Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F11/00—Control or safety arrangements
  • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
  • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
  • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
  • F24F11/75—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity for maintaining constant air flow rate or air velocity
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F2110/00—Control inputs relating to air properties
  • F24F2110/40—Pressure, e.g. wind pressure

Definitions

• the present invention relates to a ventilation system provided with one or more suction grills attached to a building and in communication with one or more living rooms, an exhaust port, and a fan.
• a blower in a ventilation system of this type, a blower, an air intake for taking in a room of one or more rooms, an exhaust for exhausting to the outside air, and a pressure measurement device inside the exhaust.
• the system has a structure in which the exhaust air flow rate is controlled at a constant level by the value measured by the pressure measuring device (for example, see Patent Document 1).
• the air conditioning system which is a conventional ventilation system, is installed, for example, on the back of the ceiling 113, and the first intake duct connection port 102 provided on the side of the ventilation system main body 101 is a first intake duct (not shown). ), For example, in communication with the first air inlet (not shown) installed mainly on the ceiling of the dressing room. Further, the second intake duct connection port 103 provided on the side of the apparatus main body 101 is, for example, a second intake port (not shown) installed mainly on the ceiling of the toilet through a second intake duct (not shown). It is in communication.
• the ventilation system main body 101 is provided with a first fan 106 including a first fan 104 and a first motor 105.
• air is taken in from the first air intake and the second air intake, and air is also taken in from the air intake 108 provided on the decorative panel 107 on the lower surface of the main body 101, and the exhaust provided on the side of the main body 101.
• Exhaust air is provided to the wall surface of the living room through the exhaust duct 110 communicating with the exhaust duct connection port 109 via the duct connection port 109 and exhausted to the outside air from the exhaust port which is open / closed.
• an outside air suction port (not shown) (provided as many as necessary) is provided on the wall surface of the living room, and the outside air is sucked into the living room and exhausted to the outside air.
• a pressure sensor 111 is provided in the exhaust duct connection port 109, and is connected to the control unit 112 by a signal line (not shown) to measure the pressure loss at the time of exhaust with this pressure sensor 111. be able to.
• the control unit 112 connected to the pressure sensor 111 makes the wind constant.
• the control unit 112 can control the first fan 106 according to the path pressure loss of the duct, and the required ventilation air volume can be ventilated uniformly. Met.
• the pressure sensor measures the pressure loss at the time of exhaust, and the control unit operates the blower so that a constant air flow can be generated according to the pressure loss in the passage of the duct.
• the air volume control is constant.
• pressure sensors are generally measured based on atmospheric pressure, they change depending on the location of the pressure sensor (for example, the first and second floors of a building) and the weather of the day (for example, high pressure and low pressure).
• the path pressure loss outside the Da can not be measured accurately, and therefore the air volume can not be controlled at a constant level.
• Patent Document 1 Japanese Patent Application Laid-Open No. 2003-269781 Official gazette
• the present invention solves such conventional problems, and can accurately measure the path pressure loss of the duct which does not depend on the installation location of the sensor and the weather of the day.
• Provide a ventilation system that can ensure the ventilation air flow required by the designer of the room without being influenced by the length of the duct or the number of bends of the duct.
• the ventilating system of the present invention focuses on general ventilation of the entire living room, and the duct controls the air flow at a constant level under any installation condition.
• the ventilation system of the present invention comprises a fan for evacuating dirty air, a suction grille for sucking in a room of one or more rooms, an exhaust port for exhausting to the outside air, an exhaust port and an external side.
• a ventilation system that has an exhaust duct connection port for communicating air and a control unit that controls a fan etc.
• a differential pressure measurement device is installed at the exhaust duct connection port, and the exhaust air volume is measured according to the value measured by the differential pressure measurement device. Control the
• the ventilation system of the present invention it is possible to accurately measure the path pressure loss of the duct, so the designer of the room and the contractor care about the influence of the outside length and the piping. It can be designed and constructed without exception. Furthermore, since the number of times of ventilation can be assuredly ensured, and noise from the blower can be reduced and power consumption can be reduced from the viewpoint of not performing ventilation more than necessary, providing environmentally friendly products. be able to. Brief description of the drawings
• FIG. 1 is an attachment state diagram of a ventilation system according to a first embodiment of the present invention.
• FIG. 2 is a mounting diagram showing the same ventilation system mounted on a ceiling.
• FIG. 3 is a flowchart showing the operation of the ventilation system.
• FIG. 4 is an installation state diagram of a ventilation system of a second embodiment of the present invention.
• FIG. 5 is a flow chart showing the operation of the ventilation system.
• FIG. 6 is a cross-sectional view of an exhaust duct port according to Embodiment 3 of the present invention.
• FIG. 7 is a mounting diagram showing a state where the ventilation system of Embodiment 4 of the present invention is mounted on a ceiling.
• FIG. 8 is a flow chart showing the operation of the ventilation system.
• FIG. 9 is a mounting diagram showing a state where the ventilation system of Embodiment 5 of the present invention is attached to the ceiling of a bathroom.
• FIG. 10 is a block diagram showing a conventional ventilation system.
• the ventilating system of the present invention comprises a fan for evacuating dirty air, and an air intake chamber for at least one room.
• An exhaust duct is provided with a ventilation system including a suction grille for exhausting, an exhaust port for exhausting to the outside air, an exhaust duct connection port for connecting the exhaust port and the outside air, and a control unit for controlling a fan and the like.
• a differential pressure measurement device is installed at the connection port, and the exhaust air flow rate is controlled at a constant level based on the value measured by the differential pressure measurement device. In this way, the path pressure loss of the duct can be accurately measured, so that the designer and the contractor in the room can design and construct without considering the influence of the outside length and piping.
• the ventilation frequency can be secured reliably.
• the ventilation system of the present invention is characterized in that the motor for driving the fan is a DC motor. This makes it possible to improve the output efficiency, thereby reducing power consumption.
• the ventilation system according to the present invention is characterized by comprising a temperature measurement device, and correcting the value measured by the differential pressure measurement device based on the value measured by the temperature measurement device. In this way, the impact of environmental changes can be prevented, and ventilation can be reliably ensured regardless of environmental changes.
• the ventilation system of the present invention is characterized in that the duct connection port is provided with a throttle.
• the differential pressure value can be output more accurately by inserting the throttle, and the path pressure loss of the duct can be accurately measured. Therefore, the designer and the contractor can design and construct without worrying about the length of the da and the influence of piping, and the number of times of ventilation can be ensured.
• the ventilation system of the present invention is characterized in that an orifice is provided inside the exhaust duct connection port.
• an orifice is provided inside the exhaust duct connection port.
• the ventilation system according to the present invention is characterized in that the outlet of the differential pressure measurement device is provided on the wall surface inside the exhaust duct connection port.
• the outlet of the differential pressure measuring device is provided on the inner wall surface of the exhaust duct connection port.
• the ventilation system of the present invention is characterized in that the exhaust port is provided with a filter.
• the filter By providing the filter, it is possible to prevent the influence of the turbulent flow of the fan, to more accurately output the differential pressure value, and to accurately measure the path pressure loss of the duct. Therefore, the designer and the contractor can design and install without worrying about the effects of the duct length and piping, and the number of ventilations can be ensured.
• the ventilation system according to the present invention is characterized by including a window opening / closing detection unit, and controlling the fan according to the opening / closing state of the window detected by the window opening / closing detection unit. Power consumption can be reduced by operating and stopping the fan while the window is open and closed.
• the ventilation system of the present invention is characterized in that the fan is stopped only when the open state of the window detected by the window opening / closing detection unit continues for a certain period of time. This makes it possible to prevent fan chattering and prolong the service life.
• the ventilation system of the present invention is characterized in that the suction grille is provided with a human feeling measurement device, and the fan is operated while it is judged that the human feeling measurement device is detecting a human body. .
• the suction grille is provided with a human feeling measurement device, and the fan is operated while it is judged that the human feeling measurement device is detecting a human body.
• an indoor temperature measuring device and an outdoor temperature measuring device are provided, and the fan is controlled according to the difference between the temperature detected by the indoor temperature measuring device and the outdoor temperature measuring device. It features. As a result, since natural ventilation frequency can be expected in winter and so on, the fan's ability can be reduced and power consumption can be reduced.
• the ventilation system of the present invention is characterized in that the exhaust duct connection port is attached to another duct connection port of the same diameter.
• the differential pressure value can be output more accurately by preventing the influence of air turbulence caused by the fan, and the path pressure loss of the duct can be accurately measured. Therefore, the designer and the contractor can design and construct without worrying about the length of the da and the influence of piping, and the number of times of ventilation can be ensured.
• the ventilation system of the present invention is characterized by having a heating function.
• the room such as the bathroom can be warmed, the user can perform heating and drying of clothes.
• the ventilation system of the present invention includes a go out input unit for inputting go out information, and outputs an alarm when it is determined that the window is opened and closed when the go out information is input to the go out input unit. It is characterized by Since an alarm can be output, the user can be notified of a dangerous condition.
• the ventilation system of the present invention is characterized by including a pressure measurement device as an input means for going out. If the window opens and closes, the pressure measuring device outputs an alarm, which can notify the user of a dangerous condition.
• a ventilation device provided on a ceiling in a building having a plurality of rooms such as a living room will be described.
• FIG. 1 is a mounting state diagram of a ventilation system according to a first embodiment of the present invention
• FIG. 2 is a mounting drawing showing a state where the ventilation system is mounted on a ceiling.
• the ventilation system is installed, for example, on the ceiling 3 of the stairhole 2 of the house 1.
• the first suction duct connection port 5 provided on the side surface of the main body 4 communicates with the first suction grill 7 installed on the ceiling surface of the living room 6 through the first suction duct 51.
• the second suction duct connection port 11 provided on the side surface of the main body 4 communicates with the second suction grill 10 installed on the ceiling surface of the living room 9 through the second suction duct 111.
• the third suction duct connection port 8 provided on the side surface of the main body 4 communicates with the third suction grill 13 installed on the ceiling surface of the toilet 12 through the third suction duct 81.
• the main unit 4 is equipped with a fan 14 and a ventilating device that can also be a motor 15 (for example, high-pressure DC motor), and sucks room air from each of the suction grills 7, 10 and 13 and is provided in the louver 16 on the lower surface of the main unit 4. Indoor air is also drawn from the suction port 17. Further, the air is exhausted from the exhaust port 20 provided on the wall surface of the room to the outside air through the exhaust duct 19 communicating with the exhaust duct connection port 18 via the exhaust duct connection port 18 provided on the side surface of the main body 4. On the wall of the room, there is a natural air intake 21 (this natural air intake will be installed as many as the number of rooms to be evacuated) that takes in the air of the outside air.
• a natural air intake 21 this natural air intake will be installed as many as the number of rooms to be evacuated
• the HIGH side pressure introduction port 23 (for example, silicon tube) from the differential pressure sensor 22 which is a differential pressure measurement device installed in the main body 4 is installed in front of the aperture 26 of the exhaust duct connection port 18 and the LOW side pressure introduction port 24 (For example, a silicon tube) is provided behind the throttle 26 of the exhaust duct connection 18.
• the differential pressure sensor 22 is connected to the control unit 25 installed in the main body 4 by a signal line (not shown) and is transmitted.
• the differential pressure sensor 22 has a symmetrical structure in which the pressure receiving surface is a silicon diaphragm. This is because when the pressure is applied, the diaphragm is changed and the capacitance is changed, so that the change of the capacitance is electrically output.
• the tips of the HIGH side pressure introduction port 23 and the LOW side pressure introduction port 24 are disposed (not shown) so as to coincide with the inner wall surface of the exhaust duct connection port 18.
• a thermistor 28 that measures the temperature near the differential pressure sensor 22 is provided. Further, the outlet of the differential pressure sensor 22 is provided on the wall surface inside the exhaust duct connection port 18.
• a window opening / closing detection unit 29 for example, a magnet switch for detecting a state in which the window 30 is opened and closed is provided in the window 30, and is connected to a control unit 25 installed in the main body 4 by a signal line (not shown).
• a main body 4 and an exhaust duct connection port 18 provided on the side surface are provided with a filter 31 (for example, a no-cam filter) to control turbulence from the ventilation system.
• a filter 31 for example, a no-cam filter
• the third suction grille 13 installed on the ceiling surface of the toilet 12 is provided with a human feeling measuring device 32 (for example, a human feeling sensor) for detecting a person entering or leaving the room.
• a human feeling measuring device 32 for example, a human feeling sensor
• the configuration of the human feeling measurement device 32 is such that a heat ray detector for detecting a heat ray emitted by a human body, an amplifier (for example, an operational amplifier) for amplifying the signal of the heat ray detector, and the heat ray from the detection area In combination with the light receiving lens.
• a power supply switch 33 for the user to operate and stop the ventilation system and a strength switch 34 for changing the wind volume manually to strong and weak are provided in the stairhole 2, and are connected with the control unit 25 by a signal line ing.
• the ventilation system user turns on the power supply switch 33 of the ventilation system and sets the strength switch 34 to weak in order to operate the ventilation system
• the power is applied to the control unit 25. Be done.
• the program of the control unit 25 starts processing, and reading of data from the differential pressure sensor 22, thermistor 28, window open / close detection unit 29, and human feeling measurement device 32 is started. , And outputs a command to the fan 14 to start operation stronger than normal (for example, with strong rotation) for a certain period of time (for example, 5 minutes).
• the reason for operating stronger than normal (for example, with strong rotation) for a certain time (for example, 5 minutes) only for the initial period of energization is that the motor is weak (for example, weak rotation) when the motor torque is weak and the surrounding environment temperature is low. ) May cause the fan not to rotate. Therefore, in order to warm up the motor for a certain period of time, the operation is usually stronger.
• fan 14 connects suction port 17 provided on the lower surface of main body 4 and first suction grille 7 for a room through first suction duct to first suction duct connection.
• Indoor air is drawn from the mouth 5.
• room air is sucked from the second suction duct connection port 8 through the second suction grille 10 for the room through the second suction duct.
• room air is drawn from the third suction duct connection port 11 through the third suction grille 13 for the toilet and the third suction duct.
• the exhaust duct 19 communicating with the exhaust duct connection port 18 via the exhaust duct connection port 18 is exhausted to the outside air from the exhaust port 20 provided on the wall surface of the room through the exhaust duct 19.
• a differential pressure sensor 22 is provided at the exhaust duct connection port 18. From the value measured by the differential pressure sensor 22, the flow rate flowing through the exhaust duct connection port 18 can be known. If this flow rate is known, the air volume flowing in the exhaust duct 19 can be known.
• the differential pressure value set in advance in the program is compared with the current differential pressure value (temperature is measured by the thermistor 28 and correction is performed using the temperature coefficient as necessary), and the duct path pressure loss is If a difference occurs in the value due to the influence, the fan 25 is operated by the control unit 25 so that the difference in the differential pressure value is eliminated. As a result, the required ventilation air volume can be made constant.
• the vehicle becomes weak.
• the adjustment is started by the same method so that the air volume becomes constant, and when the adjustment is completed, the condition of window 30 is confirmed. Therefore, the state of the window opening / closing detection unit 29 is determined, and when the window opening / closing detection unit 29 is off, the fan 14 remains weak and the window opening / closing detection unit 29 is on.
• the so-called window 30 is open, the fan 14 is stopped after a certain period of time (for example, 10 minutes) elapses. For example, if you open and close the window 30 to dry the laundry, about 10 minutes work outside There is a possibility that you set a certain time to 10 minutes. At this time, if the human feeling measurement device 32 detects the presence of a person, even if the fan 14 is stopped, it is changed to the operating state.
• the ventilation system configured as described above can be designed and constructed without concern for the length of the duct and the influence of the piping, and can be optimally designed because the number of times of ventilation can be reliably ensured. Therefore, it is possible to reduce the load by eliminating the need for more specifications than necessary, and to provide environment-friendly products to ventilation system users at a low price.
• FIG. 4 is a mounting state diagram of the ventilation system according to the second embodiment of the present invention
• FIG. 5 is a flowchart showing the operation of the ventilation system.
• an automatic switch 35 is provided in the stairhole 2 and an outdoor thermistor 36 for measuring the temperature outside the room is provided. And the control unit 25 are connected by a signal line.
• an indoor thermistor 37 for measuring the temperature in the room is provided in the suction port 17 provided on the lower surface of the main body 4, and is connected to the control unit 25 by a signal line (not shown).
• the ventilation system user turns on the power switch 33 and sets the automatic switch 35 to operate the ventilation system
• power is applied to the control unit 25.
• the program of the control unit 25 starts processing, and the differential pressure sensor 22, the thermistor 28, the window opening / closing detection unit 29, the human feeling measurement device 32, the outdoor thermistor 36, the indoor thermistor 37 Start reading of powerful data, and output an instruction to the fan 14 to start operation stronger (for example, at high speed) than normal for a certain period of time (for example, 5 minutes).
• the fan 14 sets the suction port 17 provided on the lower surface of the main body 4 and the first suction grille 7 for the room through the first suction duct to the indoor suction duct 5
• the second suction grill 10 for the room also passes through the second suction duct, and the second suction
• the room air is sucked from the inlet duct connection port 11 and the room air is sucked from the third suction duct port 13 through the third suction duct 13 from the third suction grille 13 for the toilet, and through the exhaust duct port 18
• An exhaust duct 19 communicating with the exhaust duct connection port 18 is provided on the wall surface of the room, and the exhaust port 20 exhausts air to the outside air.
• the natural ventilation volume can be expected as described later, so the necessary ventilation frequency is 0.5 times
• the fan 14 will be reduced and the operation will be continued until the air volume meets the ventilation of (the values specified by the Japanese Building Standard Law). For example, if natural ventilation volume of 0.1 times can be expected from air-tightness inherent to the house, 0.53 times of ventilation can be secured by operating the ventilation fan for 0.33 times. Become.
• the ventilation volume in the house is equivalent to an area of 2 cm 2 Z 2 m 2 or less with a space of 2 cm 2 Z 2 m 2.
• a residence with an equivalent clearance area of 2 cm 2 Z 2 m 2 or more is expected. It can be reduced to the mechanical ventilation equivalent to 0.3 times Zh.
• the ventilation system configured as described above can use natural ventilation when a temperature difference occurs, and can reduce the load, so it is an inexpensive product for the ventilation system user and a product that considers the environment. Can be provided.
• Embodiment 1 The third embodiment will be described with reference to FIG.
• the same components as those in Embodiment 1 are assigned the same reference numerals and detailed explanations thereof will be omitted.
• FIG. 6 is a cross-sectional view of an exhaust duct port according to Embodiment 3 of the present invention.
• another exhaust duct connection port 38 of the same diameter is provided on the exhaust duct connection port 18 provided on the side of the main body 4 and the exhaust duct connection port 38 is connected to the exhaust duct 19 Do.
• an orifice 39 is provided inside the exhaust duct connection port 38, and holes 23 and 24 (for example, 44) communicating with the outside are opened on the front and rear wall surfaces of the orifice,
• the HIGH side pressure inlet of the differential pressure sensor 22 is connected to the hole 23 communicating with the outside, and the LOW side pressure is introduced.
• the mouth is configured to connect to a hole 24 communicating with the outside.
• the distance between the normal fan 14 and the differential pressure measurement portion is preferably 5 or more times the inner diameter of the exhaust duct connection port, but even if the distance is short, the same effect can be obtained if turbulent flow does not occur.
• FIG. 7 is a mounting diagram showing the ventilation system of the fourth embodiment of the present invention mounted on a ceiling
• FIG. 8 is a flow chart showing the operation of the ventilation system.
• a go out input switch 40 for inputting go out information is provided, and this go out input switch 40 is connected to the control unit 25 by a signal line.
• the outing input switch 40 is pressed, information that the user has gone out is input to the control unit 25.
• FIG. 9 is a mounting diagram showing the ventilation system of the fifth embodiment of the present invention mounted on the ceiling of a bathroom.
• the main body 4 of the ventilating apparatus is configured to be provided with a heating function 41 (for example, a heater).
• this ventilating apparatus if this ventilating apparatus is replaced with the staircase hall 2 and installed in, for example, a bathroom, it has a heating function, so that the bathroom can be heated and dried. Therefore, when the user enters the bathroom, it is possible to provide a product that does not feel a feeling of cold like in winter and can dry the laundry even in rainy weather or the like.
• the ventilating device mounted in a building according to the present invention is widely useful in products for controlling air volume at a constant level.

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• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Ventilation (AREA)
• Duct Arrangements (AREA)
• Air Conditioning Control Device (AREA)

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Citations (8)

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• 2006
  • 2006-06-28 JP JP2006177639A patent/JP2008008528A/ja active Pending
• 2007
  • 2007-06-18 WO PCT/JP2007/062214 patent/WO2008001634A1/ja not_active Ceased

Patent Citations (8)

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