JPS5913575Y2 - Air conditioner outdoor unit - Google Patents

Description

[Detailed description of the invention] The present invention provides a heat exchanger that surrounds a blower fan, a fan orifice that is recessed inward at the upper opening of the heat exchanger, and a fan that covers the opening of the orifice. The present invention relates to an outdoor unit of an air conditioner equipped with a fan guard, and particularly relates to an improvement of the fan orifice.

In conventional outdoor units, the shape of the fan orifice that is integrally molded with the cabinet often has a bellmouth shape or a cylindrical shape, and there are two types of molding directions: one facing outward from the cabinet and one facing inward. Recently, in order to make outdoor units more compact, a fan orifice (cabinet facing inward) that protrudes in the direction opposite to the direction of air flow by the fan has been adopted.Furthermore, in order to effectively utilize the space of the unit, the heat exchanger has a It is housed in a closed form in the fan orifice.

In this case, the heat exchanger has a disadvantage in that the performance of the heat exchanger cannot be fully demonstrated because the flow of air passing therethrough is obstructed.

In addition, air flows irregularly in closed parts, resulting in increased noise.

One way to make the upper part of the heat exchanger work more effectively is to make the cylindrical length of the fan orifice as short as possible, but in this case, the relative positions of the fan and orifice, as well as the fan and fan guard, become a problem.

In other words, in the case of a fan orifice with a short cylindrical length, it is necessary to move the fan upward and place it closer to the fan orifice in order to prevent deterioration of the fan characteristics.
At this time, there is a drawback that noise is increased due to interference between the air discharged from the fan and the fan guard.

There is also a safety problem due to the proximity of the fan and fan guard.

As described above, the relative positions of the fan and the fan orifice and the fan and the fan guard have advantages and disadvantages.

For example, as shown in FIG. 1, which is a conventional example, air sucked in through the ventilation opening of the cabinet 6 as the fan 2 rotates is guided upward through the heat exchanger 5 (the air flow is indicated by an arrow). show).

In this conventional system, when the length of the cylindrical part 3a of the fan orifice 3 is increased, the upper part of the heat exchanger 5 becomes the fan orifice 3.
At the closed part, the suction air interferes with each other and becomes turbulent, and the flow direction of the air changes greatly at the lower end of the fan orifice 3, which also causes noise. cause

If the length of the cylindrical portion 3a of the fan orifice 3 is shortened in order to reduce the above-mentioned drawbacks, the fan 2 needs to be provided close to the fan orifice 3 in order to prevent deterioration of the fan characteristics. The position of the fan guard 1 and the fan guard 1 are pinched together, and the wind noise of the fan guard 1 causes a lot of noise.

The present invention was developed in view of the above points, and aims to improve safety and reduce noise without impairing the characteristics of the fan.

An embodiment of the present invention will be described below with reference to FIG.

In FIG. 2, 2 is a fan, and a motor support stand 8
A heat exchanger 5 is disposed around the fan 2 so as to surround the fan 2 .

The heat exchanger 5 is housed in a cabinet 6, and air passing through the heat exchanger 5 flows in through an inlet 11 formed on the peripheral side of the cabinet 6.

Reference numeral 3 denotes a fan orifice provided in the upper opening of the heat exchanger 5, and is used to smoothly exchange heat in the heat exchanger 5.

The fan orifice 3 consists of a conical part 3'a that is narrowed inward into an inverted conical shape, and a cylindrical part 3'b that is integrally connected to the conical part 3'a and is slightly bent upward. An air outlet 12 is formed inside the cylindrical portion 3'b, and a fan 2 faces the air outlet 12 with a portion thereof inserted.

1 is a fan guard, which is attached to the fan orifice 3 so as to cover the ventilation port 12 of the fan orifice 3;
This is to ensure safety so that fingers or the like do not accidentally enter the ventilation opening 12.

The fan guard is formed in a grid or mesh shape to allow ventilation.

Next, the operation in the embodiment will be explained.

When the fan 3 by the fan motor 7 is rotated, the air inside the heat exchanger 5 is blown out through the fan guard 1 from the ventilation port 12, and at the same time, cold outside air flows into the cabinet 6 from the intake port 11 of the cabinet 6. .

The air that has flowed into the cabinet 6 passes through the heat exchanger 5 and reaches a high temperature. In particular, the air that has flowed in from the upper part of the cabinet 6 passes through the heat exchanger 5 and then reaches the fan orifice 3.
It flows along the inner surface of the conical part 3'a, is guided to the cylindrical part 3'b, and is discharged through the fan guard 1.

Therefore, the air flowing particularly through the upper part of the cabinet 6 flows smoothly without a sudden change in direction compared to a fan orifice shaped like the conventional example shown in FIG. It is possible to prevent a decrease in heat exchange efficiency caused by heat exchange.

Furthermore, in order to prevent noise from air passing through the fan guard 1, it is necessary to increase the distance between the fan guard 1 and the fan 2, but in order to make the outdoor unit more compact, the fan guard 1 is not protruded outward. It is desirable to lower the position of the fan 2 downward, and by moving the fan 2, it is necessary to further narrow the conical portion 3'a and lower the position of the ventilation opening 12 downward.

In this case, in the case of the fan orifice 3 of the present embodiment, since the orifice 3 is composed of the conical part 3'a and the cylindrical part 3'b that is slightly bent upward, The passage of air passing through is orifice 3.
The air is smoothly guided to the cylindrical portion 3'b without being obstructed by the airflow, and is blown out from the ventilation port 12 without being obstructed by the heat exchanger. The wind noise of the air passing through the fan guard 1 can be reduced.

Moreover, since the cylindrical portion 3'b is slightly bent upward, air can be smoothly blown out without generating wind noise, and the cylindrical portion 3'b.

There is no interference with the inner wall, so there is no deterioration in air blowing performance.

As described above, in the present invention, the fan orifice is composed of a conical part narrowed inward into an inverted conical shape and a cylindrical part connected to the conical part and bent slightly upward. play.

1. Compared to the past, the flow of air passing through the upper part of the heat exchanger is smoother, noise caused by turbulence can be reduced, and reduction of the heat exchanger due to deterioration of air blowing characteristics can be prevented.

2. For the purpose of reducing wind noise in the fan guard, the conical part of the veorifice was narrowed deeper and the position of the cylindrical part was moved downward, and the fan was also Even if the distance between the fan guard and the fan is maintained longer by moving it downward in response to Therefore, the noise at the fan guard can be reduced.

3. Since the cylindrical portion is only slightly folded upward, interference with the inner wall of the cylindrical portion of the air blower can be suppressed, and a reduction in air blowing performance can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a conventional outdoor unit, and FIG. 2 is a schematic sectional view of an outdoor unit showing an embodiment of the present invention. 1: fan guard, 2: fan, 3': fan orifice, 3'a: conical part, 3'b: cylindrical part, 5: heat exchanger.

Claims (1)

[Claim for Utility Model Registration] A heat exchanger is arranged to surround a blower fan, and an inwardly recessed fan orifice is provided in the upper opening of the heat exchanger, and a fan guard is provided to cover the opening of the orifice. In the outdoor unit, the fan orifice is composed of a conical part narrowed inward into an inverted conical shape, and a cylindrical part connected to the conical part and bent slightly upward. An outdoor unit of an air conditioner featuring: