JP2010164253A - Ceiling-embedded ventilator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ceiling-embedded ventilator having a DC motor fixing configuration stable in quality without degrading ventilating performance. <P>SOLUTION: The DC motor 15 is received inside of a motor fixing case 16 formed by joining an upper case 16b opened at its lower part, to a lower case 16a fitted and fixed in a case fixing hole 22A formed on a top plate 14A of a body frame 3 and opened at its upper part, and fixed in a state of being vertically held by the lower case 16a and the upper case 16b through vibration-proofing rubber 17, thus a part of the DC motor 15 can be inserted into the body frame 3 and mounted on the top plate 14a through the vibration-proofing rubber 17 without cracking and wrinkling the top plate 14A. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a ceiling-embedded ventilation fan equipped with a DC motor that is connected to a duct that is piped behind the ceiling and communicates with the outside and is installed in an opening provided in a ceiling with a height restriction.

  Conventionally, as this type of ceiling-mounted ventilation fan, there has been known a configuration in which a motor is inserted from a top plate of a main body frame of a predetermined height and the total height is held within a height limit (for example, Patent Document 1).

  The ceiling-embedded ventilation fan will be described below with reference to FIG.

As shown in the figure, a recess 104 is provided on a top plate 105 of a main body frame 103 disposed on the ceiling of the room and having an opening 101 on the lower surface and an exhaust port 102 on a side surface so as to protrude into the main body frame 103. A cover 106 is provided which closes the upper surface opening of the recess 104 and forms the storage portion 110 together with the recess 104. The motor 108 is located in the recess 104, and the lower half is positioned in the recess 104. The fan 109 enclosed in the casing 107 is attached to the rotating shaft 108a of the motor 108.
JP-A-6-94279

  In such a conventional ceiling-mounted ventilation fan, when the motor 108 is a DC motor, vibrations peculiar to the DC motor are not transmitted to the main body frame 103 when the motor 108 is attached to the top plate 105 of the main body frame 103. It is necessary to attach an anti-vibration rubber, which is indispensable, between the top plate 105 and the cover 106. Therefore, the central portion of the top plate 105 must be drawn deeper into the inside of the main body frame 103 to form the recess 104, and a part of the DC motor must be inserted into the main body frame 103 and attached.

  However, if the central portion of the wide top plate 105 is squeezed deeply, cracks and wrinkles are likely to occur, and the quality is not stable. Further, in order to deal with the cracks and wrinkles, the suction area of the blades 109 in the main body frame 103 is reduced by gradually squeezing from the top plate 105 to the obtuse angle direction without suddenly squeezing from the top plate 105 in the vertical direction. There is a problem of making it.

  The present invention solves such a conventional problem, and an object of the present invention is to provide a ceiling-embedded ventilation fan having a DC motor fixed structure with stable quality without deteriorating ventilation performance. .

  In order to achieve the above object, the ceiling-embedded ventilation fan of the present invention has a main body frame having an open bottom surface and an exhaust port formed on a side surface, and a resin-molded DC motor attached to the top plate of the main body frame. A fan disposed inside the main body frame and driven to rotate by the DC motor; a fan surrounding the fan; a suction port on a lower surface; and a discharge port communicating with an exhaust port of the main body frame on a side surface. A ceiling-embedded ventilation fan having a fan casing, wherein the DC motor has a lower opening in a lower case of an upper opening that is fitted and fixed in a case fixing hole formed in a top plate of the frame Is housed in a motor fixing case formed by joining the upper case, and is fixed in a state of being sandwiched vertically by the lower case and the upper case via vibration-proof rubber. It is intended.

  Further, another means is that the anti-vibration rubber is an annular shape that is fitted and attached to a bearing house protruding from the vertical end face of the DC motor, and the inner peripheral side is thick and the outer peripheral side is thin on the DC motor side surface. An annular step is provided, and the outer peripheral side is attached so as to form a gap between the end face in the vertical direction of the DC motor.

  Another means is that the side surface of the lower case is formed substantially vertically.

  Another means is that a recess is formed on the inner wall surface of the motor fixing case so as to avoid contact with a gate mark by a resin mold of the DC motor.

  Another means is that the DC motor is arranged such that the electrical component is located on the upper case side.

  Another means is that the lower case and the upper case have the same shape.

  Another means is that the top plate of the main body frame can be switched to a model equipped with an AC motor by replacing the top plate with a motor fixing hole for directly fitting and fixing the AC motor. .

  According to the present invention, the DC motor is a motor formed by joining the upper case of the lower opening to the lower case of the upper opening that is fitted and fixed in the case fixing hole formed in the top plate of the frame. It is housed inside the fixing case, and is fixed in a state where it is sandwiched vertically between the lower case and the upper case via an anti-vibration rubber. Attaching to the top plate with rubber intervening has the effect that it can be achieved by the motor fixing case without deep cracking at the center of the wide top plate and generating cracks and wrinkles. Can be provided.

  The anti-vibration rubber is an annular shape that is fitted and attached to a bearing house that protrudes from the vertical end face of the DC motor. An annular step is provided on the surface of the DC motor so that the inner peripheral side is thick and the outer peripheral side is thin. By attaching the outer peripheral side so as to form a gap between the end face in the vertical direction of the DC motor, even if the DC motor is attached by applying a force that strongly compresses the anti-vibration rubber, the DC motor The vibration is not transmitted to the motor fixing case, and no large vibration is generated in the main body frame.

  In addition, since the side surface portion of the lower case is formed substantially vertically, even if the lower case is installed in the vicinity of the fan suction port, it is possible to almost eliminate the deterioration of the fan suction performance.

  In addition, by forming a recess on the inner wall of the motor fixing case to avoid contact with the gate mark of the resin mold of the DC motor, the gate mark generated by the mold does not contact the motor fixing case. The vibration of the DC motor is not transmitted from the motor fixing case to the main body frame.

  In addition, by arranging the DC motor so that the electrical component is located on the upper case side, water that has entered the motor fixing case for some reason does not flow to the charging unit of the electrical component, and safety is improved. It can be secured.

  In addition, by making the lower case and the upper case the same shape, for models with a reverse-rotating DC motor, the DC motor is simply flipped up and down in the same motor fixing case with the rotor in the same direction. And can respond.

  In addition, by replacing the top plate of the main body frame with a top plate with a motor fixing hole for directly fitting and fixing the AC motor, it can be switched to a model equipped with an AC motor. In addition, the same basic structure can be easily switched.

  The ceiling-embedded ventilation fan according to claim 1 of the present invention is such that the DC motor is inserted into a case fixing hole formed in the top plate of the frame and fixed to the lower case of the upper opening and the upper side of the lower opening. The case is housed in a motor fixing case formed by joining the case, and is fixed in a state of being sandwiched in the vertical direction by the lower case and the upper case via vibration-proof rubber. When a part of the motor is inserted into the main body frame and attached to the top plate, the motor fixing case formed by joining the lower case housing the DC motor and the upper case is fixed to the top plate. The motor has an effect that it can be attached to the top plate with an anti-vibration rubber interposed between the motor and the top plate.

  Further, in the ceiling-embedded ventilation fan according to claim 2, the anti-vibration rubber is an annular shape that is fitted and attached to a bearing house protruding from the vertical end surface of the DC motor. An annular step is provided in which the inner peripheral side is thicker and the outer peripheral side is thinner, and the outer peripheral side is attached so as to form a gap with the end surface in the vertical direction of the DC motor. The outer peripheral side of the anti-vibration rubber is in the vertical direction of the DC motor. By attaching so as to form a gap with the end face, the outer peripheral side of the anti-vibration rubber is not strongly tightened so as to be crushed due to the dimensional variation of each part and the clamping state of the DC motor.

  In the ceiling-embedded ventilation fan according to claim 3, the side surface portion of the lower case is formed substantially vertically, and the lower case is inserted into the main body frame and is also provided in the vicinity of the fan inlet. Although it will be located, the influence on the suction performance of the fan can be minimized by the fact that the side surface portion is substantially vertical.

  According to a fourth aspect of the present invention, there is provided a ceiling-embedded ventilation fan in which a recess is formed on the inner wall surface of the motor fixing case so as to avoid contact with a gate mark by a resin mold of the DC motor. Due to the recess, the trace of the gate due to is not reliably brought into contact with the motor fixing case.

  Further, the ceiling-embedded ventilation fan according to claim 5 is a DC motor arranged such that the electrical component is positioned on the upper case side, and even if water enters the motor fixing case, Water does not flow to the charging section of the electrical equipment section.

  In the ceiling-embedded ventilation fan according to claim 6, the lower case and the upper case have the same shape, and the DC motor is rotated in the up-down direction with the rotor in the same direction, so that the reverse rotating DC Compatible with models equipped with motors.

  The ceiling-embedded ventilation fan according to claim 7 is a model in which the top plate of the main body frame is replaced with a top plate formed with a motor fixing hole for directly fitting and fixing the AC motor. AC motor that can be directly fixed to the top plate with the same top plate by replacing the mold nesting and replacing it with the motor fixing hole. You can switch to a model that wears.

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

(Embodiment 1)
As shown in FIG. 1, a fan casing 5 having a side surface and a top plate 14 </ b> A having a discharge adapter 2 communicating with an exhaust port (not shown) on a side in a scroll shape, and a lower surface from a lower surface opening 5 a of the fan casing 5. The main body frame 3 is composed of a box-shaped frame 8 extending to the bottom and having an opening 1 on the lower surface. That is, the fan casing 5 forms the upper side of the main body frame 3. The main body frame 3 is attached by being inserted into the back of the ceiling through an opening formed in the ceiling, and a louver 9 covering the opening 1 is detachably attached to the lower surface. The lower surface opening 5a of the fan casing 5 is provided with a casing cover 4 having a cover opening 4a having a diameter larger than the outer diameter of the enclosing fan 7, and the lower surface of the cover opening 4a has a diameter smaller than the outer diameter of the fan 7. An orifice 11 having a suction port 10 includes an engagement piece 12 provided on the outer periphery thereof, and an engagement portion 13 provided at a position of the fan casing 5 corresponding to the engagement piece and engaged with the engagement piece 12. It is detachably attached by engaging and disengaging. Engagement and disengagement between the locking piece 12 and the engaging portion 13 is performed by pushing up and engaging with the hand and releasing the engagement with the fingertip. A centrifugal blower is configured by the fan casing 5, the casing cover 4, the orifice 11, the fan 7, and the motor 6 that rotationally drives the fan 7.

  As shown in FIG. 2, the motor 6 is a resin-molded DC motor 15 and is housed in a motor fixing case 16 formed by joining a lower case 16a of an upper opening and an upper case 16b of a lower opening. The lower case 16a and the upper case 16b are sandwiched in the vertical direction via the anti-vibration rubber 17, and are fitted and fixed in the case fixing holes 22A of the top plate 14A (see FIG. 1). A recess 20 is formed on the inner wall surface of the motor fixing case 16 so as to avoid contact with the gate mark of the resin mold of the DC motor 15. The anti-vibration rubber 17 is an annular shape that is fitted and attached to a bearing house 21 protruding in the vertical direction of the DC motor 15. An annular step 18 having a thick inner peripheral side and a thin outer peripheral side is formed on the surface of the DC motor 15. A gap 19 is formed between the outer peripheral side and the vertical end surface of the DC motor 15.

  As shown in FIGS. 3 and 4, the side portions of the lower case 16a and the upper case 16b are formed substantially vertically, and the electrical component 24 of the DC motor 15 is arranged on the upper case 16b side. Yes.

  Furthermore, as shown in FIG. 5, the mold of the top plate 14A is made replaceable and replaced with a top plate 14B having a motor fixing hole 22B for directly fitting and fixing the AC motor 25, It is possible to switch to a model equipped with an AC motor 25.

  Conventionally, the ceiling-embedded ventilation fan having the above-described structure may cause wrinkles or cracks when the top plate is drawn, and the top plate cannot be used. By making it a component of 16b and cutting it along the outer periphery after drawing, it is possible to remove the wrinkled or cracked portion and obtain a drawn shape with stable quality.

  Further, for the above reasons, it is possible to narrow the side surface portion of the lower case 16a or the upper case 16b more vertically. In particular, the lower case 16a is arranged on the outer peripheral side such as a centrifugal blower blade as shown in FIG. In the fan 7 having a shape that surrounds the DC motor 15 with the disposed blades 23, the area between the side surface portion of the lower case 16a serving as the suction port of the fan 7 and the blades 23 can be maximized. The impact can be minimized.

  Further, the anti-vibration rubber 17 is annular and has an annular step 18 on the surface on the DC motor 15 side where the inner peripheral side is thick and the outer peripheral side is thin, and the outer peripheral side is a gap 19 between the vertical end surface of the DC motor 15. Therefore, the outer peripheral side of the anti-vibration rubber 17 is not strongly tightened so as to be crushed due to the dimensional variation of each part and the clamping state of the DC motor 15.

  Further, since the recess 20 is formed on the inner wall surface of the motor fixing case 16 so as to avoid contact with the gate mark due to the resin mold of the DC motor 15, the gate mark contacts the motor fixing case 16 so that the DC The vibration of the motor 15 can be prevented from spreading over the entire ceiling-embedded ventilation fan.

  Even if water drops on the top plate 14A due to condensation on the back of the ceiling, water enters the motor fixing case 16 and accumulates in the motor fixing case 16, the electrical component 24 remains in the upper case. Since it is provided so as to be positioned on the 16b side, the water level only rises to the vicinity of the top plate 14A, so that water does not touch the electrical equipment section 24, and safety can be ensured.

  Further, the mold of the top plate 14A can be nest exchanged, and the top plate 14B having a motor fixing hole 22B capable of directly fixing the AC motor 25 can be easily formed, so that the DC motor 15 or the AC motor can be formed. It is easy to switch between 25 models.

  As described above, according to the ceiling-embedded ventilation fan of the first embodiment, the DC motor fixed configuration in which the vibration of the DC motor 15 is not transmitted without lowering the ventilation performance and the drawing process is performed with stable quality. It is possible to provide an embedded ceiling-mounted ventilation fan.

(Embodiment 2)
The ceiling-embedded ventilation fan of the second embodiment is characterized in that the lower case 16a and the upper case 16b have the same shape as the ceiling-embedded ventilation fan of the first embodiment, and other configurations are as follows. There is no difference and description thereof is omitted.

  With the above-described configuration, the DC motor 15 can be easily turned into a reverse rotation DC motor by turning the rotor in the same direction in the motor fixing case 16 and reversing in the vertical direction. The motor fixing case 16 can be used for other ceiling-embedded ventilation fans.

  The present invention is a device in which a diaphragm shape protruding inside the main body can be obtained with stable quality in order to position and fix a part of the DC motor inside the main body, and the vibration of the DC motor is not transmitted to the main body. Thus, the present invention can be widely applied in providing a device equipped with a DC motor that can be attached to a ceiling with a height restriction.

The principal part disassembled perspective view which shows the ceiling embedded type ventilation fan of Embodiment 1 of this invention The principal part exploded perspective view which shows the structure which concerns on the DC motor of the same ceiling embedded type ventilation fan Cross section of the DC motor Cross section of the ceiling-mounted ventilation fan Perspective view with AC motor replaced and mounted on the ceiling-mounted ventilation fan Sectional view showing a conventional ceiling-mounted ventilation fan

DESCRIPTION OF SYMBOLS 1 Opening 3 Main body frame 5 Fan casing 7 Fan 10 Suction port 14A Top plate 14B Top plate 15 DC motor 16 Motor fixing case 16a Lower case 16b Upper case 17 Anti-vibration rubber 18 Level difference 19 Gap 20 Recess 21 Bearing house 22A Case fixing Hole 22B Motor fixing hole 24 Electrical component 25 AC motor

Claims (7)

A main body frame having an opening on the bottom surface and an exhaust port formed on the side surface, a resin-molded DC motor attached to the top plate of the main body frame, and disposed inside the main body frame, and driven to rotate by the DC motor. A ceiling-embedded ventilation fan comprising: a fan that surrounds the fan; and a fan casing having a suction port on a lower surface and a discharge port communicating with an exhaust port of the main body frame on a lower surface, Is housed in a motor fixing case formed by joining an upper case of a lower opening to a lower case of an upper opening that is fitted and fixed in a case fixing hole formed in the top plate of the frame. The ceiling-embedded ventilation fan, which is fixed in a state of being vertically sandwiched between the lower case and the upper case via an anti-vibration rubber. The anti-vibration rubber is an annular shape that is fitted into and attached to a bearing house protruding from the vertical end surface of the DC motor, and the DC motor side surface is provided with an annular step that is thick on the inner peripheral side and thin on the outer peripheral side, The ceiling-embedded ventilation fan according to claim 1, wherein the outer peripheral side is attached so as to form a gap between the DC motor and the end face in the vertical direction. 2. The ceiling-embedded ventilation fan according to claim 1, wherein a side surface portion of the lower case is formed substantially vertically. The ceiling-embedded ventilation fan according to any one of claims 1 to 3, wherein a recess is formed on an inner wall surface of the motor fixing case so as to avoid contact with a gate mark by a resin mold of a DC motor. The ceiling-embedded ventilation fan according to any one of claims 1 to 4, wherein the DC motor is disposed such that the electrical component is positioned on the upper case side. The ceiling-embedded ventilation fan according to any one of claims 1 to 3, wherein the lower case and the upper case have the same shape. The ceiling-embedded ventilation fan according to claim 1, wherein the ceiling plate of the main body frame can be switched to a model equipped with an AC motor by replacing the top plate with a motor fixing hole for directly fitting and fixing the AC motor. .

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