JP2015117879A - Air amount control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To acquire a desired ventilation amount according to an arrangement form even when the arrangement form of a ventilation duct and the like is different.SOLUTION: With respect to a casing 11 of a ventilation unit E in which a ventilation fan is accommodated, an air intake duct and an exhaust duct for configuring a ventilation passage can be connected in a plurality of arrangement forms. In accordance with each of the plurality of the arrangement forms, setting information showing the relationship of rotational speed of a fan motor for driving the ventilation fan and an electrical input value is stored in storage means in advance according to a ventilation amount. Control means determines which arrangement form is selected out of the plurality of arrangement forms, and controls the rotational speed of the fan motor based on the setting information corresponding to the determined arrangement form.

Description

  The present invention relates to an air flow control device for controlling a ventilation air flow and the like.

  As this type of air volume control device, for example, in Patent Document 1, a voltage applied to a fan motor that drives a ventilation fan that ventilates a bathroom, a dressing room, or the like is calculated in advance with the target rotation speed of the fan motor determined in advance. There is described a bathroom heating ventilator that controls the ventilation air volume to a set air volume by controlling based on the relationship with the voltage applied to the fan motor.

JP 2013-181683 A

  In the bathroom heating and ventilating apparatus that ventilates multiple rooms such as a bathroom, a dressing room, and a toilet as in Patent Document 1, the casing of the ventilation unit in which the ventilation fan is housed has a ventilation target room and an outdoor outlet. A plurality of connection ports are provided so that the intake duct communicating with the ventilation target room and the exhaust duct communicating with the outdoor discharge port can be arranged and connected in accordance with the arrangement and the like.

  That is, it is possible to connect the intake duct and the exhaust duct to a plurality of connection ports of the casing of the ventilation unit in a plurality of different arrangement forms, and when installing a bathroom heating ventilator According to the arrangement of the room to be ventilated, etc., any one of a plurality of arrangement forms is selected, and both the ducts are connected to the connection ports of the casing, and the unused connection ports are closed. It is configured.

  As described above, ventilation ducts such as an intake duct and an exhaust duct are connected to a casing in which a ventilation fan is housed in different arrangement forms depending on the arrangement of a ventilation target room in which a bathroom heating ventilator is installed. There is a case.

  In general, an air flow control device such as a bathroom heating ventilator has a ventilation flow by the air flow control device depending on the arrangement form of the ventilation duct, even if the fan used therein and the fan motor attached to the fan are the same. The characteristic of the differential pressure P between the static pressure at the exhaust position of the air flow control device and the static pressure at the intake position with respect to the quantity Q, that is, the so-called PQ characteristic is different.

  Therefore, in the conventional air volume control device, when a plurality of arrangement forms are possible as the arrangement form of the ventilation duct in the ventilation unit, depending on the arrangement form to be selected, the target rotational speed of the fan motor determined in advance as described above And the voltage applied to the fan motor may deviate, and the ventilation air volume may deviate from the desired set air volume.

  The present invention has been made paying attention to such a situation, and an object of the present invention is to obtain a desired ventilation air volume according to the arrangement form even if the arrangement form of the ventilation duct or the like is different. To do.

(1) In the air volume control device of the present invention, each of the intake and exhaust ventilation paths can be connected in a plurality of different arrangement forms to a plurality of connection ports of the fan casing in which a ventilation fan is housed. There is an air volume control device comprising: a fan motor that drives the fan; and a control unit that controls the rotational speed of the fan motor according to an electrical input value to the fan motor,
Setting information indicating the relationship between the rotational speed of the fan motor and the electrical input value corresponding to each of the plurality of arrangement forms is provided with storage means that is stored in advance according to the amount of ventilation,
The control means determines which of the plurality of arrangement forms the connection of each ventilation path to the fan casing is, and the setting of the storage means corresponding to the determined arrangement form Based on the information, the rotational speed of the fan motor is controlled.

  According to the present invention, the rotational speed of the fan motor and the electric input value are respectively corresponding to the plurality of arrangement forms when the intake passages and the exhaust passages are connected to the plurality of connection ports of the fan casing. The setting information indicating the relationship is stored in advance in the storage unit according to the ventilation amount, and the control unit determines which of the plurality of arrangement forms is selected, and corresponds to the determined arrangement form Since the rotation speed of the fan motor is controlled based on the setting information, it is possible to prevent the air volume from deviating from the desired air volume, regardless of the arrangement form selected from the plurality of arrangement forms. Ventilation is performed.

  (2) In a preferred embodiment of the present invention, the control means is the connection in any of the arrangement forms in the test operation mode before the connection of the ventilation paths to the plurality of connection ports of the fan casing is completed. In the normal operation mode after the connection of the ventilation paths is completed, the rotational speed of the fan motor is controlled based on the setting information of the storage means corresponding to the determined arrangement form.

  According to this embodiment, the trial operation mode for determining which of the plurality of arrangement forms is used for connection is a state suitable for determination before the connection of the air passage to the fan casing is completed, for example, the fan casing Since only the duct joint is connected to the connection port and the intake duct and exhaust duct are not connected, that is, the ventilation resistance for each arrangement form can be executed in a substantially constant state, the arrangement form can be determined accurately. can do.

  (3) In another embodiment of the present invention, there is provided detection means for detecting the presence / absence of connection of the air passages to the plurality of connection ports of the fan casing, and the control means outputs a detection output of the detection means. Based on this, it is determined which of the plurality of arrangement forms the connection of each ventilation path to the fan casing is a connection of.

  The detection means preferably includes a mechanical or optical sensor such as a micro switch or a photo interrupter.

  According to this embodiment, since the detection means detects the presence or absence of connection of each ventilation path to the plurality of connection ports of the fan casing, the control means can determine the arrangement form based on the detection output, There is no need to run the test run mode.

  (4) In still another embodiment of the present invention, the electrical input value to the fan motor is an applied voltage to the fan motor.

  According to this embodiment, since the electrical input value to the fan motor is the voltage applied to the fan motor, the configuration of the control means for controlling the fan motor is simplified.

  (5) In another embodiment of the present invention, the electrical input value to the fan motor is the applied power to the fan motor.

  According to this embodiment, by setting the electric power applied to the fan motor having a close correlation with the air volume as an electrical input value to the fan motor, the air volume is desired due to variations in the motor characteristics of the fan motor. Deviation from the air volume is suppressed.

  According to the present invention, the relationship between the rotational speed of the fan motor and the electrical input value is shown corresponding to each of a plurality of arrangement forms when the intake and exhaust ventilation paths are connected to the fan casing. Setting information is stored in advance according to the ventilation amount, and it is determined which of the plurality of arrangement forms is selected, and the rotation of the fan motor is performed based on the setting information corresponding to the determined arrangement form Since the speed is controlled, even if any of the plurality of arrangement forms is selected, the air volume is prevented from deviating from the desired air volume, and ventilation is performed with an appropriate air volume.

It is a schematic plan view of the bathroom heating ventilation apparatus as an air volume control apparatus of one Embodiment of this invention. It is a schematic side view of the bathroom heating ventilator of FIG. It is a front view of a remote control. It is a figure which shows the arrangement | positioning form of the connection of the intake joint and exhaust joint with respect to the casing for ventilation fans. It is a figure which shows the relationship between the PQ characteristic of a fan motor, and the load characteristic of a ventilation path. It is a figure which shows the relationship between the rotational speed of a fan motor, and an applied voltage. It is a figure which shows the relationship between the rotational speed of a fan motor in the case of a different arrangement | positioning form, and an applied voltage.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this embodiment, description will be made by applying the present invention to a bathroom heating ventilator as an air volume control device.

  FIG. 1 is a schematic plan view of a bathroom heating / ventilation apparatus as an air volume control device according to an embodiment of the present invention, and FIG. 2 is a schematic side view of the bathroom heating / ventilation apparatus.

  This bathroom heating and ventilating apparatus includes a bathroom unit B that is installed on the ceiling of the bathroom A and performs drying and ventilation of the bathroom A, and a ventilation fan 12 that ventilates the bathroom A, the toilet C, and the dressing room D. A control unit H provided in the ventilation unit E and the bathroom unit B and corresponding to a control means for controlling the operation of the bathroom unit B and the ventilation unit E, a remote controller R for instructing the control unit H to operate and the like It is composed of

  The bathroom unit B has an opening on the lower side, a casing 1 provided with an exhaust connection port 2 for exhausting ventilation air on one side, a suction part 3 and an outlet part 4 and is arranged so as to close the lower side of the casing 1 The grill plate 5 is provided.

  In the casing 1, a circulation path 6 that connects the suction part 3 and the blowout part 4 is defined and formed in the middle of the path of the circulation path 6 from the suction part 3 to the blowout part 4. An exhaust connection port 2 is formed so as to communicate with each other, and an opening / closing body 20 that opens and closes the exhaust connection port 2 is provided.

  The opening / closing body 20 is configured to be opened and closed by switching the electromagnet 20b between an energized state and a non-energized state to open and close the shutter body 20a.

  Further, in the circulation path 6, the air that acts on the suction portion 3 and the ventilation fan 7 that ventilates the suction air to be sent to the blowout portion 4 and the exhaust connection port 2, and the air that flows through the circulation path 6 is heated. A heat exchanger 8 is provided.

  The heat exchanger 8 is connected to a hot water circulation path 9 that circulates and supplies hot water from an external heat source machine (not shown), and heat that intermittently supplies hot water to the heat exchanger 8 is connected to the hot water circulation path 9. A valve 10 is provided.

  The ventilation unit E is configured by housing a ventilation fan 12 as a ventilation fan in a ventilation fan casing 11, and in this example, one side surface of the ventilation fan casing 11 is for two other rooms. The other side surface is an exhaust port 14. In addition, although the other side has a connection port that can be used as an intake port, it is not used in this example, and is thus closed by the closing plate 27.

  The exhaust fan 12 is connected to the exhaust port 14 so that the ventilation fan 12 causes the intake fan casing 11 to act as an intake air by driving the fan motor 12a and exhausts the intake air from the exhaust port 14. Like to do.

  Each of the intake ports 13 for the other rooms is provided with a damper 15 that adjusts the opening amount of the intake port 13 for the other rooms so as to be movable up and down, and through a cylindrical intake joint 16 that is a duct connecting portion. The intake duct 17 that forms a ventilation path communicating with each of the toilet C and the dressing room D is connected, and the intake port 13 is a connection port that connects the intake duct 17.

  The exhaust port 14 is configured to be connected to an exhaust duct 19 that forms a ventilation path extending outdoors through a cylindrical exhaust joint 18 that is a duct connection portion. This is a connection port for connecting the exhaust duct 19.

  In this way, the fan motor 12 a is driven to ventilate the ventilation fan 12, and the air in the bathroom A is sucked into the ventilation fan casing 11 through the bathroom unit B and ventilated through the exhaust duct 19. In addition, the air in the toilet C and the dressing room D is sucked into the ventilation fan casing 11 through the intake duct 17 and ventilated through the exhaust duct 19.

  The control unit H controls the opening and closing of the opening / closing body 20 based on a command from the remote controller R, and controls the ventilation operation of the circulation fan 7 and the ventilation fan 12 to dry the interior of the bathroom A. Cool air operation that circulates the air in A, heating operation that heats the inside of bathroom A, normal ventilation operation that ventilates the inside of bathroom A and toilet C and dressing room D with the normal set ventilation, bathroom A and toilet C and Various operations such as a 24-hour ventilation operation in which the inside of the dressing room D is ventilated at a set ventilation amount for 24 hours are performed.

  As shown in FIG. 3, the remote control R has a drying operation switch 21 for instructing a drying operation, a cool air operation switch 22 for instructing a cool air operation, a heating operation switch 23 instructing a heating operation, and a normal ventilation instructing a normal ventilation operation. An operation switch 24, a 24-hour ventilation operation switch 25 for instructing a 24-hour ventilation operation, a display unit 26, and the like are provided.

  In the drying operation, the circulating fan 7 is operated, and the hot water is circulated to the heat exchanger 8 by controlling the opening and closing of the thermal valve 10 so that the temperature in the bathroom A is maintained within the set temperature range for drying. While supplying the opening / closing body 20, the ventilation fan 12 is operated so as to obtain a set air volume, and a part of the air sucked from the bathroom A is supplied to the ventilation fan through the exhaust connection port 2. The circulating air heated by the heat exchanger 8 is blown out into the bathroom A from the blowing section 4 while being sucked into the casing 11 and discharged to the outside through the exhaust duct 19.

  In the cool air operation, the circulation fan 7 is operated and the opening / closing body 20 is opened, and the ventilation fan 12 is operated so as to obtain the set air volume, and a part of the air sucked from the bathroom A is exhausted. The circulating air sucked from the suction portion 3 is blown out into the bathroom A from the blow-out portion 4 while being sucked into the ventilation fan casing 11 through the connection port 2 and discharged to the outside through the exhaust duct 19. .

  In the heating operation, the circulation fan 7 is operated, and the hot water is circulated to the heat exchanger 8 by controlling the opening and closing of the thermal valve 10 so that the temperature in the bathroom A is maintained within the set temperature range for heating. In addition to being supplied, the opening / closing body 20 is closed to heat the entire amount of air sucked from inside the bathroom A by the heat exchanger 8, and the heated circulating air is blown into the bathroom A from the blowing section 4. ing.

  In the normal ventilation operation, with the opening / closing body 20 opened, the ventilation fan 12 is operated so as to obtain a normal set ventilation amount, and the toilet C and the dressing room D are drawn through the air sucked from the bathroom A and the intake duct 17. The air sucked from the inside is sucked into the ventilation fan casing 11 and ventilated through the exhaust duct 19, so that the bathroom A, the toilet C, and the dressing room D are simultaneously ventilated.

  Incidentally, when it is not desired to ventilate the bathroom A, such as during the heating operation described above, the remote controller R commands the remote controller R to operate the ventilation fan 12 with the opening / closing body 20 closed, and the toilet C and undressing Only room D is ventilated.

  In the 24-hour ventilation operation, the ventilation fan 12 is operated so that the ventilation amount is set to 24 hours, and the air sucked from the bathroom A and the air sucked from the toilet C and the dressing room D through the intake duct 17 are used for the ventilation fan. The air is sucked into the casing 11 and ventilated through the exhaust duct 19, and the bathroom A, the toilet C, and the dressing room D are ventilated simultaneously for 24 hours.

  Incidentally, when it is not desired to ventilate the bathroom A, such as during the heating operation described above, the remote controller R commands the remote controller R to operate the ventilation fan 12 with the opening / closing body 20 closed, and the toilet C and undressing Only room D is ventilated.

  As described above, the bathroom heating / ventilating apparatus of this embodiment can ventilate the three rooms of the bathroom A, the toilet C, and the undressing room D, and the arrangement of the rooms to be ventilated and the outdoor exhaust. According to the arrangement of the outlet, etc., the arrangement form of the intake duct 17 and the exhaust duct 19 with respect to the intake opening 13 and the exhaust opening 14 which are the connection ports of the ventilation fan casing 11 of the ventilation unit E is selected from a plurality of different arrangement forms. Can be connected.

  FIG. 4 exemplifies the plurality of arrangement forms, and is a view showing the duct connecting portions 16 and 18 of the bathroom unit B and the ventilation unit E.

  The arrangement form corresponding to FIG. 1 is FIG. 4 (d), and the intake joints 16 are respectively connected to two intake ports on one side (right side) of the ventilation fan casing 11 of the ventilation unit E. An exhaust joint 18 is connected to the exhaust port on the other side surface (left side surface). The arrangement form of FIG. 4 (c) is an arrangement obtained by inverting the right and left of the arrangement form of FIG. 4 (d), that is, the ventilation unit E mounted on the bathroom unit B while being reversed left and right.

  The arrangement shown in FIG. 4 (b) is the same as the arrangement shown in FIG. 4 (c), except that one intake joint 16 connected to the other side face (left side face) is connected to the one side face where the exhaust joint 18 is connected. It is connected to the (right side surface) and is adjacent to the exhaust joint 18. Although not shown, there is an arrangement in which the left and right sides of the arrangement in FIG. 4B are reversed.

  The arrangement shown in FIG. 4A is the same as the arrangement shown in FIG. 4C except that the other intake joint 16 connected to the other side surface (left side surface) is connected to the one side surface to which the exhaust joint 18 is connected. It is connected to the (right side surface) and is adjacent to the exhaust joint 18. Although not shown, there is also an arrangement form in which the right and left sides of the arrangement form of FIG.

  That is, in this embodiment, six arrangement forms are possible, and any arrangement form is selected according to the arrangement of the ventilation target room in which the bathroom heating / ventilation apparatus is installed, the arrangement of the outdoor outlet, and the like.

  In addition, the unused inlet of the ventilation fan casing 11 of the ventilation unit E is closed by the closing plate or the like as described above.

  Next, control of the ventilation fan 12 by the control unit H in this bathroom heating / ventilation apparatus will be described.

  The fan motor 12a attached to the ventilation fan 12 and the control unit H are connected via a connector (not shown) and an electric wire (not shown), and the control unit H passes through the electric wire and information on the rotational speed of the fan motor 12a. And a voltage is applied to the fan motor 12a.

  And the control part H is set to the setting information which shows the relationship between the target rotational speed of the fan motor 12a and the applied voltage (electrical input value) to the fan motor 12a previously memorize | stored in the memory | storage part of this control part H. Based on this, the voltage applied to the fan motor 12a is controlled so as to achieve the target rotational speed of the fan motor 12a corresponding to the normally set ventilation volume and the set air volume such as the 24-hour set ventilation volume. .

  Here, the setting relationship between the target rotational speed of the fan motor 12a and the applied voltage to the fan motor 12a for the control unit H to control the applied voltage to the fan motor 12a will be described.

  For example, assume that the set air volume is Q1 (for example, 100 m <3> / h).

  FIG. 5 shows the ventilation of the bathroom heating ventilator when the voltages applied to the fan motor 12a mounted on the ventilation fan 12 are V1, V2, V3, V4, V5 (V1 <V2 <V3 <V4 <V5). PQ characteristics (characteristics indicated by V1 to V5) indicating the characteristics of the differential pressure P between the static pressure in the exhaust section and the static pressure in the intake section with respect to the ventilation volume Q ventilated by the fan 12, and ventilation by the ventilation fan 12 PQ characteristics indicating the relationship between the pressure loss P and the ventilation amount Q in the ventilation path when the ventilation resistance of the ventilation path is L1, L2, L3, L4, L5 (ventilation resistance L1 <L2 <L3 <L4 <L5) (Upward curve shown by L1 to L5).

In FIG. 5, the broken line represents a line where the air volume is constant at Q1 (for example, 100 m ³ / h), and even if the ventilation resistance of the ventilation path is different, the fan motor depends on the ventilation resistance of the ventilation path. By adjusting the voltage applied to 12a, as shown below, it is possible to match the ventilation rate of the ventilation fan 12 with Q1.

  (1) When the ventilation resistance of the ventilation path is L1, at the intersection of the curve of the PQ characteristic of the ventilation path and the broken line when the ventilation resistance of the ventilation path is L1, that is, at the point surrounded by the circle of numeral 1 If the curve of the PQ characteristic of the ventilation path when the ventilation resistance of L1 intersects with the curve of the PQ characteristic of the ventilation fan 12, the ventilation resistance is passed through the ventilation path of L1 with the ventilation amount of Q1. From the above, by adjusting the voltage applied to the fan motor 12a to V1, the air flow rate becomes Q1.

  (2) Similarly, the voltage applied to the fan motor 12a is adjusted to V2 when the ventilation resistance of the air path is L2, and the voltage applied to the fan motor 12a is V3 when the ventilation resistance of the air path is L3. When the airflow resistance of the air passage is L4, the voltage applied to the fan motor 12a is adjusted to V4. When the airflow resistance of the air passage is L5, the voltage applied to the fan motor 12a is adjusted. Ventilation amount becomes Q1 by adjusting to V5.

  On the other hand, the rotational speed N1 of the fan motor 12a when the voltage applied to the fan motor 12a is V1 and the air flow rate of Q1 is a value unique to the ventilation fan 12, and similarly, the fan motor 12a When the applied voltage is V2, the rotation speed N2 of the fan motor 12a when the ventilation is Q1 and when the voltage to be applied is V3, the ventilation is Q1. In this case, the rotation speed N3 of the fan motor 12a and the rotation speed N4 of the fan motor 12a when the voltage applied to the fan motor 12a is V4 and the air flow rate of Q1 are applied to the fan motor 12a. The rotation speed N5 of the fan motor 12a when the ventilation voltage is V5 and the ventilation amount is Q1 is also unique to the ventilation fan 12, respectively. It is.

  Therefore, when the air flow is Q1, the relationship between the rotational speed N of the fan motor 12a and the voltage V applied to the fan motor 12a is as follows: V = V1 when N = N1, and V = N2 when N = N2. When V = V2 and N = N3, V = V3, when N = N4, V = V4, and when N = N5, V = V5 is established.

  In other words, V = V1 when N = N1, V = V2 when N = N2, V = V3 when N = N3, V = V4 when N = N4, and V = V5 when N = N5. By adjusting the voltage V applied to the fan motor 12a so as to satisfy the relationship, even if the ventilation resistance of the ventilation path is unknown, it is possible to ventilate with the ventilation amount of Q1.

  Here, generally, the ventilation resistance of the ventilation path ventilated by a ventilation device such as a bathroom heating ventilation device is not a discrete value as in the above L1 to L5, but can take various values. However, the relationship between the rotational speed N of the fan motor 12a and the voltage V applied to the fan motor 12a is obtained in advance for each set air volume such as the normal set ventilation volume and the 24-hour set ventilation volume, and the fan motor 12a. If the applied voltage V to the fan motor 12a is controlled so that the relationship between the rotation speed N of the fan and the applied voltage V to the fan motor 12a satisfies this relationship, the amount of ventilation that is ventilated by the bathroom heating ventilator Is adjusted to the set air volume such as the normal set ventilation volume and the 24-hour set ventilation volume.

  In other words, the control unit H described above sets the normal set ventilation volume and the 24-hour set ventilation volume based on the relationship between the target rotation speed of the fan motor 12a and the applied voltage to the fan motor 12a. This means that the voltage applied to the fan motor 12a may be controlled so that the target rotational speed of the fan motor 12a corresponding to the air volume is obtained.

  In the bathroom heating / ventilation apparatus according to the present embodiment, as shown in FIG. 6, in the storage unit of the control unit H, the target rotational speed N of the fan motor 12 a and the applied voltage V to the fan motor 12 a according to the ventilation rate. The setting information indicating the relationship S1 is obtained and stored in advance. 6 is the relationship between the target rotational speed N of the fan motor 12a and the applied voltage V to the fan motor 12a corresponding to the arrangement of the intake joint 16 and the exhaust joint 18 shown in FIG. This corresponds to the air flow rate Q1.

  And the setting information which shows the relationship between the target rotational speed N of the fan motor 12a and the applied voltage V to the fan motor 12a corresponding to each of the plurality of arrangement forms of the intake joint 16 and the exhaust joint 18 of FIG. A plurality of values are obtained in advance according to the amount of ventilation and stored in the storage unit of the control unit H.

  For example, as shown in FIG. 7, corresponding to each arrangement form of FIG. 4A, FIG. 4B, and FIG. 4C, the target rotational speed N of the fan motor 12a according to the air flow rate Q1 is shown. And setting information indicating the relations S2, S3, and S4 with the applied voltage V to the fan motor 12a are stored in advance.

  In this embodiment, the control part H performs the arrangement | positioning form determination mode which determines whether it is connected by which arrangement | positioning form among several arrangement | positioning forms.

  That is, the test run mode is executed by operating a test run start command switch (not shown) provided in the control unit H, and in the test run mode, the arrangement form determination mode is executed and the determination result is stored.

  In the installation instructions for the bathroom heating / ventilation apparatus of the present embodiment, after the intake joint 16 and the exhaust joint 18 are connected to the ventilation fan casing 11 of the ventilation unit E, the intake duct and the exhaust duct are not connected. It is described that the test operation start command switch (not shown) is operated in a state where the connection of the intake and exhaust ventilation paths has not been completed, and the test operation mode is set without connecting the intake duct and the exhaust duct. Is executed, the arrangement form determination mode is executed, and the determination result is stored.

  With the intake duct and the exhaust duct not connected, for example, the arrangement of the intake joint 16 and the exhaust joint 18 depends on the number of rotations of the fan motor 12a when a predetermined voltage is applied to the fan motor 12a. ) To (d), it is determined as follows.

 That is, for example, the settings indicating the relationships S1, S2, S3, and S4 between the target rotational speed N of the fan motor 12a and the applied voltage V to the fan motor 12a respectively corresponding to the plurality of arrangement forms shown in FIGS. Based on the information, in order to correspond to the state where the intake duct and the exhaust duct are not connected, the rotation speed when the applied voltage is in the vicinity of the lowest voltage, for example, the voltage of 10 V is detected, and the rotation speed is The arrangement form is determined based on whether the values are closest to the relationships S1, S2, S3, and S4.

  In this way, the arrangement form is determined, the determination result is stored in the control unit H, and the trial operation mode is automatically terminated.

  As described above, in the trial operation mode, the state of the ducts connected to the intake and exhaust sections is in a state convenient for the arrangement form determination mode, in which the intake duct and exhaust duct are not connected, that is, the ventilation resistance for each arrangement form. Can be determined in a substantially constant state, so that erroneous determination in the arrangement form determination mode is suppressed.

  After the trial operation mode is completed, the intake duct and the exhaust duct 18 are connected to the intake joint 16 and the exhaust joint 18 of the ventilation fan casing 11 of the ventilation unit E to complete the connection of the intake and exhaust ventilation paths. Thereafter, the normal operation mode in which the bathroom heating / ventilation apparatus is operated by the operation of the remote controller R is executed.

  In the normal operation mode, the setting indicating the relationship corresponding to the arrangement form of the intake joint 16 and the exhaust joint 18 from the setting information indicating the plurality of relations S1 to S4 set in advance according to the determination result of the arrangement form determination mode. By selecting one piece of information, the applied voltage V to the fan motor 12a is controlled so that the relationship between the rotational speed N of the fan motor 12a and the applied voltage V to the fan motor 12a satisfies the selected relationship. The ventilation volume that is ventilated by the bathroom heating ventilator is adjusted to a normal setting ventilation volume and a setting ventilation volume such as a 24-hour setting ventilation volume.

[Another embodiment]
In the above embodiment, the trial operation mode is executed to determine the arrangement form. However, as another embodiment of the present invention, any one of the plurality of connection openings such as the intake opening of the ventilation fan casing 11 of the ventilation unit E is provided. Are provided with detecting means for detecting whether the intake joint 16 and the exhaust joint 18 are connected and the left and right mounting directions of the ventilation unit E with respect to the bathroom unit B, and control is performed based on the detection output of the detecting means. The arrangement form may be determined by the part H.

  Specifically, for example, a mechanical contact type or optical sensor such as a micro switch or a photo interrupter is disposed in the vicinity of the connection port of the ventilation fan casing 11, and the intake joint 16 and the exhaust joint 18 include An operating piece, a protrusion, a notch, or the like for operating the sensor may be provided in accordance with the attachment / detachment to the connection port. Moreover, what is necessary is just to provide the said operation piece etc. which arrange | position the said sensor and operate the said sensor according to the mounting direction of a ventilation unit in the part by which the ventilation unit E of the bathroom unit B is mounted | worn.

  By configuring so that the detection output of the sensor is supplied to the control unit H, the control unit H can accurately determine which arrangement form is selected. Further, it is not necessary to execute the test operation mode for determining the arrangement form.

  As still another embodiment of the present invention, an operator who performs installation work of a bathroom heating / ventilating apparatus is configured to be able to set and input a selected arrangement form to the control unit H, and the control unit H The arrangement form may be determined based on the input.

  In the above embodiment, the electrical input value to the fan motor 12a is configured as the applied voltage. However, the electrical input value to the fan motor 12a is configured as the applied power, and the control unit H sets the target of the fan motor 12a. Based on the relationship between the rotational speed and the electric power (electrical input value) applied to the fan motor 12a, the target rotational speed of the fan motor 12a corresponding to the set air volume such as the normal set ventilation volume and the 24-hour set ventilation volume is obtained. As such, the power applied to the fan motor 12a may be controlled.

  When configured in this manner, the control unit H sets the normal set ventilation volume and the set air volume such as the 24-hour set ventilation volume based on the relationship between the target rotational speed of the fan motor 12a and the applied power to the fan motor 12a. Therefore, the power applied to the fan motor 12a is controlled so that the target rotation speed of the fan motor 12a corresponding to the above-mentioned is reached.

  Further, in such a configuration, in order to know the power applied to the fan motor 12a, it is necessary to know the energization current to the fan motor 12a in addition to the voltage applied to the fan motor 12a. Compared with the case where the voltage applied to 12a is the electrical input value to the fan motor 12a, the configuration of the control unit is complicated, but it has a close correlation with the air volume of the bathroom heating ventilator (air volume controller). By using the electric power applied to the fan motor 12a as an electric input value to the fan motor 12a, the voltage applied to the fan motor 12a can be set to be an electric input value to the fan motor 12a. It is possible to prevent the air volume of the air volume control device from deviating from a desired air volume due to the variation.

DESCRIPTION OF SYMBOLS 11 Ventilation fan casing 12 Ventilation fan 12a Fan motor 13 Intake port 14 Exhaust port 16 Intake joint 17 Intake duct 18 Exhaust joint 19 Exhaust duct A Bathroom B Bathroom unit C Toilet D Dressing room E Ventilation unit

Claims (5)

A plurality of inlet passages for intake and exhaust can be connected to a plurality of connection ports of a fan casing in which a fan for ventilation is accommodated, in a plurality of different arrangement forms, and a fan motor that drives the fan, An air volume control device comprising control means for controlling the rotational speed of the fan motor according to an electrical input value to the fan motor,
Setting information indicating the relationship between the rotational speed of the fan motor and the electrical input value corresponding to each of the plurality of arrangement forms is provided with storage means that is stored in advance according to the amount of ventilation,
The control means determines which of the plurality of arrangement forms the connection of each ventilation path to the fan casing is, and the setting of the storage means corresponding to the determined arrangement form Controlling the rotational speed of the fan motor based on the information;
An air volume control device characterized by that. In the test operation mode before the connection of each ventilation path to the plurality of connection ports of the fan casing is completed, the control means determines which arrangement form the connection is, and In the normal operation mode after the connection is completed, the rotational speed of the fan motor is controlled based on the setting information of the storage unit corresponding to the determined arrangement form.
The air volume control device according to claim 1. Detecting means for detecting presence / absence of connection of the air passages to the plurality of connection ports of the fan casing;
The control means determines, based on the detection output of the detection means, which arrangement form of the plurality of arrangement forms the connection of each ventilation path to the fan casing is.
The air volume control device according to claim 1. The electrical input value to the fan motor is an applied voltage to the fan motor.
The air volume control device according to any one of claims 1 to 3. The electrical input value to the fan motor is the applied power to the fan motor,
The air volume control device according to any one of claims 1 to 3.

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