ventilation mode for ventilating the ventilation area, and a different pressure ventilation mode in which the patient room belonging to the ventilation area and the common corridor part are given different pressures. The ventilation system has an equal-pressure ventilation mode that makes the pressure equal to that of a corridor, and is configured to freely switch the ventilation mode in units of ventilation areas, with one ventilation area as one unit. The control unit adjusts the flow rate of air in the hospital room air supply section, the hospital room exhaust section, and the hallway air supply section to maintain an air balance between the hospital room and the common corridor section in the ventilation area. The ventilation system of claim 1, wherein the ventilation system is configured to switch the ventilation mode by changing. 3. The ventilation system according to claim 1, wherein the different pressure ventilation mode includes a negative pressure ventilation mode in which the pressure in the patient room is lower than that in the common corridor. The ventilation system according to any one of claims 1 to 3, wherein the different pressure ventilation mode includes a positive pressure ventilation mode in which the patient room has a more positive pressure than the common corridor.

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