JPS6223227B2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention heats air sucked from an intake port by a cross-flow type impeller using a heating element to generate warm air, and blows the warm air into a room from a discharge port. This relates to an electric hot air heater.

Conventional configuration and its problems A conventional electric warm air heater of this type was configured as shown in FIG. That is, 1 is the exterior body,
Reference numeral 2 denotes a blower disposed within the exterior body 1, and the blower 2 is composed of a cross-flow type impeller 3, a tongue portion 4 and a rear guider 5 facing each other with the impeller 3 in between. Reference numeral 6 denotes a wind cylinder disposed within the exterior body 1, and this wind body 6 is connected between a discharge port 7 provided above the front surface of the exterior body 1 and the downstream side of the blower 2. Reference numeral 8 indicates a heating element disposed in the ventilation passage 9 within the wind cylinder 6, and reference numeral 10 indicates an intake port provided at the lower front of the exterior body 1 located upstream of the blower 2.

The operation of the conventional configuration described above will be explained. When the impeller 3 rotates in the direction indicated by the dashed arrow, a vortex 11, which is located near the tongue portion 4 and serves as the basis of the flow, is formed on the outer periphery of the impeller 3. Due to the formation of this vortex 11, an air flow is formed from the intake port 10 through the ventilation path 9 toward the discharge port 7. This air flow is transmitted to a heating element 8 disposed within the ventilation passage 9.
The hot air is heated by coming into contact with the air, and is discharged from the discharge port 7 as warm air, which is then used to heat the room.

However, in the conventional configuration described above, since the heating element 8 is disposed within the ventilation path 9, the air resistance due to the heating element 8 is large, and this accounts for most of the air blowing load by the impeller 3.
As the airflow passes through the heating element 8, the airflow collides with the heating element 8 and causes turbulence.As a result, the air blowing load further increases and resonance noise is generated, which may harm the user. The problem is that it becomes very harsh to the ears. Furthermore, in the conventional configuration, since the discharge port 7 and the intake port 10 are on the same surface of the exterior body 1, the airflow discharged from the discharge port 7 flows directly to the intake port 10, which causes a so-called short circuit. As a result, this was also a cause of a decrease in the heating effect.

Purpose of the Invention In view of the above-mentioned conventional problems, the present invention provides a so-called short circuit that can significantly reduce the air blowing load caused by the impeller and in which the air flow discharged from the discharge port flows directly to the intake port. The object of the present invention is to provide an electric hot air heater that can significantly reduce the number of occurrences.

Structure of the Invention In order to achieve the above object, the present invention provides a first guider and a second guider that are disposed facing each other across a cross-flow type impeller, and are located upstream of the impeller. and the first guider and the second guider
The guider forms an intake port, and the first guider and the second guider located downstream of the impeller form a discharge port, and the impeller, the first guider, and the second guider The first guider is integrally connected between a rotary plate provided below the impeller and a support plate provided above the impeller in order to keep their positional relationship constant. is provided with a first tongue located on the downstream side of the impeller and close to the outer periphery of the impeller, and the second guider has a surface that faces the first tongue and the impeller, and the second guider has a surface that faces the first tongue and the impeller. The arcuate surface is formed in an arc shape, and one end of the arcuate surface located on the upstream side of the impeller is provided with a second tongue close to the outer periphery of the impeller, and the arcuate surface extends from the one end to the other end. The gap between the impeller and the outer periphery thereof is gradually expanded, and a heating element is embedded in a portion of the second guider located downstream of the impeller.

According to the above configuration, when the impeller rotates and an airflow is formed, the vortex, which is the center of airflow formation, is directed to the second tongue facing the first tongue provided on the first guider.
Since it is formed near the outer periphery of the impeller on the guider side, the airflow that flows across the impeller is concentrated near the second guider.
Since the heating element is embedded in the part of the second guider located downstream of the impeller, the air flow can efficiently receive the heat of this heating element and can be used for hot air heating. At the same time, since there is no heating element in the ventilation path connecting the intake port and the discharge port, there is no air resistance due to the heating element, and as a result, the air blowing load caused by the impeller can be significantly reduced. Since the discharge port is provided on almost the opposite side, it is possible to significantly reduce the occurrence of the so-called short circuit, where the airflow discharged from the discharge port flows directly to the intake port, as in the past. .

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. FIG. 2 shows a top sectional view for explaining the operating principle of an electric hot air heater according to an embodiment of the present invention, and FIG. 3 shows a perspective view of the same electric hot air heater. .

In FIGS. 2 and 3, reference numeral 21 denotes a cross-flow type impeller. This impeller 21 is arranged vertically, and below the impeller 21 is an electric motor 22 for rotating the impeller 21. has been set up. Reference numerals 23 and 24 denote a first guider and a second guider, which are disposed facing each other with the impeller 21 in between, and are located upstream of the impeller 21 and are connected to the first guider 23. An intake port 25 is formed with the second guider 24, and the impeller 2
A discharge port 26 is formed by the first guider 23 and the second guider 24 located on the downstream side of the discharge port 1 . In addition, in order to maintain a constant positional relationship between the impeller 21, the first guider 23, and the second guider 24, a rotary plate 27 provided below the impeller 21 and a rotary plate 27 provided above the impeller 21 are connected to each other. It is integrally connected to a support plate 28 provided therebetween. Therefore, by rotating the rotating plate 27, the first
The guider 23 and the second guider 24 rotate along the outer periphery of the impeller 21 about the rotating shaft 21a of the impeller 21 in the direction of the arrow a-a' of the two-dot chain line. 29 is a first tongue portion provided on the first guider 23; this first tongue portion 29 is connected to the impeller 2;
The impeller 21 is located on the downstream side of the impeller 21 and is formed close to the outer periphery of the impeller 21 . Further, the second guider 24 has a surface 30 that faces the first tongue portion 29 and the impeller 21 and is formed into a substantially arc shape, and one end of the arc surface 30 is located upstream of the impeller 21. There is a second tongue portion 3 close to the outer periphery of the impeller 21.
1, and the arcuate surface 30 is formed so that the gap between it and the outer periphery of the impeller 21 gradually increases from one end to the other end. Reference numeral 32 denotes a heating element such as a sheathed heater buried in a portion of the second guider 24 located downstream of the impeller 21. This heating element 32 has a particularly large amount of heat generated in the portion facing the first tongue portion 29. They are buried densely so that they are large.

Reference numeral 33 denotes a plurality of deflection vanes located at the discharge port 26, and these deflection vanes 33 are integrally connected via a connecting rod 34, and these deflection vanes 33 are connected to the impeller. The impeller 21 has a tiltable structure in order to deflect the air flow sent from the impeller 21 in the vertical direction, that is, in the direction of the rotation axis of the impeller 21. Further, the rotary plate 27 is automatically rotated using the electric motor 22 as a power source via a cam, gears (none of which are shown), etc.
As the deflection blades 33 rotate, the plurality of deflection blades 33 are also configured to tilt in a vertical direction, that is, in an up-down direction, substantially periodically. 35 is a base of the electric hot air heater, and this base 35 has the electric motor 22 built therein. Reference numeral 36 denotes a protective net arranged to prevent pieces of paper and the like from flowing into the electric hot air heater.

The operation of the above configuration will be explained next.
When the impeller 21 rotates in the direction of the dashed arrow b, external air is sucked in from the intake port 25 as shown by the solid arrow, and this airflow flows from near the upstream of the first tongue 29 to the second guider 24. Arc surface 30
It flows across the impeller 21 in the direction of , and then flows along the inner surface of the second guider 24 and is heated by the heating element 32 to become warm air, and this warm air is discharged from the discharge port 26 to the outside of the machine. is discharged to. In this case, since the airflow is made to flow as shown by the solid line arrow in FIG. It will be formed near the outer periphery of the impeller 21 on the guider 24 side, and as a result, the impeller 21
The airflow flowing across the second guider 24
The flow becomes concentrated in the vicinity. In this case, the heating element 32 is buried densely in the part of the second guider 24 facing the first tongue part 29, that is, in the part where the main flow of the air flow is concentrated due to the vortex flow 37. The air flow efficiently receives heat from the heating element 32 and becomes warm air, which is then discharged from the discharge port 26. Furthermore, since the heating element 32 is embedded in the second guider 24, there is no heating element 32 in the ventilation path connecting the intake port 25 and the discharge port 26, and as a result, the hot air resistance due to the heating element 32 is reduced. Therefore, the air blowing load caused by the impeller 21 can also be significantly reduced.

In addition, since the airflow flows as shown by the solid arrow in FIG. The occurrence of a so-called short circuit in which the discharge flow from the outlet 26 flows directly to the intake port 25 is greatly reduced, and therefore heating efficiency can be further improved. And also, the impeller 21,
First guider 23 and second guider 24
are integrally connected by the rotary plate 27 and the support plate 28, so by rotating the rotary plate 27,
To rotate the first guider 23 and the second guider 24 along the outer periphery of the impeller 21 while keeping the positional relationship between the impeller 21 and the first guider 23 and the second guider 24 constant. As a result, the inflow and discharge directions of air can be changed in any direction around the rotation axis of the impeller 21 without changing the air blowing performance. Further, the discharge port 26 is provided with a plurality of deflection vanes 33 for deflecting the airflow in the vertical direction, and the deflection vanes 33 almost synchronously move in the vertical direction as the rotary plate 27 rotates. Since it is configured to be tilted and movable in the vertical direction, the rotating plate 27
In addition to the change in the wind direction around the rotation axis of the impeller 21 due to the rotation of the impeller 21, it is possible to cause a change in the wind direction in the vertical direction, that is, in the up and down direction, and as a result, hot air is effectively discharged into the indoor space. It is something that can be done.

Effects of the Invention As described above, according to the electric hot air heater of the present invention, when the impeller rotates and an airflow is formed, the vortex, which is the center of airflow formation, flows through the vortex provided in the first guider. It is formed near the outer periphery of the impeller on the second guider side facing the first tongue, so that the airflow that flows across the impeller is concentrated near the second guider. Since the heating element is buried in the part of the second guider located on the downstream side of the impeller, the air flow can efficiently receive the heat of this heating element and provide hot air heating. In addition, since there is no heating element in the ventilation path connecting the intake port and the discharge port, there is no air resistance due to the heating element, and as a result, the air blowing load caused by the impeller can be significantly reduced, and the air intake Since the mouth and the discharge port are provided on almost opposite sides, it is possible to significantly reduce the occurrence of the so-called short circuit, where the airflow discharged from the discharge port flows directly to the intake port, which is the case with conventional systems. It has various excellent features.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing a conventional electric hot air heater, Fig. 2 is a top sectional view for explaining the operating principle of an electric hot air heater according to an embodiment of the present invention, and Fig. 3 is the same. It is a perspective view of an electric warm air heater. 21... impeller, 23... first guider, 2
4...Second guider, 25...Intake port, 26...
...Discharge port, 27... Rotating plate, 28... Support plate, 2
9...First tongue, 30...Circular surface, 31...Second tongue, 32...Heating element.

Claims (1)

[Claims] 1 A first guider and a second guider are arranged facing each other with a cross-flow type impeller in between, and the first guider and the second guider are located upstream of the impeller. an intake port is formed by the first guider and the second guider located downstream of the impeller, and a discharge port is formed by the first guider and the second guider located downstream of the impeller; is integrally connected between a rotary plate provided below the impeller and a support plate provided above the impeller in order to maintain a constant positional relationship between them, and the first guider , a first tongue portion located downstream of the impeller and close to the outer periphery of the impeller is provided, and the second guider has a substantially arc-shaped surface that faces the first tongue portion and the impeller with the impeller in between. One end of this arcuate surface located on the upstream side of the impeller is provided with a second tongue close to the outer periphery of the impeller, and the arcuate surface extends from this one end to the other end of the impeller. An electric hot air heater in which a gap between the second guider and the outer periphery of the second guider gradually increases, and a heating element is embedded in a portion of the second guider located downstream of the impeller.