JPS586Y2 - air conditioner - Google Patents

Description

[Detailed description of the invention] This invention uses a centrifugal fan with a large rotor diameter to maximize air conditioning capacity by smoothing air flow inside the aircraft, while also being thin and height-efficient. The present invention aims to provide an air conditioner with a compact structure whose directional dimensions can be made as small as possible.

A thin air conditioner formed by arranging a thin heat exchanger and a thin fan before and after the heat exchanger is located on the upstream side of the air flow does not take up much installation space, and is compact and lightweight. Since it is possible to change the method, it has been gradually becoming popular in recent years.

Generally, the thin fans used in this type of air conditioner are centrifugal type, and have a structure that sucks air from the front of the rotor and blows it in a centrifugal direction. In this case, the heat exchanger and the fan must be placed close to each other, and an imbalance between the suction area of the centrifugal fan and the heat exchange area of the heat exchanger is unavoidable. The drawback is that it becomes difficult for the suction air to be distributed evenly over the front surface of the heat exchanger, resulting in a reduction in capacity.

In order to solve this problem, it is conceivable to enlarge the rotor size of the centrifugal fan 2' to expand the suction area as shown in Figure 1. If the size of the rotor 7' is increased ignoring the correlation with the dimensions, the lower end of the outer periphery of the rotor 7' will protrude into the blowing chamber 13' below the partition wall 14' below the cooler 4', and the second
As shown in the enlarged figure, 1. The lower end of the outer circumference of the rotor 7'
In this case, there is a concern about a backflow phenomenon in which the wind blown out in the centrifugal direction from the blades of the rotor 7' is sucked back into the blades from the front side, so the outer diameter of the rotor 7' is limited from this point of view. become.

The present invention eliminates the constraints expected in increasing the rotor size, makes it possible to increase the size of the fan rotor, and makes it possible to make the air conditioner thinner and more compact.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with respect to its specific configuration, with reference to each side shown in the accompanying drawings.

3 to 5 are examples of the air conditioner according to the present invention,
The casing 1 has a thin structure in the depth direction, with a suction port 4 opened at the front and a blowout gnore 5 opened at the lower front.

A heat exchanger such as a cooler 3 and a centrifugal fan 2 are housed in this casing 1 in a front-back arrangement close to each other, with the cooler 3 facing the suction port 4 and the centrifugal cuff fan 2 placed in the front suction section. is positioned at the rear of the cooler 3 so as to face the back of the cooler 3, and the air outlet 12 of the fan 2 is communicated with the air outlet 5 of the casing 1. Furthermore, a space 6 for accommodating electrical components is provided at the rear of the cooler 3. The structure is formed inside the casing 1 on the side of the casing 1.

The centrifugal fan 2 has a thin structure with a short axial direction, and includes a rotor 7, a vortex housing 8 surrounding the rotor 7,
It consists of a thin motor 9 whose shaft is directly connected to the rear of the rotor.

The fan has a front suction section at the front in the axial direction and a blowout port 12 in the centrifugal direction, forming a front suction centrifugal blowout type fan.

The rotor 7 has a structure in which a large number of blades are erected in front of the circumferential surface of a circular base at an appropriate pitch. motor 9
The blades are provided so as to be able to rotate in a form that covers them, and the blades are provided so that the recessed portions are arranged behind both ends with respect to the direction of rotation.

The spiral housing 8 is a deformed housing having two curved surfaces facing the circumferential edge of the rotor 7, and has a predetermined shape such that two tongues 11°11 are formed between the housing 8 and the rotor 7. Thus, two air outlets 12, 12 are provided in the same downward direction in the circumferential direction, which is the centrifugal direction of the fan shaft.

The air outlet 12j2 is communicated with the air outlet grille 5 of the casing 1 through a chamber 13 below the fan 2.

As shown in the figure, the spiral housing 8 has a double-headed shape, and the curved surface portion 8a on the left side has an involute curve shape that gradually moves away from the rotor 7 from a point around the loft, and the other curved surface The portion 8b has an optimal shape for guiding the wind to the outlet 12, and the one point is formed on one side of the tongue portion 11 as a pressure transition point, and the lower end opening, which is the most open position, is formed between two points. The air outlet is 12.12.

In addition, among the spiral housings 8, the housing having a curved surface portion 8b that gradually opens in the right direction from the tongue portion 11 as a base point in FIG. 3 is provided with a rectifying core 10 forming a part of the housing. The curved surface portion 8C facing the rotor 7 of the rectifying core 10 is the curved surface portion 8a.
The first part of the winding is brought closest to the rotor, and this part is formed as the other tongue part 11.

And two air outlets opening downward C-J12゜1
2 is connected via a chamber 13 to an outlet grille 5 provided in a horizontally elongated manner at the lower front of the casing 1.

The rotor 7 housed in the spiral housing 8 having the above structure has a large diameter to enlarge the opening area of the front suction part as much as possible. The lowermost part of the rotating outer circumferential surface is housed in the housing 8 in such a way that it slightly enters the chamber 13 provided so as to face both the partition 14 provided directly below the cooler 3 and the blowout gnore 5.

Although the air conditioner constructed in this manner uses one centrifugal fan 2, it has excellent airflow characteristics, reduces driver power loss, and has two air outlets 12.12.
It is possible to blow out cold air evenly from the wide blow-off grille 5, and by arranging the thin heat exchanger 3 and the thin centrifugal fan 2 in close proximity, the cold air flows into the chamber 13 directly below. Since the air is blown forward from the air outlet grille 5 through the air conditioner, it is possible to construct an extremely thin air conditioner with a height dimension as small as possible.

However, in this shape, the lowermost end of the rotating outer circumferential surface of the forward facing blade of the rotor is slightly lower than the partition 14 and faces into the chamber 13, so that the blown air is again removed as shown in Fig. 2. There is a concern that backflow caused by the blades may occur.

Therefore, as shown in FIGS. 3 to 5, the present invention provides a backflow prevention plate 15 that hangs down inside the chamber 13 and is integrated with the partition 14 at a position corresponding to the lowermost part of the rotating outer circumferential surface of the forward-facing blade. It has a unique structure.

By providing such a backflow prevention plate 15, the partition 14 for partitioning the suction passage and the blowout passage becomes substantially at the same level as the lower part of the large diameter rotor 7, so the above-mentioned backflow phenomenon is eliminated. Even if the direction of the wind coming out of the downward outlet 12 is changed to a sharp curve, it can flow smoothly without causing turbulence and can be blown out from the outlet grille 5.

Particularly, in the case of an operation method in which the diameter of the rotor 7 is increased and the rotational speed is decreased to reduce operating noise, the intended function of the backflow prevention plate 15 is fully exhibited.

As described above, the present invention is a thin air conditioner with front suction and front bottom blowout, in which the heat exchanger 3 and the centrifugal fan 2, each of which is thin, are arranged in close proximity to each other in the front and back of the casing 1. In addition to being housed inside the suction port 4, the air is blown from the outlet grille 5 at the lower front through the chamber 13 provided directly below both the devices 2 and 3, so despite being thin. It is possible to make the main body shape even more compact by minimizing the dimension in the height direction.

Moreover, since the diameter of the rotor of the fan 2 is made large, it is possible to generate a suction airflow with a uniform air velocity distribution over almost the entire effective suction area of the heat exchanger 3, and as a result, heat exchange is possible. You can make the most of your abilities.

Furthermore, a backflow prevention plate 15 is provided that is integrated with the partition 14 that partitions the suction passage and the blow-off passage directly below it, and hangs down from the inner end of the partition 14, so that the air that has once blown out is drawn back to the blades. The backflow phenomenon is eliminated, and driving noise and power costs can be further reduced.

Furthermore, since the backflow prevention plate 15 is provided, the diameter of the rotor can be increased and the rotational speed can be lowered, making the operation noise even quieter.

As described above, the present invention has various excellent effects and is an air conditioner that is particularly useful when implemented in a thin structure.

[Brief explanation of the drawing]

FIGS. 1 and 2 are a right side view and an enlarged sectional view of essential parts of a conventional air conditioner. 3 to 5 are a schematic front view, right side view, and enlarged side view of essential parts of an example of the air conditioner of the present invention. 1... Casing, 2... Centrifugal fan, 3... Heat exchanger, 4... Suction port,
5...Blowout grill, 7...Rotor, 1
2...Blowout outlet, 13...Chamber,
14...Partition, 15...Backflow prevention plate.

Claims (1)

[Scope of utility model registration request] A heat exchanger 3 and a centrifugal fan 2 having a suction section in front of a rotor 7 with forward-facing blades and a blowout port 12 disposed below in a centrifugal direction are connected to a rotor 7 with forward-facing blades. The rotor unit 7 is housed inside the suction port 4 of the casing 1 provided at Slightly enter the chamber 13 facing the partition 14 and the blowout grille 5 to the east:
and the air outlet 12 is located in the chamber 13.
The partition 14 is inside the chamber 13.
An air conditioner characterized in that a backflow prevention plate 15' that hangs down from the inner end of the blade and prevents backflow at the partition part 14 is provided at a position corresponding to the lowermost part of the rotating outer peripheral surface of the forward facing blade. Machine.