JPH0544971A - Ventilating fan - Google Patents

Abstract

(57) [Summary] [Purpose] In a ventilation fan equipped with blowers for air supply and exhaust, the above blowers are covered with a casing made of foamed resin to improve the adhesion between the casing and the inner wall of the ventilation fan, and to prevent air leakage. Prevent. [Structure] In a foamed resin casing 14 provided with a supply / exhaust suction port 15 and a casing rising portion 16 of a predetermined shape, which is in close contact with the main body casing of the ventilation fan at the casing rising portion 16, the casing rising portion 16 is thin. The ribs 19 are formed so as to project. [Effects] Since the ribs enhance the close contact with the main body casing, a casing that prevents air leakage and can stably and maintain the blowing performance can be obtained easily and at low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation fan having a casing made of foamed resin.

[0002]

2. Description of the Related Art Conventionally, as a ventilation fan of this type, FIG.
As shown in FIG. 3, a foamed resin casing 1 is integrally formed with a partition 2 for air supply and exhaust and a suction port 3 corresponding to air supply and exhaust, and this casing 1 is combined with a main body casing (not shown) and is not shown. It is known that a ventilation fan is formed between the air supply side and exhaust side blowers (see, for example, Japanese Utility Model Laid-Open No. 61-192239).

[0003]

In the conventional ventilation fan as described above, when the main body casing and the foamed resin casing 1 are combined, the dimensional accuracy of the casing 1 is improved so as not to leak the supply air and the exhaust air. Alternatively, a packing (not shown) made of a flexible material made of a synthetic resin to seal the gap is attached to the casing 1 and the main body casing, and the assemblability and manufacturability are poor, and the manufacturing cost is increased. It was

The present invention has been made in order to solve the above-mentioned problems, and a ventilation fan which can surely combine a main body casing and a foamed resin casing, has no air leakage from the combined portion, and can be manufactured easily and inexpensively. The purpose is to obtain.

[0005]

A ventilation fan according to the present invention includes a main body casing formed of a box, a blower installed in the main body casing, and an end portion covering the blower, the end portion being in contact with the main body casing. A foamed resin casing that prevents leakage of an air flow from a blower is provided, and a thin rib is projectingly provided on an abutting surface of an end portion of the foamed resin casing.

In addition, a soft portion having a light specific gravity is continuously provided on the contact surface of the end portion of the foamed resin casing.

[0007]

According to the present invention, the main body casing formed of a box, the blower installed in the main body casing, and the end portion which covers the blower is brought into contact with the main body casing,
A foamed resin casing that prevents leakage of airflow from the blower is provided, and a contact surface of the foamed resin casing is formed by projecting a thin rib on the contact surface of the end portion of the foamed resin casing. The rib is bent by bringing it into contact with the main body casing and pressing it, and the rib is brought into close contact with the main body casing.

Further, since a soft portion having a light specific gravity is continuously provided on the contact surface of the end portion of the foamed resin casing, the contact surface of the foamed resin casing is brought into contact with the main body casing,
By pressing, the soft portion is brought into close contact with the main body casing.

[0009]

【Example】

Example 1. 1 to 6 are views showing Embodiment 1 of the present invention, in which 5 is a ventilation fan, and 6 is a main body casing forming an outer casing of the ventilation fan, which is a box body. Reference numerals 7 and 8 denote air supply / exhaust ports provided on the opposite side walls 9 of the main body casing, and 10 and 11 are air supply blowers and exhaust air blowers located between these air supply / exhaust ports. And an electric motor 13, and they are arranged in a line so as to face the inner wall of the main body casing 6. Reference numeral 14 denotes a foamed resin casing, which has a pair of suction ports 15 facing the respective impellers 12 of the air supply blower 10 and the exhaust blower 11, and a casing rising portion 16 having a ventilation port 17 surrounding the suction ports 15. Are provided in a predetermined shape while being provided.
The casing rising portion is also continuous with the peripheral end of the foamed resin casing 14, and the casing rising portion 16
An abutment surface 1 in which the whole is abutted against the inner wall of the main body casing 6
By being abutted via 8, the air supply / exhaust blowers 10 and 11 are connected to the main body casing 6 so as to cover them. Reference numeral 19 denotes a rib projecting from the contact surface 18 of the rising portion of the casing, which is thin and has a predetermined thickness with respect to the area of the contact surface 18 as shown in FIGS. Two
Reference numeral 0 denotes a partition portion projectingly provided at the center of the back portion of the foamed resin casing 14 and serves as a partition between the air supply passage and the exhaust passage.

In the ventilation fan constructed as described above,
As an assembly, the air supply blower 10 and the exhaust air blower 11 are attached to the main body casing 6, and the air supply and exhaust air blower 10,
The foam resin casing 14 is fitted to the main body casing 6 so as to cover 11, and the ribs 19 are deformed by the contact surface 18 being brought into contact with the inner wall of the main body casing 6 to form a gap in the inner wall of the main body casing 6. It is adhered without making. Then, the blowers 10 and 11 are operated to supply and exhaust air from the air supply ports 7 and 7 to the exhaust ports 8 and 8.

Embodiment 2. Further, as shown in FIG. 7 and FIG. 8, a soft portion 30 having a high specific expansion ratio of 60 to 80 times the normal expansion ratio of 20 to 30 times and having a light specific gravity is provided on the contact surface 18 of the casing rising portion 16. The same effect as that of the first embodiment can be obtained by forming one or two steps.

Embodiment 3. Further, as shown in FIG. 9, by providing the soft ribs 31 integrally with the soft portion 30, the adhesion between the main body casing 6 and the foamed resin casing 14 can be further enhanced.

Embodiment 4. Further, as shown in FIG. 10, a soft rib 31 integrally formed of a high foam by a separate piece and a separate member 41 provided with a fitting recess 40 for the rib 19 are provided on the casing rising portion 16 provided with the rib 19. By fitting, the separate member 41 can be arbitrarily used according to the product, and the usability is further improved.

[0014]

As described above, according to the present invention, a main body casing formed of a box, a blower installed in the main body casing, and an end portion which covers the blower is brought into contact with the main body casing to prevent the blower from the blower. With a foamed resin casing that prevents leakage of airflow, by providing a thin rib on the contact surface of the end portion of the foamed resin casing,
The main body casing and the foamed resin casing are joined to each other by the ribs on the abutting surface to improve the adhesiveness, prevent air leakage from the blower, and obtain a highly accurate casing at low cost.

Further, since the soft portion having a light specific gravity is continuously provided on the contact surface of the end portion of the foamed resin casing, the adhesion between the main body casing and the foamed resin casing is improved at the soft portion. It is possible to prevent air leakage from the blower with low cost and simple structure.

[Brief description of drawings]

1 shows Embodiment 1 of the present invention, in which a is a plan view of a ventilation fan and b is a side view.

FIG. 2 is a plan view of the main body casing showing the first embodiment of the present invention.

FIG. 3 is a plan view of a foam resin casing showing Embodiment 1 of the present invention.

FIG. 4 is a front view of a foamed resin casing showing Embodiment 1 of the present invention.

5 shows the first embodiment of the present invention and is taken along the line AA in FIG.
Is.

FIG. 6 is a sectional view of a round rib according to the first embodiment of the present invention.

FIG. 7 is a front view of a foamed resin casing showing a second embodiment of the present invention.

8 shows a second embodiment of the present invention, which is a cross section taken along the line BB in FIG.
Is.

FIG. 9 is a cross-sectional view of a casing rising portion showing Embodiment 3 of the present invention.

FIG. 10 is a sectional view of a casing rising portion showing Embodiment 4 of the present invention.

FIG. 11 is a front view of a foam resin casing of a conventional ventilation fan.

[Explanation of symbols]

 5 Ventilation fan 6 Main body casing 10 Air supply blower 11 Exhaust air blower 14 Foam resin casing 18 Contact surface 19 Rib 30 Soft part

Claims (2)

[Claims] 1. A main body casing formed of a box, a blower installed in the main body casing, and an end portion which covers the blower and abuts against the main body casing to prevent foaming of air flow from the blower. With a resin casing,
A ventilating fan, characterized in that a thin rib is provided on an abutting surface of an end portion of the foamed resin casing. 2. The ventilation fan according to claim 1, wherein a soft portion having a light specific gravity is continuously provided on the contact surface of the end portion of the foamed resin casing.