JPH03168400A - Fan with silencer box - Google Patents

Abstract

PURPOSE:To reduce the thickness of a fan with silencer so that the fan can be installed on a narrow corner of a ceiling or the like and obtain a free choice of the discharging direction of the fan by installing an impeller to an end of a shaft of a motor, which is arranged within a silencer box with its shaft placed vertically, in such a manner that a suction port of the fan is situated on the motor side. CONSTITUTION:A fan with silencer box is formed with an impeller 1 for a centrifugal fan, a spiral casing 2, a motor 3 at the shaft-end of which the impeller 1 is installed, a silencer box 4 which accommodates all the above items, a suction flange 5 and discharge flange 6, which are provided to a suction port and discharge port, respectively, which are installed on four side surfaces of the silencer box 4, and a blanking plate 7, which closes an unused suction port. The motor 3 is arranged, with its shaft placed vertically and above the motor main body, and at the end of the shaft is installed the impeller 1 with its suction port facing to the motor (3) side. With this construction, the thickness of the product can be reduced. In addition, the direction of the suction or discharge port, which is situated on the side surfaces of the silencer box 4, can freely be chosen out of three types, according to the place of installation of the fan.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a structure for reducing the thickness of a fan with a sound deadening box and for making the discharge direction flexible.

[Conventional technology]

The conventional technology is Mitsubishi Electric Corporation's catalog Mitsubishi ventilation fan,
As stated in the Lossnay General Catalog for Air Conditioning Ventilation Fans, the fan inside the sound deadening box was arranged on a horizontal axis.

[Problem to be solved by the invention]

In the above conventional technology, since the fan is in a horizontal axis state,
The height of the product is determined by the dimensions of the spiral casing. In this structure, no consideration was given to making it more compact.

In addition, since the fan's suction port is not located symmetrically with respect to each side of the sound deadening box, the aerodynamic performance of the fan changes significantly depending on the position of the suction and discharge ports, making it difficult to control the discharge direction. there were.

It is an object of the present invention to make the device thinner so that it is easier to use when installed in the ceiling, and to be able to connect the duct either in a straight line or at a right angle.

[Means to solve the problem]

In order to achieve the above object, the present invention arranges the fan in the sound deadening box in a vertical axis state, and draws air into all four sides of the sound deadening box.
It has a structure with a discharge port that can be selected. This results in
Even if the fan impeller becomes larger, the horizontal and vertical dimensions of the plane will only increase. The law will be able to be suppressed as much as possible. In addition, the position of the suction port of the muffling box with respect to the suction port of the impeller is the same in all three directions, and the discharge direction can be freely used in three directions.

[Effect]

Regarding thinning, the factors related to the height dimension of the product include the impeller blade width dimension, the flow path dimension of the impeller suction port, and the axial dimension of the motor. By keeping the impeller small and increasing the impeller diameter, the specified aerodynamic performance can be obtained, and by placing the impeller suction port on the motor side, the dimensions in the axial direction of the motor can be shared. It becomes possible to make it thinner. In addition, regarding the flexibility of the discharge port, among the four sides of the sound deadening box,
The shape of the flow path to the impeller suction port can be made almost the same on three side surfaces except for one side that becomes the discharge port, and the discharge port can be made freely.

[Embodiment] An embodiment of the present invention will be described below with reference to FIG. An impeller 1 of a centrifugal fan, a spiral casing 2 enclosing the impeller 1, an electric motor 3 with the impeller 1 attached to its shaft end, a sound deadening box 4 containing all of these, and four sides of the sound deadening box 4. This is a fan with a sound deadening box, which consists of a suction companion flange 5 and a discharge companion flange 6 attached to the provided suction and discharge ports, and a cover plate 7 that blocks the unused suction port, and the electric motor 3 is arranged with the vertical axis facing upward. The suction port is connected to the motor 3 at the end of the shaft.
An impeller 1 facing the side is attached. By adopting such a structure, the product can be made thinner. Moreover, there is an effect that among the suction and discharge ports provided on the side surface of the sound deadening box 4, one can be selected from among three types depending on the installation location.

〔Effect of the invention〕

According to the present invention, since the height of the product can be reduced, the product can be made thinner, making it suitable for installation locations such as the ceiling.

In addition, it can be installed in corners, etc., and the discharge direction can be made flexible.

[Brief explanation of the drawing]

FIG. 1(a) is a cross-sectional view of one embodiment of the present invention, and FIG. 1(b) is a vertical cross-sectional view thereof. 1... Impeller, 2... Spiral casing, 3...
...Electric motor, 4...Muffling whistle, 5...Suction phase flange, 6...Discharge 1 Figure (Q-)

Claims (1)

[Scope of Claims] 1. A fan with a sound deadening box comprising a centrifugal impeller, a spiral casing, an electric motor for driving the impeller, and a sound deadening box housing all of these, comprising: A fan with a sound deadening box, characterized in that the electric motor is arranged in a shaft state, and the impeller is attached to an end of the shaft so that the suction port is on the side of the electric motor.