JPH04190025A - Air conditioner - Google Patents

Abstract

PURPOSE:To make the thickness of a fan easing thinner at portions where fan units are made smaller in diameter and enable reduction in noises and the enhancement of a heat exchange efficiency at portions where fun units are made larger in diameter by making the diameter of a cross-flow fan smaller on its end part sides as compared with that on its central part side and additionally providing a heat exchanger at a place opposed to the central portion where the fan units have the large diameter. CONSTITUTION:A cross-flow fan 1 is constituted in such a way that, for example, three fan units 3 positioned at the central part of the cross-flow fan are formed to have a large diameter, fan units 4, 4 positioned at both ends of the fan units 3 to have a little smaller diameter than that of the fan units 3, and fan units 5, 5 positioned on both sides of the fan units 4 to have the smallest diameter. A heat exchanger 15a is provided curvedly along the inner surface of a casing 2 throughout the entire surface on the air suction side of the cross-flow fan 1, and a heat exchanger 15b is additionally provided only on the air suction side of the large diameter fan units 3. By this method, much of heat-exchanging is carried out by the large diameter fan units 3 positioned at the central portion and having a large air volume, thus enhancing a heat exchange efficiency as a whole. In addition, since both the end parts 2b of the casing 2 are made smaller in depth size, the casing 2 gives an impression of visually thin thickness. Furthermore, since the fan units 3 are made larger in diameter, noises can also be reduced in the case of the same heat exchange efficiency.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an air conditioner suitable for use as an indoor unit of a so-called split type air conditioner that is divided into an indoor unit and an outdoor unit, and particularly relates to an air conditioner suitable for use as an indoor unit of a so-called split type air conditioner that is divided into an indoor unit and an outdoor unit. This invention relates to an air conditioner characterized by its shape and the relative relationship between heat exchangers.

[Conventional technology]

The indoor unit of a split air conditioner includes at least a fan that introduces and exhausts indoor air, a motor that drives this fan, and a heat exchanger that heats or cools the air by exchanging heat with the introduced air. It is being A cross-flow fan is generally used as the fan, and is configured to be thin.

Conventionally, this cross-flow fan uses a plurality of fan units with the same diameter stacked coaxially, but the thickness of the indoor unit depends on the diameter of this cross-flow fan.

[Problem to be solved by the invention]

Incidentally, in order to reduce the noise, it is possible to increase the diameter, but if this is done, it will not be possible to meet the demand for a thinner device. On the other hand, if the diameter of the fan is reduced in an attempt to promote thinning, the air storage will be reduced and the heat exchange rate will be reduced.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an air conditioner that can meet the demands for thinness and low noise, and has high heat exchange efficiency.

[Means to solve the problem]

The above purpose is to reduce the diameter of the cross-flow fan in an air conditioner that is equipped with a cross-flow fan and a heat exchanger inside the housing, and in which air introduced from the room is heat-exchanged by the heat exchanger and then discharged into the room again. This is achieved by making the end portions smaller in diameter than the central portion and adding a heat exchanger at a location opposite the large diameter portion of the central portion.

[For production]

According to the above configuration, the thickness of a portion that has been restricted by the diameter of the cross flow fan can be reduced to below the restriction. In other words, if the diameter of the end of the crossflow fan is made small and the entire diameter of the casing is made thinner, it will be visually perceived as thinner, making it difficult to be aware of the size of the air conditioner. . By adding a heat exchanger at the center, for example by adding one more stage, it becomes possible to perform a large amount of heat exchange at the center.

Overall heat exchange efficiency can be improved.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram showing a schematic configuration of an air conditioner according to an embodiment. In the figure, this air conditioner is equipped with a cross-flow fan 1 housed in a housing 2, but in this case, the cross-flow fan 1 is composed of a plurality of cross-flow fan units with different diameters stacked coaxially. consists of things. That is, in the cross flow fan 1, for example, the three fan units 3 in the center have a large diameter, the fan units 4, 4 on both sides have a slightly smaller diameter, and the fan units 5, 5 on both sides have a slightly smaller diameter. It is formed with the smallest diameter.

These fan units 3, 4.5 are fixed coaxially to the rotating shaft and are rotationally driven by a motor 7 connected to the rotating shaft 6.

In this regard, the housing 2 is arranged along the outer contour of this cross-flow fan 1, as shown in phantom lines, in the central part 2.
It is formed to have a curved surface from a to the end portion 2b.

By configuring in this way, the housing 2 has its end 2b
Since the depth and width of the screen are reduced, the screen appears visually thinner, and the presence of the screen as a whole can be reduced.

FIG. 2 is a schematic explanatory diagram showing the relationship between the cross flow fan and the heat exchanger in the above embodiment. In this embodiment, the heat exchanger 15 is formed in two stages.

One of them is a heat exchanger 15a provided over the entire surface of the air suction side of the cross flow fan 1, and is provided in a curved manner along the inner surface of the housing 2 shown in FIG. The other one is a heat exchanger 15b provided only on the air suction side of the large-diameter fan unit 3. These heat exchangers 15
a and 15b are connected to each other by piping, and the heat exchange medium is the heat exchanger 15a.

15b and the outdoor unit. Although not shown in detail, two rows of piping run through the heat exchanger 15a, and one row of piping runs through the heat exchanger 15b. Therefore, there are three rows of piping in the large-diameter fan unit 3 part, and two rows in the other parts.

With this configuration, it is possible to exchange more heat with the central large-diameter fan unit 3 with a large air volume, and it is possible to improve the heat exchange efficiency as a whole. Furthermore, since the depth dimensions of both ends 2a and 2b of the casing 2 are reduced, they are visually perceived as being thinner. Furthermore, since the fan unit 3 in the center is set to have a large diameter, noise will also be reduced if the fan unit 3 has the same thermal efficiency.

FIG. 3 is a configuration diagram showing the internal structure of an air conditioner according to another embodiment.

In the figure, the crossflow fan 1 has five fan units 8 in the center having a cylindrical shape with a large diameter.

Fan unit 9 on the right side of this large diameter fan unit 8
is formed into a cylindrical shape with a smaller diameter than the fan unit 8, and the left side fan unit 10 of the larger diameter fan unit 8 and the right side fan unit 11 of the smaller diameter fan unit 9 are formed into a conical shape, and furthermore, the fan units on both sides thereof are formed into a conical shape. 12.13 is the inner fan unit 10.11 respectively
It is formed into a conical shape. In the figure of this cross flow fan 1, the rotation shaft 6 on the left side has a
A motor is connected to drive the rotation.

Further, a heat exchanger 15 is disposed on the upstream side of the cross flow fan in the air blowing direction. The heat exchanger 15 is arranged in a curved manner as shown in the imaginary line in accordance with the difference in diameter of the cross flow fan 1. In this example, heat exchanger 1
Reference numeral 5 denotes a general heat exchanger 15a whose end extends around to the rear of the rotating shaft 6, and a partial heat exchanger 15b provided only at a central portion facing the large-diameter fan unit 8. It has a two-stage configuration. In addition, this heat exchanger 1
5a.

The heat exchange medium 15b communicates with an outdoor unit via piping (not shown).

With the above configuration, the portions of the heat exchanger 15 facing the fan units 10.12.9 and 11.13 on both sides of the cross-flow fan 1 are curved and brought closer to the rotating shaft 6 of the cross-flow fan 1. Therefore, both ends can be made thinner than the center. In this case, the heat exchanger 15a
Since the heat exchanger 15b is ventilated as in the conventional case, and the heat exchanger 15b is also ventilated, the overall heat exchange efficiency is increased only by the heat exchanger 15b, as in the previous embodiment.

〔Effect of the invention〕

As is clear from the above description, the present invention has been developed in which the diameter of the crossflow fan is gradually reduced from the center to the left and right ends, and a heat exchanger is added to correspond to the large diameter portion. According to the above, it is possible to make the small diameter part of the fan thinner and the large diameter part to reduce noise, and the heat exchange efficiency can be increased by adding a heat exchanger installed in the large diameter part. can.

Further, according to the invention as claimed in claim 2, in which the end portion side is formed to have a small diameter and the center portion side is formed to have a large diameter, the side portions of the casing can be formed thin, and the air conditioner looks thin visually. can be provided.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram showing the configuration of an air conditioner according to an embodiment, Fig. 2 is a schematic explanatory diagram showing the relationship between a cross flow fan and a heat exchanger, and Fig. 3 is an air conditioner according to another embodiment. FIG. 2 is a schematic configuration diagram showing the internal structure of the machine. In the figure, 1 is a crossflow fan, 2 is a housing, 2a is a center part, 2b is an end part, 3, 4, 5, 8, 9° 10, 11.1
2.13 is the fan unit, 15.15a. 15b is a heat exchanger. Patent Applicant: Fujitsu General Co., Ltd. Agent, Patent Attorney: Taku Ohara

Claims (1)

[Claims] (1) In an air conditioner that is equipped with a cross-flow fan and a heat exchanger inside the housing, the air introduced from the room is heat-exchanged by the heat exchanger, and then discharged into the room again. An air conditioner characterized in that the diameter of the end portion is smaller than that of the end portion, and a heat exchanger is added at a location opposite the large diameter portion of the central portion.