JPS6143146Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an indoor radiator for cooling and heating that uses a cross-flow fan as the impeller of the blower, and is particularly designed to prevent the reduction in air blowing capacity due to irregular airflow turbulence that occurs in the air duct. , and to prevent the generation of noise.

Conventionally, an indoor radiator for heating and cooling using a cross-flow fan as the impeller of the blower consists of a rear guider 2, an impeller 3, and a tongue part 4 inside an exterior 1, as shown in Fig. 1. A blower A having a configuration in which an impeller 3 is positioned between the
A discharge port 5 consisting of a tongue portion 4 and a rear guider 2 is provided downstream of the blower A, and a heat exchanger 6 is provided upstream.
is arranged, and one end of the heat exchanger 6 and the outer end of the tongue portion 4 are closed with a shield plate 7, the other end is fixed to the rear guider 2, and the upstream side of the heat exchanger 6 is connected to an inlet 8. It is open to the outside through. Reference numeral 9 denotes a front plate disposed on the front surface of the exterior 1, and a portion facing the discharge port 5 and the suction port 8 has a discharge port 5', respectively.
and a suction port 8'. In addition, the solid line arrow in the same figure shows the flow of airflow.

In the case of the above configuration, when the impeller 3 rotates, an air flow is formed from the suction port 8' to the discharge port 5' via the heat exchanger 6 and the impeller 3,
When the air sucked in from the suction port 8' passes through the heat exchanger 6, it becomes cold air or warm air, and is then transferred to the discharge port 5'.
It is discharged to the outside of the exterior package 1. However, the outer end of the tongue portion 4 and one end of the heat exchanger 6 are connected to the shield plate 7.
As a result, the pressure balance near the lower surface of the tongue portion 4 becomes extremely unstable, resulting in extremely irregular disturbances. For this reason, the irregular turbulence increases the load on the blower A and causes significant pulsation in the discharge flow from the discharge port 5'.
This had the disadvantage of significantly reducing air blowing performance and increasing noise. On the other hand, as a measure to solve the above-mentioned drawbacks, conventional designs have been made in which one end of the heat exchanger 6 is fixed to the lower surface of the tongue portion 4 and no space is provided on the lower surface of the tongue portion 4, as shown in FIG. In addition, in this case, it is necessary to arrange the impeller behind the rear surface of the heat exchanger 6, which results in the drawback that the depth dimension of the indoor unit increases. In addition, in FIGS. 1 and 2, solid line arrows indicate air flow, and in FIG. 2, the same reference numerals as in FIG. 1 indicate the same parts.

In contrast, the present invention solves all of the above drawbacks by improving the structure of the shield plate.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 3 shows an embodiment of the present invention, which consists of a rear guider 12 in an exterior 11, an impeller 13 using a cross flow fan, and a tongue part 14. A blower B having a structure in which a blower 13 is located is provided, a discharge port 15 made of a tongue portion 14 and a rear guider 12 is provided downstream of the blower B, and a heat exchanger 16 is provided below the impeller 13. A shield plate 17 closes the space between the front end of the upper surface of the heat exchanger 16 and the vicinity of the inner end of the lower surface of the tongue portion 14 . That is, the shield plate 17 extends from the front end of the upper surface of the heat exchanger 16 to the tongue portion 14.
It is inclined toward the impeller 13 as it reaches the lower surface. Furthermore, pressure adjustment holes 20 consisting of small holes are provided near both left and right ends of the shield plate 17 to communicate the inside of the blower B with the outside of the shield plate 17, and the entire inside of the shield plate 17 has sound absorption properties and air permeability. A heat insulating material 21 is disposed to cover the pressure adjustment hole 20. In addition, the rear portion of the upper surface of the heat exchanger 16, that is, the portion closest to the impeller B, has its corners cut off to form a surface facing the impeller B, and the lower surface is fixed to the rear guider 12, and further upstream is open to the outside via the suction port 18. Reference numeral 19 denotes a front plate provided on the front surface of the exterior 11, and a discharge port 15' and a suction port 18' are provided in a portion facing the discharge port 15 and the suction port 18, respectively. In addition, in the figure, solid line arrows indicate air flow.

In the case of the above configuration, the rotation of the impeller 13 causes the heat exchanger 1 to be moved from the suction port 18'.
6. An air flow is formed through the impeller 13 to the discharge port 15', and when the air sucked from the suction port 18' passes through the heat exchanger 16, it becomes cold air or warm air and flows from the discharge port 15' to the exterior. 11 is discharged outside.
On the other hand, the space between the upper end of the heat exchanger 16 and the tongue portion 14 is closed by a shield plate 17 that is inclined toward the impeller 13 from the front end of the upper surface of the heat exchanger 16 to the lower surface of the tongue portion 14. A pressure adjustment hole 20 consisting of a small hole is provided near both left and right ends of the shield plate 17,
Since the inside of the blower B and the outside of the shield plate 17 are communicated with each other, air flows in and out through the pressure adjustment hole 20 depending on the pressure state of the blower B, especially the inner surface of the shield plate 17, thereby preventing the occurrence of pressure imbalance. do. Further, since the pressure adjustment hole 20 is formed of a small hole, the amount of air flowing in and out through the pressure adjustment hole 20 is extremely small, and the effect on the heating and cooling capacity is almost negligible. In addition, since a heat insulating material 21 having sound absorption and breathability is disposed on the entire inside of the shield plate 17 so as to cover the pressure adjustment hole 20, noise caused by air flow flowing in and out of the pressure adjustment hole 20 can be avoided. In addition to preventing the occurrence of noise, the noise inside the blower B can be absorbed, and the noise emitted to the outside of the exterior 11 from the discharge port 15 can be significantly reduced. Furthermore, since the inner surface of the shield plate 17 is insulated, it is possible to prevent dew condensation from occurring on the outer surface of the shield plate 17. Note that in this configuration, the heat insulating material 2
1 is arranged on the inner surface of the shield plate 17, but even if it is arranged on the outer surface of the shield plate 17,
It goes without saying that the same effects can be obtained in terms of preventing dew condensation on the exterior surface of the shield plate 17 and preventing the generation of noise due to airflow flowing in and out of the pressure adjustment hole 20.

Furthermore, by disposing the shield plate 17, the impeller 13 can be disposed at an arbitrary distance above the heat exchanger 16, and the rear end of the upper surface of the heat exchanger 16 closest to the impeller 13 Since the corners are cut off to provide a surface 16' facing the impeller 13, the impeller 13 can be placed forward.

Therefore, there is no need to arrange an impeller behind the rear surface of the heat exchanger 16 as in the conventional case, and there is an advantage that the depth dimension of the indoor unit can be reduced.

As explained above, according to the present invention, it is possible to prevent the occurrence of irregular turbulence inside the blower, thereby improving the blowing performance and providing a low-noise and thin indoor radiator. This has a great practical effect.

[Brief explanation of the drawing]

1 and 2 are sectional views of a conventional indoor radiator, and FIG. 3 is a sectional view of an indoor radiator according to an embodiment of the present invention. 12... Rear guider, 13... Impeller, 14
...Tongue, 16... Heat exchanger, 16'... Surface facing the impeller, 17... Shield plate, 20... Pressure adjustment hole, 21... Heat insulating material.

Claims (1)

[Scope of Claim for Utility Model Registration] In an indoor radiator that uses a cross-flow type impeller, the tongue and the upper end of the heat exchanger are separated, and the space between the heat exchanger and the tongue is closed with a shield plate, An indoor radiator equipped with pressure adjustment holes consisting of small holes. An indoor radiator according to claim 1, wherein pressure adjustment holes are provided near both left and right ends of the shield plate. The indoor radiator according to claim 1 or 2, wherein a heat insulating material having sound absorbing properties and breathability is disposed on the inner or outer surface of the shield plate so as to cover the pressure adjustment hole.