JP2014202420A - Ventilator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent oil droplets and water droplets adhering to a ventilation fan from falling down indoors and being transmitted to a wall so that the wall is not soiled. A ventilating fan comprising a main body frame 1 of a ventilating fan having an electric motor 2 and blades 4 and a ventilating fan cover 3 covering the main body frame 1 from the indoor side, and having a wind tunnel 31 around the center of the ventilating fan cover 3 and around the vanes 4. A suction port 31a is formed in the front part 33 of the cover and is connected to the wind tunnel 31. A concave oil receiver 32 is formed below the three front part 33 suction ports 31a of the ventilation fan cover, and the upper edge of the oil receiver 32 and the ventilation fan cover 3 The front portion 33 forms a chamfered portion 32a. [Selection] Figure 5

Description

  The present invention relates to a ventilation fan provided with an oil receiver at the lower part of a ventilation fan cover.

  Conventionally, there is a ventilation fan attached to a ventilation opening provided on a wall of a kitchen or the like. In these ventilation fans, the ventilation opening of the wall part is formed of a box-shaped wooden frame or the like, and the ventilation fan body frame is housed and installed in this wooden frame. Particularly in the kitchen, it is indispensable because it is used for the purpose of collecting combustion gas generated from cooking utensils such as gas stoves and oily smoke generated during cooking and discharging it outside the room. The indoor side of the ventilation fan is generally provided with a ventilation fan cover and is detachably attached to the main body frame. Most of the smoke, steam, etc. generated during cooking are discharged to the outside of the room, but oil, water, etc. that collide with the ventilation fan's air passage adhere to the ventilation fan. In particular, the ventilation fan cover that covers the frame of the ventilation fan body from the inside causes problems such as adhering oil or water that accumulates into oil droplets and water droplets, falling onto the cooking table, and soiling the wall along the indoor wall. there were.

  In order to prevent the fall of the attached oil droplets and water droplets and wall contamination, a container-shaped oil reservoir or an oil receiving portion for collecting oil droplets and water droplets to some extent is provided in a ventilation fan cover. This oil catcher is detachable from the ventilation fan cover so that only the oil catcher is removed periodically for easy cleaning, and a separate container is prepared in the oil catcher, and this container is periodically cleaned and replaced. Things have been proposed. (For example, Patent Documents 1 and 2)

In addition, a filter is attached to the front of the ventilation fan cover, and a concave oil receiving part is formed in the lower center of the suction port of the ventilation fan cover. The oil, water attached to the suction port, and the oil and water blown by the centrifugal force of the blades Has been proposed that can collect the material adhering to the periphery of the suction port.
Similarly, it has also been proposed that a filter is attached to the front face of the ventilation fan cover, and a groove portion is formed in the lower portion of the ventilation fan cover so as to project toward the room side. (For example, Patent Documents 3 and 4)

JP-A-62-276345 JP-A-62-272043 Japanese Utility Model Publication No. 1-82436 Japanese Patent Laid-Open No. 9-33081

  However, according to these conventional techniques, there are problems that it is difficult to clean the accumulated oil droplets and water droplets, and that the amount of oil droplets and water droplets accumulated in the oil receiving portion cannot be visually recognized. In particular, as in Patent Documents 1 and 2, for the case where the container-shaped oil receiving portion is attached to and detached from the ventilation fan cover, there are many cases where the method of removing and how to attach are not known. Further, the oil accumulated in the oil receiving part has a problem that it is necessary to remove the oil receiving part and visually recognize the inside, and cannot be confirmed from the outside.

Furthermore, since the oil receiving portion is detachable, the structure is complicated, and the shape of the ventilation fan cover including the oil receiving portion exposed to the indoor side is increased, which may impair the design. Furthermore, there has been a problem that the oil receiving part attaching / detaching structure fails due to deterioration of the material over time due to oil or chemicals that wash away the oil.

  On the other hand, although the thing of patent documents 3 and 4 is provided integrally with the ventilation fan cover, it is required to remove the filter for cleaning and to check the amount of oil accumulated by removing the filter, respectively. In addition, as in Patent Document 3, the one that forms the concave oil receiving portion in the suction port cannot obtain the optimum shape of the suction port, and the flow of the sucked air is obstructed, leading to deterioration in noise and a reduction in air volume. . In addition, as in Patent Document 4, an oil receiving portion whose tip protrudes indoors from the ventilation fan cover obstructs the flow of the sucked oil smoke, and exhaust collection efficiency for collecting the ventilation fan oil smoke, There was a possibility of lowering the collection efficiency.

The present invention has been made to solve the above-described problems, and has a highly reliable oil receiving portion in which oil droplets and water droplets adhering to a suction port or a blade of a ventilation fan do not fall indoors. The purpose is to obtain a ventilation fan. It is another object of the present invention to provide a ventilating fan that can reduce the number of parts and the like, can confirm the state of oil accumulation, obtain an oil receiving portion with good cleaning properties, and have excellent characteristics of the ventilating fan itself.

An air blower having an electric motor and blades is incorporated, and a box-shaped main body frame having an air passage formed by opening the indoor side and the outdoor side, and a ventilation fan cover for covering the indoor side of the main body frame are provided.
This ventilation fan cover is provided with an air inlet and is detachably formed on the main body frame. An oil receiving portion is provided below the suction port of the ventilation fan cover, the oil receiving portion is formed in a concave shape in cross section, and a chamfered portion is formed in the upper edge portion of the concave shape.

  According to the present invention, there is an oil receiving part on the front face of the ventilation fan cover, the oil receiving part can be easily confirmed, and it is easy to wipe from the front, and the ventilation fan cover is easily removed and cleaned. Since the upper edge of the oil receiver forms a chamfered portion, the oil and water droplets are guided to the oil receiver to prevent the oil and water drops from falling indoors, and the chamfer It is easy to see the oil and water collected inside the receiving part. Furthermore, since the shape of the ventilation fan cover is not complicated, a ventilation fan with good productivity can be obtained without impairing the basic characteristics of the ventilation fan.

It is the disassembled perspective view seen from the room inner side diagonal upper part which shows the external appearance of the ventilation fan which concerns on Embodiment 1 of this invention. It is the schematic which looked at the main body frame upper part of the ventilation fan which concerns on Embodiment 1 of this invention from the indoor side front. It is a perspective view which shows the external appearance of the ventilation fan cover which concerns on Embodiment 1 of this invention. It is a sectional side view of the ventilation fan main body which concerns on Embodiment 1 of this invention, It is the elements on larger scale which expanded the cover and oil receiving part of the sectional side view of the ventilation fan main body of FIG.

  Hereinafter, embodiments of a ventilation fan according to the present invention will be described in detail with reference to the drawings.

Embodiment 1 FIG.
First, the ventilation fan according to the present invention will be described. FIG. 1 is an exploded perspective view showing the exterior of a ventilating fan according to Embodiment 1 of the present invention, as viewed from obliquely upward on the indoor side.

As shown in FIG. 1, the ventilation fan 10 includes a main body frame 1, a fixed foot 11 and a fixed foot 12 provided on the main body frame 1, and an electric motor 2 supported by the fixed foot 11 and the fixed foot 12.
In the ventilation fan 10, a ventilation fan cover 3 is provided on the main body frame 1, an axial flow type blade 4 is attached to the shaft of the electric motor 2, and a spinner 5 is attached to the center of the blade 4. The blower of the ventilation fan 10 blows air by rotating the blades 4 with the electric motor 2.

The ventilation fan cover 3 is formed of a synthetic resin or the like and forms a wind tunnel, and is detachable from the main body frame 1. For this reason, it is possible to remove only the ventilation fan cover 3 without removing the main body frame 1, and it is easy to perform cleaning.
Note that there are some ventilation fan covers 3 to which, for example, filters, mesh guards, and the like are attached depending on applications.
In addition, the ventilation fan 10 is installed in a wall hole or the like formed in a wall of a house and the air flow between the indoor air and the outdoor air by rotating the blades 4 as described above. To ventilate the room.

The main body frame 1 is formed of a metal frame in which ends in a short direction of a substantially rectangular metal steel plate having strength to support the entire ventilation fan 10 are connected to each other. The main body frame 1 has an opening on the indoor side and the outdoor side.
In the above description, an example in which the main body frame 1 is formed of a metal frame connected by a substantially rectangular metal steel plate has been described. However, the present invention is not particularly limited thereto. For example, the shape may be circular, and the material may be formed of synthetic resin or the like.

  The fixed legs 11 and 12 that support the electric motor 2 ensure the strength by bending the metal steel plate into a C-shaped section. Further, the fixed legs 11 and 12 are formed in a substantially straight shape, and are connected by screws or caulking in the longitudinal direction between the upper surface portion and the lower surface portion of the main body frame 1. By connecting the fixed legs 11 and 12 in the longitudinal direction of the main body frame 1 in this manner, the strength is improved so that the twist or inclination during the installation of the main body frame 1 is not deformed. Further, by increasing the strength of the main body frame 1 and the fixed legs 11 and 12, even if vibration or noise is generated from the electric motor 2 or the blades 4, it is prevented from being transmitted.

An upper flange portion 13 is provided at the upper edge portion of the main body frame 1, a left flange portion 14 is provided at the left edge portion of the main body frame 1, and a right flange portion 15 is provided at the right edge portion of the main body frame 1. A lower flange portion 16 is provided at the lower edge portion of the main body frame 1. The upper flange portion 13, the left flange portion 14, the right flange portion 15, and the lower flange portion 16 are formed by bending a metal steel plate into an L-shaped cross section and being attached to each edge of the main body frame 1.
The upper flange portion 13, the left flange portion 14, the right flange portion 15, and the lower flange 16 are formed with holes for attaching various mounting brackets and the like.

  The electric motor 2 is constituted by, for example, a capacitor starting AC motor, and although not shown, when a power source is energized, an internal coil generates a rotating magnetic field and rotates the rotor. The rotor has a shaft inserted in the center, and rotates the fan 4 attached to the shaft. The electric motor 2 is securely fixed to the fixing legs 11 and 12 of the main body frame 1 with screws or the like. The blades 4 are formed so as to be detachable from the shaft, and maintenance such as cleaning can be easily performed without removing the main body frame 1 and the ventilation fan cover 3 in a state where the ventilation fan 10 is installed.

The blade 4 uses an axial flow type propeller blade so that a large air volume can be obtained. Although attachment of the blade | wing 4 is not shown in figure, the thread part is formed in the shaft tip of the electric motor 2, for example, and the nut is provided in the center part of the spinner 5. FIG. Therefore, the blade 4 can be fixed to the shaft by tightening the spinner 5. The spinner 5 is tightened in the direction opposite to the direction in which the blade 4 rotates, and the rotation of the blade 4 prevents the spinner 5 from loosening. Thus, by making the blade 4 detachable, the blade 4 can be easily attached and detached, and only the blade 4 can be removed and cleaned.

An opening is formed on the outdoor side of the main body frame 1, and a plurality of shutter plates 6 made of a metal steel plate are provided in the opening.
Although the details will be described later, the plurality of shutter plates 6 are provided so as to be interlocked with the switch unit 8 via the shutter connecting plate 7. Providing the shutter in this way has the effect of reducing the intrusion of outside air from the outside of the room when the ventilation fan is stopped, and shielding the sound and light between the outside and the room.

  The switch unit 8 is provided at the lower left corner of the front surface of the main body frame 1 and is connected to a lead wire 8c led out from the electric motor 2 and includes a power cable 8a having a plug at the tip and a drawstring 8b. The switch unit 8 switches the physical connection state between the power cable 8a and the lead wire 8c alternately between a conductive state and a disconnected state that is a non-conductive state in response to the pull string 8b being pulled. Thus, it is controlled whether or not the power supplied from the plug inserted into the outlet is supplied.

The switch unit 8 controls the plurality of shutter plates 6 to be opened via the shutter connecting plate 7 when in the conductive state, and the plurality of shutter plates 6 via the shutter connecting plate 7 when in the power-off state. Is controlled to be closed. That is, according to the pull string 8b being pulled, the plurality of shutter plates 6 are configured to be alternately switched between an open state and a closed state. In the shutter closed state, the shutter closed state is maintained so that the shutter does not vibrate due to the outside wind.
In the above description, the opening and closing of the shutter plate 6 has been described as switching between the open state and the closed state in conjunction with the drawstring 8b. However, the shutter plate 6 is electrically operated by a small motor or the like, or the wind pressure of the blades 4 is used. There is also an open wind pressure type. Moreover, although the shutter 6 demonstrated the example formed from a metal steel plate, for example, a material may be formed with a synthetic resin etc.

Next, installation on the wall etc. of the ventilation fan 10 is demonstrated.
FIG. 2 is a schematic view of the upper part of the main body frame of the ventilation fan according to the first embodiment of the present invention as viewed from the indoor front side.
As shown in FIG. 2, a mounting piece 17 and a fan bolt 18 are provided on the upper surface portion 1 a that forms the upper surface of the main body frame 1. The mounting piece 17 has a threaded hole, and the fan bolt 18 is provided in the mounting piece 17 in a state of being screwed into the threaded hole of the mounting piece 17.

  The fan bolt 18 is used when the ventilation fan 1 is installed. This is because the mounting fan tightens the fan bolt 18 on the surface of the wall hole, so that the ventilation fan 1 is installed in a wall hole or the like (not shown). A wooden frame is usually inserted into the wall hole, and the fan bolt 18 is firmly fixed to the wooden frame to fix the main frame 1 to the wall. Since it is tightened with the fan bolt 18, no special tool is required, and the ventilation fan 10 can be easily installed.

Next, the oil receiver of the present invention will be described in detail with reference to the drawings.
FIG. 3 is a perspective view showing an appearance of the ventilation fan cover according to Embodiment 1 of the present invention. FIG. 4 is a side cross-sectional view of the ventilation fan body according to Embodiment 1 of the present invention. FIG. 5 is a partially enlarged view in which the oil receiving portion of FIG. 4 is enlarged.

  As shown in FIG. 3, the ventilation fan cover 3 is formed in a box shape by a flat front portion 33 and a periphery thereof by a frame portion 35. By forming the ventilation fan cover 3 in a box shape, strength is ensured and vibration is not generated. A ventilation hole 34 is provided in the center of the ventilation fan cover 3, and an air tunnel 31 is formed around the ventilation hole 34. This wind tunnel 31 covers the periphery of the blade 4. The ventilation fan cover 3 is detachably provided on the indoor side (air inflow side) of the main body frame 1 and is fixed to the upper flange 13 and the lower flange 16 of the main body frame. By providing the ventilation fan cover 3 so as to be detachable from the main body frame 1, the ventilation fan cover 3 which is easily soiled can be removed and cleaned, and the cleaning property is good. Further, the ventilation fan cover 3 covers the main body frame 1 to improve the interior design.

As shown in FIG. 4, the depth of the wind tunnel 31 is adjusted to be substantially the same as the depth of the blade 4 from the indoor side, and the wind between the outer edge of the blade 4 and the inner surface of the main body frame 1 is blocked. It is made to flow. Further, the front side 33 of the ventilation fan cover 3 and the indoor side of the wind tunnel 31 form a suction port 31a that is smoothly connected by increasing its diameter. By forming the suction port 31a in the wind tunnel 31 in this way, the air volume obtained by the blades 4 is as large as possible, and the noise is minimized.

  As shown in FIGS. 4 and 5, an oil receiving portion 32 having a concave cross section is integrally provided below the front portion 33 of the ventilation fan cover 3. The oil receiving portion 32 is a rectangular depression, and is provided so that the oil droplet 100 and the water droplet 101 attached to the wind tunnel 31 and the suction port 31a do not drip into the indoor side. The oil receiving portion 32 is provided horizontally below the suction port 31a. Thus, by providing it integrally with the ventilation fan cover, it is easy to check the accumulation state of the oil droplet 100 and the water droplet 101, and the visibility is good, and by providing the front portion 33, the cleaning property is also good. Further, since the oil droplet 100 and the water droplet 101 do not flow down below the oil receiving portion 32 because they are horizontally below the suction port 31a.

Next, the mechanism in which the oil droplet 100 and the water droplet 101 are collected by the oil receiving part 13 provided with the orifice 5 will be described. Oil and water contained in the exhausted smoke and water vapor are contained in the exhausted air. For this reason, oil and water adhere to locations where the exhausted air mainly collides. Therefore, it tends to adhere mainly to the suction port 31 a or the blade 4. The oil and water adhering to the blades 4 are scattered by the rotating centrifugal force, adhere to the suction port 31a, and further grow into oil droplets 100 and water droplets 101. The upper edge of the oil receiving portion 32 is connected to the front portion 33 and the chamfered portion 32 a of the ventilation fan cover 3, and the oil droplet 100 and the water droplet 101 that hang down from the air tunnel 31 and the suction port 31 a are disposed inside the oil receiving portion 32. To be able to guide to. As shown in FIG. 4, the oil droplet 100 and the water droplet 101 flow downward due to gravity and try to drop. By forming the chamfered portion 32 a on the upper portion of the oil receiving portion 32, the oil droplet 100 a and the water droplet 101 a are collected by the oil receiving portion 32 through the chamfered portion 32 a due to the Coanda effect. Furthermore, the inside of the oil receiving portion 32 can be confirmed by the chamfered portion 32a, and the visibility is improved.

  The width l of the oil receiving portion 32 is smaller than the diameter L of the suction port 31a. This is because the oil droplet 100 and the water droplet 101 adhering to the suction port 31a are collected at the lowest position of the suction port 31a, that is, a part close to the center by its own weight. Therefore, the width of the oil receiving portion 32 can be made compact, and further, the strength of the ventilation fan cover 3 is not reduced. In addition, the height h of the oil receiving portion 32 is about 10 mm or more and is large enough for a finger to enter. By doing in this way, it is easy to wipe off the oil droplet 100 and the water droplet 101 collected in the oil receiving part 32, and the width is compact and easy to wipe off.

  On the lower side of the oil receiving portion, there is provided an inclined portion 32b that is inclined downward to the main body frame 1 side. By providing the inclined portion 32b, the oil droplet 100 and the water droplet 101 held by the oil receiving portion 32 do not overflow, and the holding amount can be improved. Further, when the ventilation fan 10 is installed, even if the ventilation fan 10 is installed with a slight inclination from the inclination of a wall, a wooden frame or the like, the oil droplet 100 and the water droplet 101 are prevented from dripping indoors. Furthermore, since it can be wiped by placing a finger on the inclined portion 32b, it is easy to clean and can be easily wiped without applying excessive force to the finger.

  The blades 4 are located outside the front portion 33 of the ventilation fan cover 3. Further, the tip 4 a of the blade 4 is located on the outdoor side of the front portion 33. By doing in this way, it can prevent that the oil and water adhering to the blade | wing 4 scatter to the indoor side. Further, by forming the front portion 33 of the ventilation fan cover 3 in a flat surface, it is possible to prevent the deterioration of the characteristics of the ventilation fan without disturbing the suction of the wind.

  As described above, the ventilation fan according to the present invention can suppress the fall of oil droplets and water drops and wall contamination by providing the oil receiving portion, and can also improve the cleanability of the oil receiving portion and the structure is simple. This is useful.

  1 Body frame, 2 motor, 3 ventilation fan cover, 4 blades, 4a blade tip, 5 spinner, 6 shutter, 7 shutter connecting plate, 8 switch, 8a power cord, 8b drawstring, 8c lead wire, 10 ventilation fan, 31 wind tunnel, 31a Suction port, 32 Oil receiving part, 32a Chamfered part, 32b Inclined part, 33 Front part, 34 Vent hole, 35 Frame, 50 Wall, 100 oil drop, 101 water drop

Claims (6)

A box-shaped body frame that opens the indoor side and the outdoor side to form an air passage;
A blower having an electric motor and blades and provided in the main body frame;
The ventilation fan cover that covers the indoor side of the main body frame and the ventilation fan cover are provided with an air suction port on the front surface so as to be detachable from the main body frame,
The ventilation fan according to claim 1, wherein the oil receiving portion and the oil receiving portion provided below the suction port are formed in a concave cross section, and a chamfered portion is formed on an upper edge of the concave shape.   The ventilation fan according to claim 1, wherein the oil receiving portion is formed at a height where a finger can enter.   The ventilation fan according to claim 1, wherein the oil receiving portion is formed with an inclined portion so that the height of the concave lower side portion decreases from the indoor side toward the outdoor side. The ventilation fan according to any one of claims 1 to 3, wherein both ends of the width of the oil receiving portion are located inside the outer diameter of the suction port. The ventilation fan according to any one of claims 1 to 4, wherein a front side of the indoor side of the ventilation fan cover is substantially flat.   The ventilation fan according to claim 1, wherein a tip of the blade is positioned on an outdoor side from a front surface of the ventilation fan cover.

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