JP2018054135A - Heat exchange type ventilation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchange type ventilation device automatically determining an angle of an air volume control damper to enable simplification of site work.SOLUTION: A heat exchange type ventilation device is such that: a control part 11 controls the revolution speed of an air supply motor (or exhaust motor); an air supply path 7 (or an exhaust path 8) is connected with a circulation air path 14 of a unitary air conditioner 13; the control part 11 automatically determines an aperture area of an air volume control damper to simplify site work by varying the aperture area of an air volume control damper 15 mounted in the air supply path 7 or an air volume control damper 16 mounted in the exhaust path 8 so that a current value of the air supply motor (or the exhaust motor) detected by a current detection means 17 becomes within a prescribed range of a target current value.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a heat exchange type ventilator for exchanging heat between outside air and room air.

Conventionally, as this type of ventilator, a heat exchange type ventilator that is installed in a building, introduces outside air from an outside air supply port, and supplies the inside through a built-in heat exchange element is known. (For example, see Patent Document 1)
Hereinafter, the heat exchange type ventilator will be described with reference to FIG.

  As shown in FIG. 5, the ventilator main body 101 is installed in an attic space or a ceiling space in a building.

  Fresh outside air is introduced from the outside air inlet 102, passes through the built-in heat exchange element 103, and is supplied to the room through the indoor inlet 104.

  On the other hand, the dirty air in the room is introduced from the indoor exhaust port 105, passes through the heat exchange element 103, and is exhausted to the outside through the outdoor exhaust port 106.

  Fresh fresh air introduced from the outside air supply port 102 and indoor dirty air introduced from the indoor exhaust port 105 are connected to the air supply fan 109 connected to the electric motor 107 on the same shaft 108 via the heat exchange element 103. It is configured to be transferred by the exhaust fan 110.

JP-A-11-325535

  In order to ventilate the heat exchange type ventilator, it is necessary to adjust the air volume in the supply path or the exhaust path.

  When connecting the air supply path (or exhaust path) of the conventional heat exchange type ventilator and the circulation air path of unitary air conditioning, in order to adjust the air volume, the air supply path of the heat exchange type ventilator An air volume adjustment damper was installed in the duct in (or the exhaust path). However, in this configuration, the angle (opening area) of the air volume adjusting damper has to be determined while measuring the air volume, and there is a problem that the on-site construction is complicated.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide a heat exchange type ventilator that can automatically determine the opening area of an air volume adjusting damper and simplify on-site construction.

  In order to achieve this object, a heat exchange ventilator according to an aspect of the present invention includes an air supply fan provided with an air supply motor, an exhaust air fan provided with an exhaust motor, and the supply air An air supply path for blowing air from the outside to the room by an air blower, an exhaust path for blowing air from the room to the outside by the exhaust fan, and a position where the air supply path and the exhaust path intersect, In a heat exchange type ventilator comprising a heat exchange element for exchanging heat when ventilating the air and outdoor air, and a current detection means for detecting a current flowing through the air supply motor, The number of revolutions of the air supply motor is controlled, the air supply path is connected to a circulation air path of unitary air conditioning, and the control unit is configured to target the current value of the air supply motor detected by the current detection means. Within the specified range of current value Sea urchin, which changes the opening area of the air flow control damper provided in the air supply path, thereby is to achieve the intended purpose.

  ADVANTAGE OF THE INVENTION According to this invention, the heat exchange type | mold ventilation apparatus which simplified site construction can be provided by determining automatically the opening area of the air volume adjustment damper provided in an air supply path | route or an exhaust path | route.

Top sectional drawing which shows the heat exchange type | mold ventilation apparatus of Embodiment 1 of this invention Diagram showing the relationship between motor speed and motor current knowledge Diagram showing the construction of the heat exchange ventilator The figure which shows other construction of the heat exchange type ventilator Top view configuration diagram showing a conventional heat exchange ventilator

  A heat exchange type ventilator according to an aspect of the present invention is fed into a room from the outside by an air supply fan provided with an air supply motor, an exhaust air fan provided with an exhaust motor, and the air supply fan. An air supply path, an exhaust path that is blown from the room to the outside by the exhaust fan, and a position where the air supply path and the exhaust path intersect to ventilate indoor air and outdoor air. In a heat exchange type ventilator provided with a heat exchange element for exchanging heat and a current detection means for detecting a current flowing through the air supply motor, the controller controls the number of rotations of the air supply motor. The air supply path is connected to a circulation air path of unitary air conditioning, and the control unit is configured so that the current value of the air supply motor detected by the current detection means falls within a predetermined range of a target current value. , Provided in the air supply path Having the configuration of changing the open area amount adjusting damper.

  Thereby, the opening area of an air volume adjustment damper can be determined automatically, field construction can be simplified, and construction man-hours can be reduced. Further, even when the operation notch is changed after the completion of the construction, the adjustment and construction of the air volume adjusting damper is not necessary again, and the adjustment can be automatically performed, so that the number of construction man-hours can be reduced. The same effect can be obtained when the exhaust path is connected to the circulation air path of the unitary air conditioning and the opening area of the air volume adjusting damper provided in the exhaust path is changed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
The internal configuration, the air supply path, and the exhaust path of the heat exchange type ventilator according to the first embodiment will be described with reference to FIG.

  As shown in FIG. 1, a heat exchange ventilator 1 includes an outside air suction port 2 and an indoor air exhaust port 3 on the side surface of a box-shaped main body, and an outside air supply port 4 and room air on the side surface facing this side surface. A suction port 5 is provided.

  Further, the heat exchange ventilator 1 draws fresh outdoor air (supply air) from the side outside air inlet 2 and passes through the heat exchange element 6 inside the heat exchange type ventilator 1 to the outside air inlet. An air supply path 7 is provided from 4 to the room.

  On the other hand, the contaminated indoor air (exhaust air) is sucked in from the indoor air intake port 5, and has an exhaust path 8 through which the air is exhausted from the indoor air exhaust port 3 through the heat exchange element 6. At this time, the heat exchange element 6 has a heat recovery function of supplying the amount of heat of exhausted air to the supplied air, or supplying the amount of heat of supplied air to the amount of heat of exhausted air. Have.

  Fresh outdoor air (supply air) introduced from the outside air inlet 2 and contaminated indoor air (exhaust air) introduced from the indoor air inlet 5 are an air supply fan 9 and an exhaust fan 10. , The air flow path 7 and the exhaust path 8 respectively flow.

  The heat exchange element 6 is disposed at a position where the air supply path 7 and the exhaust path 8 intersect. An air cleaning filter 12 is disposed on each of the outdoor air suction side and the indoor air suction side of the heat exchange element 6. In addition, ducts can be connected to the outside air inlet 2, the indoor air outlet 3, the outside air inlet 4, and the room air inlet 5, respectively.

  The heat exchange ventilator 1 has a control unit 11 that controls the rotation speeds of the supply motor of the supply fan 9 and the exhaust motor of the exhaust fan 10. The control unit 11 controls the rotation speeds of the supply motor of the supply fan 9 and the exhaust motor of the exhaust fan 10 to keep the supply air amount and the exhaust air amount constant, Current detecting means 17 for detecting the current flowing through the motor.

  Here, the control performed by the control unit 11 to keep the supply air amount and the exhaust air amount constant will be described. When the heat exchange ventilator 1 is activated, the control unit 11 controls the rotation speeds of the air supply motor and the exhaust motor so that the airflow output from the air supply fan 9 and the exhaust air fan 10 are equal. (Heat exchange air operation) Normally, when the operation is started in the construction state, the static pressure outside the machine due to the fixed duct routing is applied to the heat exchange type ventilator, and the control unit 11 supplies the air supply motor and the exhaust motor in order to output a predetermined air volume. The current value of each motor is controlled while checking the number of rotations. The control unit 11 stores in advance the relationship between the supply motor rotation speed and the supply motor current value for outputting a predetermined air volume, and the relationship between the exhaust motor rotation speed and the exhaust motor current value.

  FIG. 2 shows the relationship between the motor rotation speed and the motor current value for realizing the predetermined air volume. The control unit 11 realizes the set predetermined air volume by matching the relationship between the motor rotation speed and the motor current value. That is, constant air volume control can be realized on the line shown in FIG.

  Here, the characteristic part in this Embodiment, ie, the air volume adjustment damper operation | movement of the control part 11, is demonstrated.

  FIG. 3 shows a construction diagram of the present embodiment. The unitary air conditioner 13 is installed in a machine room or the like in a building, and is connected to the room by a duct to form a circulation air passage 14 in the room.

  The unitary air conditioner 13 performs cooling and heating so that the set room temperature is reached, blows air to the circulation air passage 14, and controls the interior to a predetermined temperature by circulating air through a plurality of indoor rooms. To do.

  The circulation air path 14 is a temperature control path via the unitary air conditioner 13 and is not ventilated indoors, and there is no supply of fresh outdoor air indoors. Therefore, by connecting the air supply path 7 to the circulation air path 14, the heat is exchanged at the same time while adjusting the temperature by indoor circulation, and the outdoor fresh air is taken in indoors while collecting heat. At this time, the air supply path 7 on the downstream side of the heat exchange element 6 is connected to the circulation air path 14 of the unitary air conditioner 13.

  At this time, the unitary air conditioner 13 performs indoor circulation operation, but negative pressure is applied to the outside air supply port 4 of the heat exchange type ventilation device 1 by the air blowing function of the unitary air conditioner 13. As a result, the air flow path 7 of the heat exchange type ventilation device 1 is pulled by the unitary air conditioner 13 so that the air volume more than the design flows. Especially in the winter season, a large amount of low-temperature outside air flows to cause problems such as condensation. there is a possibility. In order to suppress this, an air volume adjustment damper 15 for canceling the negative pressure from the unitary air conditioner 13 is provided between the heat exchange type ventilation device 1 and the circulation air path 14 of the unitary air conditioner 13 in the air supply path 7. .

  Conventionally, the air volume adjustment damper 15 determines the angle by adjusting the opening area (opening ratio) so as to be a predetermined air volume while actually measuring the supply air volume of the heat exchange type ventilation device 1. However, on-site construction becomes complicated because it is necessary to measure the air volume each time.

  In the present embodiment, the air volume adjusting damper 15 can automatically adjust the opening area (opening ratio) by the control unit 11, thereby reducing the number of construction steps on site.

  Specifically, the control unit 11 causes the air supply fan 9 to be operated at a predetermined rotation speed. At this time, if the unitary air-conditioning is operated and the air volume adjustment damper 15 is fully opened, the load of the air supply fan 9 is reduced due to the negative pressure, and the current value of the air supply motor detected by the current detection means 17 is a predetermined current. The value is smaller than the value.

  Therefore, the air volume adjusting damper 15 moves the damper angle by a predetermined angle (for example, 1 °) so as to reduce the damper opening area (opening ratio). When it enters a predetermined range (for example, within 1%) with respect to the target current value, the adjustment of the air volume adjustment damper 15 is finished and the damper angle is determined.

  Here, the rotational speed of the air supply blower 9 at the time of adjusting the damper is preferably the rotational speed at the external static pressure 0 Pa (P = 0 in FIG. 2) at which the power consumption can be reduced most. This is because the pressure loss can be reduced most at the external static pressure of 0 Pa (P = 0 in FIG. 2).

  In addition, if the control unit 11 operates the air supply fan 9 at a predetermined rotation speed and the unitary air conditioning is operated at this time and the air volume adjustment damper 15 is fully closed, the air supply fan 9 has no air supply path. The work cannot be performed, and the current value of the air supply motor detected by the current detection means 17 is smaller than the predetermined current value. Therefore, the air volume adjusting damper 15 moves the damper angle by a predetermined angle (for example, 1 °) so as to increase the damper opening area (opening ratio). When a predetermined range (for example, within 1%) with respect to the target current value is entered, the adjustment of the damper is terminated and the damper angle is determined.

  In this embodiment, the rotational speed is kept constant and the damper angle is determined by adjusting the damper opening area (opening ratio) of the air volume adjustment damper 15 so that the current value falls within the predetermined range of the target current value. May be determined, and the damper angle may be determined by adjusting the damper opening area (opening ratio) of the air volume adjusting damper 15 so that the rotational speed falls within a predetermined range of the target rotational speed. In this case, a rotation speed detection means (not shown) is provided instead of the current detection means 17, and the rotation speed detection means detects the rotation speed of the air supply motor or the exhaust motor, and the control unit 11 sets the damper angle. decide.

  Moreover, you may connect the exhaust path 8 to the indoor circulation air path 14 like the figure which shows the other construction of FIG. The unitary air conditioner 13 performs indoor circulation operation, but negative pressure is applied to the indoor air suction port 5 of the heat exchange type ventilation device 1 by the air blowing function of the unitary air conditioner 13. As a result, the exhaust path 8 of the heat exchanging ventilator 1 cannot draw the designed air volume while being pulled by the unitary air conditioner 13, and particularly in the winter season, the indoor air volume that is hot relative to the low-temperature outside air volume hardly flows. Therefore, the outside air that does not exchange heat may flow directly into the room through the air supply path 7, which may cause problems such as condensation or a feeling of cold wind. In order to suppress this, an air volume adjusting damper 16 for canceling the negative pressure from the unitary air conditioner 13 is provided between the heat exchange type ventilation device 1 and the circulation air path 14 of the unitary air conditioner 13 in the exhaust path 8.

  The air volume adjusting damper 16 can automatically adjust the opening area (opening ratio) by the control unit 11, thereby reducing the number of construction steps on site.

  Specifically, the control unit 11 causes the exhaust fan 10 to be operated at a predetermined rotational speed. At this time, if the unitary air-conditioning is operated and the air volume adjustment damper 16 is fully open, the exhaust fan 10 does not work because the load becomes large due to negative pressure and the air cannot be blown, and the current of the exhaust motor detected by the current detection means 17 The value is smaller than a predetermined current value. Therefore, the air volume adjusting damper 16 moves the damper angle by a predetermined angle (for example, 1 °) so as to reduce the damper opening area (opening ratio). When it enters a predetermined range (for example, within 1%) with respect to the target current value, the adjustment of the air volume adjustment damper 16 is finished and the damper angle is determined.

  Here, the rotational speed of the exhaust blower 10 at the time of adjusting the damper is preferably the rotational speed at the external static pressure 0 Pa (P = 0 in FIG. 2) at which the power consumption can be reduced most.

  In addition, if the control unit 11 operates the exhaust fan 10 at a predetermined rotation speed and the unitary air conditioning is operated and the damper is fully closed at this time, the exhaust fan 10 cannot work because there is no air passage. The current value of the exhaust motor detected by the current detection means 17 is smaller than a predetermined current value. Therefore, the air volume adjusting damper 16 moves the damper angle by a predetermined angle (for example, 1 °) so as to increase the damper opening area (opening ratio). When it enters a predetermined range (for example, within 1%) with respect to the target current value, the adjustment of the air volume adjustment damper 16 is finished and the damper angle is determined.

  In this way, by automatically determining the angle of the air volume adjusting damper, it is possible to obtain a heat exchange type ventilation device that can simplify on-site construction and reduce the number of construction man-hours.

  Hereinafter, this embodiment will be supplemented.

  The unitary air conditioning 13 includes the concept of the whole building air conditioning or the central air conditioning (central air conditioning).

  Moreover, although the control part 11 was provided in the heat exchange type ventilator 1, it does not need to be provided in the heat exchange type ventilator 1. FIG. In this case, control is performed by the control unit 11 located at a position away from the heat exchange ventilator 1.

  Further, although the control unit 11 includes the current detection unit 17, the current detection unit 17 may be provided separately from the control unit 11.

  Further, the control unit 11 detects and controls the rotation speed and current value of the supply motor and the exhaust motor, and controls to keep the supply air amount and the exhaust air amount constant. This is done to specify the position of = 0. Since it is not always necessary to specify the position of P = 0 in FIG. 2, constant air volume control that keeps the supply air volume and the exhaust air volume constant is not essential. If the constant air volume control is not performed, the position of P = 0 may not be specified, but the range of P> 0 (positive pressure) on the right side of the point of P = 0 in FIG. The target current value may be set in a range of (negative pressure). Alternatively, the target current value may be set as an arbitrary constant. In this case, the control unit 11 controls the air supply path 7 (or the exhaust path) so that the current value of the air supply motor (or the exhaust motor) detected by the current detection unit 17 is within a predetermined range of the target current value. 8) The opening area of the air volume adjusting damper provided in the inside may be changed. Furthermore, in this case, the control unit 11 controls the current value of the air supply motor (or exhaust motor) while controlling the rotation speed of the air supply motor (or exhaust motor) to be constant at a predetermined speed. The opening area of the air volume adjustment damper provided in the air supply path (or the exhaust path 8) may be changed so that is within a predetermined range of the target current value.

  In addition, when the air volume constant control is not performed, the rotational speeds of the air supply motor and the exhaust motor may not be detected. In this case, the control unit 11 detects the current value of the air supply motor (or the exhaust motor) and the opening area of the air volume adjustment damper (or the angle of the air volume adjustment damper).

  In the case where the air volume is not constantly controlled and the rotation speed detecting means (not shown) is provided, the current values of the air supply motor and the exhaust motor may not be detected. In this case, the control unit 11 detects the rotation speed of the air supply motor (or the exhaust motor) and the opening area of the air volume adjustment damper (or the angle of the air volume adjustment damper). For example, the control unit 11 operates the current value of the air supply motor (or the exhaust motor) at a constant value, and the rotational speed of the air supply motor (or the exhaust motor) falls within a predetermined range of the target rotational speed. In this way, the damper opening area (opening ratio) of the air volume adjusting damper 15 may be adjusted to determine the damper angle.

  Further, the control unit 11 causes the current value of the air supply motor (or the exhaust motor) to be the current value of the air supply motor (or the exhaust motor) that outputs a predetermined air volume at a predetermined external static pressure. The air volume adjusting damper 15 provided in the air supply path 7 or the air volume adjusting damper 16 provided in the exhaust path 8 may be operated.

The ventilator according to the present invention is also effective for applications such as a duct-type ventilator and a duct-type air conditioner for the purpose of exchanging heat between outside air and room air.

DESCRIPTION OF SYMBOLS 1 Heat exchange type ventilator 2 Outside air suction port 3 Indoor air exhaust port 4 Outside air inlet port 5 Indoor air inlet port 6 Heat exchange element 7 Air supply path 8 Exhaust path 9 Air supply fan 10 Exhaust air blower 11 Control part 12 Air Clean filter 13 Unitary air conditioning 14 Circulating air passage 15 Air volume adjustment damper 16 Air volume adjustment damper 17 Current detection means

Claims (4)

An air supply fan equipped with an air supply motor;
An exhaust fan equipped with an exhaust motor;
An air supply path to be blown indoors from the outside by the air supply fan;
An exhaust path for blowing air from the room to the outside by the exhaust fan;
A heat exchange element provided at a position where the air supply path and the exhaust path intersect, and for exchanging heat when ventilating indoor air and outdoor air;
In a heat exchange type ventilator provided with a current detection means for detecting a current flowing through the air supply motor,
The controller controls the rotation speed of the air supply motor,
The air supply path is connected to a circulation air path of unitary air conditioning,
The control unit changes an opening area of an air volume adjustment damper provided in the air supply path so that a current value of the air supply motor detected by the current detection unit is within a predetermined range of a target current value. A heat exchange type ventilator characterized in that The control unit controls the supply motor so that the rotation speed is constant at a predetermined rotation speed, so that the current value of the supply motor is within a predetermined range of a target current value. The heat exchange type ventilator according to claim 1, wherein an opening area of an air volume adjusting damper provided in the air supply path is changed. An air supply fan equipped with an air supply motor;
An exhaust fan equipped with an exhaust motor;
An air supply path to be blown indoors from the outside by the air supply fan;
An exhaust path for blowing air from the room to the outside by the exhaust fan;
A heat exchange element provided at a position where the air supply path and the exhaust path intersect, and for exchanging heat when ventilating indoor air and outdoor air;
In a heat exchange type ventilator provided with a current detection means for detecting a current flowing through an exhaust motor,
The control unit controls the rotation speed of the exhaust motor,
The exhaust path is connected to a circulation air path of unitary air conditioning,
The control unit changes an opening area of an air volume adjusting damper provided in the exhaust path so that a current value of the exhaust motor detected by the current detection unit is within a predetermined range of a target current value. A heat exchange type ventilator. The control section controls the exhaust path so that the current value of the exhaust motor is within a predetermined range of a target current value while controlling the rotation speed of the exhaust motor to be constant at a predetermined rotation speed. The heat exchange type ventilator according to claim 3, wherein an opening area of an air volume adjusting damper provided in the inside is changed.

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