JPH01212831A - Air conditioner - Google Patents

Abstract

PURPOSE:To reduce losses in pressure, noise, and vibration caused by eddies by providing an arc-shaped guide plate at the bottom of a duct and a square tapering hopper-shaped outlet for the fan so as to guide a current of air to change its direction smoothly and spread the air discharged from the fan. CONSTITUTION:A guide plate 8 in the shape of an arc is attached to the bottom of a duct 2. A square tapering outlet 7 in the shape of a hopper connects the discharge opening of a fan 3 with the underside of a filter 5. The air circulated from rooms is orientated toward the fan 3 by the guide plate 8 provided in the duct 2 and led through an opening 4 to the fan 3. The current discharged from the fan 3 is decelerated smoothly with eddies reduced as it passes through the hopper-shaped outlet 7 to the filter 5. As a result, the losses in pressure, noise, and vibration, all caused by eddies, are reduced and the motive power required to drive the fan is also reduced. The hopper-shaped outlet 7 and the casing 1 jointly serve to shut off the noise from the fan 3, so that the noise coming out of the casing 1 is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air conditioner used in buildings, etc., and particularly to a space-saving type air conditioner.

2. Description of the Related Art In general, this type of air conditioner has a rectangular parallelepiped-shaped return air duct 102 formed on one side of a vertical casing 101, as shown in FIGS. , a fan 103 is arranged at the lower side thereof, and there is an opening 104 between them through which return air flows.

A filter 105 for cleaning the air is disposed above the discharge of the fan 103, and a water coil 106 for heating and cooling the air is disposed above the filter. A chamber 107 was formed to diffuse the air.

Problems to be Solved by the Invention In such a conventional configuration, the duct 1o2 has a rectangular parallelepiped shape, and the bottom surface is perpendicular to the air flow, resulting in a large pressure loss when the wind direction changes. The rapid expansion of the discharge flow causes a large pressure loss due to the generation of vortices, which increases the power of the fan, and there are also problems in that noise and vibration increase due to the generation of vortices.

The present invention solves these problems, and aims to provide an air conditioner that reduces pressure loss due to wind direction change vortices and rapid expansion, and reduces noise and vibration.

Means for Solving the Problem In order to solve this problem, the present invention attaches a water coil to the upper part of a vertical casing, forms a duct on the side inside the casing for introducing return air from the room, A fan for returning air from the room and supplying air into the room is arranged at the bottom of the casing, a filter for cleaning the air is arranged above the outlet of the fan, and the filter is placed above the water coil. The air conditioner is configured such that an arc-shaped guide plate is provided at the lower part of the duct, and a square pyramid-shaped hopper is provided between the outlet of the fan and the filter.

Function: With this configuration, the return air drawn from the room through the duct is given an inflow direction to the fan by the arc-shaped guide plate. Further, the discharge flow velocity of the fan is smoothly decelerated by the square pyramid-shaped hopper and guided to the filter.

EXAMPLE Hereinafter, an example of the present invention will be explained with reference to FIGS. 1, 2, and 3.

As shown in the figure, a rectangular parallelepiped-shaped return air duct 2 is formed on one side of a vertical casing 1, and a fan 3 is arranged on the lower side of the duct 2, so that air flows into the fan 3 between them. The main part of the air conditioner is constructed by disposing a filter 5 for cleaning the air above the outlet of the fan 3, and a water coil 6 for heating and cooling the air above the filter 5 and above the casing 1. ing. An arcuate guide plate 8 is attached to the bottom of the duct 2. Also, the fan 3
A square pyramid-shaped hopper section 7 is attached between the discharge port of the filter 6 and the lower surface of the filter 6.

With the above configuration, the return air from the room is given an inflow direction to the fan 3 by the guide plate 8 provided in the duct 2, and is guided to the fan 3 through the opening 4. In addition, the discharge air speed of the fan 3 is smoothly slowed down by the hopper 7, reducing vortex flow and being guided to the filter 5, reducing pressure loss, noise and vibration due to the vortex flow, and reducing fan power. . Furthermore, the discharge noise of the fan 3 is double-insulated by the hopper 7 and the casing 1,
There is also the effect that noise to the outside of the casing 1 is reduced.

Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, the discharge flow is improved by attaching an arc-shaped guide plate to the lower part of the duct and a quadrangular pyramid-shaped hopper part to the discharge of the fan. As the flow is diffused and the direction of the air is changed smoothly, the pressure loss, noise and vibration due to vortex flow are reduced compared to conventional methods, and the fan power can be reduced.Furthermore, the hopper section and casing reduce fan discharge noise. It has the effect of reducing noise due to double sound insulation.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an air conditioner according to an embodiment of the present invention, and FIG.
The figure is a front sectional view of the same air conditioner, FIG. 3 is a side sectional view of the same air conditioner, FIG. 4 is a plan view of a conventional air conditioner, and FIG. 5 is a front sectional view of the same air conditioner. FIG. 6 is a side sectional view of the air conditioner. 1...Casing, 2...Duct, 3
...Fan, 5...Fill, 6...
...Water coil, 7...Hopper part, 8...
...Guide board. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure? ---Duct 3- Fano 7-・-111, C I-P Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A water coil is attached to the top of the vertical casing, a duct for introducing return air from the room is formed on the side of the casing, and a fan for returning air from the room and supplying air to the room is installed in the casing. A filter is placed at the bottom of the casing to clean the air, and is located between the fan and the water coil, and an arcuate guide plate is provided at the bottom of the duct to clean the air between the fan's outlet and the filter. An air conditioner equipped with a square pyramid-shaped hopper.