JPH11281144A - Heat exchanger for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve silentness by making a front face wind velocity of a heat exchanger uniform, thereby enhancing heat transfer of a heat exchange. SOLUTION: A crossflow fan 2 and a circular arc-like heat exchanger 3 integrated with front and back heat exchangers are contained in a sheathing case 5 having a front grill are contained in an indoor unit body 1. When the fan is rotated, the air sucked in the indoor unit via a filter 6 through a suction grill of the case 6 is passed through the exchanger 3 surrounding in a circular arc-like state at a predetermined distance from a front face to a back face of the fan 2, and then diffused in a room as the heated/cooled air from an air outlet 7 through the fan 2. Thus, its front face wind velocity becomes uniform. A distribution of a heat transfer rate becomes uniform. Heat transferability of heat exchanging is enhance. The exchanger can be simplified, and silentness can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger used for an indoor unit of an air conditioner or the like.

[0002]

2. Description of the Related Art An indoor unit as an indoor unit of an air conditioner includes a heat exchanger, a fan motor, and a cross flow fan driven by the motor to blow air heated / cooled by the heat exchanger into a room. A blower and an indoor control unit are mounted. In the current situation where the efficiency of air conditioners is to be improved, the use of heat exchangers with increased fin heat transfer areas is becoming mainstream. It is widely used because it can be compactly housed in a small indoor unit by being bent around and arranged in a U-shape.

Next, an example of an indoor unit of an air conditioner using a multi-stage heat exchanger is shown. FIG. 2 is a sectional view of a main part of an indoor unit in which a heat exchanger divided into three parts is arranged. In the figure, 1
Is a main body of the indoor unit, 2 is a cross flow fan as a blower, 3a, 3b, and 3c are heat exchangers, and 4 is a heat transfer tube for passing a refrigerant disposed on a heat transfer fin of an aluminum plate of each heat exchanger. 5 is an outer case including a front grill,
6 is a filter, 7 is an outlet.

In the indoor unit thus configured, when the cross flow fan 2 is rotated, the air sucked into the indoor unit via the filter 6 through the suction grill of the outer case 5 constitutes a heat exchanger. After passing through the vertical portion 3a, the oblique portion 3b and the rear heat exchanger 3c of the front heat exchanger, it flows through the cross flow fan 2 and is blown into the room as air heated / cooled from the outlet 7 through the outlet 7.

[0005] As another example of an indoor unit of an air conditioner using a multi-stage heat exchanger, FIG. 3 shows a cross section of a main part of an indoor unit in which a heat exchanger divided into two is arranged. In FIG. 3, the same components as those in FIG. 2 are denoted by the same reference numerals. In the figure, 1 is an indoor unit main body, 2 is a cross flow fan as a blower, 3
Reference numerals a and 3c denote heat exchangers, 4 denotes heat transfer tubes disposed on heat transfer fins of the respective heat exchangers, and 5 denotes an outer case including a front grille, 6 denotes a filter, and 7 denotes an outlet. is there.

The operation of this type indoor unit is basically the same as that of FIG.
The description is omitted because it is the same as that of FIG. In the heat exchanger of this example, the vertical and oblique portions of the front heat exchanger of the heat exchanger divided into three are combined into one to form an arc-shaped heat exchanger 3a, but the rear heat exchanger on the rear portion is formed. 3c is still separate.

[0007]

As described above, the conventional heat exchanger can be compactly housed in the indoor unit. However, in the heat exchanger having the above-mentioned shape, the joint portion of the heat exchanger and the vicinity thereof are separated from other portions. As the wind speed is higher than that of the wind, there are places where the wind does not pass, resulting in uneven front wind speed and uneven distribution of the heat transfer coefficient. could not.

Further, in the production of a heat exchanger, the production process is complicated by subdividing the heat exchanger into a U-shape or a U-shape. Therefore, an object of the present invention is to provide a heat exchanger of an air conditioner that enhances the heat transfer performance of heat exchange and achieves excellent quietness by making the front wind speed of the heat exchanger uniform.

[0009]

According to a first aspect of the present invention, there is provided a heat exchanger for an air conditioner, wherein a heat passage is provided between an inlet and an outlet provided in a main body. In an air conditioner in which an exchanger, a blower, and the like are arranged, the air conditioner is arranged so as to surround the blower at a predetermined distance from the front surface to the back surface in an arc shape.

In this way, the wind speed at the front is made uniform and the distribution of the heat transfer coefficient is made uniform, so that the heat transfer of heat exchange is enhanced, the heat exchanger can be made compact, and the quietness can be improved. . In addition, since it is not necessary to partially manufacture the heat exchanger into a plurality of pieces, the manufacturing process is simplified,
When manufacturing aluminum plate heat transfer fins,
Only one punching operation is required, and the productivity of the heat exchanger can be increased.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a heat exchanger of an air conditioner according to the present invention will be described with reference to a cross-sectional view of a main part of an indoor unit in FIG. In the figure, 1 is an indoor unit main body, 2 is a cross flow fan as a blower, 3 is an arc-shaped heat exchanger integrating a front part and a back part of a heat exchanger, which is a feature of the present invention. It is.

Reference numeral 4 denotes a heat transfer tube for the passage of refrigerant disposed on the heat transfer fins of the aluminum plate of the heat exchanger, 5 denotes an outer case including a front grill, 6 denotes a filter, and 7 denotes an outlet. The heat exchanger 3 is arranged in a circular shape at a predetermined distance from the front surface to the rear surface of the blower, and is arranged so as to correspond to all grills that suck the wind.

In the indoor unit thus configured, when the cross flow fan 2 is rotated, the air sucked into the indoor unit through the filter 6 through the suction grill of the outer case 5 flows from the front to the back of the blower. After passing through the heat exchanger 3 surrounding the arc at a predetermined distance, the air flows through the cross flow fan 2 and is blown into the room as heated / cooled air from the outlet 7.

In the heat exchanger of the air conditioner according to the present invention, the front and back portions of the heat exchanger 3 are formed in an arc shape and have no joint, so that the front wind speed becomes uniform. , The distribution of the heat transfer coefficient is also uniformed. Thus, the heat transfer performance of heat exchange can be increased, the heat exchanger can be made compact, and an air conditioner excellent in quietness can be obtained.

In the heat exchanger of the present invention, the front and back portions of the heat exchanger are integrally formed in an arc shape, so that the heat exchanger has a partially U-shaped heat exchanger. The production process is simplified because there is no need to subdivide into multiple parts, and the production process is simplified.Furthermore, when manufacturing heat transfer fins of aluminum plates, they are separately subdivided into several parts in the past. However, since the heat exchanger is integrated, only one punching operation is required, so that the productivity can be improved even when manufacturing the heat exchanger.

[0016]

As described above, since the heat exchanger of the air conditioner of the present invention has no joint, the wind speed at the front is uniform and the distribution of the heat transfer coefficient is uniform. Thus, the heat transfer performance of heat exchange can be increased, the heat exchanger can be made compact, and an air conditioner excellent in quietness can be obtained.

Further, unlike the conventional heat exchanger, it is not necessary to manufacture the heat exchanger by partially dividing the heat exchanger into a plurality of parts. This simplifies the manufacturing process. Since the heat exchanger is integrated, only one punching operation is required, and the productivity of the heat exchanger can be increased.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an indoor unit of an air conditioner provided with a heat exchanger of the present invention.

FIG. 2 is a schematic configuration diagram of an indoor unit of an air conditioner provided with a conventional heat exchanger.

FIG. 3 is a schematic configuration diagram of an indoor unit of an air conditioner provided with a conventional heat exchanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Indoor unit main body 2 Cross flow fan 3 Heat exchanger 3a Vertical part of front heat exchanger 3b Diagonal part of front heat exchanger 3c Back heat exchanger 4 Heat transfer tube 5 Exterior case 6 Filter 7 Outlet

Claims (1)

[Claims] 1. An air conditioner in which a heat exchanger, a blower, and the like are arranged in a ventilation path connecting an inlet and an outlet provided in a main body of the air conditioner. A heat exchanger of an air conditioner, which is arranged to surround.