JP2000329364A - Wall-hanging type indoor unit for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop the maximum heat exchanging performance of a front side heat exchanger and rear side heat exchangers respectively by a method wherein the front surface area and the heat transfer area of the rear side heat exchangers are increased so as to be larger than those of the front side heat exchanger. SOLUTION: A front side heat exchanger 21 and rear side heat exchangers 22a, 22b are arranged above a crossflow fan 5 under a combined condition so as to have the shape of λ when the same are seen from the side surfaces of them. The front side heat exchanger is positioned before the crossflow fan 5 under slightly slanted condition into obliquely rearward. The rear side heat exchangers 22a, 22b are combined under slightly and rearwardly bent condition so as to be projected upwardly and the rear side heat exchanger 22a is positioned above the crossflow fan 5 under downwardly and rearward slanted condition while the rear side heat exchanger 22b is positioned above the crossflow fan 5 in obliquely rearward under a largely slanted condition. In this case, the front area of the rear side heat exchangers 22a, 22b or an air passing area and a heat transfer area or the total sum of the surface areas of fins and tubes is specified so as to be larger than that of the front side heat exchanger 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a wall-mounted indoor unit of an air conditioner.

[0002]

2. Description of the Related Art FIG. 2A shows an example of a conventional wall-mounted indoor unit of an air conditioner. Indoor air inlets 2 and 3 are formed in the upper and upper front surfaces of the indoor unit main body 1 installed on the upper portion of the indoor wall surface, and conditioned air outlets 4 are formed in the lower front portion.

In the indoor unit main body 1, a cross flow fan 5 rotatably driven around a horizontal axis 15 parallel to the wall surface is provided, and a fin tube type heat exchanger is provided above the cross flow fan 5. Front side heat exchangers 6a, 6b
And the rear-side heat exchanger 7 are arranged in a state of being combined in a λ (lambda) shape in a side view.

During operation of the air conditioner, the front heat exchanger 6a,
Refrigerant from an outdoor unit (not shown) circulates through 6b and the rear heat exchanger 7, and the cross flow fan 5 rotates in the direction of the arrow.

Then, indoor air is sucked into the indoor unit main body 1 from the suction ports 2 and 3, and the front side heat exchanger 6a,
In the process of flowing through 6b and the rear heat exchanger 7, the air is cooled or heated to be conditioned air, and is guided from the outlet 4 to the louver 12 through the outlet air passage 11 formed by the front wall 9 and the rear wall 10. Is blown out into the room. 13 is the front side heat exchanger
This is a wind shield plate that shields a gap between 6a and the rear heat exchanger 7.

[0006]

When the wind speed distribution passing through the front-side heat exchangers 6a and 6b and the rear-side heat exchanger 7 of the above-mentioned conventional indoor unit was measured, as shown in FIG. The wind speed passing through the rear heat exchanger 7 is the front heat exchanger
The result is that the wind speed passing through 6a and 6b is more than twice as high. In FIG. 2B, the size of the arrow indicates the magnitude of the wind speed, the direction of the arrow indicates the flow direction, and the base point of the arrow indicates the measurement point.

However, since the wind speed passing through the rear-side heat exchanger 7 is too high, air passes without sufficiently exchanging heat in the rear-side heat exchanger 7, and the heat exchange of the rear-side heat exchanger 7 occurs. There was a problem that the performance could not be fully exhibited.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its gist is to provide an indoor unit main body mounted on the upper part of the indoor wall surface, and the indoor unit body is provided on the upper surface. A front side heat exchanger comprising a fin tube type heat exchanger above a cross flow fan that is formed with an air inlet and a conditioned air outlet at the lower part of the front surface and is driven to rotate around a horizontal axis parallel to the wall surface In a wall-mounted indoor unit of an air conditioner in which a heat exchanger and a rear heat exchanger are arranged in a λ shape in a side view, the front area and the heat transfer area of the rear heat exchanger are changed to the front side. A wall-mounted indoor unit of an air conditioner, characterized in that it is larger than that of a heat exchanger.

[0009]

An embodiment of the present invention is shown in FIG.
(A) is a schematic longitudinal sectional view of the indoor unit, and (B) is a diagram showing a wind speed distribution passing through the heat exchanger. Front heat exchanger 21
The rear heat exchangers 22a and 22b are arranged above the cross flow fan 5 in a state where they are combined in a λ (lambda) shape in a side view.

The front-side heat exchanger 21 is located in front of the cross flow fan 5 in a state of being slightly inclined rearward.
The rear-side heat exchangers 22a and 22b are connected in a slightly upwardly convexly bent state, and the rear-side heat exchanger 22a is located above the crossflow fan 5 in a state where the rear-side heat exchanger is inclined downward and downward. 22b is located obliquely above and behind the cross flow fan 5 in a state of being inclined more greatly than 22a.

The sum of the front areas of the rear heat exchangers 22a and 22b, that is, the area through which air passes, and the heat transfer area, that is, the sum of the surface areas of the fins and tubes, is determined by the front heat exchanger.
21 has been larger than that. The other structure is the same as that of the conventional structure shown in FIG. 2A, and the corresponding members are denoted by the same reference numerals and description thereof will be omitted.

When the air conditioner is operating, the suction port 2
Almost all of the room air sucked into the indoor unit main body 1 flows through the front-side heat exchanger 21, and almost all of the room air sucked into the indoor unit body 1 from the suction port 3 is the rear-side heat exchange Flow through the vessels 22a and 22b.

Although the amount of air sucked from the inlet 3 is larger than the amount of air sucked from the inlet 2, the front and heat transfer areas of the rear heat exchangers 22a and 22b are larger than those of the front heat exchanger 21. Therefore, the wind speed distribution passing through the front-side heat exchanger 21 and the rear-side heat exchangers 22a and 22b is shown in FIG.
The wind speed passing through the rear-side heat exchangers 22a and 22b is substantially equal to the wind speed passing through the front-side heat exchanger 21.

The ratio of the air flow passing through the rear heat exchangers 22a and 22b to the heat transfer area is substantially equal to the ratio of the air flow flowing through the front heat exchanger 21 to the heat transfer area. The heat exchangers 22a and 22b and the front-side heat exchanger 21 can exhibit their maximum heat exchange performance.

Further, it is possible to prevent a noise caused by an excessive amount of air passing through the rear heat exchanger as in the related art.

[0016]

According to the present invention, since the front area and the heat transfer area of the rear heat exchanger are made larger than those of the front heat exchanger, the air volume passing through the rear heat exchanger and the front heat exchanger are reduced. The amount of air passing can be made substantially equal.

As a result, the ratio of the air flow passing through the rear heat exchanger to the heat transfer area can be made substantially equal to the ratio of the air flow passing through the front heat exchanger to the heat transfer area.
The front-side heat exchanger and the rear-side heat exchanger can exhibit their maximum heat exchange performance.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, in which (A) is a schematic longitudinal sectional view, and (B) is a diagram showing a wind speed distribution passing through a heat exchanger.

2A and 2B show a conventional indoor unit, wherein FIG. 2A is a schematic longitudinal sectional view, and FIG. 2B is a view showing a wind speed distribution passing through a heat exchanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Indoor unit main body 2, 3 Suction port 4 Outlet 5 Cross flow fan 21 Front side heat exchanger 22a, 22b Back side heat exchanger

Claims (1)

[Claims] 1. An indoor unit main body installed on an upper part of an indoor wall has an air inlet at an upper front part and an upper part at an upper part, and a conditioned air outlet at a lower part on the front part, and rotates around a horizontal axis parallel to the wall. A wall mount of an air conditioner in which a front side heat exchanger comprising a fin tube type heat exchanger and a rear side heat exchanger are arranged in a λ shape in a side view above a driven cross flow fan. A wall-mounted indoor unit for an air conditioner, wherein a front area and a heat transfer area of the rear heat exchanger are larger than those of the front heat exchanger.