JP2005300089A - Ventilator with air quantity correction function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilator with an air quantity correction function that can increase the control accuracy of an air quantity retaining operation by reducing the dispersion range of operating characteristic variations present in each individual product. <P>SOLUTION: The ventilator with an air quantity correction function comprises a damper 13 for fully closing an air duct during fan operation, a rotating speed detection circuit 19 for detecting the rotating speed of a DC fan motor, a motor voltage control circuit 20 for detecting a voltage applied to the DC fan motor, a pressure detection circuit 22 for detecting suction and supply pressures of the DC fan motor, data changing means for correcting standard P-Q data and standard N-Q data on the DC fan motor according to the values detected by the pressure detection circuit 22, the value detected by the motor voltage control circuit 20 and the value detected by the rotating speed detection circuit 19, and a microcomputer 16 for controlling an air quantity according to the corrected data. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention eliminates variations in the characteristics of the fan and motor, and corrects the ventilation air volume that fluctuates due to pressure loss that occurs in the air supply and exhaust structure such as a duct connected to the ventilation fan, and has an air volume correction function that always controls the air volume to the optimum level It relates to ventilation equipment.

  Conventionally, this type of ventilator with an air volume correction function is known to correct an air volume using a DC motor for a fan constituting the ventilator (see, for example, Patent Document 1).

  Hereinafter, the ventilation device with the air volume correction function will be described with reference to FIG.

  As shown in FIG. 6, reference numeral 101 denotes a DC fan motor equipped with a DC motor 102, and its discharge port 108 is connected to a duct 109 that guides indoor air to the outside. The rotation of the DC motor 102 is controlled by a control means 103 that controls energization of the stator windings according to the rotor position, and the rotation speed detection means 104 detects the rotation speed of the DC motor 102 based on the control state. Reference numeral 107 denotes an air volume instruction means for instructing the operating air volume of the DC fan motor 101 such as strong, medium, and weak, and stores the necessary rotational speed at each applied voltage to the DC motor 102 for realizing the operating air volume of strong, medium and weak. Means 106 stores it. Reference numeral 105 denotes voltage control means, which selects the number of revolutions for operating the DC fan motor 101 with the instructed air volume from the memory means 106 from the air volume instructed by the air volume instructing means 107 and the current applied voltage to the DC motor 102. After that, the selected rotational speed is compared with the current operating rotational speed detected by the rotational speed detecting means 104, and the applied voltage to the DC motor 102 is controlled so that the operational rotational speed is the same as the selected rotational speed. .

  Controlling the rotational speed of the fan motor by such a method is widely implemented as an effective means for securing the air volume when the pressure loss of the air passage differs depending on the installation conditions.

  Further, as an application of this method, as disclosed in Japanese Patent No. 3507156 (Patent Document 2), in a ventilating apparatus in which a plurality of air intake ducts are connected and multiple chambers are exhausted with a single fan, suction is performed for each air intake duct. If the resistance of the air passage on the side is different, the voltage applied to match the air volume will be different for each duct, so calculate the resistance of the air passage from this correction amount, and install a damper in each duct It is also practiced to adjust the amount of air in each duct by adjusting the damper opening.

  This technique will be further described with reference to FIG. FIG. 7 shows the characteristics of the fan motor. Static pressure-air volume and rotational speed-air volume can be expressed as characteristic curves with the air volume Q on the horizontal axis and the static pressure P and the rotational speed N on the vertical axis. (Hereinafter, the static pressure-air volume characteristic is referred to as PQ characteristic, and the rotation speed-air volume characteristic is referred to as NQ characteristic.) When the fan motor is operated at the standard voltage V, the air volume Q, the blown static pressure P, and the rotation speed N. Is determined in the state of pressure loss in the air passage, and the air volume Q can be obtained by measuring the rotational speed N. Furthermore, the fan static pressure P is obtained from the PQ characteristic, and the pressure loss of this air blowing system is represented as a resistance curve L. The resistance curve L is determined by the blowing resistance (pressure loss) such as the length of the duct, the bent part or the opening of the damper provided in the duct, and the intersection of the resistance curve L and the PQ characteristic curve is the operating point in this blowing system. It is.

  That is, at the standard voltage V0, the rotation speed = Na, the air volume = Qa, A on the PQ curve (V0) is the operating point, and the resistance curve L0 having this point as an intersection is determined. At this time, if the blowing resistance is increased, such as by slightly closing the damper provided in this duct, the resistance curve becomes L1, the operating point shifts to B on the PQ curve (V0), and the air volume decreases to Qb. At the same time, since the rotational speed is Nb, it can be seen that if the rotational speed is measured, the blowing resistance increases and the air volume decreases.

  Moreover, the pressure loss of a ventilation path is also known from the static pressure P value.

In order to ensure the air volume Qa even in the case of the resistance curve L1, it is only necessary to increase the motor output having the PQ (V1) characteristic in which the operating point on the resistance curve L1 is C. Since NQ (V1) characteristics are obtained at the time of this motor output, the rotational speed = Nc at this time. As a method of increasing the motor output, a method of simply increasing the applied voltage or switching an output tap obtained by changing the auxiliary winding of the motor winding with an induction motor is used.
Japanese Patent No. 3012721 (page 3, FIG. 1) Japanese Patent No. 3507156

  Thus, the correction data in the conventional ventilator with an air flow correction function are the PQ curve and NQ curve of the fan motor, and the resistance curve of the air passage is determined based on this data. Since the data of the PQ curve and the NQ curve is a standard value that is statistically calculated from the values of the population, there are naturally variations among individual products. This variation is caused by factors such as winding resistance due to motor characteristics, blade and casing assembly variations, and DC motor due to variations in the characteristics of power supply circuit components. It is estimated that about 10% of the motor input and about 15% of the airflow are generated at the specification point of the condition, that is, the maximum rating. Note that, as is apparent from the slopes of the PQ curve and the NQ curve, in the low air volume region, the displacement of the air flow Q is larger than the displacement of the rotational speed N, and the variation tends to increase. These are characteristics of products that are designed to fall within an acceptable range under the standard conditions and are production quality controlled. In actual use, factors of aging due to the use temperature environment and use period are added.

  However, in recent years, environmental efforts have been strengthened, and efficient operation of ventilation systems has been demanded, and regulations have been established regarding the minimum ventilation volume in order to maintain the indoor environment. There is a demand for less than now.

  The present invention solves such a conventional problem, and provides a ventilator with an air volume correction function that can suppress the range of operation characteristic variation existing for each product and increase the control accuracy of the air volume maintenance operation. It is intended to provide.

  In order to achieve the above object, the ventilator with an air volume correction function of the present invention is a fan closed static pressure detecting means for detecting a closed static pressure obtained by shielding the air passage during fan operation, and a fan rotational speed detection. And a voltage applied to the motor for rotating the fan, a value detected by the pressure detector, a value detected by the motor applied voltage detector, and a value detected by the rotation speed detector. Data changing means for correcting the standard PQ characteristic data and standard NQ data of the fan motor, and control means for controlling the air volume with the correction data are provided.

  By this means, the standard PQ data and the standard NQ data can be changed to the data specific to the device by the static pressure of the fan closing, and the standard value and the device specific value can be obtained by controlling the air flow based on this data. Therefore, a ventilation device with an air volume correction function can be obtained which can suppress the range of variation in operation characteristics existing for each product and increase the control accuracy of the air volume maintenance operation.

  In order to achieve the above object, the ventilator with an air flow correction function according to the present invention has a fan passage shielding means for fully closing a fan passage during fan operation, a DC fan motor equipped with a DC motor, Rotational speed detection means, applied voltage detection means for the motor, pressure detection means for detecting the pressure on the suction side and the discharge side of the fan motor, the value detected by the pressure detection means, and the motor applied voltage detection means Data changing means for correcting the standard PQ data and standard NQ data of the fan motor based on the detected value and the value detected by the rotation speed detecting means, and control means for controlling the air volume with the correction data It is equipped with.

  By this means, the standard PQ data and the standard NQ data can be changed to the data specific to the device by the static pressure of the fan closing, and the standard value and the device specific value can be obtained by controlling the air flow based on this data. Therefore, a ventilation device with an air volume correction function can be obtained which can suppress the range of variation in operation characteristics existing for each product and increase the control accuracy of the air volume maintenance operation.

  In order to achieve the above object, the ventilator with an air volume correction function of the present invention includes an air volume correction signal input means.

  By this means, the standard PQ data and standard NQ data can be changed to data specific to the device as appropriate, or when the correction conditions are met, and exist for each individual product. Thus, a ventilator with an air volume correction function capable of suppressing the range of variation in operating characteristics and improving the control accuracy of the air volume maintenance operation can be obtained.

  Further, the ventilator with an air flow correction function of the present invention comprises means for storing and outputting standard PQ data and standard NQ data, and a plurality of corrected data in order to achieve the above object. It is.

  By this means, the degree of correction can be clarified, and a ventilator with an air volume correction function that can increase the control accuracy of the air volume maintenance operation is obtained.

  Further, in order to achieve the above object, the ventilator with an air flow correction function of the present invention is configured for each intake duct in a ventilator that connects a plurality of intake ducts and exhausts multiple rooms with a single fan. Individual air volume storage means for storing the air volume, and opening / closing means for individually adjusting the opening area of each intake duct.

  By this means, the PQ data and the NQ data replaced with the data specific to the device are corrected by the values detected by the pressure detecting means, and respectively corresponding to the set air volume of each intake duct in the storage means. Ventilation system that can adjust the opening area of each air intake duct, suppress the range of operating characteristics variation existing for each product, connect multiple air intake ducts and exhaust multiple rooms with a single fan The ventilation apparatus with an air volume correction function capable of increasing the control accuracy of the air volume maintenance operation can be obtained.

  In order to achieve the above object, the ventilator with the air volume correction function of the present invention is configured to connect a plurality of intake ducts and exhaust a multi-chamber with a single fan. And an opening / closing means for individually adjusting the opening area of each intake duct.

  By this means, the PQ data and NQ data replaced with the data peculiar to the device are corrected by the values detected by the pressure detection means, the air volume of each intake duct is arbitrarily set, and The opening area of each duct can be adjusted according to the air volume of the intake duct, reducing the range of operating characteristics variation that exists for each product, and connecting multiple intake ducts to a single fan Even in a ventilator that exhausts a room, a ventilator with an air volume correction function that can increase the control accuracy of the air volume maintenance operation can be obtained.

  Further, in order to achieve the above object, the ventilator with an air volume correction function of the present invention is a ventilator that connects a plurality of intake ducts and exhausts a plurality of chambers with a single fan. Opening / closing means for individually adjusting the air passages are provided, and the air passages are fully closed by closing all the suction ports.

  By this means, the fan closing static pressure can be detected with the air passage fully closed, the standard PQ data and the standard NQ data can be changed to data specific to the device, and the air volume based on this data Since the deviation between the standard value and the device-specific value is almost eliminated by performing control, ventilation with an air volume correction function that suppresses the range of operation characteristic variations that exist for each product and increases the control accuracy of air volume maintenance operation. A device is obtained.

  Moreover, in order to achieve the said objective, the ventilation apparatus with an air volume correction | amendment function of this invention is equipped with the air volume up signal input part with respect to each duct, and a timer part, and it increases and operates air volume more than a setting air volume for a fixed time. .

  By this means, an operation with increased air volume can be performed for a certain period of time, and a ventilator with an air volume correction function capable of increasing the control accuracy of the air volume maintenance operation can be obtained.

  In order to achieve the above object, the ventilator with an air volume correction function of the present invention is configured to connect a plurality of intake ducts and exhaust a multi-chamber with a single fan. An input part is provided, and an arbitrary duct is shielded to stop blowing.

  By this means, it is possible to obtain a ventilator with an air volume correction function that can appropriately shut off the ducts to stop the air flow and increase the control accuracy of the air volume maintenance operation.

  In order to achieve the above object, the ventilator with an air flow correction function of the present invention is configured to input an interlocking signal to each duct in a ventilator that connects a plurality of intake ducts and exhausts multiple rooms with a single fan. Opening / closing means for individually adjusting the output section and the opening area of each of the intake ducts is provided, and the opening / closing means is adjusted and controlled in accordance with the interlocking device.

  By this means, when an interlocking device is installed in a plurality of ducts, the opening area of each intake duct can be adjusted according to the characteristics of the interlocking device, and ventilation with an airflow correction function that can increase the control accuracy of the airflow maintenance operation A device is obtained.

  Moreover, in order to achieve the said objective, the ventilator with the air volume correction function of this invention is equipped with a sensor abnormality display means, and compares the pressure of a blowing side and a suction side at the time of an operation stop, and displays a sensor abnormality.

  By this means, a ventilator with an air volume correction function that can periodically self-diagnose the presence or absence of sensor abnormalities, suppress the range of operation characteristics variation that exists for each product, and increase the control accuracy of the air volume maintenance operation is provided. can get.

  In order to achieve the above object, the ventilator with an air flow correction function of the present invention stores ventilation air flow lowering display means, fan motor suction side and blow side pressure values and fan motor operating characteristic values during initial operation. Means for appropriately detecting the pressure values on the suction side and the blow side of the fan motor and the fan motor operation characteristic value during operation, and displaying a decrease in the ventilation air volume.

  By this means, it can be displayed when the ventilation resistance increases due to increased air flow resistance, such as when the filter is clogged, and the range of operation characteristics variation existing for each product is suppressed, and the control accuracy of the air volume maintenance operation A ventilation device with an air volume correction function that can increase the air flow is obtained.

  Moreover, in order to achieve the said objective, the ventilation apparatus with an air volume correction | amendment function of this invention is equipped with a ventilation air volume abnormality display part and a regulation air volume memory | storage part, and displays an abnormality when it becomes below a regulation air volume.

  By this means, a ventilator with an air volume correction function that can be displayed when the air volume falls below the specified air volume, suppresses the range of operation characteristic variation existing for each product, and can increase the control accuracy of the air volume maintenance operation is provided. can get.

  ADVANTAGE OF THE INVENTION According to this invention, the ventilation apparatus with an air volume correction | amendment function which can control air volume maintenance driving | operation based on the driving | operation characteristic which exists for every product, and can raise an air volume control precision can be provided. .

  Further, according to the present invention, since the correction operation can be performed after the air passage is reliably blocked by the man interface, it is possible to provide a ventilator with an air volume correction function which has an effect that the correction can be reliably performed.

  In addition, according to the present invention, the validity of the correction can be determined by comparing the corrected data with the standard PQ data and the standard NQ data. Further, for example, when the motor is shut off at the motor outlet, By comparing the data with the case where the tip is shielded, it is possible to provide a ventilation device with an air volume correction function that is effective in analyzing ventilation ventilation devices utilizing data, such as knowing air leakage in the duct.

  Further, according to the present invention, in a ventilator that connects a plurality of intake ducts and exhausts multiple rooms with a single fan, the accuracy is improved in a low wind region, and even in the initial data, the individual air volume setting at each installation location However, it is possible to provide a ventilator with an air flow correction function that has an effect of improving the air flow control accuracy for each intake duct.

  In addition, according to the present invention, it is possible to provide a ventilator with an air volume correction function that has an effect of closing all the air inlets and simply shielding the air passage to correct the data.

  Further, according to the present invention, it is possible to provide a ventilator with an air volume correction function that has an advantageous effect and can be operated by increasing the air volume more accurately than the set air volume for a certain period of time.

  In addition, according to the present invention, it is possible to provide a ventilator with an air volume correction function that has an advantageous effect of blocking an arbitrary duct and stopping air blowing.

  In addition, according to the present invention, when the ventilator and other devices are systematized and linked to each other, the damper opening is adjusted and the control according to the linked device can be performed with high accuracy in the air volume. A ventilator with an air flow correction function can be provided.

  In addition, according to the present invention, since the malfunction of the sensor is clarified by the sensor abnormality display, it is possible to provide a ventilator with an air volume correction function that has an effect of improving the reliability of the facility.

  In addition, according to the present invention, it is possible to provide a ventilation device with an air volume correction function in which the cleaning time of the filter is accurately displayed by the ventilation air volume reduction display and the maintainability of the facility is enhanced.

  Further, according to the present invention, it is possible to provide a ventilator with an air volume correction function that is displayed with high accuracy when the air volume falls below the specified air volume and has an effect of improving the reliability of the equipment.

The invention according to claim 1 of the present invention is a fan closed static pressure detecting means for detecting a closed static pressure obtained by shielding the air passage during fan operation, a fan closed speed detecting means, and a fan rotation. A standard P− of this fan motor by means of an applied voltage detecting means for the motor to be driven, a value detected by the pressure detecting means, a value detected by the motor applied voltage detecting means, and a value detected by the rotational speed detecting means. Data changing means for correcting the Q data and standard NQ data, and a control means for controlling the air volume with the correction data, the static static pressure at the air volume = 0 m ³ / h, the fan rotation speed, and Since the value of the fan applied voltage at that time is obtained, the PQ curve and the NQ curve are corrected with the obtained value, and the standard PQ data and the standard NQ data are obtained for the device. It has the effect of adjusting the air volume in the changed data along with the change in the over data.

Further, the invention according to claim 2 of the present invention is characterized in that the air passage shielding means for fully closing the air passage during the fan operation, the DC fan motor equipped with the DC motor, the rotational speed detection means of the motor, Applied voltage detection means of the motor, pressure detection means for detecting the pressure on the suction side and the discharge side of the fan motor, a value detected by the pressure detection means, a value detected by the motor applied voltage detection means, and the rotation A data changing means for correcting the standard PQ data and standard NQ data of the fan motor based on the value detected by the number detecting means, and a control means for controlling the air volume with the correction data. since閉切static pressure and the fan speed for air volume = 0 m ³ / h and the value of the fan voltage applied at that time is obtained, P-Q curve and N-Q curve at this resulting value It is possible to correct and change the standard PQ data and standard NQ data to the characteristic data of this device. Furthermore, from the static pressure when the air passage is fully open, the data peculiar to this device which has been corrected previously is 2 It has the effect | action which obtains the resistance curve data of a ventilation system while performing next correction | amendment.

Further, the invention according to claim 3 of the present invention is provided with an air flow correction signal input means, and when the air flow correction signal is inputted, at that time, the closed static pressure at the air flow = 0 m ³ / h, the fan rotation speed, and its Measure the fan applied voltage at the time, correct the PQ curve and NQ curve with the obtained values, change the standard PQ data and standard NQ data to data specific to this equipment and It has the effect of adjusting the air volume with the change data.

  According to a fourth aspect of the present invention, there is provided means for outputting standard PQ data and standard NQ data and corrected data, respectively, and the standard PQ data and standard N-Q data are output. Q data and corrected data contents are output, and a plurality of correction data are also output.

  Further, according to a fifth aspect of the present invention, in the ventilator with an air volume correction function according to the first or second aspect, the ventilation is performed such that a plurality of air intake ducts are connected to exhaust a multi-chamber with a single fan. 7. An apparatus according to claim 6, comprising individual air volume storage means for storing a set air volume for each intake duct, and opening / closing means for individually adjusting an opening area of each intake duct. Is equipped with input means to set the individual air volume. In either case, based on the individual air volume data, the duct damper, which is the maximum air volume of this individual air volume, is opened fully and the air volume is measured. Then, for the other set air volume ducts, by adjusting the opening so that the damper opening is proportionally distributed with the maximum air volume, the area of each duct is adjusted according to the set air volume of each intake duct As well as It has an effect of the static pressure detected by the pressure detecting means, obtaining the resistance curve data of the air system of the individual ducts as well as third order corrected this device specific data correction first.

  According to a seventh aspect of the present invention, there is provided a ventilator for connecting a plurality of air intake ducts and exhausting a plurality of chambers with a single fan, and an opening / closing means for individually adjusting an opening area of each of the suction ports. The air passage is fully closed by closing all the suction ports, and the fan closing static pressure can be detected by fully closing the air passage, and the standard PQ data and the standard NQ The data can be changed to data specific to the device.By controlling the air flow based on this data, the deviation between the standard value and the device specific value is almost eliminated. It has the effect of suppressing the range and increasing the control accuracy of the air volume maintenance operation.

  The invention according to claim 8 of the present invention includes an air volume up signal input section and a timer section for each duct, and when the air volume up signal is input, the operation for increasing the air volume is controlled by the timer section. It has the action.

  The invention according to claim 9 of the present invention is the ventilator with an air volume correction function according to any one of claims 5 to 7, further comprising an air volume stop signal input section for each duct, and an air volume stop signal is input. The damper of the made duct is fully opened to stop the intake from here.

  Further, the invention according to claim 10 of the present invention is the ventilator with an air volume correction function according to claims 5 to 7, further comprising an interlocking signal input / output unit, and each duct when an interlocking operation signal is inputted. It adjusts the opening area of and outputs the state to control it according to the interlocking device.

  Further, the invention described in claim 11 of the present invention is the ventilator with an air volume correction function according to claims 1, 2, 5, 6 and 7, comprising a sensor abnormality display means, If the pressure on the suction side is detected and this data is compared, if there is a difference, one of the sensors is judged to be abnormal and the sensor abnormality is displayed.

  According to a twelfth aspect of the present invention, in the ventilator with an air volume correction function according to any one of the first, second, fifth, sixth and seventh aspects, the ventilation air volume lowering display means and the suction side of the fan motor during initial operation are provided. And means for storing the pressure value on the blowout side and the fan motor operating characteristic value. During operation, the pressure value on the suction side and the blower side of the fan motor and the fan motor operating characteristic value are detected as appropriate. And has a function of displaying a decrease in ventilation air volume when the difference is greater than an arbitrary difference.

  The invention described in claim 13 of the present invention is the ventilator with an air volume correction function according to any of claims 1, 2, 5, 6 and 7, comprising a ventilation air volume abnormality display section and a specified air volume storage section. This value is constantly monitored, and has an effect of displaying an abnormality when the air volume falls below the specified air volume.

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

(Embodiment 1)
FIG. 1 shows an installation configuration diagram of the present invention. As shown in FIG. 1, a ventilator main body 1 is installed on a ceiling 3 by a suspension bolt 2. One exhaust adapter 4 and a plurality of intake adapters 5 are provided on the side surface of the ventilator main body 1, and a DC fan motor (not shown) is provided as a single air blower inside the ventilator main body 1. ing. The exhaust adapter 4 communicates with an exhaust port 7 which is an opening provided outdoors through an exhaust duct 6, and the intake adapter 5 is provided in a room such as a toilet, a bathroom, and a washroom through an intake duct 8. Communicated with the intake port 9. When the ventilator body 1 is operated, air is blown and ventilated as indicated by the streamline arrow 10.

  FIG. 2 is a perspective view of the ventilator main body part. As shown in FIG. 2, the ventilator main body 1 has a ceiling bolt 3 (not shown) with a hanging bolt 2 (not shown) using a hanging bracket 11. The exhaust pressure sensor 12 is attached to the exhaust adapter 4 provided in the ventilator body 1 so that the pressure inside the exhaust adapter 4 can be detected as the blow side pressure. In addition, as long as the blowing pressure of the fan can be measured by the blowing pressure sensor 12, it may not be attached at this position.

  Further, the intake adapter 5 is provided with a damper 13 as a ventilation path shielding means, and a stepping motor 14 is installed in the damper 13 so as to be interlocked. A suction pressure sensor 15 is attached to the intake adapter 5, but this place is preferably located on the fan suction side when the air passage is blocked by the damper 13. If it can measure, it does not need to be attached at this position.

  FIG. 3 is a block diagram of the control circuit of the present invention. As shown in FIG. 3, the main control of the present invention is carried out by a microcomputer 16 which is a device-mounted microcomputer that performs an input signal calculation process and outputs an output signal as a control means. Is called. The DC motor 17 is operated by a DC motor control circuit 18 and a rotation speed detection circuit 19 and is provided with a motor voltage control circuit 20 that adjusts the voltage applied to the DC motor. These control circuits are all provided in the microcomputer 16. It is connected to the.

  Further, the microcomputer 16 is connected to a circuit for driving the stepping motor 14 provided in each of the plurality of intake adapters 5, but as an example for the three rooms, a stepping motor provided in a system for intake from the bathroom (a intake system) Stepping motor drive circuit 21a is provided in 14a, stepping motor drive circuit 21b is provided in a stepping motor 14b provided in a system for intake from a toilet (b intake system), and a system (c intake system) for intake from a bathroom. A stepping motor drive circuit 21c is connected to the stepping motor 14c.

  Further, the blowing pressure sensor 12 and the suction pressure sensor 15 are connected to the microcomputer 16 via a pressure detection circuit 22, and a differential pressure between the blowing pressure sensor 12 and the suction pressure sensor 15 is measured as an operating static pressure.

  The microcomputer 16 is connected with a data storage unit 23 and a data output circuit 24 for outputting stored data to the outside.

  Also, an air volume correction switch 25 is connected as an air volume correction signal input means to the microcomputer 16 via an air volume correction input circuit 26, and as an input means for setting the air volume for each intake duct, the air volume setting switches 27a and 27b of the a intake system. The air volume setting switch 27b for the intake system and the air volume setting switch 27c for the intake system are connected via the individual air volume setting input circuit 28, and the specified normal ventilation operation and the normal ventilation operation are switched, and each intake duct is The air volume adjustment switch 29a for the intake system, the air volume adjustment switch 29b for the intake system, and the air volume adjustment switch 29c for the intake system are connected via the individual air volume adjustment input circuit 30 as the air volume up signal input section and the air volume stop signal input section. And an interlocking signal input / output unit 31 for exchanging signals in conjunction with interlocking devices, and Sensor fault display LED33 and ventilation power reduction LED34 and ventilation power abnormality LED35 through the ED lighting circuit 32 are connected.

FIG. 4 shows an embodiment of an initial characteristic data table of standard PQ characteristics and standard NQ characteristics stored in advance in the microcomputer 16 or the data storage unit 23, in which the voltage V is a DC motor. When the applied voltage value is appropriately set, the air blower circuit is shielded and the air volume is 0 [m ³ / h], that is, Qs, and the exhaust adapter 4 and the intake adapter 5 are ahead of each other. When the air volume Qo [m ³ / h] is in an open and no-load state, and during this time, the air volume Q is unambiguously divided into air volumes Q1, Q2, Q3, ... [m ³ / h], and the fan speed N A standard PQ curve and a standard NQ curve are tabulated as representative point data by [rpm] and fan static pressure P [Pa].

FIG. 5 shows an embodiment of the air volume table for each intake system stored in the microcomputer 16 or the data storage unit 23 in advance. FIG. 5 is a data table in which the air volume adjustment state is a data table of the air blowing amount and the total air blowing amount with respect to the operation state set for each intake system, and the operation setting for each intake system indicates a forced stop state. There are “X”, “△” indicating the normal ventilation operation state, “○” indicating the normal ventilation operation state, and “◎” indicating the air volume up operation state, so the setting of each system for the combination of these states The air volume and the total air volume are assigned. It is desirable that the operation time can be arbitrarily set by using a microcomputer timer for the air volume up operation “◎”. In other words, the air volume up operation is started and the timer count is started. When the timer count ends, the normal ventilation operation “O” or the specified ventilation operation “△” is returned, and the operation time is an automatically determined automatic operation. Either of them may be provided with a circuit (not shown) for setting the motor immersion time. This data is preset at the time of product design, and the air volume is stored in the initial air volume data table, and the setting corresponding to each installation site is input from the individual air volume setting input circuit 28. A similar data format is created and stored in the data storage unit 23 as a data table. In the figure, the total value of ventilation air volume in data Nos. 1 to 4 is 75m ³ / h, which is constant regardless of the air volume adjustment state, but this value is the minimum required ventilation volume based on regulations, and this ventilation volume is secured. It must be. To give a specific example, in a highly airtight house, etc., when the constant ventilation volume conforming to the Building Standard Law is ventilated from the sanitary zone of a toilet, bathroom, or washroom, the applicable total floor area is 60 m ² and the applicable ceiling height is When the length is 2.5 m and the specification of building materials requires 0.5 ventilation times per hour, the constant ventilation air volume in the toilet, bathroom, and washroom will be 25 m ³ / h each. Here, from the design standards of the Housing Urban Development Corporation, toilets are set to 50 m ³ / h or more due to odor emissions, bathrooms are also 70 m ³ / h or more from bathroom drying, etc., and the bathroom is set to 50 m ³ / h. It has been.

  In the above configuration, when the power is turned on, the microcomputer 16 first executes an air volume correction program. This air volume correction program uses the format of the data table of FIG. 4 and stores the fan rotation speed Ns1 [rpm obtained from the rotation speed detection circuit as data at the time of the air volume Qs in the correction characteristic data table that has been made empty data in advance. ] And the difference Ps1 [Pa] between the detected values of the blowout pressure sensor 12 and the suction pressure sensor 15 obtained from the pressure detection circuit 22 are stored in the table column as the closed static pressure unique to the device of the ventilator body 1, and this From the data, the fan rotation speed and the operating static pressure of Q1, Q2, Q3,... Are appropriately corrected and changed. In this correction, since there is little variation in the air volume Qo in the no-load state from the experience, the initial value data may be used as it is in the correction characteristic data table, but it is preferably corrected based on the analysis of the variation factor. The method is predetermined. When the power is turned on, for example, if the blow grill opening is closed and the blower circuit is shielded, the PQ characteristic and NQ characteristic specific to the device are stored as correction characteristic data by the above program.

  If the program for closing all the dampers by driving all the stepping motors is operated along with the air volume correction program, the work of shielding the air blowing circuit as described above is unnecessary. In addition, when the air volume correction input switch is pressed, a program for performing the above correction operation is also provided, and air volume correction can be performed as appropriate.

  When the internal stepping motor is driven, an operation for reliably performing the damper operation is performed. This operation resets the damper position. Specifically, a stopper or the like is provided so that the damper stops structurally at a position where the damper is fully closed (not shown), and the damper exceeds the required operating angle. The stepping motor is moved so as to rotate, and the damper is securely applied to the stopper to ensure the fully closed position. As a means for reliably performing another operation method, a limit switch (not shown) may be provided at the damper closed position. In this method, the signal generated from the limit switch is input to the control device, so that the normal operation of the intake adapter is confirmed, and the point where the limit switch is turned on is the position where the damper is fully closed and the stepping motor and limit A reliable damper angle can always be generated by the switch. Both are essential items for carrying out the present invention.

  Next, an operation is performed in which the intake adapters of the a intake system (bathroom), b intake system (toilet), and c intake system (toilet) are fully opened to correct and determine the resistance curve of each system. That is, a constant voltage is applied to the DC fan motor, preferably applied in accordance with a voltage value such as V1 described in the initial characteristic data table of FIG. 4, and in this state, only the damper of the a intake system is first fully opened. Measure the operating static pressure and add the data part to the correction characteristic data table. Subsequently, the damper of the a intake system is fully closed, and the same operation is performed in the b system and the c system. As a result, the resistance curves of the respective intake systems are stored in the data storage unit 23 as intake resistance data. At the same time, since the static pressure can be measured in the operation of determining the resistance curve, the correction characteristic data table is secondarily corrected using this data, and the correction characteristic data table is rewritten. The correction operation may be performed for all voltages V1, V2,..., Or may be omitted as appropriate.

  When the resistance curve is determined, the operation to determine the damper opening of each intake system in order to achieve the ventilation rate set in the data table of the air flow to each intake system and the total air flow for the operating state of each intake system To implement. That is, the air volume is distributed according to the difference in the airflow resistance of each intake system, but the resistance of each intake system varies depending on the form of the installation site. Therefore, the resistance is added by changing the damper opening and is distributed correctly. In addition, based on this when the data table is only the initial air volume data table, and based on this when the individual air volume data table is created at the site, the damper setting method is the same.

One embodiment of the operation of determining the damper opening is performed for each air volume data number shown in FIG. 5 to determine the damper opening, and the damper opening table corresponding to the air volume data number is stored in the data storage unit 23. The operation for each air volume data is the same. That is,
1. For each air volume data number, only the damper of the intake system whose air volume is set to the maximum among them is fully opened.
2. If there are multiple systems with the maximum airflow setting, only the intake system with a large intake resistance data is fully opened. This maximum air volume is defined as QL.
3. Fully open only the damper of the intake system with the maximum airflow determined in 1 and 2, apply an arbitrary voltage, preferably a high voltage that is unlikely to cause an error, to the DC fan motor and blow, refer to the correction characteristic data table The correction air volume Ql of the lever system is obtained.
Close the damper of 4.3, and then gradually open the damper of the intake system with a large air volume. If the set air volume of this intake system is QM, the air volume Qm of this system opens until the ratio of Ql to QL is equal to the ratio of Qm to QM, that is, until the air volume Qm = Ql × QM / QL. Yes, the damper opening at this time is stored.
Close the damper of 5.4, and gradually open the damper of the last intake system. If the set air volume of this intake system is QS, the air volume Qs of this system is opened until the air volume Qs = Ql × QM / QL in the same manner as 3, and the damper opening is stored.
Since the duct opening degree of each intake system is determined by the operations of 6.1 to 5, the damper opening degree table corresponding to the air volume data number is stored in the data storage unit 23.
7). When the dampers are opened at the respective damper openings, the air is blown to all the intake systems, and the operation is performed while adjusting the applied voltage of the DC motor while referring to the correction characteristic data table, the operation can be performed with all the set air volumes. This applied voltage is also stored in the data storage unit 23 as a voltage corresponding to the air volume data number.
The above operation is repeated for each air volume data number, and is stored in the data storage unit 23 as a damper opening degree table corresponding to the air volume data number.
When an interlocking device is provided and a signal indicating that the interlocking device is operating is input to the interlocking signal input / output unit 31 shown in FIG. 3, the damper opening of the intake system to which the interlocking device is connected is fully opened. At the same time, the output signal is returned to the interlocking device in conjunction with the input signal.
As described above, correction characteristic data is created prior to the start of equipment operation, the damper opening corresponding to the air volume data number and the applied voltage are stored as data, and the fan is detected while detecting the rotational speed or the operating static pressure as before. The motor is operated to adjust the voltage applied to the motor and maintain an appropriate air volume. Further, for example, a personal computer is connected to the data output circuit 24 for outputting stored data to the outside, and standard PQ data and standard NQ data and a plurality of corrected data are output as text or printed out. By doing so, it is possible to clearly grasp the degree of correction of data numerically.

  Further, the microcomputer 16 temporarily stops the operation in an arbitrary cycle as a sensor abnormality display means, detects the differential pressure between the blowing pressure sensor 12 and the suction pressure sensor 15, and resumes the operation when the differential pressure difference is almost eliminated. If the pressure difference does not almost disappear within a preset time, there is a program to output to the LED lighting circuit to turn on the sensor abnormality display LED and restart the operation. This avoids problems such as deterioration and deterioration.

  In addition, in the microcomputer 16, during normal operation in which voltage adjustment is performed as a ventilation air flow reduction display means, the applied voltage at the time of the correction operation stored corresponding to the air flow data number is used as initial data, and this value and the current value. When a voltage difference greater than a preset value is adjusted, a program is provided to output to the LED lighting circuit and turn on the ventilation air volume display LED. This is to avoid the problem that the air volume cannot be secured.

  In addition, the microcomputer 16 always refers to the specified ventilation air volume and the current air volume from the correction characteristic data as a ventilation air volume abnormality display means, and when the ventilation volume falls below the specified air volume, outputs it to the LED lighting circuit to light the ventilation air volume display LED. A program is provided to avoid an abnormal condition where the specified ventilation volume cannot be secured.

  In this embodiment, a DC fan motor is used as a single blower. However, if a unit that can adjust the applied power supply is provided even if it is an AC motor and this unit is adjusted by a microcomputer, its effect can be obtained. No difference.

  In addition to installing pressure sensors on the fan blow-out side and the suction side, connecting a plurality of intake ducts and attaching a damper that adjusts the opening of this duct to an intake duct that exhausts multiple chambers with a single fan, Appropriate air volume distribution can be implemented for the application, which is useful.

Installation form figure which shows the ventilator with the air volume correction function of Embodiment 1 of this invention Perspective view of the body part of the ventilation device with the same air volume correction function Block diagram of the control circuit of a ventilator with the same air volume correction function Characteristics table of the control circuit of a ventilator with the same air volume correction function Air volume table of the control circuit of a ventilator with the same air volume correction function Block diagram showing the control circuit of a conventional ventilator with an air flow correction function Characteristics of fan motor of conventional ventilator with air flow function

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ventilator body 12 Blowout pressure sensor 13 Damper 15 Suction pressure sensor 16 Microcomputer 17 DC motor 19 Rotation speed detection circuit 20 Motor voltage control circuit 23 Data storage part

Claims (13)

To fan closed static pressure detecting means for detecting closed static pressure obtained by shielding the air passage during fan operation, fan rotation speed detecting means for detecting the fan rotation speed, and a motor for rotating the fan Applied voltage detecting means for detecting the applied voltage, a value detected by the fan closing static pressure detecting means, a value detected by the applied voltage detecting means, and a value detected by the fan rotation speed detecting means A ventilator with an air volume correction function, comprising data changing means for correcting the standard PQ data and standard NQ data of the fan, and a control means for controlling the air volume with the correction data. The air passage shielding means for fully closing the air passage during the fan operation, the DC fan motor equipped with the DC motor, the rotational speed detection means for detecting the rotational speed of the DC fan motor, and the application to the DC fan motor Applied voltage detecting means for detecting voltage, pressure detecting means for detecting pressure on the suction side and outlet side of the DC fan motor, a value detected by the pressure detecting means, and a value detected by the applied voltage detecting means And a data changing means for correcting the standard PQ data and standard NQ data of the DC fan motor based on the value detected by the rotation speed detecting means, and a control means for controlling the air volume with the correction data. Ventilation device with air flow correction function. The ventilation apparatus with an air volume correction function according to claim 1 or 2, further comprising an air volume correction signal input means. The ventilator with an air flow correction function according to claim 1 or 2, further comprising means for outputting standard PQ data and standard NQ data and data obtained by correcting each of the standard PQ data and standard NQ data. Connect multiple intake ducts to exhaust multiple chambers with a single fan, and individually open air volume storage means that stores the set air volume for each intake duct, and open / close to adjust the opening area of each intake duct individually And an opening area of each duct is adjusted in accordance with a set air volume of each intake duct according to a value detected by the fan closed static pressure detecting means or the pressure detecting means. Or the ventilation apparatus with the airflow correction function of 2 or 2. A plurality of intake ducts are connected to exhaust a plurality of chambers with a single fan, and an air volume input means for setting the air volume for each intake duct, and an opening / closing means for individually adjusting the opening area of each intake duct; And an opening area of each duct is adjusted in accordance with a set air volume of each intake duct according to a value detected by the fan closed static pressure detecting means or the pressure detecting means. Ventilation device with air flow correction function as described. Connect multiple intake ducts to exhaust multiple chambers with a single fan, and include opening / closing means to individually adjust the opening area of the intake port of each intake duct, and close all the intake ports The ventilator with an air volume correction function according to claim 1 or 2, wherein the air passage is fully closed. 8. Ventilation with an air volume correction function according to claim 5, comprising an air volume up signal input means and a timer means for each intake duct, and configured to operate by increasing the air volume from a set air volume for a certain period of time. apparatus. The ventilator with an air volume correction function according to any one of claims 5, 6 and 7, further comprising an air volume stop signal input means for each intake duct, wherein the air duct is stopped by shielding an arbitrary duct. 8. A configuration in which an interlocking signal input / output unit is provided and the opening area of each intake duct is individually adjusted to adjust the opening area of the duct to perform control in accordance with the interlocking device. The ventilation apparatus with an airflow correction function according to any one of the above. A sensor abnormality display means is provided, and the pressure detection means for detecting the pressure on the suction side and the blow side of the fan motor is configured to display the sensor abnormality by comparing the pressure on the blow side and the suction side when the operation is stopped. The ventilator with an air volume correction function according to any one of 2, 5, 6, and 7. Ventilation air flow reduction display means, and means for storing the fan motor suction side and outlet side pressure values and fan motor operating characteristic values during initial operation, and the fan motor suction side and outlet side pressure values as appropriate during operation The ventilator with an air volume correction function according to any one of claims 1, 2, 5, 6, and 7, wherein a decrease in the ventilation air volume is displayed by detecting a fan motor operation characteristic value. The air volume correction according to any one of claims 1, 2, 5, 6 and 7, comprising a ventilation air volume abnormality display means and a specified air volume storage means, wherein the abnormality display is performed when the air volume becomes below the specified air volume. Ventilator with function.

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