JP2509675B2 - Ventilation fan for duct - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention relates to a ventilation fan for a duct installed on a ceiling of a bathroom or the like, and more particularly to a structure in which dew condensation water is prevented from leaking.

(Prior Art) A ventilation fan for a duct is attached to a ceiling or a wall surface in a room to ventilate the room. However, the ventilation fan itself is often exposed to outside air (cold air in the ceiling) and has a low temperature. When warm air in the room is exhausted, dew condensation occurs in the frame of the ventilation fan main body, and particularly when it is installed on the ceiling of the bathroom, a large amount of dew condensation occurs, and the dew condensation water leaks from the ventilation fan and drips.

As a method of eliminating this inconvenience, a structure has conventionally been proposed in which a grill that also serves as a tray for condensed water is attached to the intake port of the main body of the ventilation fan that opens to the inside (Japanese Patent Publication No. 54-3255).
No. 0). This structure has no problem when the amount of condensed water is small, but when a large amount of condensed water is generated, there is a problem that the condensed water overflows from the edge of the grill and drops into the room.

Further, a structure has been proposed in which the frame of the ventilation fan main body is covered with a heat insulating material to prevent dew condensation (Japanese Utility Model Publication No. 55-20067).
Since the heat insulating material is on the outside of the main body frame, the external dimensions of the ventilation fan become large, which makes it inconvenient to install in a narrow space such as the ceiling.

(Problems to be Solved by the Invention) As described above, in the conventional structure, the former one is insufficient in treating the dew condensation water generated in the main body frame, and the latter one is disadvantageous in that the outer dimension is large. There is.

The present invention has been made in view of the above circumstances, and provides a ventilation fan for a duct that can be removed without causing leakage of condensed water in the ventilation fan without leaking from the ventilation fan.

[Structure of the Invention] (Means for Solving the Problem) A first invention is a container-shaped main body frame having an intake port and an exhaust port and attached to a ceiling, and provided in the main body frame.
In a duct ventilation fan comprising a casing that forms a ventilation path from the intake port to the exhaust port, and a blade arranged in the casing, a surface of the main body frame or the inside of the main body frame itself is made of a water absorbent member. It is a ventilation fan for ducts characterized by being formed.

A second aspect of the present invention is the duct ventilation fan according to the first aspect of the present invention, in which the casing is formed of a water absorbing member.

A third invention is a container-shaped main body frame having an intake port and an exhaust port and attached to a ceiling, a casing provided in the main body frame and forming a ventilation path from the intake port to the exhaust port, and the casing. In a ventilation fan for a duct, comprising: a vane disposed inside; and a dish-shaped grill with a bottom that is provided so as to cover an intake port portion of the main body frame, wherein the casing is formed of a water-absorbing member. The casing is characterized in that a tongue portion made of a water absorbing member is extended so as to reach the inside of the grill. Located on a duct ventilation fan.

(Operation) In the first invention, by forming the container-shaped main body frame itself or the inner surface of the main body frame with a water-absorbing member, even if dew condensation occurs inside the main body frame, it is absorbed by the water-absorbing member. Moreover, the absorbed dew condensation water is evaporated by the exhaust flow passing through the main body frame and is sent out from the exhaust port toward the duct, so that the dew condensation water does not collect in the ventilation fan.

In the second invention, in addition to the first invention, the casing for accommodating the blades is also formed of the water absorbent member, so that the dew condensation water generated in the casing is immediately absorbed, and the absorbed dew condensation water is provided in the ventilation path. It is vaporized by the exhaust flow passing through (in the casing). Therefore, even if dew condensation occurs on the casing, dew condensation water does not collect.

According to a third aspect of the present invention, a grill attached to cover the intake port of the main body frame is formed in a dish shape having a non-perforated bottom for receiving dew condensation water, and is extended from a casing formed of a water absorbing member in the grill. By arranging the lower end of the tongue made of the water absorbing member, the condensed water collected in the grill is sucked up from the tongue, permeated into the casing, and evaporated. Therefore, the condensed water accumulated in the grill is automatically removed.

(Example) Hereinafter, an example of a ventilation fan for a duct according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing a first embodiment of a duct ventilation fan according to the present invention.

That is, 1 is a duct ventilation fan, and its container-shaped body frame 2
Is attached to the opening of the ceiling 3, and the main body frame 2 itself is formed of a water-absorbing member called a so-called high water-absorbent resin or polymer absorber, and has an intake port 4 and an exhaust port 5. A casing 14 is provided in the body frame 2 so as to form a ventilation path from the intake port 4 to the exhaust port 5. Further, a convex portion 8 is formed on the upper portion 7 of the main body frame 2, and a mounting plate 9 to which the motor 11 for driving the blades 13 is housed so that the motor 11 for driving the blade 13 is housed in the inner space thereof is fixed by a screw 10 to the main body. It is fixed to the frame 2.

The blades 13 are rotatably attached to the rotary shaft 12 of the motor 11 and are in the ventilation passage in the casing 14 and have an exhaust function.

Therefore, such a duct ventilation fan 1 is attached to a ceiling plate 3 of a bathroom or the like as shown in the drawing, and the rotation of the blades 13 sucks steam or the like that is trapped in the bathroom through the intake port 4 and the suction portion 15 of the casing 14. , Is discharged from the exhaust port 5 to the duct 6 via the connecting member 16.

A dish-shaped grill 18 as a decorative plate is attached to the outside of the intake port 4 so as to cover the intake port.
A plurality of vent holes 18a are provided at the bottom of the base 18. Also,
In the connection member 16, a shutter 17 for preventing the intake of wind from the outside when the ventilation fan is stopped is rotatably attached.

Since the duct ventilation fan 1 according to the present invention has the above-described configuration and the main body frame 2 itself is formed of the water-absorbing member, dew condensation that occurs on almost the entire inner surface of the main body frame due to the temperature difference between the inside and the outside of the main body frame 2 itself. It is absorbed and dripping to the grill 18 or bathroom is suppressed. Further, the moisture once absorbed in the main body frame 2 is promoted to be evaporated by the air blowing action (exhaust flow) by the blades 13, and the moisture is diffused.

Although various concrete water-absorbing members of the main body frame 2 are conceivable, for example, "Sunfine" which is made of a hydrophilic plastic porous body and is lightweight and has necessary mechanical strength.
AQ ”(brand name, manufactured by Asahi Kasei KK) can be used.

As described above, in the duct ventilation fan of the present invention, even if dew condensation occurs in the ventilation fan (substantially the entire inner surface of the main body frame) due to the temperature difference between the inside and outside of the duct, the condensed water is quickly transferred to the main body frame made of the water absorbing member. It is not absorbed into the inner surface of the main body frame, and therefore the inner surface of the main body frame is not contaminated by dew condensation water, and it is prevented from dripping into the room. To be

In the first embodiment shown in FIG. 1, the main frame 2 itself is made of a water absorbent member, but the main frame 2 and the casing 14 itself or a part thereof are also provided with a water absorbent member. With this structure, it is possible to further obtain the effect of preventing the dew condensation water from dropping.

FIG. 2 is a sectional view showing a second embodiment of the duct ventilation fan according to the present invention. The same components as those shown in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted.

That is, also in the duct ventilation fan according to this embodiment, as shown in FIG. 2, the vanes 13 are provided in the casing 14, and the rotational force of the vanes 13 causes the air in the room to be sucked into the intake port 4 and the suction portion.
It acts to inhale through 15 and deliver it from the exhaust port 5 to the duct 6.

Therefore, in this embodiment, the intake port 4 and the exhaust port 5 are
The container-shaped main body frame 2 provided with is formed of ABS (acrylic-butadiene-styrene) resin, and the main body frame 2
Water absorbent member made of the same material as the first embodiment on the inner surface
It was constructed by attaching 19 pieces.

As a result, the absorbing member 19 has a form forming a part of the main body frame.

Therefore, in this embodiment, the same effect as that of the first embodiment can be obtained by the relatively simple structure in which the water absorbent member 19 is attached and fixed to the inner surface of the main body frame 2 having the same structure as the conventional one by adhesion or the like. In addition to the above, there is an advantage that the dew condensation itself can be suppressed by the heat insulating effect of the water absorbing member 19.

As in FIG. 1, a dish-shaped grill 18 is provided outside the intake port 4, and a shutter 17 is provided inside the connection member 16. In addition to the ABS resin, for example, a steel plate or PP (polypropylene) resin can be used for the body frame 2. Further, in this embodiment as well, the casing 14
By forming itself or a part thereof with a water absorbing member, the effect of preventing dew condensation water dripping can be further enhanced.

FIG. 3 is a sectional view showing a third embodiment of the duct ventilation fan according to the present invention. Also in FIG. 3, the same components as those in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted.

That is, in the duct ventilation fan 1 shown in FIG. 3, the main body frame 2 sends the air from the intake port 4 to the exhaust port 5 through the suction part 15 of the casing 14, as in the case of the one shown in FIG. The configuration is different, but the main differences are the following two points.

The first difference is that the water absorbent member 19 attached to the main body frame 2 is removed, the lower end of the main body frame 2 is slightly extended to provide a drainer 21 to form the intake port 4, and the grill 18 having a plate shape. The ventilation opening 18b is provided on the peripheral side surface at a position slightly higher than the bottom surface, and the bottom is made non-perforated so that the condensed water dripping from the inside of the ventilation fan is collected at the bottom of the grill 18.

The second difference is that the casing 14 itself is made of the same water-absorbing member as described above, and the tongue portion 20 is made of a water-absorbing member that reaches the bottom of the grill 18 so as to suck up the condensed water accumulated in the grill 18. Is extended in a casing 14 in a hanging shape.

As a result, the dew condensation water dripping along the inner surface of the main body frame 2 surely drops into the grill 18 through the guide of the water draining portion 21, and the water accumulated in the grill 18 passes through the tongue portion 20 to the casing 14. Since the water is widely absorbed in, the overflow from the grill 18 is eliminated, and at the same time, the moisture contained in the casing 14 is quickly and effectively diffused by the air blow (exhaust air flow) of the blades 13.

Further, when this embodiment is applied to a bathroom, even if steam adheres to the lower surface of the casing 14 (suction part 15 part), the water content is quickly absorbed by the water absorbing member, so that the dew condensation water is allowed to enter the room. Never drip.

Although FIG. 3 shows the casing 14 itself made of a water-absorbing member, the casing 14 itself may be made of ABS resin, and a separate water-absorbing member may be widely attached to the casing surface for divergence. it can. In this case, the absorbing member has a form forming a part of the casing.

As described above, also in this embodiment, the same effect as the above embodiment can be obtained with a simple structure in which the water absorbent member is formed in the casing and only the tongue is newly provided, and the water accumulated in the grill 18 is obtained. There is an advantage that the troublesome work of removing and removing the grill 18 can be omitted.

Incidentally, in each of the above-described examples, it is needless to say that the moisture absorbed by the water absorbent member can be naturally dried.

[Effects of the Invention] As is clear from the above description, according to the invention of claim 1, even if dew condensation occurs in the ventilation fan (substantially the entire inner surface of the main body frame) due to a temperature difference between the inside and the outside, dew condensation occurs. Water is not quickly absorbed by the main body frame made of absorbent material and does not reach the inner surface of the main body frame. Therefore, it is possible to effectively prevent the inner surface of the main body frame from being contaminated by dew condensation water, and the dew condensation water drops inside the room. There is an effect that it can be surely prevented.

According to the second aspect of the present invention, in addition to the above effects, there is an effect that the generation of dew condensation can be effectively suppressed by the heat insulating effect of the water absorbing member.

According to the third aspect of the present invention, the dew condensation water dripping along the inner surface of the body frame can be surely dropped into the grill, and the water accumulated in the grill is passed through the tongue portion formed of the absorbing member. Similarly, since water can be widely absorbed by the casing made of a water-absorbing member, there is no fear of overflow from the grill, and it is possible to reliably prevent the dew condensation water from dripping into the room.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 3 are sectional views showing first to third embodiments of a duct ventilation fan according to the present invention. 2 ... Main frame, 4 ... Intake port 5 ... Exhaust port, 18 ... Grill 13 ... Blades, 14 ... Casing 19 ... Water absorbing member, 20 ... Tongue

Claims (3)

(57) [Claims] 1. A container-shaped main body frame having an intake port and an exhaust port, which is attached to a ceiling, a casing provided in the main body frame and forming a ventilation path from the intake port to the exhaust port, and the inside of the casing. A fan for a duct, comprising: a vane arranged on the inner surface of the main body frame itself or an inner surface of the main body frame formed of a water absorbent member. 2. The duct ventilation fan according to claim 1, wherein the casing is formed of a water absorbent member. 3. A container-shaped main frame having an intake port and an exhaust port, which is attached to a ceiling, a casing provided in the main frame to form a ventilation path from the intake port to the exhaust port, and the inside of the casing. In a ventilation fan for a duct, comprising: a vane arranged in the above, and a dish-shaped grill whose bottom portion is provided so as to cover the intake port portion of the main body frame, while forming the casing with a water-absorbing member, A ventilation fan for a duct, characterized in that a tongue portion made of a water absorbing member is extended to the casing so as to reach the inside of the grill.