JP2005098573A - Ventilation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilation device which can be easily installed also in a room of an existing house, and measures a temperature difference between an indoor temperature and an outdoor temperature to conduct mechanical ventilation of a ventilation air in an amount insufficient with regard to a natural ventilation amount so that the ventilation device has high energy saving effect and is quiet. <P>SOLUTION: The ventilation device which comprises an air supply fan and an air discharge fan, forcibly discharges indoor air, takes outside air and can secure a desired ventilation air amount, is configured to calculate a natural ventilation air amount obtained by a difference between temperature output values detected a first temperature detector which detects an indoor temperature and a second temperature detector which detects an outdoor temperature, and a preset airtight performance of a house, and control a forcible ventilation air amount by the air supply fan and air discharge fan to an air amount obtained by subtracting the natural ventilation amount from the desired ventilation air amount. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a ventilator that is used in a house that is constantly ventilated in order to reduce sick house syndrome caused by formaldehyde and VOC (volatile organic compounds) contained in building materials and furniture.

  In recent years, attention has been paid to the effects of chemical substances generated from building materials on the human body due to the improvement of the airtightness of houses, and there is an increasing demand for ventilation devices that can ventilate houses with energy saving.

  Conventionally, this type of ventilator is equipped with a sensor that detects indoor and outdoor temperatures, stops the operation of the ventilation fan when the temperature difference is large, and passively ventilates air from a pre-installed exhaust port using the lift of air This is performed by switching between ventilation and mechanical ventilation that operates the ventilation fan when the temperature difference is small (see, for example, Patent Document 1). Hereinafter, the ventilation apparatus will be described with reference to FIGS. 6 and 7.

An inner cylinder 102 having a ventilation fan 101 mounted therein, an outer cylinder 104 provided so as to form an attraction air flow path 103 outside the inner cylinder 102, an inner cylinder 102 and an outer cylinder 104, Corresponding to the temperature difference detected by the body 106 provided in communication, the vertical duct 107 provided in the outer cylinder 104 so as to penetrate the roof of the house and communicate with the outside, and the outdoor temperature detection sensor and the indoor temperature detection sensor A control unit (not shown) for controlling the operation of the ventilating fan 101 is provided, and when the indoor temperature is higher than the outdoor temperature and the indoor / outdoor temperature difference is small as shown in the operation flowchart of FIG. When the temperature is large (when the temperature difference is 10 ° C. or more in the figure), the operation of the ventilation fan is stopped, and passive ventilation using the lift of air is performed.
Japanese Patent Laid-Open No. 10-176851

  In such a conventional configuration, the temperature difference between the outdoor temperature sensor and the indoor temperature sensor is detected, and when the indoor temperature is higher than the outdoor temperature, the operation of the ventilation fan is stopped and passive ventilation is performed. There was no disclosure of the amount of ventilation and the amount of ventilation by a ventilation fan, and passive ventilation could not be used efficiently.

  In addition, because it is a combination of passive ventilation using mechanical lift and mechanical ventilation, the ventilator has an inner cylinder fitted with a ventilator inside and an external air channel with an induced air channel formed outside the inner cylinder. A cylinder was provided, which penetrated the roof of the house and communicated with the outside. It was necessary to closely match the structure of the house and the ventilation design when designing the house. For this reason, the floor plan of the house is limited, and the ventilation fan device is not general-purpose, and it is necessary to design and adjust each door.

  Further, since an exhaust port is provided in advance for natural ventilation, the airtightness of the house is lowered, and the entry of outside wind and the increase of the air conditioning load during cooling and heating have been problems.

  This invention solves such a conventional subject, and it aims at providing the ventilation apparatus which ventilates efficiently combining natural ventilation and mechanical ventilation.

  It is another object of the present invention to provide a ventilator that can be easily installed in an existing house without using a door-by-door ventilation design.

  In order to achieve the above object, a ventilator according to the present invention is provided with an air supply fan and an exhaust fan, forcibly exhausting indoor air, taking in outside air, and ensuring a desired ventilation air volume. From the difference between the temperature output values detected from the first temperature detector that detects the indoor temperature and the second temperature detector that detects the outdoor temperature, and the preset airtight performance of the house The obtained natural ventilation air volume is calculated, and the forced ventilation air volume by the air supply fan and the exhaust fan is controlled to be an air volume obtained by subtracting the natural ventilation air volume from the desired ventilation air volume.

  Further, when the difference between the indoor temperature and the outdoor temperature is approximately 0 ° C., the natural ventilation amount is set to 0 times / h, and the forced air amount by the supply fan and the exhaust fan is controlled.

  For a house having an airtightness coefficient of 2 to 5, when the difference between the indoor temperature and the outdoor temperature is approximately 5 ° C., the forced air flow by the air supply fan and the exhaust fan is controlled by setting the natural ventilation amount to 0.1 times / h. It is a configuration.

  For a house with an airtightness coefficient of 2 to 5, when the difference between the indoor temperature and the outdoor temperature is approximately 14 ° C. or more, the natural ventilation amount is set to 0.2 times / h and the forced ventilation by the supply fan and the exhaust fan is performed. The air volume is controlled.

  Further, for a house having an airtightness coefficient of 2 to 5, when the difference between the indoor temperature and the outdoor temperature is approximately 25 ° C. or more, the natural ventilation amount is set to 0.3 times / h and the forced ventilation by the supply fan and the exhaust fan is performed. The air volume is controlled.

  Further, the ventilation device is provided in each room of a building having a plurality of rooms.

  As described above, according to the ventilator of the present invention, the ventilator is provided with an air supply fan and an exhaust fan, forcibly exhausting indoor air, taking in outside air, and ensuring a desired ventilation air volume. Obtained from the difference between the temperature output values detected from the first temperature detector for detecting the indoor temperature and the second temperature detector for detecting the outdoor temperature, and the preset airtight performance of the house By calculating the natural ventilation air volume, and controlling the forced ventilation air volume by the supply fan and the exhaust fan to the air volume obtained by subtracting the natural ventilation air volume from the desired ventilation air volume, to ensure the working ventilation air volume, Electric energy required for ventilation can be saved, and ventilation with reduced noise due to operation of the ventilator can be performed.

  In addition, when the difference between the indoor temperature and the outdoor temperature is approximately 0 ° C, the natural ventilation amount is set to 0 times / h, and only a forced air amount by the supply fan and the exhaust fan is used to ensure a predetermined ventilation amount. it can.

  For houses with an airtightness coefficient of 2 to 5, when the difference between the indoor temperature and the outdoor temperature is approximately 5 ° C, the forced air flow by the air supply fan and the exhaust fan is controlled by setting the natural ventilation to 0.1 times / h. The desired ventilation air volume can be secured.

  For houses with an airtightness coefficient of 2 to 5, when the difference between the indoor temperature and the outdoor temperature is approximately 14 ° C. or more, the natural ventilation rate is 0.2 times / h, and the forced ventilation air volume by the supply fan and exhaust fan Can be controlled to ensure a desired ventilation air volume.

  For houses with an airtightness coefficient of 2 to 5, when the difference between the indoor temperature and the outdoor temperature is approximately 25 ° C. or more, the natural ventilation rate is set to 0.3 times / h and the forced ventilation flow rate by the supply fan and exhaust fan Can be controlled to ensure a desired ventilation air volume.

  Further, a ventilation device can be provided in each room of a building having a plurality of rooms, and a desired ventilation air volume can be ensured by detecting the temperature difference between the room temperature and the room temperature independently for each room.

  In this embodiment, the desired ventilation rate is secured by controlling the ventilation air volume with respect to the predetermined temperature differences of about 5 ° C., about 14 ° C., and about 25 ° C. Needless to say, there is no difference in the effect of selecting and controlling.

  The invention described in claim 1 is a ventilating apparatus comprising an air supply fan and an exhaust fan, forcibly exhausting indoor air, taking in outside air, and securing a desired ventilation air volume. Calculates the natural ventilation air volume obtained from the difference between the temperature output value detected from the first temperature detector to detect and the second temperature detector to detect the outdoor temperature, and the preset airtight performance of the house The forced ventilation air volume by the air supply fan and the exhaust fan is controlled to the air volume obtained by subtracting the natural ventilation volume from the desired ventilation air volume, thereby ensuring the working ventilation air volume.

  According to the second aspect of the present invention, when the difference between the indoor temperature and the outdoor temperature is 0 ° C. ± 2 ° C., the natural ventilation amount is set to 0 times / h, and the ventilation air amount is controlled only by the forced air amount by the supply fan and the exhaust fan. Have

  According to the third aspect of the present invention, for a house having an airtightness coefficient of 2 to 5, when the difference between the indoor temperature and the outdoor temperature is 5 ° C. ± 2 ° C., the natural ventilation is set to 0.1 times / h and the air supply fan and the exhaust It has the effect of controlling the forced air volume by the fan.

  According to the fourth aspect of the present invention, in a house having an airtightness coefficient of 2 to 5, when the difference between the indoor temperature and the outdoor temperature is 14 ° C. or more, the natural ventilation amount is 0.2 times / h, and the air supply fan and the exhaust fan are used. Has the effect of controlling the forced ventilation air volume.

  According to the fifth aspect of the present invention, in a house having an airtightness coefficient of 2 to 5, when the difference between the indoor temperature and the outdoor temperature is 225 ° C. ± 2 ° C. or more, the natural ventilation is set to 0.3 times / h and the air supply fan and the exhaust It has the effect of controlling the forced ventilation air volume by the fan.

  According to a sixth aspect of the present invention, the ventilator is provided in each room of a building having a plurality of rooms, and has an effect of controlling the ventilation air volume for each room.

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

(Embodiment 1)
As shown in FIGS. 1 to 3, since the motor of the ventilation fan is generally 3rd to 4th, the exhaust fan 3 and the air supply are provided on the left and right rotating shafts 2 of the motor 1 capable of adjusting the speed of 4th speed. An exhaust casing 5 having an air fan 4 and forming a flow path of the exhaust fan 3, and an air supply device 8 having an air supply casing 6 and an air supply filter 7 forming the flow path of the air supply fan 4. In the box-shaped main body 9, the indoor exhaust port 10 is provided on the lower surface of the main body 9 on the indoor side, and the indoor air supply port 11 is provided on the upper surface of the main body 9 on the diagonal line of the indoor exhaust port 10. The indoor air supply port 11 is provided with a rectifying plate 12 that sends the air flow obliquely forward, and the outdoor exhaust port 13 is provided on the indoor side of the main body 9 so as to communicate with the indoor exhaust port 10 via the exhaust fan 3. A room is provided outside the main body 9 so as to communicate with the indoor air supply port 11 via the air supply fan 4. A side air inlet 14 is provided, the outdoor air outlet 13 communicates with the outside through the wall portion 15 and is connected to an exhaust duct 16 provided so as to form an exhaust path, and the outdoor air inlet 14 is connected to the wall. An intake duct 17 is provided so as to penetrate the section 15 and communicate with the outside and form an air supply path, and rainwater does not enter the outer surface of the wall section 12 from the outdoor openings of the exhaust duct 16 and the air supply duct 17. A rainproof hood 18 is provided.

  The indoor air supply port 10 is provided with a first temperature sensor 19 for measuring the indoor temperature, and the outdoor air supply port 14 is provided with a second temperature sensor for measuring the outdoor temperature. 20 and a control means 21 for adjusting the ventilation air volume of the blower 8 from the output values of the first temperature sensor 19 and the second temperature sensor 20 are provided in the main body 9.

  The blower 8 configured as described above has a ventilation air volume of 0.2 times / h ventilation (weak) by the control means 21 based on the output values of the first temperature sensor 19 and the second temperature sensor 20. ), 0.3 times / h ventilation (medium), 0.4 times / h ventilation (strong), and 0.5 times / h ventilation (special strength).

  In the above configuration, when the ventilator 8 is operated, indoor air and outdoor air flow through the indoor air supply port 11 and the outdoor air supply port 14 respectively, and the first temperature sensor 19 detects the temperature of the indoor air. The second temperature sensor 20 detects the temperature of the outdoor air. Then, as shown in the operation flowchart of FIG. 4, the temperature difference between the indoor temperature and the outdoor temperature is calculated, and the ventilation air volume is determined based on the natural ventilation volume calculation diagram shown in FIG.

  In addition, the natural ventilation amount calculation diagram of FIG. 5 is a graph of the result of examining how the natural ventilation frequency of the house becomes due to the temperature difference between the indoor and the outdoor when the airtight coefficient of the house is 2 to 5. FIG.

  The horizontal axis indicates the indoor / outdoor temperature difference / ° C., and the vertical axis indicates the ventilation frequency / time / h. For example, when the indoor / outdoor temperature difference is 5 ° C., the natural ventilation frequency is 0.1 times / h.

  By the way, in the case of a normal highly airtight house, for example, considering the grade (4 star) of commonly used building materials, there is no temperature difference between indoor and outdoor, and natural ventilation cannot be expected. If the ventilation air volume can be secured 0.5 times / h, the standard value in the ventilation construction manual can be satisfied.

  This application pays attention to the above-mentioned reference value, and realizes energy-saving ventilation operation on the basis of securing a constant ventilation air volume of 0.5 times / h as a reference value by combining the natural ventilation air volume and the mechanical forced ventilation air volume.

  Especially when the temperature difference between indoor and outdoor becomes high as in winter, the amount of natural ventilation inside and outside increases, so the difference between the output values of the first temperature sensor 19 and the second temperature sensor 20 is taken, When the temperature difference is 5 ° C. ± 2 ° C. or more, the control means 21 can expect a natural ventilation rate of 0.1 times / h, so that the mechanical ventilation air volume is switched to 0.4 times / h.

  When the temperature difference is 14 ° C. ± 2 ° C. or more, the control means 21 can expect a natural ventilation rate of 0.2 times / h, so the mechanical ventilation air rate is switched to 0.3 times / h.

  Furthermore, when the temperature difference is 25 ° C. ± 2 ° C. or more, the control means 21 can expect a natural ventilation rate of 0.3 times / h, so the mechanical ventilation air rate is switched to 0.2 times / h. In both cases, the mechanical ventilation air volume is reduced, and the indoor ventilation air volume is summed with the natural ventilation volume to secure the required ventilation volume of 0.5 times / h.

  The main body 9 is also provided with an exhaust casing 5 that forms a flow path for the exhaust fan 3, an air supply casing 6 that forms a flow path for the air supply fan 4, and an air supply filter 7. Equipped with a ventilator that matches the size of the room, for example, for 6 tatami mats, for 8 tatami mats, for 10 tatami mats, etc., so that air supply and exhaust can be easily secured for each room. Will be.

  The ventilator according to the present invention calculates the natural ventilation airflow from the temperature difference between the indoor temperature and the outdoor temperature and the confidentiality of the house set in advance, and the forced ventilation airflow by the ventilator is obtained by subtracting the natural ventilation airflow. As it is possible to secure the necessary ventilation air volume of the house while saving wasteful power and energy saving ventilation, it is particularly effective for winter use where the difference between the indoor temperature and the outdoor temperature is large, This is useful for high airtight houses where the temperature difference between indoor and outdoor is relatively large.

The block diagram of the ventilator of Embodiment 1 of this invention Installation diagram of the ventilator Usage diagram of the ventilator Operation flowchart of the ventilator Calculation of natural ventilation air flow in houses with an air tightness coefficient of 2-5 Configuration diagram of conventional ventilation equipment Operation flowchart of the ventilator

Explanation of symbols

19 First sensor 20 Second sensor 21 Control means

Claims (8)

A first temperature detector that includes an air supply fan and an exhaust fan, forcibly exhausts indoor air, takes in outside air, and secures a desired ventilation air volume, and detects the indoor temperature A natural ventilation air volume obtained from a difference in temperature output value detected from the air temperature and a second temperature detector for detecting the outdoor temperature and a preset airtight performance of the house, and the air supply fan and the exhaust A ventilator for controlling a forced ventilation airflow by a fan to an airflow obtained by subtracting the natural ventilation airflow from the desired ventilation airflow. The ventilator according to claim 1, wherein when the difference between the indoor temperature and the outdoor temperature is substantially 0 ° C, the forced air flow by the air supply fan and the exhaust fan is controlled by setting the natural ventilation amount to 0 times / h. 6. For a house having an airtightness coefficient of 2 to 5, when the difference between the indoor temperature and the outdoor temperature is approximately 5 ° C., the forced air flow by the supply fan and the exhaust fan is controlled by setting the natural ventilation to 0.1 times / h. The ventilator according to 1. For houses with an airtightness coefficient of 2 to 5, when the difference between the indoor temperature and the outdoor temperature is approximately 14 ° C. or more, the natural ventilation amount is set to 0.2 times / h, and the forced ventilation air volume by the supply fan and the exhaust fan is set to The ventilator according to claim 1 to be controlled. For houses with an airtightness coefficient of 2 to 5, when the difference between the indoor temperature and the outdoor temperature is approximately 25 ° C. or more, the natural ventilation amount is set to 0.3 times / h, and the forced ventilation air volume by the supply fan and the exhaust fan is set to The ventilator according to claim 1 to be controlled. The ventilation device according to any one of claims 1 to 5, wherein the ventilation device is provided in each room of a building having a plurality of rooms. A ventilation method of operating a ventilator with a forced ventilation airflow as an airflow obtained by reducing a natural ventilation airflow of a house in order to secure a reference ventilation airflow in the house. A ventilator for performing a forced ventilation operation so as to obtain a reference ventilation airflow in the house by adding the forced ventilation airflow to the natural ventilation airflow of the house.

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