JPS6224177Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an air conditioner using a cross flow fan as a blower, and particularly relates to a heat exchanger thereof.

Construction of the conventional example and its problems A conventional air conditioner of this type was constructed as shown in FIG. 1b. That is, 1 is an impeller, 2 is a tongue, 3 is a rear guider, and 4 is a heat exchanger. In this heat exchanger, as shown in Fig. 1a, the fins 5 are spaced apart by d.
were arranged in parallel. And in the case of diagram b,
A forced vortex V (circulating flow region) is generated inside the impeller, and penetrating flows f ₁ , f ₂ , . . . surrounding it are induced to perform a blowing action. In the figure, 6 and 7 are the top plate and bottom plate of the heat exchanger 4, and 8 is a heat transfer tube.

However, in an air conditioner having a conventional configuration including the heat exchanger 4, the impeller 1 and the heat exchanger 4
Since the suction area S from the closest portion to the vicinity of the tongue 2 becomes very narrow, the heat exchanger acts as a load and at the same time functions as an extension of the tongue 2. As a result, the center position O ₁ of the forced vortex generated inside the impeller moves away in the direction connecting the tongue 2 and the vortex center, and its shape also changes from the closest part of the impeller ′ and the heat exchanger 4 to the vortex center ₁ It becomes a deformed ellipse whose major axis is the direction connecting the . In addition, the flow velocity in the suction region S is very slow, resulting in a so-called dead water region, and at the same time, the through-flows f ₁ , f ₂ surrounding the forced vortex V
... was also affected by this, and the angle of incidence of the flow onto the impeller blade row was not in a favorable state.

As described above, in an air conditioner having a conventional heat exchanger, it is extremely difficult to achieve a good cross-flow fan flow, and there are limits to increasing fan efficiency.

Purpose of the invention The purpose of this invention is to eliminate the dead water area in the suction area of a cross-flow fan used as a blower in an air conditioner, and to strengthen the vortex to bring it closer to the ideal flow and improve the air blowing efficiency. be.

Structure of the Device To achieve this objective, the device widens the air flow passages between each fin of the heat exchanger at the lower end near the tongue and gradually widens toward the upper end where it contacts the rear guider. It has a narrow structure. With this structure, the air resistance of the heat exchanger becomes smaller from the upper end toward the lower end, and the flow becomes faster. As a result, the dead water region disappears, and a small, strong vortex forms near the tongue. Then, the penetration area expands and the air volume increases. In addition, the angle of incidence of the suction flow onto the blade row is improved, and the amount of work is increased. In this way, the vortex region of the cross flow fan becomes smaller and the dead water region is eliminated, thereby increasing the air blowing efficiency.

DESCRIPTION OF THE EMBODIMENTS Hereinafter, one embodiment of the present invention will be described with reference to the drawings, and the same parts as the conventional example will be given the same numbers and the explanation will be omitted.
Explain the different parts. As shown in Figure 2 a and b,
In the heat exchanger 41, the fins 51 bend one plate into a substantially V-shape, and the A side and the B side are alternately d ₁ , d ₂ , d _{3 .}
It is constructed by overlapping each other at intervals of . d ₁ , d ₂ , d ₃ are arbitrary, but d ₁ should be wider than the conventional spacing d, d ₂ should be narrower, and d ₃ should be narrower, or
Configure it to be zero. When the heat exchanger 41 is installed with the fins 51 perpendicular to the axis of the impeller 1 as shown in FIG. It changes continuously from 42 toward the lower end 43 that is in contact with the tongue 2, and becomes smaller on the lower end 43 side.

As a result, the flow in the dead water area becomes smoother,
A strong vortex V can be generated. The size of the vortex becomes smaller and the center approaches the tongue portion 2, so the penetration area becomes wider and the air volume increases. Furthermore, since the angle of incidence of the suction side flow onto the blade row is improved, the work performed by the blade row increases and the air blowing efficiency of the cross flow fan is improved.

As another example, the configuration of the fins is as shown in FIG.
A method such as b is considered, and in both cases, in the cross section of the air flow passage in the heat exchanger, from the top plate 6 to the bottom plate 7
This is a configuration in which air resistance decreases sequentially in the direction. Figure a is constructed by overlapping plates with wedge-shaped cross sections, and Figure b is constructed by spreading three plates from the bottom plate 7 to the top plate 6 to construct one fin element. And by arranging them,
This is a method of obtaining the above air resistance distribution. Even in a heat exchanger having such a fin configuration, a dead water region can be eliminated and a good flow of the cross flow fan can be obtained.

Effects of the invention As described above, in the air conditioner of this invention, the air resistance of the air flow path is gradually reduced from the upper end of the heat exchanger toward the lower end, and the air conditioner of the invention is designed to gradually reduce the air resistance of the air flow passage from the upper end of the heat exchanger to the lower end. The dead water area between the cars disappears, and a small, strong vortex appears near the tongue, expanding the penetration area and increasing the air volume. Furthermore, the direction of the flow on the suction side is improved and the work performed by the blade rows is increased, so that the air blowing efficiency of the crossflow fan is improved and the noise level due to turbulence is reduced.

[Brief explanation of the drawing]

Fig. 1a is a cross-sectional view of a conventional air conditioner using a cross flow fan, Fig. 1b is a partially fragmented front view of the heat exchanger, and Fig. 2 is a cross-sectional view of a conventional air conditioner using a cross flow fan. In the heat exchanger shown in FIG. FIGS. 4a and 4b are schematic diagrams showing the cross-flow fan flow of the air conditioner of the present invention, and are schematic diagrams of a heat exchanger according to another embodiment of the present invention. 1... Impeller, 2... Tongue, 3... Rear guider, 4... Heat exchanger, 5... Fin, 6... Heat exchanger top plate, 7... Heat exchanger bottom plate, 8... Transmission Heat tube (inside the fin penetration is omitted).

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A heat exchanger is disposed on the suction side of a cross flow fan consisting of an impeller, a tongue, and a rear guider, and this heat exchanger consists of a fin, a top plate, a bottom plate, 1. An air conditioner characterized in that the air conditioner is formed of heat transfer tubes and is configured such that the air resistance thereof gradually increases from the bottom plate toward the top plate. (2) Scope of utility model registration claims comprising a heat exchanger constructed by arranging fin elements manufactured by bending a single plate into a substantially V-shape in a substantially W-shape. The air conditioner according to paragraph 1.