JPH0332918Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a ventilation fan, such as a pipe ventilation fan, that is fitted into a ventilation opening and used for ventilation.

[Prior Art] A conventional ventilation fan of this kind described above has a configuration as shown in FIG. 3, for example. That is, a leaf spring 15 is attached to the outside of the pipe 1 forming the ventilation hole.
A cylindrical body frame 16 that is fitted and fixed by the expansion spring force of
An exhaust blower 17 consisting of a motor and a fan is installed inside the main body frame 16, and a removable grill 18 is attached to the end of the main body frame 16 on the exhaust flow suction side.

This ventilation fan only exhausts air and does not have an intake function to bring in fresh air. A 1975 commercial model with both intake and exhaust functions to take in fresh air.
There are also ventilation fans as disclosed in Publication No. 147452. In this type of device, a ventilation passage for exhaust and an intake passage are formed in the main body frame, and intake and exhaust are performed simultaneously by a blower installed in one of the ventilation passages. .

[Problems to be solved by the invention] In the above-mentioned conventional ventilation fans, those that can only exhaust air but cannot take in air are difficult to achieve rapid ventilation, and those that can simultaneously take in and exhaust air have a ventilation path. In many cases, the body frame has a structure that includes a large amount of space, so there are problems such as the strength of the body frame is low.

This idea was made to solve the problems of the conventional method, and allows air intake and exhaust to be carried out at the same time.
The purpose is to obtain a ventilation fan that can maintain high strength of the main body frame.

[Means for Solving the Problems] The ventilation fan according to this invention has a cylindrical body frame that is open at both ends and has double internal and external ventilation passages, and an inner cylinder that forms the ventilation passage inside the main body frame. An exhaust blower consisting of a fan and a motor is attached to the outer surface of the outer cylinder, which forms a ventilation path, through a mounting leg inside, for fixing the body frame to the ventilation opening in a fitted state. An elastic member is provided respectively, and a grille having ventilation holes which are separated from each other and corresponds to the dual internal and external ventilation channels is removably attached to one end of the main body frame, and is fixed to the mounting leg. A spacer is sandwiched between the outer cylinder and the inner cylinder, and the elastic members are fastened together with screws screwed in from the outside of the outer cylinder.

[Function] In this invention, the mounting leg for mounting the blower motor and the fixing elastic member are fastened together by a screw inserted from the outside of the outer cylinder with a spacer sandwiched between the outer cylinder and the inner cylinder. Therefore, the members can be connected to each other with a small number of parts, and the strength of the main body frame is improved.

[Embodiment] FIGS. 1 and 2 both show a ventilation fan as an embodiment of the present invention. This ventilation fan has a motor and a fan installed inside a cylindrical body frame 3 that is fitted and fixed by the expansion spring force of a leaf spring 2 as a fixing elastic member attached to the outside of a pipe 1 forming a ventilation opening. Install the blower 4 for exhaust,
A removable grille 5 is attached to the exhaust flow suction side end of the main body frame 3, which is called a pipe type. The main body frame 3 is a cylindrical body with double internal and external ventilation channels with both ends open, and an exhaust system consisting of a fan and a motor is installed in an inner cylinder 7 forming an internal ventilation channel 6 via a mounting leg 8. A leaf spring 2 for holding the body frame 3 in a fitted state with the ventilation opening is attached to the outer surface of the outer cylinder 10 forming the ventilation passage 9 on the outside thereof.
are provided for each. A ventilation hole 1 is provided at one end of the main body frame 3 and is separated from each other by a partition wall 11, which corresponds to the double internal and external ventilation passages 6 and 9, respectively.
A grill 5 having a number 2 is removably attached with screws. The mounting leg 8 and the leaf spring 2 are constructed by inserting several sleeve-shaped spacers 13 between the outer cylinder 10 and the inner cylinder 7, and using a screw 14 screwed in from the outside of the outer cylinder.
They are fastened together and fixed. Blower 4
The motor is screwed to the mounting leg 8 at several locations and fixed on the center line of the inner cylinder 7.
The end of the inner cylinder 7 on the side of the main body frame 3 on which the grill 5 is not attached is longer than the end of the outer cylinder 10 and expands outward in a truss shape and protrudes. Ventilation hole 12 of grill 5
Among them, those corresponding to the outside ventilation passages 9 are opened across the front and side surfaces of the grill 5.

Therefore, the ventilation fan of this example can suck air to be exhausted from the ventilation hole 12 at the center of the front surface of the grille 5 by operating the blower 4 and exhaust it through the inside ventilation path 6. Fresh air can be supplied through the ventilation holes 12 on the front and sides of the grill 5. Regarding the intake of air through the outer ventilation passage 9, since the inner cylinder 7 is longer than the end of the outer cylinder 10 and protrudes outward in a flared shape, the exhaust air is sucked into the outside ventilation passage 9 and returned. There will be no inconvenience caused.

In addition, the main body frame 3, which is made up of an inner cylinder 7 and an outer cylinder 10 and has many spaces and is low in strength, is connected with the mounting legs 8, leaf springs 2, and spacers 13 with screws 14, so it has high strength. The number of parts to be installed can also be reduced.

[Effects of the invention] As is clear from the above description of the embodiments, the ventilation fan of the present invention has a cylindrical main body frame that is open at both ends and has double internal and external ventilation passages, and an inner ventilation passage. An exhaust blower consisting of a fan and a motor is mounted inside the inner cylinder through the mounting legs, and the main body frame is fitted into the ventilation hole on the outer surface of the outer cylinder that forms the ventilation path outside. A fixing elastic member is provided for holding the main body frame, and a grille is removably attached to one end of the main body frame, and the grille has ventilation holes that are separated from each other and correspond to the dual internal and external ventilation passages. Since the mounting leg and the fixing elastic member are fixed together by sandwiching a spacer between the outer cylinder and the inner cylinder and tightening them with screws screwed in from the outside of the outer cylinder, ventilation through intake and exhaust is prevented. is possible,
It is possible to connect members to each other with fewer parts and improve the strength of the main body frame.

[Brief explanation of the drawing]

FIG. 1 is a vertical side view showing the configuration of a ventilation fan as an embodiment of the present invention, FIG. 2 is a perspective view showing only the mounting legs thereof, and FIG. 3 is a vertical side view showing a conventional example. In the figure, 2 is a leaf spring, 3 is a main body frame, 4 is a blower, 5 is a grill, 6 and 9 are ventilation channels, 7 is an inner cylinder,
8 is a mounting leg, 10 is an outer cylinder, 13 is a spacer, 14
is a screw. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims for Utility Model Registration] (1) A cylindrical body frame with double internal and external ventilation channels open at both ends has mounting legs inserted into the inner cylinder forming the internal ventilation channels. An exhaust blower consisting of a fan and a motor is provided with a fixing elastic member on the outer surface of an outer cylinder forming an outer ventilation passage for holding the main body frame in a fitted state with the ventilation opening, respectively. At one end of the main body frame, a grille is removably attached, which has ventilation holes that are separated from each other and correspond to the double internal and external ventilation passages, and the mounting legs and fixing elastic members are attached. A ventilation fan characterized in that a spacer is sandwiched between an outer cylinder and an inner cylinder, and the outer cylinder is fastened together with screws screwed in from the outside of the outer cylinder. (2) Claim 1 of the utility model registration claim, characterized in that the end of the inner cylinder on the side of the body frame on which the grill is not attached is longer than the outer cylinder and expands outward in a tufted shape. Ventilation fan as described.