JP2010270978A - Simultaneous air supply and exhaust type ventilator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simultaneous air supply and exhaust type ventilator capable of miniaturizing a ceiling panel by reducing a size of the simultaneous air supply and exhaust type ventilator, and improving workability in turning a control switch on a circuit board, and maintenance of circuit components. <P>SOLUTION: When a region of a circuit section positioned inside of a panel outer jacketing frame 2 is a first region, and a region excluding the first region, of the circuit section is a second region in a projection face from a lower face of the simultaneous air supply and exhaust type ventilator, a maintenance opening 24 is formed inside of the panel outer jacketing frame 2 in a state of facing the first region, and a control set switch 21 is disposed in the first region. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a simultaneous supply / exhaust type exhaust fan, and more particularly, to a simultaneous supply / exhaust type exhaust fan that blows air into a room from a panel outlet while sucking room air from a panel inlet formed by a decorative panel fixed to a ceiling. .

  In order to realize ventilation with little fluctuation of indoor temperature and humidity, there is a method of simultaneous supply / discharge while attaching a simultaneous supply / exhaust type ventilation fan to the ceiling and exchanging heat.

In such a simultaneous supply / exhaust ventilation fan, as a method of switching the control setting switch on the control board and maintaining the circuit part, the ceiling panel opening at the bottom of the exterior casing of the simultaneous supply / exhaust ventilation fan is placed on the side of the exterior casing There is a structure in which work is performed after the arranged circuit part is drawn into the outer casing. For example, Japanese Patent Application Laid-Open No. 11-248190 discloses a simultaneous supply / exhaust ventilation fan installed on a ceiling surface. According to this, a space is provided between the outer casing and the heat exchanger, the circuit component mounting plate that fixes the circuit unit case to the outer casing is removed using the interval, and the circuit unit case is drawn into the outer casing. Discloses a structure capable of performing maintenance of circuit components.
JP-A-11-248190

  However, according to the technique of Patent Document 1, when switching the control switch on the circuit board or performing maintenance of the circuit component, the entire circuit component case must be removed from the outer casing and pulled into the outer casing before switching the control switch. It was necessary to perform work such as work and replacement of electrical parts, which was very time-consuming work. Therefore, in addition to the control settings that can be performed by communication from the external remote control for requests for control changes that frequently occur immediately after completion or at the beginning of operation, there are also control settings that are performed by switching setting switches on the control board. In this case, even if the work is simple and easy, simply switching the control setting switch on the control board, the circuit case must be removed and pulled inward as described above. There is a problem that it has to be done in a state and is very troublesome. Furthermore, in this simultaneous supply / exhaust type exhaust fan, it is necessary to provide a work space in the outer casing for removing the entire circuit case from the outer casing, drawing it into the outer casing, and taking out the circuit case from the outer casing. The size of the simultaneous supply / exhaust ventilation fan increases by the size of the exterior casing, and the ceiling panel size also increases, and the design of the ceiling surface, such as an increased feeling of pressure on the ceiling surface, is impaired. There was a problem that the place where it can be installed was restricted by the increase in the size of the supply / exhaust ventilation fan.

  The present invention has been made in view of the above, and the size of the simultaneous supply / exhaust ventilation fan is reduced to reduce the ceiling panel, and the switching work of the control switch on the circuit board and the maintenance workability of the circuit parts are performed. An object is to obtain a simultaneous supply / exhaust ventilation fan capable of improving the efficiency.

  In order to solve the above-described problems and achieve the object, a simultaneous supply / exhaust ventilation fan according to the present invention includes an exterior casing in which an exhaust ventilation path and an intake ventilation path independent from each other are formed, and a lower part of the exterior casing. A ceiling panel provided with a panel suction port and a panel outlet, a panel exterior frame provided between the exterior casing and the ceiling panel, and housed in the exterior casing and sucked into the panel suction port The exhaust air blower that sends the sucked airflow to the exhaust ventilation path and exhausts it as an exhaust flow, and the air supply that sends the airflow supplied to the air supply ventilation path to the panel outlet and blows it out as the blowout airflow A simultaneous supply / exhaust ventilation fan comprising a blower, a heat exchanger that exchanges heat between the exhaust flow and the supply air flow, and a circuit unit that controls the operation of the exhaust blower and the supply blower. In this case, a region located within the frame of the panel exterior frame of the circuit unit when viewed from the lower surface side is defined as a first region, a region of the circuit unit other than the first region is defined as a second region, and the first region A maintenance opening is provided in the frame of the panel exterior frame so as to face the area of 1.

  According to the present invention, it is possible to reduce the size of the simultaneous supply / exhaust ventilation fan and the ceiling panel, and to improve the switching workability of the control switch on the circuit board.

This figure shows the perspective view which showed the external appearance structure of the simultaneous supply / exhaust type ventilation fan based on Embodiment of this invention. This figure is a cross-sectional view of the simultaneous supply / exhaust ventilation fan of FIG. 1 cut along the flow direction of the suction airflow A1 and the blowout airflow B2. This figure is a perspective view from the lower surface side showing an example of the internal configuration of the simultaneous supply / exhaust ventilation fan according to the embodiment of the present invention through the exterior casing 1, the ceiling panel 3, and some internal components (without instructions). It is. This figure is a perspective view from the lower surface side showing an example of the internal configuration of the simultaneous supply / exhaust type ventilation fan of FIG. This figure is a bottom view showing a state where the ceiling panel 3 of the simultaneous supply / exhaust type ventilation fan of FIG. 1 is removed. This figure is a side view showing the vicinity of the circuit case of the simultaneous supply / exhaust ventilation fan of FIG. This figure is a cross-sectional view of the circuit part case 10 part seen from the AA cross section of the simultaneous supply / exhaust type ventilation fan of FIG. This figure is a bottom view showing circuit components arranged on the circuit unit mounting base 20 of the simultaneous supply / exhaust type ventilation fan according to the embodiment of the present invention. This figure is a bottom view showing a state in which the maintenance cover 25 of the simultaneous supply / exhaust ventilation fan of FIG. 5 is removed. This figure is the perspective view from the lower surface side which shows the state which installed the simultaneous supply / exhaust type ventilation fan based on Embodiment of this invention in the ceiling material 19. FIG. This figure is a perspective view from the lower surface side showing a state in which the ceiling panel 3 is removed by a simultaneous supply / exhaust ventilation fan installed on the ceiling member 19 of FIG. This figure is the bottom view which shows the state which moved the circuit part mounting base 20 at the time of a maintenance operation | work with the simultaneous supply / exhaust type exhaust fan which concerns on embodiment of this invention. This figure is a side view showing the vicinity of the circuit unit case part of the simultaneous supply / exhaust type ventilation fan in a state where the circuit unit mounting base 20 is moved during the maintenance work of FIG.

SI air supply port SO exhaust port UI panel suction port UO panel air outlet A1 suction airflow A2 exhaust air flow B1 airflow air B2 airflow 1 exterior casing 2 panel exterior frame 3 ceiling panel 4 main body opening 5a exhaust motor 5b air supply motor 6a Exhaust blade 6b Supply blade 7a Exhaust fan 7b Exhaust fan 8a Exhaust fan casing 8b Exhaust fan casing 9 Heat exchanger 10 Circuit unit case 10a Circuit unit case side plate 10b Back surface 12 Separator 14a Exhaust ventilation Road 14b Air supply ventilation path 15a Exhaust chamber 15b Air supply chamber 16 Dust removal filter 17 Blower outlet 19 Ceiling material 20 Circuit unit mounting base 21 Control setting switch 22 Control board 23 Electrical component 24 Circuit unit maintenance port 25 Maintenance cover 26a Guide rail 26b Guide rail

Embodiments of a simultaneous supply / exhaust ventilation fan according to the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the embodiments.
FIG. 1 is a perspective view showing an external configuration of a first embodiment of a simultaneous supply / exhaust ventilation fan according to the present invention, and FIG. 2 shows the simultaneous supply / exhaust ventilation fan of FIG. It is sectional drawing cut | disconnected and shown along. In FIG. 1, a simultaneous supply / exhaust ventilation fan is provided with a box-shaped outer casing 1 having six surfaces as a ventilation fan body, and a ceiling panel 3 is attached to the lower side of the outer casing 1 via a panel outer frame 2. ing. The panel exterior frame 2 is configured in a rectangular tube shape. The ceiling panel 3 uses a decorative panel.

  On the side surface of the exterior casing 1, there are provided an exhaust port SO for exhausting the exhaust flow A <b> 2 out of the exterior casing 1 and an air supply port SI for supplying the airflow B <b> 1 into the exterior casing 1. Further, a panel suction port UI for sucking the suction airflow A1 and a panel blowout port UO for blowing the blowout airflow B2 are formed in the ceiling panel 3 below the outer casing 1.

  In the outer casing 1, an exhaust ventilation path 14 a that constitutes a ventilation path between the panel suction port UI and the exhaust outlet SO, and an air supply path that constitutes a ventilation path between the supply port SI and the panel outlet UO. The ventilation path 14b is provided independently of each other.

  When this simultaneous supply / exhaust ventilation fan is installed indoors, the ceiling panel 3 is protruded indoors from the ceiling surface 19 and the outer casing 1 is disposed behind the ceiling.

  When the indoor suction airflow A1 is sucked from the panel suction port UI, the suction airflow A1 is guided into the outer casing 1. And the suction | inhalation airflow A1 guide | induced in the exterior casing 1 is guide | induced to the exhaust port SO by passing the exhaust ventilation path 14a, and is exhausted outdoors as the exhaust flow A2.

  At the same time, when the outdoor air supply air B1 is supplied from the air supply port SI, the air supply air B1 is guided into the outer casing 1. Then, the air supply air B1 guided into the outer casing 1 is guided to the panel outlet UO by passing through the air supply passage 14b, and is blown into the room as the air flow B2.

  FIG. 3 is a perspective view from the lower surface side showing an example of the internal configuration of the simultaneous supply / exhaust type ventilation fan of FIG. 1, and FIG. 4 is a cutaway example of the internal configuration of the simultaneous supply / exhaust type ventilation fan of FIG. 3. It is a perspective view from the lower surface side shown. 3 and 4, the upper part in the figure is the lower surface side.

  3 to 4, on the lower surface of the outer casing 1, the intake airflow A <b> 1 sucked into the panel suction port UI is taken into the outer casing 1, or the supply airflow B <b> 1 sucked into the outer casing 1 is supplied to the outer casing 1. A main body opening 4 for discharging to the outside is formed. A ceiling panel 3 is attached below the outer casing 1 so as to cover the main body opening 4 via the panel outer frame 2. Here, the ceiling panel 3 is provided with a separator 12 that prevents the suction airflow A1 sucked from the panel suction port UI from intersecting the blowout airflow B2 blown from the panel blowout port UO. In addition, the separator 12 can be comprised with a partition plate or a partition, and is arrange | positioned so as to be orthogonal to the suction direction of suction airflow A1, and the blowing direction of blowing airflow B2.

  Further, on both sides of the panel exterior frame 2, wall surfaces 2 a and 2 b are formed that restrict the advancing direction along the ceiling panel 3 of the suction airflow A1 and the blowout airflow B2 in one direction.

  Further, the outer casing 1 is partitioned so that the exhaust flow A2 exhausted from the exhaust port SO and the supply air flow B1 supplied from the air supply port SI do not intersect within the outer casing 1, so that the exhaust ventilation path 14 a. And the air supply passage 14b are formed in the outer casing 1 independently of each other. The exterior casing 1 accommodates an exhaust fan 7a, an air supply fan 7b, a heat exchanger 9, and a circuit unit case 10. Here, the exhaust fan 7a is disposed in the exhaust ventilation path 14a. The air supply blower 7b is disposed in the air supply ventilation path 14b. The heat exchanger 9 is disposed on the exhaust ventilation path 14a and the supply ventilation path 14b.

  The exhaust blower 7a sends the suction airflow A1 sucked into the panel suction port UI to the exhaust ventilation path 14a and exhausts it from the exhaust port SO as the exhaust flow A2. The exhaust fan 7a includes an exhaust blade 6a that forms the exhaust flow A2, an exhaust motor 5a that rotates the exhaust blade 6a, and a spiral shape that is configured to surround the exhaust blade 6a and the exhaust motor 5a. The exhaust fan casing 8a and the like are used.

  Further, the air supply blower 7b sends the air supply air B1 supplied from the air supply port SI to the air supply passage 14b to the panel outlet UO and blows out as the outlet air flow B2 from the panel outlet UO. The air supply fan 7b includes an air supply blade 6b that forms the air supply air flow B1, an air supply motor 5b that rotates the air supply blade 6b (shown in FIG. 5), and an air supply blade 6b that supplies air. It is composed of a spiral air supply fan casing 8b configured to surround the electric motor 5b. The air supply fan casing 8 b is formed with a blower outlet 17 that blows out the air supply air B <b> 1 so as to face the ceiling panel 3.

  As shown in FIG. 4, the heat exchanger 9 has a hexahedral structure in which exhaust air passages and air supply air passages that are orthogonal to each other are alternately stacked, and a suction air flow sucked into the panel suction port UI. Heat exchange can be performed between A1 and the air supply air B1 supplied from the air supply port SI. And about the exhaust flow A2, the ventilation path in the heat exchanger 9 is ensured in the orthogonal | vertical direction with respect to the ceiling panel 3, and about the supply air flow B1, the ventilation path in the heat exchanger 9 is in the blowing direction of the blowing air flow B2. The heat exchanger 9 is disposed in the outer casing 1 so as to ensure the above.

  Here, the supply port SI and the exhaust port SO are arranged side by side so as to open in a direction parallel to the suction direction of the suction airflow A1 and the blowout direction of the blowout airflow B2. Further, the air inlet SI, the heat exchanger 9 and the air supply fan 7b are arranged in this order along the suction direction of the suction airflow A1 and the blowout direction of the blowout airflow B2. Further, the exhaust port SO, the exhaust fan 7a, and the circuit unit case 10 are arranged in this order along the suction direction of the suction airflow A1 and the blowout direction of the blowout airflow B2. That is, the heat exchanger 9 and the circuit unit case 10 are arranged at one diagonal position of the outer casing 1, and the air supply fan 7 b and the exhaust fan 7 a are arranged at the other diagonal position of the outer casing 1. Has been.

  Further, the exhaust blade 6a is generally disposed at a position on an extension line of the heat exchanger 9 in the stacking direction. The exhaust motor 5a is disposed on the heat exchanger 9 side. The exhaust fan casing 8a is connected to the exhaust port SO.

  In addition, an air supply side dust removal filter 16 that performs dust removal of the airflow B1 is installed between the air supply port SI and the heat exchanger 9. Further, the space under the outer casing 1 partitioned by the panel outer frame 2 is divided into two by the separator 12, so that the exhaust chamber 15a that leads to the exhaust vent passage 14a and the supply chamber 15b that leads to the supply vent passage 14b. Is formed.

  Then, when the exhaust vane 6a and the supply vane 6b are respectively rotated by the exhaust motor 5a and the supply motor 5b, the indoor intake airflow A1 is drawn horizontally along the ceiling surface from the panel intake port UI. In addition, the outdoor air supply air B1 is supplied from the air supply port SI.

  When the suction airflow A1 is sucked horizontally along the ceiling surface from the panel suction port UI, the forward direction is blocked by the separator 12, so the traveling direction of the suction airflow A1 is changed, and the exhaust airflow A2 is heated. Guided to exchanger 9. Further, when the outdoor airflow B1 is sucked from the air supply port SI, the heat exchanger 9 is installed in front of the air supply port SI, and therefore the airflow B1 is guided to the heat exchanger 9. When the exhaust flow A2 and the supply airflow B1 are guided to the heat exchanger 9, the exhaust flow A2 flows into the exhaust fan 7a after the total heat exchange is performed between the exhaust flow A2 and the supply airflow B1. At the same time, the air supply air B1 flows into the air supply fan 7b. Here, by performing heat exchange between the exhaust air flow A2 and the air supply air flow B1, exhaust heat can be recovered, and the load on air conditioning can be reduced.

  When the exhaust flow A2 flows into the exhaust fan 7a, the exhaust fan A is guided in the direction of the exhaust port SO by the exhaust fan 7a and exhausted from the exhaust port SO to the outside of the room. On the other hand, when the air supply air B1 flows into the air supply blower 7b, the air supply blower 7b guides the airflow B1 toward the ceiling panel 3 and sends it out through the air blower outlet 17. When the air supply air B1 is sent out through the blower outlet 17, the front is blocked by the ceiling panel 3, the sides are blocked by the wall surfaces 2a and 2b, and the rear is blocked by the separator 12. It is blown out into the room as a blown airflow B2 from the panel outlet UO.

  FIG. 5 is a bottom view showing a state where the ceiling panel 3 of the simultaneous supply / exhaust ventilation fan shown in FIG. 1 is removed. FIG. 6 is a side view showing the vicinity of the circuit case 10 of the simultaneous supply / exhaust ventilation fan of FIG. FIG. 7 is a cross-sectional view of the circuit case 10 part seen from the AA cross section of the simultaneous supply / exhaust type ventilation fan of FIG. FIG. 8 is a bottom view showing circuit components arranged on the circuit unit mounting base. FIG. 9 is a bottom view showing a state where the maintenance cover 25 of the simultaneous supply / exhaust type ventilation fan of FIG. 5 is removed.

  In FIG. 5, the circuit unit case 10 is a box having six surfaces formed of metal, and one surface of the circuit unit case 10 is close to the air supply fan casing 8 b of the air supply fan 7 b, One surface is close to the exhaust fan casing 8a of the exhaust fan 7a, and is disposed in the supply air passage 14b in the vicinity of the supply fan 7b and in the exhaust ventilation path 14a in the vicinity of the exhaust fan 7a. The exhaust ventilation path 14a or the supply air ventilation path 14b and the inside of the circuit unit case 10 and the exhaust ventilation path 14a and the supply air ventilation path 14b are partitioned so as not to move air and are independent of each other. ing. 6 to 8, a pedestal-shaped circuit unit mounting base 20 is provided on the back surface 10 b constituting the circuit case 10 inside the circuit unit case 10, and a control setting switch 21 is provided on the circuit unit mounting base 20. And a control board 22 in which electronic components and the like are integrated, and electrical parts 23 such as a transformer, a power supply terminal block, and a phase advance capacitor of the motor are arranged in an integrated manner, and the control setting switch 21 is arranged on the control board 22. They are gathered and arranged at a position away from the electrical component 23.

  6, among the six surfaces of the circuit unit case 10, the circuit unit case side plate 10 a constituting one surface on the air supply ventilation path 14 b side is one surface (a circuit unit maintenance port to be described later) facing the back surface 10 b of the circuit unit case 10. 24 is inclined so that the size of the surface 24 is larger than the depth 10b.

  In FIG. 9, when viewed from the projection surface from the lower surface, the circuit unit case 10 is located across the inside and outside of the panel exterior frame 2. On the back surface 10 b of the circuit unit case 10, approximately 1/3 on the left side is located within the frame of the panel exterior frame 2, and the remaining approximately 2/3 is located outside the frame of the panel exterior frame 2. Further, on one surface of the circuit unit case 10 (the surface on which a circuit unit maintenance port 24 described later is provided), approximately ½ of the left side is located within the frame of the panel exterior frame 2, and the remaining approximately ½ of the right side is the panel. It is located outside the frame of the exterior frame 2. Further, the circuit part mounting base 20 arranged on the back surface 10b of the circuit part case 10 is also located in the frame of the panel exterior frame 2 as the first region, and the remaining left side is substantially the right side. The 2/3 portion is located outside the panel outer frame 2 as a second region and is arranged inside the outer casing 1. A part of the control board 22 and a control setting switch 21 aggregated on the control board 22 are arranged in the first area of the circuit unit mounting base 20, and the remaining control boards 22 are arranged in the second area. Aggregated electrical parts 23 are arranged.

  The circuit unit case 10 is provided with a circuit unit maintenance port 24 as an opening so that the first region in the circuit unit case 10 faces, but the circuit unit maintenance port 24 has a maintenance cover 25. Since it is detachably attached with a screw and closed, the inside of the circuit unit case 10 and the exhaust ventilation path 14a and the supply ventilation path 14b are cut off so that dust or the like does not enter and accumulate in the circuit components. ing. Of the six surfaces of the circuit unit case 10, the circuit unit case side plate 10 a constituting one surface of the air supply ventilation path 14 b also configures one side of the circuit unit maintenance port 24, and the circuit unit case 10 is tightened with screws. The circuit unit case side plate 10a is detachably provided by screws. As described above, the circuit unit case side plate 10a is inclined to increase the size of the circuit unit maintenance port 24 to nearly twice the size of the first region, so that it is easy to put a hand inside the circuit unit maintenance port 24 and work. It is.

  Further, as shown in FIG. 7, both end faces of the circuit unit mounting base 20 are sandwiched between the guide rails 26 a and 26 b provided inside the circuit unit case 10 and the circuit unit case 10, so that the guide rail 26 a does not come off. , 26b, so that the circuit unit mounting base 20 moves. Here, the circuit unit mounting base 20 is fixed by contacting with the circuit unit case side plate 10a.

  Next, the case where the setting change of the control setting switch 21 on the control board 22 and the maintenance of the control board 22 and the electrical component 23 are performed will be described. FIG. 10 is a bottom perspective view showing an actual installation state of the simultaneous supply / exhaust type ventilation fan according to the present invention. The exterior casing 1 is disposed above the ceiling material 19 and is embedded in the ceiling. A panel exterior frame 2 is provided on the lower surface of the exterior casing 1, the panel exterior frame 2 is fitted into a rectangular square hole (not shown) provided in the ceiling material 19, and the ceiling material 19 is formed by the exterior casing 1 and the panel exterior frame 2. Is sandwiched. The ceiling panel 3 is fixed to the panel exterior frame 2, and a panel outlet UO and a panel suction port UI that are outlets of the air supply passage 14 b are formed.

  FIG. 11 shows a state in which the ceiling panel 3 is removed in order to perform setting change of the control setting switch 21 on the control board 22 and maintenance of the control board 22, the electrical component 23, the heat exchanger 9 and the like in the installation state of FIG. FIG. The control setting changing work and the maintenance work can be performed from the inside (opening) of the panel exterior frame 2 that appears after the ceiling panel 3 is removed. Maintenance of the heat exchanger 9 can be attached and detached by operating a fixing portion (not shown) to which the heat exchanger 9 is attached in this state. The change of the control setting switch 21 and the maintenance of the control board 22 and the electrical component 23 are performed by removing the screws fixing the maintenance cover 25 arranged in the frame (opening) of the panel exterior frame 2. The cover 25 can be removed, and the operation can be performed from the circuit portion maintenance port 24 that appears. As shown in FIG. 9, when the maintenance cover 25 is removed, the circuit unit maintenance port 24 appears, and the work from the circuit unit maintenance port 24 to the first area becomes possible, and the control setting switch 21 on the control board 22 is displayed. Can be easily changed. In this state, since the second region does not face from the circuit unit maintenance port 24, the maintenance work of the control board 22 and the electrical component 23 is not performed in this state.

Next, the maintenance work of the control board 22 and the electrical component 23 in the second area will be described.
FIG. 12 is a bottom view of the state in which the circuit unit mounting base 20 is moved to the first region side when maintaining the control board 22 and the electrical component 23, and FIG. 13 is a view when maintaining the control board 22 and the electrical component 23. The side view of the state which moved the circuit part mounting base 20 to the 1st area | region side is shown. In order to perform maintenance on the control board 22 and the electrical component 23 in the second area, first, the heat exchanger 9 is removed, and the air supply fan 7b (the air supply motor 5b) is removed from the space from which the heat exchanger 9 is removed. The air supply blade 6b and the air supply fan casing 8b) are removed, and a sufficient space is provided in the air supply air passage 14b with which the circuit unit case side plate 10a is in contact. Next, the screw to which the circuit unit case side plate 10a is fixed is removed, and the circuit unit case side plate 10a is removed. The circuit unit case side plate 10a is fixed in contact with the circuit unit mounting base 20 so as not to move. However, the circuit unit case side plate 10a is removed by removing the circuit unit case side plate 10a and is outside the circuit unit case 10. A space communicating with the supply air passage 14b is formed. Therefore, the entire circuit unit mounting base 20 appears by moving the circuit unit mounting base 20 toward the air supply passage 14b along the guide rails 26a and 26b, and the control board 22 and the electrical components 23 in the second area appear. Maintenance is possible.

  The control setting change work and maintenance work of the simultaneous supply / exhaust ventilation fan may be performed from the outside of the panel exterior frame 2, but a new hole for maintenance must be provided in the ceiling material 19, and the design of the ceiling surface Therefore, a structure that is performed from the inside of the panel outer frame 2 is indispensable. In the structure in which the control setting change work and the maintenance work are performed from the inside of the panel exterior frame 2, when the entire circuit unit case is arranged in the frame of the panel exterior frame 2 when viewed from the projection surface from the lower surface, the circuit unit case Although the panel exterior frame 2 becomes larger by the size of 10, the circuit unit case 10 is arranged across the inside and outside of the panel exterior frame 2 on the projection surface from the lower surface as in this embodiment, By facing the control setting switch 21 on the control board 22 from the circuit unit maintenance port 24 in the frame of the panel outer frame 2, the size of the panel outer frame 2 can be changed only by switching the control setting switch 21 on the control board 22. Since the size of the rectangular square hole (not shown) provided in the ceiling material 19 and the size of the lower surface panel 3 can be suppressed, the size of the ceiling panel 3 can be increased. Possible to prevent the design property due to increase in tightness is impaired due.

  The contents to be worked after installation of the circuit components in the circuit unit case 10 are roughly control setting change work and maintenance work. The frequent operation is a control setting changing operation, and the switching operation of the control setting switch 21 on the control board 22 is performed. The less frequent operation is a maintenance work in which the control board 22 and the electrical component 23 are exchanged when a failure occurs. is there. According to the present embodiment, the frequent switching operation of the control setting switch 21 can be easily performed in a short time without the need to remove the entire circuit unit case 10. In addition, the replacement work at the time of failure with a low work frequency is not necessary without removing the entire circuit unit case 10 and can be easily performed by moving the circuit unit mounting base 20.

  In addition, since the circuit unit case 10 and the exhaust fan 7a, the air supply fan 7b, and the like can be arranged close to each other, it is not necessary to provide a space for drawing the circuit unit case in the exterior panel 2, and therefore, As a result, the size of the entire simultaneous supply / exhaust type ventilation fan can be reduced, and the ceiling panel size 3 can be reduced by that much, thereby improving the design of the ceiling surface and increasing the place where it can be installed.

  As described above, the simultaneous supply / exhaust ventilation fan according to the present invention is a method for reducing the product size and the ceiling panel, and improving the switching work of the control setting switch on the circuit board and the maintenance workability of the circuit parts. Is suitable.

Claims (4)

  An exterior casing in which an exhaust ventilation path and an air supply ventilation path independent from each other are formed, a ceiling panel provided below the exterior casing, provided with a panel suction port and a panel outlet, the exterior casing, A panel exterior frame provided between the ceiling panels, an exhaust fan accommodated in the exterior casing and sucked into the panel suction port to be sent to the exhaust ventilation path and exhausted as an exhaust stream; An air supply blower for supplying an air supply air supplied to the air ventilation path to the panel outlet and blowing it out as an air outlet; a heat exchanger for performing heat exchange between the exhaust air flow and the air supply air; In a simultaneous supply / exhaust type exhaust fan including the exhaust fan and a circuit unit for controlling the operation of the air supply fan, a region located in the frame of the panel exterior frame of the circuit unit when viewed from the lower surface side A first region, a region of the circuit portion other than the first region is a second region, and a maintenance port is provided in the frame of the panel exterior frame so as to face the first region. Simultaneous supply / exhaust ventilation fan.   The simultaneous supply / exhaust ventilation fan according to claim 1, wherein a changeover switch for setting control is arranged in the first region.   The simultaneous supply / exhaust ventilation fan according to claim 1 or 2, wherein the circuit section is movably provided and moved so that the second region of the circuit section faces the maintenance port.   The simultaneous supply / exhaust type ventilation fan according to claim 3, wherein the circuit portion is attached to one mounting base, and the mounting base is movable by a sliding structure.

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