Ventilation system

Abstract

To prevent such a deterioration in the quality of air in a space to be ventilated having a main living room and a temporary use living room, that carbon dioxide concentration rises due to a shortage of ventilation in each of the living rooms while saving energy for a ventilation system.SOLUTION: A ventilation system 1 is provided for ventilating a space S to be ventilated where a main living room S1 and a temporary use living room S2 communicated with the main living room S1 are partitioned. To the main living room S1, outside air OA is supplied by an air supply fan 7, and in the temporary use living room S2, a ventilation fan 12 for discharging inside air from the living room S2 and a human detection sensor 13 are provided. When A person staying in the living room is detected by the human detection sensor 13, third type ventilation is performed by the ventilation fan 12. A set ventilation amount for the space S to be ventilated is set to be lower than a ventilation amount according to the total number of persons to be accommodated for the space S to be ventilated, which is obtained by adding the numbers of persons to be accommodated, set in the main living room S1 and the temporary use living room S2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a ventilation system for ventilating a ventilation target space partitioned between a main living room and a temporarily used living room communicating with the main living room.

Background Art

[0002] As the background art of the present invention, for example, there is a ventilation system having a primary area (a living room such as an office) and a secondary area (a shared toilet) communicating with the primary area, the secondary area having a plurality of individual areas (toilet booths), the primary area being supplied with outside air by a primary side supply air fan, and in each of the individual areas, a detection unit (such as a human sensor) is provided, and third type ventilation is performed based on the detection result of the detection unit (see, for example, Patent Document 1).

[0003] Also, for example, there is a ventilation system having a shared area (such as a conversation room or a cafeteria) and an individual private room area communicating with the shared area, the shared air conditioning space of the shared area being supplied with air-conditioned air from an air conditioner, and in the individual private room area, third type ventilation is performed by forced exhaust means (see, for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the technique described in Patent Document 1, since the primary area is a living room and the secondary area is a shared toilet that does not correspond to a living room, as the ventilation volume of the ventilation target space including the primary area and the secondary area, it is common to set the ventilation volume according to the number of occupants in the primary area.

[0006] On the other hand, in the technology described in Patent Document 2, since both the individual private room area and the common area are living spaces, the set ventilation rate for the ventilation target space including the individual private room area and the common area is set to a ventilation rate corresponding to the total occupancy of the ventilation target space, which is the sum of the occupancy rates set for each area of ​​the individual private room area and the common area (hereinafter referred to as the ventilation rate corresponding to the formal total occupancy of the ventilation target space). This ensures that sufficient ventilation is provided to each area, and even if the number of occupants in each area (living space) reaches its occupancy rate, it is common to prevent deterioration of air quality, such as an increase in carbon dioxide concentration due to insufficient ventilation in each area.

[0007] Incidentally, if the space to be ventilated is laid out to include a main room (e.g., an office) and a temporary room (e.g., a conference room) used by the personnel of the main room, then fluctuations in the number of people in each room within this space to be ventilated are mainly due to the movement of personnel from the main room between the main room and the temporary room, causing the number of people in those rooms to increase or decrease in a reciprocal manner, and it is virtually impossible for the number of people in each room to reach its capacity.

[0008] Therefore, in a ventilation target space that has a main room and a temporary room, if the set ventilation rate for the ventilation target space is set to a rate corresponding to the formal total occupancy of the ventilation target space as described above, then in this ventilation target space, even though the number of people in the ventilation target space will almost never reach the formal total occupancy, ventilation will always be performed at a rate corresponding to the formal total occupancy, resulting in waste. Thus, there is room for improvement in terms of energy saving of the ventilation system.

[0009] In light of this situation, the main objective of the present invention is to enable energy conservation in the ventilation system in a space having a main living room and a temporary living room, while preventing deterioration of air quality, such as an increase in carbon dioxide concentration due to insufficient ventilation in each room. [Means for solving the problem]

[0010] The first characteristic configuration of the present invention is a ventilation system for ventilating a space to be ventilated, which is partitioned off from a main living room and a temporary living room connected to the main living room, The main living room is supplied with outside air by an air supply fan. In the aforementioned temporary occupancy room, a ventilation fan for exhausting the internal air of the room and a motion sensor are provided, and the room is configured to perform type 3 ventilation by the ventilation fan when the motion sensor detects the presence of a person. The set ventilation rate for the aforementioned ventilation target space is The ventilation rate must be equal to or greater than the number of occupants in the main room, and The key point is that the ventilation rate is set lower than the ventilation rate corresponding to the total occupancy of the ventilation target space, which is the sum of the occupancy rates set for each room, namely the main room and the temporary occupancy room.

[0011] According to this configuration, ventilation of the space to be ventilated is performed at a set ventilation rate lower than the ventilation rate corresponding to the formal total occupancy of the space to be ventilated, which includes a main room and a temporary room (the ventilation rate corresponding to the total occupancy of the space to be ventilated, which is the sum of the occupancy rates set for each room, the main room and the temporary room). Therefore, compared to the case where ventilation is performed at a ventilation rate corresponding to the formal total occupancy of the space to be ventilated, the energy efficiency of the ventilation system can be improved.

[0012] Furthermore, regardless of the number of people in the main room, outside air based on the aforementioned set ventilation rate is always supplied to the main room by an air supply fan. When some of the people in the main room move to a temporary room, a motion sensor in that temporary room detects the presence of people, and based on this detection, the ventilation fan in the temporary room performs Type 3 ventilation, drawing the internal air from the main room into the temporary room. At this time, the level of contamination of the internal air from the main room drawn into the temporary room decreases according to the number of people who have moved to that temporary room. Therefore, the more people who move to the temporary room, the more fresh and less contaminated air will be supplied from the main room to the temporary room.

[0013] In other words, the set ventilation rate of outside air (fresh air) supplied to the main room by the supply fan can be appropriately distributed from the main room to the temporary room in accordance with the movement of people between the main room and the temporary room within the space to be ventilated. Furthermore, the freshness of the air distributed from the main room to the temporary room can be adjusted according to the number of people moving between the main room and the temporary room. Therefore, even if the set ventilation rate of the space to be ventilated is set lower than the ventilation rate corresponding to the formal total occupancy of the space, it is possible to prevent deterioration of air quality, such as an increase in carbon dioxide concentration due to insufficient ventilation, in both the main room and the temporary room.

[0014] As a result, while saving energy in the ventilation system, it becomes possible to appropriately distribute and supply fresh air to the main living area and temporary living areas, taking into account the movement of people between those areas. This prevents deterioration of air quality, such as an increase in carbon dioxide concentration due to insufficient ventilation in those areas.

[0015] A second characteristic feature of the present invention is that the set ventilation rate of the space to be ventilated is set to a ventilation rate corresponding to the number of people who will be occupying the main living room.

[0016] With this configuration, when the number of people in the main room corresponds to the room's occupancy, a ventilation rate corresponding to the room's occupancy is supplied to the main room. Furthermore, if some of the people in the main room move to a temporary room, relatively fresh air with a lower level of contamination is supplied from the main room to the temporary room in proportion to the number of people who moved there. This allows for a more appropriate distribution and supply of fresh air to these rooms, taking into account the movement of people between the main room and the temporary room.

[0017] As a result, while effectively reducing energy consumption in the ventilation system, it becomes possible to more appropriately distribute and supply fresh air to the main living area and the temporary living area, taking into account the movement of people between those areas, and to prevent deterioration of air quality, such as an increase in carbon dioxide concentration due to insufficient ventilation in those areas.

[0018] The third characteristic configuration of the present invention is that a ceiling exhaust chamber through which internal air is discharged by an exhaust fan is provided across the ceiling space of the main living room and the ceiling space of the temporary use living room. The ventilation fan is open to the ceiling exhaust chamber. The main living room is provided with a communication port communicating with the ceiling exhaust chamber. When the exhaust volume from the temporary use living room by the third type of ventilation is less than the exhaust volume corresponding to the set ventilation volume of the ventilation target space, the indoor air of the difference volume is discharged from the communication port of the main living room to the ceiling exhaust chamber.

[0019] According to this configuration, since the installation of an exhaust duct becomes unnecessary by providing a ceiling exhaust chamber, it is possible to reduce ductwork compared to the case of installing an exhaust duct.

[0020] And while reducing the ductwork in this way, when the exhaust volume from the temporary use living room by the third type of ventilation is less than the exhaust volume corresponding to the set ventilation volume of the ventilation target space, the indoor air of the difference volume is discharged from the communication port of the main living room to the ceiling exhaust chamber, so that the air balance between air supply and exhaust in ventilation can be appropriately adjusted.

Brief Description of the Drawings

[0021] [Figure 1] Schematic vertical cross-sectional view of the main part showing the configuration of the ventilation system [Figure 2] Schematic horizontal cross-sectional view of the main part showing the configuration of the ventilation system

Modes for Carrying Out the Invention

[0022] Hereinafter, an embodiment of the ventilation system according to the present invention will be described based on the drawings. As shown in Figures 1 and 2, the ventilation system 1 illustrated in this embodiment ventilates an office space S, such as an office building or tenant building, which is an example of a space to be ventilated. This office space S is partitioned into a predetermined number of offices S1 (one in this embodiment), which are an example of a main office, and a predetermined number of conference rooms S2 (five in this embodiment), which are an example of temporary offices connected to the offices S1. Furthermore, the offices S1 illustrated in this embodiment have a set ventilation rate of 1000 CMH (m³) based on their occupancy. 3 The large room is set to a ventilation rate of 100 CMH, while each conference room S2 is a small room with a set ventilation rate of 100 CMH based on its capacity.

[0023] Furthermore, the ventilation target space S of ventilation system 1 may be other than the office space S, such as a nursing home or dormitory where private rooms (e.g., main rooms for residents or guests) and temporary rooms (e.g., dining rooms or lounges) are partitioned off. In addition, the number and size of main rooms and temporary rooms in the ventilation target space S can be changed in various ways.

[0024] The ventilation system 1 is configured to perform Type 1 ventilation for the office S1 through forced supply and exhaust, and Type 3 ventilation for each conference room S2 by creating negative pressure (negative pressure) in those rooms through forced exhaust, thereby drawing in internal air from the office S1 through the communication section 2 that connects to the office S1 and supplying it as fresh air. Furthermore, the connecting section 2 may be a louver provided in the partition wall 3 or door 4 (see Figure 2), or it may be a gap formed between door 4 (see Figure 2) and the floor surface 5 (see Figure 1).

[0025] The ventilation system 1 includes an air supply fan 7 (see Figure 1) that supplies outside air OA as supply air SA to the office space S1 of the office area S through an air supply passage 6, an exhaust fan 9 (see Figure 1) that discharges the internal air of the office area S to the outside through an exhaust passage 8 (see Figure 1), a total heat exchanger 10 that performs heat exchange between the supply air SA to the office space S1 and the exhaust air EA from the office area S, and a plurality of communication ports 11 that connect the office space S1 to the exhaust passage 8. Furthermore, the ventilation system 1 includes a ventilation fan 12 provided in each conference room S2 that discharges the internal air of each conference room S2 as exhaust air EA to the exhaust passage 8, a human presence sensor 13 provided in each conference room S2 that detects whether or not there is an occupant in each conference room S2, and a control unit 14 (see Figure 1) that controls the operation of each fan 7, 9, 12, etc.

[0026] The air supply passage 6 is formed by an air supply duct 16 installed from the air supply fan 7 to a plurality of air supply openings 15 provided in the office S1. The exhaust passage 8 is formed by a ceiling exhaust chamber 17 (see Figure 1) from which internal air is discharged by an exhaust fan 9. The ceiling exhaust chamber 17 is provided in the space above the ceiling of the office S1 and the space above the ceiling of the conference room S2. The office S1 is provided with a communication opening 11 that communicates with the ceiling exhaust chamber 17, and the ventilation fans 12 of each conference room S2 are open to the ceiling exhaust chamber 17. The control unit 14 is configured to activate the ventilation fan 12 of the conference room S2 in which the presence of a person is detected by any of the motion sensors 13, and then to stop the operation of the ventilation fan 12 of that conference room S2 when the presence of a person is no longer detected by the motion sensor 13 of that conference room S2.

[0027] In other words, the ventilation system 1 illustrated in this embodiment is configured such that in the office S1, a first-type ventilation is performed by forced supply and exhaust of air by operating the supply fan 7 and the exhaust fan 9 under the control operation of the control unit 14, and in each conference room S2, when any of the human presence sensors 13 installed in the conference room S2 detects the presence of a person, the control unit 14 operates the ventilation fan 12 of the conference room S2 where the presence of a person has been detected under the control operation of the control unit 14 based on the detection information, forcibly exhausting the internal air while simultaneously drawing in and supplying the internal air from the office S1 to the conference room S2, thereby performing a third-type ventilation.

[0028] By the way, in the case of an office space S as illustrated in this embodiment, where the office space S is partitioned into an office S1 and multiple meeting rooms S2, fluctuations in the number of people in the office S1 and each meeting room S2 within the office space S are mainly due to the movement of personnel from the office S1 between the office S1 and each meeting room S2, resulting in a mutually exclusive increase or decrease in the number of people in the office S1 and each meeting room S2. It is considered that the number of people in each of the office S1 and each meeting room S2 will never reach their respective capacity.

[0029] Therefore, in the office space S illustrated in this embodiment, if the set ventilation rate for the office space S is set to the ventilation rate corresponding to the formal total occupancy of the office space S (the ventilation rate corresponding to the total occupancy of the office space S, which is the sum of the occupancy rates set for each room, such as the office S1 and each conference room S2, and in this embodiment this is 1500 CMH), then in this office space S, even though the number of people in the office space S never reaches the formal total occupancy, ventilation is always performed at the ventilation rate corresponding to the formal total occupancy, resulting in waste. Thus, there is room for improvement in terms of energy saving of the ventilation system 1.

[0030] Therefore, taking this point into consideration, in the ventilation system 1 illustrated in this embodiment, the set ventilation rate for the office space S is set lower than the ventilation rate corresponding to the total capacity of the office space S, which is the sum of the capacity set for each room, the office S1 and each conference room S2 (1500 CMH in this embodiment). Specifically, the set ventilation rate for the office space S is set to the ventilation rate corresponding to the capacity of the office S1 (1000 CMH in this embodiment). Furthermore, if the exhaust volume from conference room S2 by the third-type ventilation is less than the exhaust volume corresponding to the set ventilation rate for the office space S, the difference in indoor air is configured to be discharged from the communication port 11 of the office S1 to the ceiling exhaust chamber 17.

[0031] As a result, for example, if the set ventilation rate for office space S is set to 1000 CMH, and as shown in Figure 1, two of the five conference rooms S2, each with a set ventilation rate of 100 CMH, are in use, the exhaust volume from the conference rooms S2 in use by the third-type ventilation will be 200 CMH. The difference between this and the exhaust volume corresponding to the set ventilation rate for office space S will be 800 CMH, so 800 CMH of indoor air will be discharged from the communication opening 11 of the office S1 into the ceiling exhaust chamber 17.

[0032] With the above configuration, in the ventilation system 1 illustrated in this embodiment, the office space S is ventilated with a set ventilation rate that corresponds to the number of people who will be occupying the office space S1. Therefore, compared to the case where ventilation is performed with a ventilation rate that corresponds to the formal total number of people who will be occupying the office space S, the ventilation system 1 can be made more energy-efficient.

[0033] Furthermore, regardless of the number of people in office S1, outside air OA based on the aforementioned set ventilation rate is always supplied to office S1 by the supply air fan 7. Therefore, when the number of people in office S1 corresponds to the number of people that can be accommodated in office S1, the ventilation rate corresponding to the number of people in office S1 is supplied to office S1. In addition, if some of the people in office S1 move to one of the conference rooms S2, the motion sensor 13 in the conference room S2 to which the people have moved detects the presence of people, and based on this detection, the control unit 14 operates, causing the ventilation fan 12 in that conference room S2 to operate and perform type 3 ventilation by the ventilation fan 12, thereby drawing the internal air of office S1 into conference room S2 as supply air SA. Furthermore, the internal air from office S1 that is drawn into conference room S2 at this time becomes less contaminated in proportion to the number of people who move into conference room S2. Therefore, the more people who move into conference room S2, the more fresh and less contaminated air will be supplied to conference room S2 from office S1.

[0034] In other words, the set ventilation volume of outside air (fresh air) OA supplied to the office S1 by the supply fan 7 can be appropriately distributed and supplied from the office S1 to each conference room S2 in accordance with the movement of people between the office S1 and each conference room S2 in the office space S. Furthermore, since the freshness of the air can be distributed and supplied from the office S1 to each conference room S2 according to the number of people moving between the office S1 and each conference room S2, even if the set ventilation volume of the office space S is set to a ventilation volume corresponding to the number of people who will be occupying the office S1, it is possible to prevent deterioration of air quality, such as an increase in carbon dioxide concentration due to insufficient ventilation, in either the office S1 or each conference room S2.

[0035] As a result, while saving energy in the ventilation system 1, it becomes possible to appropriately distribute and supply fresh air to the offices S1 and conference rooms S2, taking into account the movement of people between them, and to prevent deterioration of air quality, such as an increase in carbon dioxide concentration due to insufficient ventilation in those rooms S1 and S2.

[0036] Furthermore, in the ventilation system 1 illustrated in this embodiment, since the exhaust passage 8 is formed in the ceiling exhaust chamber 17, the installation of exhaust ducts becomes unnecessary, thus reducing ductwork compared to the case where exhaust ducts are installed.

[0037] Furthermore, while reducing ductwork in this way, if the exhaust volume from conference room S2 by type 3 ventilation is less than the exhaust volume corresponding to the set ventilation volume of office space S, the difference in indoor air is discharged as exhaust EA from the communication opening 11 of the office S1 to the ceiling exhaust chamber 17, thereby enabling proper air balance between supply air SA and exhaust air EA in ventilation.

[0038] [Another embodiment] Another embodiment of the present invention will be described. Furthermore, the configurations of each of the other embodiments described below are not limited to being applied individually, but can also be applied in combination with the above-described embodiments or other configurations.

[0039] (1) In the above embodiment, the ventilation system 1 is exemplified by setting the set ventilation rate of the office space (space to be ventilated) S to a ventilation rate corresponding to the number of people who will be working in the office (main room) S1. However, it is not limited to this, and for example, the set ventilation rate of the office space (space to be ventilated) S may be set higher than the ventilation rate corresponding to the number of people who will be working in the office (main room) S1, as long as it is set lower than the ventilation rate corresponding to the total number of people who will be working in the office space (space to be ventilated) S, which is the sum of the number of people who will be working in the office (main room) S1 and the conference room (temporary use room) S2.

[0040] (2) In the above embodiment, the ventilation system 1 is exemplified in which the exhaust passage 8 is formed in a ceiling exhaust chamber 17. However, it is not limited to this, and for example, the exhaust passage 8 may be formed by an exhaust duct installed in the ceiling space extending from the ceiling space of the office (main room) S1 to the ceiling space of the conference room (temporary room) S2. In this case, the exhaust duct is connected to the exhaust fan 9 in such a way that the communication opening 11 of the office (main room) S1 is connected to its internal space and the ventilation fans 12 of each conference room (temporary room) S2 are opened. [Explanation of Symbols]

[0041] 1. Ventilation System 7. Intake fan 9. Exhaust fan 11 connecting ports 12 Ventilation fan 13 motion sensors 17. Ceiling exhaust chamber OA outside air S Office space (space to be ventilated) S1 Office (Master's Room) S2 Meeting Room (Temporary Use Room)

Claims

1. A ventilation system for ventilating a space partitioned off from a main living room and a temporary living room connected to the main living room, The main living room is supplied with outside air by an air supply fan. In the aforementioned temporary occupancy room, a ventilation fan for exhausting the internal air of the room and a motion sensor are provided, and the room is configured to perform type 3 ventilation by the ventilation fan when the motion sensor detects the presence of a person. A ventilation system in which the set ventilation rate for the space to be ventilated is set to be equal to or greater than the ventilation rate corresponding to the number of occupants of the main room, and lower than the ventilation rate corresponding to the total number of occupants of the space to be ventilated, which is the sum of the occupants set for each room, namely the main room and the temporary use room.

2. The ventilation system according to claim 1, wherein the set ventilation volume of the space to be ventilated is set to a ventilation volume corresponding to the number of people to be occupied in the main room.

3. An exhaust chamber is provided in the ceiling space above the main living room and above the ceiling space above the temporary living room, through which internal air is discharged by an exhaust fan. The ventilation fan is open to the ceiling exhaust chamber. The main living room is provided with a communication port that connects to the ceiling exhaust chamber. The ventilation system according to claim 1 or 2, wherein if the exhaust volume from the temporary-use room by the third type ventilation is less than the exhaust volume corresponding to the set ventilation volume of the space to be ventilated, the difference in amount of indoor air is discharged from the communication port of the main room into the ceiling exhaust chamber.

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