JPS59218397A - Cross-flow fan - Google Patents

Abstract

PURPOSE:To aim at enhancing the efficiency of a fan, by arranging a control member for controlling forced vortexes in the vicinity of the outer peripheral surface of an impeller so as to make the member possible to move to an arbitrary position in the circumferential direction of the impeller and as well possible to be fixed. CONSTITUTION:A control member 6 having both ends in a rod-like shape, for controlling forced voltexes produced in the cross-flow fan is positioned in the vivinity of the outer peripheral surface of an impeller where no affection is direcly made by pierecing stream. Further, guide grooves 8 for guiding the control member 6 to an arbitrary position in the circumferential direction of the impeller 1 are formed in side plates 7, and the control member 6 is aranged to be fixedably clamped between a pair of holders 7 attached to the side plates 7. With this arrangement, in the case of the arrangement of a heat-exchanger having a different flow-resistance, the control member 6 may be moved to and fixed at an optimum position in accordance with the position of the forced vortexes which is even changed, without extracting the control rod 6 from the holders 7. Accordingly, satisfactory cross-fan stream is always obtained to make it possible to enhance the efficiency of the fan.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention mainly relates to a crossflow 7a/ that is 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 an impeller, 2 is a 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 having a center 01 is generated near the inner circumference of the impeller. The through flow f1J2 +f3・
... is induced. In cross-flow fans having such a configuration, measures have conventionally been taken to improve fan performance mainly by changing the shape and dimensions of the tongue 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 region, resulting in a narrowing of the through-flow region, which reduces fan efficiency. There were limits to how much it could be raised.

Therefore, in order to eliminate the above-mentioned drawbacks, by inserting a control object that controls the forced eddy into the crossflow fan discharge area, the crossflow 7an flow can be well controlled.
Therefore, it is possible to improve the efficiency of the cross-flow fan, but in order to do so, the vortex line that extends in the axial direction from the center 01 of the forced vortex generated inside the impeller in the discharge area of the cross-flow fan and the impeller center line. and a plane that connects the ridge line closest to the impeller outer peripheral surface on the tongue end face facing the suction side and the impeller center line,
In addition, it is necessary to install a control object for controlling the forced eddy at a position relatively close to the outer peripheral surface of the impeller so as not to affect the flow through the cross-flow fan. With this configuration, it is possible to suppress the expansion of the hollow while keeping the position of the forced swirl at an optimum position, and to increase the strength of the hollow.

However, the forced swirl changes its position depending on the fluid resistance of the heat exchanger installed on the suction side of the cross-flow fan, and when the fluid resistance increases, the forced swirl moves on the inner circumference of the impeller in the opposite direction to the rotation direction. Move in the circumferential direction.

Therefore, when one type of crossflow fan is used to support heat exchangers with different fluid resistances, the forced vortex position will change depending on each heat exchanger. As a result, when trying to increase the efficiency of a cross flow ann by inserting the control object described above, the insertion position of the control object must be changed depending on the type of heat exchanger, and the control object must be inserted into the holder each time. It was necessary to pull it out, reinsert it in the optimal position, and support it.

OBJECTS OF THE INVENTION The present invention obviates these conventional drawbacks and provides a
The ff1J rjyr body can be moved and fixed at any position in the circumferential direction of the impeller at a position close to the outer peripheral surface of the impeller without being removed from the holder, and the optimal position can be set for various heat exchangers with different fluid resistance. The purpose of this is to improve cross-flow fan efficiency by installing a control object in the cross-flow fan.

Structure of the Invention To achieve this object, the present invention provides an air conditioner comprising a casing consisting of a tongue, a rear guider, and a casing side plate, a cross 70 carrying an impeller, and a heat exchanger installed on the suction side of the fan. A control object for controlling forced eddies generated inside the cross-flow fan is provided in the discharge area and close to the outer circumferential surface of the impeller, and the control object is moved to an arbitrary position in the circumferential direction of the impeller. A guide groove is provided in the casing side plate, and the control object can be clamped and fixed by a pair of holders attached to the casing side plate.

With this configuration, even if the forced eddy position changes as a result of installing a heat exchanger with different fluid resistance, the control object that causes forced eddying can be moved and fixed by sliding it to the optimal position without removing it. As a result, it is possible to suppress the expansion of the thin layer while maintaining the thin layer in an optimal position, and to generate a strong thin layer. As a result, the crossflow fan flow can be effectively reduced by 1%, so
This can improve fan efficiency.

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 casing side plate, 6 is a heat exchanger, 6 is a thin control object, 7 is a holder that holds a control object, 8 is a control object guide groove It is.

In the cross 70-fan with such a structure,
Among the circulation flows forming the forced slender generated inside the impeller, the flow V away from the center of the slender is suppressed from expanding in the radial direction due to 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 thin plate can be increased, and the flow lines f, + f2 r f3... on the suction side can be increased.
can be laid horizontally compared to those shown in Fig. 1, so 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 OA including the thin 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. Plane containing the impeller center line′? In the space composed of 5B,
In addition, in the radial direction, it is limited to a range that is not far away from the outer circumferential surface of the impeller and is not directly affected by the through flow. This is because by inserting the control object into the above range, the tributary flow does not directly collide with the control object, but only the circulating flow flows licking the front surface of the control object, which reduces the increase in fluid resistance. This is because the eddy can be controlled without causing any damage. Therefore, if the above 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, in a holder in which a 7 flange 9 having several arcuate surfaces that fit into both ends of the control object 6 and facing each other in the impeller circumferential direction is fixed to the casing side plate, the split I41 If only both ends of the object are round rods, the object can be moved and fixed, and the discharge flow area may be a wing-shaped guide vane.

In addition, the insertion position of the control object must be changed depending on the type of heat exchanger, but since both ends of the control object are round bars, it can be moved and fixed by sliding it to the optimal position without removing it from the holder. It has become possible.

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 70 fan, a relatively large heat exchanger that is located in the discharge area and does not directly affect the flow through the cross flow fan. A control object that controls the forced eddies generated inside the crossflow fan is provided near the outer peripheral surface of the impeller, and a guide groove is provided on the casing side plate to move the control object to any position in the circumferential direction of the impeller. The present invention makes it possible to clamp and fix the above-mentioned control object with a pair of holders attached to the side plates of the casing, and as a result of installing a heat exchanger with different fluid resistance. Even if the thin position moves and changes,
Accordingly, increase the above forced eddy by 1 on the secondary side 11; IJ +
Since the ilJ proboscis body can be moved and fixed in the optimal position without being removed from the holder, it is possible to maintain the optimal position of the thin body while suppressing unnecessary expansion of the thin body, and to form a strong thin thin body. A flow fan flow can be realized, and fan efficiency can be improved.

[Brief explanation of drawings]

Figures 1f and (b) are a sectional view and a partial front view of a conventional air conditioner, and Figure 2(a) and 2(a) are respectively
3(b) is a one-digit side view and a partial front view of a cross flow fan showing one embodiment of the present invention, FIG. ) is the same side view. 1... impeller, 2... tongue, 3... mountain/rear guider, 4... casing side plate, 5... heat exchanger, 6... Controllable object, 7...Control 141vIJ body holder, 8...Mountain/control object guide groove,
9. River...7 lunge, 1o...holder cover,
11... Spring. Name of agent: Patent attorney Toshio Nakao and one other person9 Figure 2 (Q, ), b. Figure 3

Claims (2)

[Claims] (1) A cross 70 having a casing consisting of a tongue, a rear guider, and a casing side plate and an impeller - A heat exchanger is installed on the suction side of the fan, and a cross 70 that is located in the above discharge area has a direct influence on the flow through the fan. A control object 1111 for controlling the forced eddies generated inside the crossflow fan is provided at a position relatively close to the outer circumferential surface of the impeller, and a guide groove is provided for moving the control object to an arbitrary position in the circumferential direction of the impeller. A cross flow fan that is installed on a side plate of a casing, and the control object is fixed by being sandwiched between a pair of holders attached to the side plate of the casing. (2) The cross-flow fan according to claim 1, wherein at least one of the pair of holders has a structure in which the control object is held between the holders by an elastic body.