JP4130788B2 - Ventilation equipment - Google Patents

Description

  The present invention relates to a ventilation device for ventilating a room.

  DESCRIPTION OF RELATED ART Conventionally, the ventilation apparatus for gas ranges of a kitchen which performs ventilation by determining ventilation load is known (for example, refer patent document 1).

  The ventilation device includes a ventilation fan, a motor that drives the ventilation fan, and a control device that controls the motor. The control device is configured to calculate an actual power value of the motor when the ventilation fan is driven at a preset first rotational speed and an actual power value of the motor when the ventilation fan is driven at a preset second rotational speed. Ventilation load determination means for determining which of a plurality of ventilation loads classified in advance based on the difference, and a rotation speed correction means for correcting the rotation speed of the motor based on the ventilation load determined as the target air volume With.

However, in the above ventilator, since it is necessary to rotate the ventilation fan at the first rotation speed and the second rotation speed in order to detect the ventilation load, the ventilation load cannot always be determined during the ventilation operation. Appropriate air volume may not be obtained due to fluctuations in ventilation load during ventilation operation.
JP 2002-349478 A (page 2-3, FIG. 1)

  The present invention has been made in view of the above background, and an object of the present invention is to provide a ventilator capable of obtaining a required set air volume even when the ventilation load fluctuates during ventilation operation.

First, a ventilator as a premise of the present invention is a ventilator that ventilates a room by a ventilation fan, and obtains the ventilation air volume set by the setting means for setting the ventilation air volume of the room and the setting means. Reference speed calculation means for determining the required reference speed of the ventilation fan, and motor reference required to drive the ventilation fan at the same speed as the current speed when the ventilation load is a predetermined reference load Correction amount calculation means for obtaining a correction amount corresponding to a change in the ventilation load based on the electric power value and the actual electric power value of the motor at the present time, and the target rotation of the ventilation fan by correcting the reference rotation speed according to the correction amount Target rotation number calculating means for determining the number, and fan control means for controlling the rotation speed of the ventilation fan so that the rotation speed matches the target rotation speed.

  For example, when the ventilation load is a predetermined reference load, as shown in the correlation between the rotation speed and the power value shown in the graph of FIG. 5, the relationship between the rotation speed and the power value as indicated by a solid line a is used. Suppose there was. However, if the ventilation load increases due to the clogging of dust in the exhaust passage or the like, the ventilation air volume decreases and the work of the ventilation fan decreases, so the power value of the motor at the same rotation speed of the ventilation fan also decreases. That is, the correlation between the rotation speed and the power value is indicated by a dotted line b, for example.

For this reason , in the ventilator, the reference power value of the motor required to drive the ventilation fan at the same rotation speed as the current rotation speed when the ventilation load is a predetermined reference load is calculated by the correction amount calculation means. Then, a correction amount corresponding to the change in the ventilation load is obtained based on the current actual power value of the motor. Then, the target rotational speed calculation means corrects the reference rotational speed according to the determined correction amount to determine the target rotational speed of the ventilation fan.

  According to this configuration, the correction amount corresponding to the change in the ventilation load can be obtained based on the reference power value stored and held in advance and the current actual power value of the motor. Therefore, a required set air volume can be obtained even if the ventilation load varies during the ventilation operation.

  By the way, when ventilating a plurality of rooms at the same time with the ventilator configured in this way, the ratio of the ventilation air volume of the plurality of rooms is provided in each ventilation path that freely connects each room and the ventilation fan. If the setting is changed by adjusting the opening of a damper or the like, an appropriate ventilation air volume may not be obtained.

Therefore, in the present invention, there is provided a ventilator to perform ventilation of the plurality of rooms with a single ventilation fan, set the total ventilation air volume of the plurality of chambers, and a ratio of the ventilation power of the plurality of chambers The ratio of the ventilation air flow rate of the plurality of rooms set by the setting means is set to the opening degree of the ventilation path that communicates the setting means with one or more predetermined rooms of the plurality of rooms and the ventilation fan. The opening degree adjusting means that can be adjusted according to the reference, the reference rotational speed calculating means for obtaining the reference rotational speed of the ventilation fan required to obtain the total ventilation air volume set by the setting means, and the ventilation load is a predetermined reference load Sometimes the correction amount corresponding to the change in ventilation load is based on the reference power value of the motor required to drive the ventilation fan at the same rotation speed as the current speed and the actual power value of the current motor. The correction amount calculation means to be obtained and the reference rotation according to the correction amount The target rotational speed calculating means for correcting the number to obtain the target rotational speed of the ventilation fan and the fan control means for controlling the rotational speed of the ventilation fan so that the rotational speed matches the target rotational speed are set by the setting means. The reference power value of the motor corresponding to each rotation speed of the ventilation fan is stored and stored separately for each setting ratio of the ventilation airflow of a plurality of rooms, and according to the setting change of the ratio of the ventilation airflow of the plurality of rooms The reference power value of the motor corresponding to each rotation speed of the ventilation fan is changed.

  When the setting ratio of the ventilation air volume in a plurality of rooms is changed, the ventilation load on the suction side of the ventilation fan changes due to differences in the size of each room and the degree of sealing. For this reason, if the motor reference power value corresponding to each rotation speed of the ventilation fan is uniquely determined, changing the ventilation air volume setting ratio in multiple rooms will make it difficult to obtain a correction value, and the appropriate air volume will be obtained. Cannot be obtained.

  On the other hand, in this invention comprised as mentioned above, the reference electric power value of the motor corresponding to each rotation speed of a ventilation fan is memorize | stored and distinguished for every setting ratio of the ventilation air volume of several rooms. And since the said reference electric power value of the motor corresponding to each rotation speed of a ventilation fan is changed according to the setting change of the ratio of the ventilation airflow of a plurality of rooms, the ratio of the ventilation airflow of a plurality of rooms is changed. However, it is possible to obtain an appropriate correction amount and perform ventilation with a required set air volume.

  Note that when ventilating multiple rooms, the ventilation load varies from room to room, so even if the total ventilation volume is equal to the target ventilation volume, the ratio of the ventilation volume in multiple rooms does not match the set ratio. There is a case. That is, only a ventilation air volume below the set ratio can be obtained from a room with a high ventilation load, and a ventilation air volume above the set ratio may be obtained from a room with a low ventilation load.

Therefore, the ventilator is a by rotating the ventilation fan at the Jo Tokoro rotation speed actual power value of the motor when the ventilated individually each predetermined room, each predetermined by dividing a predetermined set power value The opening correction coefficient for each room is determined, and the opening degree of each ventilation path corresponds to a predetermined opening degree corresponding to the reference opening degree of each opening adjusting means set in advance for each ratio of the ventilation air volume of a plurality of rooms. It is preferable to include opening degree control means for controlling each opening degree adjusting means so as to obtain a target opening degree obtained by multiplying the opening degree correction coefficient of the room.

  Thereby, even if the ventilation load of each room differs, the ventilation air volume of a plurality of rooms is controlled according to the set ratio.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram showing a state in which the ventilator according to the present embodiment is installed, FIG. 2 is a chart showing a setting ratio of ventilation air volumes in a plurality of rooms according to the present embodiment, and FIG. 3 shows control of the ventilator according to the present embodiment. FIG. 4 is a flowchart showing the rotational speed control of the ventilation fan of the present embodiment. FIGS. 5 and 6 show the correlation between the power value and the rotational speed when ventilating a plurality of rooms at a certain set ratio. FIG. 7 is a chart showing the correction amount when ventilating at a certain set ratio as table data.

  As shown in FIG. 1, the ventilator 1 according to the present embodiment includes a plurality of rooms, for example, a bathroom 4a, a dressing room 4b, and a toilet 4c, through separate ventilation paths 5a, 5b, and 5c respectively including ducts and the like. A common casing 2 in communication is provided, and a ventilation fan 3 driven by a DC motor 3a is housed in the casing 2, and the bathroom 4a, the dressing room 4b, and the toilet 4c are ventilated.

  Dampers 6 a, 6 b, 6 c are provided at the connection portions of the ventilation paths 5 a, 5 b, 5 c of the casing 2 as opening degree adjusting means for adjusting the opening degree of the ventilation paths 5 a, 5 b, 5 c. The dampers 6a, 6b, and 6c are rotatably provided from 0 ° to 90 ° by a stepping motor (not shown), close the ventilation paths 5a, 5b, and 5c at an opening degree of 0 °, and the ventilation path 5a at an opening degree of 90 °. 5b and 5c are configured to be fully open. Moreover, the ventilation apparatus 1 is provided with a controller 7, and the controller 7 controls the rotational speed of the ventilation fan 3, and the opening degree of each damper 6a, 6b, 6c.

  A remote controller 8 serving as setting means is connected to the controller 7. The remote controller 8 is configured so that four modes I to IV shown in FIG. 2 can be selected as the ventilation mode.

The mode I is a so-called strong ventilation mode, the total ventilation air volume is set to 150 m ³ / h, and the ratio of the ventilation air volume between the bathroom 4a, the dressing room 4b, and the toilet 4c is 3 to 1: 1. The reference openings of the dampers 6a, 6b and 6c are set to 90 ° for the damper 6a for the bathroom 4a and 30 ° for the damper 6b for the dressing room 4b and the damper 6c for the toilet 4c. The mode II is a so-called weak ventilation mode, the total ventilation air volume is set to 80 m ³ / h, and the ratio of the ventilation air volume between the bathroom 4a, the dressing room 4b, and the toilet 4c is 4 to 3 to 3. As described above, the reference openings of the dampers 6a, 6b, and 6c are set to 32 ° for the bathroom 6a damper 6a, and 24 ° for the dressing chamber 4b damper 6b and the toilet 4c damper 6c.

The mode III is a so-called 24-hour ventilation mode, the total ventilation air volume is set to 100 m ³ / h, and the ratio of the ventilation air volume between the bathroom 4a, the dressing room 4b, and the toilet 4c is 2 to 1: 1. As described above, the damper 6a, 6b, 6c has a reference opening set to 50 ° for the bathroom 6a damper 6a and 25 ° for the dressing chamber 4b damper 6b and the toilet 4c damper 6c. The IV mode is a mode in which the bathroom 4a is heated for 24 hours, and the total ventilation air volume is set to 40 m ³ / h. The reference opening of the dampers 6a, 6b, 6c is set to 0 ° for the damper 6a for the bathroom 4a, and 20 ° for the damper 6b for the dressing room 4b and the damper 6c for the toilet 4c so that the ratio is 0 to 1: 1. Has been. The reference opening degree of each mode is stored and held in a reference opening degree storage means described later.

  Next, the configuration of the controller 7 will be described with reference to FIG.

  In order to control the rotation speed of the ventilation fan 3, the controller 7 calculates a reference rotation speed calculation means 91, a target rotation speed calculation means 92, a constant current circuit 93, a fan control means 95, a motor power detection means 96, a reference current value calculation. Means 97, reference current value storage means 98, and correction amount calculation means 99 are provided. The controller 7 further includes a reference opening degree storage means 101, a reference opening degree determination means 102, an opening degree control means 103, a stepping motor drive circuit 104, and a correction coefficient storage means 105 in order to control the dampers 6a, 6b, 6c. Prepare.

  With reference to FIG. 3 and FIG. 4, the rotational speed control of the ventilation fan 3 by the controller 7 will be described. The ventilation apparatus 1 of this embodiment performs the flowchart shown in FIG. 4 with a predetermined cycle time.

  First, in STEP 1, the total ventilation air volume corresponding to the ventilation mode selected by the remote controller 8 is set. In STEP 2, the reference rotational speed calculation means 91 obtains the reference rotational speed of the ventilation fan necessary for obtaining the total ventilation air volume set in STEP 1. The correlation between the total ventilation air volume and the reference rotation speed is stored in advance.

  In STEP 3, the target rotational speed is calculated by multiplying the reference rotational speed obtained by the reference rotational speed calculating means 91 by the target rotational speed calculating means 92 by the correction amount that is 1.0 when the ventilation device 1 is installed. Desired.

  Next, in STEP 4, the fan control means 95 commands the current value corresponding to the target rotational speed to the constant current circuit, and the constant current circuit controls the current value of the DC motor 3a to the command current value.

  In STEP 5, the rotational speed of the ventilation fan 3 is detected by the rotational speed detecting means 3b including an encoder attached to the DC motor 3a.

  In STEP 6, the fan control means 95 determines whether or not the rotation speed detected by the rotation speed detection means 3 b matches the target rotation speed obtained by the target rotation speed calculation means 92. If they do not match, the fan control means 95 corrects the current command value for the constant current circuit 93 in STEP 7 and performs feedback control to control the rotation speed of the ventilation fan 3 so as to match the target rotation speed.

  If the rotational speed detected by the rotational speed detection means 3b matches the target rotational speed obtained by the target rotational speed calculation means 92, the process proceeds to STEP8, and the motor power detection means 96 causes the actual speed in this embodiment to be realized. The actual current value (actual current value) of the DC motor 3a as the power value is detected.

  Next, in STEP 9, the reference current value calculation means 97 sets the reference current value in the correlation between the rotation speed of the ventilation fan 3 and the reference current value, which will be described later, stored in the reference current value storage means 98. Based on the correlation corresponding to the selected mode, a reference current value corresponding to the rotational speed detected by the rotational speed detection means 3b in STEP 5 is obtained.

  Here, the correlation between the rotation speed and the reference current value will be described.

The solid line a in FIG. 5 shows the correlation between the rotational speed of the ventilation fan 3 corresponding to the mode I and the reference current value. The reference current value is a current value of the DC motor 3a when the ventilation load is a reference load (for example, the internal pressure of the exhaust passage on the outlet side of the ventilation fan 3 is atmospheric pressure). When the ventilation load increases due to the influence of clogging of dust in the exhaust passage and the actual ventilation air volume decreases, the current value of the DC motor 3a decreases from the reference current value as shown by the dotted line b in FIG. . In this case, from the adjustment value, the reference current value, and the actual current value indicated by the one-dot chain line c in FIG.
Correction amount = (reference current value−adjustment value) / (actual current value−adjustment value) (1)
If the rotation speed of the ventilation fan 3 is increased to the rotation speed obtained by multiplying the reference rotation speed by this correction amount (target rotation speed), the air flow when the ventilation airflow is the reference rotation speed in the reference load state Return to. The adjustment value is an experimentally obtained value.

  By the way, if the setting ratio of the ventilation air volume of the plurality of rooms 4a, 4b, and 4c is changed by changing the mode, the suction of the ventilation fan 3 is caused by the difference in the size and the degree of sealing of the rooms 4a, 4b, and 4c. Ventilation load on the side changes. The solid line a in FIG. 6 shows the correlation between the rotational speed of the ventilation fan 3 corresponding to the III mode and the reference current value. In the mode III, even if the ventilation load on the outlet side of the ventilation fan 3 is the same, the ventilation load on the suction side increases from the mode I, so the reference current value is smaller than the mode I. For this reason, when the mode III is selected, if the reference current value indicated by the solid line a in FIG. 5 is used, the correction amount is determined to be greatly deviated. Even if the reference rotation number is multiplied by the correction amount, It is not possible to obtain a target rotational speed that can obtain an appropriate ventilation air volume. Therefore, in this embodiment, for each mode, the correlation between the rotation speed and the reference current value as shown in FIGS. 5 and 6 and the correlation between the adjustment value and the rotation speed are obtained, and these correlations in each mode are obtained. The relationship is stored and held in the reference current value storage unit 98. These correlations may be stored and held in the form of calculation formulas or stored in the form of table data. Since the correlation between the ventilation air volume and the reference rotation speed also changes for each mode, the reference rotation speed corresponding to the total ventilation air volume is obtained based on the correlation corresponding to the selected mode.

  As described above, in STEP 9, the reference current value and the adjustment value corresponding to the current rotation speed of the ventilation fan 3 are obtained based on the correlation between the rotation speed corresponding to the selected mode, the reference rotation speed, and the adjustment value. Next, in STEP 10, the correction amount calculation means 99 substitutes the actual current value of the DC motor 3a detected in STEP 8 and the reference current value and adjustment value obtained in STEP 9 into the above equation (1), thereby calculating the correction amount. calculate.

  Then, in STEP 3, the target rotational speed is obtained by multiplying the reference rotational speed by the correction amount obtained in STEP 10, and the rotational speed of the ventilation fan 3 is controlled so as to coincide with the target rotational speed. Thereby, the ventilation air volume returns to the set air volume.

  In the present embodiment, the correction amount is obtained by equation (1). For example, the difference between the actual current value and the reference current value is stored using table data stored and held in advance as shown in FIG. Thus, the correction amount may be obtained. In this case, FIG. 7 shows only the correction amount of the mode I, but the table data is similarly stored and held in the modes II to IV. In the present embodiment, the motor power detection means 96 (ammeter) is used to detect the actual current value of the DC motor 3a as the actual power value, but the motor power detection means 96 is not provided. The correction amount may be obtained using the command current value to the constant current circuit 93 by the fan control means 95 as an actual current value.

  Next, with reference to FIG. 3, control of the opening degree of each damper 6a, 6b, 6c by the controller 7 will be described.

  First, when the ventilation device 1 is installed, the opening degree of the damper of the room to be ventilated is set to 90 °, the opening degree of the damper of the other room is set to 0 °, and the ventilation fan 3 is operated at a constant rotation speed, for example, 1200 rpm. The current value during ventilation of each room 4a, 4b, 4c is measured. Assume that the measured current values during ventilation of the rooms 4a, 4b, and 4c are, for example, 80 mA when the bathroom 4a is ventilated, 70 mA when the dressing room 4b is ventilated, and 60 mA when the toilet 4c is ventilated.

  The measured correlation between the current values during ventilation of the three rooms 4a, 4b, and 4c corresponds to the difference in ventilation load between the rooms 4a, 4b, and 4c. That is, the smaller the ventilation load, the larger the ventilation air volume and the motor current value. When the opening degree of each damper 6a, 6b, 6c is set to the reference opening degree corresponding to the ventilation mode, the ventilation air volume in a room with a small ventilation load increases, the ventilation air volume in a room with a large ventilation load decreases, and a plurality of The air volume ratios of the rooms 4a, 4b, 4c are deviated from the set ratio. Therefore, the opening correction coefficient of the plurality of rooms 4a, 4b, 4c is calculated by dividing the predetermined set power value by the measured current value during ventilation of each room 4a, 4b, 4c. And the target opening degree of each damper 6a, 6b, 6c is calculated by multiplying each opening degree correction coefficient by the reference opening degree of damper 6a, 6b, 6c of each room 4a, 4b, 4c. And the opening degree of each damper 6a, 6b, 6c is controlled so that it may correspond to this target opening degree. Thereby, the ratio of the ventilation air volume of the plurality of rooms 4a, 4b, 4c comes to coincide with the set ratio.

  In the present embodiment, the predetermined set power value is the highest value of 80 mA among the current values during ventilation of the rooms 4a, 4b, and 4c. Therefore, the opening degree correction coefficient of the damper 6a for the bathroom 4a is 80/80. Similarly, the opening correction coefficient of the damper 6b for the dressing room 4b is 80/70, and the opening correction coefficient of the damper 6c for the toilet 4c is 80/60. Each opening correction coefficient obtained in this way is stored in the correction coefficient storage means 105.

  The reference opening determination means 102 searches for the reference opening corresponding to the mode selected by the remote controller 8 based on the table data stored in the reference opening storage means 101. Next, the opening control means 103 multiplies each damper 6a, 6b, 6c by the reference opening corresponding to the selected mode by multiplying the opening correction coefficient of each damper 6a, 6b, 6c stored in the correction coefficient storage means 105. The target openings of 6b and 6c are calculated, and the openings of the dampers 6a, 6b and 6c are controlled via the stepping motor drive circuit 104 so as to coincide with the target openings. As a specific example, when the mode of the setting ratio I is selected by the remote controller 8, the opening degree of the damper 6a for the bathroom 4a is 90 ° × (80/80) = 90 °. Similarly, the damper 6b for the dressing room 4b is 34 ° and the damper 6c for the toilet 4c is 40 °.

  The predetermined set power value for obtaining the opening correction coefficient may be, for example, an average value of current values during ventilation of the rooms 4a, 4b, and 4c, but each room 4a as in the present embodiment. By setting the highest value among the current values during ventilation of 4b and 4c as a predetermined set power value, the opening degree of the dampers 6a, 6b, and 6c can be adjusted to be opened. Thereby, the opening area of the ventilation path 5a, 5b, 5c becomes large, As a result, the rotation speed of the ventilation fan 3 can be lowered | hung and it is advantageous to noise prevention.

  According to the ventilator 1 of the present embodiment, the correction amount is calculated based on the reference current value stored in advance and the actual current value of the motor 3a. The required set air volume can be obtained. In addition, since the reference current value is stored and held in advance for each of the four modes I to IV and the reference current value is changed every time the mode is changed, the correction is made based on the reference current value corresponding to the selected mode. The amount can be calculated correctly and ventilation can be performed with the required set air volume. Even if the ventilation loads of the rooms 4a, 4b, and 4c are different, the openings of the dampers 6a, 6b, and 6c are controlled according to the ventilation load. The ratio is controlled according to the set ratio.

  In addition, although the ventilation apparatus 1 of this embodiment is controlled by the electric current value, you may make it control by the voltage value. In this case, in this embodiment, the correlation between all the current values stored in advance and the rotation speed is the correlation between the voltage value and the rotation speed. Further, the motor power detection means 96 detects the voltage value of the DC motor 3a.

  In the present embodiment, the total ventilation air volume and the ratio of the ventilation air volumes of the plurality of rooms 4a, 4b, and 4c are set and changed by switching the ventilation mode, but the total ventilation air volume and the plurality of ventilation air flow ratios are changed. The present invention can be similarly applied to the case where the ratios of the ventilation airflow rates of the rooms 4a, 4b, and 4c are individually changed.

  In the present embodiment, all the openings of the ventilation paths 5a, 5b, and 5c can be adjusted by the dampers 6a, 6b, and 6c, respectively, but the present invention is a part of the plurality of ventilation paths. It is also applicable to those in which the opening of the ventilation path is not adjusted by opening adjusting means such as a damper. For example, if there is a room that is set to always ventilate (the ventilation is not stopped), the opening degree of the ventilation path connected to the room is not adjusted by the opening degree adjusting means such as a damper. May be. This is because the ratio of the ventilation air volume in a plurality of rooms can be set by adjusting the opening degree of the ventilation path connected to the other room by an opening degree adjusting means such as a damper. In this case, in order to calculate the opening correction coefficient, the predetermined set power value divided by the measured current value during ventilation of each room is connected to the ventilation path that does not adjust the opening by the opening adjusting means. The power value when the room is ventilated.

  This will be described more specifically in accordance with the above embodiment. For example, even if the damper 6c for the toilet 4c is omitted, the damper 6a for the bathroom 4a and the damper 6b for the undressing room 4b are used for the bathroom and undressing. By adjusting the opening degree of each ventilation path 5a, 5b for the room, the ratio of the ventilation air volume of the bathroom 4a, the dressing room 4b, and the toilet 4c can be changed. In addition, the opening degree of the ventilation path 5c for the toilet 4c is the same as that for the bathroom 4a and the dressing room so that the ratio of the ventilation air volume between the bathroom 4a, the dressing room 4b, and the toilet 4c can be set to 3: 1 on the I mode. It is set to about 1/3 of the opening when the dampers 6a and 6b for 4b are fully opened.

  And the opening degree of the damper 6a for the bathroom 4a is adjusted to 1/3 of the fully open state corresponding to the opening degree of the ventilation path 5c for the toilet 4c (the damper 6b for the dressing room 4b is fully closed, the ventilation for the toilet 4c The bathroom 4a is ventilated when the path 5c is closed), and the opening degree of the damper 6b for the dressing room 4b is adjusted to 1/3 of the fully opened state (the bathroom damper 6a is fully closed, the ventilation path for the toilet 4c) 5c is closed), and the dressing room 4b is ventilated. Further, both the dampers 6a and 6b for the bathroom 4a and the dressing room 4b are fully closed to ventilate the toilet 4c. When the measured current value during ventilation of each of the rooms 4a, 4b, and 4c is, for example, 30 mA when the bathroom 4a is ventilated, 27 mA when the dressing room 4b is ventilated, and 25 mA when the toilet 4c is ventilated, the bathroom 4a The opening correction coefficient of the damper 6a is 25/30, and the opening correction coefficient of the damper 6b for the dressing room 4b is 25/27.

  Moreover, in the said embodiment, although damper 6a, 6b, 6c which can be rotated by the stepping motor which is not illustrated is used as an opening degree adjustment means, the opening degree adjustment means of this invention is not restricted to this, Other things may be used as long as the opening degree of the ventilation path can be adjusted.

The schematic diagram which shows the state which installed the ventilation apparatus of this embodiment. The graph which shows the setting ratio of the ventilation air volume of the some room of this embodiment. The block diagram which showed control of the ventilation apparatus of this embodiment. The flowchart which shows the rotation speed control of the ventilation fan of this embodiment. The graph which shows the correlation with the electric power value at the time of ventilating several rooms by a certain ratio, and rotation speed. The graph which shows the correlation with the electric power value at the time of ventilating several rooms by a certain ratio, and rotation speed. The chart which expressed the correction amount at the time of ventilating with a certain setting ratio with the table data.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Ventilation device, 3 ... Ventilation fan, 6a-6c ... Damper, 91 ... Reference | standard rotation speed calculation means, 92 ... Target rotation speed calculation means, 95 ... Fan control means, 97 ... Reference current value calculation means, 98 ... Correction amount Calculation means, 103 ... opening degree control means.

Claims (2)

A ventilator that ventilates multiple rooms with a single ventilation fan,
Setting means for setting the total ventilation air volume of a plurality of rooms and the ratio of the ventilation air volume of the plurality of rooms;
The degree of opening of the ventilation path that communicates one or more predetermined rooms of the plurality of rooms with the ventilation fan can be adjusted according to the ratio of the ventilation air volume of the plurality of rooms set by the setting means. Opening degree adjusting means,
A reference rotational speed calculation means for obtaining a reference rotational speed of the ventilation fan required to obtain the total ventilation air volume set by the setting means;
Ventilation based on the reference power value of the motor required to drive the ventilation fan at the same rotation speed as the current rotation speed when the ventilation load is a predetermined reference load, and the actual power value of the current motor Correction amount calculation means for obtaining a correction amount corresponding to a change in load;
Target rotational speed calculating means for correcting the reference rotational speed according to the correction amount to obtain the target rotational speed of the ventilation fan;
Fan control means for controlling the rotational speed of the ventilation fan so that the rotational speed matches the target rotational speed,
The reference power value of the motor corresponding to each rotation speed of the ventilation fan is stored and retained separately for each setting ratio of the ventilation air flow rate of a plurality of rooms settable by the setting means,
A ventilator characterized by changing the reference power value of a motor corresponding to each rotation speed of a ventilation fan in accordance with a setting change of a ratio of ventilation airflow rates of a plurality of rooms. The actual power value of the motor when each of the predetermined rooms is individually ventilated by rotating the ventilation fan at a predetermined number of revolutions, and the opening correction coefficient for each predetermined room is determined by dividing the predetermined set power value. The opening degree of each ventilation path is obtained by multiplying the reference opening degree of each opening degree adjusting means set in advance for each ratio of the ventilation air volume of a plurality of rooms by the opening correction coefficient of each corresponding predetermined room. The ventilator according to claim 1, further comprising opening degree control means for controlling each opening degree adjusting means so as to obtain a target opening degree.

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