JP2007003085A - Ventilation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilation device capable of reducing cleaning and maintenance times for a user, and improving safety in high lift work. <P>SOLUTION: In this ventilation device comprising an air discharge fan 3 and an air supply fan 4, and capable of securing desired ventilation air volume by discharging indoor air and taking in outside air, a floating particle detecting means 7 detecting outdoor floating particles is mounted in an air supply passage 34 inside of the ventilation device, a control means 10 is mounted for controlling the air discharge fan 3 and the air supply fan 4 on the basis of the amount of floating particles, the floating particle detecting means 7 detecting the floating particles is determined by a specified value set by the control means 10 and a determining means 9, and the air volumes of the air discharge fan 3 and the air supply fan 4 inside of the ventilation device are changed in accordance with a result of the determination to implement ventilation. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a ventilator that is attached to a building and controls a fan according to the amount of airborne particles.

  In recent years, hay fever is said to be a national disease. It is said that more than 1 in 10 people suffer from hay fever, and the number is known to increase year by year.

  Conventionally, this type of ventilator has a structure in which a filter is attached to the air supply fan side to remove suspended particles to remove suspended particles (eg, pollen, dust, etc.). (For example, refer to Patent Document 1). Hereinafter, a ventilation system as the ventilation device will be described with reference to FIG.

The indoor side 101 and the outdoor side 102 are communicated to provide an exhaust path 103 and an air supply path 104. The exhaust path 103 and the air supply path 104 are crossed halfway to provide a total heat exchanger 105. An exhaust fan 106 is disposed at a key point of the path, and an air fan 107 and a first filter 108 that adsorbs pollen, dust, and the like are disposed at a key point of the air supply path 104, and further, one end is provided. A return air passage 109 that opens to the indoor side 101 and is connected to the other end of the air supply passage 104 is provided at the other end, and a second filter 110 that adsorbs a chemical substance is disposed at a key point of the return air passage 109. In addition, the ventilation system is configured such that a sensor 111 for detecting a chemical substance is provided on the indoor side 101 and the exhaust fan 106 and the air supply fan 107 are controlled by the sensor.
Japanese Patent Laid-Open No. 10-110989

  In such a conventional ventilation system, in order to prevent airborne particles such as pollen and dust from entering the living room, a filter is arranged and removed, but when this conventional ventilation system is installed in a building, Since the filter is often installed at a relatively high place, cleaning the filter is very troublesome and involves a problem. In addition, when the ventilation system user forgets to clean the filter and the filter is clogged, there is a problem that the necessary number of ventilations cannot be secured.

  The present invention solves such a conventional problem, can suppress suspended particles in the room without using a filter, the user can reduce the cleaning time of the filter, maintenance time, It is an object of the present invention to provide a ventilator capable of ensuring a simple ventilation, energy saving, low cost, and effective ventilation.

  In order to solve the above problems, the ventilator according to the present invention is characterized in that it is controlled so as to suppress the invasion of floating particles outside the room.

  Further, the ventilator of the present invention is provided with an air supply fan and an exhaust fan, and is a ventilator capable of exhausting indoor air and taking in outside air to ensure a desired ventilation air volume, and an air supply path inside the ventilator Is provided with detection means for detecting outdoor suspended particles, and is provided with control means for controlling the air supply fan and the exhaust fan according to the amount of scattering of the suspended particles. The detection means for detecting the suspended particles is the control means. Ventilation is performed by changing the air volume of the air supply fan and the exhaust fan inside the ventilation device in accordance with the result of comparison with the set amount of suspended particles.

  In addition, the ventilator of the present invention, when the detecting means for detecting the suspended particles exceeds the amount of suspended particles set by the control means, the air volume of the air supply fan and the exhaust fan inside the ventilator. It is characterized by switching to weak operation and ventilating.

  In addition, the ventilator according to the present invention provides a steady air flow rate between the air supply fan and the exhaust fan inside the ventilator when the detecting means for detecting the airborne particles is less than the airborne particle scattering amount set by the control means. It is characterized by returning to the state and ventilating.

  Moreover, the ventilator of the present invention is characterized by providing pollen detection means for detecting pollen instead of the suspended particle detection means.

  The ventilator according to the present invention is characterized in that dust detection means for detecting dust is provided instead of the suspended particle detection means.

  In addition, a display means for displaying the amount of flying particles is provided.

  In addition, the storage means for storing the pattern of suspended particles on the previous day and the comparing means for comparing the amount of suspended particles in the current state with the previous day are provided in the control means. As a result of comparison by the comparing means, the same amount of suspended particles was obtained. In this case, the air volume of the supply fan and the exhaust fan on the previous day is controlled slightly earlier.

  Further, the amount of airborne particles that can be predicted according to the season is stored in the storage means, the season switching means for switching the season is provided in the ventilator, and the air volume of the air supply fan and the exhaust fan is switched by switching the switching means for switching the season. It is characterized by switching.

  Further, a weather determination means for determining the weather is provided instead of the season switching means.

  Further, a temperature setting means for detecting the temperature is provided.

  In addition, a day / night determination means for determining day and night is provided, and when the day / night determination means determines that the night, the supply of air inside the ventilator is stopped.

  In addition, a detection means for detecting human activity is provided, and the air volume of an air supply fan and an exhaust fan inside the ventilator is changed depending on the human activity state.

  Further, instead of detecting human activity, CO ↓ 2 detection means is provided.

  Also, a second air supply path is provided, the second air supply path is provided with a filter mounting portion, the air supply path is provided with a damper, and the damper changes the air supply path according to the amount of floating particles scattered. Ventilator characterized by that.

  According to the present invention, since the suspended particles are suppressed without using the filter, the user can clean the filter, reduce the maintenance time, and can secure the ventilation frequency. Therefore, it is possible to provide a ventilator that can improve safety, can be easily and save energy, is inexpensive, and can be effectively ventilated.

  The invention of the ventilator according to claim 1 is characterized in that the invasion of outdoor suspended particles is suppressed, and the outdoor suspended particles are ventilated so as to suppress the invasion of outdoor suspended particles. The user can reduce the time required for cleaning and maintenance of the filter, and the safety can be improved in high places.

  The invention according to claim 2 is a ventilating device comprising an air supply fan and an exhaust fan, and capable of exhausting indoor air and taking in outside air to secure a desired ventilation air volume, wherein the air supply path inside the ventilator Is provided with detection means for detecting outdoor suspended particles, and is provided with control means for controlling the air supply fan and the exhaust fan according to the amount of scattering of the suspended particles. The detection means for detecting the suspended particles is the control means. Ventilation is performed by changing the air volume of the air supply and exhaust fans inside the ventilator according to the result of comparison with the set amount of airborne particles. If the volume is higher than the set value, limit the ventilation to the minimum ventilation rate specified in the Building Standards Act.For example, if the amount of airborne particles is less than the set value, Change Operation that can secure the volume, for example, medium operation and strong operation, can suppress the inflow and intrusion of suspended particles of outside air into the room, can ventilate clean air, and the user can Time for cleaning, maintenance, and the like can be reduced, and in high places, safety can be improved and clean ventilation can be performed to ventilate clean outside air.

  According to a third aspect of the present invention, when the detecting means for detecting suspended particles exceeds the amount of suspended particles set by the control means, an air supply fan and an exhaust fan inside the ventilation apparatus. It is characterized by switching the air volume of the air to a weak operation and ventilating, preventing the inflow and intrusion of floating particles of outside air into the room, and can provide clean ventilation to ventilate clean outside air. The time required for cleaning and maintenance of the filter can be reduced, and the safety can be improved in high places.

  According to a fourth aspect of the present invention, when the detecting means for detecting the suspended particles is smaller than the amount of suspended particles set by the control means, the air supply fan and the exhaust fan inside the ventilation apparatus are provided. It is characterized by returning the air volume to a steady state and ventilating, preventing inflow and intrusion of floating particles of outside air into the room, and can perform clean ventilation to ventilate clean outside air, and the user can filter Cleaning and maintenance time can be reduced, and safety can be improved in high places.

  A fifth aspect of the present invention is the ventilator according to any one of the second to fourth aspects, further comprising pollen detection means for detecting pollen instead of the suspended particle detection means. Intrusion and inflow can be prevented, and clean ventilation to ventilate clean outside air can be performed, and the time for the user to clean and maintain the filter can be reduced, and in the case of high places, safety can be improved. Can do.

  A sixth aspect of the present invention is the ventilator according to any one of the second to fourth aspects, further comprising dust detection means for detecting dust instead of the suspended particle detection means. In addition, dust can be prevented from entering and flowing in, and clean ventilation can be performed to ventilate clean outside air, allowing the user to reduce the time required for cleaning and maintenance of the filter, etc. Can be increased.

  The invention of the ventilator according to claim 7 is characterized in that the amount of suspended particles scattered is displayed according to the amount of scattered particles, so that the amount of suspended particles in the outside air, the amount of scattered particles can be known, and the user can go out. Since a mask or the like can be protected according to the amount of scattering, it is possible to provide a ventilation device that allows the user to protect in advance from airborne particles such as pollen.

  The invention of the ventilator according to claim 8 is provided with a storage means for storing the suspended particle pattern of the previous day and a comparing means for comparing the amount of suspended particles in the previous day and the current state in the control means, and the comparison means compares them. As a result, if the same amount of suspended particles is obtained, the air volume of the supply fan and exhaust fan on the previous day is controlled slightly earlier, and it is more accurate by controlling slightly earlier. A ventilation device for preventing airborne particles from entering the room is provided.

  The invention of the ventilator according to claim 9 is provided with a storage means for storing the amount of suspended particles that can be predicted by the season, the seasoning means for switching the season being provided in the ventilator, and switching the switching means for switching the season. Since the air flow of the air supply fan and the exhaust fan is switched, it is possible to prevent the inflow and intrusion of floating particles such as pollen and dust of the outside air into the room only by encouraging the user to change the season. Therefore, it is possible to provide clean ventilation to ventilate clean outside air, and to provide a low-cost ventilation device to the user.

  The invention as set forth in claim 10 is characterized in that in the ventilator according to claim 9, there is provided a weather judgment means for judging the weather instead of the season switching means. A person can reduce the time for cleaning and maintenance of the filter, and in the case of a high place, safety can be improved and clean ventilation can be performed to ventilate clean outside air.

  The invention described in claim 11 is the ventilator according to claim 10, further comprising temperature setting means for detecting temperature, and determines the amount of suspended particles scattered from the weather and temperature. Therefore, a ventilation device that prevents airborne particles such as pollen from entering the indoor side more accurately is provided.

  The invention of the ventilator according to claim 12 is provided with day / night determination means for determining day and night, and when the day / night determination means determines that it is night, the supply of air inside the ventilation apparatus is stopped. Therefore, in order to completely prevent suspended particles, a ventilation device is provided that allows a user to sleep without worrying about suspended particles such as pollen while sleeping at night.

  The invention of the ventilator according to claim 13 includes a detecting means for detecting a human activity, and changes the air volume of the air supply fan and the exhaust fan inside the ventilator according to the human activity state. Therefore, a ventilator that can ensure the number of ventilations even when the amount of human activity increases is provided.

  The invention according to claim 14 is characterized in that, in the ventilator according to claim 13, CO ↓ 2 detecting means is provided instead of detecting human activity, so that when the amount of human activity increases Also, provide a ventilator that can ensure the number of ventilations reliably.

  The ventilator according to claim 15, further comprising a second air supply path, the second air supply path having a filter mounting portion, the air supply path having a damper, and the damper being configured to contain suspended particles. Provided is a ventilator that prevents airborne particles such as pollen from entering a room more accurately because the air supply path is changed depending on the amount of scattering.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(Embodiment 1)
As an example of the ventilation device of the present invention, a simultaneous supply / exhaust ventilation fan provided on an indoor wall in a building will be described as an example. FIG. 1 is a side sectional view showing a state in which the ventilator according to Embodiment 1 of the present invention is attached, FIG. 2 is a sectional view showing a state in which the ventilator is attached to a wall, and FIG. The flowchart figure which shows operation | movement is shown.

  As shown in FIGS. 1, 2, and 3, an exhaust casing 5 having an exhaust fan 3 and an air supply fan 4 on the shafts 2 on both sides of the electric motor 1 and forming a flow path of the exhaust fan 3, A ventilation device 8 including an air supply casing 6 that forms a flow path of the air supply fan 4 and floating particle detection means 7 (for example, a dust sensor that can output a voltage of the number of particles per unit volume), A horizontally long and box-shaped main body 9 is provided.

  Further, a control means 10 for controlling the air supply fan 4 and the exhaust fan 3 is provided in the main body 9, and the control means 10 is determined by comparing with a preset amount of suspended particles scattered. Means 11 is provided, and display means 12 for displaying the amount of suspended particles scattered is provided. The electric motor 1 is disposed in the horizontal direction so that the shaft 2 is aligned with the horizontal direction of the main body 9, and the exhaust casing 5 is disposed on the main body 9. The air supply casing 6 is disposed on the other side of the main body 9. In addition, an indoor exhaust port 13 is provided on the lower surface of the main body 9 on the lower side of the room, and an indoor air supply port 14 is provided on the upper surface of the main body 9 on the diagonal line of the indoor exhaust port 13. That is, the indoor side exhaust port 13 is provided at a lower portion on one end side of the main body 9 in which the exhaust casing 5 is provided, and the indoor side air supply port 14 is provided in the main body 9 in which the air supply casing 6 is provided. The indoor side exhaust port 13 and the indoor side air supply port 14 are positioned diagonally with respect to each other. A space formed between the exhaust casing 5 and the inner wall surface on one side of the main body 9 is used as an exhaust flow path 33, and on the other side of the main body 9, the outlet port and the chamber of the supply casing 6 are provided. An air supply channel 34 that communicates with the inner air supply port 14 is provided. An outdoor exhaust port 15 is provided outside the main body 9 so as to communicate with the indoor exhaust port 13 via the exhaust fan 3, and communicates via the indoor air supply port 14 and the air supply fan 4. The outdoor air supply port 16 is provided on the outdoor side of the main body 9, and the outdoor exhaust port 15 is connected to an exhaust duct 18 provided so as to penetrate the wall portion 17 and communicate with the outside to form an exhaust path. The outdoor air supply port 16 is provided with an air supply duct 19 provided so as to penetrate the wall portion 17 and communicate with the outside of the room to form an air supply path, and an exhaust duct 18 and an air supply duct are provided on the outer surface of the wall portion 17. A rainproof hood 20 is provided so that rainwater does not enter from the 19 outdoor openings.

  The control means 10 and the determination means 11 will be described according to the flowchart of FIG. When power is applied to the control means 10, the control means 10 starts processing (steps 2 to 7) according to the program of the control means 10, and operates the exhaust fan 3 and the supply fan 4 for a certain period of time, for example, A command for starting operation at a stronger than normal (for example, strong rotation) for 5 minutes is output (step 3). When the operation start command is received from the control means 10, the exhaust fan 3 is placed on the lower surface of the main body 9 by the exhaust fan 3. The air on the lower side of the room is sucked in from the provided indoor exhaust port 13, is exhausted from the outdoor exhaust port 15 through the exhaust duct 18, and the outdoor air passes through the air supply duct 19 by the air supply fan 4. The suspended particle detecting means 7 is sucked into the outdoor air supply port 16 and starts to detect the amount of suspended particles scattered (step 4), and the information of the suspended particle detecting means 7 is input to the control means 10 and the suspended particle detecting means. 7 The information is read as an initial value in the control means 10, and it is determined whether or not the read value and a preset specified value have been reached (step 5), and if the scattering amount value has reached the specified value The display means 12 displays a sign that prompts the user that the amount of scattering is large (step 6), and at the same time, the rotation of the air supply fan 4 (14.5 m / h in a 6 tatami room) can be secured (for example, weak) Rotation) and change to weak enough to protect the ventilation frequency (0.7 times) (Step 7). When the suspended particles have not yet reached the specified value, the exhaust fan 3 and the supply fan 4 are operated in a normal state (for example, medium rotation).

  As the control means 10, there is a microcomputer in which the above flow is programmed. The determination means 11 reads the information of the suspended particle detection means 7 as an initial value into the control means 10, and determines whether or not the read value and a preset specified value have been reached (step 5). It is. As the determination means 11, there is a microcomputer programmed with the above-described flow.

  The control means 10 can be realized using, for example, a microcomputer, and a program capable of a series of operations is written in the microcomputer.

  The determination unit 11 is, for example, a part of a program written in the microcomputer. The display unit 12 can be realized using, for example, an LED.

  The main body 9 configured as described above can control the exhaust fan 3 and the air supply fan 4 based on the result detected by the suspended particle detecting means 7, and can suppress suspended particles without a filter. Therefore, time for user cleaning, maintenance, and the like can be reduced, and safety can be improved in high places.

  Even if a pollen sensor or a dust sensor is used instead of the suspended particle detection means 7 (dust sensor), the operation and effect are the same.

  Although the display means 12 uses an LED as an example, the effect is the same even if it is realized using a means capable of displaying (for example, liquid crystal or the like).

(Embodiment 2)
The second embodiment will be described with reference to FIG. 4 and FIG. The same parts as those in the first embodiment are given the same reference numerals, and detailed description thereof is omitted.

  The control means 10 is provided with a storage means 21 (for example, an EEPROM) for storing the amount of suspended particles scattered on the previous day.

  In the above configuration, the operation of the simultaneous supply / exhaust ventilation fan according to the present embodiment will be described with reference to the flowchart shown in FIG.

  The flow from step 1 to step 7 is the same as that described with reference to FIG. 3 in the first embodiment. Changes to steps 1 to 7 will be described below.

  Power is applied to the microcomputer that controls the exhaust fan 3 and the air supply fan 4 (step 2). When power is applied to the microcomputer, the timer function (step 2A) in the microcomputer starts counting the timer, and at the same time, the suspended particle detecting means 7 starts detecting the amount of scattered particles (step 4). When the detection of the suspended particle scattering amount is started, the storage means 21 starts operating (step 4A), and the operation pattern of the exhaust fan 3 and the supply fan 4 and the output state of the suspended particle detection means 7 are stored for one day. (Step 5).

  The comparison means 22 is for comparing the suspended particle scattering amount detected by the suspended particle detection means 7 with the floating particle scattering amount of the previous day, and includes a microcomputer in which the above flow is programmed.

  When the timer function (Step 2A) finishes counting for one day and starts counting again, the suspended particle scattering amount detected by the suspended particle detecting means 7 is the same as the previous day's suspended particle scattering amount. For example, if the previous day's suspended particle detector 7 output state started counting and it was determined the previous day that the scattering amount would increase 10 minutes later, the previous day's floating particle scattering amount was predicted and the previous day's driving pattern was 10 minutes earlier. The air volume is variable (weak operation).

  The main body 9 configured as described above controls the exhaust fan 3 and the air supply fan 4 a little earlier from the amount of floating particles scattered, so that ventilation that prevents the floating particles from entering the indoor side more accurately is performed. An apparatus can be provided.

  Next, a configuration in which the season switching means 22 for switching seasons is used instead of the suspended particle detection means 7 will be described.

  Since there is data that the amount of airborne particles (for example, pollen) is scattered from March to May and there is almost no data for other months, the amount of airborne particles is predicted and storage means 21A (not shown). And the operation patterns of the exhaust fan 3 and the air supply fan 4 are stored.

  The main body 9 is provided with a season switching means 23 (for example, a slide SW) that allows the user to switch the season depending on the season.

  Since the main body 9 configured as described above can suppress the invasion of suspended particles only by the seasonal switching means, a low-cost ventilation device can be provided to the user.

  Next, a configuration in which the weather determination unit 24 (for example, determination based on the amount of power generated by the solar cell) and the temperature detection unit 25 are used instead of the season switching unit 23 will be described.

  It is known that airborne particles (eg, pollen) are produced in the summer of the previous year. Summer weather influences pollen production, and it is known that a lot of pollen is produced when the temperature is high and the duration of sunshine is long.

  In addition, the start of pollen scattering depends greatly on the weather of the day, and since it becomes warmer and tends to start suddenly when the wind from the south becomes stronger, it is necessary to monitor the weather immediately before, so control The storage means 21 (for example, EEPROM) which memorize | stores the weather conditions of the last year is provided in the means 10, and the weather determination means 24 (for example, solar cell) which can determine the weather is provided in the outdoor air supply opening 16. The temperature detecting means 25 (for example, a thermistor) capable of measuring the outdoor temperature is provided, and the wind speed detecting means 26 (for example, a wind speed sensor) is provided on the surface where the air supply duct 19 is in contact with the outside.

The main body 9 configured as described above has suspended particles (pollen) based on the previous year's weather conditions and the weather of the day.
Since the exhaust fan 3 and the air supply fan 4 are controlled on the assumption of the amount of scattering, it is possible to provide a ventilator that prevents airborne particles from entering the indoor side more accurately.

(Embodiment 3)
Embodiment 3 will be described with reference to FIGS. 6 and 7. FIG. The same parts as those in the first embodiment are given the same reference numerals, and detailed description thereof is omitted.

  The control means 10 is provided with day / night determination means 27 for determining day and night.

  In the above configuration, the operation of the simultaneous supply / exhaust ventilation fan according to the present embodiment will be described with reference to the flowchart shown in FIG.

  The flow from step 1 to step 7 is the same as that described with reference to FIG. 2 in the first embodiment. The flow following step 7 will be described below.

  In the example of the day / night determination means 27, day / night determination is performed using a light sensor, the light sensor (step 8) determines that it is night, and the suspended particle detection means 7 determines that the amount of floating particles scattered is large. The exhaust fan 3 and the air supply fan 4 are stopped.

  In the above configuration, if suspended particles (for example, pollen) or the like enter while sleeping at night, a person with hay fever may not be able to sleep. Since the exhaust fan 3 and the air supply fan 4 are stopped, it is possible to provide a ventilator that prevents airborne particles from completely entering the room at night.

(Embodiment 4)
The fourth embodiment will be described with reference to FIGS. The same parts as those in the first embodiment are given the same reference numerals, and detailed description thereof is omitted.

  The control means 10 is provided with detection means 28 for detecting human activities.

  In the above configuration, the operation of the simultaneous supply / exhaust ventilation fan according to the present embodiment will be described with reference to the flowchart shown in FIG.

  The flow from step 1 to step 7 is the same as that described with reference to FIG. 2 in the first embodiment. The flow following step 7 will be described below.

  When the pyroelectric infrared sensor (step 9) recognizes a person as an example of the detection means 28 for detecting human activity and the airborne particle detection means 7 determines that the amount of airborne particle scattering is small, exhaust is performed. The fan 3 and the air supply fan 4 are operated from a normal state (for example, medium rotation) to stronger than normal (for example, strong rotation).

In the above configuration, when it is determined that a person's occupancy is present and it is determined that there is an activity amount, the amount of air supply can be increased. Therefore, a ventilation device that can ensure ventilation can be provided.
In addition, the detection means 28 for detecting human activity has been described using a human sensor, but the effect is the same even if a CO ↓ 2 sensor is used.

(Embodiment 5)
The fifth embodiment will be described with reference to FIG. 10 and FIG. The same parts as those in the first embodiment are given the same reference numerals, and detailed description thereof is omitted.

  The air supply duct 19 includes a first air supply path 29 and a second air supply path 30, a filter 31 is provided at a key point of the second air supply path 30, and the air supply duct 19 includes a first air supply path 29. And a damper 32 that switches the second air supply path 30.

  Moreover, although it provided in the ventilation apparatus 8 provided with the floating particle detection means 7, the floating particle detection means 7 is set as the structure with which the air supply duct 19 is provided in the surface which touches the outdoor.

  In the above configuration, the operation of the simultaneous supply / exhaust ventilation fan will be described with reference to the flowchart shown in FIG.

  The flow from step 1 to step 5 is the same as that described with reference to FIG. 2 in the first embodiment. The flow following step 5 will be described below.

  When power is turned on to operate the exhaust fan 3 and the air supply fan 4 of the simultaneous supply / exhaust ventilation fan (step 1), power is supplied to the control means 10 that controls the exhaust fan 3 and the air supply fan 4. Applied (step 2). When power is applied to the control means 10, the control means 10 outputs a command for starting the operation of the exhaust fan 3 and the supply fan 4 for a certain period of time stronger than normal (for example, strong rotation) (step) 3). Upon receiving the operation start command, the exhaust fan 3 draws in the indoor lower air from the indoor exhaust port 13 provided on the lower surface of the main body 9 by the exhaust fan 3, and passes the exhaust duct 18 from the outdoor exhaust port 15. The outdoor air is exhausted outside the street, and the outdoor air is sucked into the outdoor side air inlet 16 through the air supply duct 19 by the air supply fan 4, and the suspended particle detection means 7 starts to detect the amount of scattering of the suspended particles (step) 4).

  The determination means 9 determines whether or not the scattering amount value of the suspended particles reaches a predetermined value (step 5), and when the scattering amount value reaches the specified value, the damper 32 is removed from the first air supply path 29. It changes to the 2nd air supply path | route 30 (step 9), and will supply air through the filter 31. FIG.

  When the scattering amount value does not reach the specified value, the damper 32 is changed from the second air supply path 30 to the first air supply path 29 (step 10), and air is naturally supplied.

  In the above configuration, since the air is supplied through the filter 31 only when it is determined that the scattering amount value is large, it is possible to reduce the frequency of cleaning and maintenance of the filter 31 and to provide a ventilation device that prevents the invasion of suspended particles. .

  The ventilation apparatus attached to the building concerning this invention is widely useful in the product which suppresses penetration | invasion of an airborne particle.

Side sectional view which shows the attachment state of the ventilator of Embodiment 1 of this invention Sectional drawing which shows the state which attached the ventilation apparatus to the wall part Flow chart showing operation of the ventilator Sectional drawing which shows the state which attached the ventilation apparatus of Embodiment 2 to the wall part Flow chart showing operation of the blower Sectional drawing which shows the state which attached the ventilation apparatus of Embodiment 3 to the wall part Flow chart showing operation of the blower Sectional drawing which shows the state which attached the ventilation apparatus of Embodiment 4 to the wall part Flow chart showing operation of the blower Air supply duct diagram of ventilation device of embodiment 5 Flow chart showing operation of the blower Configuration diagram showing a conventional ventilator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric motor 2 axis | shaft 3 Exhaust fan 4 Supply fan 5 Exhaust casing 6 Supply casing 7 Airborne particle detection means 8 Ventilator 9 Main body 10 Control means 13 Indoor side exhaust port 14 Indoor side air supply port 15 Outdoor exhaust Port 16 Outdoor air supply port 17 Wall 18 Exhaust duct 19 Air supply duct 20 Rainproof hood 21 Storage unit 22 Comparison unit 23 Season switching unit 24 Weather determination unit 25 Temperature detection unit 26 Wind speed detection unit 27 Day / night determination unit 28 Detection unit 29 First air supply path 30 Second air supply path 31 Filter 32 Damper 33 Exhaust flow path 34 Air supply path

Claims (15)

A ventilator that controls to prevent the entry of airborne particles outside the room. A ventilator equipped with an air supply fan and exhaust fan, which can exhaust the indoor air and take in the outside air to secure the desired ventilation air volume, and detects airborne particles in the air supply path inside the ventilator. And a control means for controlling the air supply fan and the exhaust fan according to the amount of scattering of the suspended particles, and the amount of scattering of the suspended particles set by the control means as the detecting means for detecting the suspended particles. The ventilator is characterized by changing the air volume of the air supply fan and exhaust fan inside the ventilator according to the result of the comparison. If the detection means for detecting airborne particles exceeds the amount of airborne particles set by the control means, the airflow inside the ventilation device and the air supply fan must be switched to weak operation for ventilation. The ventilation apparatus according to claim 1, wherein the ventilation apparatus is characterized. When the detection means for detecting the suspended particles is less than the amount of scattered air particles set by the control means, the air flow of the air supply fan and the exhaust fan inside the ventilation device is returned to the steady state for ventilation. The ventilator according to claim 1. The ventilator according to claim 1, further comprising pollen detection means for detecting pollen instead of the suspended particle detection means. The ventilation apparatus according to claim 1, further comprising dust detection means for detecting dust instead of the suspended particle detection means. The ventilator according to claim 1, further comprising display means for displaying the amount of suspended particles scattered. If the control means has a storage means for storing the suspended particle pattern of the previous day and a comparing means for comparing the amount of suspended particles in the previous day and the current state, the same amount of suspended particles is obtained as a result of comparison by the comparing means. The ventilator according to claim 1, wherein the air volume of the supply fan and exhaust fan on the previous day is controlled slightly earlier. The storage means stores the amount of airborne particle scattering that can be predicted according to the season, the seasoning means for switching the season is provided in the ventilation device, and the air volume of the supply fan and the exhaust fan is switched by switching the switching means for switching the season. Ventilation device characterized by that. The ventilation apparatus according to claim 9, further comprising a weather determination unit that determines the weather instead of the season switching unit. The ventilator according to claim 10, further comprising a temperature detection means for determining the temperature. The ventilator according to claim 1, further comprising a day / night determination means for determining day and night, and when the day / night determination means determines that the night is night, air supply in the ventilator is stopped. The ventilator according to claim 1, further comprising a detecting means for detecting a human activity, wherein the air volume of an air supply fan and an exhaust fan inside the ventilator is changed depending on a human activity state. The ventilation apparatus according to claim 1, further comprising CO ↓ 2 detecting means instead of detecting human activity. A second air supply path is provided, the second air supply path is provided with a filter mounting portion, the air supply path is provided with a damper, and the damper changes the air supply path according to the scattering amount of suspended particles. The ventilation apparatus according to claim 1, wherein the ventilation apparatus is characterized.

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