JPS6246715B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cross flow fan mainly used in an air conditioner.

Conventional configuration and problems thereof Conventionally, this type of air conditioner has been configured as shown in FIG. That is, 1 is the impeller, 2 is the tongue,
3 is a rear guider, 4 is a casing side plate, and 5 is a heat exchanger. When the impeller rotates clockwise, a forced vortex with centers 0 _{and 1} is generated near the inner circumference of the impeller, and the suction side and On the discharge side, through-flows ₁ , ₂ , _3, etc., which pass through the blade row twice, are induced. In cross-flow fans having such a configuration, measures have been taken to improve fan performance mainly by changing the shape and dimensions of the tongue portion and rear guider, but the above-mentioned methods have limitations. In other words, by simply changing the casing shape and dimensions, it is not possible to completely control the forced eddy that governs the cross-flow fan flow, and the circulating flow V extends to the vicinity of the tongue, increasing the eddy area, and as a result, the through-flow The area became narrower, and there was a limit to how much fan efficiency could be improved.

Therefore, in order to eliminate the above-mentioned drawbacks, by inserting a control object that controls forced eddies into the cross-flow fan discharge area, it is possible to better control the cross-flow fan flow and thereby improve the cross-flow fan efficiency. For this purpose, there is a plane that connects the center line of the impeller with the center line of the forced vortex generated in the impeller in the discharge area of the cross flow fan in the _axial direction, and the end surface of the tongue facing the suction side. A space consisting of a plane connecting the impeller center line and the ridge line closest to the impeller outer circumferential surface, and relatively close to the impeller outer circumferential surface so as not to affect the flow through the crossflow fan. It is necessary to install a control object at the location to control the above-mentioned forced eddy. With this configuration, it is possible to suppress the spread of the vortices while keeping the forced vortices at optimal positions, and to increase the strength of the vortices.

However, the forced vortex changes its position depending on the fluid resistance of the heat exchanger installed on the suction side of the crossflow fan, and when the fluid resistance increases, the vortex moves around the inner circumference of the impeller in the opposite direction to the rotation direction. move in the direction.

Therefore, if one type of crossflow fan is used to accommodate heat exchangers with different fluid resistances, the forced vortex position will change depending on each heat exchanger. As a result, when inserting the control object described above to increase the effectiveness of the crossflow fan, the insertion position of the control object must be changed depending on the type of heat exchanger, and each time the control object is removed from the holder. It was necessary to remove it, reinsert it in the optimal position, and support it.

Purpose of the Invention The present invention is intended to eliminate such conventional drawbacks, and to make it possible to move and fix a control object at any position in the circumferential direction of the impeller at a position close to the outer peripheral surface of the impeller without removing it from the holder. The purpose of this study is to improve cross-flow fan efficiency by installing control objects at optimal positions for various heat exchangers with different fluid resistances.

Composition of the Invention In order to achieve this object, the present invention provides an air flow fan in which a heat exchanger is installed on the suction side of a cross flow fan having a casing consisting of a tongue, a rear guider, and a pair of opposing casing side plates, and an impeller. In the harmonizer, a control object for controlling the forced eddies generated inside the crossflow fan is provided in the discharge region and close to the outer circumferential surface of the impeller, and the control object can be placed at any position in the circumferential direction of the impeller. A guide groove that moves and a pair of holders that hold the upper and lower parts of the control object are respectively provided on the pair of casing side plates, at least one of the holders is pressed against the control object by an elastic body, and the holder is pressed against the control object by an elastic body. The structure includes a plurality of arcuate surfaces that fit into part of the control object.

With this configuration, even if the forced vortex position changes as a result of installing heat exchangers with different fluid resistances, the control object that controls the forced vortex does not have to be removed, but can be moved and fixed by sliding it to the optimal position. As a result, it is possible to suppress the spread of the eddies while maintaining the eddies in an optimal position, and to generate strong eddies. As a result, the cross-flow fan flow can be well controlled, so that the fan efficiency can be improved.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. In Fig. 2, 1 is an impeller, 2 is a tongue, 3 is a rear guider, 4 is a pair of casing side plates, 5 is a heat exchanger, 6 is a swirl control object, 7 is a holder that holds a control object, and 8 is a control object It is a guide groove.

In a cross-flow fan with such a structure, among the circulating flows that constitute the forced vortex generated inside the impeller, the flow V away from the center of the vortex is
is suppressed from expanding in the radial direction by the presence of the control object. That is, the region of the circulating flow that does not contribute to the flow rate can be narrowed, and as a result, the through-flow region can be widened, so that the flow rate performance can be improved. On the other hand, by inserting the above-mentioned control object, the strength of the vortex can be increased, and the through streamlines ₁ , ₂ , ₃ ... on the suction side can be
Compared to those shown in Figure 1, since the blades can be laid horizontally, the work of the blade cascade increases, and as a result, the pressure performance can also be improved. Note that in order to obtain an effect using the above-mentioned control object, attention must be paid to its insertion position. In other words, the appropriate range of the insertion position is the plane A that includes the whirlpool center line and the impeller center line in the impeller circumferential direction, and the ridge line 21 closest to the impeller outer circumferential surface on the tongue end face facing the suction side. In the space consisting of and plane B including the impeller center line,
In addition, it is not far away from the outer peripheral surface of the impeller in the radial direction,
Limited to areas not directly affected by through flow. This is because by inserting a control object into the above range, the through flow does not directly collide with the control object, but only the circulating flow flows licking the front surface of the control object, resulting in an increase in fluid resistance. This is because you can control the eddies without any problems. Therefore, if the above-mentioned range is exceeded, the eddy cannot be controlled, and the inserted object only contributes to an increase in fluid resistance, which often has the opposite effect.

Further, here, a round rod as shown in FIG. 2 was used as the control object, because a round rod with a circular cross section can be inserted regardless of the direction of flow.

However, as shown in FIG. 3, a pair of flanges 9, which have several arcuate surfaces that fit into both ends of the control object 6 and face each other in the impeller circumferential direction, sandwich the upper and lower parts of the control object. In the holder, if only both ends of the control object are round rods, they can be moved and fixed, and the discharge flow region may be wing-shaped guide vanes.

In addition, the insertion position of the control object must be changed depending on the type of heat exchanger, but both ends of the control object are round rods, and the round rod portion is attached to the flange by the force of an elastic spring 11. Since it is clamped with 9, it is possible to move and fix it by sliding it to the optimal position without removing it from the holder.

Effects of the Invention As described above, in an air conditioner in which a heat exchanger is installed on the suction side of a cross-flow fan, relatively impellers located in the discharge area and which do not directly affect the flow through the cross-flow fan are used. A control object for controlling forced eddies generated inside the crossflow fan is provided near the outer circumferential surface of the vehicle, and a guide groove for moving the control object to any position in the circumferential direction of the impeller is installed in a pair of casing side plates. In the cross flow fan of the present invention, which makes it possible to clamp and fix the control object by the spring force of a pair of holders attached to the side plates of the casing, heat exchangers with different fluid resistances are used. Even if the forced vortex position moves and changes as a result of installation, the control object that controls the forced vortex can be slid along the guide groove without having to remove it from the holder or tighten the screws. can be moved to the optimal position.
Furthermore, since the end portion of the control object is fitted onto the arcuate surface of the flange portion, displacement due to vibrations or wind pressure of the flow can be prevented. As a result, it is possible to keep the eddies in the optimal position, suppress unnecessary expansion of the eddies, and form strong eddies.
Good cross-flow fan flow can be achieved, and fan efficiency can be improved.

[Brief explanation of the drawing]

Figures 1a and b are a sectional view and a partial front view of a conventional air conditioner, respectively, and Figures 2a and b are
3A and 3B are a cross-sectional view and a partial front view of a cross flow fan showing an embodiment of the present invention, respectively, FIG. 1... Impeller, 2... Tongue, 3... Rear guider, 4... Casing side plate, 5... Heat exchanger, 6
... Control object, 7 ... Control object holder, 8 ... Control object guide groove, 9 ... Flange, 10 ... Holder cover, 11 ... Spring.

Claims (1)

[Claims] 1. A heat exchanger is installed on the suction side of a crossflow fan that has a tongue, a rear guider, a casing consisting of a pair of opposing casing side plates, and an impeller,
A control object for controlling forced eddies generated inside the cross-flow fan is provided in the discharge area and relatively close to the outer circumferential surface of the impeller that does not directly affect the flow passing through the cross-flow fan, and the control object A guide groove for moving the impeller to an arbitrary position in the circumferential direction of the impeller and a pair of holders for holding the upper and lower parts of the control object are respectively provided on the pair of casing side plates, and at least one of the holders is provided with an elastic body to support the control object. A crossflow fan that is pressed against a control object and includes a plurality of arcuate surfaces that fit into a portion of the control object.