Natural ventilation notification system

Abstract

To provide a natural ventilation notification system which allows a person in a building to easily judge whether or not natural ventilation should be carried out.SOLUTION: The present invention is directed to a natural ventilation notification system 1 being characterized by having an outside air state detection unit 10, an inside air state detection unit 20, display units 30, 31 provided in a room 4 and capable of switching its state between a display state of prompting natural ventilation and a non-display state, and a control device 40 having a determination unit 41 for determining, on a real-time basis, whether or not natural ventilation is required, based on a detection result input from the outside air state detection unit 10 and a detection result input from the inside air state detection unit 20, and a display switching unit 42 for setting the display units 30, 31 to the non-display state if the determination unit 41 determines that the natural ventilation should not be carried out and for setting display units 30, 31 to the display state if the determination unit 41 determines that the natural ventilation should be carried out. After switching the display units 30, 31 from the non-display state to the display state, the control device 40 keeps the display units 30, 31 in the display state only for a predetermined maintenance period of time.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a natural ventilation notification system that notifies people in a building about whether or not natural ventilation is required. [Background technology]

[0002] Conventionally, in various buildings, such as small wooden offices and homes, where it is possible to naturally ventilate the room by opening windows and vents to take in outside air, it is known to provide a natural ventilation notification system that notifies occupants of the room whether natural ventilation is appropriate, and that is configured to display a message on a display such as a lamp installed in the room encouraging natural ventilation when it is determined that the indoor air can be made comfortable through natural ventilation based on a comparison between outdoor air conditions such as the outside temperature and humidity and indoor air conditions such as the indoor temperature and humidity (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-219124 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the conventional natural ventilation notification system is configured to judge in real time whether outdoor air conditions such as the outside temperature and humidity, and indoor air conditions such as the indoor temperature and humidity, meet specified conditions, and to display a message on the display unit encouraging natural ventilation when it is determined that the specified conditions are met.Therefore, when the outdoor air or indoor air conditions are close to the judgment criteria, depending on the situation, the display unit will repeatedly switch in a short period of time between a display state that displays a message encouraging natural ventilation and a non-display state that does not display the message, making it difficult for people in the room to judge whether natural ventilation is appropriate.

[0005] The present invention has been made in consideration of such problems, and its purpose is to provide a natural ventilation notification system that allows people in a building to easily determine whether or not natural ventilation is appropriate. [Means for solving the problem]

[0006] The natural ventilation notification system of the present invention is a natural ventilation notification system that notifies occupants in a room of a building whether or not natural ventilation should be performed, and comprises a control device including an outdoor air condition detection unit that detects the state of the outdoor air, an indoor air condition detection unit that detects the state of the air inside the room, a display unit that is provided in the room and can be switched between a display state that displays a message encouraging natural ventilation and a hidden state that does not display the message, a judgment unit that judges in real time whether or not natural ventilation should be performed based on the detection results input from the outdoor air condition detection unit and the detection results input from the indoor air condition detection unit, and a display switching unit that sets the display unit to the hidden state when the judgment unit determines that natural ventilation should not be performed, and sets the display unit to the display state when the judgment unit determines that natural ventilation should be performed, and is characterized in that the control device is configured to maintain the display unit in the display state for a predetermined maintenance time after switching the display unit from the hidden state to the display state.

[0007] In the natural ventilation notification system of the present invention, in the above configuration, it is preferable that the control device is configured to reset the count of the maintenance time when, during the maintenance time, the judgment unit determines that natural ventilation should not be performed and then determines again that natural ventilation should be performed.

[0008] In the natural ventilation notification system of the present invention, in the above configuration, it is preferable that the control device is configured to switch the display unit to the display state when the judgment unit judges that natural ventilation should be performed for a predetermined continuous period of time while the display unit is in the non-display state. Effect of the Invention

[0009] According to the present invention, a natural ventilation notification system can be provided that enables people in a building to easily determine whether or not natural ventilation is required. [Brief description of the drawings]

[0010] [Figure 1] 1 is a schematic cross-sectional view of a building provided with a natural ventilation notification system according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a schematic cross-sectional view of the building shown in FIG. 1 in a state where natural ventilation is being performed. [Diagram 3] FIG. 1 is a block diagram showing the configuration of a natural ventilation notification system according to an embodiment of the present invention. [Figure 4] FIG. 13 is a diagram for explaining the determination procedure of the natural ventilation notification system according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, a natural ventilation notification system according to one embodiment of the present invention will be described in detail with reference to the drawings.

[0012] The natural ventilation notification system 1 according to this embodiment notifies an occupant 4 in a room 3 of a building 2 of the propriety of natural ventilation, that is, whether or not natural ventilation should be performed.

[0013] The building 2 in which the natural ventilation notification system 1 is installed may be any type of building, such as a small wooden office or house, in which natural ventilation of the interior 3 is possible by opening windows 5, ventilation vents 6, etc. to bring in outside air into the interior 3.

[0014] In this embodiment, the building 2 is a small wooden office, and an openable / closable window 5 is provided in a wall 7, and an openable / closable ventilation opening 6 is provided in a roof 8. As shown in FIG. 1, when the window 5 and the ventilation opening 6 are closed, the room 3 is substantially isolated from the outside of the building 2, and the room 3 is not naturally ventilated by the outside air. On the other hand, as shown in FIG. 2, when the window 5 and the ventilation opening 6 are opened, the room 3 communicates with the outside of the building 2 through the window 5 and the ventilation opening 6, and is naturally ventilated by the outside air. That is, the occupant 4 can naturally ventilate the room 3 with the outside air by opening the window 5 and the ventilation opening 6.

[0015] The window 5 and the ventilation opening 6 may be configured to be opened and closed manually by the occupant 4, or may be configured to be opened and closed automatically when the occupant 4 operates an operating unit (not shown) provided separately from the window 5 and the ventilation opening 6.

[0016] As shown in FIG. 3, the natural ventilation notification system 1 according to this embodiment includes an outside air condition detection unit 10, an inside air condition detection unit 20, a display unit 30, and a control device 40.

[0017] The outside air condition detection unit 10 detects the state of the air outside the building 2, i.e., the outside air. As shown in Fig. 1, the outside air condition detection unit 10 is provided on an outward surface of a wall 7 of the building 2. In this embodiment, the outside air condition detection unit 10 includes an outside temperature gauge that detects the temperature of the outside air (outside air temperature), an outside air hygrometer that detects the humidity of the outside air, an outside air barometer that detects the pressure of the outside air (atmospheric pressure), and an outside air anemometer that detects the wind speed of the outside air.

[0018] Note that the outdoor air condition detection unit 10 is not limited to the four above-mentioned outdoor temperature meter, outdoor hygrometer, outdoor pressure meter, and outdoor anemometer, and may be of various configurations and combinations as long as it can detect the outdoor air condition that is the criterion for determining whether natural ventilation is required. Also, the outdoor air condition detection unit 10 is not limited to being installed on the outward surface of the wall 7, and can be installed in various positions, such as a stand (not shown) installed on the outside of the wall 7 or on the outward surface of the roof 8, as long as it is in a position where the outdoor air condition can be detected.

[0019] The inside air condition detection unit 20 detects the state of the air inside the room 3 of the building 2, i.e., the inside air. The inside air condition detection unit 20 is provided in the room 3 of the building 2. The installation location of the inside air condition detection unit 20 in the room 3 may be set appropriately. In this embodiment, the inside air condition detection unit 20 includes a room temperature meter that detects the room temperature, which is the temperature of the inside air in the room 3, an inside air hygrometer that detects the humidity of the inside air, and an inside air pressure meter that detects the pressure (atmospheric pressure) of the inside air.

[0020] In addition, the indoor air condition detection unit 20 is not limited to the above-mentioned three devices, a room temperature meter, an indoor hygrometer, and an indoor pressure meter, and may be of various configurations and combinations as long as it can detect the indoor air condition in the room 3, which is the criterion for determining whether or not natural ventilation is required.

[0021] A columnar stand 50 of a predetermined height is installed on the floor 9 of the room 3 of the building 2. This stand 50 is a switch stand on which an operation panel 60 of an air conditioner (not shown) is installed to condition the air in the room 3. In this embodiment, the inside air state detection unit 20 is installed next to the operation panel 60 on a front surface 50a of the stand 50.

[0022] The natural ventilation notification system 1 may be configured to include a rainfall sensor 11 that detects the presence or absence of rainfall, in addition to the outside air condition detection unit 10. In this embodiment, the rainfall sensor 11 is provided together with the outside air condition detection unit 10 on the outward surface of the wall 7 of the building 2.

[0023] The display unit 30 is provided inside the room 3, and can be switched between a display state in which a display is made to encourage natural ventilation and a non-display state in which the display is not made.

[0024] In this embodiment, the display unit 30 is a lamp 31 that is turned on in a display state in which a display encouraging natural ventilation is displayed and is turned off in a non-display state. By using the lamp 31 as the display unit 30, it is possible to effectively notify the occupants 4 of the display encouraging natural ventilation with a simple configuration.

[0025] In this embodiment, the lamp 31 which is the display unit 30 is arranged next to the operation panel 60 on the front surface 50 a of the stand 50 .

[0026] The occupants 4 in the room 3 can recognize that the room 3 should be naturally ventilated when the lamp 31 installed on the stand 50 turns on. The occupants 4 in the room 3 can recognize that the room 3 should not be naturally ventilated when the lamp 31 installed on the stand 50 turns off. In other words, the occupants 4 in the room 3 can determine whether or not to naturally ventilate the room 3 by recognizing the state of the lamp 31, which is the display unit 30.

[0027] The display unit 30 is not limited to the lamp 31 described above, and may be of various types, as long as it can be switched between a display state in which a display encouraging natural ventilation is displayed and a non-display state in which no display is displayed, for example, a display that displays a sign encouraging natural ventilation when the room 3 should be naturally ventilated and does not display the sign when the room 3 should not be naturally ventilated. The display unit 30 is not limited to being installed on the stand 50, and may be installed in other locations in the room 3, such as the inner surface of the wall 7, as long as it is visible to the occupants 4.

[0028] A control panel 51 is provided in the room 3 of the building 2, and the control device 40 is installed inside the control panel 51. Note that the installation location of the control device 40 is not limited to inside the control panel 51, and can be changed in various ways.

[0029] 3, the control device 40 has a determination unit 41 and a display switching unit 42. Although details are not shown, the control device 40 is configured as a microcomputer equipped with a CPU (Central Processing Unit) and a storage unit (memory) for storing a control program, etc., and the determination unit 41 and the display switching unit 42 are each configured as a function of the CPU.

[0030] The judgment unit 41 judges in real time whether natural ventilation is required based on the detection results input from the outside air condition detection unit 10 and the inside air condition detection unit 20. The judgment in real time by the judgment unit 41 means that the judgment is made at every predetermined judgment time corresponding to the instruction execution cycle when the CPU of the control device 40 makes the above judgment. The predetermined judgment time is an extremely short time of less than one second.

[0031] In this embodiment, the judgment unit 41 is configured to judge that natural ventilation should be performed when all five conditions based on the detection results input from the outside air condition detection unit 10 and the detection results input from the inside air condition detection unit 20 are satisfied, and to judge that natural ventilation should not be performed when at least one of the five conditions is not satisfied. Here, the five conditions set in this embodiment are as follows.

[0032] Condition 1: The outside air temperature detected by the outside air condition detection unit 10 is equal to or higher than 15°C and lower than 26°C. Condition 2: The value of the outside air enthalpy calculated based on the detection result of the outside air condition detection unit 10 is equal to or less than the value of the inside air enthalpy calculated based on the detection result of the inside air condition detection unit 20. Condition 3: The outside air temperature detected by the outside air condition detection unit 10 is equal to or lower than a preset upper limit dew point temperature of the outside air (for example, 19° C.). Condition 4: The value of the wind speed of the outside air detected by the outside air condition detection unit 10 is equal to or lower than a preset upper limit wind speed value of the outside air (for example, 1.2 m / s). Condition 5: No rain is detected by the rain sensor 11.

[0033] The determining unit 41 makes a determination based on the above five conditions, thereby making it possible to accurately determine whether or not natural ventilation is required.

[0034] The judgment by the judgment unit 41 as to whether or not natural ventilation should be performed is not limited to being based on the above five conditions, but may be based on other conditions, for example, by only comparing the outside air temperature with the room temperature, and the number of conditions is not limited to five.

[0035] The display switching unit 42 switches the states of the display unit 30 and the lamp 31 so that, when the judgment unit 41 judges that natural ventilation should not be performed, the display unit 30 is in a non-display state, i.e., the lamp 31 is turned off, and, when the judgment unit 41 judges that natural ventilation should be performed, the display switching unit 42 switches the states of the display unit 30 and the lamp 31 so that the display unit 30 is in a display state, i.e., the lamp 31 is turned on. This switching is performed immediately after the judgment by the judgment unit 41 by sending a command signal from the display switching unit 42 to the display unit 30 and the lamp 31.

[0036] In the natural ventilation notification system 1 having the above configuration, when the outdoor air and indoor air conditions become suitable for natural ventilation, i.e., when the above five conditions are satisfied, the judgment unit 41 judges that natural ventilation should be performed based on the detection results input from the outdoor air condition detection unit 10 and the detection results input from the indoor air condition detection unit 20, and the display switching unit 42 switches to a display state in which the lamp 31 of the display unit 30 is turned on. On the other hand, when the outdoor air and indoor air conditions become unsuitable for natural ventilation, i.e., when at least one of the above five conditions is not satisfied, the judgment unit 41 judges that natural ventilation should not be performed based on the detection results input from the outdoor air condition detection unit 10 and the detection results input from the indoor air condition detection unit 20, and the display switching unit 42 switches to a non-display state in which the lamp 31 of the display unit 30 is turned off. Therefore, the occupant 4 in the room 3 can judge whether natural ventilation should be performed based on the lighting of the lamp 31, and when the lamp 31 is turned on, the person 4 in the room 3 can manually open the window 5 or the ventilation opening 6 to perform natural ventilation of the room 3. Furthermore, since an operation panel 60 for an air conditioner (not shown) is provided on the stand 50 on which the lamp 31 is installed, the occupants 4 can operate the operation panel 60 to stop the operation of the air conditioner (not shown) when natural ventilation is to be performed. In this way, the natural ventilation notification system 1 according to this embodiment can foster an awareness of energy conservation among the occupants 4 by notifying them of the propriety of natural ventilation.

[0037] In this embodiment, the rainfall sensor 11 is provided, so that it is possible to prevent rainwater from entering the room 3 due to unexpected natural ventilation when it is raining.

[0038] Here, the judgment unit 41 judges in real time whether or not the above five conditions are met. Therefore, if the state of the outside air or inside air is close to the judgment criteria for the above conditions, depending on the situation, the lamp 31 may repeatedly switch between being on and off in a short period of time (at each of the above judgment times), which may make it difficult for the occupants 4 to judge whether natural ventilation is required.

[0039] Therefore, in the natural ventilation notification system 1 of this embodiment, the control device 40 is configured to switch the lamp 31, which is the display unit 30, from an off state (non-display state) to a lit state (display state), and then maintain the lamp 31 in the lit state (display state) for a predetermined maintenance time.

[0040] 4, when the lamp 31 is in an off state (the display unit 30 is in a non-display state), the judgment unit 41 performs a lighting condition judgment, and if the above five conditions are satisfied in the lighting condition judgment and the judgment unit 41 judges that natural ventilation should be performed, the display switching unit 42 switches the lamp 31 to a lit state. Then, when the lamp 31 is switched from an off state to a lit state, the lamp 31 is maintained in the lit state for at least a predetermined maintenance time after the switching, i.e., in the off condition judgment, regardless of the judgment of the judgment unit 41.

[0041] In this way, according to the natural ventilation notification system 1 of this embodiment, once the lamp 31 is turned on, the lamp 31 is maintained in the on state for at least the predetermined maintenance time regardless of the judgment of the judgment unit 41. Therefore, the lamp 31 encouraging natural ventilation is not repeatedly switched between the on state and the off state in a short period of time but remains on for the predetermined maintenance time, so that the occupants 4 can easily judge the propriety of natural ventilation from the state of the lamp 31.

[0042] Here, the predetermined maintenance time during which lamp 31 is maintained in the lit state is longer than the predetermined judgment time corresponding to the command execution cycle during which judgment unit 41 makes a real-time judgment.

[0043] The predetermined maintenance time is preferably set in the range of 5 to 10 minutes. In this embodiment, the predetermined maintenance time is 5 minutes. If the predetermined maintenance time is less than 5 minutes, the above-mentioned problem of the lamp 31 repeatedly switching between the on state and the off state in a short time cannot be sufficiently solved. On the other hand, if the predetermined maintenance time is longer than 10 minutes, the cycle of determination by the determination unit 41 becomes too long, and there is a risk that the accuracy of the natural ventilation notification system 1 notifying the occupants 4 of the propriety of natural ventilation will decrease. In contrast, by setting the predetermined maintenance time in the range of 5 to 10 minutes, the occupants 4 can accurately and easily determine the propriety of natural ventilation.

[0044] The predetermined maintenance time may be any time longer than the predetermined judgment time corresponding to the instruction execution cycle in which the judgment unit 41 performs real-time judgment, and is not limited to the range of 5 to 10 minutes.

[0045] The natural ventilation notification system 1 of this embodiment can also be configured so that the control device 40 resets the count of the specified maintenance time when the judgment unit 41 determines during the above-mentioned specified maintenance time that natural ventilation should not be performed and then determines again that natural ventilation should be performed.

[0046] That is, as shown in Fig. 4, in the light-off condition judgment in which lamp 31 is turned on once and then kept on for a predetermined maintenance time, if judgment unit 41 judges that natural ventilation should not be performed and then judges that natural ventilation should be performed again, the count of the predetermined maintenance time is reset, and the count of the predetermined maintenance time is started from the time when judgment unit 41 judges that natural ventilation should be performed again. Then, lamp 31 is maintained in the lit state for the predetermined maintenance time for which counting has been started again.

[0047] With this configuration, when the outside air or inside air condition is close to the criteria for judging the above conditions, the lamp 31 is not turned off unnecessarily but remains lit for a longer period of time, allowing the occupants 4 to easily judge whether or not natural ventilation is required.

[0048] It should be noted that if, during the specified maintenance time when counting has started again as described above, the judgment unit 41 again judges that natural ventilation should not be performed, and then again judges that natural ventilation should be performed, the same procedure as described above is repeated.

[0049] In contrast, if the determination unit 41 repeatedly determines that natural ventilation should be performed for a predetermined maintenance time after the lamp 31 is turned on, the maintenance of the illumination of the lamp 31 is released after the predetermined maintenance time has elapsed, and the lamp 31 is turned on or off according to the determination of the determination unit 41. For example, after the maintenance of the illumination of the lamp 31 is released after the predetermined maintenance time has elapsed, the lamp 31 is maintained in the illuminated state while the determination unit 41 determines that natural ventilation should be performed. On the other hand, if the determination unit 41 determines that natural ventilation should not be performed after the maintenance of the illumination of the lamp 31 is released after the predetermined maintenance time has elapsed, the display switching unit 42 turns off the lamp 31.

[0050] The natural ventilation notification system 1 of this embodiment can also be configured so that when the display unit 30 is in a hidden state and the judgment unit 41 determines that natural ventilation should be performed continuously for a predetermined period of time, the control device 40 switches the display unit 30 to a displayed state.

[0051] That is, in this embodiment, even if the judgment unit 41 judges that natural ventilation should be performed when the display unit 30 is in a non-display state, the control device 40 is configured not to turn on the lamp 31 immediately after the judgment, but to turn on the lamp 31 when the judgment is made continuously for a predetermined period of time in the lighting condition judgment, as shown in Figure 4.

[0052] With this configuration, even when the lamp 31 is off and the outside air or inside air condition is close to the judgment criteria for the above conditions, the lamp 31 will not be repeatedly switched between on and off in a short period of time, but will remain off continuously, allowing the occupants 4 to easily decide whether or not to use natural ventilation.

[0053] Like the above-mentioned predetermined maintenance time, this predetermined time is preferably set in the range of 5 to 10 minutes. In this embodiment, the predetermined time is 5 minutes. If the predetermined time is less than 5 minutes, the lamp 31 is repeatedly switched between on and off in a short time, making it difficult for the occupants 4 to easily determine whether natural ventilation should be performed. On the other hand, if the predetermined time is longer than 10 minutes, the cycle of determination by the determination unit 41 becomes too long, and there is a risk that the accuracy of the natural ventilation notification system 1 notifying the occupants 4 of the necessity of natural ventilation will decrease. In contrast, by setting the predetermined time in the range of 5 to 10 minutes, the occupants 4 can easily and accurately determine whether natural ventilation should be performed.

[0054] Like the predetermined maintenance time, this predetermined time need only be longer than the predetermined judgment time corresponding to the instruction execution cycle in which the judgment unit 41 makes a real-time judgment, and is not limited to the range of 5 to 10 minutes.

[0055] The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit and scope of the present invention.

[0056] For example, the lamp 31 serving as the display unit 30 may be a light-emitting sign that emits light in a shape that evokes natural ventilation when lit.

[0057] Further, the stand 50 may be provided with an opening / closing switch (not shown) for automatically opening and closing the ventilation opening 6. [Explanation of symbols]

[0058] 1. Natural ventilation notification system 2. Building 3 indoors 4 People in the room 5. Windows 6 Ventilation vent 7. Wall 8. Roof 9 Beds 10. Outside air condition detector 11 Rainfall sensor 20 Inside air condition detector 30 Display section 31 Lamp 40 Control device 41 Judgment section 42 Display switching section 50 Stand 50a front 51 Control Panel 60 Operation Panel

Claims

1. A natural ventilation notification system that notifies people in a building whether natural ventilation is required, an outside air condition detection unit that detects the state of outside air; an indoor air condition detection unit that detects the indoor air condition; A display unit that is provided in the room and can be switched between a display state that displays a message encouraging natural ventilation and a non-display state that does not display the message; a control device including a judgment unit that judges in real time whether natural ventilation should be performed based on the detection result input from the outside air condition detection unit and the detection result input from the inside air condition detection unit, and a display switching unit that sets the display unit to the non-display state when the judgment unit judges that natural ventilation should not be performed, and sets the display unit to the display state when the judgment unit judges that natural ventilation should be performed, A natural ventilation notification system characterized in that the control device is configured to maintain the display unit in the display state for a predetermined maintenance time after switching the display unit from the non-display state to the display state.

2. The natural ventilation notification system of claim 1, wherein the control device is configured to reset the count of the maintenance time when, during the maintenance time, the judgment unit determines that natural ventilation should not be performed and then determines again that natural ventilation should be performed.

3. The natural ventilation notification system of claim 1 or 2, wherein the control device is configured to switch the display unit to the display state when the judgment unit determines that natural ventilation should be performed for a predetermined continuous period of time while the display unit is in the non-display state.

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